The Ecere SDK - sdk/blob - ecere/src/gfx/drivers/OpenGLDisplayDriver.ec

   1 // We were using PBUFFER for alpha compositing on Linux before, but it does not seem to work, nor be required anymore.
   2 // #define USEPBUFFER
   3
   4 namespace gfx::drivers;
   5
   6 // OpenGL Extensions
   7 #if defined(__unix__) || defined(__APPLE__)
   8
   9 #if !defined(__MINGW32__)
  10    #define GL_GLEXT_PROTOTYPES
  11 #endif
  12
  13 #define pointer _pointer
  14
  15 #ifdef ECERE_MINIGLX
  16
  17 //#include <GL/miniglx.h>
  18
  19 #else
  20
  21    #if !defined(__ANDROID__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
  22
  23       #define property _property
  24       #define new _new
  25       #define class _class
  26
  27       #define Window    X11Window
  28       #define Cursor    X11Cursor
  29       #define Font      X11Font
  30       #define Display   X11Display
  31       #define Time      X11Time
  32       #define KeyCode   X11KeyCode
  33       #define Picture   X11Picture
  34       #define uint _uint
  35
  36       #include <X11/Xlib.h>
  37       #include <X11/Xutil.h>
  38       #include <GL/glx.h>
  39       #include <X11/extensions/XShm.h>
  40       #include <sys/ipc.h>
  41       #include <sys/shm.h>
  42       #include <X11/extensions/Xrender.h>
  43       #include <X11/extensions/shape.h>
  44
  45       #undef Window
  46       #undef Cursor
  47       #undef Font
  48       #undef Display
  49       #undef Time
  50       #undef KeyCode
  51       #undef Picture
  52       #undef uint
  53       #undef new
  54       #undef property
  55       #undef class
  56
  57    #endif
  58
  59 #endif
  60
  61 #endif
  62
  63 #if defined(__APPLE__)
  64 #include <OpenGl/gl.h>
  65 #endif
  66
  67 #if defined(__WIN32__) || defined(__unix__) || defined(__APPLE__)
  68
  69 #if defined(__WIN32__)
  70    #define WIN32_LEAN_AND_MEAN
  71    #undef _WIN32_WINNT
  72    #define _WIN32_WINNT 0x0502
  73    #define String Sting_
  74    #include <windows.h>
  75    #undef String
  76 #endif
  77
  78 #if defined(__ANDROID__) || defined(__ODROID__)
  79
  80 #define uint _uint
  81 #define property _property
  82 #define new _new
  83 #define class _class
  84 #define Window    X11Window
  85 #define Cursor    X11Cursor
  86 #define Font      X11Font
  87 #define Display   X11Display
  88 #define Time      X11Time
  89 #define KeyCode   X11KeyCode
  90 #define Picture   X11Picture
  91 #define Bool      X11Bool
  92
  93    #include <GLES/gl.h>
  94    #include <EGL/egl.h>
  95
  96 #undef Bool
  97 #undef Picture
  98 #undef Window
  99 #undef Cursor
 100 #undef Font
 101 #undef Display
 102 #undef Time
 103 #undef KeyCode
 104 #undef uint
 105 #undef new
 106 #undef property
 107 #undef class
 108
 109 #elif defined(__EMSCRIPTEN__)
 110
 111    #define property _property
 112    #define uint _uint
 113
 114    #include <GL/gl.h>
 115
 116    //#include <GLES/gl.h>
 117    //#include <EGL/egl.h>
 118
 119    //#include <GLES2/gl.h>
 120    //#include <EGL/egl.h>
 121
 122    //#include <GLES2/gl2.h>
 123    #include <GL/glfw.h>
 124    #include <emscripten/emscripten.h>
 125
 126    #undef property
 127    #undef uint
 128
 129 #else
 130
 131    #include <GL/gl.h>
 132    #include <GL/glext.h>
 133
 134 #endif
 135
 136 #if defined(__ODROID__) && !defined(_GLES)
 137 #define _GLES
 138 #endif
 139
 140 #if defined(__EMSCRIPTEN__)
 141 #define EM_MODE
 142 // #define _GLES
 143 #endif
 144
 145 //#define EM_MODE
 146
 147 #undef pointer
 148
 149 import "Display"
 150
 151 #if defined(__unix__) || defined(__APPLE__)
 152
 153    #if !defined(__ANDROID__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
 154    import "XInterface"
 155    #endif
 156
 157 #endif
 158
 159 static double nearPlane = 1;
 160
 161 public double glesGetNearPlane()
 162 {
 163    return nearPlane;
 164 }
 165
 166 public void glesSetNearPlane(double value)
 167 {
 168    nearPlane = value;
 169 }
 170
 171 #define glLoadMatrix glLoadMatrixd
 172 #define glMultMatrix glMultMatrixd
 173 #define glGetMatrix  glGetDoublev
 174 #define glTranslate glTranslated
 175 #define glScale glScaled
 176
 177 /*
 178 #define glVertex3v glVertex3dv
 179 #define glNormal3v glNormal3dv
 180 */
 181
 182 /*
 183 //#ifdef VERTEX_FORMAT_DOUBLE
 184
 185 #define glLoadMatrix glLoadMatrixd
 186 #define glMultMatrix glMultMatrixd
 187 #define glGetMatrix  glGetDoublev
 188 #define glVertex3v glVertex3dv
 189 #define glNormal3v glNormal3dv
 190 #define glTranslate glTranslated
 191 #define glScale glScaled
 192 //#define GL_VERTEX_FORMAT   GL_DOUBLE
 193
 194 #else
 195
 196 #define glLoadMatrix glLoadMatrixf
 197 #define glMultMatrix glMultMatrixf
 198 #define glGetMatrix  glGetFloatv
 199 #define glVertex3v glVertex3fv
 200 #define glNormal3v glNormal3fv
 201 #define glTranslate glTranslatef
 202 #define glScale glScalef
 203 //#define GL_VERTEX_FORMAT   GL_FLOAT
 204
 205 #endif
 206 */
 207
 208 #define GL_ARRAY_BUFFER_ARB            0x8892
 209 #define GL_ELEMENT_ARRAY_BUFFER_ARB    0x8893
 210 #define GL_STATIC_DRAW_ARB             0x88E4
 211 #define GL_LIGHT_MODEL_COLOR_CONTROL   0x81F8
 212 #define GL_SEPARATE_SPECULAR_COLOR     0x81FA
 213
 214 #define GL_MULTISAMPLE_ARB             0x809D
 215
 216 #if defined(__WIN32__)
 217
 218    #define WGL_SAMPLE_BUFFERS_ARB              0x2041
 219    #define WGL_SAMPLES_ARB                     0x2042
 220
 221    #define  WGL_WGLEXT_VERSION   1
 222    #define  WGL_FRONT_COLOR_BUFFER_BIT_ARB   0x00000001
 223    #define  WGL_BACK_COLOR_BUFFER_BIT_ARB   0x00000002
 224    #define  WGL_DEPTH_BUFFER_BIT_ARB   0x00000004
 225    #define  WGL_STENCIL_BUFFER_BIT_ARB   0x00000008
 226    #define  WGL_NUMBER_PIXEL_FORMATS_ARB   0x2000
 227    #define  WGL_DRAW_TO_WINDOW_ARB   0x2001
 228    #define  WGL_DRAW_TO_BITMAP_ARB   0x2002
 229    #define  WGL_ACCELERATION_ARB   0x2003
 230    #define  WGL_NEED_PALETTE_ARB   0x2004
 231    #define  WGL_NEED_SYSTEM_PALETTE_ARB   0x2005
 232    #define  WGL_SWAP_LAYER_BUFFERS_ARB   0x2006
 233    #define  WGL_SWAP_METHOD_ARB   0x2007
 234    #define  WGL_NUMBER_OVERLAYS_ARB   0x2008
 235    #define  WGL_NUMBER_UNDERLAYS_ARB   0x2009
 236    #define  WGL_TRANSPARENT_ARB   0x200A
 237    #define  WGL_TRANSPARENT_RED_VALUE_ARB   0x2037
 238    #define  WGL_TRANSPARENT_GREEN_VALUE_ARB   0x2038
 239    #define  WGL_TRANSPARENT_BLUE_VALUE_ARB   0x2039
 240    #define  WGL_TRANSPARENT_ALPHA_VALUE_ARB   0x203A
 241    #define  WGL_TRANSPARENT_INDEX_VALUE_ARB   0x203B
 242    #define  WGL_SHARE_DEPTH_ARB   0x200C
 243    #define  WGL_SHARE_STENCIL_ARB   0x200D
 244    #define  WGL_SHARE_ACCUM_ARB   0x200E
 245    #define  WGL_SUPPORT_GDI_ARB   0x200F
 246    #define  WGL_SUPPORT_OPENGL_ARB   0x2010
 247    #define  WGL_DOUBLE_BUFFER_ARB   0x2011
 248    #define  WGL_STEREO_ARB   0x2012
 249    #define  WGL_PIXEL_TYPE_ARB   0x2013
 250    #define  WGL_COLOR_BITS_ARB   0x2014
 251    #define  WGL_RED_BITS_ARB   0x2015
 252    #define  WGL_RED_SHIFT_ARB   0x2016
 253    #define  WGL_GREEN_BITS_ARB   0x2017
 254    #define  WGL_GREEN_SHIFT_ARB   0x2018
 255    #define  WGL_BLUE_BITS_ARB   0x2019
 256    #define  WGL_BLUE_SHIFT_ARB   0x201A
 257    #define  WGL_ALPHA_BITS_ARB   0x201B
 258    #define  WGL_ALPHA_SHIFT_ARB   0x201C
 259    #define  WGL_ACCUM_BITS_ARB   0x201D
 260    #define  WGL_ACCUM_RED_BITS_ARB   0x201E
 261    #define  WGL_ACCUM_GREEN_BITS_ARB   0x201F
 262    #define  WGL_ACCUM_BLUE_BITS_ARB   0x2020
 263    #define  WGL_ACCUM_ALPHA_BITS_ARB   0x2021
 264    #define  WGL_DEPTH_BITS_ARB   0x2022
 265    #define  WGL_STENCIL_BITS_ARB   0x2023
 266    #define  WGL_AUX_BUFFERS_ARB   0x2024
 267    #define  WGL_NO_ACCELERATION_ARB   0x2025
 268    #define  WGL_GENERIC_ACCELERATION_ARB   0x2026
 269    #define  WGL_FULL_ACCELERATION_ARB   0x2027
 270    #define  WGL_SWAP_EXCHANGE_ARB   0x2028
 271    #define  WGL_SWAP_COPY_ARB   0x2029
 272    #define  WGL_SWAP_UNDEFINED_ARB   0x202A
 273    #define  WGL_TYPE_RGBA_ARB   0x202B
 274    #define  WGL_TYPE_COLORINDEX_ARB   0x202C
 275    #define  ERROR_INVALID_PIXEL_TYPE_ARB   0x2043
 276    #define  ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB   0x2054
 277    #define  WGL_DRAW_TO_PBUFFER_ARB   0x202D
 278    #define  WGL_MAX_PBUFFER_PIXELS_ARB   0x202E
 279    #define  WGL_MAX_PBUFFER_WIDTH_ARB   0x202F
 280    #define  WGL_MAX_PBUFFER_HEIGHT_ARB   0x2030
 281    #define  WGL_PBUFFER_LARGEST_ARB   0x2033
 282    #define  WGL_PBUFFER_WIDTH_ARB   0x2034
 283    #define  WGL_PBUFFER_HEIGHT_ARB   0x2035
 284    #define  WGL_PBUFFER_LOST_ARB   0x2036
 285    #define  ERROR_INVALID_PIXEL_TYPE_EXT   0x2043
 286    #define  WGL_NUMBER_PIXEL_FORMATS_EXT   0x2000
 287    #define  WGL_DRAW_TO_WINDOW_EXT   0x2001
 288    #define  WGL_DRAW_TO_BITMAP_EXT   0x2002
 289    #define  WGL_ACCELERATION_EXT   0x2003
 290    #define  WGL_NEED_PALETTE_EXT   0x2004
 291    #define  WGL_NEED_SYSTEM_PALETTE_EXT   0x2005
 292    #define  WGL_SWAP_LAYER_BUFFERS_EXT   0x2006
 293    #define  WGL_SWAP_METHOD_EXT   0x2007
 294    #define  WGL_NUMBER_OVERLAYS_EXT   0x2008
 295    #define  WGL_NUMBER_UNDERLAYS_EXT   0x2009
 296    #define  WGL_TRANSPARENT_EXT   0x200A
 297    #define  WGL_TRANSPARENT_VALUE_EXT   0x200B
 298    #define  WGL_SHARE_DEPTH_EXT   0x200C
 299    #define  WGL_SHARE_STENCIL_EXT   0x200D
 300    #define  WGL_SHARE_ACCUM_EXT   0x200E
 301    #define  WGL_SUPPORT_GDI_EXT   0x200F
 302    #define  WGL_SUPPORT_OPENGL_EXT   0x2010
 303    #define  WGL_DOUBLE_BUFFER_EXT   0x2011
 304    #define  WGL_STEREO_EXT   0x2012
 305    #define  WGL_PIXEL_TYPE_EXT   0x2013
 306    #define  WGL_COLOR_BITS_EXT   0x2014
 307    #define  WGL_RED_BITS_EXT   0x2015
 308    #define  WGL_RED_SHIFT_EXT   0x2016
 309    #define  WGL_GREEN_BITS_EXT   0x2017
 310    #define  WGL_GREEN_SHIFT_EXT   0x2018
 311    #define  WGL_BLUE_BITS_EXT   0x2019
 312    #define  WGL_BLUE_SHIFT_EXT   0x201A
 313    #define  WGL_ALPHA_BITS_EXT   0x201B
 314    #define  WGL_ALPHA_SHIFT_EXT   0x201C
 315    #define  WGL_ACCUM_BITS_EXT   0x201D
 316    #define  WGL_ACCUM_RED_BITS_EXT   0x201E
 317    #define  WGL_ACCUM_GREEN_BITS_EXT   0x201F
 318    #define  WGL_ACCUM_BLUE_BITS_EXT   0x2020
 319    #define  WGL_ACCUM_ALPHA_BITS_EXT   0x2021
 320    #define  WGL_DEPTH_BITS_EXT   0x2022
 321    #define  WGL_STENCIL_BITS_EXT   0x2023
 322    #define  WGL_AUX_BUFFERS_EXT   0x2024
 323    #define  WGL_NO_ACCELERATION_EXT   0x2025
 324    #define  WGL_GENERIC_ACCELERATION_EXT   0x2026
 325    #define  WGL_FULL_ACCELERATION_EXT   0x2027
 326    #define  WGL_SWAP_EXCHANGE_EXT   0x2028
 327    #define  WGL_SWAP_COPY_EXT   0x2029
 328    #define  WGL_SWAP_UNDEFINED_EXT   0x202A
 329    #define  WGL_TYPE_RGBA_EXT   0x202B
 330    #define  WGL_TYPE_COLORINDEX_EXT   0x202C
 331    #define  WGL_DRAW_TO_PBUFFER_EXT   0x202D
 332    #define  WGL_MAX_PBUFFER_PIXELS_EXT   0x202E
 333    #define  WGL_MAX_PBUFFER_WIDTH_EXT   0x202F
 334    #define  WGL_MAX_PBUFFER_HEIGHT_EXT   0x2030
 335    #define  WGL_OPTIMAL_PBUFFER_WIDTH_EXT   0x2031
 336    #define  WGL_OPTIMAL_PBUFFER_HEIGHT_EXT   0x2032
 337    #define  WGL_PBUFFER_LARGEST_EXT   0x2033
 338    #define  WGL_PBUFFER_WIDTH_EXT   0x2034
 339    #define  WGL_PBUFFER_HEIGHT_EXT   0x2035
 340    #define  WGL_DEPTH_FLOAT_EXT   0x2040
 341    #define  WGL_SAMPLE_BUFFERS_3DFX   0x2060
 342    #define  WGL_SAMPLES_3DFX   0x2061
 343    #define  WGL_SAMPLE_BUFFERS_EXT   0x2041
 344    #define  WGL_SAMPLES_EXT   0x2042
 345    #define  WGL_GENLOCK_SOURCE_MULTIVIEW_I3D   0x2044
 346    #define  WGL_GENLOCK_SOURCE_EXTENAL_SYNC_I3D   0x2045
 347    #define  WGL_GENLOCK_SOURCE_EXTENAL_FIELD_I3D   0x2046
 348    #define  WGL_GENLOCK_SOURCE_EXTENAL_TTL_I3D   0x2047
 349    #define  WGL_GENLOCK_SOURCE_DIGITAL_SYNC_I3D   0x2048
 350    #define  WGL_GENLOCK_SOURCE_DIGITAL_FIELD_I3D   0x2049
 351    #define  WGL_GENLOCK_SOURCE_EDGE_FALLING_I3D   0x204A
 352    #define  WGL_GENLOCK_SOURCE_EDGE_RISING_I3D   0x204B
 353    #define  WGL_GENLOCK_SOURCE_EDGE_BOTH_I3D   0x204C
 354    #define  WGL_GAMMA_TABLE_SIZE_I3D   0x204E
 355    #define  WGL_GAMMA_EXCLUDE_DESKTOP_I3D   0x204F
 356    #define  WGL_DIGITAL_VIDEO_CURSOR_ALPHA_FRAMEBUFFER_I3D   0x2050
 357    #define  WGL_DIGITAL_VIDEO_CURSOR_ALPHA_VALUE_I3D   0x2051
 358    #define  WGL_DIGITAL_VIDEO_CURSOR_INCLUDED_I3D   0x2052
 359    #define  WGL_DIGITAL_VIDEO_GAMMA_CORRECTED_I3D   0x2053
 360    #define  WGL_ARB_buffer_region   1
 361    #define  WGL_ARB_extensions_string   1
 362    #define  WGL_ARB_pixel_format   1
 363    #define  WGL_ARB_make_current_read   1
 364    #define  WGL_ARB_pbuffer   1
 365    #define  WGL_EXT_display_color_table   1
 366    #define  WGL_EXT_extensions_string   1
 367    #define  WGL_EXT_make_current_read   1
 368    #define  WGL_EXT_pbuffer   1
 369    #define  WGL_EXT_pixel_format   1
 370    #define  WGL_EXT_swap_control   1
 371    #define  WGL_WGL_EXT_depth_float   1
 372    #define  WGL_WGL_3DFX_multisample   1
 373    #define  WGL_WGL_EXT_multisample   1
 374    #define  WGL_NV_allocate_memory   1
 375
 376    /*
 377    typedef void (APIENTRY * PFNGLACTIVETEXTUREARBPROC) (GLenum target);
 378    typedef void (APIENTRY * PFNGLMULTITEXCOORD2FARBPROC) (GLenum target, GLfloat s, GLfloat t);
 379    typedef void (APIENTRY * PFNGLCLIENTACTIVETEXTUREARBPROC) (GLenum target);
 380    typedef void (APIENTRY * PFNGLLOCKARRAYSEXTPROC) (GLint first, GLsizei count);
 381    typedef void (APIENTRY * PFNGLUNLOCKARRAYSEXTPROC) (void);
 382    */
 383
 384    /*
 385    typedef int (APIENTRY * PFNGLBINDBUFFERARBPROC) (GLenum target, GLuint buffer);
 386    typedef int (APIENTRY * PFNGLDELETEBUFFERSARBPROC) (GLsizei n, const GLuint *buffers);
 387    typedef int (APIENTRY * PFNGLGENBUFFERSARBPROC) (GLsizei n, GLuint *buffers);
 388    typedef int (APIENTRY * PFNGLBUFFERDATAARBPROC) (GLenum target, int size, const GLvoid *data, GLenum usage);
 389    */
 390    typedef int (APIENTRY * PFNWGLCHOOSEPIXELFORMATARBPROC) ();
 391    typedef void * (APIENTRY * PFNWGLCREATEPBUFFERARBPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
 392    typedef HDC (APIENTRY * PFNWGLGETPBUFFERDCARBPROC) (void * hPbuffer);
 393    typedef int (APIENTRY * PFNWGLRELEASEPBUFFERDCARBPROC) (void * hPbuffer, HDC hDC);
 394    typedef BOOL (APIENTRY * PFNWGLDESTROYPBUFFERARBPROC) (void * hPbuffer);
 395    typedef BOOL (APIENTRY * PFNWGLQUERYPBUFFERARBPROC) (void * hPbuffer, int iAttribute, int *piValue);
 396    typedef const char * (APIENTRY * PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc);
 397    typedef BOOL (APIENTRY * PFNWGLBINDTEXIMAGEARBPROC) (void * hPbuffer, int iBuffer);
 398    typedef BOOL (APIENTRY * PFNWGLRELEASETEXIMAGEARBPROC) (void * hPbuffer, int iBuffer);
 399
 400    static PFNGLMAPBUFFERARBPROC glMapBufferARB = null;
 401    static PFNGLUNMAPBUFFERARBPROC glUnmapBufferARB = null;
 402    static PFNGLACTIVETEXTUREARBPROC glActiveTextureARB = null;
 403    static PFNGLMULTITEXCOORD2FARBPROC glMultiTexCoord2fARB = null;
 404    static PFNGLCLIENTACTIVETEXTUREARBPROC glClientActiveTextureARB = null;
 405    static PFNGLLOCKARRAYSEXTPROC glLockArraysEXT = null;
 406    static PFNGLUNLOCKARRAYSEXTPROC glUnlockArraysEXT = null;
 407    static PFNGLBLENDFUNCSEPARATEPROC glBlendFuncSeparate = null;
 408
 409    static PFNGLGENBUFFERSARBPROC glGenBuffersARB = null;
 410    static PFNGLBINDBUFFERARBPROC glBindBufferARB = null;
 411    static PFNGLBUFFERDATAARBPROC glBufferDataARB = null;
 412    static PFNGLDELETEBUFFERSARBPROC glDeleteBuffersARB = null;
 413    static PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB = null;
 414    static PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = null;
 415    static PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB = null;
 416    static PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB = null;
 417    static PFNWGLQUERYPBUFFERARBPROC wglQueryPbufferARB = null;
 418    static PFNWGLDESTROYPBUFFERARBPROC wglDestroyPbufferARB = null;
 419    static PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB = null;
 420    static PFNWGLBINDTEXIMAGEARBPROC wglBindTexImageARB = null;
 421    static PFNWGLRELEASETEXIMAGEARBPROC wglReleaseTexImageARB = null;
 422
 423    #define glBufferData glBufferDataARB
 424
 425    #ifdef WGL_WGLEXT_PROTOTYPES
 426    extern BOOL WINAPI wglSwapIntervalEXT (int);
 427    extern int WINAPI wglGetSwapIntervalEXT (void);
 428    #endif /* WGL_WGLEXT_PROTOTYPES */
 429    typedef BOOL (WINAPI * PFNWGLSWAPINTERVALEXTPROC) (int interval);
 430    typedef int (WINAPI * PFNWGLGETSWAPINTERVALEXTPROC) (void);
 431
 432    static PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT = NULL;
 433
 434 #elif defined(__ANDROID__) || defined(__ODROID__)
 435
 436    #define GL_FRAMEBUFFER           GL_FRAMEBUFFER_OES
 437    #define GL_RENDERBUFFER          GL_RENDERBUFFER_OES
 438    #define GL_COLOR_ATTACHMENT0     GL_COLOR_ATTACHMENT0_OES
 439
 440    #define GL_POLYGON_STIPPLE 0xFFFF
 441    #define GL_LINE_STIPPLE 0xFFFF
 442    #define GL_LINE 0xFFFF
 443    #define GL_FILL 0xFFFF
 444    #define GL_ALL_ATTRIB_BITS 0xFFFF
 445    #define GL_LIGHT_MODEL_LOCAL_VIEWER 0xFFFF
 446
 447    #define GL_POLYGON      9
 448    #define GL_QUADS        7
 449
 450    //#define GL_QUADS              0
 451    #define GL_QUAD_STRIP         0
 452    //#define GL_DOUBLE             0
 453    //#define GL_UNSIGNED_INT       0
 454    //#define GL_FILL               0
 455    //#define GL_LINE               0
 456    //#define GL_LINE_STIPPLE       0
 457    #define GL_BGRA_EXT           0
 458    #define GL_UNPACK_ROW_LENGTH  0
 459    #define GL_UNPACK_SKIP_PIXELS 0
 460    #define GL_UNPACK_SKIP_ROWS   0
 461    #define GL_RGBA8              0
 462    #define GL_PACK_ROW_LENGTH    0
 463    #define GL_PACK_SKIP_ROWS     0
 464    #define GL_PACK_SKIP_PIXELS   0
 465
 466 #endif
 467
 468 #if defined(ECERE_NO3D) || defined(ECERE_VANILLA)
 469 public union Matrix
 470 {
 471    double array[16];
 472    double m[4][4];
 473
 474    void Identity()
 475    {
 476       FillBytesBy4(this, 0, sizeof(Matrix) >> 2);
 477       m[0][0]=m[1][1]=m[2][2]=m[3][3]=1;
 478    }
 479
 480    void Transpose(Matrix source)
 481    {
 482       int i,j;
 483       for(i=0; i<4; i++)
 484          for(j=0; j<4; j++)
 485             m[j][i] = source.m[i][j];
 486    }
 487
 488    void Multiply(Matrix a, Matrix b)
 489    {
 490       // We need a full matrix multiplication for the Projection matrix
 491       m[0][0]=a.m[0][0]*b.m[0][0] + a.m[0][1]*b.m[1][0] + a.m[0][2]*b.m[2][0] + a.m[0][3]*b.m[3][0];
 492       m[0][1]=a.m[0][0]*b.m[0][1] + a.m[0][1]*b.m[1][1] + a.m[0][2]*b.m[2][1] + a.m[0][3]*b.m[3][1];
 493       m[0][2]=a.m[0][0]*b.m[0][2] + a.m[0][1]*b.m[1][2] + a.m[0][2]*b.m[2][2] + a.m[0][3]*b.m[3][2];
 494       m[0][3]=a.m[0][0]*b.m[0][3] + a.m[0][1]*b.m[1][3] + a.m[0][2]*b.m[2][3] + a.m[0][3]*b.m[3][3];
 495
 496       m[1][0]=a.m[1][0]*b.m[0][0] + a.m[1][1]*b.m[1][0] + a.m[1][2]*b.m[2][0] + a.m[1][3]*b.m[3][0];
 497       m[1][1]=a.m[1][0]*b.m[0][1] + a.m[1][1]*b.m[1][1] + a.m[1][2]*b.m[2][1] + a.m[1][3]*b.m[3][1];
 498       m[1][2]=a.m[1][0]*b.m[0][2] + a.m[1][1]*b.m[1][2] + a.m[1][2]*b.m[2][2] + a.m[1][3]*b.m[3][2];
 499       m[1][3]=a.m[1][0]*b.m[0][3] + a.m[1][1]*b.m[1][3] + a.m[1][2]*b.m[2][3] + a.m[1][3]*b.m[3][3];
 500
 501       m[2][0]=a.m[2][0]*b.m[0][0] + a.m[2][1]*b.m[1][0] + a.m[2][2]*b.m[2][0] + a.m[2][3]*b.m[3][0];
 502       m[2][1]=a.m[2][0]*b.m[0][1] + a.m[2][1]*b.m[1][1] + a.m[2][2]*b.m[2][1] + a.m[2][3]*b.m[3][1];
 503       m[2][2]=a.m[2][0]*b.m[0][2] + a.m[2][1]*b.m[1][2] + a.m[2][2]*b.m[2][2] + a.m[2][3]*b.m[3][2];
 504       m[2][3]=a.m[2][0]*b.m[0][3] + a.m[2][1]*b.m[1][3] + a.m[2][2]*b.m[2][3] + a.m[2][3]*b.m[3][3];
 505
 506       m[3][0]=a.m[3][0]*b.m[0][0] + a.m[3][1]*b.m[1][0] + a.m[3][2]*b.m[2][0] + a.m[3][3]*b.m[3][0];
 507       m[3][1]=a.m[3][0]*b.m[0][1] + a.m[3][1]*b.m[1][1] + a.m[3][2]*b.m[2][1] + a.m[3][3]*b.m[3][1];
 508       m[3][2]=a.m[3][0]*b.m[0][2] + a.m[3][1]*b.m[1][2] + a.m[3][2]*b.m[2][2] + a.m[3][3]*b.m[3][2];
