/* pngget.c - retrieval of values from info struct
*
* Copyright ( c ) 2018 - 2025 Cosmin Truta
* Copyright ( c ) 1998 - 2002 , 2004 , 2006 - 2018 Glenn Randers - Pehrson
* Copyright ( c ) 1996 - 1997 Andreas Dilger
* 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
*
*/
#include "pngpriv.h"
#if defined (PNG_READ_SUPPORTED) || defined (PNG_WRITE_SUPPORTED)
png_uint_32 PNGAPI
png_get_valid(png_const_structrp png_ptr, png_const_inforp info_ptr,
png_uint_32 flag)
{
if (png_ptr != NULL && info_ptr != NULL)
{
#ifdef PNG_READ_tRNS_SUPPORTED
/* png_handle_PLTE() may have canceled a valid tRNS chunk but left the
* ' valid ' flag for the detection of duplicate chunks . Do not report a
* valid tRNS chunk in this case .
*/
if (flag == PNG_INFO_tRNS && png_ptr->num_trans == 0 )
return 0 ;
#endif
return info_ptr->valid & flag;
}
return 0 ;
}
size_t PNGAPI
png_get_rowbytes(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->rowbytes;
return 0 ;
}
#ifdef PNG_INFO_IMAGE_SUPPORTED
png_bytepp PNGAPI
png_get_rows(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->row_pointers;
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_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->width;
return 0 ;
}
png_uint_32 PNGAPI
png_get_image_height(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->height;
return 0 ;
}
png_byte PNGAPI
png_get_bit_depth(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->bit_depth;
return 0 ;
}
png_byte PNGAPI
png_get_color_type(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->color_type;
return 0 ;
}
png_byte PNGAPI
png_get_filter_type(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->filter_type;
return 0 ;
}
png_byte PNGAPI
png_get_interlace_type(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->interlace_type;
return 0 ;
}
png_byte PNGAPI
png_get_compression_type(png_const_structrp png_ptr, png_const_inforp 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_const_structrp png_ptr,
png_const_inforp info_ptr)
{
#ifdef PNG_pHYs_SUPPORTED
png_debug(1 , "in png_get_x_pixels_per_meter" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_pHYs) != 0 )
{
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
return info_ptr->x_pixels_per_unit;
}
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif
return 0 ;
}
png_uint_32 PNGAPI
png_get_y_pixels_per_meter(png_const_structrp png_ptr,
png_const_inforp info_ptr)
{
#ifdef PNG_pHYs_SUPPORTED
png_debug(1 , "in png_get_y_pixels_per_meter" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_pHYs) != 0 )
{
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
return info_ptr->y_pixels_per_unit;
}
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif
return 0 ;
}
png_uint_32 PNGAPI
png_get_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
#ifdef PNG_pHYs_SUPPORTED
png_debug(1 , "in png_get_pixels_per_meter" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_pHYs) != 0 )
{
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER &&
info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
return info_ptr->x_pixels_per_unit;
}
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif
return 0 ;
}
#ifdef PNG_FLOATING_POINT_SUPPORTED
float PNGAPI
png_get_pixel_aspect_ratio(png_const_structrp png_ptr,
png_const_inforp info_ptr)
{
#ifdef PNG_READ_pHYs_SUPPORTED
png_debug(1 , "in png_get_pixel_aspect_ratio" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_pHYs) != 0 )
{
if (info_ptr->x_pixels_per_unit != 0 )
return (float )info_ptr->y_pixels_per_unit
/ (float )info_ptr->x_pixels_per_unit;
}
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif
return (float )0 .0 ;
}
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
png_fixed_point PNGAPI
png_get_pixel_aspect_ratio_fixed(png_const_structrp png_ptr,
png_const_inforp info_ptr)
{
#ifdef PNG_READ_pHYs_SUPPORTED
png_debug(1 , "in png_get_pixel_aspect_ratio_fixed" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_pHYs) != 0 &&
info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0 &&
info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX &&
info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX)
{
png_fixed_point res;
/* The following casts work because a PNG 4 byte integer only has a valid
* range of 0 . . 2 ^ 31 - 1 ; otherwise the cast might overflow .
