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 #ifdef ECERE_MINIGLX
  14
  15 //#include <GL/miniglx.h>
  16
  17 #else
  18
  19 #if defined(__ANDROID__)
  20
  21 #else
  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 0x0500
  73 #define String Sting_
  74 #include <windows.h>
  75 #undef String
  76 #endif
  77
  78 #if defined(__ANDROID__)
  79
  80 #include <GLES/gl.h>
  81 #include <EGL/egl.h>
  82
  83 #else
  84
  85 #include <GL/gl.h>
  86 #include <GL/glext.h>
  87
  88 #endif
  89
  90 import "Display"
  91
  92 #if defined(__unix__) || defined(__APPLE__)
  93
  94 #ifndef __ANDROID__
  95 import "XInterface"
  96 #endif
  97
  98 #endif
  99
 100 static double nearPlane = 1;
 101
 102 #define glLoadMatrix glLoadMatrixd
 103 #define glMultMatrix glMultMatrixd
 104 #define glGetMatrix  glGetDoublev
 105 #define glTranslate glTranslated
 106 #define glScale glScaled
 107
 108 /*
 109 #define glVertex3v glVertex3dv
 110 #define glNormal3v glNormal3dv
 111 */
 112
 113 /*
 114 //#ifdef VERTEX_FORMAT_DOUBLE
 115
 116 #define glLoadMatrix glLoadMatrixd
 117 #define glMultMatrix glMultMatrixd
 118 #define glGetMatrix  glGetDoublev
 119 #define glVertex3v glVertex3dv
 120 #define glNormal3v glNormal3dv
 121 #define glTranslate glTranslated
 122 #define glScale glScaled
 123 //#define GL_VERTEX_FORMAT   GL_DOUBLE
 124
 125 #else
 126
 127 #define glLoadMatrix glLoadMatrixf
 128 #define glMultMatrix glMultMatrixf
 129 #define glGetMatrix  glGetFloatv
 130 #define glVertex3v glVertex3fv
 131 #define glNormal3v glNormal3fv
 132 #define glTranslate glTranslatef
 133 #define glScale glScalef
 134 //#define GL_VERTEX_FORMAT   GL_FLOAT
 135
 136 #endif
 137 */
 138
 139 #define GL_ARRAY_BUFFER_ARB            0x8892
 140 #define GL_ELEMENT_ARRAY_BUFFER_ARB    0x8893
 141 #define GL_STATIC_DRAW_ARB             0x88E4
 142 #define GL_LIGHT_MODEL_COLOR_CONTROL   0x81F8
 143 #define GL_SEPARATE_SPECULAR_COLOR     0x81FA
 144
 145 #define GL_MULTISAMPLE_ARB             0x809D
 146
 147 #if defined(__WIN32__)
 148
 149 #define WGL_SAMPLE_BUFFERS_ARB              0x2041
 150 #define WGL_SAMPLES_ARB                     0x2042
 151
 152 #define  WGL_WGLEXT_VERSION   1
 153 #define  WGL_FRONT_COLOR_BUFFER_BIT_ARB   0x00000001
 154 #define  WGL_BACK_COLOR_BUFFER_BIT_ARB   0x00000002
 155 #define  WGL_DEPTH_BUFFER_BIT_ARB   0x00000004
 156 #define  WGL_STENCIL_BUFFER_BIT_ARB   0x00000008
 157 #define  WGL_NUMBER_PIXEL_FORMATS_ARB   0x2000
 158 #define  WGL_DRAW_TO_WINDOW_ARB   0x2001
 159 #define  WGL_DRAW_TO_BITMAP_ARB   0x2002
 160 #define  WGL_ACCELERATION_ARB   0x2003
 161 #define  WGL_NEED_PALETTE_ARB   0x2004
 162 #define  WGL_NEED_SYSTEM_PALETTE_ARB   0x2005
 163 #define  WGL_SWAP_LAYER_BUFFERS_ARB   0x2006
 164 #define  WGL_SWAP_METHOD_ARB   0x2007
 165 #define  WGL_NUMBER_OVERLAYS_ARB   0x2008
 166 #define  WGL_NUMBER_UNDERLAYS_ARB   0x2009
 167 #define  WGL_TRANSPARENT_ARB   0x200A
 168 #define  WGL_TRANSPARENT_RED_VALUE_ARB   0x2037
 169 #define  WGL_TRANSPARENT_GREEN_VALUE_ARB   0x2038
 170 #define  WGL_TRANSPARENT_BLUE_VALUE_ARB   0x2039
 171 #define  WGL_TRANSPARENT_ALPHA_VALUE_ARB   0x203A
 172 #define  WGL_TRANSPARENT_INDEX_VALUE_ARB   0x203B
 173 #define  WGL_SHARE_DEPTH_ARB   0x200C
 174 #define  WGL_SHARE_STENCIL_ARB   0x200D
 175 #define  WGL_SHARE_ACCUM_ARB   0x200E
 176 #define  WGL_SUPPORT_GDI_ARB   0x200F
 177 #define  WGL_SUPPORT_OPENGL_ARB   0x2010
 178 #define  WGL_DOUBLE_BUFFER_ARB   0x2011
 179 #define  WGL_STEREO_ARB   0x2012
 180 #define  WGL_PIXEL_TYPE_ARB   0x2013
 181 #define  WGL_COLOR_BITS_ARB   0x2014
 182 #define  WGL_RED_BITS_ARB   0x2015
 183 #define  WGL_RED_SHIFT_ARB   0x2016
 184 #define  WGL_GREEN_BITS_ARB   0x2017
 185 #define  WGL_GREEN_SHIFT_ARB   0x2018
 186 #define  WGL_BLUE_BITS_ARB   0x2019
 187 #define  WGL_BLUE_SHIFT_ARB   0x201A
 188 #define  WGL_ALPHA_BITS_ARB   0x201B
 189 #define  WGL_ALPHA_SHIFT_ARB   0x201C
 190 #define  WGL_ACCUM_BITS_ARB   0x201D
 191 #define  WGL_ACCUM_RED_BITS_ARB   0x201E
 192 #define  WGL_ACCUM_GREEN_BITS_ARB   0x201F
 193 #define  WGL_ACCUM_BLUE_BITS_ARB   0x2020
 194 #define  WGL_ACCUM_ALPHA_BITS_ARB   0x2021
 195 #define  WGL_DEPTH_BITS_ARB   0x2022
 196 #define  WGL_STENCIL_BITS_ARB   0x2023
 197 #define  WGL_AUX_BUFFERS_ARB   0x2024
 198 #define  WGL_NO_ACCELERATION_ARB   0x2025
 199 #define  WGL_GENERIC_ACCELERATION_ARB   0x2026
 200 #define  WGL_FULL_ACCELERATION_ARB   0x2027
 201 #define  WGL_SWAP_EXCHANGE_ARB   0x2028
 202 #define  WGL_SWAP_COPY_ARB   0x2029
 203 #define  WGL_SWAP_UNDEFINED_ARB   0x202A
 204 #define  WGL_TYPE_RGBA_ARB   0x202B
 205 #define  WGL_TYPE_COLORINDEX_ARB   0x202C
 206 #define  ERROR_INVALID_PIXEL_TYPE_ARB   0x2043
 207 #define  ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB   0x2054
 208 #define  WGL_DRAW_TO_PBUFFER_ARB   0x202D
 209 #define  WGL_MAX_PBUFFER_PIXELS_ARB   0x202E
 210 #define  WGL_MAX_PBUFFER_WIDTH_ARB   0x202F
 211 #define  WGL_MAX_PBUFFER_HEIGHT_ARB   0x2030
 212 #define  WGL_PBUFFER_LARGEST_ARB   0x2033
 213 #define  WGL_PBUFFER_WIDTH_ARB   0x2034
 214 #define  WGL_PBUFFER_HEIGHT_ARB   0x2035
 215 #define  WGL_PBUFFER_LOST_ARB   0x2036
 216 #define  ERROR_INVALID_PIXEL_TYPE_EXT   0x2043
 217 #define  WGL_NUMBER_PIXEL_FORMATS_EXT   0x2000
 218 #define  WGL_DRAW_TO_WINDOW_EXT   0x2001
 219 #define  WGL_DRAW_TO_BITMAP_EXT   0x2002
 220 #define  WGL_ACCELERATION_EXT   0x2003
 221 #define  WGL_NEED_PALETTE_EXT   0x2004
 222 #define  WGL_NEED_SYSTEM_PALETTE_EXT   0x2005
 223 #define  WGL_SWAP_LAYER_BUFFERS_EXT   0x2006
 224 #define  WGL_SWAP_METHOD_EXT   0x2007
 225 #define  WGL_NUMBER_OVERLAYS_EXT   0x2008
 226 #define  WGL_NUMBER_UNDERLAYS_EXT   0x2009
 227 #define  WGL_TRANSPARENT_EXT   0x200A
 228 #define  WGL_TRANSPARENT_VALUE_EXT   0x200B
 229 #define  WGL_SHARE_DEPTH_EXT   0x200C
 230 #define  WGL_SHARE_STENCIL_EXT   0x200D
 231 #define  WGL_SHARE_ACCUM_EXT   0x200E
 232 #define  WGL_SUPPORT_GDI_EXT   0x200F
 233 #define  WGL_SUPPORT_OPENGL_EXT   0x2010
 234 #define  WGL_DOUBLE_BUFFER_EXT   0x2011
 235 #define  WGL_STEREO_EXT   0x2012
 236 #define  WGL_PIXEL_TYPE_EXT   0x2013
 237 #define  WGL_COLOR_BITS_EXT   0x2014
 238 #define  WGL_RED_BITS_EXT   0x2015
 239 #define  WGL_RED_SHIFT_EXT   0x2016
 240 #define  WGL_GREEN_BITS_EXT   0x2017
 241 #define  WGL_GREEN_SHIFT_EXT   0x2018
 242 #define  WGL_BLUE_BITS_EXT   0x2019
 243 #define  WGL_BLUE_SHIFT_EXT   0x201A
 244 #define  WGL_ALPHA_BITS_EXT   0x201B
 245 #define  WGL_ALPHA_SHIFT_EXT   0x201C
 246 #define  WGL_ACCUM_BITS_EXT   0x201D
 247 #define  WGL_ACCUM_RED_BITS_EXT   0x201E
 248 #define  WGL_ACCUM_GREEN_BITS_EXT   0x201F
 249 #define  WGL_ACCUM_BLUE_BITS_EXT   0x2020
 250 #define  WGL_ACCUM_ALPHA_BITS_EXT   0x2021
 251 #define  WGL_DEPTH_BITS_EXT   0x2022
 252 #define  WGL_STENCIL_BITS_EXT   0x2023
 253 #define  WGL_AUX_BUFFERS_EXT   0x2024
 254 #define  WGL_NO_ACCELERATION_EXT   0x2025
 255 #define  WGL_GENERIC_ACCELERATION_EXT   0x2026
 256 #define  WGL_FULL_ACCELERATION_EXT   0x2027
 257 #define  WGL_SWAP_EXCHANGE_EXT   0x2028
 258 #define  WGL_SWAP_COPY_EXT   0x2029
 259 #define  WGL_SWAP_UNDEFINED_EXT   0x202A
 260 #define  WGL_TYPE_RGBA_EXT   0x202B
 261 #define  WGL_TYPE_COLORINDEX_EXT   0x202C
 262 #define  WGL_DRAW_TO_PBUFFER_EXT   0x202D
 263 #define  WGL_MAX_PBUFFER_PIXELS_EXT   0x202E
 264 #define  WGL_MAX_PBUFFER_WIDTH_EXT   0x202F
 265 #define  WGL_MAX_PBUFFER_HEIGHT_EXT   0x2030
 266 #define  WGL_OPTIMAL_PBUFFER_WIDTH_EXT   0x2031
 267 #define  WGL_OPTIMAL_PBUFFER_HEIGHT_EXT   0x2032
 268 #define  WGL_PBUFFER_LARGEST_EXT   0x2033
 269 #define  WGL_PBUFFER_WIDTH_EXT   0x2034
 270 #define  WGL_PBUFFER_HEIGHT_EXT   0x2035
 271 #define  WGL_DEPTH_FLOAT_EXT   0x2040
 272 #define  WGL_SAMPLE_BUFFERS_3DFX   0x2060
 273 #define  WGL_SAMPLES_3DFX   0x2061
 274 #define  WGL_SAMPLE_BUFFERS_EXT   0x2041
 275 #define  WGL_SAMPLES_EXT   0x2042
 276 #define  WGL_GENLOCK_SOURCE_MULTIVIEW_I3D   0x2044
 277 #define  WGL_GENLOCK_SOURCE_EXTENAL_SYNC_I3D   0x2045
 278 #define  WGL_GENLOCK_SOURCE_EXTENAL_FIELD_I3D   0x2046
 279 #define  WGL_GENLOCK_SOURCE_EXTENAL_TTL_I3D   0x2047
 280 #define  WGL_GENLOCK_SOURCE_DIGITAL_SYNC_I3D   0x2048
 281 #define  WGL_GENLOCK_SOURCE_DIGITAL_FIELD_I3D   0x2049
 282 #define  WGL_GENLOCK_SOURCE_EDGE_FALLING_I3D   0x204A
 283 #define  WGL_GENLOCK_SOURCE_EDGE_RISING_I3D   0x204B
 284 #define  WGL_GENLOCK_SOURCE_EDGE_BOTH_I3D   0x204C
 285 #define  WGL_GAMMA_TABLE_SIZE_I3D   0x204E
 286 #define  WGL_GAMMA_EXCLUDE_DESKTOP_I3D   0x204F
 287 #define  WGL_DIGITAL_VIDEO_CURSOR_ALPHA_FRAMEBUFFER_I3D   0x2050
 288 #define  WGL_DIGITAL_VIDEO_CURSOR_ALPHA_VALUE_I3D   0x2051
 289 #define  WGL_DIGITAL_VIDEO_CURSOR_INCLUDED_I3D   0x2052
 290 #define  WGL_DIGITAL_VIDEO_GAMMA_CORRECTED_I3D   0x2053
 291 #define  WGL_ARB_buffer_region   1
 292 #define  WGL_ARB_extensions_string   1
 293 #define  WGL_ARB_pixel_format   1
 294 #define  WGL_ARB_make_current_read   1
 295 #define  WGL_ARB_pbuffer   1
 296 #define  WGL_EXT_display_color_table   1
 297 #define  WGL_EXT_extensions_string   1
 298 #define  WGL_EXT_make_current_read   1
 299 #define  WGL_EXT_pbuffer   1
 300 #define  WGL_EXT_pixel_format   1
 301 #define  WGL_EXT_swap_control   1
 302 #define  WGL_WGL_EXT_depth_float   1
 303 #define  WGL_WGL_3DFX_multisample   1
 304 #define  WGL_WGL_EXT_multisample   1
 305 #define  WGL_NV_allocate_memory   1
 306
 307 /*
 308 typedef void (APIENTRY * PFNGLACTIVETEXTUREARBPROC) (GLenum target);
 309 typedef void (APIENTRY * PFNGLMULTITEXCOORD2FARBPROC) (GLenum target, GLfloat s, GLfloat t);
 310 typedef void (APIENTRY * PFNGLCLIENTACTIVETEXTUREARBPROC) (GLenum target);
 311 typedef void (APIENTRY * PFNGLLOCKARRAYSEXTPROC) (GLint first, GLsizei count);
 312 typedef void (APIENTRY * PFNGLUNLOCKARRAYSEXTPROC) (void);
 313 */
 314
 315 /*
 316 typedef int (APIENTRY * PFNGLBINDBUFFERARBPROC) (GLenum target, GLuint buffer);
 317 typedef int (APIENTRY * PFNGLDELETEBUFFERSARBPROC) (GLsizei n, const GLuint *buffers);
 318 typedef int (APIENTRY * PFNGLGENBUFFERSARBPROC) (GLsizei n, GLuint *buffers);
 319 typedef int (APIENTRY * PFNGLBUFFERDATAARBPROC) (GLenum target, int size, const GLvoid *data, GLenum usage);
 320 */
 321 typedef int (APIENTRY * PFNWGLCHOOSEPIXELFORMATARBPROC) ();
 322 typedef void * (APIENTRY * PFNWGLCREATEPBUFFERARBPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
 323 typedef HDC (APIENTRY * PFNWGLGETPBUFFERDCARBPROC) (void * hPbuffer);
 324 typedef int (APIENTRY * PFNWGLRELEASEPBUFFERDCARBPROC) (void * hPbuffer, HDC hDC);
 325 typedef BOOL (APIENTRY * PFNWGLDESTROYPBUFFERARBPROC) (void * hPbuffer);
 326 typedef BOOL (APIENTRY * PFNWGLQUERYPBUFFERARBPROC) (void * hPbuffer, int iAttribute, int *piValue);
 327
 328 static PFNGLMAPBUFFERARBPROC glMapBufferARB = null;
 329 static PFNGLUNMAPBUFFERARBPROC glUnmapBufferARB = null;
 330 static PFNGLACTIVETEXTUREARBPROC glActiveTextureARB = null;
 331 static PFNGLMULTITEXCOORD2FARBPROC glMultiTexCoord2fARB = null;
 332 static PFNGLCLIENTACTIVETEXTUREARBPROC glClientActiveTextureARB = null;
 333 static PFNGLLOCKARRAYSEXTPROC glLockArraysEXT = null;
 334 static PFNGLUNLOCKARRAYSEXTPROC glUnlockArraysEXT = null;
 335 static PFNGLBLENDFUNCSEPARATEPROC glBlendFuncSeparate = null;
 336
 337 static PFNGLGENBUFFERSARBPROC glGenBuffersARB = null;
 338 static PFNGLBINDBUFFERARBPROC glBindBufferARB = null;
 339 static PFNGLBUFFERDATAARBPROC glBufferDataARB = null;
 340 static PFNGLDELETEBUFFERSARBPROC glDeleteBuffersARB = null;
 341 static PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB = null;
 342 static PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = null;
 343 static PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB = null;
 344 static PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB = null;
 345 static PFNWGLQUERYPBUFFERARBPROC wglQueryPbufferARB = null;
 346 static PFNWGLDESTROYPBUFFERARBPROC wglDestroyPbufferARB = null;
 347 static PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB = null;
 348 static PFNWGLBINDTEXIMAGEARBPROC wglBindTexImageARB = null;
 349 static PFNWGLRELEASETEXIMAGEARBPROC wglReleaseTexImageARB = null;
 350
 351 #ifdef WGL_WGLEXT_PROTOTYPES
 352 extern BOOL WINAPI wglSwapIntervalEXT (int);
 353 extern int WINAPI wglGetSwapIntervalEXT (void);
 354 #endif /* WGL_WGLEXT_PROTOTYPES */
 355 typedef BOOL (WINAPI * PFNWGLSWAPINTERVALEXTPROC) (int interval);
 356 typedef int (WINAPI * PFNWGLGETSWAPINTERVALEXTPROC) (void);
 357
 358 static PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT = NULL;
 359
 360 #else
 361
 362 #if defined(__ANDROID__)
 363
 364 // Our own matrix stack
 365 static Matrix matrixStack[3][32];
 366 static int matrixIndex[3];
 367 static int curStack = 0;
 368
 369 // OpenGL ES Porting Kit
 370
 371 #define glBindFramebuffer        glBindFramebufferOES
 372 #define glBindRenderbuffer       glBindRenderbufferOES
 373 #define GL_FRAMEBUFFER           GL_FRAMEBUFFER_OES
 374 #define GL_RENDERBUFFER          GL_RENDERBUFFER_OES
 375 #define glFramebufferTexture2D   glFramebufferTexture2DOES
 376 #define GL_COLOR_ATTACHMENT0     GL_COLOR_ATTACHMENT0_OES
 377 #define glGenFramebuffers        glGenFramebuffersOES
 378 #define glGenRenderbuffers       glGenRenderbuffersOES
 379 #define glDeleteFramebuffers     glDeleteFramebuffersOES
 380 #define glDeleteRenderbuffers    glDeleteRenderbuffersOES
 381
 382 #define GL_POLYGON_STIPPLE 0xFFFF
 383 #define GL_LINE_STIPPLE 0xFFFF
 384 #define GL_LINE 0xFFFF
 385 #define GL_FILL 0xFFFF
 386 #define GL_ALL_ATTRIB_BITS 0xFFFF
 387 #define GL_LIGHT_MODEL_LOCAL_VIEWER 0xFFFF
 388 #define glDrawElementsi(type, count, start)  glDrawElements(type, count, GL_UNSIGNED_SHORT, start)
 389
 390 #define GL_UNSIGNED_INT                         0x1405
 391 #define GL_DOUBLE                               0x140A
 392
 393 #define GL_POLYGON      9
 394 #define GL_QUADS        7
 395
 396 #define glBufferDatai         glesBufferDatai
 397 #define glBufferDatad         glesBufferDatad
 398 #define glVertexPointeri      glesVertexPointeri
 399 #define glVertexPointerd      glesVertexPointerd
 400
 401 #define glRecti               glesRecti
 402 #define glBegin               glesBegin
 403 #define glTexCoord2i          glesTexCoord2i
 404 #define glVertex2i            glesVertex2i
 405 #define glTexCoord2d          glesTexCoord2d
 406 #define glVertex2d            glesVertex2d
 407 #define glTexCoord2f          glesTexCoord2f
 408 #define glVertex2f            glesVertex2f
 409 #define glEnd                 glesEnd
 410 #define glColor3f             glesColor3f
 411 #define glColor4ub            glesColor4ub
 412 #define glColor4fv            glesColor4fv
 413 #define glLineStipple         glesLineStipple
 414 #define glNormal3fv           glesNormal3fv
 415 #define glTexCoord2fv         glesTexCoord2fv
 416 #define glColorMaterial       glesColorMaterial
 417
 418 #define glLoadMatrixd         glesLoadMatrixd
 419 #define glMultMatrixd         glesMultMatrixd
 420 #define glFrustum             glesFrustum
 421 #define glOrtho               glesOrtho
 422 #define glScaled              glesScaled
 423 #define glTranslated          glesTranslated
 424 #define glRotated             glesRotated
 425 #define glVertex3d            glesVertex3d
 426 #define glVertex3f            glesVertex3f
 427 #define glVertex3fv           glesVertex3fv
 428 #define glLightModeli         glesLightModeli
 429
 430 #define APIENTRY
 431 //#define GL_QUADS              0
 432 #define GL_QUAD_STRIP         0
 433 //#define GL_DOUBLE             0
 434 //#define GL_UNSIGNED_INT       0
 435 //#define GL_FILL               0
 436 //#define GL_LINE               0
 437 //#define GL_LINE_STIPPLE       0
 438 #define GL_BGRA_EXT           0
 439 #define GL_UNPACK_ROW_LENGTH  0
 440 #define GL_UNPACK_SKIP_PIXELS 0
 441 #define GL_UNPACK_SKIP_ROWS   0
 442 #define GL_RGBA8              0
 443 #define GL_PACK_ROW_LENGTH    0
 444 #define GL_PACK_SKIP_ROWS     0
 445 #define GL_PACK_SKIP_PIXELS   0
 446
 447 static EGLDisplay eglDisplay;
 448 static EGLSurface eglSurface;
 449 static EGLContext eglContext;
 450 static int eglWidth, eglHeight;
 451
 452 static bool egl_init_display(ANativeWindow* window)
 453 {
 454    const EGLint attribs[] =
 455    {
 456       EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 457       EGL_BLUE_SIZE, 8,
 458       EGL_GREEN_SIZE, 8,
 459       EGL_RED_SIZE, 8,
 460       EGL_DEPTH_SIZE, 24,
 461       /*EGL_SAMPLE_BUFFERS, 1,
 462       EGL_SAMPLES, 0, //2,*/
 463       EGL_NONE
 464    };
 465    EGLint w, h, dummy, format;
 466    EGLint numConfigs;
 467    EGLConfig config;
 468    EGLSurface surface;
 469    EGLContext context;
 470
 471    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
 472    eglInitialize(display, 0, 0);
 473    eglChooseConfig(display, attribs, &config, 1, &numConfigs);
 474    eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &format);
 475
 476    surface = eglCreateWindowSurface(display, config, window, null);
 477    context = eglCreateContext(display, config, null, null);
 478
 479    if(!eglMakeCurrent(display, surface, surface, context))
 480       return false;
 481
 482    eglQuerySurface(display, surface, EGL_WIDTH, &w);
 483    eglQuerySurface(display, surface, EGL_HEIGHT, &h);
 484
 485    eglDisplay = display;
 486    eglContext = context;
 487    eglSurface = surface;
 488    eglWidth = w;
 489    eglHeight = h;
 490
 491    glEnableClientState(GL_VERTEX_ARRAY);
 492    /*
 493    // Initialize GL state.
