+++ /dev/null
-
-/* pngget.c - retrieval of values from info struct
- *
- * libpng 1.2.0 - September 1, 2001
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2001 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.)
- */
-
-#define PNG_INTERNAL
-#include "png.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_uint_32 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);
-}
-
-#if defined(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)
-#if defined(PNG_pHYs_SUPPORTED)
- if (info_ptr->valid & PNG_INFO_pHYs)
- {
- png_debug1(1, "in %s retrieval function\n", "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)
-#if defined(PNG_pHYs_SUPPORTED)
- if (info_ptr->valid & PNG_INFO_pHYs)
- {
- png_debug1(1, "in %s retrieval function\n", "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)
-#if defined(PNG_pHYs_SUPPORTED)
- if (info_ptr->valid & PNG_INFO_pHYs)
- {
- png_debug1(1, "in %s retrieval function\n", "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)
-#if defined(PNG_pHYs_SUPPORTED)
- if (info_ptr->valid & PNG_INFO_pHYs)
- {
- png_debug1(1, "in %s retrieval function\n", "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)
-#if defined(PNG_oFFs_SUPPORTED)
- if (info_ptr->valid & PNG_INFO_oFFs)
- {
- png_debug1(1, "in %s retrieval function\n", "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)
-#if defined(PNG_oFFs_SUPPORTED)
- if (info_ptr->valid & PNG_INFO_oFFs)
- {
- png_debug1(1, "in %s retrieval function\n", "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)
-#if defined(PNG_oFFs_SUPPORTED)
- if (info_ptr->valid & PNG_INFO_oFFs)
- {
- png_debug1(1, "in %s retrieval function\n", "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)
-#if defined(PNG_oFFs_SUPPORTED)
- if (info_ptr->valid & PNG_INFO_oFFs)
- {
- png_debug1(1, "in %s retrieval function\n", "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);
-}
-
-#if defined(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\n", "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);
-}
-
-#if defined(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\n", "bKGD");
- *background = &(info_ptr->background);
- return (PNG_INFO_bKGD);
- }
- return (0);
-}
-#endif
-
-#if defined(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\n", "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)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
- {
- png_debug1(1, "in %s retrieval function\n", "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
-
-#if defined(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)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
- && file_gamma != NULL)
- {
- png_debug1(1, "in %s retrieval function\n", "gAMA");
- *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)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
- && int_file_gamma != NULL)
- {
- png_debug1(1, "in %s retrieval function\n", "gAMA");
- *int_file_gamma = info_ptr->int_gamma;
- return (PNG_INFO_gAMA);
- }
- return (0);
-}
-#endif
-#endif
-
-#if defined(PNG_sRGB_SUPPORTED)
-png_uint_32 PNGAPI
-png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
- && file_srgb_intent != NULL)
- {
- png_debug1(1, "in %s retrieval function\n", "sRGB");
- *file_srgb_intent = (int)info_ptr->srgb_intent;
- return (PNG_INFO_sRGB);
- }
- return (0);
-}
-#endif
-
-#if defined(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)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
- && name != NULL && profile != NULL && proflen != NULL)
- {
- png_debug1(1, "in %s retrieval function\n", "iCCP");
- *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
-
-#if defined(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);
-}
-#endif
-
-#if defined(PNG_hIST_SUPPORTED)
-png_uint_32 PNGAPI
-png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
- && hist != NULL)
- {
- png_debug1(1, "in %s retrieval function\n", "hIST");
- *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)
-
-{
- if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
- bit_depth != NULL && color_type != NULL)
- {
- int pixel_depth, channels;
- png_uint_32 rowbytes_per_pixel;
-
- png_debug1(1, "in %s retrieval function\n", "IHDR");
- *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;
-
- /* check for potential overflow of rowbytes */
- if (*color_type == PNG_COLOR_TYPE_PALETTE)
- channels = 1;
- else if (*color_type & PNG_COLOR_MASK_COLOR)
- channels = 3;
- else
- channels = 1;
- if (*color_type & PNG_COLOR_MASK_ALPHA)
- channels++;
- pixel_depth = *bit_depth * channels;
- rowbytes_per_pixel = (pixel_depth + 7) >> 3;
- if ((*width > PNG_MAX_UINT/rowbytes_per_pixel))
- {
- png_warning(png_ptr,
- "Width too large for libpng to process image data.");
- }
- return (1);
- }
- return (0);
-}
-
-#if defined(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)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
- && offset_x != NULL && offset_y != NULL && unit_type != NULL)
- {
- png_debug1(1, "in %s retrieval function\n", "oFFs");
- *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
-
-#if defined(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)
-{
- 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)
- {
- png_debug1(1, "in %s retrieval function\n", "pCAL");
- *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
-
-#if defined(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