*/
if (png_muldiv(&res, (png_int_32)info_ptr->y_pixels_per_unit, PNG_FP_1,
(png_int_32)info_ptr->x_pixels_per_unit) != 0 )
return res;
}
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif
return 0 ;
}
#endif
png_int_32 PNGAPI
png_get_x_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
#ifdef PNG_oFFs_SUPPORTED
png_debug(1 , "in png_get_x_offset_microns" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_oFFs) != 0 )
{
if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
return info_ptr->x_offset;
}
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif
return 0 ;
}
png_int_32 PNGAPI
png_get_y_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
#ifdef PNG_oFFs_SUPPORTED
png_debug(1 , "in png_get_y_offset_microns" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_oFFs) != 0 )
{
if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
return info_ptr->y_offset;
}
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif
return 0 ;
}
png_int_32 PNGAPI
png_get_x_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
#ifdef PNG_oFFs_SUPPORTED
png_debug(1 , "in png_get_x_offset_pixels" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_oFFs) != 0 )
{
if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
return info_ptr->x_offset;
}
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif
return 0 ;
}
png_int_32 PNGAPI
png_get_y_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
#ifdef PNG_oFFs_SUPPORTED
png_debug(1 , "in png_get_y_offset_pixels" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_oFFs) != 0 )
{
if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
return info_ptr->y_offset;
}
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif
return 0 ;
}
#ifdef PNG_INCH_CONVERSIONS_SUPPORTED
static png_uint_32
ppi_from_ppm(png_uint_32 ppm)
{
#if 0
/* The conversion is *(2.54/100), in binary (32 digits):
* . 00000110100000001001110101001001
*/
png_uint_32 t1001, t1101;
ppm >>= 1 ; /* .1 */
t1001 = ppm + (ppm >> 3 ); /* .1001 */
t1101 = t1001 + (ppm >> 1 ); /* .1101 */
ppm >>= 20 ; /* .000000000000000000001 */
t1101 += t1101 >> 15 ; /* .1101000000000001101 */
t1001 >>= 11 ; /* .000000000001001 */
t1001 += t1001 >> 12 ; /* .000000000001001000000001001 */
ppm += t1001; /* .000000000001001000001001001 */
ppm += t1101; /* .110100000001001110101001001 */
return (ppm + 16 ) >> 5 ;/* .00000110100000001001110101001001 */
#else
/* The argument is a PNG unsigned integer, so it is not permitted
* to be bigger than 2 ^ 31 .
*/
png_fixed_point result;
if (ppm <= PNG_UINT_31_MAX && png_muldiv(&result, (png_int_32)ppm, 127 ,
5000 ) != 0 )
return (png_uint_32)result;
/* Overflow. */
return 0 ;
#endif
}
png_uint_32 PNGAPI
png_get_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr));
}
png_uint_32 PNGAPI
png_get_x_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr));
}
png_uint_32 PNGAPI
png_get_y_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr));
}
#ifdef PNG_FIXED_POINT_SUPPORTED
static png_fixed_point
png_fixed_inches_from_microns(png_const_structrp png_ptr, png_int_32 microns)
{
/* Convert from meters * 1,000,000 to inches * 100,000, meters to
* inches is simply * ( 100 / 2 . 54 ) , so we want * ( 10 / 2 . 54 ) = = 500 / 127 .
* Notice that this can overflow - a warning is output and 0 is
* returned .
*/
png_fixed_point result;
if (png_muldiv(&result, microns, 500 , 127 ) != 0 )
return result;
png_warning(png_ptr, "fixed point overflow ignored" );
return 0 ;
}
png_fixed_point PNGAPI
png_get_x_offset_inches_fixed(png_const_structrp png_ptr,
png_const_inforp info_ptr)
{
return png_fixed_inches_from_microns(png_ptr,
png_get_x_offset_microns(png_ptr, info_ptr));
}
#endif /* FIXED_POINT */
#ifdef PNG_FIXED_POINT_SUPPORTED
png_fixed_point PNGAPI
png_get_y_offset_inches_fixed(png_const_structrp png_ptr,
png_const_inforp info_ptr)
{
return png_fixed_inches_from_microns(png_ptr,
png_get_y_offset_microns(png_ptr, info_ptr));
}
#endif
#ifdef PNG_FLOATING_POINT_SUPPORTED
float PNGAPI
png_get_x_offset_inches(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
/* To avoid the overflow do the conversion directly in floating
* point .