 494    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
 495    glEnable(GL_CULL_FACE);
 496    glShadeModel(GL_SMOOTH);
 497    glDisable(GL_DEPTH_TEST);
 498    */
 499    glDisable(GL_CULL_FACE);
 500    glDisable(GL_DEPTH_TEST);
 501
 502    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 503    glEnable(GL_BLEND);
 504
 505    matrixStack[0][0].Identity();
 506    matrixStack[1][0].Identity();
 507    matrixStack[2][0].Identity();
 508
 509    glesMatrixMode(GL_MODELVIEW);
 510    glScaled(1.0, 1.0, -1.0);
 511    glesMatrixMode(GL_PROJECTION);
 512    glShadeModel(GL_FLAT);
 513
 514    glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 515    glFogi(GL_FOG_MODE, GL_EXP);
 516    glFogf(GL_FOG_DENSITY, 0);
 517    glEnable(GL_NORMALIZE);
 518    glDepthFunc(GL_LESS);
 519    glClearDepth(1.0);
 520    glDisable(GL_MULTISAMPLE_ARB);
 521
 522    glViewport(0,0,w,h);
 523    glesLoadIdentity();
 524    glOrtho(0,w,h,0,0.0,1.0);
 525
 526    currentVertexBuffer = 0;
 527    return true;
 528 }
 529
 530 static void egl_term_display()
 531 {
 532    if(stippleTexture)
 533    {
 534       glDeleteTextures(1, &stippleTexture);
 535       stippleTexture = 0;
 536    }
 537    if(eglDisplay != EGL_NO_DISPLAY)
 538    {
 539       eglMakeCurrent(eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
 540       if(eglContext != EGL_NO_CONTEXT)
 541          eglDestroyContext(eglDisplay, eglContext);
 542       if(eglSurface != EGL_NO_SURFACE)
 543          eglDestroySurface(eglDisplay, eglSurface);
 544       eglTerminate(eglDisplay);
 545    }
 546    eglDisplay = EGL_NO_DISPLAY;
 547    eglContext = EGL_NO_CONTEXT;
 548    eglSurface = EGL_NO_SURFACE;
 549 }
 550
 551 // OpenGL Immediate Mode Porting Kit
 552 static int beginCount;
 553 static int vertexCount;
 554 static int normalCount;
 555 static float *vertexPointer;
 556 static float *normalPointer;
 557 static GLenum beginMode;
 558 static unsigned int beginBufferSize, normalBufferSize;
 559 static int numVertexCoords = 2;
 560
 561 void glesRecti(int a, int b, int c, int d)
 562 {
 563    glBegin(GL_QUADS);
 564    glVertex2i(a, b);
 565    glVertex2i(a, d);
 566    glVertex2i(c, d);
 567    glVertex2i(c, b);
 568    glEnd();
 569 }
 570
 571 void glesBegin(GLenum mode)
 572 {
 573    beginMode = mode;
 574    beginCount = 0;
 575    vertexCount = 0;
 576    if(!vertexPointer)
 577    {
 578       normalBufferSize = beginBufferSize = 1024;  // default number of vertices
 579       vertexPointer = new float[beginBufferSize * 5];
 580       normalPointer = new float[normalBufferSize * 3];
 581    }
 582 }
 583
 584 void glesTexCoord2f(float x, float y)
 585 {
 586    int count = vertexCount;
 587
 588    if(vertexCount + numVertexCoords > beginBufferSize)
 589    {
 590       beginBufferSize = beginBufferSize + beginBufferSize/2;
 591       vertexPointer = renew vertexPointer float[beginBufferSize * 5];
 592    }
 593
 594    vertexPointer[count*(2+numVertexCoords)  ] = x;
 595    vertexPointer[count*(2+numVertexCoords)+1] = y;
 596    count++;
 597
 598    if(beginMode == GL_QUADS && ((beginCount % 4) == 3))
 599    {
 600       vertexPointer[count*(2+numVertexCoords)  ] = vertexPointer[(count-4)*(2+numVertexCoords)];
 601       vertexPointer[count*(2+numVertexCoords)+1] = vertexPointer[(count-4)*(2+numVertexCoords)+1];
 602       count++;
 603       vertexPointer[count*(2+numVertexCoords)  ] = vertexPointer[(count-3)*(2+numVertexCoords)];
 604       vertexPointer[count*(2+numVertexCoords)+1] = vertexPointer[(count-3)*(2+numVertexCoords)+1];
 605       count++;
 606    }
 607 }
 608 void glesTexCoord2i(int x, int y)       { glesTexCoord2f((float)x, (float)y); }
 609 void glesTexCoord2d(double x, double y) { glesTexCoord2f((float)x, (float)y); }
 610 void glesTexCoord2fv(float * a)         { glesTexCoord2f(a[0], a[1]); }
 611
 612 void glesVertex2f(float x, float y)
 613 {
 614    numVertexCoords = 2;
 615    if(vertexCount + 4 > beginBufferSize)
 616    {
 617       beginBufferSize = beginBufferSize + beginBufferSize/2;
 618       vertexPointer = renew vertexPointer float[beginBufferSize * 5];
 619    }
 620
 621    vertexPointer[vertexCount*4+2] = x;
 622    vertexPointer[vertexCount*4+3] = y;
 623    vertexCount++;
 624
 625    if(beginMode == GL_QUADS && ((beginCount % 4) == 3))
 626    {
 627       vertexPointer[vertexCount*4+2] = vertexPointer[(vertexCount-4)*4+2];
 628       vertexPointer[vertexCount*4+3] = vertexPointer[(vertexCount-4)*4+3];
 629       vertexCount++;
 630       vertexPointer[vertexCount*4+2] = vertexPointer[(vertexCount-3)*4+2];
 631       vertexPointer[vertexCount*4+3] = vertexPointer[(vertexCount-3)*4+3];
 632       vertexCount++;
 633    }
 634    beginCount++;
 635 }
 636 void glesVertex2i(int x, int y)         { glesVertex2f((float)x, (float)y); }
 637 void glesVertex2d(double x, double y)   { glesVertex2f((float)x, (float)y); }
 638
 639 void glesEnd(void)
 640 {
 641    int mode = beginMode;
 642    if(mode == GL_QUADS)        mode = GL_TRIANGLES;
 643    else if(mode == GL_POLYGON) mode = GL_TRIANGLE_FAN;
 644    GLSelectVBO(0);
 645    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 646    glTexCoordPointer(numVertexCoords, GL_FLOAT, (numVertexCoords+2)*sizeof(float),vertexPointer);
 647    glVertexPointer  (numVertexCoords, GL_FLOAT, (numVertexCoords+2)*sizeof(float),vertexPointer+2);
 648    if(normalCount && normalCount == vertexCount)
 649    {
 650       glEnableClientState(GL_NORMAL_ARRAY);
 651       glNormalPointer  (GL_FLOAT, 3*sizeof(float),normalPointer);
 652    }
 653
 654    glDrawArrays(mode, 0, vertexCount);
 655    if(normalCount)
 656       glDisableClientState(GL_NORMAL_ARRAY);
 657    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 658    normalCount = 0;
 659 }
 660
 661 // Vertex Pointer
 662 static float *floatVPBuffer = null;
 663 static short *shortVPBuffer = null;
 664 static unsigned int shortVPSize = 0, floatVPSize = 0;
 665
 666 // Buffer Data
 667 //static float *floatVPBuffer = null;  // For floats we reuse floatVPBuffer
 668 static unsigned short *shortBDBuffer = null;
 669 static unsigned int shortBDSize = 0/*, floatVPSize = 0*/;
 670
 671 void glesVertexPointeri(int numCoords, int stride, int *pointer, int numVertices)
 672 {
 673    if(pointer)
 674    {
 675       int i;
 676       if(numVertices*numCoords > shortVPSize)
 677       {
 678          shortVPSize = numVertices*numCoords;
 679          shortVPBuffer = renew shortVPBuffer short[shortVPSize];
 680       }
 681       for(i = 0; i < numVertices*numCoords; i++)
 682          shortVPBuffer[i] = (short)pointer[i];
 683       glVertexPointer(numCoords, GL_SHORT, stride, shortVPBuffer);
 684    }
 685    else
 686       glVertexPointer(numCoords, GL_SHORT, stride, 0);
 687 }
 688
 689 void glesVertexPointerd(int numCoords, int stride, double *pointer, int numVertices)
 690 {
 691    if(pointer)
 692    {
 693       int i;
 694       if(numVertices*numCoords > floatVPSize)
 695       {
 696          floatVPSize = numVertices*numCoords;
 697          floatVPBuffer = renew floatVPBuffer float[floatVPSize];
 698       }
 699       for(i = 0; i < numVertices*numCoords; i++)
 700          floatVPBuffer[i] = (float)pointer[i];
 701       glVertexPointer(numCoords, GL_FLOAT, stride, floatVPBuffer);
 702    }
 703    else
 704       glVertexPointer(numCoords, GL_FLOAT, stride, 0);
 705 }
 706
 707 void glesTexReuseIntVP(int numCoords)
 708 {
 709    glTexCoordPointer(numCoords, GL_SHORT, 0, floatVPBuffer);
 710 }
 711
 712 void glesTexReuseDoubleVP(int numCoords)
 713 {
 714    glTexCoordPointer(numCoords, GL_FLOAT, 0, floatVPBuffer);
 715 }
 716
 717 void glesColor3f( float r, float g, float b )
 718 {
 719    glColor4f(r, g, b, 1.0f);
 720 }
 721
 722 void glesColor4ub(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
 723 {
 724    glColor4f(r/255.0f, g/255.0f, b/255.0f, a/255.0f);
 725 }
 726
 727 void glesColor4fv(float * a)
 728 {
 729    glColor4f(a[0], a[1], a[2], a[3]);
 730 }
 731
 732 void glesBufferDatad(int target, int size, void * data, int usage)
 733 {
 734    int numElems = size/sizeof(double);
 735    double * dblPtr = (double *)data;
 736    int i;
 737    if (numElems > floatVPSize)
 738    {
 739       floatVPSize = numElems;
 740       floatVPBuffer = renew floatVPBuffer float[floatVPSize];
 741    }
 742    for (i=0; i< numElems; i++)
 743       floatVPBuffer[i] = (float)dblPtr[i];
 744
 745    glBufferData(target, numElems*sizeof(float), floatVPBuffer, usage);
 746 }
 747
 748 void glesBufferDatai(int target, int size, void * data, int usage)
 749 {
 750    int numElems = size/sizeof(unsigned int);
 751    unsigned int * pointer = (unsigned int *)data;
 752    int i;
 753    if (numElems > shortBDSize)
 754    {
 755       shortBDSize = numElems;
 756       shortBDBuffer = renew shortBDBuffer uint16[shortBDSize];
 757    }
 758    for (i=0; i< numElems; i++)
 759       shortBDBuffer[i] = (unsigned short)pointer[i];
 760
 761    glBufferData(target, numElems*sizeof(unsigned short), shortBDBuffer, usage);
 762 }
 763
 764 // *** Our Custom Matrix Stack ***
 765
 766 static void LoadCurMatrix()
 767 {
 768    double * i = matrixStack[curStack][matrixIndex[curStack]].array;
 769    float m[16] =
 770    {
 771       (float)i[0],(float)i[1],(float)i[2],(float)i[3],
 772       (float)i[4],(float)i[5],(float)i[6],(float)i[7],
 773       (float)i[8],(float)i[9],(float)i[10],(float)i[11],
 774       (float)i[12],(float)i[13],(float)i[14],(float)i[15]
 775    };
 776    glLoadMatrixf(m);
 777 }
 778
 779 void glesLoadIdentity()
 780 {
 781    matrixStack[curStack][matrixIndex[curStack]].Identity();
 782    LoadCurMatrix();
 783 }
 784
 785 void glesPushMatrix()
 786 {
 787    if(matrixIndex[curStack] + 1 < sizeof(matrixStack[0]) / sizeof(Matrix))
 788    {
 789       matrixIndex[curStack]++;
 790       memcpy(matrixStack[curStack][matrixIndex[curStack]].array, matrixStack[curStack][matrixIndex[curStack]-1].array, sizeof(Matrix));
 791    }
 792 }
 793
 794 void glesPopMatrix()
 795 {
 796    if(matrixIndex[curStack] > 0)
 797    {
 798       matrixIndex[curStack]--;
 799       LoadCurMatrix();
 800    }
 801 }
 802
 803 void glesLoadMatrixd(double * i)
 804 {
 805    memcpy(matrixStack[curStack][matrixIndex[curStack]].array, i, sizeof(Matrix));
 806    LoadCurMatrix();
 807 }
 808
 809 void glesOrtho( double l, double r, double b, double t, double n, double f )
 810 {
 811    Matrix m =
 812    { {
 813       (2 / (r - l)), 0, 0, 0,
 814       0, (2 / (t - b)), 0, 0,
 815       0, 0, (-2 / (f - n)), 0,
 816       (-(r + l) / (r - l)), (-(t + b) / (t - b)), (-(f + n) / (f - n)), 1
 817    } }, res;
 818    res.Multiply(m, matrixStack[curStack][matrixIndex[curStack]]);
 819    matrixStack[curStack][matrixIndex[curStack]] = res;
 820    LoadCurMatrix();
 821 }
 822
 823 void glesFrustum( double l, double r, double b, double t, double n, double f )
 824 {
 825    nearPlane = n;
 826    n = 1;
 827    l /= nearPlane;
 828    r /= nearPlane;
 829    b /= nearPlane;
 830    t /= nearPlane;
 831    f /= nearPlane;
 832    {
 833       double A = ((r + l) / (r - l));
 834       double B = ((t + b) / (t - b));
 835       double C = (-(f + n) / (f - n));
 836       double D = (-2*f*n/(f-n));
 837       Matrix m =
 838       { {
 839          (2.0*n / (r - l)), 0, 0, 0,
 840          0, (2.0*n / (t - b)), 0, 0,
 841          A, B,             C,-1,
 842          0, 0,             D, 0
 843       } }, res;
 844       res.Multiply(m, matrixStack[curStack][matrixIndex[curStack]]);
 845       matrixStack[curStack][matrixIndex[curStack]] = res;
 846       LoadCurMatrix();
 847    }
 848 }
 849
 850 void glesRotated( double a, double b, double c, double d )
 851 {
 852    Matrix m;
 853    Quaternion q;
 854    q.RotationAxis({(float)b,(float)-c,(float)d}, a );
 855    m.RotationQuaternion(q);
 856    matrixStack[curStack][matrixIndex[curStack]].Rotate(q);
 857    LoadCurMatrix();
 858 }
 859 void glesScaled( double a, double b, double c )
 860 {
 861    Matrix m, r;
 862
 863    m.Identity();
 864    m.Scale(a,b,c);
 865    r.Multiply(m, matrixStack[curStack][matrixIndex[curStack]]);
 866    matrixStack[curStack][matrixIndex[curStack]] = r;
 867    LoadCurMatrix();
 868 }
 869
 870 void glesTranslated( double a, double b, double c )
 871 {
 872    Matrix m, r;
 873
 874    m.Identity();
 875    m.Translate(a,b,c);
 876    r.Multiply(m, matrixStack[curStack][matrixIndex[curStack]]);
 877    matrixStack[curStack][matrixIndex[curStack]] = r;
 878    LoadCurMatrix();
 879 }
 880
 881 void glesMultMatrixd( double * i )
 882 {
 883    Matrix r;
 884    r.Multiply((Matrix *)i, matrixStack[curStack][matrixIndex[curStack]]);
 885    matrixStack[curStack][matrixIndex[curStack]] = r;
 886    LoadCurMatrix();
 887 }
 888
 889 void glesMatrixMode(int mode)
 890 {
 891    curStack = mode == GL_MODELVIEW ? 0 : mode == GL_PROJECTION ? 1 : 2;
 892    glMatrixMode(mode);
 893 }
 894
 895 #define glPushMatrix          glesPushMatrix
 896 #define glPopMatrix           glesPopMatrix
 897 #define glLoadIdentity        glesLoadIdentity
 898 #define glMatrixMode          glesMatrixMode
 899
 900 /* Using the built-in matrix stack
 901 void glesLoadMatrixd( double * i )
 902 {
 903    float m[16] =
 904    {
 905       (float)i[0],(float)i[1],(float)i[2],(float)i[3],
 906       (float)i[4],(float)i[5],(float)i[6],(float)i[7],
 907       (float)i[8],(float)i[9],(float)i[10],(float)i[11],
 908       (float)i[12],(float)i[13],(float)i[14],(float)i[15]
 909    };
 910    glLoadMatrixf(m);
 911 }
 912
 913 void glesOrtho( double l, double r, double b, double t, double n, double f )
 914 {
 915    float matrix[4][4] =
 916    {
 917       { (float)(2 / (r - l)), 0, 0, 0 },
 918       { 0, (float)(2 / (t - b)), 0, 0 },
 919       { 0, 0, (float)(-2 / (f - n)), 0 },
 920       { (float)(-(r + l) / (r - l)), (float)(-(t + b) / (t - b)), (float)(-(f + n) / (f - n)), 1 }
 921    };
 922    glMultMatrixf((float *)matrix);
 923 }
 924
 925 void glesFrustum( double l, double r, double b, double t, double n, double f )
 926 {
 927    float A = (float)((r + l) / (r - l));
 928    float B = (float)((t + b) / (t - b));
 929    float C = (float)(-(f + n) / (f - n));
 930    float D = (float)(-2*f*n/(f-n));
 931    float matrix[4][4] =
 932    {
 933       { (float)(2*n / (r - l)), 0, 0, 0 },
 934       { 0, (float)(2*n / (t - b)), 0, 0 },
 935       { A, B,             C,-1 },
 936       { 0, 0,             D, 0 }
 937    };
 938    glMultMatrixf((float *)matrix);
 939 }
 940
 941 void glesRotated( double a, double b, double c, double d ) { glRotatef((float)a, (float)b, (float)c, (float)d); }
 942 void glesScaled( double a, double b, double c ) { glScalef((float)a, (float)b, (float)c); }
 943 void glesTranslated( double a, double b, double c ) { glTranslatef((float)a, (float)b, (float)c); }
 944
 945 void glesMultMatrixd( double * i )
 946 {
 947    float m[16] =
 948    {
 949       (float)i[0], (float)i[1], (float)i[2], (float)i[3],
 950       (float)i[4], (float)i[5], (float)i[6], (float)i[7],
 951       (float)i[8], (float)i[9], (float)i[10], (float)i[11],
 952       (float)i[12], (float)i[13], (float)i[14], (float)i[15]
 953    };
 954    glMultMatrixf(m);
 955 }
 956 */
 957
 958 // Need to do these...