 509       m[3][3]=a.m[3][0]*b.m[0][3] + a.m[3][1]*b.m[1][3] + a.m[3][2]*b.m[2][3] + a.m[3][3]*b.m[3][3];
 510    }
 511 };
 512 #endif
 513
 514 // Our own matrix stack
 515 static Matrix matrixStack[3][32];
 516 static int matrixIndex[3];
 517 static int curStack = 0;
 518
 519 #if defined(_GLES)
 520
 521    // OpenGL ES Porting Kit
 522 #if defined(__ANDROID__) || defined(__ODROID__)
 523    #define glBindFramebuffer        glBindFramebufferOES
 524    #define glBindRenderbuffer       glBindRenderbufferOES
 525    #define glFramebufferTexture2D   glFramebufferTexture2DOES
 526    #define glGenFramebuffers        glGenFramebuffersOES
 527    #define glGenRenderbuffers       glGenRenderbuffersOES
 528    #define glDeleteFramebuffers     glDeleteFramebuffersOES
 529    #define glDeleteRenderbuffers    glDeleteRenderbuffersOES
 530
 531    #define GL_INT                                  0x1404
 532    #define GL_UNSIGNED_INT                         0x1405
 533    #define GL_DOUBLE                               0x140A
 534    #define APIENTRY
 535 #endif
 536
 537    #define glDrawElementsi(type, count, start)  glDrawElements(type, count, GL_UNSIGNED_SHORT, start)
 538
 539    #define glBufferDatai         glesBufferDatai
 540    #define glBufferDatad         glesBufferDatad
 541    #define glVertexPointeri      glesVertexPointeri
 542    #define glVertexPointerd      glesVertexPointerd
 543
 544    #define glRecti               glesRecti
 545    #define glBegin               glesBegin
 546    #define glTexCoord2i          glesTexCoord2i
 547    #define glVertex2i            glesVertex2i
 548    #define glTexCoord2d          glesTexCoord2d
 549    #define glVertex2d            glesVertex2d
 550    #define glTexCoord2f          glesTexCoord2f
 551    #define glVertex2f            glesVertex2f
 552    #define glEnd                 glesEnd
 553    #define glColor3f             glesColor3f
 554    #define glColor4ub            glesColor4ub
 555    #define glColor4fv            glesColor4fv
 556    #define glLineStipple         glesLineStipple
 557    #define glNormal3fv           glesNormal3fv
 558    #define glNormal3f            glesNormal3f
 559    #define glTexCoord2fv         glesTexCoord2fv
 560    #define glColorMaterial       glesColorMaterial
 561
 562    #define glLoadMatrixd         glesLoadMatrixd
 563    #define glMultMatrixd         glesMultMatrixd
 564    #define glFrustum             glesFrustum
 565    #define glOrtho               glesOrtho
 566    #define glScaled              glesScaled
 567    #define glTranslated          glesTranslated
 568    #define glRotated             glesRotated
 569    #define glVertex3d            glesVertex3d
 570    #define glVertex3dv           glesVertex3dv
 571    #define glVertex3f            glesVertex3f
 572    #define glVertex3fv           glesVertex3fv
 573    #define glLightModeli         glesLightModeli
 574
 575 #else
 576
 577 #define glVertexPointerd(nc, s, p, nv)       glVertexPointer(nc, GL_DOUBLE, s, p)
 578 #define glDrawElementsi(type, count, start)  glDrawElements(type, count, GL_UNSIGNED_INT, start)
 579
 580 #endif
 581
 582 #if defined(__ANDROID__) || defined(__ODROID__)
 583    static EGLDisplay eglDisplay;
 584    static EGLSurface eglSurface;
 585    static EGLContext eglContext;
 586    static int eglWidth, eglHeight;
 587
 588 #if defined(__ANDROID__)
 589    static bool egl_init_display(ANativeWindow* window)
 590 #else
 591    static bool egl_init_display(uint window)
 592 #endif
 593    {
 594       const EGLint attribs[] =
 595       {
 596          EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 597          EGL_BLUE_SIZE, 8,
 598          EGL_GREEN_SIZE, 8,
 599          EGL_RED_SIZE, 8,
 600          EGL_DEPTH_SIZE, 16, //24,
 601          /*EGL_SAMPLE_BUFFERS, 1,
 602          EGL_SAMPLES, 0, //2,*/
 603          EGL_NONE
 604       };
 605       EGLint w, h, format;
 606       EGLint numConfigs;
 607       EGLConfig config;
 608       EGLSurface surface;
 609       EGLContext context;
 610
 611       EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
 612       eglInitialize(display, 0, 0);
 613       eglChooseConfig(display, attribs, &config, 1, &numConfigs);
 614       eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &format);
 615
 616       surface = eglCreateWindowSurface(display, config, window, null);
 617       context = eglCreateContext(display, config, null, null);
 618
 619       if(!eglMakeCurrent(display, surface, surface, context))
 620          return false;
 621
 622       eglQuerySurface(display, surface, EGL_WIDTH, &w);
 623       eglQuerySurface(display, surface, EGL_HEIGHT, &h);
 624
 625       eglDisplay = display;
 626       eglContext = context;
 627       eglSurface = surface;
 628       eglWidth = w;
 629       eglHeight = h;
 630
 631       glEnableClientState(GL_VERTEX_ARRAY);
 632       /*
 633       // Initialize GL state.
 634       glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
 635       glEnable(GL_CULL_FACE);
 636       glShadeModel(GL_SMOOTH);
 637       glDisable(GL_DEPTH_TEST);
 638       */
 639       glDisable(GL_CULL_FACE);
 640       glDisable(GL_DEPTH_TEST);
 641
 642       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 643       glEnable(GL_BLEND);
 644
 645       matrixStack[0][0].Identity();
 646       matrixStack[1][0].Identity();
 647       matrixStack[2][0].Identity();
 648
 649       glesMatrixMode(GL_MODELVIEW);
 650       glScaled(1.0, 1.0, -1.0);
 651       glesMatrixMode(GL_PROJECTION);
 652       glShadeModel(GL_FLAT);
 653
 654       glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 655       glFogi(GL_FOG_MODE, GL_EXP);
 656       glFogf(GL_FOG_DENSITY, 0);
 657       glEnable(GL_NORMALIZE);
 658       glDepthFunc(GL_LESS);
 659       glClearDepth(1.0);
 660       glDisable(GL_MULTISAMPLE_ARB);
 661
 662       glViewport(0,0,w,h);
 663       glesLoadIdentity();
 664       glOrtho(0,w,h,0,0.0,1.0);
 665
 666       curArrayBuffer = 0;
 667       curElementBuffer = 0;
 668       return true;
 669    }
 670
 671    static void egl_term_display()
 672    {
 673       if(stippleTexture)
 674       {
 675          glDeleteTextures(1, &stippleTexture);
 676          stippleTexture = 0;
 677       }
 678       if(eglDisplay != EGL_NO_DISPLAY)
 679       {
 680          eglMakeCurrent(eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
 681          if(eglContext != EGL_NO_CONTEXT)
 682             eglDestroyContext(eglDisplay, eglContext);
 683          if(eglSurface != EGL_NO_SURFACE)
 684             eglDestroySurface(eglDisplay, eglSurface);
 685          eglTerminate(eglDisplay);
 686       }
 687       eglDisplay = EGL_NO_DISPLAY;
 688       eglContext = EGL_NO_CONTEXT;
 689       eglSurface = EGL_NO_SURFACE;
 690    }
 691
 692 #endif
 693
 694 // OpenGL Immediate Mode Porting Kit
 695 static int beginCount;
 696 static int vertexCount;
 697 static int normalCount;
 698 static float *vertexPointer;
 699 static float *normalPointer;
 700 static GLenum beginMode = -1;
 701 static uint beginBufferSize, normalBufferSize;
 702 static int numVertexCoords = 2;
 703 static bool vertexColorValues = false;
 704 static int vertexStride = 4;
 705 static int vertexOffset = 2;
 706
 707 public void glesRecti(int a, int b, int c, int d)
 708 {
 709    glBegin(GL_QUADS);
 710    glVertex2i(a, b);
 711    glVertex2i(a, d);
 712    glVertex2i(c, d);
 713    glVertex2i(c, b);
 714    glEnd();
 715 }
 716
 717 public void glesBegin(GLenum mode)
 718 {
 719    beginMode = mode;
 720    beginCount = 0;
 721    vertexCount = 0;
 722    vertexColorValues = false;
 723    vertexOffset = 2;
 724    vertexStride = 4;
 725    numVertexCoords = 2;
 726
 727    if(!vertexPointer)
 728    {
 729       normalBufferSize = beginBufferSize = 1024;  // default number of vertices
 730       vertexPointer = new float[beginBufferSize * vertexStride];
 731       normalPointer = new float[normalBufferSize * 3];
 732    }
 733 }
 734
 735 public void glesTexCoord2f(float x, float y)
 736 {
 737    int count = vertexCount;
 738
 739    if(vertexCount + numVertexCoords > beginBufferSize)
 740    {
 741       beginBufferSize = beginBufferSize + beginBufferSize/2;
 742       vertexPointer = renew vertexPointer float[beginBufferSize * vertexStride];
 743    }
 744
 745    vertexPointer[count*vertexStride  ] = x;
 746    vertexPointer[count*vertexStride+1] = y;
 747    count++;
 748
 749    if(beginMode == GL_QUADS && ((beginCount % 4) == 3))
 750    {
 751       vertexPointer[count*vertexStride  ] = vertexPointer[(count-4)*vertexStride];
 752       vertexPointer[count*vertexStride+1] = vertexPointer[(count-4)*vertexStride+1];
 753       count++;
 754       vertexPointer[count*vertexStride  ] = vertexPointer[(count-3)*vertexStride];
 755       vertexPointer[count*vertexStride+1] = vertexPointer[(count-3)*vertexStride+1];
 756       count++;
 757    }
 758 }
 759 public void glesTexCoord2i(int x, int y)       { glesTexCoord2f((float)x, (float)y); }
 760 public void glesTexCoord2d(double x, double y) { glesTexCoord2f((float)x, (float)y); }
 761 public void glesTexCoord2fv(float * a)         { glesTexCoord2f(a[0], a[1]); }
 762
 763 public void glesVertex2f(float x, float y)
 764 {
 765    numVertexCoords = 2;
 766    vertexStride = vertexOffset + numVertexCoords;
 767
 768    if(vertexCount + 4 > beginBufferSize)
 769    {
 770       beginBufferSize = beginBufferSize + beginBufferSize/2;
 771       vertexPointer = renew vertexPointer float[beginBufferSize * vertexStride];
 772    }
 773
 774    vertexPointer[vertexCount*vertexStride+vertexOffset] = x;
 775    vertexPointer[vertexCount*vertexStride+vertexOffset + 1] = y;
 776    vertexCount++;
 777
 778    if(beginMode == GL_QUADS && ((beginCount % 4) == 3))
 779    {
 780       vertexPointer[vertexCount*vertexStride+vertexOffset] = vertexPointer[(vertexCount-4)*vertexStride+vertexOffset];
 781       vertexPointer[vertexCount*vertexStride+vertexOffset + 1] = vertexPointer[(vertexCount-4)*vertexStride+vertexOffset + 1];
 782       vertexCount++;
 783       vertexPointer[vertexCount*vertexStride+vertexOffset] = vertexPointer[(vertexCount-3)*vertexStride+vertexOffset];
 784       vertexPointer[vertexCount*vertexStride+vertexOffset + 1] = vertexPointer[(vertexCount-3)*vertexStride+vertexOffset + 1];
 785       vertexCount++;
 786    }
 787    beginCount++;
 788 }
 789 public void glesVertex2i(int x, int y)         { glesVertex2f((float)x, (float)y); }
 790 public void glesVertex2d(double x, double y)   { glesVertex2f((float)x, (float)y); }
 791
 792 public void glesEnd(void)
 793 {
 794    int mode = beginMode;
 795    if(mode == GL_QUADS)        mode = GL_TRIANGLES;
 796    else if(mode == GL_POLYGON) mode = GL_TRIANGLE_FAN;
 797
 798    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 799    noAB.use(texCoord, 2, GL_FLOAT, vertexStride * sizeof(float), vertexPointer);
 800    if(vertexColorValues)
 801    {
 802       glEnableClientState(GL_COLOR_ARRAY);
 803       noAB.use(color, 4, GL_FLOAT, vertexStride * sizeof(float), vertexPointer + 2);
 804    }
 805    noAB.use(vertex, numVertexCoords, GL_FLOAT, (vertexStride)*sizeof(float),vertexPointer+vertexOffset);
 806    if(normalCount && normalCount == vertexCount)
 807    {
 808       glEnableClientState(GL_NORMAL_ARRAY);
 809       noAB.use(normal, 3, GL_FLOAT, 3*sizeof(float),normalPointer);
 810    }
 811
 812    glDrawArrays(mode, 0, vertexCount);
 813    if(normalCount)
 814       glDisableClientState(GL_NORMAL_ARRAY);
 815    if(vertexColorValues)
 816       glDisableClientState(GL_COLOR_ARRAY);
 817    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 818    normalCount = 0;
 819    vertexColorValues = false;
 820    numVertexCoords = 2;
 821    beginMode = -1;
 822 }
 823
 824 // Vertex Pointer
 825 static float *floatVPBuffer = null;
 826 static short *shortVPBuffer = null;
 827 static unsigned int shortVPSize = 0, floatVPSize = 0;
 828
 829 // Buffer Data
 830 //static float *floatVPBuffer = null;  // For floats we reuse floatVPBuffer
 831 static unsigned short *shortBDBuffer = null;
 832 static unsigned int shortBDSize = 0/*, floatVPSize = 0*/;
 833
 834 public void glesVertexPointeri(int numCoords, int stride, int *pointer, int numVertices)
 835 {
 836    if(pointer)
 837    {
 838       int i;
 839       if(numVertices*numCoords > shortVPSize)
 840       {
 841          shortVPSize = numVertices*numCoords;
 842          shortVPBuffer = renew shortVPBuffer short[shortVPSize];
 843       }
 844       for(i = 0; i < numVertices*numCoords; i++)
 845          shortVPBuffer[i] = (short)pointer[i];
 846       glVertexPointer(numCoords, GL_SHORT, stride, shortVPBuffer);
 847    }
 848    else
 849       glVertexPointer(numCoords, GL_SHORT, stride, 0);
 850 }
 851
 852 public void glesVertexPointerd(int numCoords, int stride, double *pointer, int numVertices)
 853 {
 854    if(pointer)
 855    {
 856       int i;
 857       if(numVertices*numCoords > floatVPSize)
 858       {
 859          floatVPSize = numVertices*numCoords;
 860          floatVPBuffer = renew floatVPBuffer float[floatVPSize];
 861       }
 862       for(i = 0; i < numVertices*numCoords; i++)
 863          floatVPBuffer[i] = (float)pointer[i];
 864       glVertexPointer(numCoords, GL_FLOAT, stride, floatVPBuffer);
 865    }
 866    else
 867       glVertexPointer(numCoords, GL_FLOAT, stride, 0);
 868 }
 869
 870 public void glesTexReuseIntVP(int numCoords)
 871 {
 872    glTexCoordPointer(numCoords, GL_SHORT, 0, floatVPBuffer);
 873 }
 874
 875 public void glesTexReuseDoubleVP(int numCoords)
 876 {
 877    glTexCoordPointer(numCoords, GL_FLOAT, 0, floatVPBuffer);
 878 }
 879
 880 public void glesColor4f(float r, float g, float b, float a)
 881 {
 882    if(beginMode != (GLenum)-1)
 883    {
 884       int count = vertexCount;
 885
 886       vertexColorValues = true;
 887       vertexOffset = 6;
 888       vertexStride = vertexOffset + numVertexCoords;
 889
 890       if(vertexCount + vertexStride > beginBufferSize)
 891       {
 892          beginBufferSize = beginBufferSize + beginBufferSize/2;
 893          vertexPointer = renew vertexPointer float[beginBufferSize * vertexStride];
 894       }
 895
 896       vertexPointer[count*vertexStride + 2] = r;
 897       vertexPointer[count*vertexStride + 3] = g;
 898       vertexPointer[count*vertexStride + 4] = b;
 899       vertexPointer[count*vertexStride + 5] = a;
 900       count++;
 901
 902       if(beginMode == GL_QUADS && ((beginCount % 4) == 3))
 903       {
 904          vertexPointer[count*vertexStride + 2] = vertexPointer[(count-4) * vertexStride + 2];
 905          vertexPointer[count*vertexStride + 3] = vertexPointer[(count-4) * vertexStride + 3];
 906          vertexPointer[count*vertexStride + 4] = vertexPointer[(count-4) * vertexStride + 4];
 907          vertexPointer[count*vertexStride + 5] = vertexPointer[(count-4) * vertexStride + 5];
 908          count++;
 909          vertexPointer[count*vertexStride + 2] = vertexPointer[(count-3) * vertexStride + 2];
 910          vertexPointer[count*vertexStride + 3] = vertexPointer[(count-3) * vertexStride + 3];
 911          vertexPointer[count*vertexStride + 4] = vertexPointer[(count-3) * vertexStride + 4];
 912          vertexPointer[count*vertexStride + 5] = vertexPointer[(count-3) * vertexStride + 5];
 913          count++;
 914       }
 915    }
 916    else
 917       glColor4f(r, g, b, a);
 918 }
 919
 920 public void glesColor3f( float r, float g, float b )
 921 {
 922    glesColor4f(r, g, b, 1.0f);
 923 }
 924
 925 public void glesColor4ub(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
 926 {
 927    glesColor4f(r/255.0f, g/255.0f, b/255.0f, a/255.0f);
 928 }
 929
 930 public void glesColor4fv(float * a)
 931 {
 932    glesColor4f(a[0], a[1], a[2], a[3]);
 933 }
 934
 935 public void glesBufferDatad(int target, int size, void * data, int usage)
 936 {
 937    int numElems = size/sizeof(double);
 938    double * dblPtr = (double *)data;
 939    int i;
 940    if (numElems > floatVPSize)
 941    {
 942       floatVPSize = numElems;
 943       floatVPBuffer = renew floatVPBuffer float[floatVPSize];
 944    }
 945    for (i=0; i< numElems; i++)
 946       floatVPBuffer[i] = (float)dblPtr[i];
 947
 948    glBufferData(target, numElems*sizeof(float), floatVPBuffer, usage);
 949 }
 950
 951 public void glesBufferDatai(int target, int size, void * data, int usage)
 952 {
 953    int numElems = size/sizeof(unsigned int);
 954    unsigned int * pointer = (unsigned int *)data;
 955    int i;
 956    if (numElems > shortBDSize)
 957    {
 958       shortBDSize = numElems;
 959       shortBDBuffer = renew shortBDBuffer uint16[shortBDSize];
 960    }
 961    for (i=0; i< numElems; i++)
 962       shortBDBuffer[i] = (unsigned short)pointer[i];
 963
 964    glBufferData(target, numElems*sizeof(unsigned short), shortBDBuffer, usage);
 965 }
 966
 967 // *** Our Custom Matrix Stack ***
 968
 969 static void LoadCurMatrix()
 970 {
 971    double * i = matrixStack[curStack][matrixIndex[curStack]].array;
 972    float m[16] =
 973    {
 974       (float)i[0],(float)i[1],(float)i[2],(float)i[3],
 975       (float)i[4],(float)i[5],(float)i[6],(float)i[7],
 976       (float)i[8],(float)i[9],(float)i[10],(float)i[11],
 977       (float)i[12],(float)i[13],(float)i[14],(float)i[15]
 978    };
 979    glLoadMatrixf(m);
 980 }
 981
 982 public void glesLoadIdentity()
 983 {
 984    matrixStack[curStack][matrixIndex[curStack]].Identity();
 985    LoadCurMatrix();
 986 }
 987
 988 public void glesPushMatrix()
 989 {
 990    if(matrixIndex[curStack] + 1 < sizeof(matrixStack[0]) / sizeof(Matrix))
 991    {
 992       matrixIndex[curStack]++;
 993       memcpy(matrixStack[curStack][matrixIndex[curStack]].array, matrixStack[curStack][matrixIndex[curStack]-1].array, sizeof(Matrix));
 994    }
 995 }
 996
 997 public void glesPopMatrix()
 998 {
 999    if(matrixIndex[curStack] > 0)
1000    {
1001       matrixIndex[curStack]--;
1002       LoadCurMatrix();
1003    }
1004 }
1005
1006 public void glesLoadMatrixd(double * i)
1007 {
1008    memcpy(matrixStack[curStack][matrixIndex[curStack]].array, i, sizeof(Matrix));
1009    LoadCurMatrix();
1010 }
1011
1012 public void glesOrtho( double l, double r, double b, double t, double n, double f )
1013 {
1014    Matrix m
1015    { {
1016       (2 / (r - l)), 0, 0, 0,
1017       0, (2 / (t - b)), 0, 0,
1018       0, 0, (-2 / (f - n)), 0,
1019       (-(r + l) / (r - l)), (-(t + b) / (t - b)), (-(f + n) / (f - n)), 1
1020    } };
1021    Matrix res;
1022    res.Multiply(m, matrixStack[curStack][matrixIndex[curStack]]);
1023    matrixStack[curStack][matrixIndex[curStack]] = res;
1024    LoadCurMatrix();
1025 }
1026
1027 public void glesFrustum( double l, double r, double b, double t, double n, double f )
1028 {
1029    nearPlane = n;
1030    n = 1;
1031    l /= nearPlane;
1032    r /= nearPlane;
1033    b /= nearPlane;
1034    t /= nearPlane;
1035    f /= nearPlane;
1036    {
1037       double A = ((r + l) / (r - l));
1038       double B = ((t + b) / (t - b));
1039       double C = (-(f + n) / (f - n));
1040       double D = (-2*f*n/(f-n));
1041       Matrix m
1042       { {
1043          (2.0*n / (r - l)), 0, 0, 0,
1044          0, (2.0*n / (t - b)), 0, 0,
1045          A, B,             C,-1,
1046          0, 0,             D, 0
1047       } };
1048       Matrix res;
1049       res.Multiply(m, matrixStack[curStack][matrixIndex[curStack]]);
1050       matrixStack[curStack][matrixIndex[curStack]] = res;
1051       LoadCurMatrix();
1052    }
1053 }
1054
1055 #if !defined(ECERE_NO3D) && !defined(ECERE_VANILLA)
1056 public void glesRotated( double a, double b, double c, double d )
1057 {
1058    Quaternion q;
1059    Matrix m, r;
1060
1061    q.RotationAxis({(float)b,(float)c,(float)-d}, a );
1062    m.RotationQuaternion(q);
1063    r.Multiply(m, matrixStack[curStack][matrixIndex[curStack]]);
1064    matrixStack[curStack][matrixIndex[curStack]] = r;
1065    LoadCurMatrix();
1066 }
1067 public void glesScaled( double a, double b, double c )
1068 {
1069    Matrix m, r;
1070
1071    m.Identity();