*/
return (float )(png_get_x_offset_microns(png_ptr, info_ptr) * .00003937 );
}
#endif
#ifdef PNG_FLOATING_POINT_SUPPORTED
float PNGAPI
png_get_y_offset_inches(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
/* To avoid the overflow do the conversion directly in floating
* point .
*/
return (float )(png_get_y_offset_microns(png_ptr, info_ptr) * .00003937 );
}
#endif
#ifdef PNG_pHYs_SUPPORTED
png_uint_32 PNGAPI
png_get_pHYs_dpi(png_const_structrp png_ptr, png_const_inforp 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) != 0 )
{
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 /* pHYs */
#endif /* INCH_CONVERSIONS */
/* png_get_channels really belongs in here, too, but it's been around longer */
#endif /* EASY_ACCESS */
png_byte PNGAPI
png_get_channels(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->channels;
return 0 ;
}
#ifdef PNG_READ_SUPPORTED
png_const_bytep PNGAPI
png_get_signature(png_const_structrp png_ptr, png_const_inforp info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->signature;
return NULL;
}
#endif
#ifdef PNG_bKGD_SUPPORTED
png_uint_32 PNGAPI
png_get_bKGD(png_const_structrp png_ptr, png_inforp info_ptr,
png_color_16p *background)
{
png_debug1(1 , "in %s retrieval function" , "bKGD" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_bKGD) != 0 &&
background != NULL)
{
*background = &(info_ptr->background);
return PNG_INFO_bKGD;
}
return 0 ;
}
#endif
#ifdef PNG_cHRM_SUPPORTED
/* The XYZ APIs were added in 1.5.5 to take advantage of the code added at the
* same time to correct the rgb grayscale coefficient defaults obtained from the
* cHRM chunk in 1 . 5 . 4
*/
# ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_cHRM(png_const_structrp png_ptr, png_const_inforp info_ptr,
double *whitex, double *whitey, double *redx, double *redy,
double *greenx, double *greeny, double *bluex, double *bluey)
{
png_debug1(1 , "in %s retrieval function" , "cHRM" );
/* PNGv3: this just returns the values store from the cHRM, if any. */
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_cHRM) != 0 )
{
if (whitex != NULL)
*whitex = png_float(png_ptr, info_ptr->cHRM.whitex, "cHRM wx" );
if (whitey != NULL)
*whitey = png_float(png_ptr, info_ptr->cHRM.whitey, "cHRM wy" );
if (redx != NULL)
*redx = png_float(png_ptr, info_ptr->cHRM.redx, "cHRM rx" );
if (redy != NULL)
*redy = png_float(png_ptr, info_ptr->cHRM.redy, "cHRM ry" );
if (greenx != NULL)
*greenx = png_float(png_ptr, info_ptr->cHRM.greenx, "cHRM gx" );
if (greeny != NULL)
*greeny = png_float(png_ptr, info_ptr->cHRM.greeny, "cHRM gy" );
if (bluex != NULL)
*bluex = png_float(png_ptr, info_ptr->cHRM.bluex, "cHRM bx" );
if (bluey != NULL)
*bluey = png_float(png_ptr, info_ptr->cHRM.bluey, "cHRM by" );
return PNG_INFO_cHRM;
}
return 0 ;
}
png_uint_32 PNGAPI
png_get_cHRM_XYZ(png_const_structrp png_ptr, png_const_inforp info_ptr,
double *red_X, double *red_Y, double *red_Z, double *green_X,
double *green_Y, double *green_Z, double *blue_X, double *blue_Y,
double *blue_Z)
{
png_XYZ XYZ;
png_debug1(1 , "in %s retrieval function" , "cHRM_XYZ(float)" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_cHRM) != 0 &&
png_XYZ_from_xy(&XYZ, &info_ptr->cHRM) == 0 )
{
if (red_X != NULL)