 959 void glesVertex3f( float x, float y, float z )
 960 {
 961    numVertexCoords = 3;
 962    if(vertexCount + 4 > beginBufferSize)
 963    {
 964       beginBufferSize = beginBufferSize + beginBufferSize/2;
 965       vertexPointer = renew vertexPointer float[beginBufferSize * 5];
 966    }
 967
 968    vertexPointer[vertexCount*5+2] = x;
 969    vertexPointer[vertexCount*5+3] = y;
 970    vertexPointer[vertexCount*5+4] = z;
 971    vertexCount++;
 972
 973    if(beginMode == GL_QUADS && ((beginCount % 4) == 3))
 974    {
 975       vertexPointer[vertexCount*5+2] = vertexPointer[(vertexCount-4)*5+2];
 976       vertexPointer[vertexCount*5+3] = vertexPointer[(vertexCount-4)*5+3];
 977       vertexPointer[vertexCount*5+4] = vertexPointer[(vertexCount-4)*5+4];
 978       vertexCount++;
 979       vertexPointer[vertexCount*5+2] = vertexPointer[(vertexCount-3)*5+2];
 980       vertexPointer[vertexCount*5+3] = vertexPointer[(vertexCount-3)*5+3];
 981       vertexPointer[vertexCount*5+4] = vertexPointer[(vertexCount-3)*5+4];
 982       vertexCount++;
 983    }
 984    beginCount++;
 985 }
 986
 987 void glesVertex3d( double x, double y, double z )  { glesVertex3f((float)x, (float)y, (float)z); }
 988 void glesVertex3fv( float* coords )                { glesVertex3f(coords[0], coords[1], coords[2]); }
 989
 990 void glesNormal3f(float x, float y, float z)
 991 {
 992    normalCount = vertexCount;
 993    if(vertexCount + 4 > normalBufferSize)
 994    {
 995       normalBufferSize = normalBufferSize + normalBufferSize/2;
 996       normalPointer = renew normalPointer float[normalBufferSize * 2];
 997    }
 998
 999    normalPointer[normalCount*3+0] = x;
1000    normalPointer[normalCount*3+1] = y;
1001    normalPointer[normalCount*3+2] = z;
1002    normalCount++;
1003
1004    if(beginMode == GL_QUADS && ((beginCount % 4) == 3))
1005    {
1006       normalPointer[normalCount*3+0] = normalPointer[(normalCount-4)*3+0];
1007       normalPointer[normalCount*3+1] = normalPointer[(normalCount-4)*3+1];
1008       normalPointer[normalCount*3+2] = normalPointer[(normalCount-4)*3+2];
1009       normalCount++;
1010       normalPointer[normalCount*3+0] = normalPointer[(normalCount-3)*3+0];
1011       normalPointer[normalCount*3+1] = normalPointer[(normalCount-3)*3+1];
1012       normalPointer[normalCount*3+2] = normalPointer[(normalCount-3)*3+2];
1013       normalCount++;
1014    }
1015 }
1016 void glesNormal3fd(double x, double y, double z)         { glesNormal3f((float)x, (float)y, (float)z); }
1017 void glesNormal3fv(float * coords)                       { glesNormal3f(coords[0], coords[1], coords[2]); }
1018
1019 void glesColorMaterial(int a, int b)
1020 {
1021    PrintLn("glColorMaterial stub");
1022 }
1023
1024 void glesTerminate()
1025 {
1026    delete vertexPointer;
1027    beginBufferSize = 0;
1028
1029    delete floatVPBuffer;
1030    shortVPSize = 0;
1031
1032    delete shortVPBuffer;
1033    floatVPSize = 0;
1034
1035    delete shortBDBuffer;
1036    shortBDSize = 0;
1037 }
1038
1039 static GLuint stippleTexture;
1040 static bool stippleEnabled;
1041
1042 void glesLineStipple( int i, unsigned short j )
1043 {
1044    uint texture[1*16];
1045    int c;
1046    int x;
1047    for(x = 0; x < 16; x++)
1048    {
1049       bool v = (j & (1 << x)) != 0;
1050       texture[x] = v ? 0xFFFFFFFF : 0;
1051    }
1052    if(!stippleTexture)
1053       glGenTextures(1, &stippleTexture);
1054    glBindTexture(GL_TEXTURE_2D, stippleTexture);
1055    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, texture);
1056    glEnable(GL_TEXTURE_2D);
1057    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
1058    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
1059    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
1060    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1061    glMatrixMode(GL_TEXTURE);
1062    glLoadIdentity();
1063    //glTranslated(1.0/backAttrib->texW/2.0f, 1.0/backAttrib->texH/2.0f, 0.0f);
1064    glScaled(i/16.0, 1, 1.0f);
1065    glTranslated(0.5, 0.5, 0);
1066    glMatrixMode(GL_PROJECTION);
1067 }
1068
1069 void glesLightModeli( unsigned int pname, int param )
1070 {
1071    if(pname == GL_LIGHT_MODEL_TWO_SIDE)
1072       glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, param);
1073 }
1074
1075 void glClearDepth( double depth ) { glClearDepthf((float)depth); }
1076 void glFogi( unsigned int pname, int param ) { }
1077 void glPolygonMode( unsigned int i, unsigned int j ) { }
1078
1079
1080 // *** Picking won't be supported for now ***
1081 void glPushName( unsigned int i ) { }
1082 void glLoadName( unsigned int i ) { }
1083 void glPopName() { }
1084
1085 // Probably replace by regular glBlendFunc ...
1086 void glBlendFuncSeparate(int a, int b, int c, int d)
1087 {
1088    glBlendFunc(a, b);
1089 }
1090
1091 // For direct pixel blitting...
1092 void glRasterPos2d(double a, double b) { }
1093 void glPixelZoom(float a, float b) { }
1094 void glDrawPixels(int a, int b, int c, int d, void * e) { }
1095
1096 #else
1097
1098 /* Non OpenGL ES friendly stuff
1099 #undef GL_UNSIGNED_INT
1100 #undef GL_DOUBLE
1101 #undef GL_INT
1102 //#undef GL_POLYGON
1103 //#undef GL_QUADS
1104 #undef GL_QUAD_STRIP
1105 #undef GL_POLYGON_STIPPLE
1106 #undef GL_LINE_STIPPLE
1107 #undef GL_LINE
1108 #undef GL_FILL
1109 #undef GL_ALL_ATTRIB_BITS
1110 #undef GL_LIGHT_MODEL_LOCAL_VIEWER
1111 */
1112
1113 #endif
1114
1115 #if !defined(__APPLE__)
1116 void (APIENTRY * glBindBufferARB) (GLenum target, GLuint buffer);
1117 void (APIENTRY * glGenBuffersARB) (GLsizei n, GLuint *buffers);
1118 void (APIENTRY * glDeleteBuffersARB) (GLsizei n, const GLuint *buffers);
1119 void (APIENTRY * glBufferDataARB) (GLenum target, int size, const GLvoid *data, GLenum usage);
1120 #endif
1121
1122 #endif
1123
1124 static int currentVertexBuffer;
1125
1126 bool GLSelectVBO(uint vbo)
1127 {
1128    if(currentVertexBuffer != vbo)
1129    {
1130       GLBindBuffer(GL_ARRAY_BUFFER, vbo);
1131       currentVertexBuffer = vbo;
1132       return true;
1133    }
1134    return false;
1135 }
1136
1137 void GLGenBuffers(int count, uint * buffer)
1138 {
1139 #ifdef __ANDROID__
1140    glGenBuffers(count, buffer);
1141 #else
1142    if(glGenBuffersARB)
1143       glGenBuffersARB(count, buffer);
1144 #endif
1145 }
1146
1147 void GLDeleteBuffers(int count, GLuint * buffer)
1148 {
1149 #ifdef __ANDROID__
1150    glDeleteBuffers(count, buffer);
1151 #else
1152    if(glDeleteBuffersARB)
1153       glDeleteBuffersARB(count, buffer);
1154 #endif
1155 }
1156
1157 void GLBindBuffer(int target, uint buffer)
1158 {
1159 #ifdef __ANDROID__
1160    glBindBuffer(target, buffer);
1161 #else
1162    if(glBindBufferARB)
1163       glBindBufferARB(target, buffer);
1164 #endif
1165 }
1166
1167 void GLBufferData(int type, GLenum target, int size, const GLvoid *data, GLenum usage)
1168 {
1169 #ifdef __ANDROID__
1170    if(type == GL_DOUBLE)
1171       glesBufferDatad(target, size, data, usage);
1172    else if(type == GL_UNSIGNED_INT)
1173       glesBufferDatai(target, size, data, usage);
1174    else
1175       glBufferData(target, size, data, usage);
1176 #else
1177    if(glBufferDataARB)
1178       glBufferDataARB(target, size, data, usage);
1179
1180 #endif
1181 }
1182
1183 static int displayWidth, displayHeight;
1184
1185 #define GL_CLAMP_TO_EDGE 0x812F
1186
1187 static bool vboAvailable;
1188
1189 static bool useSingleGLContext = false;
1190 class OGLDisplay : struct
1191 {
1192 #if defined(__WIN32__)
1193    HDC hdc;
1194    HGLRC glrc;
1195
1196    HBITMAP memBitmap;
1197    HDC memDC;
1198    byte * picture;
1199    uint stride;
1200    void * pBuffer;
1201    /*
1202    int imageBuffers[2];
1203    byte * pboMemory1, * pboMemory2;
1204    */
1205 #else
1206    GLXContext glContext;
1207
1208    Pixmap pixmap;
1209    XShmSegmentInfo shminfo;
1210    XImage * image;
1211    XShmSegmentInfo shminfoShape;
1212    XImage * shapeImage;
1213    byte * picture;
1214    uint stride;
1215    GLXPbuffer pBuffer;
1216    X11Picture windowPicture;
1217    X11Picture pixmapPicture;
1218    Pixmap shapePixmap;
1219    X11Picture shapePicture;
1220 #endif
1221
1222    ColorAlpha * flippingBuffer;
1223    int flipBufH, flipBufW;
1224    bool depthWrite;
1225    int x, y;
1226 };
1227
1228 class OGLSystem : struct
1229 {
1230    int maxTextureSize;
1231    bool loadingFont;
1232    bool pow2textures;
1233 #if defined(__WIN32__)
1234    PIXELFORMATDESCRIPTOR pfd;
1235    int format;
1236    HDC hdc;
1237    HGLRC glrc;
1238    HWND hwnd;
1239 #else
1240    XVisualInfo * visualInfo;
1241    GLXContext glContext;
1242    GLXDrawable glxDrawable;
1243 #endif
1244 };
1245
1246 class OGLSurface : struct
1247 {
1248    Font font;
1249    bool opaqueText;
1250    int xOffset;
1251    bool writingText;
1252
1253    float foreground[4], background[4], bitmapMult[4];
1254 } OGLSurface;
1255
1256 class OGLMesh : struct
1257 {
1258    uint vertices;
1259    uint normals;
1260    uint texCoords;
1261    uint texCoords2;
1262    uint colors;
1263 };
1264
1265 class OGLIndices : struct
1266 {
1267    uint16 * indices;
1268    uint buffer;
1269    uint nIndices;
1270 };
1271
1272 #if !defined(ECERE_NO3D) && !defined(ECERE_VANILLA)
1273 static int primitiveTypes[RenderPrimitiveType] =
1274 {
1275    GL_POINTS, GL_LINES, GL_TRIANGLES, GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_QUADS, GL_QUAD_STRIP, GL_LINE_STRIP
1276 };
1277 #endif
1278
1279 int current;
1280 void * previous;
1281
1282 class OpenGLDisplayDriver : DisplayDriver
1283 {
1284    class_property(name) = "OpenGL";
1285
1286    bool LockSystem(DisplaySystem displaySystem)
1287    {
1288       OGLSystem oglSystem = displaySystem.driverData;
1289       if(useSingleGLContext) return true;
1290    #if defined(__WIN32__)
1291       wglMakeCurrent(oglSystem.hdc, oglSystem.glrc);
1292    #elif defined(__unix__) || defined(__APPLE__)
1293       //if(previous) return true;
1294       // printf("Making SYSTEM current\n");
1295 #if !defined(__ANDROID__)
1296       glXMakeCurrent(xGlobalDisplay, (GLXDrawable)oglSystem.glxDrawable, oglSystem.glContext);
1297 #endif
1298       //previous = oglSystem.glContext;
1299    #endif
1300       return true;
1301    }
1302
1303    void UnlockSystem(DisplaySystem displaySystem)
1304    {
1305       if(useSingleGLContext) return;
1306    #if defined(__WIN32__)
1307       wglMakeCurrent(null, null);
1308    #elif defined(__unix__) || defined(__APPLE__)
1309       // printf("Making NULL current\n");
1310       #if defined(__ANDROID__)
1311       #else
1312       glXMakeCurrent(xGlobalDisplay, None, null);
1313       #endif
1314       // previous = null;
1315    #endif
1316    }
1317
1318    bool Lock(Display display)
1319    {
1320       OGLDisplay oglDisplay = display.driverData;
1321
1322       if(useSingleGLContext) return true;
1323    #if defined(__WIN32__)
1324       wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
1325    #elif defined(__unix__) || defined(__APPLE__)
1326       // if(previous) glXMakeCurrent(xGlobalDisplay, None, null);
1327       // printf("   Making DISPLAY current\n");
1328       #if defined(__ANDROID__)
1329       #else
1330       glXMakeCurrent(xGlobalDisplay, (GLXDrawable)display.window, oglDisplay.glContext);
1331       #endif
1332    #endif
1333       return true;
1334    }
1335
1336    void Unlock(Display display)
1337    {
1338       if(useSingleGLContext) return;
1339       //printf("   Making NULL current\n");
1340       //glXMakeCurrent(xGlobalDisplay, None, null);
1341       // if(previous)
1342          LockSystem(display.displaySystem);
1343    }
1344
1345    void DestroyDisplay(Display display)
1346    {
1347       OGLDisplay oglDisplay = display.driverData;
1348
1349       if(oglDisplay)
1350       {
1351    #if defined(__WIN32__)
1352          wglMakeCurrent( null, null );
1353
1354          if(oglDisplay.glrc)
1355             wglDeleteContext(oglDisplay.glrc);
1356
1357          if(oglDisplay.hdc && oglDisplay.pBuffer)
1358             wglReleasePbufferDCARB(oglDisplay.pBuffer, oglDisplay.hdc);
1359
1360          if(oglDisplay.pBuffer)
1361             wglDestroyPbufferARB(oglDisplay.pBuffer);
1362
1363          if(oglDisplay.hdc)
1364             ReleaseDC(display.window, oglDisplay.hdc);
1365
1366          if(oglDisplay.memDC) DeleteDC(oglDisplay.memDC);
1367          if(oglDisplay.memBitmap) DeleteObject(oglDisplay.memBitmap);
1368
1369    #elif defined(__unix__) || defined(__APPLE__)
1370       #if defined(__ANDROID__)
1371       #else
1372          if(oglDisplay.shapePixmap)
1373             XFreePixmap(xGlobalDisplay, oglDisplay.shapePixmap);
1374          if(oglDisplay.pixmap)
1375             XFreePixmap(xGlobalDisplay, oglDisplay.pixmap);
1376          if(oglDisplay.image)
1377          {
1378             if(oglDisplay.shminfoShape.shmid != -1)
1379             {
1380                XShmDetach(xGlobalDisplay, &oglDisplay.shminfo);
1381                if(oglDisplay.shminfo.shmaddr != (void *)-1)
1382                   shmdt(oglDisplay.shminfo.shmaddr);
1383                shmctl(oglDisplay.shminfo.shmid, IPC_RMID, 0);
1384             }
1385          }
1386          if(oglDisplay.shapeImage)
1387          {
1388             if(oglDisplay.shminfoShape.shmid != -1)
1389             {
1390                XShmDetach(xGlobalDisplay, &oglDisplay.shminfoShape);
1391                if(oglDisplay.shminfoShape.shmaddr != (void *)-1)
1392                   shmdt(oglDisplay.shminfoShape.shmaddr);
1393                shmctl(oglDisplay.shminfoShape.shmid, IPC_RMID, 0);
1394             }
1395             XDestroyImage(oglDisplay.shapeImage);
1396             oglDisplay.shapeImage = None;
1397          }
1398
1399          glXMakeCurrent(xGlobalDisplay, None, null);
1400
1401          if(oglDisplay.glContext)
1402             glXDestroyContext(xGlobalDisplay, oglDisplay.glContext);
1403       #endif
1404    #endif
1405          delete oglDisplay.flippingBuffer;
1406          delete oglDisplay;
1407          display.driverData = null;
1408       }
1409    }
1410
1411    void ::CheckExtensions(OGLSystem oglSystem)
1412    {
1413       const char * extensions = (const char *)glGetString(GL_EXTENSIONS);
1414       if(extensions)
1415          oglSystem.pow2textures = strstr(extensions, "GL_ARB_texture_non_power_of_two") ? false : true;
1416       glGetIntegerv(GL_MAX_TEXTURE_SIZE, &oglSystem.maxTextureSize);
1417    }
1418
1419    bool CreateDisplaySystem(DisplaySystem displaySystem)
1420    {
1421       bool result = false;
1422       OGLSystem oglSystem = displaySystem.driverData = OGLSystem { };
1423
1424    #ifdef __WIN32__
1425       oglSystem.hwnd = CreateWindow("static", null, 0,0,0,0,0,null,null,null,null);
1426
1427       oglSystem.hdc = GetDC(oglSystem.hwnd);
1428       if(oglSystem.hdc)
1429       {
1430
1431          oglSystem.pfd.nSize = (short)sizeof(oglSystem.pfd);
1432          oglSystem.pfd.nVersion = 1;
1433          oglSystem.pfd.dwFlags = PFD_DRAW_TO_WINDOW /*PFD_DRAW_TO_BITMAP*/ | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
1434          oglSystem.pfd.iPixelType = PFD_TYPE_RGBA;
1435          oglSystem.pfd.cColorBits = 24;
1436          oglSystem.pfd.cAlphaBits = 8;
1437          oglSystem.pfd.cDepthBits = 24;
1438          oglSystem.pfd.iLayerType = PFD_MAIN_PLANE;
1439
1440          oglSystem.format = ChoosePixelFormat(oglSystem.hdc, &oglSystem.pfd);
1441          DescribePixelFormat(oglSystem.hdc, oglSystem.format, sizeof(oglSystem.pfd), &oglSystem.pfd);
1442
1443          if(oglSystem.pfd.cColorBits > 8)
1444          {
1445             SetPixelFormat(oglSystem.hdc, oglSystem.format, &oglSystem.pfd);
1446             oglSystem.glrc = wglCreateContext(oglSystem.hdc);
1447             if(oglSystem.glrc)
1448             {
1449                wglMakeCurrent(oglSystem.hdc, oglSystem.glrc);
1450
1451                  // Get Pointers To The GL Functions
1452                glActiveTextureARB = (void *) wglGetProcAddress("glActiveTextureARB");
1453                glMultiTexCoord2fARB = (void *) wglGetProcAddress("glMultiTexCoord2fARB");
1454                glClientActiveTextureARB = (void *) wglGetProcAddress("glClientActiveTextureARB");
1455                glLockArraysEXT = (void *) wglGetProcAddress("glLockArraysEXT" );
1456                glUnlockArraysEXT = (void *) wglGetProcAddress("glUnlockArraysEXT");
1457                  glGenBuffersARB = (void *) wglGetProcAddress("glGenBuffersARB");
1458                  glBindBufferARB = (void *) wglGetProcAddress("glBindBufferARB");
1459                  glBufferDataARB = (void *) wglGetProcAddress("glBufferDataARB");