1072    m.Scale(a,b,c);
1073    r.Multiply(m, matrixStack[curStack][matrixIndex[curStack]]);
1074    matrixStack[curStack][matrixIndex[curStack]] = r;
1075    LoadCurMatrix();
1076 }
1077
1078 public void glesTranslated( double a, double b, double c )
1079 {
1080    Matrix m, r;
1081
1082    m.Identity();
1083    m.Translate(a,b,c);
1084    r.Multiply(m, matrixStack[curStack][matrixIndex[curStack]]);
1085    matrixStack[curStack][matrixIndex[curStack]] = r;
1086    LoadCurMatrix();
1087 }
1088
1089 public void glesMultMatrixd( double * i )
1090 {
1091    Matrix r;
1092    r.Multiply((Matrix *)i, matrixStack[curStack][matrixIndex[curStack]]);
1093    matrixStack[curStack][matrixIndex[curStack]] = r;
1094    LoadCurMatrix();
1095 }
1096 #endif
1097
1098 public void glesMatrixMode(int mode)
1099 {
1100    curStack = (mode == GL_MODELVIEW) ? 0 : (mode == GL_PROJECTION) ? 1 : 2;
1101    glMatrixMode(mode);
1102 }
1103
1104 #if defined(_GLES)
1105
1106 #define glPushMatrix          glesPushMatrix
1107 #define glPopMatrix           glesPopMatrix
1108 #define glLoadIdentity        glesLoadIdentity
1109 #define glMatrixMode          glesMatrixMode
1110
1111 #endif
1112
1113 /* Using the built-in matrix stack
1114 void glesLoadMatrixd( double * i )
1115 {
1116    float m[16] =
1117    {
1118       (float)i[0],(float)i[1],(float)i[2],(float)i[3],
1119       (float)i[4],(float)i[5],(float)i[6],(float)i[7],
1120       (float)i[8],(float)i[9],(float)i[10],(float)i[11],
1121       (float)i[12],(float)i[13],(float)i[14],(float)i[15]
1122    };
1123    glLoadMatrixf(m);
1124 }
1125
1126 void glesOrtho( double l, double r, double b, double t, double n, double f )
1127 {
1128    float matrix[4][4] =
1129    {
1130       { (float)(2 / (r - l)), 0, 0, 0 },
1131       { 0, (float)(2 / (t - b)), 0, 0 },
1132       { 0, 0, (float)(-2 / (f - n)), 0 },
1133       { (float)(-(r + l) / (r - l)), (float)(-(t + b) / (t - b)), (float)(-(f + n) / (f - n)), 1 }
1134    };
1135    glMultMatrixf((float *)matrix);
1136 }
1137
1138 void glesFrustum( double l, double r, double b, double t, double n, double f )
1139 {
1140    float A = (float)((r + l) / (r - l));
1141    float B = (float)((t + b) / (t - b));
1142    float C = (float)(-(f + n) / (f - n));
1143    float D = (float)(-2*f*n/(f-n));
1144    float matrix[4][4] =
1145    {
1146       { (float)(2*n / (r - l)), 0, 0, 0 },
1147       { 0, (float)(2*n / (t - b)), 0, 0 },
1148       { A, B,             C,-1 },
1149       { 0, 0,             D, 0 }
1150    };
1151    glMultMatrixf((float *)matrix);
1152 }
1153
1154 void glesRotated( double a, double b, double c, double d ) { glRotatef((float)a, (float)b, (float)c, (float)d); }
1155 void glesScaled( double a, double b, double c ) { glScalef((float)a, (float)b, (float)c); }
1156 void glesTranslated( double a, double b, double c ) { glTranslatef((float)a, (float)b, (float)c); }
1157
1158 void glesMultMatrixd( double * i )
1159 {
1160    float m[16] =
1161    {
1162       (float)i[0], (float)i[1], (float)i[2], (float)i[3],
1163       (float)i[4], (float)i[5], (float)i[6], (float)i[7],
1164       (float)i[8], (float)i[9], (float)i[10], (float)i[11],
1165       (float)i[12], (float)i[13], (float)i[14], (float)i[15]
1166    };
1167    glMultMatrixf(m);
1168 }
1169 */
1170
1171 // Need to do these...
1172 public void glesVertex3f( float x, float y, float z )
1173 {
1174    numVertexCoords = 3;
1175    vertexStride = vertexOffset + numVertexCoords;
1176
1177    if(vertexCount + vertexStride > beginBufferSize)
1178    {
1179       beginBufferSize = beginBufferSize + beginBufferSize/2;
1180       vertexPointer = renew vertexPointer float[beginBufferSize * vertexStride];
1181    }
1182
1183    vertexPointer[vertexCount*vertexStride+vertexOffset] = x;
1184    vertexPointer[vertexCount*vertexStride+vertexOffset+1] = y;
1185    vertexPointer[vertexCount*vertexStride+vertexOffset+2] = z;
1186    vertexCount++;
1187
1188    if(beginMode == GL_QUADS && ((beginCount % 4) == 3))
1189    {
1190       vertexPointer[vertexCount*vertexStride+vertexOffset] = vertexPointer[(vertexCount-4)*vertexStride+vertexOffset];
1191       vertexPointer[vertexCount*vertexStride+vertexOffset+1] = vertexPointer[(vertexCount-4)*vertexStride+vertexOffset+1];
1192       vertexPointer[vertexCount*vertexStride+vertexOffset+2] = vertexPointer[(vertexCount-4)*vertexStride+vertexOffset+2];
1193       vertexCount++;
1194       vertexPointer[vertexCount*vertexStride+vertexOffset] = vertexPointer[(vertexCount-3)*vertexStride+vertexOffset];
1195       vertexPointer[vertexCount*vertexStride+vertexOffset+1] = vertexPointer[(vertexCount-3)*vertexStride+vertexOffset+1];
1196       vertexPointer[vertexCount*vertexStride+vertexOffset+2] = vertexPointer[(vertexCount-3)*vertexStride+vertexOffset+2];
1197       vertexCount++;
1198    }
1199    beginCount++;
1200 }
1201
1202 public void glesVertex3d( double x, double y, double z )  { glesVertex3f((float)x, (float)y, (float)z); }
1203 public void glesVertex3fv( float* coords )                { glesVertex3f(coords[0], coords[1], coords[2]); }
1204 public void glesVertex3dv( double* coords )               { glesVertex3f((float)coords[0], (float)coords[1], (float)coords[2]); }
1205
1206 public void glesNormal3f(float x, float y, float z)
1207 {
1208    normalCount = vertexCount;
1209    if(vertexCount + 4 > normalBufferSize)
1210    {
1211       normalBufferSize = normalBufferSize + normalBufferSize/2;
1212       normalPointer = renew normalPointer float[normalBufferSize * 2];
1213    }
1214
1215    normalPointer[normalCount*3+0] = x;
1216    normalPointer[normalCount*3+1] = y;
1217    normalPointer[normalCount*3+2] = z;
1218    normalCount++;
1219
1220    if(beginMode == GL_QUADS && ((beginCount % 4) == 3))
1221    {
1222       normalPointer[normalCount*3+0] = normalPointer[(normalCount-4)*3+0];
1223       normalPointer[normalCount*3+1] = normalPointer[(normalCount-4)*3+1];
1224       normalPointer[normalCount*3+2] = normalPointer[(normalCount-4)*3+2];
1225       normalCount++;
1226       normalPointer[normalCount*3+0] = normalPointer[(normalCount-3)*3+0];
1227       normalPointer[normalCount*3+1] = normalPointer[(normalCount-3)*3+1];
1228       normalPointer[normalCount*3+2] = normalPointer[(normalCount-3)*3+2];
1229       normalCount++;
1230    }
1231 }
1232 public void glesNormal3fd(double x, double y, double z)         { glesNormal3f((float)x, (float)y, (float)z); }
1233 public void glesNormal3fv(float * coords)                       { glesNormal3f(coords[0], coords[1], coords[2]); }
1234
1235 public void glesColorMaterial(int a, int b)
1236 {
1237    PrintLn("glColorMaterial stub");
1238 }
1239
1240 public void glesTerminate()
1241 {
1242    delete vertexPointer;
1243    delete normalPointer;
1244    beginBufferSize = 0;
1245
1246    delete floatVPBuffer;
1247    shortVPSize = 0;
1248
1249    delete shortVPBuffer;
1250    floatVPSize = 0;
1251
1252    delete shortBDBuffer;
1253    shortBDSize = 0;
1254 }
1255
1256 static GLuint stippleTexture;
1257 #if defined(_GLES) || defined(EM_MODE)
1258 static bool stippleEnabled;
1259 #endif
1260
1261 public void glesLineStipple( int i, unsigned short j )
1262 {
1263    uint texture[1*16];
1264    int x;
1265    for(x = 0; x < 16; x++)
1266    {
1267       bool v = (j & (1 << x)) != 0;
1268       texture[x] = v ? 0xFFFFFFFF : 0;
1269    }
1270    if(!stippleTexture)
1271       glGenTextures(1, &stippleTexture);
1272    glBindTexture(GL_TEXTURE_2D, stippleTexture);
1273    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, texture);
1274    glEnable(GL_TEXTURE_2D);
1275    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
1276    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
1277    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
1278    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1279    glMatrixMode(GL_TEXTURE);
1280    glLoadIdentity();
1281    //glTranslated(1.0/backAttrib->texW/2.0f, 1.0/backAttrib->texH/2.0f, 0.0f);
1282    glScaled(i/16.0, 1, 1.0f);
1283    glTranslated(0.5, 0.5, 0);
1284    glMatrixMode(GL_PROJECTION);
1285 }
1286
1287 public void glesLightModeli( unsigned int pname, int param )
1288 {
1289 #if !defined(EM_MODE)
1290    if(pname == GL_LIGHT_MODEL_TWO_SIDE)
1291       glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, param);
1292 #endif
1293 }
1294
1295 #if defined(__ANDROID__) || defined(__ODROID__)
1296 void glClearDepth( double depth ) { glClearDepthf((float)depth); }
1297 void glFogi( unsigned int pname, int param ) { }
1298 void glPolygonMode( unsigned int i, unsigned int j ) { }
1299
1300
1301 // *** Picking won't be supported for now ***
1302 void glPushName( unsigned int i ) { }
1303 void glLoadName( unsigned int i ) { }
1304 void glPopName() { }
1305
1306 // Probably replace by regular glBlendFunc ...
1307 void glBlendFuncSeparate(int a, int b, int c, int d)
1308 {
1309    glBlendFunc(a, b);
1310 }
1311
1312 // For direct pixel blitting...
1313 void glRasterPos2d(double a, double b) { }
1314 void glPixelZoom(float a, float b) { }
1315 void glDrawPixels(int a, int b, int c, int d, void * e) { }
1316
1317 #endif
1318
1319 #if !defined(__APPLE__) && !defined(__WIN32__) && !defined(__ODROID__)
1320 void (APIENTRY * glBindBufferARB) (GLenum target, GLuint buffer);
1321 void (APIENTRY * glGenBuffersARB) (GLsizei n, GLuint *buffers);
1322 void (APIENTRY * glDeleteBuffersARB) (GLsizei n, const GLuint *buffers);
1323 void (APIENTRY * glBufferDataARB) (GLenum target, int size, const GLvoid *data, GLenum usage);
1324 #endif
1325
1326 public void GLLoadMatrix(Matrix matrix)
1327 {
1328    float m[16] =
1329    {
1330       (float)matrix.m[0][0], (float)matrix.m[0][1], (float)matrix.m[0][2], (float)matrix.m[0][3],
1331       (float)matrix.m[1][0], (float)matrix.m[1][1], (float)matrix.m[1][2], (float)matrix.m[1][3],
1332       (float)matrix.m[2][0], (float)matrix.m[2][1], (float)matrix.m[2][2], (float)matrix.m[2][3],
1333       (float)matrix.m[3][0], (float)matrix.m[3][1], (float)matrix.m[3][2], (float)matrix.m[3][3]
1334    };
1335    glLoadMatrixf(m);
1336 }
1337
1338 public enum GLBufferContents { vertex, normal, texCoord, color };
1339
1340 public define noAB = GLAB { 0 };
1341
1342 static uint curArrayBuffer;
1343
1344 public struct GLAB
1345 {
1346    uint buffer;
1347
1348    void upload(uint size, void * data)
1349    {
1350       if(this != null)
1351       {
1352          if(!buffer)
1353             GLGenBuffers(1, this);
1354          if(curArrayBuffer != buffer)
1355             GLBindBuffer(GL_ARRAY_BUFFER, buffer);
1356          glBufferData(GL_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);  //GL_DYNAMIC_DRAW);
1357       }
1358    }
1359
1360    void free()
1361    {
1362       if(this != null)
1363       {
1364          GLDeleteBuffers(1, this);
1365          buffer = 0;
1366       }
1367    }
1368
1369    void use(GLBufferContents contents, int n, int type, uint stride, void * pointer)
1370    {
1371       if(curArrayBuffer != ((this != null) ? buffer : 0))
1372          GLBindBuffer(GL_ARRAY_BUFFER, ((this != null) ? buffer : 0));
1373       switch(contents)
1374       {
1375          case normal:   glNormalPointer(type, stride, pointer); break;
1376          case vertex:   glVertexPointer(n, type, stride, pointer); break;
1377          case texCoord: glTexCoordPointer(n, type, stride, pointer); break;
1378          case color:    glColorPointer(n, type, stride, pointer); break;
1379       }
1380    }
1381
1382    void useVertTrans(uint count, int n, int type, uint stride, void * pointer)
1383    {
1384 #ifdef _GLES
1385       if(curArrayBuffer != ((this != null) ? buffer : 0))
1386          GLBindBuffer(GL_ARRAY_BUFFER, ((this != null) ? buffer : 0));
1387       if(type == GL_INT)
1388          glVertexPointeri(n, stride, pointer, count);
1389       else if(type == GL_DOUBLE)
1390          glVertexPointerd(n, stride, pointer, count);
1391 #else
1392       use(vertex, n, type, stride, pointer);
1393 #endif
1394    }
1395 };
1396
1397 static uint curElementBuffer;
1398
1399 public define noEAB = GLEAB { 0 };
1400
1401 public struct GLEAB
1402 {
1403    uint buffer;
1404
1405    void upload(uint size, void * data)
1406    {
1407       if(this != null)
1408       {
1409          if(!buffer)
1410             GLGenBuffers(1, (GLAB *)this);
1411
1412          if(curElementBuffer != buffer)
1413             GLBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffer);
1414          glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);  //GL_DYNAMIC_DRAW);
1415       }
1416    }
1417
1418    void free()
1419    {
1420       if(this != null)
1421       {
1422          GLDeleteBuffers(1, (GLAB *)this);
1423          buffer = 0;
1424       }
1425    }
1426
1427    void draw(int primType, int count, int type, void * indices)
1428    {
1429       if(curElementBuffer != ((this != null) ? buffer : 0))
1430          GLBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ((this != null) ? buffer : 0));
1431       glDrawElements(primType, count, type, indices);
1432    }
1433 };
1434
1435 public void GLGenBuffers(int count, GLAB * buffers)
1436 {
1437 #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
1438    glGenBuffers(count, (GLuint *)buffers);
1439 #else
1440 #if defined(__WIN32__)
1441    if(glGenBuffersARB)
1442 #endif
1443       glGenBuffersARB(count, (GLuint *)buffers);
1444 #endif
1445 }
1446
1447 public void GLDeleteBuffers(int count, GLAB * buffers)
1448 {
1449    int i;
1450    for(i = 0; i < count; i++)
1451    {
1452       uint buffer = buffers[i].buffer;
1453       if(buffer == curArrayBuffer)
1454          GLBindBuffer(GL_ARRAY_BUFFER_ARB, 0);
1455       else if(buffer == curElementBuffer)
1456          GLBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
1457    }
1458 #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
1459    glDeleteBuffers(count, (GLuint *)buffers);
1460 #else
1461 #if defined(__WIN32__)
1462    if(glDeleteBuffersARB)
1463 #endif
1464       glDeleteBuffersARB(count, (GLuint *)buffers);
1465 #endif
1466 }
1467
1468 void GLBindBuffer(int target, uint buffer)
1469 {
1470 #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
1471    glBindBuffer(target, buffer);
1472 #else
1473 #if defined(__WIN32__)
1474    if(glBindBufferARB)
1475 #endif
1476       glBindBufferARB(target, buffer);
1477 #endif
1478    if(target == GL_ARRAY_BUFFER_ARB)
1479       curArrayBuffer = buffer;
1480    else if(target == GL_ELEMENT_ARRAY_BUFFER_ARB)
1481       curElementBuffer = buffer;
1482 }
1483
1484 public void GLVertexPointer(int numCoords, int glType, int stride, void *ptr, int numVertices)
1485 {
1486 #ifdef _GLES
1487    if(glType == GL_DOUBLE)
1488       glesVertexPointerd(numCoords, stride, ptr, numVertices);
1489    else if(glType == GL_INT)
1490       glesVertexPointeri(numCoords, stride, ptr, numVertices);
1491    else
1492 #endif
1493       glVertexPointer(numCoords, glType, stride, ptr);
1494 }
1495
1496 public void GLBufferData(int type, GLenum target, int size, const GLvoid *data, GLenum usage)
1497 {
1498 #ifdef _GLES
1499    if(type == GL_DOUBLE)
1500       glesBufferDatad(target, size, (void *)data, usage);
1501    else if(type == GL_UNSIGNED_INT)
1502       glesBufferDatai(target, size, (void *)data, usage);
1503    else
1504 #endif
1505
1506 #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
1507       glBufferData(target, size, data, usage);
1508 #else
1509
1510 #if defined(__WIN32__)
1511    if(glBufferDataARB)
1512 #endif
1513       glBufferDataARB(target, size, data, usage);
1514 #endif
1515 }
1516
1517 #if !defined(ECERE_NO3D) && !defined(ECERE_VANILLA)
1518 static int primitiveTypes[RenderPrimitiveType] =
1519 {
1520    GL_POINTS, GL_LINES, GL_TRIANGLES, GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_QUADS, GL_QUAD_STRIP, GL_LINE_STRIP
1521 };
1522 #endif
1523
1524
1525 // Non OpenGL ES friendly stuff
1526
1527 #if defined(_GLES)
1528
1529 //#undef GL_UNSIGNED_INT
1530 //#undef GL_DOUBLE
1531 #undef GL_INT
1532 //#undef GL_POLYGON
1533 //#undef GL_QUADS
1534 #undef GL_QUAD_STRIP
1535 #undef GL_POLYGON_STIPPLE
1536 #undef GL_LINE_STIPPLE
1537 #undef GL_LINE
1538 #undef GL_FILL
1539 #undef GL_ALL_ATTRIB_BITS
1540 #undef GL_LIGHT_MODEL_LOCAL_VIEWER
1541
1542 #endif
1543
1544 static int displayWidth, displayHeight;
1545
1546 #define GL_CLAMP_TO_EDGE 0x812F
1547
1548 static bool vboAvailable;
1549
1550 static bool useSingleGLContext = false;
1551 class OGLDisplay : struct
1552 {
1553 #if defined(__WIN32__)
1554    HDC hdc;
1555    HGLRC glrc;
1556
1557    HBITMAP memBitmap;
1558    HDC memDC;
1559    byte * picture;
1560    uint stride;
1561    void * pBuffer;
1562    /*
1563    int imageBuffers[2];
1564    byte * pboMemory1, * pboMemory2;
1565    */
1566 #elif !defined(__ANDROID__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
1567    GLXContext glContext;
1568
1569    Pixmap pixmap;
1570    XShmSegmentInfo shminfo;
1571    XImage * image;
1572    XShmSegmentInfo shminfoShape;
1573    XImage * shapeImage;
1574    byte * picture;
1575    uint stride;
1576    GLXPbuffer pBuffer;
1577    X11Picture windowPicture;
1578    X11Picture pixmapPicture;
1579    Pixmap shapePixmap;
1580    X11Picture shapePicture;
1581 #endif
1582
1583    ColorAlpha * flippingBuffer;
1584    int flipBufH, flipBufW;
1585    bool depthWrite;
1586    int x, y;
1587 };
1588
1589 class OGLSystem : struct
1590 {
1591    int maxTextureSize;
1592    bool loadingFont;
1593    bool pow2textures;
1594 #if defined(__WIN32__)
1595    PIXELFORMATDESCRIPTOR pfd;
1596    int format;
1597    HDC hdc;
1598    HGLRC glrc;
1599    HWND hwnd;
1600 #elif !defined(__ANDROID__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
1601    XVisualInfo * visualInfo;
1602    GLXContext glContext;
1603    GLXDrawable glxDrawable;
1604 #endif
1605 };
1606
1607 class OGLSurface : struct
1608 {
1609    Font font;
1610    bool opaqueText;
1611    int xOffset;
1612    bool writingText;
1613    bool writingOutline;
1614
1615    float foreground[4], background[4], bitmapMult[4];
1616 } OGLSurface;
1617
1618 class OGLMesh : struct
1619 {
1620    GLAB vertices;
1621    GLAB normals;
1622    GLAB texCoords;
1623    GLAB texCoords2;
1624    GLAB colors;
1625 };
1626
1627 class OGLIndices : struct
1628 {
1629    uint16 * indices;
1630    GLEAB buffer;
1631    uint nIndices;
1632 };
1633
1634 int current;
1635 void * previous;
1636
1637 class OpenGLDisplayDriver : DisplayDriver
1638 {
1639    class_property(name) = "OpenGL";
1640
1641    bool LockSystem(DisplaySystem displaySystem)
1642    {
1643 #if !defined(__ANDROID__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
1644       OGLSystem oglSystem = displaySystem.driverData;
1645       if(useSingleGLContext) return true;
1646    #if defined(__WIN32__)
1647       wglMakeCurrent(oglSystem.hdc, oglSystem.glrc);
1648    #elif defined(__unix__) || defined(__APPLE__)
1649       //if(previous) return true;
1650       // printf("Making SYSTEM current\n");
1651       glXMakeCurrent(xGlobalDisplay, (GLXDrawable)oglSystem.glxDrawable, oglSystem.glContext);
1652       //previous = oglSystem.glContext;
1653    #endif
1654 #endif
1655       return true;
1656    }
1657
1658    void UnlockSystem(DisplaySystem displaySystem)
1659    {
1660       if(useSingleGLContext) return;
1661    #if defined(__WIN32__)
1662       wglMakeCurrent(null, null);
1663    #elif defined(__unix__) || defined(__APPLE__)
1664       // printf("Making NULL current\n");
1665       #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
1666       #else
1667       glXMakeCurrent(xGlobalDisplay, None, null);
1668       #endif
1669       // previous = null;
1670    #endif
1671    }
1672
1673    bool Lock(Display display)
1674    {
1675 #if !defined(__ANDROID__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
1676       OGLDisplay oglDisplay = display.driverData;
1677       if(useSingleGLContext) return true;
1678    #if defined(__WIN32__)
1679       wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
1680    #elif defined(__unix__) || defined(__APPLE__)
1681       // if(previous) glXMakeCurrent(xGlobalDisplay, None, null);
