+++ /dev/null
-
-/* pngget.c - retrieval of values from info struct
- *
- * Last changed in libpng 1.4.0 [January 3, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- */
-
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-#include "pngpriv.h"
-
-png_uint_32 PNGAPI
-png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->valid & flag);
-
- else
- return(0);
-}
-
-png_size_t PNGAPI
-png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->rowbytes);
-
- else
- return(0);
-}
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
-png_bytepp PNGAPI
-png_get_rows(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->row_pointers);
-
- else
- return(0);
-}
-#endif
-
-#ifdef PNG_EASY_ACCESS_SUPPORTED
-/* Easy access to info, added in libpng-0.99 */
-png_uint_32 PNGAPI
-png_get_image_width(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->width;
-
- return (0);
-}
-
-png_uint_32 PNGAPI
-png_get_image_height(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->height;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->bit_depth;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_color_type(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->color_type;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->filter_type;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->interlace_type;
-
- return (0);
-}
-
-png_byte PNGAPI
-png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return info_ptr->compression_type;
-
- return (0);
-}
-
-png_uint_32 PNGAPI
-png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
-#ifdef PNG_pHYs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_pHYs)
- {
- png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter");
-
- if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
- return (0);
-
- else
- return (info_ptr->x_pixels_per_unit);
- }
-#else
- return (0);
-#endif
- return (0);
-}
-
-png_uint_32 PNGAPI
-png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
-#ifdef PNG_pHYs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_pHYs)
- {
- png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter");
-
- if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
- return (0);
-
- else
- return (info_ptr->y_pixels_per_unit);
- }
-#else
- return (0);
-#endif
- return (0);
-}
-
-png_uint_32 PNGAPI
-png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
-#ifdef PNG_pHYs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_pHYs)
- {
- png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
-
- if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
- info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
- return (0);
-
- else
- return (info_ptr->x_pixels_per_unit);
- }
-#else
- return (0);
-#endif
- return (0);
-}
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-float PNGAPI
-png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
- {
- if (png_ptr != NULL && info_ptr != NULL)
-#ifdef PNG_pHYs_SUPPORTED
-
- if (info_ptr->valid & PNG_INFO_pHYs)
- {
- png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
-
- if (info_ptr->x_pixels_per_unit == 0)
- return ((float)0.0);
-
- else
- return ((float)((float)info_ptr->y_pixels_per_unit
- /(float)info_ptr->x_pixels_per_unit));
- }
-#else
- return (0.0);
-#endif
- return ((float)0.0);
-}
-#endif
-
-png_int_32 PNGAPI
-png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
-#ifdef PNG_oFFs_SUPPORTED
-
- if (info_ptr->valid & PNG_INFO_oFFs)
- {
- png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
-
- if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
- return (0);
-
- else
- return (info_ptr->x_offset);
- }
-#else
- return (0);
-#endif
- return (0);
-}
-
-png_int_32 PNGAPI
-png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
-
-#ifdef PNG_oFFs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_oFFs)
- {
- png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
-
- if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
- return (0);
-
- else
- return (info_ptr->y_offset);
- }
-#else
- return (0);
-#endif
- return (0);
-}
-
-png_int_32 PNGAPI
-png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
-
-#ifdef PNG_oFFs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_oFFs)
- {
- png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
-
- if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
- return (0);
-
- else
- return (info_ptr->x_offset);
- }
-#else
- return (0);
-#endif
- return (0);
-}
-
-png_int_32 PNGAPI
-png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
-
-#ifdef PNG_oFFs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_oFFs)
- {
- png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
-
- if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
- return (0);
-
- else
- return (info_ptr->y_offset);
- }
-#else
- return (0);
-#endif
- return (0);
-}
-
-#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
-png_uint_32 PNGAPI
-png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
-{
- return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
- *.0254 +.5));
-}
-
-png_uint_32 PNGAPI
-png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
-{
- return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
- *.0254 +.5));
-}
-
-png_uint_32 PNGAPI
-png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