*red_X = png_float(png_ptr, XYZ.red_X, "cHRM red X" );
if (red_Y != NULL)
*red_Y = png_float(png_ptr, XYZ.red_Y, "cHRM red Y" );
if (red_Z != NULL)
*red_Z = png_float(png_ptr, XYZ.red_Z, "cHRM red Z" );
if (green_X != NULL)
*green_X = png_float(png_ptr, XYZ.green_X, "cHRM green X" );
if (green_Y != NULL)
*green_Y = png_float(png_ptr, XYZ.green_Y, "cHRM green Y" );
if (green_Z != NULL)
*green_Z = png_float(png_ptr, XYZ.green_Z, "cHRM green Z" );
if (blue_X != NULL)
*blue_X = png_float(png_ptr, XYZ.blue_X, "cHRM blue X" );
if (blue_Y != NULL)
*blue_Y = png_float(png_ptr, XYZ.blue_Y, "cHRM blue Y" );
if (blue_Z != NULL)
*blue_Z = png_float(png_ptr, XYZ.blue_Z, "cHRM blue Z" );
return PNG_INFO_cHRM;
}
return 0 ;
}
# endif
# ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
png_fixed_point *int_red_X, png_fixed_point *int_red_Y,
png_fixed_point *int_red_Z, png_fixed_point *int_green_X,
png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,
png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
png_fixed_point *int_blue_Z)
{
png_XYZ XYZ;
png_debug1(1 , "in %s retrieval function" , "cHRM_XYZ" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_cHRM) != 0 U &&
png_XYZ_from_xy(&XYZ, &info_ptr->cHRM) == 0 )
{
if (int_red_X != NULL) *int_red_X = XYZ.red_X;
if (int_red_Y != NULL) *int_red_Y = XYZ.red_Y;
if (int_red_Z != NULL) *int_red_Z = XYZ.red_Z;
if (int_green_X != NULL) *int_green_X = XYZ.green_X;
if (int_green_Y != NULL) *int_green_Y = XYZ.green_Y;
if (int_green_Z != NULL) *int_green_Z = XYZ.green_Z;
if (int_blue_X != NULL) *int_blue_X = XYZ.blue_X;
if (int_blue_Y != NULL) *int_blue_Y = XYZ.blue_Y;
if (int_blue_Z != NULL) *int_blue_Z = XYZ.blue_Z;
return PNG_INFO_cHRM;
}
return 0 ;
}
png_uint_32 PNGAPI
png_get_cHRM_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
png_fixed_point *whitex, png_fixed_point *whitey, png_fixed_point *redx,
png_fixed_point *redy, png_fixed_point *greenx, png_fixed_point *greeny,
png_fixed_point *bluex, png_fixed_point *bluey)
{
png_debug1(1 , "in %s retrieval function" , "cHRM" );
/* PNGv3: this just returns the values store from the cHRM, if any. */
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_cHRM) != 0 )
{
if (whitex != NULL) *whitex = info_ptr->cHRM.whitex;
if (whitey != NULL) *whitey = info_ptr->cHRM.whitey;
if (redx != NULL) *redx = info_ptr->cHRM.redx;
if (redy != NULL) *redy = info_ptr->cHRM.redy;
if (greenx != NULL) *greenx = info_ptr->cHRM.greenx;
if (greeny != NULL) *greeny = info_ptr->cHRM.greeny;
if (bluex != NULL) *bluex = info_ptr->cHRM.bluex;
if (bluey != NULL) *bluey = info_ptr->cHRM.bluey;
return PNG_INFO_cHRM;
}
return 0 ;
}
# endif
#endif
#ifdef PNG_gAMA_SUPPORTED
# ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_gAMA_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
png_fixed_point *file_gamma)
{
png_debug1(1 , "in %s retrieval function" , "gAMA" );
/* PNGv3 compatibility: only report gAMA if it is really present. */
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_gAMA) != 0 )
{
if (file_gamma != NULL) *file_gamma = info_ptr->gamma;
return PNG_INFO_gAMA;
}
return 0 ;
}
# endif
# ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_gAMA(png_const_structrp png_ptr, png_const_inforp info_ptr,
double *file_gamma)