1682       // printf("   Making DISPLAY current\n");
1683       glXMakeCurrent(xGlobalDisplay, (GLXDrawable)display.window, oglDisplay.glContext);
1684    #endif
1685 #endif
1686       return true;
1687    }
1688
1689    void Unlock(Display display)
1690    {
1691       if(useSingleGLContext) return;
1692       //printf("   Making NULL current\n");
1693       //glXMakeCurrent(xGlobalDisplay, None, null);
1694       // if(previous)
1695          LockSystem(display.displaySystem);
1696    }
1697
1698    void DestroyDisplay(Display display)
1699    {
1700       OGLDisplay oglDisplay = display.driverData;
1701
1702       if(oglDisplay)
1703       {
1704    #if defined(__WIN32__)
1705          wglMakeCurrent( null, null );
1706
1707          if(oglDisplay.glrc)
1708             wglDeleteContext(oglDisplay.glrc);
1709
1710          if(oglDisplay.hdc && oglDisplay.pBuffer)
1711             wglReleasePbufferDCARB(oglDisplay.pBuffer, oglDisplay.hdc);
1712
1713          if(oglDisplay.pBuffer)
1714             wglDestroyPbufferARB(oglDisplay.pBuffer);
1715
1716          if(oglDisplay.hdc)
1717             ReleaseDC(display.window, oglDisplay.hdc);
1718
1719          if(oglDisplay.memDC) DeleteDC(oglDisplay.memDC);
1720          if(oglDisplay.memBitmap) DeleteObject(oglDisplay.memBitmap);
1721
1722    #elif defined(__unix__) || defined(__APPLE__)
1723       #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
1724       #else
1725          if(oglDisplay.shapePixmap)
1726             XFreePixmap(xGlobalDisplay, oglDisplay.shapePixmap);
1727          if(oglDisplay.pixmap)
1728             XFreePixmap(xGlobalDisplay, oglDisplay.pixmap);
1729          if(oglDisplay.image)
1730          {
1731             if(oglDisplay.shminfoShape.shmid != -1)
1732             {
1733                XShmDetach(xGlobalDisplay, &oglDisplay.shminfo);
1734                if(oglDisplay.shminfo.shmaddr != (void *)-1)
1735                   shmdt(oglDisplay.shminfo.shmaddr);
1736                shmctl(oglDisplay.shminfo.shmid, IPC_RMID, 0);
1737             }
1738          }
1739          if(oglDisplay.shapeImage)
1740          {
1741             if(oglDisplay.shminfoShape.shmid != -1)
1742             {
1743                XShmDetach(xGlobalDisplay, &oglDisplay.shminfoShape);
1744                if(oglDisplay.shminfoShape.shmaddr != (void *)-1)
1745                   shmdt(oglDisplay.shminfoShape.shmaddr);
1746                shmctl(oglDisplay.shminfoShape.shmid, IPC_RMID, 0);
1747             }
1748             XDestroyImage(oglDisplay.shapeImage);
1749             oglDisplay.shapeImage = None;
1750          }
1751
1752          glXMakeCurrent(xGlobalDisplay, None, null);
1753
1754          if(oglDisplay.glContext)
1755             glXDestroyContext(xGlobalDisplay, oglDisplay.glContext);
1756       #endif
1757    #endif
1758          delete oglDisplay.flippingBuffer;
1759          delete oglDisplay;
1760          display.driverData = null;
1761       }
1762    }
1763
1764    void ::CheckExtensions(OGLSystem oglSystem)
1765    {
1766       const char * extensions = (const char *)glGetString(GL_EXTENSIONS);
1767       if(extensions)
1768          oglSystem.pow2textures = strstr(extensions, "GL_ARB_texture_non_power_of_two") ? false : true;
1769       glGetIntegerv(GL_MAX_TEXTURE_SIZE, &oglSystem.maxTextureSize);
1770    }
1771
1772    bool CreateDisplaySystem(DisplaySystem displaySystem)
1773    {
1774       bool result = false;
1775       OGLSystem oglSystem = displaySystem.driverData = OGLSystem { };
1776
1777    #ifdef __WIN32__
1778       oglSystem.hwnd = CreateWindow("static", null, 0,0,0,0,0,null,null,null,null);
1779
1780       oglSystem.hdc = GetDC(oglSystem.hwnd);
1781       if(oglSystem.hdc)
1782       {
1783
1784          oglSystem.pfd.nSize = (short)sizeof(oglSystem.pfd);
1785          oglSystem.pfd.nVersion = 1;
1786          oglSystem.pfd.dwFlags = PFD_DRAW_TO_WINDOW /*PFD_DRAW_TO_BITMAP*/ | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
1787          oglSystem.pfd.iPixelType = PFD_TYPE_RGBA;
1788          oglSystem.pfd.cColorBits = 24;
1789          oglSystem.pfd.cAlphaBits = 8;
1790          oglSystem.pfd.cDepthBits = 24;
1791          oglSystem.pfd.iLayerType = PFD_MAIN_PLANE;
1792
1793          oglSystem.format = ChoosePixelFormat(oglSystem.hdc, &oglSystem.pfd);
1794          DescribePixelFormat(oglSystem.hdc, oglSystem.format, sizeof(oglSystem.pfd), &oglSystem.pfd);
1795
1796          if(oglSystem.pfd.cColorBits > 8)
1797          {
1798             SetPixelFormat(oglSystem.hdc, oglSystem.format, &oglSystem.pfd);
1799             oglSystem.glrc = wglCreateContext(oglSystem.hdc);
1800             if(oglSystem.glrc)
1801             {
1802                wglMakeCurrent(oglSystem.hdc, oglSystem.glrc);
1803
1804                  // Get Pointers To The GL Functions
1805                glActiveTextureARB = (void *) wglGetProcAddress("glActiveTextureARB");
1806                glMultiTexCoord2fARB = (void *) wglGetProcAddress("glMultiTexCoord2fARB");
1807                glClientActiveTextureARB = (void *) wglGetProcAddress("glClientActiveTextureARB");
1808                glLockArraysEXT = (void *) wglGetProcAddress("glLockArraysEXT" );
1809                glUnlockArraysEXT = (void *) wglGetProcAddress("glUnlockArraysEXT");
1810                  glGenBuffersARB = (void *) wglGetProcAddress("glGenBuffersARB");
1811                  glBindBufferARB = (void *) wglGetProcAddress("glBindBufferARB");
1812                  glBufferDataARB = (void *) wglGetProcAddress("glBufferDataARB");
1813                glMapBufferARB  = (void *) wglGetProcAddress("glMapBufferARB");
1814                glUnmapBufferARB  = (void *) wglGetProcAddress("glUnmapBufferARB");
1815                  glDeleteBuffersARB = (void *) wglGetProcAddress("glDeleteBuffersARB");
1816                glBlendFuncSeparate = (void *) wglGetProcAddress("glBlendFuncSeparate");
1817
1818                wglChoosePixelFormatARB = (void *) wglGetProcAddress("wglChoosePixelFormatARB");
1819                wglGetExtensionsStringARB = (void *)wglGetProcAddress("wglGetExtensionsStringARB");
1820                wglCreatePbufferARB = (void *)wglGetProcAddress("wglCreatePbufferARB");
1821                wglGetPbufferDCARB = (void *)wglGetProcAddress("wglGetPbufferDCARB");
1822                wglQueryPbufferARB = (void *)wglGetProcAddress("wglQueryPbufferARB");
1823                wglDestroyPbufferARB = (void *)wglGetProcAddress("wglDestroyPbufferARB");
1824                wglReleasePbufferDCARB = (void *)wglGetProcAddress("wglReleasePbufferDCARB");
1825                wglBindTexImageARB = (void *)wglGetProcAddress("wglBindTexImageARB");
1826                wglReleaseTexImageARB = (void *)wglGetProcAddress("wglReleaseTexImageARB");
1827
1828                wglSwapIntervalEXT = (void *)wglGetProcAddress("wglSwapIntervalEXT");
1829
1830                vboAvailable = glBindBufferARB != null;
1831
1832                // eSystem_LoggingMode(LOG_MSGBOX, null);
1833
1834                if(wglChoosePixelFormatARB)
1835                {
1836                     int pixelFormat;
1837                     int valid;
1838                     int numFormats;
1839                     float fAttributes[] = {0,0};
1840                     int iAttributes[] =
1841                   {
1842                      WGL_DRAW_TO_WINDOW_ARB,GL_TRUE,
1843                             WGL_SUPPORT_OPENGL_ARB,GL_TRUE,
1844                             WGL_ACCELERATION_ARB,WGL_FULL_ACCELERATION_ARB,
1845                             WGL_COLOR_BITS_ARB,24,
1846                             WGL_ALPHA_BITS_ARB,8,
1847                             WGL_DEPTH_BITS_ARB,16,
1848                             WGL_STENCIL_BITS_ARB,0,
1849                             WGL_DOUBLE_BUFFER_ARB,GL_TRUE,
1850                             WGL_SAMPLE_BUFFERS_ARB,GL_TRUE,
1851                             WGL_SAMPLES_ARB, 4,                                         // Check For 4x Multisampling
1852                             0,0
1853                   };
1854
1855                   //Log("Found wglChoosePixelFormatARB\n");
1856
1857                     valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1858                     if(!valid || !numFormats)
1859                     {
1860                      //Log("Can't find 4x multi sampling\n");
1861                        iAttributes[19] = 2;
1862                        valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1863                      if(!valid || !numFormats)
1864                      {
1865                         // Log("Can't find 2x multi sampling\n");
1866                         iAttributes[16] = 0;
1867                         iAttributes[17] = 0;
1868                         valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1869                      }
1870                     }
1871                   if(valid && numFormats)
1872                   {
1873                      oglSystem.format = pixelFormat;
1874                      wglMakeCurrent(null, null);
1875                      wglDeleteContext(oglSystem.glrc);
1876
1877                      // *** DescribePixelFormat does not support WGL pixel formats! ***
1878                      //DescribePixelFormat(oglSystem.hdc, oglSystem.format, sizeof(oglSystem.pfd), &oglSystem.pfd);
1879                      SetPixelFormat(oglSystem.hdc, oglSystem.format, &oglSystem.pfd);
1880                      //Log("Successfully set pixel format\n");
1881
1882                      oglSystem.glrc = wglCreateContext(oglSystem.hdc);
1883                      wglMakeCurrent(oglSystem.hdc, oglSystem.glrc);
1884                   }
1885                }
1886                /*else
1887                   eSystem_Logf("Can't find wglChoosePixelFormatARB\n");*/
1888
1889                result = true;
1890
1891                CheckExtensions(oglSystem);
1892
1893                wglMakeCurrent(null, null);
1894
1895                //eSystem_DumpErrors(true);
1896             }
1897          }
1898       }
1899    #elif defined(__unix__) || defined(__APPLE__)
1900       vboAvailable = true;
1901       #if defined(__ANDROID__)
1902          egl_init_display(guiApp.desktop.windowHandle);
1903       #elif defined(__ODROID__)
1904          egl_init_display((uint)displaySystem.window);
1905          CheckExtensions(oglSystem);
1906          result = true;
1907       #elif defined(__EMSCRIPTEN__)
1908          if(glfwInit() == GL_TRUE)
1909          {
1910             const int width = 640, height = 480;
1911             if(glfwOpenWindow(width, height, 8, 8, 8, 8, 16, 0, GLFW_WINDOW) == GL_TRUE)
1912             {
1913                //glfwSwapBuffers();
1914                result = true;
1915             }
1916             else
1917                printf("glfwOpenWindow() failed\n"); //glfwTerminate();
1918          }
1919          else
1920             printf("glfwInit() failed\n"); //glfwTerminate();
1921       #else
1922       {
1923          X11Window root = RootWindow( xGlobalDisplay, DefaultScreen( xGlobalDisplay ) );
1924          XSetWindowAttributes attr;
1925          unsigned long mask;
1926
1927          int attrList[] =
1928          {
1929       #ifndef ECERE_MINIGLX
1930             GLX_USE_GL, GLX_DEPTH_SIZE, 1,
1931       #endif
1932             GLX_RGBA,
1933             GLX_RED_SIZE, 1, GLX_GREEN_SIZE, 1, GLX_BLUE_SIZE, 1,
1934             GLX_DOUBLEBUFFER,
1935             None
1936          };
1937          oglSystem.visualInfo = glXChooseVisual( xGlobalDisplay,  DefaultScreen( xGlobalDisplay ), attrList );
1938          attr.background_pixel = 0;
1939          attr.border_pixel = 0;
1940          attr.colormap = XCreateColormap( xGlobalDisplay, root, oglSystem.visualInfo->visual, AllocNone);
1941          attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
1942          mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
1943
1944          oglSystem.glxDrawable = XCreateWindow( xGlobalDisplay, root, 0, 0, 1, 1, 0, oglSystem.visualInfo->depth, InputOutput,
1945             oglSystem.visualInfo->visual, mask, &attr );
1946       }
1947       if(oglSystem.visualInfo)
1948       {
1949          oglSystem.glContext = glXCreateContext(xGlobalDisplay, oglSystem.visualInfo, null, True);
1950          if(oglSystem.glContext)
1951          {
1952             glXMakeCurrent(xGlobalDisplay, oglSystem.glxDrawable, oglSystem.glContext);
1953             // Setup Extensions
1954             CheckExtensions(oglSystem);
1955             glXMakeCurrent(xGlobalDisplay, None, null);
1956             result = true;
1957          }
1958       }
1959       #endif
1960    #endif
1961
1962       displaySystem.flags.alpha = true;
1963       displaySystem.flags.flipping = true;
1964       displaySystem.pixelFormat = pixelFormat888;
1965       return result;
1966    }
1967
1968    void DestroyDisplaySystem(DisplaySystem displaySystem)
1969    {
1970       OGLSystem oglSystem = displaySystem.driverData;
1971
1972    #if defined(__WIN32__)
1973       wglMakeCurrent( null, null );
1974
1975       if(oglSystem.glrc)
1976          wglDeleteContext(oglSystem.glrc);
1977
1978       if(oglSystem.hdc)
1979          ReleaseDC(oglSystem.hwnd, oglSystem.hdc);
1980       DestroyWindow(oglSystem.hwnd);
1981
1982    #elif defined(__unix__) || defined(__APPLE__)
1983       #if defined(__ANDROID__) || defined(__ODROID__)
1984          egl_term_display();
1985       #elif defined(__EMSCRIPTEN__)
1986          glfwTerminate();
1987       #else
1988       if(oglSystem.visualInfo)
1989       {
1990    #ifdef   ECERE_MINIGLX
1991          __miniglx_XFree(oglSystem.visualInfo);
1992    #else
1993          XFree(oglSystem.visualInfo);
1994    #endif
1995       }
1996
1997       if(oglSystem.glxDrawable)
1998       {
1999          XDestroyWindow(xGlobalDisplay, oglSystem.glxDrawable);
2000          oglSystem.glxDrawable = 0;
2001       }
2002       #endif
2003    #endif
2004       delete oglSystem;
2005    }
2006
2007    bool CreateDisplay(Display display)
2008    {
2009       bool result = false;
2010       OGLDisplay oglDisplay = display.driverData;
2011 #if !defined(__ANDROID__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
2012       OGLSystem oglSystem = display.displaySystem.driverData;
2013 #endif
2014       if(!oglDisplay)
2015          oglDisplay = display.driverData = OGLDisplay { };
2016       //printf("Inside CreateDisplay\n");
2017
2018 #if defined(__WIN32__) || defined(USEPBUFFER)
2019       if(!display.alphaBlend)
2020 #endif
2021       {
2022    #if defined(__WIN32__)
2023          oglDisplay.hdc = GetDC(display.window);
2024          SetPixelFormat(oglDisplay.hdc, oglSystem.format, &oglSystem.pfd);
2025          if((oglDisplay.glrc = wglCreateContext(oglDisplay.hdc)))
2026          {
2027             wglShareLists(oglSystem.glrc, oglDisplay.glrc);
2028             wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
2029             result = true;
2030          }
2031          else
2032             ReleaseDC(display.window, oglDisplay.hdc);
2033    #elif defined(__unix__) || defined(__APPLE__)
2034       #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
2035       #else
2036          XVisualInfo * visualInfo = ((XWindowData)display.windowDriverData).visual;
2037          /*
2038 #if defined(__APPLE__)
2039          XVisualInfo template = { 0 };
2040          XWindowAttributes winAttr;
2041          int n;
2042          XGetWindowAttributes(xGlobalDisplay, (X11Window)display.window, &winAttr);
2043          template.visualid = XVisualIDFromVisual(winAttr.visual);
2044          visualInfo = XGetVisualInfo(xGlobalDisplay, VisualIDMask, &template, &n);
2045 #ifdef _DEBUG
2046          printf("XGetVisualInfo visual ID = %d\n", template.visualid);
2047          printf("visualInfo visual ID = %d\n", visualInfo->visualid);
2048          printf("oglSystem.visualInfo visual ID = %d\n", oglSystem.visualInfo->visualid);
2049          printf("((XWindowData)display.windowDriverData).visual visual ID = %d\n", ((XWindowData)display.windowDriverData).visual->visualid);
2050 #endif
2051          // visualInfo = oglSystem.visualInfo;
2052 //#endif
2053          */
2054          if(visualInfo)
2055          {
2056             //printf("visualInfo is not null\n");
2057             // printf("Creating Display Context, sharing with %x!\n", oglSystem.glContext);
2058             oglDisplay.glContext = glXCreateContext(xGlobalDisplay, visualInfo, oglSystem.glContext, True);
2059             //XFree(visualInfo);
2060          }
2061
2062          // oglDisplay.glContext = glXCreateContext(xGlobalDisplay, oglSystem.visualInfo, oglSystem.glContext, True);
2063          if(oglDisplay.glContext)
2064          {
2065             //printf("CreateDisplay Got a Context\n");
2066             glXMakeCurrent(xGlobalDisplay, (GLXDrawable)display.window, oglDisplay.glContext);
2067             result = true;
2068          }
2069       #endif
2070    #endif
2071       }
2072 #if defined(__WIN32__) || defined(USEPBUFFER)
2073       else
2074          result = true;
2075 #endif
2076       if(result)
2077       {
2078 #if defined(__WIN32__)
2079          if(glBlendFuncSeparate)
2080             glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
2081          else
2082             glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2083 #else
2084 #if !defined(__OLDX__)
2085           glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
2086 #else
2087          glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
2088 #endif
2089 #endif
2090          glEnable(GL_BLEND);
2091
2092          glMatrixMode(GL_MODELVIEW);
2093          glScaled(1.0, 1.0, -1.0);
2094          // glTranslatef(0.375f, 0.375f, 0.0f);
2095          // glTranslatef(-0.625f, -0.625f, 0.0f);
2096          glMatrixMode(GL_PROJECTION);
2097          glShadeModel(GL_FLAT);
2098
2099          // glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, true);
2100 #if !defined(EM_MODE)
2101          glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
2102 #endif
2103          glFogi(GL_FOG_MODE, GL_EXP);
2104          glFogf(GL_FOG_DENSITY, 0);
2105          glEnable(GL_NORMALIZE);
2106          glDepthFunc(GL_LESS);
2107          glClearDepth(1.0);
2108          glDisable(GL_MULTISAMPLE_ARB);
2109       }
2110 #if !defined(ECERE_NO3D) && !defined(ECERE_VANILLA)
2111       display.ambient = Color { 50,50,50 };
2112 #endif
2113
2114       if(!useSingleGLContext)
2115       {
2116    #if defined(__WIN32__)
2117          wglMakeCurrent(null, null);
2118    #elif defined(__unix__) || defined(__APPLE__)
2119       #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
2120          result = true;
2121       #else
2122          glXMakeCurrent(xGlobalDisplay, None, null);
2123       #endif
2124    #endif
2125       }
2126       else
2127       {
2128       #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
2129          result = true;
2130       #endif
2131       }
2132
2133       return result;
2134    }
2135
2136    bool DisplaySize(Display display, int width, int height)
2137    {
2138       OGLDisplay oglDisplay = display.driverData;
2139
2140       bool result = false;
2141
2142       //printf("Inside DisplaySize\n");
2143 #if defined(__WIN32__) || defined(USEPBUFFER)
2144       OGLSystem oglSystem = display.displaySystem.driverData;
2145       if(display.alphaBlend)
2146       {
2147 #if defined(__WIN32__)
2148          const int attributes[]=
2149          {
2150             /*WGL_TEXTURE_FORMAT_ARB, WGL_TEXTURE_RGBA_ARB,
2151             WGL_TEXTURE_TARGET_ARB, WGL_TEXTURE_2D_ARB, */0
2152          };
2153          int pixelFormat = 0;
2154          if(wglChoosePixelFormatARB)
2155          {
2156             int valid;
2157             int numFormats;
2158             float fAttributes[] = {0,0};
2159             int iAttributes[] =
2160             {
2161                //WGL_DRAW_TO_BITMAP_ARB, GL_TRUE,
2162                WGL_DRAW_TO_PBUFFER_ARB,GL_TRUE,
2163                     WGL_SUPPORT_OPENGL_ARB,GL_TRUE,
2164                     WGL_ACCELERATION_ARB,WGL_FULL_ACCELERATION_ARB,