1460                glMapBufferARB  = (void *) wglGetProcAddress("glMapBufferARB");
1461                glUnmapBufferARB  = (void *) wglGetProcAddress("glUnmapBufferARB");
1462                  glDeleteBuffersARB = (void *) wglGetProcAddress("glDeleteBuffersARB");
1463                glBlendFuncSeparate = (void *) wglGetProcAddress("glBlendFuncSeparate");
1464
1465                wglChoosePixelFormatARB = (void *) wglGetProcAddress("wglChoosePixelFormatARB");
1466                wglGetExtensionsStringARB = (void *)wglGetProcAddress("wglGetExtensionsStringARB");
1467                wglCreatePbufferARB = (void *)wglGetProcAddress("wglCreatePbufferARB");
1468                wglGetPbufferDCARB = (void *)wglGetProcAddress("wglGetPbufferDCARB");
1469                wglQueryPbufferARB = (void *)wglGetProcAddress("wglQueryPbufferARB");
1470                wglDestroyPbufferARB = (void *)wglGetProcAddress("wglDestroyPbufferARB");
1471                wglReleasePbufferDCARB = (void *)wglGetProcAddress("wglReleasePbufferDCARB");
1472                wglBindTexImageARB = (void *)wglGetProcAddress("wglBindTexImageARB");
1473                wglReleaseTexImageARB = (void *)wglGetProcAddress("wglReleaseTexImageARB");
1474
1475                wglSwapIntervalEXT = (void *)wglGetProcAddress("wglSwapIntervalEXT");
1476
1477                vboAvailable = glBindBufferARB != null;
1478
1479                // eSystem_LoggingMode(LOG_MSGBOX, null);
1480
1481                if(wglChoosePixelFormatARB)
1482                {
1483                     int pixelFormat;
1484                     int valid;
1485                     int numFormats;
1486                     float fAttributes[] = {0,0};
1487                     int iAttributes[] =
1488                   {
1489                      WGL_DRAW_TO_WINDOW_ARB,GL_TRUE,
1490                             WGL_SUPPORT_OPENGL_ARB,GL_TRUE,
1491                             WGL_ACCELERATION_ARB,WGL_FULL_ACCELERATION_ARB,
1492                             WGL_COLOR_BITS_ARB,24,
1493                             WGL_ALPHA_BITS_ARB,8,
1494                             WGL_DEPTH_BITS_ARB,16,
1495                             WGL_STENCIL_BITS_ARB,0,
1496                             WGL_DOUBLE_BUFFER_ARB,GL_TRUE,
1497                             WGL_SAMPLE_BUFFERS_ARB,GL_TRUE,
1498                             WGL_SAMPLES_ARB, 4,                                         // Check For 4x Multisampling
1499                             0,0
1500                   };
1501
1502                   //Log("Found wglChoosePixelFormatARB\n");
1503
1504                     valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1505                     if(!valid || !numFormats)
1506                     {
1507                      //Log("Can't find 4x multi sampling\n");
1508                        iAttributes[19] = 2;
1509                        valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1510                      if(!valid || !numFormats)
1511                      {
1512                         // Log("Can't find 2x multi sampling\n");
1513                         iAttributes[16] = 0;
1514                         iAttributes[17] = 0;
1515                         valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1516                      }
1517                     }
1518                   if(valid && numFormats)
1519                   {
1520                      oglSystem.format = pixelFormat;
1521                      wglMakeCurrent(null, null);
1522                      wglDeleteContext(oglSystem.glrc);
1523
1524                      // *** DescribePixelFormat does not support WGL pixel formats! ***
1525                      //DescribePixelFormat(oglSystem.hdc, oglSystem.format, sizeof(oglSystem.pfd), &oglSystem.pfd);
1526                      SetPixelFormat(oglSystem.hdc, oglSystem.format, &oglSystem.pfd);
1527                      //Log("Successfully set pixel format\n");
1528
1529                      oglSystem.glrc = wglCreateContext(oglSystem.hdc);
1530                      wglMakeCurrent(oglSystem.hdc, oglSystem.glrc);
1531                   }
1532                }
1533                /*else
1534                   eSystem_Logf("Can't find wglChoosePixelFormatARB\n");*/
1535
1536                result = true;
1537
1538                CheckExtensions(oglSystem);
1539
1540                wglMakeCurrent(null, null);
1541
1542                //eSystem_DumpErrors(true);
1543             }
1544          }
1545       }
1546    #elif defined(__unix__) || defined(__APPLE__)
1547       vboAvailable = true;
1548       #if defined(__ANDROID__)
1549          egl_init_display(guiApp.desktop.windowHandle);
1550          CheckExtensions(oglSystem);
1551          result = true;
1552       #else
1553       {
1554          X11Window root = RootWindow( xGlobalDisplay, DefaultScreen( xGlobalDisplay ) );
1555          XSetWindowAttributes attr;
1556          unsigned long mask;
1557
1558          int attrList[] =
1559          {
1560       #ifndef ECERE_MINIGLX
1561             GLX_USE_GL, GLX_DEPTH_SIZE, 1,
1562       #endif
1563             GLX_RGBA,
1564             GLX_RED_SIZE, 1, GLX_GREEN_SIZE, 1, GLX_BLUE_SIZE, 1,
1565             GLX_DOUBLEBUFFER,
1566             None
1567          };
1568          oglSystem.visualInfo = glXChooseVisual( xGlobalDisplay,  DefaultScreen( xGlobalDisplay ), attrList );
1569          attr.background_pixel = 0;
1570          attr.border_pixel = 0;
1571          attr.colormap = XCreateColormap( xGlobalDisplay, root, oglSystem.visualInfo->visual, AllocNone);
1572          attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
1573          mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
1574
1575          oglSystem.glxDrawable = XCreateWindow( xGlobalDisplay, root, 0, 0, 1, 1, 0, oglSystem.visualInfo->depth, InputOutput,
1576             oglSystem.visualInfo->visual, mask, &attr );
1577       }
1578       if(oglSystem.visualInfo)
1579       {
1580          oglSystem.glContext = glXCreateContext(xGlobalDisplay, oglSystem.visualInfo, null, True);
1581          if(oglSystem.glContext)
1582          {
1583             glXMakeCurrent(xGlobalDisplay, oglSystem.glxDrawable, oglSystem.glContext);
1584             // Setup Extensions
1585             CheckExtensions(oglSystem);
1586             glXMakeCurrent(xGlobalDisplay, None, null);
1587             result = true;
1588          }
1589       }
1590       #endif
1591    #endif
1592
1593       displaySystem.flags.alpha = true;
1594       displaySystem.flags.flipping = true;
1595       displaySystem.pixelFormat = pixelFormat888;
1596       return result;
1597    }
1598
1599    void DestroyDisplaySystem(DisplaySystem displaySystem)
1600    {
1601       OGLSystem oglSystem = displaySystem.driverData;
1602
1603    #if defined(__WIN32__)
1604       wglMakeCurrent( null, null );
1605
1606       if(oglSystem.glrc)
1607          wglDeleteContext(oglSystem.glrc);
1608
1609       if(oglSystem.hdc)
1610          ReleaseDC(oglSystem.hwnd, oglSystem.hdc);
1611       DestroyWindow(oglSystem.hwnd);
1612
1613    #elif defined(__unix__) || defined(__APPLE__)
1614       #if defined(__ANDROID__)
1615          egl_term_display();
1616       #else
1617       if(oglSystem.visualInfo)
1618       {
1619    #ifdef   ECERE_MINIGLX
1620          __miniglx_XFree(oglSystem.visualInfo);
1621    #else
1622          XFree(oglSystem.visualInfo);
1623    #endif
1624       }
1625
1626       if(oglSystem.glxDrawable)
1627       {
1628          XDestroyWindow(xGlobalDisplay, oglSystem.glxDrawable);
1629          oglSystem.glxDrawable = 0;
1630       }
1631       #endif
1632    #endif
1633       delete oglSystem;
1634    }
1635
1636    bool CreateDisplay(Display display)
1637    {
1638       bool result = false;
1639       OGLDisplay oglDisplay = display.driverData;
1640       OGLSystem oglSystem = display.displaySystem.driverData;
1641       if(!oglDisplay)
1642          oglDisplay = display.driverData = OGLDisplay { };
1643       //printf("Inside CreateDisplay\n");
1644
1645 #if defined(__WIN32__) || defined(USEPBUFFER)
1646       if(!display.alphaBlend)
1647 #endif
1648       {
1649    #if defined(__WIN32__)
1650          oglDisplay.hdc = GetDC(display.window);
1651          SetPixelFormat(oglDisplay.hdc, oglSystem.format, &oglSystem.pfd);
1652          if((oglDisplay.glrc = wglCreateContext(oglDisplay.hdc)))
1653          {
1654             wglShareLists(oglSystem.glrc, oglDisplay.glrc);
1655             wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
1656             result = true;
1657          }
1658          else
1659             ReleaseDC(display.window, oglDisplay.hdc);
1660    #elif defined(__unix__) || defined(__APPLE__)
1661       #if defined(__ANDROID__)
1662       #else
1663          XVisualInfo * visualInfo = ((XWindowData)display.windowDriverData).visual;
1664          /*
1665 #if defined(__APPLE__)
1666          XVisualInfo template = { 0 };
1667          XWindowAttributes winAttr;
1668          int n;
1669          XGetWindowAttributes(xGlobalDisplay, (X11Window)display.window, &winAttr);
1670          template.visualid = XVisualIDFromVisual(winAttr.visual);
1671          visualInfo = XGetVisualInfo(xGlobalDisplay, VisualIDMask, &template, &n);
1672 #ifdef _DEBUG
1673          printf("XGetVisualInfo visual ID = %d\n", template.visualid);
1674          printf("visualInfo visual ID = %d\n", visualInfo->visualid);
1675          printf("oglSystem.visualInfo visual ID = %d\n", oglSystem.visualInfo->visualid);
1676          printf("((XWindowData)display.windowDriverData).visual visual ID = %d\n", ((XWindowData)display.windowDriverData).visual->visualid);
1677 #endif
1678          // visualInfo = oglSystem.visualInfo;
1679 //#endif
1680          */
1681          if(visualInfo)
1682          {
1683             //printf("visualInfo is not null\n");
1684             // printf("Creating Display Context, sharing with %x!\n", oglSystem.glContext);
1685             oglDisplay.glContext = glXCreateContext(xGlobalDisplay, visualInfo, oglSystem.glContext, True);
1686             //XFree(visualInfo);
1687          }
1688
1689          // oglDisplay.glContext = glXCreateContext(xGlobalDisplay, oglSystem.visualInfo, oglSystem.glContext, True);
1690          if(oglDisplay.glContext)
1691          {
1692             //printf("CreateDisplay Got a Context\n");
1693             glXMakeCurrent(xGlobalDisplay, (GLXDrawable)display.window, oglDisplay.glContext);
1694             result = true;
1695          }
1696       #endif
1697    #endif
1698       }
1699 #if defined(__WIN32__) || defined(USEPBUFFER)
1700       else
1701          result = true;
1702 #endif
1703       if(result)
1704       {
1705 #if !defined(__OLDX__)
1706          if(glBlendFuncSeparate)
1707             glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
1708          else
1709 #endif
1710             glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1711          glEnable(GL_BLEND);
1712
1713          glMatrixMode(GL_MODELVIEW);
1714          glScaled(1.0, 1.0, -1.0);
1715          // glTranslatef(0.375f, 0.375f, 0.0f);
1716          // glTranslatef(-0.625f, -0.625f, 0.0f);
1717          glMatrixMode(GL_PROJECTION);
1718          glShadeModel(GL_FLAT);
1719
1720          // glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, true);
1721          glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
1722          glFogi(GL_FOG_MODE, GL_EXP);
1723          glFogf(GL_FOG_DENSITY, 0);
1724          glEnable(GL_NORMALIZE);
1725          glDepthFunc(GL_LESS);
1726          glClearDepth(1.0);
1727          glDisable(GL_MULTISAMPLE_ARB);
1728       }
1729 #if !defined(ECERE_NO3D) && !defined(ECERE_VANILLA)
1730       display.ambient = Color { 50,50,50 };
1731 #endif
1732
1733       if(!useSingleGLContext)
1734       {
1735    #if defined(__WIN32__)
1736          wglMakeCurrent(null, null);
1737    #elif defined(__unix__) || defined(__APPLE__)
1738       #if defined(__ANDROID__)
1739          result = true;
1740       #else
1741          glXMakeCurrent(xGlobalDisplay, None, null);
1742       #endif
1743    #endif
1744       }
1745
1746       return result;
1747    }
1748
1749    bool DisplaySize(Display display, int width, int height)
1750    {
1751       OGLDisplay oglDisplay = display.driverData;
1752       OGLSystem oglSystem = display.displaySystem.driverData;
1753
1754       bool result = false;
1755
1756       //printf("Inside DisplaySize\n");
1757 #if defined(__WIN32__) || defined(USEPBUFFER)
1758       if(display.alphaBlend)
1759       {
1760 #if defined(__WIN32__)
1761          const int attributes[]=
1762          {
1763             /*WGL_TEXTURE_FORMAT_ARB, WGL_TEXTURE_RGBA_ARB,
1764             WGL_TEXTURE_TARGET_ARB, WGL_TEXTURE_2D_ARB, */0
1765          };
1766          int pixelFormat = 0;
1767          if(wglChoosePixelFormatARB)
1768          {
1769             int valid;
1770             int numFormats;
1771             float fAttributes[] = {0,0};
1772             int iAttributes[] =
1773             {
1774                //WGL_DRAW_TO_BITMAP_ARB, GL_TRUE,
1775                WGL_DRAW_TO_PBUFFER_ARB,GL_TRUE,
1776                     WGL_SUPPORT_OPENGL_ARB,GL_TRUE,
1777                     WGL_ACCELERATION_ARB,WGL_FULL_ACCELERATION_ARB,
1778                     WGL_COLOR_BITS_ARB,24,
1779                     WGL_ALPHA_BITS_ARB,8,
1780                     WGL_DEPTH_BITS_ARB,16,
1781                     WGL_STENCIL_BITS_ARB,0,
1782                     WGL_DOUBLE_BUFFER_ARB,GL_FALSE,
1783                     WGL_SAMPLE_BUFFERS_ARB,GL_TRUE,
1784                     WGL_SAMPLES_ARB, 4,                                         // Check For 4x Multisampling
1785                     0,0
1786             };
1787
1788             //Log("Found wglChoosePixelFormatARB\n");
1789
1790             valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1791             if(!valid || !numFormats)
1792             {
1793                //Log("Can't find 4x multi sampling\n");
1794                iAttributes[19] = 2;
1795                valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1796                if(!valid || !numFormats)
1797                {
1798                   // Log("Can't find 2x multi sampling\n");
1799                   iAttributes[16] = 0;
1800                   iAttributes[17] = 0;
1801                   valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1802                   if(!valid || !numFormats)
1803                   {
1804                      int iAttributes[] =
1805                      {
1806                         WGL_DRAW_TO_PBUFFER_ARB,GL_TRUE,
1807                         //WGL_DRAW_TO_BITMAP_ARB,GL_TRUE,
1808                         WGL_SUPPORT_OPENGL_ARB,GL_TRUE,
1809                         WGL_COLOR_BITS_ARB,24,
1810                         WGL_ALPHA_BITS_ARB,8,
1811                         WGL_DEPTH_BITS_ARB,16,
1812                         0,0
1813                      };
1814                      valid = wglChoosePixelFormatARB(oglSystem.hdc,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
1815                   }
1816                }
1817             }
1818             if(valid && numFormats)
1819             {
1820                wglMakeCurrent(null, null);
1821             }
1822          }
1823
1824          wglMakeCurrent( null, null );
1825          wglMakeCurrent( oglDisplay.hdc, oglDisplay.glrc );
1826          if(oglDisplay.hdc && oglDisplay.pBuffer)
1827             wglReleasePbufferDCARB(oglDisplay.pBuffer, oglDisplay.hdc);
1828
1829          wglDestroyPbufferARB(oglDisplay.pBuffer);
1830
1831          if(!useSingleGLContext)
1832             wglMakeCurrent( null, null );
1833
1834          if(oglDisplay.glrc)
1835             wglDeleteContext(oglDisplay.glrc);
1836
1837          oglDisplay.pBuffer = wglCreatePbufferARB(oglSystem.hdc, pixelFormat, width, height, attributes);
1838          oglDisplay.hdc = wglGetPbufferDCARB(oglDisplay.pBuffer);
1839          if((oglDisplay.glrc = wglCreateContext(oglDisplay.hdc)))
1840          {
1841             BITMAPINFO * info;
1842             HDC hdc = GetDC(display.window);
1843
1844             wglShareLists(oglSystem.glrc, oglDisplay.glrc);
1845             wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
1846
1847             //wglQueryPbufferARB(pBuffer, WGL_PBUFFER_WIDTH_ARB, &width);
1848             //wglQueryPbufferARB(pBuffer, WGL_PBUFFER_HEIGHT_ARB, &height);
1849
1850             // glDeleteBuffersARB(2, oglDisplay.imageBuffers);
1851
1852             if((info = (BITMAPINFO *)new0 byte[sizeof(BITMAPINFOHEADER)+sizeof(RGBQUAD)*256]))