-{
- return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
- *.0254 +.5));
-}
-
-float PNGAPI
-png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
-{
- return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
- *.00003937);
-}
-
-float PNGAPI
-png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
-{
- return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
- *.00003937);
-}
-
-#ifdef PNG_pHYs_SUPPORTED
-png_uint_32 PNGAPI
-png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
-{
- png_uint_32 retval = 0;
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
- {
- png_debug1(1, "in %s retrieval function", "pHYs");
-
- if (res_x != NULL)
- {
- *res_x = info_ptr->x_pixels_per_unit;
- retval |= PNG_INFO_pHYs;
- }
- if (res_y != NULL)
- {
- *res_y = info_ptr->y_pixels_per_unit;
- retval |= PNG_INFO_pHYs;
- }
- if (unit_type != NULL)
- {
- *unit_type = (int)info_ptr->phys_unit_type;
- retval |= PNG_INFO_pHYs;
- if (*unit_type == 1)
- {
- if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
- if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
- }
- }
- }
- return (retval);
-}
-#endif /* PNG_pHYs_SUPPORTED */
-#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
-
-/* png_get_channels really belongs in here, too, but it's been around longer */
-
-#endif /* PNG_EASY_ACCESS_SUPPORTED */
-
-png_byte PNGAPI
-png_get_channels(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->channels);
- else
- return (0);
-}
-
-png_bytep PNGAPI
-png_get_signature(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr != NULL && info_ptr != NULL)
- return(info_ptr->signature);
- else
- return (NULL);
-}
-
-#ifdef PNG_bKGD_SUPPORTED
-png_uint_32 PNGAPI
-png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
- png_color_16p *background)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
- && background != NULL)
- {
- png_debug1(1, "in %s retrieval function", "bKGD");
-
- *background = &(info_ptr->background);
- return (PNG_INFO_bKGD);
- }
- return (0);
-}
-#endif
-
-#ifdef PNG_cHRM_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
- double *white_x, double *white_y, double *red_x, double *red_y,
- double *green_x, double *green_y, double *blue_x, double *blue_y)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
- {
- png_debug1(1, "in %s retrieval function", "cHRM");
-
- if (white_x != NULL)
- *white_x = (double)info_ptr->x_white;
- if (white_y != NULL)
- *white_y = (double)info_ptr->y_white;
- if (red_x != NULL)
- *red_x = (double)info_ptr->x_red;
- if (red_y != NULL)
- *red_y = (double)info_ptr->y_red;
- if (green_x != NULL)
- *green_x = (double)info_ptr->x_green;
- if (green_y != NULL)
- *green_y = (double)info_ptr->y_green;
- if (blue_x != NULL)
- *blue_x = (double)info_ptr->x_blue;
- if (blue_y != NULL)
- *blue_y = (double)info_ptr->y_blue;
- return (PNG_INFO_cHRM);
- }
- return (0);
-}
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
- png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
- png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
- png_fixed_point *blue_x, png_fixed_point *blue_y)
-{
- png_debug1(1, "in %s retrieval function", "cHRM");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
- {
- if (white_x != NULL)
- *white_x = info_ptr->int_x_white;
- if (white_y != NULL)
- *white_y = info_ptr->int_y_white;
- if (red_x != NULL)
- *red_x = info_ptr->int_x_red;
- if (red_y != NULL)
- *red_y = info_ptr->int_y_red;
- if (green_x != NULL)
- *green_x = info_ptr->int_x_green;
- if (green_y != NULL)
- *green_y = info_ptr->int_y_green;
- if (blue_x != NULL)
- *blue_x = info_ptr->int_x_blue;
- if (blue_y != NULL)
- *blue_y = info_ptr->int_y_blue;
- return (PNG_INFO_cHRM);
- }
- return (0);
-}
-#endif
-#endif
-
-#ifdef PNG_gAMA_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
-{
- png_debug1(1, "in %s retrieval function", "gAMA");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
- && file_gamma != NULL)
- {
- *file_gamma = (double)info_ptr->gamma;
- return (PNG_INFO_gAMA);
- }
- return (0);
-}
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
- png_fixed_point *int_file_gamma)
-{
- png_debug1(1, "in %s retrieval function", "gAMA");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
- && int_file_gamma != NULL)
- {
- *int_file_gamma = info_ptr->int_gamma;
- return (PNG_INFO_gAMA);
- }
- return (0);
-}
-#endif
-#endif
-
-#ifdef PNG_sRGB_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
-{
- png_debug1(1, "in %s retrieval function", "sRGB");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
- && file_srgb_intent != NULL)
- {
- *file_srgb_intent = (int)info_ptr->srgb_intent;
- return (PNG_INFO_sRGB);
- }
- return (0);
-}
-#endif
-
-#ifdef PNG_iCCP_SUPPORTED
-png_uint_32 PNGAPI
-png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
- png_charpp name, int *compression_type,
- png_charpp profile, png_uint_32 *proflen)
-{
- png_debug1(1, "in %s retrieval function", "iCCP");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
- && name != NULL && profile != NULL && proflen != NULL)
- {
- *name = info_ptr->iccp_name;
- *profile = info_ptr->iccp_profile;
- /* Compression_type is a dummy so the API won't have to change
- * if we introduce multiple compression types later.