2165                     WGL_COLOR_BITS_ARB,24,
2166                     WGL_ALPHA_BITS_ARB,8,
2167                     WGL_DEPTH_BITS_ARB,16,
2168                     WGL_STENCIL_BITS_ARB,0,
2169                     WGL_DOUBLE_BUFFER_ARB,GL_FALSE,
2170                     WGL_SAMPLE_BUFFERS_ARB,GL_TRUE,
2171                     WGL_SAMPLES_ARB, 4,                                         // Check For 4x Multisampling
2172                     0,0
2173             };
2174
2175             //Log("Found wglChoosePixelFormatARB\n");
2176
2177             valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
2178             if(!valid || !numFormats)
2179             {
2180                //Log("Can't find 4x multi sampling\n");
2181                iAttributes[19] = 2;
2182                valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
2183                if(!valid || !numFormats)
2184                {
2185                   // Log("Can't find 2x multi sampling\n");
2186                   iAttributes[16] = 0;
2187                   iAttributes[17] = 0;
2188                   valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
2189                   if(!valid || !numFormats)
2190                   {
2191                      int iAttributes[] =
2192                      {
2193                         WGL_DRAW_TO_PBUFFER_ARB,GL_TRUE,
2194                         //WGL_DRAW_TO_BITMAP_ARB,GL_TRUE,
2195                         WGL_SUPPORT_OPENGL_ARB,GL_TRUE,
2196                         WGL_COLOR_BITS_ARB,24,
2197                         WGL_ALPHA_BITS_ARB,8,
2198                         WGL_DEPTH_BITS_ARB,16,
2199                         0,0
2200                      };
2201                      valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
2202                   }
2203                }
2204             }
2205             if(valid && numFormats)
2206             {
2207                wglMakeCurrent(null, null);
2208             }
2209          }
2210
2211          wglMakeCurrent( null, null );
2212          wglMakeCurrent( oglDisplay.hdc, oglDisplay.glrc );
2213          if(oglDisplay.hdc && oglDisplay.pBuffer)
2214             wglReleasePbufferDCARB(oglDisplay.pBuffer, oglDisplay.hdc);
2215
2216          wglDestroyPbufferARB(oglDisplay.pBuffer);
2217
2218          if(!useSingleGLContext)
2219             wglMakeCurrent( null, null );
2220
2221          if(oglDisplay.glrc)
2222             wglDeleteContext(oglDisplay.glrc);
2223
2224          oglDisplay.pBuffer = wglCreatePbufferARB(oglSystem.hdc, pixelFormat, width, height, attributes);
2225          oglDisplay.hdc = wglGetPbufferDCARB(oglDisplay.pBuffer);
2226          if((oglDisplay.glrc = wglCreateContext(oglDisplay.hdc)))
2227          {
2228             BITMAPINFO * info;
2229             HDC hdc = GetDC(display.window);
2230
2231             wglShareLists(oglSystem.glrc, oglDisplay.glrc);
2232             wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
2233
2234             //wglQueryPbufferARB(pBuffer, WGL_PBUFFER_WIDTH_ARB, &width);
2235             //wglQueryPbufferARB(pBuffer, WGL_PBUFFER_HEIGHT_ARB, &height);
2236
2237             // glDeleteBuffersARB(2, oglDisplay.imageBuffers);
2238
2239             if((info = (BITMAPINFO *)new0 byte[sizeof(BITMAPINFOHEADER)+sizeof(RGBQUAD)*256]))
2240             {
2241                HBITMAP newBitmap;
2242
2243                if(oglDisplay.memDC) DeleteDC(oglDisplay.memDC);
2244                oglDisplay.memDC = CreateCompatibleDC(hdc);
2245                SetMapMode(oglDisplay.memDC, MM_TEXT);
2246                info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
2247                info->bmiHeader.biPlanes = 1;
2248                info->bmiHeader.biCompression = BI_RGB;
2249                info->bmiHeader.biBitCount = 32; //(uint16)GetDeviceCaps(hdc, BITSPIXEL);
2250                info->bmiHeader.biWidth = width;
2251                info->bmiHeader.biHeight = height;
2252                newBitmap = CreateDIBSection(hdc, info, DIB_RGB_COLORS, &oglDisplay.picture, null, 0);
2253                if(newBitmap)
2254                {
2255                   SelectObject(oglDisplay.memDC, newBitmap);
2256                   if(oglDisplay.memBitmap) DeleteObject(oglDisplay.memBitmap);
2257                   /*
2258                   {
2259                      PIXELFORMATDESCRIPTOR pfd = { 0 };
2260                      pfd.nSize = (short)sizeof(pfd);
2261                      pfd.nVersion = 1;
2262                      pfd.dwFlags = PFD_DRAW_TO_BITMAP | PFD_SUPPORT_OPENGL;
2263                      pfd.iPixelType = PFD_TYPE_RGBA;
2264                      pfd.cColorBits = 32;
2265                      //pfd.cAlphaBits = 8;
2266                      pfd.cDepthBits = 24;
2267                      pfd.iLayerType = PFD_MAIN_PLANE;
2268
2269                      oglDisplay.hdc = oglDisplay.memDC;
2270
2271                      pixelFormat = ChoosePixelFormat(oglSystem.hdc, &pfd);
2272                      DescribePixelFormat(oglDisplay.hdc, pixelFormat, sizeof(pfd), &pfd);
2273                      SetPixelFormat(oglDisplay.hdc, pixelFormat, &pfd);
2274
2275                      oglDisplay.glrc = wglCreateContext(oglDisplay.hdc);
2276                      wglShareLists(oglSystem.glrc, oglDisplay.glrc);
2277                      wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
2278                   }
2279                   */
2280                   /*
2281                   {
2282                      const int imageSize = width * height * 4;
2283
2284                      glGenBuffersARB(2, oglDisplay.imageBuffers);
2285
2286                      glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[0]);
2287                      glBufferDataARB(GL_PIXEL_PACK_BUFFER_ARB, imageSize, null, GL_STREAM_READ);
2288                      // glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[1]);
2289                      // glBufferDataARB(GL_PIXEL_PACK_BUFFER_ARB, imageSize / 2, null, GL_STREAM_READ);
2290                   }
2291                   */
2292                   oglDisplay.memBitmap = newBitmap;
2293                   oglDisplay.stride = width;
2294
2295                   result = true;
2296                }
2297                delete info;
2298             }
2299             ReleaseDC(display.window, hdc);
2300          }
2301 #elif defined(__unix__) || defined(__APPLE__)
2302       #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
2303          result = true;
2304       #else
2305         int attrib[] =
2306         {
2307                 GLX_DOUBLEBUFFER,  True,
2308             GLX_DEPTH_SIZE,    1,
2309                 GLX_RED_SIZE,      8,
2310                 GLX_GREEN_SIZE,    8,
2311                 GLX_BLUE_SIZE,     8,
2312                 GLX_ALPHA_SIZE,    8,
2313                 GLX_STENCIL_SIZE,  1,
2314                 //GLX_DEPTH_SIZE,    24,
2315                 GLX_RENDER_TYPE,   GLX_RGBA_BIT,
2316                 GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT | GLX_WINDOW_BIT,
2317                 None
2318         };
2319
2320         int PBattrib[] =
2321         {
2322                 GLX_PBUFFER_WIDTH,   width,
2323                 GLX_PBUFFER_HEIGHT,  height,
2324                 GLX_LARGEST_PBUFFER, False,
2325             None
2326         };
2327
2328         // choose a pixel format that meets our minimum requirements
2329         int count = 0;
2330
2331         GLXFBConfig *config = glXChooseFBConfig(xGlobalDisplay, DefaultScreen(xGlobalDisplay), attrib, &count);
2332          if(config)
2333          {
2334             if(oglDisplay.pixmap)
2335             {
2336                XFreePixmap(xGlobalDisplay, oglDisplay.pixmap);
2337                oglDisplay.pixmap = None;
2338             }
2339             if(oglDisplay.shapePixmap)
2340             {
2341                XFreePixmap(xGlobalDisplay, oglDisplay.shapePixmap);
2342                oglDisplay.shapePixmap = None;
2343             }
2344
2345             // Free Shared Memory Pixmap
2346             if(oglDisplay.image)
2347             {
2348                if(oglDisplay.shminfoShape.shmid != -1)
2349                {
2350                   XShmDetach(xGlobalDisplay, &oglDisplay.shminfo);
2351                   if(oglDisplay.shminfo.shmaddr != (void *)-1)
2352                      shmdt(oglDisplay.shminfo.shmaddr);
2353                   shmctl(oglDisplay.shminfo.shmid, IPC_RMID, 0);
2354                }
2355                XDestroyImage(oglDisplay.image);
2356                oglDisplay.image = None;
2357             }
2358             if(oglDisplay.shapeImage)
2359             {
2360                if(oglDisplay.shminfoShape.shmid != -1)
2361                {
2362                   XShmDetach(xGlobalDisplay, &oglDisplay.shminfoShape);
2363                   if(oglDisplay.shminfoShape.shmaddr != (void *)-1)
2364                      shmdt(oglDisplay.shminfoShape.shmaddr);
2365                   shmctl(oglDisplay.shminfoShape.shmid, IPC_RMID, 0);
2366                }
2367                XDestroyImage(oglDisplay.shapeImage);
2368                oglDisplay.shapeImage = None;
2369             }
2370
2371             if(oglDisplay.windowPicture)
2372                XRenderFreePicture(xGlobalDisplay, oglDisplay.windowPicture);
2373             if(oglDisplay.pixmapPicture)
2374                XRenderFreePicture(xGlobalDisplay, oglDisplay.pixmapPicture);
2375
2376             if(oglDisplay.pixmap)
2377                XFreePixmap(xGlobalDisplay, oglDisplay.pixmap);
2378
2379             if(oglDisplay.glContext)
2380                   glXDestroyContext(xGlobalDisplay, oglDisplay.glContext);
2381             if(oglDisplay.pBuffer)
2382                glXDestroyPbuffer(xGlobalDisplay, oglDisplay.pBuffer);
2383
2384                 oglDisplay.pBuffer = glXCreatePbuffer(xGlobalDisplay, config[0], PBattrib);
2385             if(oglDisplay.pBuffer)
2386             {
2387                    oglDisplay.glContext = glXCreateNewContext(xGlobalDisplay, config[0], GLX_RGBA_TYPE, oglSystem.glContext, True);
2388                if(oglDisplay.glContext)
2389                {
2390                   glXMakeCurrent(xGlobalDisplay, None, null);
2391                   glXMakeCurrent(xGlobalDisplay, (GLXDrawable)display.window, oglDisplay.glContext);
2392
2393                   // Initialize Shared Memory Pixmap
2394                   oglDisplay.image = XShmCreateImage(xGlobalDisplay, DefaultVisual(xGlobalDisplay, DefaultScreen(xGlobalDisplay)), 32,
2395                      ZPixmap, null, &oglDisplay.shminfo, width, height);
2396                   if(oglDisplay.image)
2397                   {
2398                      oglDisplay.shminfo.shmid = shmget(IPC_PRIVATE,
2399                         oglDisplay.image->bytes_per_line * oglDisplay.image->height, IPC_CREAT|0777);
2400                      if(oglDisplay.shminfo.shmid != -1)
2401                      {
2402                         oglDisplay.shminfo.shmaddr = shmat(oglDisplay.shminfo.shmid, 0, 0);
2403                         if(oglDisplay.shminfo.shmaddr != (void *)-1)
2404                         {
2405                            oglDisplay.shminfo.readOnly = False;
2406                            if(XShmAttach(xGlobalDisplay, &oglDisplay.shminfo))
2407                            {
2408                               oglDisplay.pixmap = XShmCreatePixmap(xGlobalDisplay, (X11Window)display.window, oglDisplay.shminfo.shmaddr,
2409                                  &oglDisplay.shminfo, width, height, 32);
2410
2411                               // Initialize Shared Memory Shape Pixmap
2412                               oglDisplay.shapeImage = XShmCreateImage(xGlobalDisplay, DefaultVisual(xGlobalDisplay, DefaultScreen(xGlobalDisplay)), 1,
2413                                  ZPixmap, null, &oglDisplay.shminfoShape, width, height);
2414                               if(oglDisplay.shapeImage)
2415                               {
2416                                  oglDisplay.shminfoShape.shmid = shmget(IPC_PRIVATE,
2417                                     oglDisplay.shapeImage->bytes_per_line * oglDisplay.shapeImage->height, IPC_CREAT|0777);
2418                                  if(oglDisplay.shminfoShape.shmid != -1)
2419                                  {
2420                                     oglDisplay.shminfoShape.shmaddr = shmat(oglDisplay.shminfoShape.shmid, 0, 0);
2421                                     if(oglDisplay.shminfoShape.shmaddr != (void *)-1)
2422                                     {
2423                                        oglDisplay.shminfoShape.readOnly = False;
2424                                        if(XShmAttach(xGlobalDisplay, &oglDisplay.shminfoShape))
2425                                        {
2426                                           oglDisplay.shapePixmap = XShmCreatePixmap(xGlobalDisplay, (X11Window)display.window, oglDisplay.shminfoShape.shmaddr,
2427                                              &oglDisplay.shminfoShape, width, height, 1);
2428                                           //oglDisplay.shapePixmap = XCreatePixmap(xGlobalDisplay, (X11Window)display.window, width, height, 1);
2429
2430                                           {
2431                                              XRenderPictureAttributes attributes = { 0 };
2432                                              XRenderPictFormat * format = XRenderFindStandardFormat(xGlobalDisplay, /*PictStandardRGB24*/ PictStandardARGB32);
2433                                              #if !defined(__APPLE__) && !defined(__OLDX__)
2434                                              attributes.repeat = RepeatNormal;
2435                                              #else
2436                                              attributes.repeat = 1;
2437                                              #endif
2438                                              oglDisplay.pixmapPicture = XRenderCreatePicture(xGlobalDisplay, oglDisplay.pixmap, format, CPRepeat, &attributes);
2439                                              oglDisplay.windowPicture = XRenderCreatePicture(xGlobalDisplay, (X11Window)display.window, format, 0, &attributes);
2440                                              oglDisplay.shapePicture = XRenderCreatePicture(xGlobalDisplay, oglDisplay.shapePixmap,
2441                                                 XRenderFindStandardFormat(xGlobalDisplay, PictStandardA1), 0, &attributes);
2442                                           }
2443
2444                                           oglDisplay.picture = oglDisplay.shminfo.shmaddr;
2445                                           oglDisplay.stride = oglDisplay.image->bytes_per_line / 4;
2446
2447                                           result = true;
2448                                        }
2449                                     }
2450                                  }
2451                               }
2452                            }
2453                         }
2454                      }
2455                   }
2456                }
2457             }
2458             XFree(config);
2459          }
2460      #endif
2461 #endif
2462          CreateDisplay(display);
2463 #if defined(__WIN32__)
2464          wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
2465 #elif defined(__unix__) || defined(__APPLE__)
2466       #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
2467          width = eglWidth;
2468          height = eglHeight;
2469       #else
2470          glXMakeCurrent(xGlobalDisplay, (GLXDrawable)display.window, oglDisplay.glContext);
2471       #endif
2472 #endif
2473       }
2474       else
2475 #endif
2476          result = true;
2477       if(!result && display.alphaBlend)
2478       {
2479          printf("Alpha blending windows not supported on this display\n");
2480       }
2481       if(!result)
2482          return false;
2483
2484       result = false;
2485
2486       glViewport(0,0,width,height);
2487       glLoadIdentity();
2488       glOrtho(0,width,height,0,0.0,1.0);
2489       displayWidth = display.width = width;
2490       displayHeight = display.height = height;
2491
2492       if(!oglDisplay.flippingBuffer || oglDisplay.flipBufW < width || oglDisplay.flipBufH < height)
2493       {
2494          oglDisplay.flipBufW = width;
2495          oglDisplay.flipBufH = height;
2496 #ifdef _GLES
2497          result = true;
2498 #else
2499          oglDisplay.flippingBuffer = renew oglDisplay.flippingBuffer ColorAlpha [width * height];
2500 #endif
2501       }
2502       if(oglDisplay.flippingBuffer || !width || !height)
2503          result = true;
2504
2505       return result;
2506    }
2507
2508    void DisplayPosition(Display display, int x, int y)
2509    {
2510       OGLDisplay oglDisplay = display.driverData;
2511
2512       oglDisplay.x = x;
2513       oglDisplay.y = y;
2514    }
2515
2516    void SetPalette(Display display, ColorAlpha * palette, bool colorMatch)
2517    {
2518    }
2519
2520    void RestorePalette(Display display)
2521    {
2522    }
2523
2524    void StartUpdate(Display display)
2525    {
2526    }
2527
2528    void EndUpdate(Display display)
2529    {
2530    }
2531
2532    void Scroll(Display display, Box scroll, int x, int y, Extent dirty)
2533    {
2534    }
2535
2536    void Update(Display display, Box updateBox)
2537    {
2538 #if defined(__WIN32__) || defined(USEPBUFFER)
2539       OGLDisplay oglDisplay = display.driverData;
2540 #endif
2541       //Logf("DisplayScreen\n");
2542
2543       glFlush();
2544       glFinish();
2545 #if defined(__WIN32__) || defined(USEPBUFFER)
2546       if(display.alphaBlend)
2547       {
2548          glPixelStorei(GL_PACK_ALIGNMENT, 4);
2549          glPixelStorei(GL_PACK_ROW_LENGTH, oglDisplay.stride);
2550          glPixelStorei(GL_PACK_SKIP_ROWS, 0);
2551          glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
2552          glReadPixels(0,0,display.width,display.height,GL_BGRA_EXT,GL_UNSIGNED_BYTE, oglDisplay.picture);
2553
2554          {
2555 #if defined(__WIN32__)
2556             HDC hdc = GetDC(0);
2557             POINT point = { oglDisplay.x, oglDisplay.y};
2558             POINT srcPoint = { 0, 0 };
2559             BLENDFUNCTION blend = { 0 };
2560             SIZE size;
2561             size.cx = display.width;
2562             size.cy = display.height;
2563             blend.BlendOp = AC_SRC_OVER;
2564             blend.BlendFlags = 0;
2565             blend.SourceConstantAlpha = 255;
2566             blend.AlphaFormat = AC_SRC_ALPHA;
2567
2568             /*
2569             // Process partial images.  Mapping the buffer waits for
2570             // outstanding DMA transfers into the buffer to finish.
2571             glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[0]);
2572             oglDisplay.pboMemory1 = (byte *)glMapBufferARB(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
2573
2574             // glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[1]);
2575             // oglDisplay.pboMemory2 = (byte *)glMapBufferARB(GL_PIXEL_PACK_BUFFER_ARB,GL_READ_ONLY);
2576
2577
2578             memcpy(oglDisplay.picture, oglDisplay.pboMemory1, display.width * display.height * 4);
2579             //memcpy(oglDisplay.picture + display.width * display.height * 4 / 2, oglDisplay.pboMemory2, display.width * display.height * 4/ 2);
2580             */
2581
2582             UpdateLayeredWindow(display.window, hdc, &point, &size, oglDisplay.memDC, &srcPoint, 0, &blend, ULW_ALPHA);
2583             /*
2584
2585             // Unmap the image buffers
2586             glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[0]);
2587             glUnmapBufferARB(GL_PIXEL_PACK_BUFFER_ARB);
2588
2589             // glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[1]);
2590             // glUnmapBufferARB(GL_PIXEL_PACK_BUFFER_ARB);
2591
2592             // Bind two different buffer objects and start the glReadPixels
2593             // asynchronously. Each call will return directly after
2594             // starting the DMA transfer.