1853             {
1854                HBITMAP newBitmap;
1855
1856                if(oglDisplay.memDC) DeleteDC(oglDisplay.memDC);
1857                oglDisplay.memDC = CreateCompatibleDC(hdc);
1858                SetMapMode(oglDisplay.memDC, MM_TEXT);
1859                info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
1860                info->bmiHeader.biPlanes = 1;
1861                info->bmiHeader.biCompression = BI_RGB;
1862                info->bmiHeader.biBitCount = 32; //(uint16)GetDeviceCaps(hdc, BITSPIXEL);
1863                info->bmiHeader.biWidth = width;
1864                info->bmiHeader.biHeight = height;
1865                newBitmap = CreateDIBSection(hdc, info, DIB_RGB_COLORS, &oglDisplay.picture, null, 0);
1866                if(newBitmap)
1867                {
1868                   SelectObject(oglDisplay.memDC, newBitmap);
1869                   if(oglDisplay.memBitmap) DeleteObject(oglDisplay.memBitmap);
1870                   /*
1871                   {
1872                      PIXELFORMATDESCRIPTOR pfd = { 0 };
1873                      pfd.nSize = (short)sizeof(pfd);
1874                      pfd.nVersion = 1;
1875                      pfd.dwFlags = PFD_DRAW_TO_BITMAP | PFD_SUPPORT_OPENGL;
1876                      pfd.iPixelType = PFD_TYPE_RGBA;
1877                      pfd.cColorBits = 32;
1878                      //pfd.cAlphaBits = 8;
1879                      pfd.cDepthBits = 24;
1880                      pfd.iLayerType = PFD_MAIN_PLANE;
1881
1882                      oglDisplay.hdc = oglDisplay.memDC;
1883
1884                      pixelFormat = ChoosePixelFormat(oglSystem.hdc, &pfd);
1885                      DescribePixelFormat(oglDisplay.hdc, pixelFormat, sizeof(pfd), &pfd);
1886                      SetPixelFormat(oglDisplay.hdc, pixelFormat, &pfd);
1887
1888                      oglDisplay.glrc = wglCreateContext(oglDisplay.hdc);
1889                      wglShareLists(oglSystem.glrc, oglDisplay.glrc);
1890                      wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
1891                   }
1892                   */
1893                   /*
1894                   {
1895                      const int imageSize = width * height * 4;
1896
1897                      glGenBuffersARB(2, oglDisplay.imageBuffers);
1898
1899                      glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[0]);
1900                      glBufferDataARB(GL_PIXEL_PACK_BUFFER_ARB, imageSize, null, GL_STREAM_READ);
1901                      // glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[1]);
1902                      // glBufferDataARB(GL_PIXEL_PACK_BUFFER_ARB, imageSize / 2, null, GL_STREAM_READ);
1903                   }
1904                   */
1905                   oglDisplay.memBitmap = newBitmap;
1906                   oglDisplay.stride = width;
1907
1908                   result = true;
1909                }
1910                delete info;
1911             }
1912             ReleaseDC(display.window, hdc);
1913          }
1914 #elif defined(__unix__) || defined(__APPLE__)
1915       #if defined(__ANDROID__)
1916          result = true;
1917       #else
1918         int attrib[] =
1919         {
1920                 GLX_DOUBLEBUFFER,  True,
1921             GLX_DEPTH_SIZE,    1,
1922                 GLX_RED_SIZE,      8,
1923                 GLX_GREEN_SIZE,    8,
1924                 GLX_BLUE_SIZE,     8,
1925                 GLX_ALPHA_SIZE,    8,
1926                 GLX_STENCIL_SIZE,  1,
1927                 //GLX_DEPTH_SIZE,    24,
1928                 GLX_RENDER_TYPE,   GLX_RGBA_BIT,
1929                 GLX_DRAWABLE_TYPE, GLX_PBUFFER_BIT | GLX_WINDOW_BIT,
1930                 None
1931         };
1932
1933         int PBattrib[] =
1934         {
1935                 GLX_PBUFFER_WIDTH,   width,
1936                 GLX_PBUFFER_HEIGHT,  height,
1937                 GLX_LARGEST_PBUFFER, False,
1938             None
1939         };
1940
1941         // choose a pixel format that meets our minimum requirements
1942         int count = 0;
1943
1944         GLXFBConfig *config = glXChooseFBConfig(xGlobalDisplay, DefaultScreen(xGlobalDisplay), attrib, &count);
1945          if(config)
1946          {
1947             if(oglDisplay.pixmap)
1948             {
1949                XFreePixmap(xGlobalDisplay, oglDisplay.pixmap);
1950                oglDisplay.pixmap = None;
1951             }
1952             if(oglDisplay.shapePixmap)
1953             {
1954                XFreePixmap(xGlobalDisplay, oglDisplay.shapePixmap);
1955                oglDisplay.shapePixmap = None;
1956             }
1957
1958             // Free Shared Memory Pixmap
1959             if(oglDisplay.image)
1960             {
1961                if(oglDisplay.shminfoShape.shmid != -1)
1962                {
1963                   XShmDetach(xGlobalDisplay, &oglDisplay.shminfo);
1964                   if(oglDisplay.shminfo.shmaddr != (void *)-1)
1965                      shmdt(oglDisplay.shminfo.shmaddr);
1966                   shmctl(oglDisplay.shminfo.shmid, IPC_RMID, 0);
1967                }
1968                XDestroyImage(oglDisplay.image);
1969                oglDisplay.image = None;
1970             }
1971             if(oglDisplay.shapeImage)
1972             {
1973                if(oglDisplay.shminfoShape.shmid != -1)
1974                {
1975                   XShmDetach(xGlobalDisplay, &oglDisplay.shminfoShape);
1976                   if(oglDisplay.shminfoShape.shmaddr != (void *)-1)
1977                      shmdt(oglDisplay.shminfoShape.shmaddr);
1978                   shmctl(oglDisplay.shminfoShape.shmid, IPC_RMID, 0);
1979                }
1980                XDestroyImage(oglDisplay.shapeImage);
1981                oglDisplay.shapeImage = None;
1982             }
1983
1984             if(oglDisplay.windowPicture)
1985                XRenderFreePicture(xGlobalDisplay, oglDisplay.windowPicture);
1986             if(oglDisplay.pixmapPicture)
1987                XRenderFreePicture(xGlobalDisplay, oglDisplay.pixmapPicture);
1988
1989             if(oglDisplay.pixmap)
1990                XFreePixmap(xGlobalDisplay, oglDisplay.pixmap);
1991
1992             if(oglDisplay.glContext)
1993                   glXDestroyContext(xGlobalDisplay, oglDisplay.glContext);
1994             if(oglDisplay.pBuffer)
1995                glXDestroyPbuffer(xGlobalDisplay, oglDisplay.pBuffer);
1996
1997                 oglDisplay.pBuffer = glXCreatePbuffer(xGlobalDisplay, config[0], PBattrib);
1998             if(oglDisplay.pBuffer)
1999             {
2000                    oglDisplay.glContext = glXCreateNewContext(xGlobalDisplay, config[0], GLX_RGBA_TYPE, oglSystem.glContext, True);
2001                if(oglDisplay.glContext)
2002                {
2003                   glXMakeCurrent(xGlobalDisplay, None, null);
2004                   glXMakeCurrent(xGlobalDisplay, (GLXDrawable)display.window, oglDisplay.glContext);
2005
2006                   // Initialize Shared Memory Pixmap
2007                   oglDisplay.image = XShmCreateImage(xGlobalDisplay, DefaultVisual(xGlobalDisplay, DefaultScreen(xGlobalDisplay)), 32,
2008                      ZPixmap, null, &oglDisplay.shminfo, width, height);
2009                   if(oglDisplay.image)
2010                   {
2011                      oglDisplay.shminfo.shmid = shmget(IPC_PRIVATE,
2012                         oglDisplay.image->bytes_per_line * oglDisplay.image->height, IPC_CREAT|0777);
2013                      if(oglDisplay.shminfo.shmid != -1)
2014                      {
2015                         oglDisplay.shminfo.shmaddr = shmat(oglDisplay.shminfo.shmid, 0, 0);
2016                         if(oglDisplay.shminfo.shmaddr != (void *)-1)
2017                         {
2018                            oglDisplay.shminfo.readOnly = False;
2019                            if(XShmAttach(xGlobalDisplay, &oglDisplay.shminfo))
2020                            {
2021                               oglDisplay.pixmap = XShmCreatePixmap(xGlobalDisplay, (X11Window)display.window, oglDisplay.shminfo.shmaddr,
2022                                  &oglDisplay.shminfo, width, height, 32);
2023
2024                               // Initialize Shared Memory Shape Pixmap
2025                               oglDisplay.shapeImage = XShmCreateImage(xGlobalDisplay, DefaultVisual(xGlobalDisplay, DefaultScreen(xGlobalDisplay)), 1,
2026                                  ZPixmap, null, &oglDisplay.shminfoShape, width, height);
2027                               if(oglDisplay.shapeImage)
2028                               {
2029                                  oglDisplay.shminfoShape.shmid = shmget(IPC_PRIVATE,
2030                                     oglDisplay.shapeImage->bytes_per_line * oglDisplay.shapeImage->height, IPC_CREAT|0777);
2031                                  if(oglDisplay.shminfoShape.shmid != -1)
2032                                  {
2033                                     oglDisplay.shminfoShape.shmaddr = shmat(oglDisplay.shminfoShape.shmid, 0, 0);
2034                                     if(oglDisplay.shminfoShape.shmaddr != (void *)-1)
2035                                     {
2036                                        oglDisplay.shminfoShape.readOnly = False;
2037                                        if(XShmAttach(xGlobalDisplay, &oglDisplay.shminfoShape))
2038                                        {
2039                                           oglDisplay.shapePixmap = XShmCreatePixmap(xGlobalDisplay, (X11Window)display.window, oglDisplay.shminfoShape.shmaddr,
2040                                              &oglDisplay.shminfoShape, width, height, 1);
2041                                           //oglDisplay.shapePixmap = XCreatePixmap(xGlobalDisplay, (X11Window)display.window, width, height, 1);
2042
2043                                           {
2044                                              XRenderPictureAttributes attributes = { 0 };
2045                                              XRenderPictFormat * format = XRenderFindStandardFormat(xGlobalDisplay, /*PictStandardRGB24*/ PictStandardARGB32);
2046                                              #if !defined(__APPLE__) && !defined(__OLDX__)
2047                                              attributes.repeat = RepeatNormal;
2048                                              #else
2049                                              attributes.repeat = 1;
2050                                              #endif
2051                                              oglDisplay.pixmapPicture = XRenderCreatePicture(xGlobalDisplay, oglDisplay.pixmap, format, CPRepeat, &attributes);
2052                                              oglDisplay.windowPicture = XRenderCreatePicture(xGlobalDisplay, (X11Window)display.window, format, 0, &attributes);
2053                                              oglDisplay.shapePicture = XRenderCreatePicture(xGlobalDisplay, oglDisplay.shapePixmap,
2054                                                 XRenderFindStandardFormat(xGlobalDisplay, PictStandardA1), 0, &attributes);
2055                                           }
2056
2057                                           oglDisplay.picture = oglDisplay.shminfo.shmaddr;
2058                                           oglDisplay.stride = oglDisplay.image->bytes_per_line / 4;
2059
2060                                           result = true;
2061                                        }
2062                                     }
2063                                  }
2064                               }
2065                            }
2066                         }
2067                      }
2068                   }
2069                }
2070             }
2071             XFree(config);
2072          }
2073      #endif
2074 #endif
2075          CreateDisplay(display);
2076 #if defined(__WIN32__)
2077          wglMakeCurrent(oglDisplay.hdc, oglDisplay.glrc);
2078 #elif defined(__unix__) || defined(__APPLE__)
2079       #if defined(__ANDROID__)
2080          width = eglWidth;
2081          height = eglHeight;
2082       #else
2083          glXMakeCurrent(xGlobalDisplay, (GLXDrawable)display.window, oglDisplay.glContext);
2084       #endif
2085 #endif
2086       }
2087       else
2088 #endif
2089          result = true;
2090       if(!result && display.alphaBlend)
2091       {
2092          printf("Alpha blending windows not supported on this display\n");
2093       }
2094       if(!result)
2095          return false;
2096
2097       result = false;
2098
2099       glViewport(0,0,width,height);
2100       glLoadIdentity();
2101       glOrtho(0,width,height,0,0.0,1.0);
2102       displayWidth = display.width = width;
2103       displayHeight = display.height = height;
2104
2105       if(!oglDisplay.flippingBuffer || oglDisplay.flipBufW < width || oglDisplay.flipBufH < height)
2106       {
2107          oglDisplay.flipBufW = width;
2108          oglDisplay.flipBufH = height;
2109          oglDisplay.flippingBuffer = renew oglDisplay.flippingBuffer ColorAlpha [width * height];
2110       }
2111       if(oglDisplay.flippingBuffer || !width || !height)
2112          result = true;
2113
2114       return result;
2115    }
2116
2117    void DisplayPosition(Display display, int x, int y)
2118    {
2119       OGLDisplay oglDisplay = display.driverData;
2120
2121       oglDisplay.x = x;
2122       oglDisplay.y = y;
2123    }
2124
2125    void SetPalette(Display display, ColorAlpha * palette, bool colorMatch)
2126    {
2127    }
2128
2129    void RestorePalette(Display display)
2130    {
2131    }
2132
2133    void StartUpdate(Display display)
2134    {
2135    }
2136
2137    void EndUpdate(Display display)
2138    {
2139    }
2140
2141    void Scroll(Display display, Box scroll, int x, int y, Extent dirty)
2142    {
2143    }
2144
2145    void Update(Display display, Box updateBox)
2146    {
2147       OGLDisplay oglDisplay = display.driverData;
2148       //Logf("DisplayScreen\n");
2149
2150       glFlush();
2151       glFinish();
2152 #if defined(__WIN32__) || defined(USEPBUFFER)
2153       if(display.alphaBlend)
2154       {
2155          glPixelStorei(GL_PACK_ALIGNMENT, 4);
2156          glPixelStorei(GL_PACK_ROW_LENGTH, oglDisplay.stride);
2157          glPixelStorei(GL_PACK_SKIP_ROWS, 0);
2158          glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
2159          glReadPixels(0,0,display.width,display.height,GL_BGRA_EXT,GL_UNSIGNED_BYTE, oglDisplay.picture);
2160
2161          {
2162 #if defined(__WIN32__)
2163             HDC hdc = GetDC(0);
2164             POINT point = { oglDisplay.x, oglDisplay.y};
2165             POINT srcPoint = { 0, 0 };
2166             BLENDFUNCTION blend = { 0 };
2167             SIZE size;
2168             size.cx = display.width;
2169             size.cy = display.height;
2170             blend.BlendOp = AC_SRC_OVER;
2171             blend.BlendFlags = 0;
2172             blend.SourceConstantAlpha = 255;
2173             blend.AlphaFormat = AC_SRC_ALPHA;
2174
2175             /*
2176             // Process partial images.  Mapping the buffer waits for
2177             // outstanding DMA transfers into the buffer to finish.
2178             glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[0]);
2179             oglDisplay.pboMemory1 = (byte *)glMapBufferARB(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
2180
2181             // glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[1]);
2182             // oglDisplay.pboMemory2 = (byte *)glMapBufferARB(GL_PIXEL_PACK_BUFFER_ARB,GL_READ_ONLY);
2183
2184
2185             memcpy(oglDisplay.picture, oglDisplay.pboMemory1, display.width * display.height * 4);
2186             //memcpy(oglDisplay.picture + display.width * display.height * 4 / 2, oglDisplay.pboMemory2, display.width * display.height * 4/ 2);
2187             */
2188
2189             UpdateLayeredWindow(display.window, hdc, &point, &size, oglDisplay.memDC, &srcPoint, 0, &blend, ULW_ALPHA);
2190             /*
2191
2192             // Unmap the image buffers
2193             glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[0]);
2194             glUnmapBufferARB(GL_PIXEL_PACK_BUFFER_ARB);
2195
2196             // glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[1]);
2197             // glUnmapBufferARB(GL_PIXEL_PACK_BUFFER_ARB);
2198
2199             // Bind two different buffer objects and start the glReadPixels
2200             // asynchronously. Each call will return directly after
2201             // starting the DMA transfer.