- */
- *proflen = (int)info_ptr->iccp_proflen;
- *compression_type = (int)info_ptr->iccp_compression;
- return (PNG_INFO_iCCP);
- }
- return (0);
-}
-#endif
-
-#ifdef PNG_sPLT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
- png_sPLT_tpp spalettes)
-{
- if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
- {
- *spalettes = info_ptr->splt_palettes;
- return ((png_uint_32)info_ptr->splt_palettes_num);
- }
- return (0);
-}
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
-png_uint_32 PNGAPI
-png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
-{
- png_debug1(1, "in %s retrieval function", "hIST");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
- && hist != NULL)
- {
- *hist = info_ptr->hist;
- return (PNG_INFO_hIST);
- }
- return (0);
-}
-#endif
-
-png_uint_32 PNGAPI
-png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *width, png_uint_32 *height, int *bit_depth,
- int *color_type, int *interlace_type, int *compression_type,
- int *filter_type)
-
-{
- png_debug1(1, "in %s retrieval function", "IHDR");
-
- if (png_ptr == NULL || info_ptr == NULL || width == NULL ||
- height == NULL || bit_depth == NULL || color_type == NULL)
- return (0);
-
- *width = info_ptr->width;
- *height = info_ptr->height;
- *bit_depth = info_ptr->bit_depth;
- *color_type = info_ptr->color_type;
-
- if (compression_type != NULL)
- *compression_type = info_ptr->compression_type;
-
- if (filter_type != NULL)
- *filter_type = info_ptr->filter_type;
-
- if (interlace_type != NULL)
- *interlace_type = info_ptr->interlace_type;
-
- /* This is redundant if we can be sure that the info_ptr values were all
- * assigned in png_set_IHDR(). We do the check anyhow in case an
- * application has ignored our advice not to mess with the members
- * of info_ptr directly.
- */
- png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
- info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
- info_ptr->compression_type, info_ptr->filter_type);
-
- return (1);
-}
-
-#ifdef PNG_oFFs_SUPPORTED
-png_uint_32 PNGAPI
-png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
- png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
-{
- png_debug1(1, "in %s retrieval function", "oFFs");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
- && offset_x != NULL && offset_y != NULL && unit_type != NULL)
- {
- *offset_x = info_ptr->x_offset;
- *offset_y = info_ptr->y_offset;
- *unit_type = (int)info_ptr->offset_unit_type;
- return (PNG_INFO_oFFs);
- }
- return (0);
-}
-#endif
-
-#ifdef PNG_pCAL_SUPPORTED
-png_uint_32 PNGAPI
-png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
- png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
- png_charp *units, png_charpp *params)
-{
- png_debug1(1, "in %s retrieval function", "pCAL");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
- && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
- nparams != NULL && units != NULL && params != NULL)
- {
- *purpose = info_ptr->pcal_purpose;
- *X0 = info_ptr->pcal_X0;
- *X1 = info_ptr->pcal_X1;
- *type = (int)info_ptr->pcal_type;
- *nparams = (int)info_ptr->pcal_nparams;
- *units = info_ptr->pcal_units;
- *params = info_ptr->pcal_params;
- return (PNG_INFO_pCAL);
- }
- return (0);
-}
-#endif
-
-#ifdef PNG_sCAL_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
- int *unit, double *width, double *height)
-{
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_sCAL))
- {
- *unit = info_ptr->scal_unit;
- *width = info_ptr->scal_pixel_width;
- *height = info_ptr->scal_pixel_height;
- return (PNG_INFO_sCAL);
- }
- return(0);
-}
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
- int *unit, png_charpp width, png_charpp height)
-{
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_sCAL))
- {
- *unit = info_ptr->scal_unit;
- *width = info_ptr->scal_s_width;
- *height = info_ptr->scal_s_height;
- return (PNG_INFO_sCAL);
- }
- return(0);
-}
-#endif
-#endif
-#endif
-
-#ifdef PNG_pHYs_SUPPORTED
-png_uint_32 PNGAPI
-png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
-{
- png_uint_32 retval = 0;
-
- png_debug1(1, "in %s retrieval function", "pHYs");
-
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_pHYs))
- {
- if (res_x != NULL)
- {
- *res_x = info_ptr->x_pixels_per_unit;
- retval |= PNG_INFO_pHYs;
- }
-
- if (res_y != NULL)
- {
- *res_y = info_ptr->y_pixels_per_unit;
- retval |= PNG_INFO_pHYs;
- }
-
- if (unit_type != NULL)
- {