-
-#if defined(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;
-
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_pHYs))
- {
- png_debug1(1, "in %s retrieval function\n", "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)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
- && palette != NULL)
- {
- png_debug1(1, "in %s retrieval function\n", "PLTE");
- *palette = info_ptr->palette;
- *num_palette = info_ptr->num_palette;
- png_debug1(3, "num_palette = %d\n", *num_palette);
- return (PNG_INFO_PLTE);
- }
- return (0);
-}
-
-#if defined(PNG_sBIT_SUPPORTED)
-png_uint_32 PNGAPI
-png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
- && sig_bit != NULL)
- {
- png_debug1(1, "in %s retrieval function\n", "sBIT");
- *sig_bit = &(info_ptr->sig_bit);
- return (PNG_INFO_sBIT);
- }
- return (0);
-}
-#endif
-
-#if defined(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\n",
- (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
-
-#if defined(PNG_tIME_SUPPORTED)
-png_uint_32 PNGAPI
-png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
-{
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
- && mod_time != NULL)
- {
- png_debug1(1, "in %s retrieval function\n", "tIME");
- *mod_time = &(info_ptr->mod_time);
- return (PNG_INFO_tIME);
- }
- return (0);
-}
-#endif
-
-#if defined(PNG_tRNS_SUPPORTED)
-png_uint_32 PNGAPI
-png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
- png_bytep *trans, int *num_trans, png_color_16p *trans_values)
-{
- 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\n", "tRNS");
- if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- if (trans != NULL)
- {
- *trans = info_ptr->trans;
- retval |= PNG_INFO_tRNS;
- }
- if (trans_values != NULL)
- *trans_values = &(info_ptr->trans_values);
- }
- else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
- {
- if (trans_values != NULL)
- {
- *trans_values = &(info_ptr->trans_values);
- retval |= PNG_INFO_tRNS;
- }
- if(trans != NULL)
- *trans = NULL;
- }
- if(num_trans != NULL)
- {
- *num_trans = info_ptr->num_trans;
- retval |= PNG_INFO_tRNS;
- }
- }
- return (retval);
-}
-#endif
-
-#if defined(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);
-}
-#endif
-
-#if defined(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
-
-#if defined(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
-
-
-png_uint_32 PNGAPI
-png_get_compression_buffer_size(png_structp png_ptr)
-{
- return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
-}
-
-
-#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
-/* this function was added to libpng 1.2.0 and should exist by default*/
-png_uint_32 PNGAPI
-png_get_asm_flags (png_structp png_ptr)
-{
- return (png_uint_32)(png_ptr? png_ptr->asm_flags : 0L);
-}
-
-/* this function was added to libpng 1.2.0 and should exist by default */
-png_uint_32 PNGAPI
-png_get_asm_flagmask (int flag_select)
-{
- png_uint_32 settable_asm_flags = 0;
-
- if (flag_select & PNG_SELECT_READ)
- settable_asm_flags |=
- PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
- PNG_ASM_FLAG_MMX_READ_INTERLACE |
- PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
- PNG_ASM_FLAG_MMX_READ_FILTER_UP |
- PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
- PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
- /* no non-MMX flags yet */
-
-#if 0
- /* GRR: no write-flags yet, either, but someday... */
- if (flag_select & PNG_SELECT_WRITE)
- settable_asm_flags |=
- PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
-#endif /* 0 */
-
- return settable_asm_flags; /* _theoretically_ settable capabilities only */
-}
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
-
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
- /* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
-/* this function was added to libpng 1.2.0 */
-png_uint_32 PNGAPI
-png_get_mmx_flagmask (int flag_select, int *compilerID)
-{
- png_uint_32 settable_mmx_flags = 0;
-
- if (flag_select & PNG_SELECT_READ)
- settable_mmx_flags |=
- PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
- PNG_ASM_FLAG_MMX_READ_INTERLACE |
- PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
- PNG_ASM_FLAG_MMX_READ_FILTER_UP |
- PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
- PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
-#if 0
- /* GRR: no MMX write support yet, but someday... */
- if (flag_select & PNG_SELECT_WRITE)
- settable_mmx_flags |=
- PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
-#endif /* 0 */
-
- if (compilerID != NULL) {
-#ifdef PNG_USE_PNGVCRD
- *compilerID = 1; /* MSVC */
-#else
-#ifdef PNG_USE_PNGGCCRD
- *compilerID = 2; /* gcc/gas */
-#else
- *compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
-#endif
-#endif
- }
-
- return settable_mmx_flags; /* _theoretically_ settable capabilities only */
-}
-
-/* this function was added to libpng 1.2.0 */
-png_byte PNGAPI
-png_get_mmx_bitdepth_threshold (png_structp png_ptr)
-{
- return (png_byte)(png_ptr? png_ptr->mmx_bitdepth_threshold : 0);
-}
-
-/* this function was added to libpng 1.2.0 */
-png_uint_32 PNGAPI
-png_get_mmx_rowbytes_threshold (png_structp png_ptr)
-{
- return (png_uint_32)(png_ptr? png_ptr->mmx_rowbytes_threshold : 0L);
-}
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
projects / rrdtool.git / blobdiff