2202             glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[0]);
2203             glReadPixels(0, 0, display.width, display.height, GL_BGRA, GL_UNSIGNED_BYTE, 0);
2204
2205             // glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, oglDisplay.imageBuffers[1]);
2206             // glReadPixels(0, display.height/2, display.width, display.height/2, GL_BGRA, GL_UNSIGNED_BYTE, 0);
2207             */
2208
2209             ReleaseDC(0, hdc);
2210 #elif defined(__unix__) || defined(__APPLE__)
2211       #if defined(__ANDROID__)
2212       #else
2213             XTransform transform =
2214             {
2215                {
2216                   { (int)(1.0f * (1<<16)), (int)(0.0f * (1<<16)),  (int)(0 * (1 << 16)) },
2217                   { (int)(0.0f),           (int)(-1.0f * (1<<16)), (int)(0 * (1<<16)) },
2218                   { (int)(0.0f * (1<<16)), (int)(0.0f * (1<<16)),  (int)(1.0f * (1<<16)) }
2219                }
2220             };
2221             XRenderSetPictureTransform(xGlobalDisplay, oglDisplay.pixmapPicture, &transform);
2222             XRenderComposite(xGlobalDisplay, PictOpSrc, oglDisplay.pixmapPicture, None, oglDisplay.shapePicture, 0, 0, 0, 0, 0, 0, display.width, display.height);
2223             XRenderComposite(xGlobalDisplay, PictOpSrc, oglDisplay.pixmapPicture, None, oglDisplay.windowPicture, 0, 0, 0, 0, 0, 0, display.width, display.height);
2224             #if !defined(__APPLE__) && !defined(__OLDX__)
2225             XShapeCombineMask(xGlobalDisplay, (X11Window)display.window, ShapeInput, 0, 0, oglDisplay.shapePixmap, ShapeSet);
2226             #else
2227             XShapeCombineMask(xGlobalDisplay, display.window, 2, 0, 0, oglDisplay.shapePixmap, ShapeSet);
2228             #endif
2229             XFlush(xGlobalDisplay);
2230      #endif
2231 #endif
2232          }
2233       }
2234       else
2235 #endif
2236       {
2237 #if defined(__WIN32__)
2238          //wglSwapLayerBuffers(oglDisplay.hdc,WGL_SWAP_MAIN_PLANE);
2239          SwapBuffers(oglDisplay.hdc);
2240 #elif defined(__unix__) || defined(__APPLE__)
2241       #if defined(__ANDROID__)
2242          eglSwapBuffers(eglDisplay, eglSurface);
2243       #else
2244          glXSwapBuffers(xGlobalDisplay, (GLXDrawable)display.window);
2245       #endif
2246 #endif
2247       }
2248       //Logf("Out of DisplayScreen\n");
2249    }
2250
2251    void FreeBitmap(DisplaySystem displaySystem, Bitmap bitmap)
2252    {
2253       if(bitmap.driverData)
2254       {
2255          GLuint tex = (GLuint)(uintptr)bitmap.driverData;
2256          glDeleteTextures(1, &tex);
2257          bitmap.driverData = 0;
2258       }
2259       bitmap.driver = ((subclass(DisplayDriver))class(LFBDisplayDriver));
2260    }
2261
2262    bool AllocateBitmap(DisplaySystem displaySystem, Bitmap bitmap, int width, int height, int stride, PixelFormat format, bool allocatePalette)
2263    {
2264       OGLSystem oglSystem = displaySystem.driverData;
2265       bool result = false;
2266       Bitmap mipMap { };
2267       GLuint glBitmap = 0;
2268
2269       uint w = width, h = height;
2270       if(oglSystem.pow2textures)
2271       {
2272          w = pow2i(w);
2273          h = pow2i(h);
2274       }
2275       w = Min(w, oglSystem.maxTextureSize);
2276       h = Min(h, oglSystem.maxTextureSize);
2277
2278       glGenTextures(1, &glBitmap);
2279       glBindTexture(GL_TEXTURE_2D, glBitmap);
2280
2281       glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
2282
2283       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2284       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2285
2286       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2287       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2288
2289       glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
2290
2291       mipMap.Allocate(null, w, h, w, pixelFormatRGBA, false);
2292
2293       // glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, mipMap.picture);
2294       glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, mipMap.picture);
2295
2296       delete mipMap;
2297
2298       bitmap.driverData = (void *)(uintptr)glBitmap;
2299       bitmap.driver = displaySystem.driver;
2300       bitmap.width = w;
2301       bitmap.height = h;
2302
2303       result = true;
2304       return result;
2305    }
2306
2307    bool MakeDDBitmap(DisplaySystem displaySystem, Bitmap bitmap, bool mipMaps)
2308    {
2309       bool result = false;
2310       OGLSystem oglSystem = displaySystem.driverData;
2311
2312       // Pre process the bitmap... First make it 32 bit
2313       if(/*bitmap.pixelFormat == pixelFormatRGBA || */bitmap.Convert(null, pixelFormat888, null))
2314       {
2315          int c, level;
2316          uint w = bitmap.width, h = bitmap.height;
2317          GLuint glBitmap = 0;
2318          if(oglSystem.pow2textures)
2319          {
2320             w = pow2i(w);
2321             h = pow2i(h);
2322          }
2323          w = Min(w, oglSystem.maxTextureSize);
2324          h = Min(h, oglSystem.maxTextureSize);
2325
2326          if(mipMaps)
2327          {
2328             while(w * 2 < h) w *= 2;
2329             while(h * 2 < w) h *= 2;
2330          }
2331
2332          // Switch ARGB to RGBA
2333          //if(bitmap.format != pixelFormatRGBA)
2334          {
2335             for(c=0; c<bitmap.size; c++)
2336             {
2337                // ((ColorRGBA *)bitmap.picture)[c] = ((ColorAlpha *)bitmap.picture)[c];
2338                // TODO:
2339                ColorAlpha color = ((ColorAlpha *)bitmap.picture)[c];
2340                ((ColorRGBA *)bitmap.picture)[c] = ColorRGBA { color.color.r, color.color.g, color.color.b, color.a };
2341             }
2342          }
2343          bitmap.pixelFormat = pixelFormat888;
2344
2345          glGetError();
2346          glGenTextures(1, &glBitmap);
2347          if(glBitmap == 0)
2348          {
2349             //int error = glGetError();
2350             return false;
2351          }
2352
2353          glBindTexture(GL_TEXTURE_2D, glBitmap);
2354          glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
2355
2356          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2357          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mipMaps ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
2358          //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2359
2360          //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
2361          //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
2362
2363          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
2364          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
2365
2366          glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
2367
2368          result = true;
2369
2370          for(level = 0; result && (w > 1 || h > 1); level++, w >>= 1, h >>= 1)
2371          {
2372             Bitmap mipMap;
2373             if(bitmap.width != w || bitmap.height != h)
2374             {
2375                mipMap = Bitmap { };
2376                if(mipMap.Allocate(null, w, h, w, bitmap.pixelFormat, false))
2377                {
2378                   Surface mipSurface = mipMap.GetSurface(0,0,null);
2379                   mipSurface.Filter(bitmap, 0,0,0,0, w, h, bitmap.width, bitmap.height);
2380                   delete mipSurface;
2381                }
2382                else
2383                {
2384                   result = false;
2385                   delete mipMap;
2386                }
2387             }
2388             else
2389                mipMap = bitmap;
2390
2391             if(result)
2392             {
2393                int error;
2394                //int width = 0;
2395                glGetError();
2396                // glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA8, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, mipMap.picture);
2397                glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, mipMap.picture);
2398                //printf("Calling glTexImage2D\n");
2399                //glGetTexLevelParameteriv(GL_TEXTURE_2D, level, GL_TEXTURE_WIDTH, &width);
2400                //printf("width = %d (Should be %d, %d)\n", width, w, h);
2401                if((error = glGetError()))
2402                {
2403                   //Logf("OpenGL Bitmap MakeDD error: %d...\n", error);
2404                   //printf("OpenGL Bitmap MakeDD error: %d...\n", error);
2405                   result = false;
2406                }
2407             }
2408             if(mipMap != bitmap)
2409                delete mipMap;
2410             if(!mipMaps) break;
2411          }
2412
2413          if(!bitmap.keepData)
2414             bitmap.driver.FreeBitmap(bitmap.displaySystem, bitmap);
2415          bitmap.driverData = (void *)(uintptr)glBitmap;
2416          bitmap.driver = displaySystem.driver;
2417
2418          if(!result)
2419             FreeBitmap(displaySystem, bitmap);
2420          else if(oglSystem.loadingFont)
2421          {
2422             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
2423             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
2424             oglSystem.loadingFont = false;
2425          }
2426       }
2427       return result;
2428    }
2429
2430    void ReleaseSurface(Display display, Surface surface)
2431    {
2432       glDisable(GL_SCISSOR_TEST);
2433       delete surface.driverData;
2434       surface.driverData = null;
2435    }
2436
2437    bool GetBitmapSurface(DisplaySystem displaySystem, Surface surface, Bitmap bitmap, int x, int y, Box clip)
2438    {
2439       return false;
2440    }
2441
2442    bool GetSurface(Display display, Surface surface, int x,int y, Box clip)
2443    {
2444       bool result = false;
2445       OGLSurface oglSurface = surface.driverData = OGLSurface { };
2446
2447       //Logf("GetSurface\n");
2448
2449       if(oglSurface)
2450       {
2451          if(displayWidth != display.width || displayHeight != display.height)
2452          {
2453             displayWidth = display.width;
2454             displayHeight = display.height;
2455
2456             glViewport(0,0,display.width,display.height);
2457             glLoadIdentity();
2458             glOrtho(0,display.width,display.height,0,0.0,1.0);
2459          }
2460
2461          surface.offset.x = x;
2462          surface.offset.y = y;
2463          surface.unclippedBox = surface.box = clip;
2464          oglSurface.bitmapMult[0] = 1;
2465          oglSurface.bitmapMult[1] = 1;
2466          oglSurface.bitmapMult[2] = 1;
2467          oglSurface.bitmapMult[3] = 1;
2468
2469          glEnable(GL_SCISSOR_TEST);
2470          glScissor(
2471             x+clip.left,
2472             (display.height) -(y+clip.bottom)-1,
2473             clip.right-clip.left+1,
2474             clip.bottom-clip.top+1);
2475          result = true;
2476       }
2477       return result;
2478    }
2479
2480    void Clip(Display display, Surface surface, Box clip)
2481    {
2482       Box box;
2483
2484       //Logf("Clip\n");
2485
2486       if(clip != null)
2487       {
2488          box = clip;
2489          box.Clip(surface.unclippedBox);
2490          surface.box = box;
2491       }
2492       else
2493          box = surface.box = surface.unclippedBox;
2494       box.left += surface.offset.x;
2495       box.top  += surface.offset.y;
2496       box.right+= surface.offset.x;
2497       box.bottom += surface.offset.y;
2498
2499       glScissor(
2500          box.left,display.height - box.bottom - 1,
2501          box.right-box.left+1, box.bottom-box.top+1);
2502    }
2503
2504    bool GrabScreen(Display display, Bitmap bitmap, int x, int y, unsigned int w, unsigned int h)
2505    {
2506       bool result = false;
2507       OGLDisplay oglDisplay = display.driverData;
2508       ColorAlpha * flippingBuffer = oglDisplay.flippingBuffer;
2509
2510       if(oglDisplay.flippingBuffer)
2511       {
2512          if(bitmap.pixelFormat != pixelFormat888 || bitmap.width < w || bitmap.height < h)
2513          {
2514             bitmap.Free();
2515             bitmap.Allocate(null, w,h,w, pixelFormat888, false);
2516          }
2517          if(bitmap)
2518          {
2519             uint row;
2520
2521             glPixelStorei(GL_PACK_ALIGNMENT, 4);
2522             glPixelStorei(GL_PACK_ROW_LENGTH, bitmap.stride);
2523             glPixelStorei(GL_PACK_SKIP_ROWS, 0);
2524             glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
2525             glReadPixels(x,display.height-h-y,w,h,GL_BGRA_EXT,GL_UNSIGNED_BYTE, flippingBuffer);
2526
2527             // Need a flip...
2528             for(row = 0; row<h; row++)
2529                CopyBytesBy4(((ColorAlpha *)bitmap.picture) + row * w, ((ColorAlpha *)flippingBuffer) + (h-row-1) * w, w);
2530             result = true;
2531          }
2532       }
2533       return result;
2534    }
2535
2536    void SetForeground(Display display, Surface surface, ColorAlpha color)
2537    {
2538       OGLSurface oglSurface = surface.driverData;
2539
2540       //Logf("SetForeground\n");
2541
2542       oglSurface.foreground[0] = color.color.r/255.0f;
2543       oglSurface.foreground[1] = color.color.g/255.0f;
2544       oglSurface.foreground[2] = color.color.b/255.0f;
2545       //oglSurface.foreground[3] = 1.0f;
2546       oglSurface.foreground[3] = color.a/255.0f;
2547
2548       //if(!oglSurface.foreground[3])printf("bug");
2549    }
2550
2551    void SetBackground(Display display, Surface surface, ColorAlpha color)
2552    {
2553       OGLSurface oglSurface = surface.driverData;
2554
2555       //Logf("SetBackground\n");
2556
2557       oglSurface.background[0] = color.color.r/255.0f;
2558       oglSurface.background[1] = color.color.g/255.0f;
2559       oglSurface.background[2] = color.color.b/255.0f;
2560       //oglSurface.background[3] = 1.0;
2561       oglSurface.background[3] = color.a/255.0f;
2562    }
2563
2564    void SetBlitTint(Display display, Surface surface, ColorAlpha color)
2565    {
2566       OGLSurface oglSurface = surface.driverData;
2567
2568       oglSurface.bitmapMult[0] = color.color.r/255.0f;
2569       oglSurface.bitmapMult[1] = color.color.g/255.0f;
2570       oglSurface.bitmapMult[2] = color.color.b/255.0f;
2571       oglSurface.bitmapMult[3] = color.a/255.0f;
2572    }
2573
2574    ColorAlpha GetPixel(Display display, Surface surface,int x,int y)
2575    {
2576       return 0;
2577    }
2578
2579    void PutPixel(Display display, Surface surface,int x,int y)
2580    {
2581       OGLSurface oglSurface = surface.driverData;
2582
2583       //Logf("PutPixel\n");
2584
2585       glColor4fv(oglSurface.foreground);
2586       glBegin(GL_POINTS);
2587       // glVertex2i(x+surface.offset.x, y+surface.offset.y);
2588       glVertex2f(x+surface.offset.x + 0.5f, y+surface.offset.y + 0.5f);
2589
2590       glEnd();
2591    }
2592
2593    void DrawLine(Display display, Surface surface, int _x1, int _y1, int _x2, int _y2)
2594    {
2595       OGLSurface oglSurface = surface.driverData;
2596       float x1 = _x1, x2 = _x2, y1 = _y1, y2 = _y2;
2597       if(_x1 == _x2)
2598       {
2599          if(_y2 >= _y1)
2600             y2 += 1;
2601          else
2602             y1 += 1;
2603       }
2604       else if(_y1 == _y2)
2605       {
2606          if(_x2 >= _x1)
2607             x2 += 1;
2608          else
2609             x1 += 1;
2610       }
2611       x1 += surface.offset.x;
2612       y1 += surface.offset.y;
2613       x2 += surface.offset.x;
2614       y2 += surface.offset.y;
2615
2616       //Logf("Line\n");
2617
2618       glColor4fv(oglSurface.foreground);
2619       glBegin(GL_LINES);
2620 #ifdef __ANDROID__
2621       if(stippleEnabled)
2622       {
2623          glTexCoord2f(0.5f, 0);
2624          glVertex2f(x1 + 0.5f, y1 + 0.5f);
2625          glTexCoord2f(Max(x2-x1, y2-y1) + 0.5f, 0);
2626          glVertex2f(x2 + 0.5f, y2 + 0.5f);
2627       }
2628       else
2629 #endif
2630       {
2631          /*
2632          glVertex2i(x1, y1);
2633          glVertex2i(x2, y2);
2634          */
2635          glVertex2f(x1 + 0.5f, y1 + 0.5f);
2636          glVertex2f(x2 + 0.5f, y2 + 0.5f);
2637       }
2638
2639       glEnd();
2640    }
2641
2642    void Rectangle(Display display, Surface surface,int x1,int y1,int x2,int y2)
2643    {
2644       OGLSurface oglSurface = surface.driverData;
2645       x1 += surface.offset.x;
2646       y1 += surface.offset.y;
2647       x2 += surface.offset.x;
2648       y2 += surface.offset.y;
2649
2650       //Logf("Rectangle\n");
2651
2652       glColor4fv(oglSurface.foreground);
2653 #ifdef __ANDROID__
2654       if(stippleEnabled)
2655       {
2656          glBegin(GL_LINES);
2657
2658          glTexCoord2f(0.5f, 0);
2659          glVertex2f(x1 + 0.5f, y1 + 0.5f);
2660          glTexCoord2f(y2-y1 + 0.5f, 0);
2661          glVertex2f(x1 + 0.5f, y2 + 0.5f);
2662
2663          glTexCoord2f(0.5f, 0);
2664          glVertex2f(x1 + 0.5f, y2 + 0.5f);
2665          glTexCoord2f(x2 - x1 + 0.5f, 0);
2666          glVertex2f(x2 + 0.5f, y2 + 0.5f);
2667
2668          glTexCoord2f(0.5f, 0);
2669          glVertex2f(x2 + 0.5f, y2 + 0.5f);
2670          glTexCoord2f(y1 - y2 + 0.5f, 0);
2671          glVertex2f(x2 + 0.5f, y1 + 0.5f);
2672
2673          glTexCoord2f(0.5f, 0);
2674          glVertex2f(x2 + 0.5f, y1 + 0.5f);
2675          glTexCoord2f(x1 - x2 + 0.5f, 0);
2676          glVertex2f(x1 + 0.5f, y1 + 0.5f);
2677       }
2678       else
2679 #endif
2680       {
2681          glBegin(GL_LINE_LOOP);
2682          /*
2683          glVertex2i(x1, y1);
2684          glVertex2i(x1, y2);
2685          glVertex2i(x2, y2);
2686          glVertex2i(x2, y1);
2687          */
2688          glVertex2f(x1 + 0.5f, y1 + 0.5f);
2689          glVertex2f(x1 + 0.5f, y2 + 0.5f);
2690          glVertex2f(x2 + 0.5f, y2 + 0.5f);
2691          glVertex2f(x2 + 0.5f, y1 + 0.5f);
2692       }
2693       glEnd();
2694    }
2695
2696    void Area(Display display, Surface surface,int x1,int y1,int x2,int y2)
2697    {
2698       OGLSurface oglSurface = surface.driverData;
2699       //Logf("Area\n");
2700
2701       glColor4fv(oglSurface.background);
2702       glRecti(x1+surface.offset.x, y1+surface.offset.y,
2703               x2+surface.offset.x + 1, y2+surface.offset.y + 1);
2704
2705       /*
2706       glRectf(x1+surface.offset.x, y1+surface.offset.y,
2707               x2+surface.offset.x + 1, y2+surface.offset.y + 1);
2708       */
2709    }
2710
2711    void Clear(Display display, Surface surface, ClearType type)
2712    {
2713       OGLDisplay oglDisplay = display.driverData;
2714       OGLSurface oglSurface = surface.driverData;
2715
2716       //Logf("Clear\n");
2717       if(type != depthBuffer)
2718          glClearColor(oglSurface.background[0], oglSurface.background[1], oglSurface.background[2], oglSurface.background[3]);
2719       if(type != colorBuffer && !oglDisplay.depthWrite)
2720       {
2721          glDepthMask((byte)bool::true);
2722       }
2723       glClear(((type != depthBuffer) ? GL_COLOR_BUFFER_BIT : 0) |
2724               ((type != colorBuffer) ? GL_DEPTH_BUFFER_BIT : 0));
2725       if(type != colorBuffer && !oglDisplay.depthWrite)
2726       {
2727          glDepthMask((byte)bool::false);
2728       }
2729    }
2730
2731    bool ConvertBitmap(DisplaySystem displaySystem, Bitmap bitmap, PixelFormat format, ColorAlpha * palette)
2732    {
2733       return true;
2734    }
2735
2736    void Blit(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h)
2737    {
2738       OGLSurface oglSurface = surface.driverData;
2739
2740 #if !defined(__OLDX__)
2741          // WHY DO WE HAVE GL_ONE HERE ?