- *unit_type = (int)info_ptr->phys_unit_type;
- retval |= PNG_INFO_pHYs;
- }
- }
- return (retval);
-}
-#endif
-
-png_uint_32 PNGAPI
-png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
- int *num_palette)
-{
- png_debug1(1, "in %s retrieval function", "PLTE");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
- && palette != NULL)
- {
- *palette = info_ptr->palette;
- *num_palette = info_ptr->num_palette;
- png_debug1(3, "num_palette = %d", *num_palette);
- return (PNG_INFO_PLTE);
- }
- return (0);
-}
-
-#ifdef PNG_sBIT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
-{
- png_debug1(1, "in %s retrieval function", "sBIT");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
- && sig_bit != NULL)
- {
- *sig_bit = &(info_ptr->sig_bit);
- return (PNG_INFO_sBIT);
- }
- return (0);
-}
-#endif
-
-#ifdef PNG_TEXT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
- int *num_text)
-{
- if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
- {
- png_debug1(1, "in %s retrieval function",
- (png_ptr->chunk_name[0] == '\0' ? "text"
- : (png_const_charp)png_ptr->chunk_name));
-
- if (text_ptr != NULL)
- *text_ptr = info_ptr->text;
-
- if (num_text != NULL)
- *num_text = info_ptr->num_text;
-
- return ((png_uint_32)info_ptr->num_text);
- }
- if (num_text != NULL)
- *num_text = 0;
- return(0);
-}
-#endif
-
-#ifdef PNG_tIME_SUPPORTED
-png_uint_32 PNGAPI
-png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
-{
- png_debug1(1, "in %s retrieval function", "tIME");
-
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
- && mod_time != NULL)
- {
- *mod_time = &(info_ptr->mod_time);
- return (PNG_INFO_tIME);
- }
- return (0);
-}
-#endif
-
-#ifdef PNG_tRNS_SUPPORTED
-png_uint_32 PNGAPI
-png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
- png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
-{
- png_uint_32 retval = 0;
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
- {
- png_debug1(1, "in %s retrieval function", "tRNS");
-
- if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (trans_alpha != NULL)
- {
- *trans_alpha = info_ptr->trans_alpha;
- retval |= PNG_INFO_tRNS;
- }
-
- if (trans_color != NULL)
- *trans_color = &(info_ptr->trans_color);
- }
- else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
- {
- if (trans_color != NULL)
- {
- *trans_color = &(info_ptr->trans_color);
- retval |= PNG_INFO_tRNS;
- }
-
- if (trans_alpha != NULL)
- *trans_alpha = NULL;
- }
- if (num_trans != NULL)
- {
- *num_trans = info_ptr->num_trans;
- retval |= PNG_INFO_tRNS;
- }
- }
- return (retval);
-}
-#endif
-
-#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
-png_uint_32 PNGAPI
-png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
- png_unknown_chunkpp unknowns)
-{
- if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
- {
- *unknowns = info_ptr->unknown_chunks;
- return ((png_uint_32)info_ptr->unknown_chunks_num);
- }
- return (0);
-}
-#endif
-
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-png_byte PNGAPI
-png_get_rgb_to_gray_status (png_structp png_ptr)
-{
- return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
-}
-#endif
-
-#ifdef PNG_USER_CHUNKS_SUPPORTED
-png_voidp PNGAPI
-png_get_user_chunk_ptr(png_structp png_ptr)
-{
- return (png_ptr? png_ptr->user_chunk_ptr : NULL);
-}
-#endif
-
-#ifdef PNG_WRITE_SUPPORTED
-png_size_t PNGAPI
-png_get_compression_buffer_size(png_structp png_ptr)
-{
- return (png_ptr ? png_ptr->zbuf_size : 0L);
-}
-#endif
-
-
-#ifdef PNG_SET_USER_LIMITS_SUPPORTED
-/* These functions were added to libpng 1.2.6 */
-png_uint_32 PNGAPI
-png_get_user_width_max (png_structp png_ptr)
-{
- return (png_ptr? png_ptr->user_width_max : 0);
-}
-png_uint_32 PNGAPI
-png_get_user_height_max (png_structp png_ptr)
-{
- return (png_ptr? png_ptr->user_height_max : 0);
-}
-/* This function was added to libpng 1.4.0 */
-png_uint_32 PNGAPI
-png_get_chunk_cache_max (png_structp png_ptr)
-{
- return (png_ptr? png_ptr->user_chunk_cache_max? 0x7fffffffL :
- png_ptr->user_chunk_cache_max - 1 : 0);
-}
-#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
-
-#ifdef PNG_IO_STATE_SUPPORTED
-png_uint_32 PNGAPI
-png_get_io_state (png_structp png_ptr)
-{
- return png_ptr->io_state;
-}
-
-png_bytep PNGAPI
-png_get_io_chunk_name (png_structp png_ptr)
-{
- return png_ptr->chunk_name;
-}
-#endif /* ?PNG_IO_STATE_SUPPORTED */
-
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
Ecere Software / sdk / blobdiff