diff options
Diffstat (limited to 'libpng/pngget.c')
| -rw-r--r-- | libpng/pngget.c | 917 |
1 files changed, 917 insertions, 0 deletions
diff --git a/libpng/pngget.c b/libpng/pngget.c new file mode 100644 index 0000000..f180f3d --- /dev/null +++ b/libpng/pngget.c @@ -0,0 +1,917 @@ + +/* pngget.c - retrieval of values from info struct + * + * libpng 1.2.1 - December 12, 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 */ |