2742          /*if(glBlendFuncSeparate && !oglSurface.writingText)
2743             glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);*/
2744 #endif
2745
2746       if(!oglSurface.writingText)
2747       {
2748          // glTranslatef(-0.375f, -0.375f, 0.0f);
2749          glEnable(GL_TEXTURE_2D);
2750          glColor4fv(oglSurface.bitmapMult);
2751       }
2752       else if(oglSurface.xOffset)
2753          glTranslated(oglSurface.xOffset / 64.0/*-0.375*/, 0.0, 0.0);
2754
2755       glBindTexture(GL_TEXTURE_2D, (GLuint)(uintptr)bitmap.driverData);
2756       glBegin(GL_QUADS);
2757
2758       if(h < 0)
2759       {
2760          glTexCoord2f((float)sx/ bitmap.width, (float)(sy-h)/ bitmap.height);
2761          glVertex2i(dx+surface.offset.x, dy+surface.offset.y);
2762          glTexCoord2f((float)(sx+w) / bitmap.width, (float)(sy-h)/ bitmap.height);
2763          glVertex2i(dx+w+surface.offset.x, dy+surface.offset.y);
2764          glTexCoord2f((float)(sx+w)/ bitmap.width, (float)sy/ bitmap.height);
2765          glVertex2i(dx+w+surface.offset.x, dy-h+surface.offset.y);
2766          glTexCoord2f((float)sx / bitmap.width, (float)sy/ bitmap.height);
2767          glVertex2i(dx+surface.offset.x, dy-h+surface.offset.y);
2768       }
2769       else
2770       {
2771          /*
2772          glTexCoord2f((float)sx / bitmap.width, (float)sy/ bitmap.height);
2773          glVertex2i(dx+surface.offset.x, dy+surface.offset.y);
2774          glTexCoord2f((float)(sx+w)/ bitmap.width, (float)sy/ bitmap.height);
2775          glVertex2i(dx+w+surface.offset.x, dy+surface.offset.y);
2776          glTexCoord2f((float)(sx+w) / bitmap.width, (float)(sy+h)/ bitmap.height);
2777          glVertex2i(dx+w+surface.offset.x, dy+h+surface.offset.y);
2778          glTexCoord2f((float)sx/ bitmap.width, (float)(sy+h)/ bitmap.height);
2779          glVertex2i(dx+surface.offset.x, dy+h+surface.offset.y);
2780          */
2781
2782          glTexCoord2f((float)sx / bitmap.width, (float)sy/ bitmap.height);
2783          glVertex2f((float)dx+surface.offset.x, (float)dy+surface.offset.y);
2784          glTexCoord2f((float)(sx+w)/ bitmap.width, (float)sy/ bitmap.height);
2785          glVertex2f((float)dx+w+surface.offset.x, (float)dy+surface.offset.y);
2786          glTexCoord2f((float)(sx+w) / bitmap.width, (float)(sy+h)/ bitmap.height);
2787          glVertex2f((float)dx+w+surface.offset.x, (float)dy+h+surface.offset.y);
2788          glTexCoord2f((float)sx/ bitmap.width, (float)(sy+h)/ bitmap.height);
2789          glVertex2f((float)dx+surface.offset.x, (float)dy+h+surface.offset.y);
2790       }
2791       glEnd();
2792
2793       if(!oglSurface.writingText)
2794       {
2795          glDisable(GL_TEXTURE_2D);
2796
2797          //glTranslate(0.375, 0.375, 0.0);
2798       }
2799       else if(oglSurface.xOffset)
2800          glTranslated(-oglSurface.xOffset / 64.0/*+0.375*/, 0.0, 0.0);
2801
2802 #if !defined(__OLDX__)
2803          /*if(glBlendFuncSeparate && !oglSurface.writingText)
2804             glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);*/
2805 #endif
2806    }
2807
2808    void Stretch(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h, int sw, int sh)
2809    {
2810       OGLSurface oglSurface = surface.driverData;
2811
2812       //glTranslate(-0.375, -0.375, 0.0);
2813
2814       //Logf("Stretch\n");
2815
2816 #if !defined(__OLDX__)
2817       /*if(glBlendFuncSeparate)
2818          glBlendFuncSeparate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);*/
2819 #endif
2820
2821       glEnable(GL_TEXTURE_2D);
2822       glBindTexture(GL_TEXTURE_2D, (GLuint)(uintptr)bitmap.driverData);
2823
2824       glColor4fv(oglSurface.bitmapMult);
2825
2826       glBegin(GL_QUADS);
2827
2828       if(h < 0)
2829       {
2830          glTexCoord2f((float)(sx)/ bitmap.width, (float)(sy+sh)/ bitmap.height);
2831          glVertex2i(dx+surface.offset.x, dy+surface.offset.y);
2832
2833          glTexCoord2f((float)(sx+sw) / bitmap.width, (float)(sy+sh)/ bitmap.height);
2834          glVertex2i(dx+w+surface.offset.x, dy+surface.offset.y);
2835
2836          glTexCoord2f((float)(sx+sw)/ bitmap.width, (float)(sy)/ bitmap.height);
2837          glVertex2i(dx+w+surface.offset.x, dy-h+surface.offset.y);
2838
2839          glTexCoord2f((float)(sx) / bitmap.width, (float)(sy)/ bitmap.height);
2840          glVertex2i(dx+surface.offset.x, dy-h+surface.offset.y);
2841       }
2842       else
2843       {
2844          glTexCoord2f((float)(sx) / bitmap.width, (float)(sy)/ bitmap.height);
2845          glVertex2i(dx+surface.offset.x, dy+surface.offset.y);
2846
2847          glTexCoord2f((float)(sx+sw)/ bitmap.width, (float)(sy)/ bitmap.height);
2848          glVertex2i(dx+w+surface.offset.x, dy+surface.offset.y);
2849
2850          glTexCoord2f((float)(sx+sw) / bitmap.width, (float)(sy+sh)/ bitmap.height);
2851          glVertex2i(dx+w+surface.offset.x, dy+h+surface.offset.y);
2852
2853          glTexCoord2f((float)(sx)/ bitmap.width, (float)(sy+sh)/ bitmap.height);
2854          glVertex2i(dx+surface.offset.x, dy+h+surface.offset.y);
2855       }
2856
2857       glEnd();
2858
2859       glDisable(GL_TEXTURE_2D);
2860
2861       //glTranslate(0.375, 0.375, 0.0);
2862 #if !defined(__OLDX__)
2863       /*if(glBlendFuncSeparate)
2864          glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);*/
2865 #endif
2866
2867    }
2868
2869    void Filter(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h, int sw, int sh)
2870    {
2871       Stretch(display, surface, bitmap, dx, dy, sx, sy, w, h, sw, sh);
2872    }
2873
2874    void StretchDI(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h, int sw, int sh)
2875    {
2876       float s2dw,s2dh,d2sw,d2sh;
2877       //bool flipX = false, flipY = false;
2878
2879       //Logf("StretchDI\n");
2880
2881       if(Sgn(w) != Sgn(sw))
2882       {
2883          w = Abs(w);
2884          sw = Abs(sw);
2885          //flipX = true;
2886       }
2887       if(Sgn(h) != Sgn(sh))
2888       {
2889          h = Abs(h);
2890          sh = Abs(sh);
2891          //flipY = true;
2892       }
2893
2894       s2dw=(float)w / sw;
2895       s2dh=(float)h / sh;
2896       d2sw=(float)sw / w;
2897       d2sh=(float)sh / h;
2898
2899       //Clip against the edges of the source
2900       if(sx<0)
2901       {
2902          dx+=(int)((0-sx) * s2dw);
2903          w-=(int)((0-sx) * s2dw);
2904          sw-=0-sx;
2905          sx=0;
2906       }
2907       if(sy<0)
2908       {
2909          dy+=(int)((0-sy) * s2dh);
2910          h-=(int)((0-sy) * s2dh);
2911
2912          sh-=0-sy;
2913          sy=0;
2914       }
2915       if(sx+sw>bitmap.width-1)
2916       {
2917          w-=(int)((sx+sw-(bitmap.width-1)-1)*s2dw);
2918          sw-=sx+sw-(bitmap.width-1)-1;
2919       }
2920       if(sy+sh>(bitmap.height-1))
2921       {
2922          h-=(int)((sy+sh-(bitmap.height-1)-1)*s2dh);
2923          sh-=sy+sh-(bitmap.height-1)-1;
2924       }
2925       //Clip against the edges of the surfaceination
2926       if(dx<surface.box.left)
2927       {
2928          //if(!flip)
2929          sx+=(int)((surface.box.left-dx)*d2sw);
2930          sw-=(int)((surface.box.left-dx)*d2sw);
2931          w-=surface.box.left-dx;
2932          dx=surface.box.left;
2933       }
2934       if(dy<surface.box.top)
2935       {
2936          sy+=(int)((surface.box.top-dy)*d2sh);
2937          sh-=(int)((surface.box.top-dy)*d2sh);
2938          h-=surface.box.top-dy;
2939          dy=surface.box.top;
2940       }
2941       if(dx+w>surface.box.right)
2942       {
2943          //if(flip) sx+=(int)((dx+w-surface.box.right-1)*d2sw);
2944          sw-=(int)((dx+w-surface.box.right-1)*d2sw);
2945          w-=dx+w-surface.box.right-1;
2946       }
2947       if(dy+h>surface.box.bottom)
2948       {
2949          sh-=(int)((dy+h-surface.box.bottom-1)*d2sh);
2950          h-=dy+h-surface.box.bottom-1;
2951       }
2952       if((w<=0)||(h<=0)||(sw<=0)||(sh<=0)) return;
2953
2954       dx += surface.offset.x;
2955       dy += surface.offset.y;
2956
2957       if(bitmap.pixelFormat == pixelFormat888 && !bitmap.paletteShades)
2958       {
2959          glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
2960          glPixelStorei(GL_UNPACK_ROW_LENGTH, bitmap.stride);
2961          glPixelStorei(GL_UNPACK_SKIP_PIXELS, sx);
2962          glPixelStorei(GL_UNPACK_SKIP_ROWS, sy);
2963          glRasterPos2d(dx,dy);
2964          //glPixelZoom(flipX ? -s2dw : s2dw, flipY ? s2dh : -s2dh);
2965          glPixelZoom(s2dw, -s2dh);
2966          glDrawPixels(sw,sh,GL_BGRA_EXT,GL_UNSIGNED_BYTE, bitmap.picture);
2967          glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
2968          glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
2969          glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
2970          glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
2971       }
2972    }
2973
2974    void BlitDI(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h)
2975    {
2976       //Logf("BlitDI\n");
2977
2978       //Clip against the edges of the source
2979       if(sx<0)
2980       {
2981          dx+=-sx;
2982          w-=-sx;
2983          sx=0;
2984       }
2985       if(sy<0)
2986       {
2987          dy+=0-sy;
2988          h-=0-sy;
2989          sy=0;
2990       }
2991       if(sx+w>bitmap.width-1)
2992          w-=sx+w-(bitmap.width-1)-1;
2993       if(sy+h>bitmap.height-1)
2994          h-=sy+h-(bitmap.height-1)-1;
2995       //Clip against the edges of the surfaceination
2996       if(dx<surface.box.left)
2997       {
2998          //if(!flip)
2999          sx+=surface.box.left-dx;
3000          w-=surface.box.left-dx;
3001          dx=surface.box.left;
3002       }
3003       if(dy<surface.box.top)
3004       {
3005          sy+=surface.box.top-dy;
3006          h-=surface.box.top-dy;
3007          dy=surface.box.top;
3008       }
3009       if(dx+w>surface.box.right)
3010       {
3011          //if(flip) sx+=dx+w-surface.box.right-1;
3012          w-=dx+w-surface.box.right-1;
3013       }
3014       if(dy+h>surface.box.bottom)
3015          h-=dy+h-surface.box.bottom-1;
3016       if((w<=0)||(h<=0))
3017          return;
3018
3019       dx += surface.offset.x;
3020       dy += surface.offset.y;
3021
3022       if(bitmap.pixelFormat == pixelFormat888 && !bitmap.paletteShades)
3023       {
3024          glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
3025          glPixelStorei(GL_UNPACK_ROW_LENGTH, bitmap.stride);
3026          glPixelStorei(GL_UNPACK_SKIP_PIXELS, sx);
3027          glPixelStorei(GL_UNPACK_SKIP_ROWS, sy);
3028          glRasterPos2d(dx,dy);
3029          glPixelZoom(1,-1);
3030          glDrawPixels(w,h,GL_BGRA_EXT,GL_UNSIGNED_BYTE, bitmap.picture);
3031          glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
3032          glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
3033          glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
3034          glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
3035       }
3036    }
3037
3038    void FilterDI(Display display, Surface surface, Bitmap bitmap, int dx, int dy, int sx, int sy, int w, int h, int sw, int sh)
3039    {
3040       StretchDI(display, surface, bitmap, dx, dy, sx, sy, w, h, sw, sh);
3041    }
3042
3043    void UnloadFont(DisplaySystem displaySystem, Font font)
3044    {
3045       ((subclass(DisplayDriver))class(LFBDisplayDriver)).UnloadFont(displaySystem, font);
3046    }
3047
3048    Font LoadFont(DisplaySystem displaySystem, char * faceName, float size, FontFlags flags)
3049    {
3050       Font font;
3051       OGLSystem oglSystem = displaySystem.driverData;
3052       oglSystem.loadingFont = true;
3053       font = ((subclass(DisplayDriver))class(LFBDisplayDriver)).LoadFont(displaySystem, faceName, size, flags);
3054       return font;
3055    }
3056
3057    void FontExtent(DisplaySystem displaySystem, Font font, char * text, int len, int * width, int * height)
3058    {
3059       ((subclass(DisplayDriver))class(LFBDisplayDriver)).FontExtent(displaySystem, font, text, len, width, height);
3060    }
3061
3062    void WriteText(Display display, Surface surface, int x, int y, char * text, int len)
3063    {
3064       OGLSurface oglSurface = surface.driverData;
3065       OGLSystem oglSystem = display.displaySystem.driverData;
3066       oglSystem.loadingFont = true;
3067
3068       //glTranslated(-0.375, -0.375, 0.0);
3069
3070       //Logf("Blit\n");
3071
3072       if(surface.textOpacity)
3073       {
3074          int w, h;
3075          FontExtent(display.displaySystem, surface.font, text, len, &w, &h);
3076          display.displaySystem.driver.Area(display, surface,x,y,x+w-1,y+h-1);
3077       }
3078
3079       oglSurface.writingText = true;
3080
3081       glEnable(GL_TEXTURE_2D);
3082       glColor4fv(oglSurface.foreground);
3083
3084       ((subclass(DisplayDriver))class(LFBDisplayDriver)).WriteText(display, surface, x, y, text, len);
3085       oglSurface.writingText = false;
3086       oglSystem.loadingFont = false;
3087
3088       glDisable(GL_TEXTURE_2D);
3089
3090       //glTranslated(0.375, 0.375, 0.0);
3091    }
3092
3093    void TextFont(Display display, Surface surface, Font font)
3094    {
3095       ((subclass(DisplayDriver))class(LFBDisplayDriver)).TextFont(display, surface, font);
3096    }
3097
3098    void TextOpacity(Display display, Surface surface, bool opaque)
3099    {
3100       OGLSurface oglSurface = surface.driverData;
3101       oglSurface.opaqueText = opaque;
3102    }
3103
3104    void TextExtent(Display display, Surface surface, char * text, int len, int * width, int * height)
3105    {
3106       OGLSurface oglSurface = surface.driverData;
3107       OGLSystem oglSystem = display.displaySystem.driverData;
3108       oglSystem.loadingFont = true;
3109       FontExtent(display.displaySystem, oglSurface.font, text, len, width, height);
3110       oglSystem.loadingFont = false;
3111    }
3112
3113    void DrawingChar(Display display, Surface surface, char character)
3114    {
3115
3116    }
3117
3118    void LineStipple(Display display, Surface surface, uint32 stipple)
3119    {
3120       //Logf("Stipple\n");
3121
3122       if(stipple)
3123       {
3124 #if defined(__ANDROID__)
3125          stippleEnabled = true;
3126          glesLineStipple(1, (uint16)stipple);
3127 #else
3128          glLineStipple(1, (uint16)stipple);
3129          glEnable(GL_LINE_STIPPLE);
3130 #endif
3131       }
3132       else
3133       {
3134 #if defined(__ANDROID__)
3135          stippleEnabled = false;
3136          glMatrixMode(GL_TEXTURE);
3137          glLoadIdentity();
3138          glMatrixMode(GL_PROJECTION);
3139          glDisable(GL_TEXTURE_2D);
3140 #else
3141          glDisable(GL_LINE_STIPPLE);
3142 #endif
3143       }
3144    }
3145 #if !defined(ECERE_NO3D) && !defined(ECERE_VANILLA)
3146    void SetRenderState(Display display, RenderState state, uint value)
3147    {
3148       OGLDisplay oglDisplay = display.driverData;
3149       //Logf("RenderState\n");
3150
3151       switch(state)
3152       {
3153          case antiAlias:
3154             if(value)
3155                glEnable(GL_MULTISAMPLE_ARB);
3156             else
3157                glDisable(GL_MULTISAMPLE_ARB);
3158             break;
3159          case fillMode:
3160             glPolygonMode(GL_FRONT_AND_BACK, ((FillModeValue)value == solid) ? GL_FILL : GL_LINE);
3161             break;
3162          case depthTest:
3163             if(value) glEnable(GL_DEPTH_TEST); else glDisable(GL_DEPTH_TEST);
3164             break;
3165          case depthWrite:
3166             if(value) glDepthMask((byte)bool::true); else glDepthMask((byte)bool::false);
3167             oglDisplay.depthWrite = (bool)value;
3168             break;
3169          case fogColor:
3170          {
3171             float color[4] = { ((Color)value).r/255.0f, ((Color)value).g/255.0f, ((Color)value).b/255.0f, 1.0f };
3172             glFogfv(GL_FOG_COLOR, (float *)&color);
3173             break;
3174          }
3175          case fogDensity:
3176             value *= nearPlane;
3177             glFogf(GL_FOG_DENSITY, *(float *)(void *)&value);
3178             break;
3179          case blend:
3180             if(value) glEnable(GL_BLEND); else glDisable(GL_BLEND);
3181             break;
3182          case ambient:
3183          {
3184             float ambient[4] = { ((Color)value).r/255.0f, ((Color)value).g/255.0f, ((Color)value).b/255.0f, 1.0f };
3185             glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
3186             break;
3187          }
3188          case alphaWrite:
3189          {
3190             if(value) glColorMask(1,1,1,1); else glColorMask(1,1,1,0);
3191             break;
3192          }
3193          case vSync:
3194          {
3195 #if defined(__WIN32__)
3196             wglSwapIntervalEXT(value ? 1 : 0);
3197 #endif
3198             break;
3199          }
3200       }
3201    }
3202
3203    void SetLight(Display display, int id, Light light)
3204    {
3205       //Logf("SetLight\n");
3206
3207       if(light != null)
3208       {
3209          Object lightObject = light.lightObject;
3210          float position[4] = { 0, 0, 0, 0 };
3211          float color[4] = { 0, 0, 0, 1 };
3212
3213          glEnable(GL_LIGHT0 + id);
3214          /*
3215          glLightfv(GL_LIGHT0 + id, GL_DIFFUSE, (float *)&light.diffuse);
3216          glLightfv(GL_LIGHT0 + id, GL_AMBIENT, (float *)&light.ambient);
3217          glLightfv(GL_LIGHT0 + id, GL_SPECULAR,(float *)&light.specular);
3218          */
3219
3220          if(!light.multiplier) light.multiplier = 1.0f;
3221
3222          color[0] = light.diffuse.r * light.multiplier;
3223          color[1] = light.diffuse.g * light.multiplier;
3224          color[2] = light.diffuse.b * light.multiplier;
3225          glLightfv(GL_LIGHT0 + id, GL_DIFFUSE, color);
3226
3227          color[0] = light.ambient.r * light.multiplier;
3228          color[1] = light.ambient.g * light.multiplier;
3229          color[2] = light.ambient.b * light.multiplier;
3230          glLightfv(GL_LIGHT0 + id, GL_AMBIENT, color);
3231          color[0] = light.specular.r * light.multiplier;
3232          color[1] = light.specular.g * light.multiplier;
3233          color[2] = light.specular.b * light.multiplier;
3234          glLightfv(GL_LIGHT0 + id, GL_SPECULAR,color);
3235
3236          if(lightObject)
3237          {
3238             Vector3D positionVector;
3239             if(light.flags.spot)
3240             {
3241                if(lightObject.flags.root || !lightObject.parent)
3242                {
3243                   positionVector = lightObject.transform.position;
3244                   positionVector.Subtract(positionVector, display.display3D.camera.cPosition);
3245                }
3246                else
3247                {
3248                   positionVector.MultMatrix(lightObject.transform.position, lightObject.parent.matrix);
3249                   if(display.display3D.camera)
3250                      positionVector.Subtract(positionVector, display.display3D.camera.cPosition);
3251                }
3252                position[3] = 1;
3253             }
3254             else
3255             {
3256                if(!light.direction.x && !light.direction.y && !light.direction.z)
3257                {
3258                   Vector3Df vector { 0,0,-1 };
3259                   Matrix mat;
3260                   mat.RotationQuaternion(light.orientation);
3261                   positionVector.MultMatrixf(vector, mat);
3262                }
3263                else
3264                {
3265                   positionVector = light.direction;
3266                   position[3] = 1;
3267                }
3268             }
3269
3270             position[0] = (float)positionVector.x;
3271             position[1] = (float)positionVector.y;
3272             position[2] = (float)positionVector.z;
3273
3274             glLightfv(GL_LIGHT0 + id, GL_POSITION, position);
3275
3276             /*
3277             // Display Light Position
3278             glDisable(GL_LIGHTING);
3279             glDisable(GL_DEPTH_TEST);
3280             glColor3f(1,1,1);
3281             glPointSize(10);
3282             glBegin(GL_POINTS);
3283             glVertex3fv(position);
3284             glEnd();
3285             glEnable(GL_DEPTH_TEST);
3286             glEnable(GL_LIGHTING);
3287
3288
3289             // Display Target
3290             if(lightObject.flags.root || !lightObject.parent)
3291             {
3292                positionVector = light.target.transform.position;
3293                positionVector.Subtract(positionVector, display.camera.cPosition);
3294             }
3295             else
3296             {
3297                positionVector.MultMatrix(light.target.transform.position,
3298                   lightObject.light.target.parent.matrix);
3299                positionVector.Subtract(positionVector, display.camera.cPosition);
3300             }
3301
3302             position[0] = positionVector.x;
3303             position[1] = positionVector.y;
3304             position[2] = positionVector.z;
3305
3306             glDisable(GL_LIGHTING);
3307             glDisable(GL_DEPTH_TEST);
3308             glColor3f(1,1,0);
3309             glPointSize(10);
3310             glBegin(GL_POINTS);
3311             glVertex3fv(position);
3312             glEnd();
3313             glEnable(GL_DEPTH_TEST);
3314             glEnable(GL_LIGHTING);
3315             */
3316
3317             if(light.flags.attenuation)
3318             {
3319                glLightf(GL_LIGHT0 + id, GL_CONSTANT_ATTENUATION, light.Kc);
3320                glLightf(GL_LIGHT0 + id, GL_LINEAR_ATTENUATION, light.Kl);
3321                glLightf(GL_LIGHT0 + id, GL_QUADRATIC_ATTENUATION, light.Kq);
3322             }
3323
3324             if(light.flags.spot)
3325             {
3326                float exponent = 0;
3327                #define MAXLIGHT  0.9
3328                float direction[4] = { (float)light.direction.x, (float)light.direction.y, (float)light.direction.z, 1 };
3329                // Figure out exponent out of the hot spot
3330                exponent = (float)(log(MAXLIGHT) / log(cos((light.hotSpot / 2))));
3331
3332                glLightfv(GL_LIGHT0 + id, GL_SPOT_DIRECTION, direction);
3333                glLightf(GL_LIGHT0 + id, GL_SPOT_CUTOFF, (float)(light.fallOff / 2));
3334                glLightf(GL_LIGHT0 + id, GL_SPOT_EXPONENT, exponent);
3335             }
3336          }
3337          else
3338          {
3339
3340             Vector3Df vector { 0,0,-1 };
3341             Vector3Df direction;
3342             Matrix mat;
3343
3344             mat.RotationQuaternion(light.orientation);
3345             direction.MultMatrix(vector, mat);
3346
3347             position[0] = direction.x;
3348             position[1] = direction.y;
3349             position[2] = direction.z;
3350
3351             glLightfv(GL_LIGHT0 + id, GL_POSITION, position);
3352          }
3353       }
3354       else
3355          glDisable(GL_LIGHT0 + id);
3356    }
3357
3358    void SetCamera(Display display, Surface surface, Camera camera)
3359    {
3360       OGLDisplay oglDisplay = display.driverData;
3361       //Logf("SetCamera\n");
3362
3363       if(camera)
3364       {
3365          int left = surface.box.left + surface.offset.x;
3366          int top = surface.box.top  + surface.offset.y;
3367          int right = surface.box.right + surface.offset.x;
3368          int bottom = surface.box.bottom + surface.offset.y;
3369          float origX = surface.offset.x + camera.origin.x;
3370          float origY = surface.offset.y + camera.origin.y;
3371          int x = left;
3372          int y = display.height - bottom - 1;
3373          int w = right - left + 1;
3374          int h = bottom - top + 1;
3375
3376          // *** ViewPort ***
3377          glViewport(x, y, w, h);
3378
3379          // *** Projection Matrix ***
3380          if(!display.display3D.camera)
3381             glPushMatrix();
3382          else
3383             glMatrixMode(GL_PROJECTION);
3384          if(display.display3D.collectingHits)
3385          {
3386             float pickX = display.display3D.pickX + surface.offset.x;
3387             float pickY = display.height - (display.display3D.pickY + surface.offset.y) - 1;
3388             Matrix pickMatrix
3389             {
3390                {
3391                   w / display.display3D.pickWidth, 0, 0, 0,
3392                   0, h / display.display3D.pickHeight, 0, 0,
3393                   0, 0, 1, 0,
3394                   (w + 2.0f * (x - pickX)) / display.display3D.pickWidth,
3395                   (h + 2.0f * (y - pickY)) / display.display3D.pickHeight, 0, 1
3396                }
3397             };
3398             glLoadMatrixd(pickMatrix.array);
3399          }
3400          else
3401             glLoadIdentity();
3402          glFrustum(
3403             (left   - origX) * camera.zMin / camera.focalX,
3404             (right  - origX) * camera.zMin / camera.focalX,
3405             (bottom - origY) * camera.zMin / camera.focalY,
3406             (top    - origY) * camera.zMin / camera.focalY,
3407             camera.zMin, camera.zMax);
3408
3409          glDisable(GL_BLEND);
3410
3411          // *** Z Inverted Identity Matrix ***
3412          glMatrixMode(GL_MODELVIEW);
3413          if(!display.display3D.camera)
3414             glPushMatrix();
3415
3416          glLoadIdentity();
3417
3418          glScaled(1.0/nearPlane, 1.0/nearPlane, -1.0/nearPlane);
3419
3420          // *** View Matrix ***
3421          glMultMatrixd(camera.viewMatrix.array);
3422
3423          // *** Lights ***
3424          // ...