2595             glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[0]);
2596             glReadPixels(0, 0, display.width, display.height, GL_BGRA, GL_UNSIGNED_BYTE, 0);
2597
2598             // glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[1]);
2599             // glReadPixels(0, display.height/2, display.width, display.height/2, GL_BGRA, GL_UNSIGNED_BYTE, 0);
2600             */
2601
2602             ReleaseDC(0, hdc);
2603 #elif defined(__unix__) || defined(__APPLE__)
2604       #if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
2605       #else
2606             XTransform transform =
2607             {
2608                {
2609                   { (int)(1.0f * (1<<16)), (int)(0.0f * (1<<16)),  (int)(0 * (1 << 16)) },
2610                   { (int)(0.0f),           (int)(-1.0f * (1<<16)), (int)(0 * (1<<16)) },
2611                   { (int)(0.0f * (1<<16)), (int)(0.0f * (1<<16)),  (int)(1.0f * (1<<16)) }
2612                }
2613             };
2614             XRenderSetPictureTransform(xGlobalDisplay, oglDisplay.pixmapPicture, &transform);
2615             XRenderComposite(xGlobalDisplay, PictOpSrc, oglDisplay.pixmapPicture, None, oglDisplay.shapePicture, 0, 0, 0, 0, 0, 0, display.width, display.height);
2616             XRenderComposite(xGlobalDisplay, PictOpSrc, oglDisplay.pixmapPicture, None, oglDisplay.windowPicture, 0, 0, 0, 0, 0, 0, display.width, display.height);
2617             #if !defined(__APPLE__) && !defined(__OLDX__)
2618             XShapeCombineMask(xGlobalDisplay, (X11Window)display.window, ShapeInput, 0, 0, oglDisplay.shapePixmap, ShapeSet);
2619             #else
2620             XShapeCombineMask(xGlobalDisplay, display.window, 2, 0, 0, oglDisplay.shapePixmap, ShapeSet);
2621             #endif
2622             XFlush(xGlobalDisplay);
2623      #endif
2624 #endif
2625          }
2626       }
2627       else
2628 #endif
2629       {
2630 #if defined(__WIN32__)
2631          //wglSwapLayerBuffers(oglDisplay.hdc,WGL_SWAP_MAIN_PLANE);
2632          SwapBuffers(oglDisplay.hdc);
2633 #elif defined(__unix__) || defined(__APPLE__)
2634       #if defined(__ANDROID__) || defined(__ODROID__)
2635          eglSwapBuffers(eglDisplay, eglSurface);
2636       #elif defined(__EMSCRIPTEN__)
2637          glfwSwapBuffers();
2638       #else
2639          glXSwapBuffers(xGlobalDisplay, (GLXDrawable)display.window);
2640       #endif
2641 #endif
2642       }
2643       //Logf("Out of DisplayScreen\n");
2644    }
2645
2646    void FreeBitmap(DisplaySystem displaySystem, Bitmap bitmap)
2647    {
2648       if(bitmap.driverData)
2649       {
2650          GLuint tex = (GLuint)(uintptr)bitmap.driverData;
2651          glDeleteTextures(1, &tex);
2652          bitmap.driverData = 0;
2653       }
2654       bitmap.driver = ((subclass(DisplayDriver))class(LFBDisplayDriver));
2655    }
2656
2657    bool AllocateBitmap(DisplaySystem displaySystem, Bitmap bitmap, int width, int height, int stride, PixelFormat format, bool allocatePalette)
2658    {
2659       OGLSystem oglSystem = displaySystem.driverData;
2660       bool result = false;
2661       Bitmap mipMap { };
2662       GLuint glBitmap = 0;
2663
2664       uint w = width, h = height;
2665       if(oglSystem.pow2textures)
2666       {
2667          w = pow2i(w);
2668          h = pow2i(h);
2669       }
2670       w = Min(w, oglSystem.maxTextureSize);
2671       h = Min(h, oglSystem.maxTextureSize);
2672
2673       glGenTextures(1, &glBitmap);
2674       glBindTexture(GL_TEXTURE_2D, glBitmap);
2675
2676       glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
2677
2678       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2679       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2680
2681       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2682       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2683
2684       glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
2685
2686       mipMap.Allocate(null, w, h, w, pixelFormatRGBA, false);
2687
2688       // glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, mipMap.picture);
2689       glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, mipMap.picture);
2690
2691       delete mipMap;
2692
2693       bitmap.driverData = (void *)(uintptr)glBitmap;
2694       bitmap.driver = displaySystem.driver;
2695       bitmap.width = w;
2696       bitmap.height = h;
2697
2698       result = true;
2699       return result;
2700    }
2701
2702    bool MakeDDBitmap(DisplaySystem displaySystem, Bitmap bitmap, bool mipMaps)
2703    {
2704       bool result = false;
2705       OGLSystem oglSystem = displaySystem.driverData;
2706       Bitmap convBitmap = bitmap;
2707       if(bitmap.keepData)
2708       {
2709          convBitmap = { };
2710          convBitmap.Copy(bitmap);
2711       }
2712
2713       // Pre process the bitmap... First make it 32 bit
2714       if(/*bitmap.pixelFormat == pixelFormatRGBA || */convBitmap.Convert(null, pixelFormat888, null))
2715       {
2716          int c, level;
2717          uint w = bitmap.width, h = bitmap.height;
2718          GLuint glBitmap = 0;
2719          if(oglSystem.pow2textures)
2720          {
2721             w = pow2i(w);
2722             h = pow2i(h);
2723          }
2724          w = Min(w, oglSystem.maxTextureSize);
2725          h = Min(h, oglSystem.maxTextureSize);
2726
2727          if(mipMaps)
2728          {
2729             while(w * 2 < h) w *= 2;
2730             while(h * 2 < w) h *= 2;
2731          }
2732
2733          // Switch ARGB to RGBA
2734          //if(bitmap.format != pixelFormatRGBA)
2735          {
2736             for(c=0; c<bitmap.size; c++)
2737             {
2738                // ((ColorRGBA *)bitmap.picture)[c] = ((ColorAlpha *)bitmap.picture)[c];
2739                // TODO:
2740                ColorAlpha color = ((ColorAlpha *)convBitmap.picture)[c];
2741                ((ColorRGBA *)convBitmap.picture)[c] = ColorRGBA { color.color.r, color.color.g, color.color.b, color.a };
2742             }
2743          }
2744          // convBitmap.pixelFormat = pixelFormat888;
2745
2746          glGetError();
2747          glGenTextures(1, &glBitmap);
2748          if(glBitmap == 0)
2749          {
2750             //int error = glGetError();
2751             return false;
2752          }
2753
2754          glBindTexture(GL_TEXTURE_2D, glBitmap);
2755          glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
2756
2757          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2758          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mipMaps ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
2759          //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2760
2761          //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
2762          //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
2763
2764          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2765          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2766
2767          glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
2768
2769          result = true;
2770
2771          for(level = 0; result && (w > 1 || h > 1); level++, w >>= 1, h >>= 1)
2772          {
2773             Bitmap mipMap;
2774             if(bitmap.width != w || bitmap.height != h)
2775             {
2776                mipMap = Bitmap { };
2777                if(mipMap.Allocate(null, w, h, w, convBitmap.pixelFormat, false))
2778                {
2779                   Surface mipSurface = mipMap.GetSurface(0,0,null);
2780                   mipSurface.Filter(convBitmap, 0,0,0,0, w, h, convBitmap.width, convBitmap.height);
2781                   delete mipSurface;
2782                }
2783                else
2784                {
2785                   result = false;
2786                   delete mipMap;
2787                }
2788             }
2789             else
2790                mipMap = convBitmap;
2791
2792             if(result)
2793             {
2794                int error;
2795                //int width = 0;
2796                glGetError();
2797                // glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA8, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, mipMap.picture);
2798                glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, mipMap.picture);
2799                //printf("Calling glTexImage2D\n");
2800                //glGetTexLevelParameteriv(GL_TEXTURE_2D, level, GL_TEXTURE_WIDTH, &width);
2801                //printf("width = %d (Should be %d, %d)\n", width, w, h);
2802                if((error = glGetError()))
2803                {
2804                   //Logf("OpenGL Bitmap MakeDD error: %d...\n", error);
2805                   //printf("OpenGL Bitmap MakeDD error: %d...\n", error);
2806                   result = false;
2807                }
2808             }
2809             if(mipMap != convBitmap)
2810                delete mipMap;
2811             if(!mipMaps) break;
2812          }
2813
2814          convBitmap.driver.FreeBitmap(convBitmap.displaySystem, convBitmap);
2815          bitmap.driverData = (void *)(uintptr)glBitmap;
2816          bitmap.driver = displaySystem.driver;
2817          if(bitmap.keepData)
2818             delete convBitmap;
2819
2820          if(!result)
2821             FreeBitmap(displaySystem, bitmap);
2822          else if(oglSystem.loadingFont)
2823          {
2824             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
2825             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
2826             oglSystem.loadingFont = false;
2827          }
2828       }
2829       return result;
2830    }
2831
2832    void ReleaseSurface(Display display, Surface surface)
2833    {
2834       glDisable(GL_SCISSOR_TEST);
2835       delete surface.driverData;
2836       surface.driverData = null;
2837    }
2838
2839    bool GetBitmapSurface(DisplaySystem displaySystem, Surface surface, Bitmap bitmap, int x, int y, Box clip)
2840    {
2841       return false;
2842    }
2843
2844    bool GetSurface(Display display, Surface surface, int x,int y, Box clip)
2845    {
2846       bool result = false;
2847       OGLSurface oglSurface = surface.driverData = OGLSurface { };
2848
2849       //Logf("GetSurface\n");
2850
2851       if(oglSurface)
2852       {
2853          if(displayWidth != display.width || displayHeight != display.height)
2854          {
2855             displayWidth = display.width;
2856             displayHeight = display.height;
2857
2858             glViewport(0,0,display.width,display.height);
2859             glLoadIdentity();
2860             glOrtho(0,display.width,display.height,0,0.0,1.0);
2861          }
2862
2863          surface.offset.x = x;
2864          surface.offset.y = y;
2865          surface.unclippedBox = surface.box = clip;
2866          oglSurface.bitmapMult[0] = 1;
2867          oglSurface.bitmapMult[1] = 1;
2868          oglSurface.bitmapMult[2] = 1;
2869          oglSurface.bitmapMult[3] = 1;
2870
2871          glEnable(GL_SCISSOR_TEST);
2872          glScissor(
2873             x+clip.left,
2874             (display.height) -(y+clip.bottom)-1,
2875             clip.right-clip.left+1,
2876             clip.bottom-clip.top+1);
2877          result = true;
2878       }
2879       return result;
2880    }
2881
2882    void Clip(Display display, Surface surface, Box clip)
2883    {
2884       Box box;
2885
2886       //Logf("Clip\n");
2887
2888       if(clip != null)
2889       {
2890          box = clip;
2891          box.Clip(surface.unclippedBox);
2892          surface.box = box;
2893       }
2894       else
2895          box = surface.box = surface.unclippedBox;
2896       box.left += surface.offset.x;
2897       box.top  += surface.offset.y;
2898       box.right+= surface.offset.x;
2899       box.bottom += surface.offset.y;
2900
2901       glScissor(
2902          box.left,display.height - box.bottom - 1,
2903          box.right-box.left+1, box.bottom-box.top+1);
2904    }
2905
2906    bool GrabScreen(Display display, Bitmap bitmap, int x, int y, unsigned int w, unsigned int h)
2907    {
2908       bool result = false;
2909       OGLDisplay oglDisplay = display.driverData;
2910       ColorAlpha * flippingBuffer = oglDisplay.flippingBuffer;
2911
2912       if(oglDisplay.flippingBuffer)
2913       {
2914          if(bitmap.pixelFormat != pixelFormat888 || bitmap.width < w || bitmap.height < h)
2915          {
2916             bitmap.Free();
2917             bitmap.Allocate(null, w,h,w, pixelFormat888, false);
2918          }
2919          if(bitmap)
2920          {
2921             uint row;
2922
2923             glPixelStorei(GL_PACK_ALIGNMENT, 4);
2924             glPixelStorei(GL_PACK_ROW_LENGTH, bitmap.stride);
2925             glPixelStorei(GL_PACK_SKIP_ROWS, 0);
2926             glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
2927             glReadPixels(x,display.height-h-y,w,h,GL_BGRA_EXT,GL_UNSIGNED_BYTE, flippingBuffer);
2928
2929             // Need a flip...
2930             for(row = 0; row<h; row++)
2931                CopyBytesBy4(((ColorAlpha *)bitmap.picture) + row * w, ((ColorAlpha *)flippingBuffer) + (h-row-1) * w, w);
2932             result = true;
2933          }
2934       }
2935       return result;
2936    }
2937
2938    void SetForeground(Display display, Surface surface, ColorAlpha color)
2939    {
2940       OGLSurface oglSurface = surface.driverData;
2941
2942       //Logf("SetForeground\n");
2943
2944       oglSurface.foreground[0] = color.color.r/255.0f;
2945       oglSurface.foreground[1] = color.color.g/255.0f;
2946       oglSurface.foreground[2] = color.color.b/255.0f;
2947       //oglSurface.foreground[3] = 1.0f;
2948       oglSurface.foreground[3] = color.a/255.0f;
2949
2950       //if(!oglSurface.foreground[3])printf("bug");
2951    }
2952
2953    void SetBackground(Display display, Surface surface, ColorAlpha color)
2954    {
2955       OGLSurface oglSurface = surface.driverData;
2956
2957       //Logf("SetBackground\n");
2958
2959       oglSurface.background[0] = color.color.r/255.0f;
2960       oglSurface.background[1] = color.color.g/255.0f;
2961       oglSurface.background[2] = color.color.b/255.0f;
2962       //oglSurface.background[3] = 1.0;
2963       oglSurface.background[3] = color.a/255.0f;
2964    }
2965
2966    void SetBlitTint(Display display, Surface surface, ColorAlpha color)
2967    {
2968       OGLSurface oglSurface = surface.driverData;
2969
2970       oglSurface.bitmapMult[0] = color.color.r/255.0f;
2971       oglSurface.bitmapMult[1] = color.color.g/255.0f;
2972       oglSurface.bitmapMult[2] = color.color.b/255.0f;
2973       oglSurface.bitmapMult[3] = color.a/255.0f;
2974    }
2975
2976    ColorAlpha GetPixel(Display display, Surface surface,int x,int y)
2977    {
2978       return 0;
2979    }
2980
2981    void PutPixel(Display display, Surface surface,int x,int y)
2982    {
2983       OGLSurface oglSurface = surface.driverData;
2984
2985       //Logf("PutPixel\n");
2986
2987       glColor4fv(oglSurface.foreground);
2988       glBegin(GL_POINTS);
2989       // glVertex2i(x+surface.offset.x, y+surface.offset.y);
2990       glVertex2f(x+surface.offset.x + 0.5f, y+surface.offset.y + 0.5f);
2991
2992       glEnd();
2993    }
2994
2995    void DrawLine(Display display, Surface surface, int _x1, int _y1, int _x2, int _y2)
2996    {
2997       OGLSurface oglSurface = surface.driverData;
2998       float x1 = _x1, x2 = _x2, y1 = _y1, y2 = _y2;
2999       if(_x1 == _x2)
3000       {
3001          if(_y2 >= _y1)
3002             y2 += 1;
3003          else
3004             y1 += 1;
3005       }
3006       else if(_y1 == _y2)
3007       {
3008          if(_x2 >= _x1)
3009             x2 += 1;
3010          else
3011             x1 += 1;
3012       }
3013       x1 += surface.offset.x;
3014       y1 += surface.offset.y;
3015       x2 += surface.offset.x;
3016       y2 += surface.offset.y;
3017
3018       //Logf("Line\n");
3019
3020       glColor4fv(oglSurface.foreground);
3021       glBegin(GL_LINES);
3022 #if defined(_GLES) || defined(EM_MODE)
3023       if(stippleEnabled)
3024       {
3025          glTexCoord2f(0.5f, 0);
3026          glVertex2f(x1 + 0.5f, y1 + 0.5f);
3027          glTexCoord2f(Max(x2-x1, y2-y1) + 0.5f, 0);
3028          glVertex2f(x2 + 0.5f, y2 + 0.5f);
3029       }
3030       else
3031 #endif
3032       {
3033          /*
3034          glVertex2i(x1, y1);
3035          glVertex2i(x2, y2);
3036          */
3037          glVertex2f(x1 + 0.5f, y1 + 0.5f);
3038          glVertex2f(x2 + 0.5f, y2 + 0.5f);
3039       }
3040
3041       glEnd();
3042    }
3043
3044    void Rectangle(Display display, Surface surface,int x1,int y1,int x2,int y2)
3045    {
3046       OGLSurface oglSurface = surface.driverData;
3047       x1 += surface.offset.x;
3048       y1 += surface.offset.y;
3049       x2 += surface.offset.x;
3050       y2 += surface.offset.y;
3051
3052       //Logf("Rectangle\n");
3053
3054       glColor4fv(oglSurface.foreground);
3055 #if defined(_GLES) || defined(EM_MODE)
3056       if(stippleEnabled)
3057       {
3058          glBegin(GL_LINES);
3059
3060          glTexCoord2f(0.5f, 0);
3061          glVertex2f(x1 + 0.5f, y1 + 0.5f);
3062          glTexCoord2f(y2-y1 + 0.5f, 0);
3063          glVertex2f(x1 + 0.5f, y2 + 0.5f);
3064
3065          glTexCoord2f(0.5f, 0);
3066          glVertex2f(x1 + 0.5f, y2 + 0.5f);
3067          glTexCoord2f(x2 - x1 + 0.5f, 0);
3068          glVertex2f(x2 + 0.5f, y2 + 0.5f);
3069
3070          glTexCoord2f(0.5f, 0);
3071          glVertex2f(x2 + 0.5f, y2 + 0.5f);
3072          glTexCoord2f(y1 - y2 + 0.5f, 0);
3073          glVertex2f(x2 + 0.5f, y1 + 0.5f);
3074
3075          glTexCoord2f(0.5f, 0);
3076          glVertex2f(x2 + 0.5f, y1 + 0.5f);
3077          glTexCoord2f(x1 - x2 + 0.5f, 0);
3078          glVertex2f(x1 + 0.5f, y1 + 0.5f);
3079       }
3080       else
3081 #endif
3082       {
3083          glBegin(GL_LINE_LOOP);
3084          /*
3085          glVertex2i(x1, y1);
3086          glVertex2i(x1, y2);
3087          glVertex2i(x2, y2);
3088          glVertex2i(x2, y1);
3089          */
3090          glVertex2f(x1 + 0.5f, y1 + 0.5f);
3091          glVertex2f(x1 + 0.5f, y2 + 0.5f);
3092          glVertex2f(x2 + 0.5f, y2 + 0.5f);
3093          glVertex2f(x2 + 0.5f, y1 + 0.5f);
3094       }
3095       glEnd();
3096    }
3097
3098    void Area(Display display, Surface surface,int x1,int y1,int x2,int y2)
3099    {
3100       OGLSurface oglSurface = surface.driverData;
3101       //Logf("Area\n");
3102
3103       glColor4fv(oglSurface.background);
3104
3105 #ifdef EM_MODE
3106       glBegin(GL_QUADS);
3107       glVertex2f(x1+surface.offset.x, y1+surface.offset.y);
3108       glVertex2f(x1+surface.offset.x, y2+surface.offset.y+1);
3109       glVertex2f(x2+surface.offset.x+1, y2+surface.offset.y+1);
3110       glVertex2f(x2+surface.offset.x+1, y1+surface.offset.y);
3111       glEnd();
3112 #else
3113       glRecti(x1+surface.offset.x, y1+surface.offset.y,
3114               x2+surface.offset.x + 1, y2+surface.offset.y + 1);
3115 #endif
3116       /*
3117       glRectf(x1+surface.offset.x, y1+surface.offset.y,
3118               x2+surface.offset.x + 1, y2+surface.offset.y + 1);
3119       */
3120    }
3121
3122    void Clear(Display display, Surface surface, ClearType type)
3123    {
3124       OGLDisplay oglDisplay = display.driverData;
3125       OGLSurface oglSurface = surface.driverData;
3126
3127       //Logf("Clear\n");
3128       if(type != depthBuffer)
3129          glClearColor(oglSurface.background[0], oglSurface.background[1], oglSurface.background[2], oglSurface.background[3]);
3130       if(type != colorBuffer && !oglDisplay.depthWrite)
3131       {
3132          glDepthMask((byte)bool::true);
3133       }
3134       glClear(((type != depthBuffer) ? GL_COLOR_BUFFER_BIT : 0) |
3135               ((type != colorBuffer) ? GL_DEPTH_BUFFER_BIT : 0));
3136       if(type != colorBuffer && !oglDisplay.depthWrite)
3137       {
3138          glDepthMask((byte)bool::false);
3139       }
3140    }
3141
3142    bool ConvertBitmap(DisplaySystem displaySystem, Bitmap bitmap, PixelFormat format, ColorAlpha * palette)
3143    {
3144       return true;
3145    }
3146
3147    void Blit(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h)
3148    {
3149       OGLSurface oglSurface = surface.driverData;
3150
3151 #if !defined(__OLDX__)
3152          // WHY DO WE HAVE GL_ONE HERE ?