3425
3426          glEnable(GL_DEPTH_TEST);
3427          glEnable(GL_LIGHTING);
3428          glShadeModel(GL_SMOOTH);
3429          glDepthMask((byte)bool::true);
3430          oglDisplay.depthWrite = true;
3431
3432          glEnable(GL_MULTISAMPLE_ARB);
3433       }
3434       else if(display.display3D.camera)
3435       {
3436          oglDisplay.depthWrite = false;
3437          glViewport(0,0,display.width,display.height);
3438
3439          glDisable(GL_CULL_FACE);
3440          glDisable(GL_DEPTH_TEST);
3441          glDisable(GL_LIGHTING);
3442          glDisable(GL_FOG);
3443          glDisable(GL_TEXTURE_2D);
3444          glShadeModel(GL_FLAT);
3445          glEnable(GL_BLEND);
3446          glDisable(GL_MULTISAMPLE_ARB);
3447
3448          // *** Restore 2D MODELVIEW Matrix ***
3449          glPopMatrix();
3450
3451          // *** Restore 2D PROJECTION Matrix ***
3452          glMatrixMode(GL_PROJECTION);
3453          glPopMatrix();
3454       }
3455
3456       GLBindBuffer(GL_ARRAY_BUFFER_ARB, 0);
3457    }
3458
3459    void ApplyMaterial(Display display, Material material, Mesh mesh)
3460    {
3461       //Logf("ApplyMaterial\n");
3462
3463       // Basic Properties
3464       if(material.flags.doubleSided)
3465       {
3466          glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, !material.flags.singleSideLight);
3467          glDisable(GL_CULL_FACE);
3468       }
3469       else
3470       {
3471          glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, bool::false);
3472          glEnable(GL_CULL_FACE);
3473       }
3474
3475       // Fog
3476       if(material.flags.noFog)
3477          glDisable(GL_FOG);
3478       else
3479          glEnable(GL_FOG);
3480
3481       // Maps
3482       if(material.baseMap && mesh.texCoords)
3483       {
3484          Bitmap map = material.baseMap;
3485          glEnable(GL_TEXTURE_2D);
3486          glBindTexture(GL_TEXTURE_2D, (GLuint)(uintptr)map.driverData);
3487
3488          glMatrixMode(GL_TEXTURE);
3489          glLoadIdentity();
3490          if(material.uScale && material.vScale)
3491             glScalef(material.uScale, material.vScale, 1);
3492          glMatrixMode(GL_MODELVIEW);
3493
3494          if(material.flags.tile)
3495          {
3496             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
3497             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
3498          }
3499          else
3500          {
3501             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
3502             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
3503          }
3504       }
3505       else
3506          glDisable(GL_TEXTURE_2D);
3507
3508       if(mesh.flags.colors)
3509       {
3510          glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
3511          glEnable(GL_COLOR_MATERIAL);
3512       }
3513       else
3514       {
3515          glDisable(GL_COLOR_MATERIAL);
3516          {
3517             float color[4] = { material.diffuse.r, material.diffuse.g, material.diffuse.b, material.opacity };
3518             glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, color);
3519          }
3520          {
3521             float color[4] = { material.ambient.r, material.ambient.g, material.ambient.b, 0 };
3522             glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, color);
3523          }
3524       }
3525       {
3526          float color[4] = { material.specular.r, material.specular.g, material.specular.b, 0 };
3527          glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, color);
3528       }
3529       {
3530          float color[4] = { material.emissive.r, material.emissive.g, material.emissive.b, 0 };
3531          glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, color);
3532       }
3533
3534       glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, &material.power);
3535    }
3536
3537    void FreeMesh(DisplaySystem displaySystem, Mesh mesh)
3538    {
3539       OGLMesh oglMesh = mesh.data;
3540       if(oglMesh)
3541       {
3542          if(!mesh.flags.vertices)
3543          {
3544             if(oglMesh.vertices)
3545             {
3546                GLDeleteBuffers(1, &oglMesh.vertices);
3547                oglMesh.vertices = 0;
3548             }
3549             delete mesh.vertices;
3550          }
3551          if(!mesh.flags.normals)
3552          {
3553             if(oglMesh.normals)
3554             {
3555                GLDeleteBuffers(1, &oglMesh.normals);
3556                oglMesh.normals = 0;
3557             }
3558             delete mesh.normals;
3559          }
3560          if(!mesh.flags.texCoords1)
3561          {
3562             if(oglMesh.texCoords)
3563             {
3564                GLDeleteBuffers(1, &oglMesh.texCoords);
3565                oglMesh.texCoords = 0;
3566             }
3567             delete mesh.texCoords;
3568          }
3569          if(!mesh.flags.texCoords2)
3570          {
3571             if(oglMesh.texCoords2)
3572             {
3573                GLDeleteBuffers(1, &oglMesh.texCoords2);
3574                oglMesh.texCoords2 = 0;
3575             }
3576             /*
3577             delete mesh.texCoords2;
3578             */
3579          }
3580          if(!mesh.flags.colors)
3581          {
3582             if(oglMesh.colors)
3583             {
3584                GLDeleteBuffers(1, &oglMesh.colors);
3585                oglMesh.colors = 0;
3586             }
3587          }
3588          if(!mesh.flags)
3589          {
3590             delete oglMesh;
3591             mesh.data = null;
3592          }
3593       }
3594    }
3595
3596    bool AllocateMesh(DisplaySystem displaySystem, Mesh mesh)
3597    {
3598       bool result = false;
3599
3600       if(!mesh.data)
3601          mesh.data = OGLMesh { };
3602       if(mesh.data)
3603       {
3604          OGLMesh oglMesh = mesh.data;
3605
3606          if(mesh.flags.vertices && !oglMesh.vertices && !mesh.vertices)
3607          {
3608             mesh.vertices = mesh.flags.doubleVertices ? (Vector3Df *)new Vector3D[mesh.nVertices] : new Vector3Df[mesh.nVertices];
3609             GLGenBuffers(1, &oglMesh.vertices);
3610          }
3611          if(mesh.flags.normals && !oglMesh.normals && !mesh.normals)
3612          {
3613             GLGenBuffers( 1, &oglMesh.normals);
3614             mesh.normals = mesh.flags.doubleNormals ? (Vector3Df *)new Vector3D[mesh.nVertices] : new Vector3Df[mesh.nVertices];
3615          }
3616          if(mesh.flags.texCoords1 && !oglMesh.texCoords && !mesh.texCoords)
3617          {
3618             GLGenBuffers( 1, &oglMesh.texCoords);
3619             mesh.texCoords = new Pointf[mesh.nVertices];
3620          }
3621          if(mesh.flags.colors && !oglMesh.colors && !mesh.colors)
3622          {
3623             GLGenBuffers( 1, &oglMesh.colors);
3624             mesh.colors = new ColorRGBAf[mesh.nVertices];
3625          }
3626          result = true;
3627       }
3628       return result;
3629    }
3630
3631    void UnlockMesh(DisplaySystem displaySystem, Mesh mesh, MeshFeatures flags)
3632    {
3633       OGLMesh oglMesh = mesh.data;
3634       if(!flags) flags = mesh.flags;
3635
3636       if(vboAvailable)
3637       {
3638          if(!(flags.vertices) || oglMesh.vertices)
3639          {
3640             GLBindBuffer(GL_ARRAY_BUFFER_ARB, oglMesh.vertices);
3641             GLBufferData( mesh.flags.doubleVertices ? GL_DOUBLE : GL_FLOAT, GL_ARRAY_BUFFER_ARB, mesh.nVertices * (mesh.flags.doubleVertices ? sizeof(Vector3D) : sizeof(Vector3Df)), mesh.vertices, GL_STATIC_DRAW_ARB );
3642          }
3643
3644          if(!(flags.normals) || oglMesh.normals)
3645          {
3646             GLBindBuffer(GL_ARRAY_BUFFER_ARB, oglMesh.normals);
3647             GLBufferData( mesh.flags.doubleNormals ? GL_DOUBLE : GL_FLOAT, GL_ARRAY_BUFFER_ARB, mesh.nVertices * (mesh.flags.doubleNormals ? sizeof(Vector3D) : sizeof(Vector3Df)), mesh.normals, GL_STATIC_DRAW_ARB );
3648          }
3649
3650          if(!(flags.texCoords1) || oglMesh.texCoords)
3651          {
3652             GLBindBuffer(GL_ARRAY_BUFFER_ARB, oglMesh.texCoords);
3653             GLBufferData( GL_FLOAT, GL_ARRAY_BUFFER_ARB, mesh.nVertices * sizeof(Pointf), mesh.texCoords, GL_STATIC_DRAW_ARB );
3654          }
3655
3656          if(!(flags.colors) || oglMesh.colors)
3657          {
3658             GLBindBuffer( GL_ARRAY_BUFFER_ARB, oglMesh.colors);
3659             GLBufferData( GL_FLOAT, GL_ARRAY_BUFFER_ARB, mesh.nVertices * sizeof(ColorRGBAf), mesh.colors, GL_STATIC_DRAW_ARB );
3660          }
3661
3662          GLBindBuffer( GL_ARRAY_BUFFER_ARB, 0);
3663       }
3664    }
3665
3666    bool LockMesh(DisplaySystem displaySystem, Mesh mesh, MeshFeatures flags)
3667    {
3668       bool result = true;
3669
3670         return result;
3671    }
3672
3673    void FreeIndices(DisplaySystem displaySystem, OGLIndices oglIndices)
3674    {
3675       if(oglIndices)
3676       {
3677          if(oglIndices.buffer)
3678             GLDeleteBuffers(1, &oglIndices.buffer);
3679          delete oglIndices.indices;
3680          delete oglIndices;
3681       }
3682    }
3683
3684    void * AllocateIndices(DisplaySystem displaySystem, int nIndices, bool indices32bit)
3685    {
3686       OGLIndices oglIndices = OGLIndices { };
3687       if(oglIndices)
3688       {
3689          oglIndices.indices = (void *)(indices32bit ? new uint32[nIndices] : new uint16[nIndices]);
3690          GLGenBuffers( 1, &oglIndices.buffer);
3691          oglIndices.nIndices = nIndices;
3692       }
3693       return oglIndices;
3694    }
3695
3696    void UnlockIndices(DisplaySystem displaySystem, OGLIndices oglIndices, bool indices32bit, int nIndices)
3697    {
3698       if(vboAvailable)
3699       {
3700          GLBindBuffer( GL_ELEMENT_ARRAY_BUFFER_ARB, oglIndices.buffer);
3701          GLBufferData( indices32bit ? GL_UNSIGNED_INT : GL_UNSIGNED_SHORT, GL_ELEMENT_ARRAY_BUFFER_ARB, nIndices * (indices32bit ? sizeof(uint32) : sizeof(uint16)),
3702             oglIndices.indices, GL_STATIC_DRAW_ARB);
3703          GLBindBuffer( GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
3704       }
3705    }
3706
3707    uint16 * LockIndices(DisplaySystem displaySystem, OGLIndices oglIndices)
3708    {
3709
3710       return oglIndices.indices;
3711    }
3712
3713    void SelectMesh(Display display, Mesh mesh)
3714    {
3715       //Logf("SelectMesh\n");
3716
3717 #if !defined( __ANDROID__) && !defined(__APPLE__)
3718       if(display.display3D.mesh && glUnlockArraysEXT)
3719          glUnlockArraysEXT();
3720 #endif
3721       if(mesh)
3722       {
3723          OGLMesh oglMesh = mesh.data;
3724
3725          // *** Vertex Stream ***
3726          glEnableClientState(GL_VERTEX_ARRAY);
3727          if(!display.display3D.collectingHits && oglMesh)
3728          {
3729             GLBindBuffer(GL_ARRAY_BUFFER_ARB, oglMesh.vertices );
3730             glVertexPointer(3, mesh.flags.doubleVertices ? GL_DOUBLE : GL_FLOAT, 0, vboAvailable ? null : mesh.vertices);
3731
3732             // *** Normals Stream ***
3733             if(mesh.normals)
3734             {
3735                glEnableClientState(GL_NORMAL_ARRAY);
3736                GLBindBuffer(GL_ARRAY_BUFFER_ARB, oglMesh.normals);
3737                glNormalPointer(mesh.flags.doubleNormals ? GL_DOUBLE : GL_FLOAT, 0, vboAvailable ? null : mesh.normals);
3738             }
3739             else
3740                glDisableClientState(GL_NORMAL_ARRAY);
3741
3742             // *** Texture Coordinates Stream ***
3743             if(mesh.texCoords)
3744             {
3745                glEnableClientState(GL_TEXTURE_COORD_ARRAY);
3746                GLBindBuffer( GL_ARRAY_BUFFER_ARB, oglMesh.texCoords);
3747                glTexCoordPointer(2, GL_FLOAT, 0, vboAvailable ? null : mesh.texCoords);
3748             }
3749             else
3750                glDisableClientState(GL_TEXTURE_COORD_ARRAY);
3751
3752             // *** Color Stream ***
3753             if(mesh.colors)
3754             {
3755                glEnableClientState(GL_COLOR_ARRAY);
3756                GLBindBuffer( GL_ARRAY_BUFFER_ARB, oglMesh.colors);
3757                glColorPointer(4, GL_FLOAT, 0, vboAvailable ? null : mesh.colors);
3758             }
3759             else
3760                glDisableClientState(GL_COLOR_ARRAY);
3761
3762          }
3763          else
3764          {
3765             GLBindBuffer( GL_ARRAY_BUFFER_ARB, 0);
3766             glVertexPointer(3,mesh.flags.doubleVertices ? GL_DOUBLE : GL_FLOAT,0,mesh.vertices);
3767             if(mesh.normals && !display.display3D.collectingHits)
3768             {
3769                glEnableClientState(GL_NORMAL_ARRAY);
3770                glNormalPointer(mesh.flags.doubleNormals ? GL_DOUBLE : GL_FLOAT, 0, mesh.normals);
3771             }
3772             else
3773                glDisableClientState(GL_NORMAL_ARRAY);
3774             if(mesh.texCoords && !display.display3D.collectingHits)
3775             {
3776                glEnableClientState(GL_TEXTURE_COORD_ARRAY);
3777                glTexCoordPointer(2, GL_FLOAT, 0, mesh.texCoords);
3778             }
3779             else
3780                glDisableClientState(GL_TEXTURE_COORD_ARRAY);
3781             if(mesh.colors && !display.display3D.collectingHits)
3782             {
3783                glEnableClientState(GL_COLOR_ARRAY);
3784                glColorPointer(4, GL_FLOAT, 0, mesh.colors);
3785             }
3786             else
3787                glDisableClientState(GL_COLOR_ARRAY);
3788          }
3789
3790 #if !defined(__ANDROID__) && !defined(__APPLE__)
3791          if(glLockArraysEXT) glLockArraysEXT(0, mesh.nVertices);
3792 #endif
3793       }
3794       else
3795          GLBindBuffer(GL_ARRAY_BUFFER_ARB, 0);
3796    }
3797
3798    void DrawPrimitives(Display display, PrimitiveSingle * primitive, Mesh mesh)
3799    {
3800       //Logf("DrawPrimitives\n");
3801
3802       if(primitive->type.vertexRange)
3803          glDrawArrays(primitiveTypes[primitive->type.primitiveType], primitive->first, primitive->nVertices);
3804       else
3805       {
3806          //    *** Hoping the data won't be uploaded at all (Won't really work if another group of the mesh is using the mesh ) ***
3807          // HACK TO SPEED THINGS UP...
3808 #ifndef __ANDROID__
3809          GLBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
3810          if(primitive->nIndices < (mesh.nVertices >> 2) && !primitive->type.indices32bit)
3811          {
3812             int c;
3813             glBegin(primitiveTypes[primitive->type.primitiveType]);
3814             if(primitive->data)
3815             {
3816                OGLIndices oglIndices = primitive->data;
3817                MeshFeatures flags = mesh.flags;
3818                for(c = 0; c<primitive->nIndices; c++)
3819                {
3820                   uint16 index = ((uint16 *) oglIndices.indices)[c];
3821                   if(flags.normals) glNormal3fv((float *)&mesh.normals[index]);
3822                   if(flags.texCoords1) glTexCoord2fv((float *)&mesh.texCoords[index]);
3823                   if(flags.colors) glColor4fv((float *)&mesh.colors[index]);
3824                   glVertex3fv((float *)&mesh.vertices[index]);
3825                }
3826             }
3827             glEnd();
3828          }
3829          else
3830 #endif
3831          {
3832             OGLIndices oglIndices = primitive->data;
3833
3834             if(!display.display3D.collectingHits && vboAvailable && oglIndices)
3835             {
3836                GLBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB, oglIndices.buffer);
3837                glDrawElements(primitiveTypes[primitive->type.primitiveType], primitive->nIndices,
3838                   primitive->type.indices32bit ? GL_UNSIGNED_INT : GL_UNSIGNED_SHORT, 0);
3839                GLBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
3840             }
3841             else
3842                glDrawElements(primitiveTypes[primitive->type.primitiveType], primitive->nIndices,
3843                   primitive->type.indices32bit ? GL_UNSIGNED_INT : GL_UNSIGNED_SHORT, oglIndices ? oglIndices.indices : primitive->indices);
3844          }
3845       }
3846    }
3847
3848    void PushMatrix(Display display)
3849    {
3850       glPushMatrix();
3851    }
3852
3853    void PopMatrix(Display display, bool setMatrix)
3854    {
3855       glPopMatrix();
3856    }
3857
3858    void SetTransform(Display display, Matrix transMatrix, bool viewSpace, bool useCamera)
3859    {
3860       Matrix matrix = transMatrix;
3861       Camera camera = useCamera ? display.display3D.camera : null;
3862
3863       if(viewSpace)
3864       {
3865          glLoadIdentity();
3866          glScaled(1.0/nearPlane, 1.0/nearPlane, -1.0/nearPlane);
3867       }
3868       else if(camera)
3869       {
3870          glTranslated(
3871             matrix.m[3][0] - camera.cPosition.x,
3872             matrix.m[3][1] - camera.cPosition.y,
3873             matrix.m[3][2] - camera.cPosition.z);
3874       }
3875       else
3876          glTranslated(
3877             matrix.m[3][0],
3878             matrix.m[3][1],
3879             matrix.m[3][2]);
3880
3881       matrix.m[3][0] = 0;
3882       matrix.m[3][1] = 0;
3883       matrix.m[3][2] = 0;
3884
3885       glMultMatrixd(matrix.array);
3886    }
3887 #endif
3888 }
3889
3890 public void UseSingleGLContext(bool useSingle)
3891 {
3892    useSingleGLContext = useSingle;
3893 }
3894
3895 default dllexport void * __attribute__((stdcall)) IS_GLGetContext(DisplaySystem displaySystem)
3896 {
3897    if(displaySystem)
3898    {
3899       OGLSystem system = displaySystem.driverData;
3900 #if defined(__WIN32__)
3901       return system.glrc;
3902 #else
3903       return system.glContext;
3904 #endif
3905    }
3906    return null;
3907 }
3908
3909 #endif