3153          /*if(glBlendFuncSeparate && !oglSurface.writingText)
3154             glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);*/
3155 #endif
3156
3157       if(!oglSurface.writingText)
3158       {
3159          // glTranslatef(-0.375f, -0.375f, 0.0f);
3160          glEnable(GL_TEXTURE_2D);
3161          glColor4fv(oglSurface.bitmapMult);
3162       }
3163       else if(oglSurface.xOffset)
3164          glTranslated(oglSurface.xOffset / 64.0/*-0.375*/, 0.0, 0.0);
3165
3166       glBindTexture(GL_TEXTURE_2D, (GLuint)(uintptr)bitmap.driverData);
3167       glBegin(GL_QUADS);
3168
3169       if(h < 0)
3170       {
3171          glTexCoord2f((float)sx/ bitmap.width, (float)(sy-h)/ bitmap.height);
3172          glVertex2i(dx+surface.offset.x, dy+surface.offset.y);
3173          glTexCoord2f((float)(sx+w) / bitmap.width, (float)(sy-h)/ bitmap.height);
3174          glVertex2i(dx+w+surface.offset.x, dy+surface.offset.y);
3175          glTexCoord2f((float)(sx+w)/ bitmap.width, (float)sy/ bitmap.height);
3176          glVertex2i(dx+w+surface.offset.x, dy-h+surface.offset.y);
3177          glTexCoord2f((float)sx / bitmap.width, (float)sy/ bitmap.height);
3178          glVertex2i(dx+surface.offset.x, dy-h+surface.offset.y);
3179       }
3180       else
3181       {
3182          /*
3183          glTexCoord2f((float)sx / bitmap.width, (float)sy/ bitmap.height);
3184          glVertex2i(dx+surface.offset.x, dy+surface.offset.y);
3185          glTexCoord2f((float)(sx+w)/ bitmap.width, (float)sy/ bitmap.height);
3186          glVertex2i(dx+w+surface.offset.x, dy+surface.offset.y);
3187          glTexCoord2f((float)(sx+w) / bitmap.width, (float)(sy+h)/ bitmap.height);
3188          glVertex2i(dx+w+surface.offset.x, dy+h+surface.offset.y);
3189          glTexCoord2f((float)sx/ bitmap.width, (float)(sy+h)/ bitmap.height);
3190          glVertex2i(dx+surface.offset.x, dy+h+surface.offset.y);
3191          */
3192
3193          glTexCoord2f((float)sx / bitmap.width, (float)sy/ bitmap.height);
3194          glVertex2f((float)dx+surface.offset.x, (float)dy+surface.offset.y);
3195          glTexCoord2f((float)(sx+w)/ bitmap.width, (float)sy/ bitmap.height);
3196          glVertex2f((float)dx+w+surface.offset.x, (float)dy+surface.offset.y);
3197          glTexCoord2f((float)(sx+w) / bitmap.width, (float)(sy+h)/ bitmap.height);
3198          glVertex2f((float)dx+w+surface.offset.x, (float)dy+h+surface.offset.y);
3199          glTexCoord2f((float)sx/ bitmap.width, (float)(sy+h)/ bitmap.height);
3200          glVertex2f((float)dx+surface.offset.x, (float)dy+h+surface.offset.y);
3201       }
3202       glEnd();
3203
3204       if(!oglSurface.writingText)
3205       {
3206          glDisable(GL_TEXTURE_2D);
3207
3208          //glTranslate(0.375, 0.375, 0.0);
3209       }
3210       else if(oglSurface.xOffset)
3211          glTranslated(-oglSurface.xOffset / 64.0/*+0.375*/, 0.0, 0.0);
3212
3213 #if !defined(__OLDX__)
3214          /*if(glBlendFuncSeparate && !oglSurface.writingText)
3215             glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);*/
3216 #endif
3217    }
3218
3219    void Stretch(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h, int sw, int sh)
3220    {
3221       OGLSurface oglSurface = surface.driverData;
3222
3223       //glTranslate(-0.375, -0.375, 0.0);
3224
3225       //Logf("Stretch\n");
3226
3227 #if !defined(__OLDX__)
3228       /*if(glBlendFuncSeparate)
3229          glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);*/
3230 #endif
3231
3232       glEnable(GL_TEXTURE_2D);
3233       glBindTexture(GL_TEXTURE_2D, (GLuint)(uintptr)bitmap.driverData);
3234
3235       glColor4fv(oglSurface.bitmapMult);
3236
3237       glBegin(GL_QUADS);
3238
3239       if(h < 0)
3240       {
3241          glTexCoord2f((float)(sx)/ bitmap.width, (float)(sy+sh)/ bitmap.height);
3242          glVertex2i(dx+surface.offset.x, dy+surface.offset.y);
3243
3244          glTexCoord2f((float)(sx+sw) / bitmap.width, (float)(sy+sh)/ bitmap.height);
3245          glVertex2i(dx+w+surface.offset.x, dy+surface.offset.y);
3246
3247          glTexCoord2f((float)(sx+sw)/ bitmap.width, (float)(sy)/ bitmap.height);
3248          glVertex2i(dx+w+surface.offset.x, dy-h+surface.offset.y);
3249
3250          glTexCoord2f((float)(sx) / bitmap.width, (float)(sy)/ bitmap.height);
3251          glVertex2i(dx+surface.offset.x, dy-h+surface.offset.y);
3252       }
3253       else
3254       {
3255          glTexCoord2f((float)(sx) / bitmap.width, (float)(sy)/ bitmap.height);
3256          glVertex2i(dx+surface.offset.x, dy+surface.offset.y);
3257
3258          glTexCoord2f((float)(sx+sw)/ bitmap.width, (float)(sy)/ bitmap.height);
3259          glVertex2i(dx+w+surface.offset.x, dy+surface.offset.y);
3260
3261          glTexCoord2f((float)(sx+sw) / bitmap.width, (float)(sy+sh)/ bitmap.height);
3262          glVertex2i(dx+w+surface.offset.x, dy+h+surface.offset.y);
3263
3264          glTexCoord2f((float)(sx)/ bitmap.width, (float)(sy+sh)/ bitmap.height);
3265          glVertex2i(dx+surface.offset.x, dy+h+surface.offset.y);
3266       }
3267
3268       glEnd();
3269
3270       glDisable(GL_TEXTURE_2D);
3271
3272       //glTranslate(0.375, 0.375, 0.0);
3273 #if !defined(__OLDX__)
3274       /*if(glBlendFuncSeparate)
3275          glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);*/
3276 #endif
3277
3278    }
3279
3280    void Filter(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h, int sw, int sh)
3281    {
3282       Stretch(display, surface, bitmap, dx, dy, sx, sy, w, h, sw, sh);
3283    }
3284
3285    void StretchDI(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h, int sw, int sh)
3286    {
3287 #if !defined(EM_MODE)
3288       float s2dw,s2dh,d2sw,d2sh;
3289       //bool flipX = false, flipY = false;
3290
3291       //Logf("StretchDI\n");
3292
3293       if(Sgn(w) != Sgn(sw))
3294       {
3295          w = Abs(w);
3296          sw = Abs(sw);
3297          //flipX = true;
3298       }
3299       if(Sgn(h) != Sgn(sh))
3300       {
3301          h = Abs(h);
3302          sh = Abs(sh);
3303          //flipY = true;
3304       }
3305
3306       s2dw=(float)w / sw;
3307       s2dh=(float)h / sh;
3308       d2sw=(float)sw / w;
3309       d2sh=(float)sh / h;
3310
3311       //Clip against the edges of the source
3312       if(sx<0)
3313       {
3314          dx+=(int)((0-sx) * s2dw);
3315          w-=(int)((0-sx) * s2dw);
3316          sw-=0-sx;
3317          sx=0;
3318       }
3319       if(sy<0)
3320       {
3321          dy+=(int)((0-sy) * s2dh);
3322          h-=(int)((0-sy) * s2dh);
3323
3324          sh-=0-sy;
3325          sy=0;
3326       }
3327       if(sx+sw>bitmap.width-1)
3328       {
3329          w-=(int)((sx+sw-(bitmap.width-1)-1)*s2dw);
3330          sw-=sx+sw-(bitmap.width-1)-1;
3331       }
3332       if(sy+sh>(bitmap.height-1))
3333       {
3334          h-=(int)((sy+sh-(bitmap.height-1)-1)*s2dh);
3335          sh-=sy+sh-(bitmap.height-1)-1;
3336       }
3337       //Clip against the edges of the surfaceination
3338       if(dx<surface.box.left)
3339       {
3340          //if(!flip)
3341          sx+=(int)((surface.box.left-dx)*d2sw);
3342          sw-=(int)((surface.box.left-dx)*d2sw);
3343          w-=surface.box.left-dx;
3344          dx=surface.box.left;
3345       }
3346       if(dy<surface.box.top)
3347       {
3348          sy+=(int)((surface.box.top-dy)*d2sh);
3349          sh-=(int)((surface.box.top-dy)*d2sh);
3350          h-=surface.box.top-dy;
3351          dy=surface.box.top;
3352       }
3353       if(dx+w>surface.box.right)
3354       {
3355          //if(flip) sx+=(int)((dx+w-surface.box.right-1)*d2sw);
3356          sw-=(int)((dx+w-surface.box.right-1)*d2sw);
3357          w-=dx+w-surface.box.right-1;
3358       }
3359       if(dy+h>surface.box.bottom)
3360       {
3361          sh-=(int)((dy+h-surface.box.bottom-1)*d2sh);
3362          h-=dy+h-surface.box.bottom-1;
3363       }
3364       if((w<=0)||(h<=0)||(sw<=0)||(sh<=0)) return;
3365
3366       dx += surface.offset.x;
3367       dy += surface.offset.y;
3368
3369       if(bitmap.pixelFormat == pixelFormat888 && !bitmap.paletteShades)
3370       {
3371          glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
3372          glPixelStorei(GL_UNPACK_ROW_LENGTH, bitmap.stride);
3373          glPixelStorei(GL_UNPACK_SKIP_PIXELS, sx);
3374          glPixelStorei(GL_UNPACK_SKIP_ROWS, sy);
3375          glRasterPos2d(dx,dy);
3376          //glPixelZoom(flipX ? -s2dw : s2dw, flipY ? s2dh : -s2dh);
3377          glPixelZoom(s2dw, -s2dh);
3378          glDrawPixels(sw,sh,GL_BGRA_EXT,GL_UNSIGNED_BYTE, bitmap.picture);
3379          glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
3380          glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
3381          glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
3382          glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
3383       }
3384 #endif
3385    }
3386
3387    void BlitDI(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h)
3388    {
3389 #if !defined(EM_MODE)
3390       //Logf("BlitDI\n");
3391
3392       //Clip against the edges of the source
3393       if(sx<0)
3394       {
3395          dx+=-sx;
3396          w-=-sx;
3397          sx=0;
3398       }
3399       if(sy<0)
3400       {
3401          dy+=0-sy;
3402          h-=0-sy;
3403          sy=0;
3404       }
3405       if(sx+w>bitmap.width-1)
3406          w-=sx+w-(bitmap.width-1)-1;
3407       if(sy+h>bitmap.height-1)
3408          h-=sy+h-(bitmap.height-1)-1;
3409       //Clip against the edges of the surfaceination
3410       if(dx<surface.box.left)
3411       {
3412          //if(!flip)
3413          sx+=surface.box.left-dx;
3414          w-=surface.box.left-dx;
3415          dx=surface.box.left;
3416       }
3417       if(dy<surface.box.top)
3418       {
3419          sy+=surface.box.top-dy;
3420          h-=surface.box.top-dy;
3421          dy=surface.box.top;
3422       }
3423       if(dx+w>surface.box.right)
3424       {
3425          //if(flip) sx+=dx+w-surface.box.right-1;
3426          w-=dx+w-surface.box.right-1;
3427       }
3428       if(dy+h>surface.box.bottom)
3429          h-=dy+h-surface.box.bottom-1;
3430       if((w<=0)||(h<=0))
3431          return;
3432
3433       dx += surface.offset.x;
3434       dy += surface.offset.y;
3435
3436       if(bitmap.pixelFormat == pixelFormat888 && !bitmap.paletteShades)
3437       {
3438          glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
3439          glPixelStorei(GL_UNPACK_ROW_LENGTH, bitmap.stride);
3440          glPixelStorei(GL_UNPACK_SKIP_PIXELS, sx);
3441          glPixelStorei(GL_UNPACK_SKIP_ROWS, sy);
3442          glRasterPos2d(dx,dy);
3443          glPixelZoom(1,-1);
3444          glDrawPixels(w,h,GL_BGRA_EXT,GL_UNSIGNED_BYTE, bitmap.picture);
3445          glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
3446          glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
3447          glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
3448          glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
3449       }
3450 #endif
3451    }
3452
3453    void FilterDI(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h, int sw, int sh)
3454    {
3455       StretchDI(display, surface, bitmap, dx, dy, sx, sy, w, h, sw, sh);
3456    }
3457
3458    void UnloadFont(DisplaySystem displaySystem, Font font)
3459    {
3460       ((subclass(DisplayDriver))class(LFBDisplayDriver)).UnloadFont(displaySystem, font);
3461    }
3462
3463    Font LoadFont(DisplaySystem displaySystem, const char * faceName, float size, FontFlags flags)
3464    {
3465       Font font;
3466       OGLSystem oglSystem = displaySystem.driverData;
3467       oglSystem.loadingFont = true;
3468       font = ((subclass(DisplayDriver))class(LFBDisplayDriver)).LoadFont(displaySystem, faceName, size, flags);
3469       return font;
3470    }
3471
3472    void FontExtent(DisplaySystem displaySystem, Font font, const char * text, int len, int * width, int * height)
3473    {
3474       ((subclass(DisplayDriver))class(LFBDisplayDriver)).FontExtent(displaySystem, font, text, len, width, height);
3475    }
3476
3477    void WriteText(Display display, Surface surface, int x, int y, const char * text, int len)
3478    {
3479       OGLSurface oglSurface = surface.driverData;
3480       OGLSystem oglSystem = display.displaySystem.driverData;
3481       oglSystem.loadingFont = true;
3482
3483       //glTranslated(-0.375, -0.375, 0.0);
3484
3485       //Logf("Blit\n");
3486
3487       if(surface.textOpacity)
3488       {
3489          int w, h;
3490          FontExtent(display.displaySystem, surface.font, text, len, &w, &h);
3491          display.displaySystem.driver.Area(display, surface,x,y,x+w-1,y+h-1);
3492       }
3493
3494       oglSurface.writingText = true;
3495
3496       glEnable(GL_TEXTURE_2D);
3497
3498       if(surface.outline.size)
3499       {
3500          ColorAlpha outlineColor = surface.outline.color;
3501          glColor4ub(outlineColor.color.r, outlineColor.color.g, outlineColor.color.b, outlineColor.a);
3502          //glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
3503          //glEnable(GL_BLEND);
3504
3505          oglSurface.writingOutline = true;
3506          ((subclass(DisplayDriver))class(LFBDisplayDriver)).WriteText(display, surface, x, y, text, len);
3507          oglSurface.writingOutline = false;
3508       }
3509       glColor4fv(oglSurface.foreground);
3510
3511       ((subclass(DisplayDriver))class(LFBDisplayDriver)).WriteText(display, surface, x, y, text, len);
3512       oglSurface.writingText = false;
3513       oglSystem.loadingFont = false;
3514
3515       glDisable(GL_TEXTURE_2D);
3516
3517       //glTranslated(0.375, 0.375, 0.0);
3518    }
3519
3520    void TextFont(Display display, Surface surface, Font font)
3521    {
3522       ((subclass(DisplayDriver))class(LFBDisplayDriver)).TextFont(display, surface, font);
3523    }
3524
3525    void TextOpacity(Display display, Surface surface, bool opaque)
3526    {
3527       OGLSurface oglSurface = surface.driverData;
3528       oglSurface.opaqueText = opaque;
3529    }
3530
3531    void TextExtent(Display display, Surface surface, const char * text, int len, int * width, int * height)
3532    {
3533       OGLSurface oglSurface = surface.driverData;
3534       OGLSystem oglSystem = display.displaySystem.driverData;
3535       oglSystem.loadingFont = true;
3536       FontExtent(display.displaySystem, oglSurface.font, text, len, width, height);
3537       oglSystem.loadingFont = false;
3538    }
3539
3540    void DrawingChar(Display display, Surface surface, char character)
3541    {
3542
3543    }
3544
3545    void LineStipple(Display display, Surface surface, uint32 stipple)
3546    {
3547       //Logf("Stipple\n");
3548
3549       if(stipple)
3550       {
3551 #if defined(_GLES) || defined(EM_MODE)
3552          stippleEnabled = true;
3553          glesLineStipple(1, (uint16)stipple);
3554 #else
3555          glLineStipple(1, (uint16)stipple);
3556          glEnable(GL_LINE_STIPPLE);
3557 #endif
3558       }
3559       else
3560       {
3561 #if defined(_GLES) || defined(EM_MODE)
3562          stippleEnabled = false;
3563          glMatrixMode(GL_TEXTURE);
3564          glLoadIdentity();
3565          glMatrixMode(GL_PROJECTION);
3566          glDisable(GL_TEXTURE_2D);
3567 #else
3568          glDisable(GL_LINE_STIPPLE);
3569 #endif
3570       }
3571    }
3572 #if !defined(ECERE_NO3D) && !defined(ECERE_VANILLA)
3573    void SetRenderState(Display display, RenderState state, uint value)
3574    {
3575       OGLDisplay oglDisplay = display.driverData;
3576       //Logf("RenderState\n");
3577
3578       switch(state)
3579       {
3580          case antiAlias:
3581             if(value)
3582                glEnable(GL_MULTISAMPLE_ARB);
3583             else
3584                glDisable(GL_MULTISAMPLE_ARB);
3585             break;
3586          case fillMode:
3587 #if !defined(_GLES)
3588             glPolygonMode(GL_FRONT_AND_BACK, ((FillModeValue)value == solid) ? GL_FILL : GL_LINE);
3589 #endif
3590             break;
3591          case depthTest:
3592             if(value) glEnable(GL_DEPTH_TEST); else glDisable(GL_DEPTH_TEST);
3593             break;
3594          case depthWrite:
3595             if(value) glDepthMask((byte)bool::true); else glDepthMask((byte)bool::false);
3596             oglDisplay.depthWrite = (bool)value;
3597             break;
3598          case fogColor:
3599          {
3600             float color[4] = { ((Color)value).r/255.0f, ((Color)value).g/255.0f, ((Color)value).b/255.0f, 1.0f };
3601             glFogfv(GL_FOG_COLOR, (float *)&color);
3602             break;
3603          }
3604          case fogDensity:
3605             glFogf(GL_FOG_DENSITY, (float)(RenderStateFloat { ui = value }.f * nearPlane));
3606             break;
3607          case blend:
3608             if(value) glEnable(GL_BLEND); else glDisable(GL_BLEND);
3609             break;
3610          case ambient:
3611          {
3612 #if !defined(EM_MODE)
3613             float ambient[4] = { ((Color)value).r/255.0f, ((Color)value).g/255.0f, ((Color)value).b/255.0f, 1.0f };
3614             glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
3615 #endif
3616             break;
3617          }
3618          case alphaWrite:
3619          {
3620             if(value) glColorMask(1,1,1,1); else glColorMask(1,1,1,0);
3621             break;
3622          }
3623          case vSync:
3624          {
3625 #if defined(__WIN32__)
3626             wglSwapIntervalEXT(value ? 1 : 0);
3627 #endif
3628             break;
3629          }
3630       }
3631    }
3632
3633    void SetLight(Display display, int id, Light light)
3634    {
3635 #if !defined(EM_MODE)
3636       //Logf("SetLight\n");
3637
3638       if(light != null)
3639       {
3640          Object lightObject = light.lightObject;
3641          float position[4] = { 0, 0, 0, 0 };
3642          float color[4] = { 0, 0, 0, 1 };
3643
3644          glEnable(GL_LIGHT0 + id);
3645          /*
3646          glLightfv(GL_LIGHT0 + id, GL_DIFFUSE, (float *)&light.diffuse);
3647          glLightfv(GL_LIGHT0 + id, GL_AMBIENT, (float *)&light.ambient);
3648          glLightfv(GL_LIGHT0 + id, GL_SPECULAR,(float *)&light.specular);
3649          */
3650
3651          if(!light.multiplier) light.multiplier = 1.0f;
3652
3653          color[0] = light.diffuse.r * light.multiplier;
3654          color[1] = light.diffuse.g * light.multiplier;
3655          color[2] = light.diffuse.b * light.multiplier;
3656          glLightfv(GL_LIGHT0 + id, GL_DIFFUSE, color);
3657
3658          color[0] = light.ambient.r * light.multiplier;
3659          color[1] = light.ambient.g * light.multiplier;
3660          color[2] = light.ambient.b * light.multiplier;
3661          glLightfv(GL_LIGHT0 + id, GL_AMBIENT, color);
3662          color[0] = light.specular.r * light.multiplier;
3663          color[1] = light.specular.g * light.multiplier;
3664          color[2] = light.specular.b * light.multiplier;
3665          glLightfv(GL_LIGHT0 + id, GL_SPECULAR,color);
3666
3667          if(lightObject)
3668          {
3669             Vector3D positionVector;
3670             if(light.flags.spot)
3671             {
3672                if(lightObject.flags.root || !lightObject.parent)
3673                {
3674                   positionVector = lightObject.transform.position;
3675                   positionVector.Subtract(positionVector, display.display3D.camera.cPosition);
3676                }
3677                else
3678                {
3679                   positionVector.MultMatrix(lightObject.transform.position, lightObject.parent.matrix);
3680                   if(display.display3D.camera)
3681                      positionVector.Subtract(positionVector, display.display3D.camera.cPosition);
3682                }
3683                position[3] = 1;
3684             }
3685             else
3686             {
3687                if(!light.direction.x && !light.direction.y && !light.direction.z)
3688                {
3689                   Vector3Df vector { 0,0,-1 };
3690                   Matrix mat;
3691                   mat.RotationQuaternion(light.orientation);
3692                   positionVector.MultMatrixf(vector, mat);
3693                }
3694                else
3695                {
3696                   positionVector = light.direction;
3697                   position[3] = 1;
3698                }
3699             }
3700
3701             position[0] = (float)positionVector.x;
3702             position[1] = (float)positionVector.y;
3703             position[2] = (float)positionVector.z;
3704
3705             glLightfv(GL_LIGHT0 + id, GL_POSITION, position);
3706
3707             /*
3708             // Display Light Position
3709             glDisable(GL_LIGHTING);
3710             glDisable(GL_DEPTH_TEST);
3711             glColor3f(1,1,1);
3712             glPointSize(10);
3713             glBegin(GL_POINTS);
3714             glVertex3fv(position);
3715             glEnd();
3716             glEnable(GL_DEPTH_TEST);
3717             glEnable(GL_LIGHTING);
3718
3719
3720             // Display Target
3721             if(lightObject.flags.root || !lightObject.parent)
3722             {
3723                positionVector = light.target.transform.position;
3724                positionVector.Subtract(positionVector, display.camera.cPosition);
3725             }
3726             else
3727             {
3728                positionVector.MultMatrix(light.target.transform.position,
3729                   lightObject.light.target.parent.matrix);
3730                positionVector.Subtract(positionVector, display.camera.cPosition);
3731             }
3732
3733             position[0] = positionVector.x;
3734             position[1] = positionVector.y;
3735             position[2] = positionVector.z;
3736
3737             glDisable(GL_LIGHTING);
3738             glDisable(GL_DEPTH_TEST);
3739             glColor3f(1,1,0);
3740             glPointSize(10);
3741             glBegin(GL_POINTS);
3742             glVertex3fv(position);
3743             glEnd();
3744             glEnable(GL_DEPTH_TEST);
3745             glEnable(GL_LIGHTING);
3746             */
3747
3748             if(light.flags.attenuation)
3749             {
3750                glLightf(GL_LIGHT0 + id, GL_CONSTANT_ATTENUATION, light.Kc);
3751                glLightf(GL_LIGHT0 + id, GL_LINEAR_ATTENUATION, light.Kl);
3752                glLightf(GL_LIGHT0 + id, GL_QUADRATIC_ATTENUATION, light.Kq);
3753             }
3754
3755             if(light.flags.spot)
3756             {
3757                float exponent = 0;
3758                #define MAXLIGHT  0.9
3759                float direction[4] = { (float)light.direction.x, (float)light.direction.y, (float)light.direction.z, 1 };
3760                // Figure out exponent out of the hot spot
3761                exponent = (float)(log(MAXLIGHT) / log(cos((light.hotSpot / 2))));
3762
3763                glLightfv(GL_LIGHT0 + id, GL_SPOT_DIRECTION, direction);
3764                glLightf(GL_LIGHT0 + id, GL_SPOT_CUTOFF, (float)(light.fallOff / 2));
3765                glLightf(GL_LIGHT0 + id, GL_SPOT_EXPONENT, exponent);
3766             }
3767          }
3768          else
3769          {
3770
3771             Vector3Df vector { 0,0,-1 };
3772             Vector3Df direction;
3773             Matrix mat;
3774
3775             mat.RotationQuaternion(light.orientation);
3776             direction.MultMatrix(vector, mat);
3777
3778             position[0] = direction.x;
3779             position[1] = direction.y;
3780             position[2] = direction.z;
3781
3782             glLightfv(GL_LIGHT0 + id, GL_POSITION, position);
3783          }
3784       }
3785       else
3786          glDisable(GL_LIGHT0 + id);
3787 #endif
3788    }
3789
3790    void SetCamera(Display display, Surface surface, Camera camera)
3791    {
3792       OGLDisplay oglDisplay = display.driverData;
3793       //Logf("SetCamera\n");
3794
3795       if(camera)
3796       {
3797          int left = surface.box.left + surface.offset.x;
3798          int top = surface.box.top  + surface.offset.y;
3799          int right = surface.box.right + surface.offset.x;
3800          int bottom = surface.box.bottom + surface.offset.y;
3801          float origX = surface.offset.x + camera.origin.x;
3802          float origY = surface.offset.y + camera.origin.y;
3803          int x = left;
3804          int y = display.height - bottom - 1;
3805          int w = right - left + 1;
3806          int h = bottom - top + 1;
3807
3808          // *** ViewPort ***
3809          glViewport(x, y, w, h);
3810
3811          // *** Projection Matrix ***
3812          if(!display.display3D.camera)
3813          {
3814             glMatrixMode(GL_PROJECTION);
3815             glPushMatrix();
3816          }
3817          else
3818             glMatrixMode(GL_PROJECTION);
3819          if(display.display3D.collectingHits)
3820          {
3821             float pickX = display.display3D.pickX + surface.offset.x;
3822             float pickY = display.height - (display.display3D.pickY + surface.offset.y) - 1;
3823             Matrix pickMatrix
3824             {
3825                {
3826                   w / display.display3D.pickWidth, 0, 0, 0,
3827                   0, h / display.display3D.pickHeight, 0, 0,
3828                   0, 0, 1, 0,
3829                   (w + 2.0f * (x - pickX)) / display.display3D.pickWidth,
3830                   (h + 2.0f * (y - pickY)) / display.display3D.pickHeight, 0, 1
3831                }
3832             };
3833             glLoadMatrixd(pickMatrix.array);
3834          }
3835          else
3836             glLoadIdentity();
3837          glFrustum(
3838             (left   - origX) * camera.zMin / camera.focalX,
3839             (right  - origX) * camera.zMin / camera.focalX,
3840             (bottom - origY) * camera.zMin / camera.focalY,
3841             (top    - origY) * camera.zMin / camera.focalY,
3842             camera.zMin, camera.zMax);
3843
3844          glDisable(GL_BLEND);
3845
3846          // *** Z Inverted Identity Matrix ***
3847          glMatrixMode(GL_MODELVIEW);
3848          if(!display.display3D.camera)
3849             glPushMatrix();
3850
3851          glLoadIdentity();
3852
3853          glScaled(1.0/nearPlane, 1.0/nearPlane, -1.0/nearPlane);
3854
3855          // *** View Matrix ***
3856          glMultMatrixd(camera.viewMatrix.array);
3857
3858          // *** Lights ***
3859          // ...
3860
3861          glEnable(GL_DEPTH_TEST);
3862 //#if !defined(EM_MODE)
3863          glEnable(GL_LIGHTING);
3864          glShadeModel(GL_SMOOTH);
3865 //#endif
3866          glDepthMask((byte)bool::true);
3867          oglDisplay.depthWrite = true;
3868
3869          glEnable(GL_MULTISAMPLE_ARB);
3870       }
3871       else if(display.display3D.camera)
3872       {
3873          oglDisplay.depthWrite = false;
3874          glViewport(0,0,display.width,display.height);
3875
3876          glDisable(GL_CULL_FACE);
3877          glDisable(GL_DEPTH_TEST);
3878          glDisable(GL_LIGHTING);
3879          glDisable(GL_FOG);
3880          glDisable(GL_TEXTURE_2D);
3881 //#if !defined(EM_MODE)
3882          glShadeModel(GL_FLAT);
3883 //#endif
3884          glEnable(GL_BLEND);
3885          glDisable(GL_MULTISAMPLE_ARB);
3886
3887          // *** Restore 2D MODELVIEW Matrix ***
3888          glPopMatrix();
3889
3890          // *** Restore 2D PROJECTION Matrix ***
3891          glMatrixMode(GL_PROJECTION);
3892          glPopMatrix();
3893       }
3894
3895    }
3896
3897    void ApplyMaterial(Display display, Material material, Mesh mesh)
3898    {
3899       //Logf("ApplyMaterial\n");
3900
3901       // Basic Properties
3902       if(material.flags.doubleSided)
3903       {
3904 #if !defined(EM_MODE)
3905          glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, !material.flags.singleSideLight);
3906 #endif
3907          glDisable(GL_CULL_FACE);
3908       }
3909       else
3910       {
3911 #if !defined(EM_MODE)
3912          glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, bool::false);
3913 #endif
3914          glEnable(GL_CULL_FACE);
3915       }
3916
3917       // Fog
3918       if(material.flags.noFog)
3919          glDisable(GL_FOG);
3920       else
3921          glEnable(GL_FOG);
3922
3923       // Maps
3924       if(material.baseMap && (mesh.texCoords || mesh.flags.texCoords1))
3925       {
3926          Bitmap map = material.baseMap;
3927          glEnable(GL_TEXTURE_2D);
3928          glBindTexture(GL_TEXTURE_2D, (GLuint)(uintptr)map.driverData);
3929
3930          glMatrixMode(GL_TEXTURE);
3931          glLoadIdentity();
3932          if(material.uScale && material.vScale)
3933             glScalef(material.uScale, material.vScale, 1);
3934          glMatrixMode(GL_MODELVIEW);
3935
3936          if(material.flags.tile)
3937          {
3938             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
3939             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
3940          }
3941          else
3942          {
3943             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
3944             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
3945          }
3946       }
3947       else
3948          glDisable(GL_TEXTURE_2D);
3949
3950 #ifdef EM_MODE
3951       glColor4f(material.diffuse.r, material.diffuse.g, material.diffuse.b, material.opacity);
3952 #else
3953       if(mesh.flags.colors)
3954       {
3955          glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
3956          glEnable(GL_COLOR_MATERIAL);
3957       }
3958       else
3959       {
3960          glDisable(GL_COLOR_MATERIAL);
3961          {
3962             float color[4] = { material.diffuse.r, material.diffuse.g, material.diffuse.b, material.opacity };
3963             glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, color);
3964          }
3965          {
3966             float color[4] = { material.ambient.r, material.ambient.g, material.ambient.b, 0 };
3967             glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, color);
3968          }
3969       }
3970       {
3971          float color[4] = { material.specular.r, material.specular.g, material.specular.b, 0 };
3972          glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, color);
3973       }
3974       {
3975          float color[4] = { material.emissive.r, material.emissive.g, material.emissive.b, 0 };
3976          glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, color);
3977       }
3978
3979       glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, &material.power);
3980 #endif
3981    }
3982
3983    void FreeMesh(DisplaySystem displaySystem, Mesh mesh)
3984    {
3985       OGLMesh oglMesh = mesh.data;
3986       if(oglMesh)
3987       {
3988          if(!mesh.flags.vertices)
3989          {
3990             oglMesh.vertices.free();
3991             delete mesh.vertices;
3992          }
3993          if(!mesh.flags.normals)
3994          {
3995             oglMesh.normals.free();
3996             delete mesh.normals;
3997          }
3998          if(!mesh.flags.texCoords1)
3999          {
4000             oglMesh.texCoords.free();
4001             delete mesh.texCoords;
4002          }
4003          if(!mesh.flags.texCoords2)
4004          {
4005             oglMesh.texCoords2.free();
4006             // delete mesh.texCoords2;
4007          }
4008          if(!mesh.flags.colors)
4009          {
4010             oglMesh.colors.free();
4011             delete mesh.colors;
4012          }
4013          if(!mesh.flags)
4014          {
4015             delete oglMesh;
4016             mesh.data = null;
4017          }
4018       }
4019    }
4020
4021    bool AllocateMesh(DisplaySystem displaySystem, Mesh mesh, MeshFeatures flags, int nVertices)
4022    {
4023       bool result = false;
4024
4025       if(!mesh.data)
4026          mesh.data = OGLMesh { };
4027       if(mesh.data)
4028       {
4029          if(mesh.nVertices == nVertices)
4030          {
4031             // Same number of vertices, adding features (Leaves the other features pointers alone)
4032             if(mesh.flags != flags)
4033             {
4034                if(!mesh.flags.vertices && flags.vertices)
4035                {
4036                   if(flags.doubleVertices)
4037                   {
4038                      mesh.vertices = (Vector3Df *)new Vector3D[nVertices];
4039                   }
4040                   else
4041                      mesh.vertices = new Vector3Df[nVertices];
4042                }
4043                if(!mesh.flags.normals && flags.normals)
4044                {
4045                   if(flags.doubleNormals)
4046                   {
4047                      mesh.normals = (Vector3Df *)new Vector3D[nVertices];
4048                   }
4049                   else
4050                      mesh.normals = new Vector3Df[nVertices];
4051                }
4052                if(!mesh.flags.texCoords1 && flags.texCoords1)
4053                {
4054                   mesh.texCoords = new Pointf[nVertices];
4055                }
4056                if(!mesh.flags.colors && flags.colors)
4057                {
4058                   mesh.colors = new ColorRGBAf[nVertices];
4059                }
4060             }
4061          }
4062          else
4063          {
4064             // New number of vertices, reallocate all current and new features
4065             flags |= mesh.flags;
4066             if(flags.vertices)
4067             {
4068                if(flags.doubleVertices)
4069                {
4070                   mesh.vertices = (Vector3Df *)renew mesh.vertices Vector3D[nVertices];
4071                }
4072                else
4073                   mesh.vertices = renew mesh.vertices Vector3Df[nVertices];
4074             }
4075             if(flags.normals)
4076             {
4077                if(flags.doubleNormals)
4078                {
4079                   mesh.normals = (Vector3Df *)renew mesh.normals Vector3D[nVertices];
4080                }
4081                else
4082                   mesh.normals = renew mesh.normals Vector3Df[nVertices];
4083             }
4084             if(flags.texCoords1)
4085             {
4086                mesh.texCoords = renew mesh.texCoords Pointf[nVertices];
4087             }
4088             if(flags.colors)
4089             {
4090                mesh.colors = renew mesh.colors ColorRGBAf[nVertices];
4091             }
4092          }
4093          result = true;
4094       }
4095       return result;
4096    }
4097
4098    void UnlockMesh(DisplaySystem displaySystem, Mesh mesh, MeshFeatures flags)
4099    {
4100       OGLMesh oglMesh = mesh.data;
4101       if(!flags) flags = mesh.flags;
4102
4103       if(vboAvailable)
4104       {
4105          if(flags.vertices)
4106             oglMesh.vertices.upload(
4107                mesh.nVertices * (mesh.flags.doubleVertices ? sizeof(Vector3D) : sizeof(Vector3Df)), mesh.vertices); //, GL_STATIC_DRAW_ARB );
4108
4109          if(flags.normals)
4110             oglMesh.normals.upload(
4111                mesh.nVertices * (mesh.flags.doubleNormals ? sizeof(Vector3D) : sizeof(Vector3Df)), mesh.normals); //, GL_STATIC_DRAW_ARB );
4112
4113          if(flags.texCoords1)
4114             oglMesh.texCoords.upload(
4115                mesh.nVertices * sizeof(Pointf), mesh.texCoords); //, GL_STATIC_DRAW_ARB );
4116
4117          if(flags.colors)
4118             oglMesh.colors.upload(
4119                mesh.nVertices * sizeof(ColorRGBAf), mesh.colors); //, GL_STATIC_DRAW_ARB );
4120       }
4121    }
4122
4123    bool LockMesh(DisplaySystem displaySystem, Mesh mesh, MeshFeatures flags)
4124    {
4125       bool result = true;
4126
4127         return result;
4128    }
4129
4130    void FreeIndices(DisplaySystem displaySystem, OGLIndices oglIndices)
4131    {
4132       if(oglIndices)
4133       {
4134          oglIndices.buffer.free();
4135          delete oglIndices.indices;
4136          delete oglIndices;
4137       }
4138    }
4139
4140    void * AllocateIndices(DisplaySystem displaySystem, int nIndices, bool indices32bit)
4141    {
4142       OGLIndices oglIndices = OGLIndices { };
4143       if(oglIndices)
4144       {
4145          oglIndices.indices = (void *)(indices32bit ? new uint32[nIndices] : new uint16[nIndices]);
4146          oglIndices.nIndices = nIndices;
4147       }
4148       return oglIndices;
4149    }
4150
4151    void UnlockIndices(DisplaySystem displaySystem, OGLIndices oglIndices, bool indices32bit, int nIndices)
4152    {
4153       if(vboAvailable)
4154       {
4155          oglIndices.buffer.upload(
4156             nIndices * (indices32bit ? sizeof(uint32) : sizeof(uint16)),
4157             oglIndices.indices); //GL_STATIC_DRAW_ARB);
4158       }
4159    }
4160
4161    uint16 * LockIndices(DisplaySystem displaySystem, OGLIndices oglIndices)
4162    {
4163
4164       return oglIndices.indices;
4165    }
4166
4167    void SelectMesh(Display display, Mesh mesh)
4168    {
4169       //Logf("SelectMesh\n");
4170
4171 #if !defined( __ANDROID__) && !defined(__APPLE__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
4172
4173 #if defined(__WIN32__)
4174       if(glUnlockArraysEXT)
4175 #endif
4176          if(!vboAvailable && display.display3D.mesh)
4177             glUnlockArraysEXT();
4178
4179 #endif
4180       if(mesh)
4181       {
4182          OGLMesh oglMesh = mesh.data;
4183
4184          // *** Vertex Stream ***
4185          glEnableClientState(GL_VERTEX_ARRAY);
4186          if(!display.display3D.collectingHits && oglMesh)
4187          {
4188             oglMesh.vertices.use(vertex, 3, (mesh.flags.doubleVertices ? GL_DOUBLE : GL_FLOAT), 0, oglMesh.vertices.buffer ? null : (double *)mesh.vertices);
4189
4190             // *** Normals Stream ***
4191             if(mesh.normals || mesh.flags.normals)
4192             {
4193                glEnableClientState(GL_NORMAL_ARRAY);
4194                oglMesh.normals.use(normal, 3, GL_FLOAT, 0, oglMesh.normals.buffer ? null : mesh.normals);
4195             }
4196             else
4197                glDisableClientState(GL_NORMAL_ARRAY);
4198
4199             // *** Texture Coordinates Stream ***
4200             if(mesh.texCoords || mesh.flags.texCoords1)
4201             {
4202                glEnableClientState(GL_TEXTURE_COORD_ARRAY);
4203                oglMesh.texCoords.use(texCoord, 2, GL_FLOAT, 0, oglMesh.texCoords.buffer ? null : mesh.texCoords);
4204             }
4205             else
4206                glDisableClientState(GL_TEXTURE_COORD_ARRAY);
4207
4208             // *** Color Stream ***
4209             if(mesh.colors || mesh.flags.colors)
4210             {
4211                glEnableClientState(GL_COLOR_ARRAY);
4212                oglMesh.colors.use(color, 4, GL_FLOAT, 0, oglMesh.colors.buffer ? null : mesh.colors);
4213             }
4214             else
4215                glDisableClientState(GL_COLOR_ARRAY);
4216          }
4217          else
4218          {
4219             noAB.use(vertex, 3, (mesh.flags.doubleVertices ? GL_DOUBLE : GL_FLOAT), 0, (double *)mesh.vertices);
4220             if((mesh.normals || mesh.flags.normals) && !display.display3D.collectingHits)
4221             {
4222                glEnableClientState(GL_NORMAL_ARRAY);
4223                noAB.use(normal, 3, GL_FLOAT, 0, mesh.normals);
4224             }
4225             else
4226                glDisableClientState(GL_NORMAL_ARRAY);
4227             if((mesh.texCoords || mesh.flags.texCoords1) && !display.display3D.collectingHits)
4228             {
4229                glEnableClientState(GL_TEXTURE_COORD_ARRAY);
4230                noAB.use(texCoord, 2, GL_FLOAT, 0, mesh.texCoords);
4231             }
4232             else
4233                glDisableClientState(GL_TEXTURE_COORD_ARRAY);
4234             if((mesh.colors || mesh.flags.colors) && !display.display3D.collectingHits)
4235             {
4236                glEnableClientState(GL_COLOR_ARRAY);
4237                noAB.use(color, 4, GL_FLOAT, 0, mesh.colors);
4238             }
4239             else
4240                glDisableClientState(GL_COLOR_ARRAY);
4241          }
4242
4243 #if !defined(__ANDROID__) && !defined(__APPLE__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
4244
4245 #if defined(__WIN32__)
4246          if(glLockArraysEXT)
4247 #endif
4248             if(!vboAvailable)
4249                glLockArraysEXT(0, mesh.nVertices);
4250
4251 #endif
4252       }
4253    }
4254
4255    void DrawPrimitives(Display display, PrimitiveSingle * primitive, Mesh mesh)
4256    {
4257       //Logf("DrawPrimitives\n");
4258
4259       if(primitive->type.vertexRange)
4260          glDrawArrays(primitiveTypes[primitive->type.primitiveType], primitive->first, primitive->nVertices);
4261       else
4262       {
4263          //    *** Hoping the data won't be uploaded at all (Won't really work if another group of the mesh is using the mesh ) ***
4264          // HACK TO SPEED THINGS UP...
4265 #ifndef __ANDROID__
4266          /*GLBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
4267          if(primitive->nIndices < (mesh.nVertices >> 2) && !primitive->type.indices32bit)
4268          {
4269             int c;
4270             glBegin(primitiveTypes[primitive->type.primitiveType]);
4271             if(primitive->data)
4272             {
4273                OGLIndices oglIndices = primitive->data;
4274                MeshFeatures flags = mesh.flags;
4275                for(c = 0; c<primitive->nIndices; c++)
4276                {
4277                   uint16 index = ((uint16 *) oglIndices.indices)[c];
4278                   if(flags.normals) glNormal3fv((float *)&mesh.normals[index]);
4279                   if(flags.texCoords1) glTexCoord2fv((float *)&mesh.texCoords[index]);
4280                   if(flags.colors) glColor4fv((float *)&mesh.colors[index]);
4281                   glVertex3fv((float *)&mesh.vertices[index]);
4282                }
4283             }
4284             glEnd();
4285          }
4286          else*/
4287 #endif
4288          {
4289             OGLIndices oglIndices = primitive->data;
4290
4291             if(!display.display3D.collectingHits && vboAvailable && oglIndices)
4292             {
4293                if(primitive->type.indices32bit)
4294                   ; //oglIndices.buffer.draw(primitiveTypes[primitive->type.primitiveType], primitive->nIndices, GL_UNSIGNED_SHORT, 0);
4295                else
4296                   oglIndices.buffer.draw(primitiveTypes[primitive->type.primitiveType], primitive->nIndices, GL_UNSIGNED_SHORT, 0);
4297             }
4298             else
4299             {
4300                if(primitive->type.indices32bit)
4301                   glDrawElementsi(primitiveTypes[primitive->type.primitiveType], primitive->nIndices,
4302                      oglIndices ? oglIndices.indices : primitive->indices);
4303                else
4304                   glDrawElements(primitiveTypes[primitive->type.primitiveType], primitive->nIndices,
4305                      GL_UNSIGNED_SHORT, oglIndices ? oglIndices.indices : primitive->indices);
4306             }
4307          }
4308       }
4309    }
4310
4311    void PushMatrix(Display display)
4312    {
4313       glPushMatrix();
4314    }
4315
4316    void PopMatrix(Display display, bool setMatrix)
4317    {
4318       glPopMatrix();
4319    }
4320
4321    void SetTransform(Display display, Matrix transMatrix, bool viewSpace, bool useCamera)
4322    {
4323       Matrix matrix = transMatrix;
4324       Camera camera = useCamera ? display.display3D.camera : null;
4325
4326       if(viewSpace)
4327       {
4328          glLoadIdentity();
4329          glScaled(1.0/nearPlane, 1.0/nearPlane, -1.0/nearPlane);
4330       }
4331       else if(camera)
4332       {
4333          glTranslated(
4334             matrix.m[3][0] - camera.cPosition.x,
4335             matrix.m[3][1] - camera.cPosition.y,
4336             matrix.m[3][2] - camera.cPosition.z);
4337       }
4338       else
4339          glTranslated(
4340             matrix.m[3][0],
4341             matrix.m[3][1],
4342             matrix.m[3][2]);
4343
4344       matrix.m[3][0] = 0;
4345       matrix.m[3][1] = 0;
4346       matrix.m[3][2] = 0;
4347
4348       glMultMatrixd(matrix.array);
4349    }
4350 #endif
4351 }
4352
4353 public void UseSingleGLContext(bool useSingle)
4354 {
4355    useSingleGLContext = useSingle;
4356 }
4357
4358 default dllexport void *
4359 #if defined(__WIN32__)
4360 __attribute__((stdcall))
4361 #endif
4362 IS_GLGetContext(DisplaySystem displaySystem)
4363 {
4364    if(displaySystem)
4365    {
4366 #if defined(__WIN32__)
4367       OGLSystem system = displaySystem.driverData;
4368       return system.glrc;
4369 #elif defined(__ANDROID__) || defined(__ODROID__)
4370       return eglContext;
4371 #elif defined(__EMSCRIPTEN__)
4372 #else
4373       OGLSystem system = displaySystem.driverData;
4374       return system.glContext;
4375 #endif
4376    }
4377    return null;
4378 }
4379
4380 #endif