{
png_debug1(1 , "in %s retrieval function" , "gAMA(float)" );
/* PNGv3 compatibility: only report gAMA if it is really present. */
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_gAMA) != 0 )
{
if (file_gamma != NULL)
*file_gamma = png_float(png_ptr, info_ptr->gamma, "gAMA" );
return PNG_INFO_gAMA;
}
return 0 ;
}
# endif
#endif
#ifdef PNG_sRGB_SUPPORTED
png_uint_32 PNGAPI
png_get_sRGB(png_const_structrp png_ptr, png_const_inforp 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) != 0 )
{
if (file_srgb_intent != NULL)
*file_srgb_intent = info_ptr->rendering_intent;
return PNG_INFO_sRGB;
}
return 0 ;
}
#endif
#ifdef PNG_iCCP_SUPPORTED
png_uint_32 PNGAPI
png_get_iCCP(png_const_structrp png_ptr, png_inforp info_ptr,
png_charpp name, int *compression_type,
png_bytepp 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) != 0 &&
name != NULL && profile != NULL && proflen != NULL)
{
*name = info_ptr->iccp_name;
*profile = info_ptr->iccp_profile;
*proflen = png_get_uint_32(info_ptr->iccp_profile);
/* This is somewhat irrelevant since the profile data returned has
* actually been uncompressed .
*/
if (compression_type != NULL)
*compression_type = PNG_COMPRESSION_TYPE_BASE;
return PNG_INFO_iCCP;
}
return 0 ;
}
#endif
#ifdef PNG_sPLT_SUPPORTED
int PNGAPI
png_get_sPLT(png_const_structrp png_ptr, png_inforp info_ptr,
png_sPLT_tpp spalettes)
{
png_debug1(1 , "in %s retrieval function" , "sPLT" );
if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
{
*spalettes = info_ptr->splt_palettes;
return info_ptr->splt_palettes_num;
}
return 0 ;
}
#endif
#ifdef PNG_cICP_SUPPORTED
png_uint_32 PNGAPI
png_get_cICP(png_const_structrp png_ptr,
png_const_inforp info_ptr, png_bytep colour_primaries,
png_bytep transfer_function, png_bytep matrix_coefficients,
png_bytep video_full_range_flag)
{
png_debug1(1 , "in %s retrieval function" , "cICP" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_cICP) != 0 &&
colour_primaries != NULL && transfer_function != NULL &&
matrix_coefficients != NULL && video_full_range_flag != NULL)
{
*colour_primaries = info_ptr->cicp_colour_primaries;
*transfer_function = info_ptr->cicp_transfer_function;
*matrix_coefficients = info_ptr->cicp_matrix_coefficients;
*video_full_range_flag = info_ptr->cicp_video_full_range_flag;
return (PNG_INFO_cICP);
}
return 0 ;
}
#endif
#ifdef PNG_cLLI_SUPPORTED
# ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_cLLI_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
png_uint_32p maxCLL,
png_uint_32p maxFALL)
{
png_debug1(1 , "in %s retrieval function" , "cLLI" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_cLLI) != 0 )
{
if (maxCLL != NULL) *maxCLL = info_ptr->maxCLL;
if (maxFALL != NULL) *maxFALL = info_ptr->maxFALL;
return PNG_INFO_cLLI;
}
return 0 ;
}
# endif
# ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_cLLI(png_const_structrp png_ptr, png_const_inforp info_ptr,
double *maxCLL, double *maxFALL)
{
png_debug1(1 , "in %s retrieval function" , "cLLI(float)" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_cLLI) != 0 )
{
if (maxCLL != NULL) *maxCLL = info_ptr->maxCLL * .0001 ;
if (maxFALL != NULL) *maxFALL = info_ptr->maxFALL * .0001 ;
return PNG_INFO_cLLI;
}
return 0 ;
}
# endif
#endif /* cLLI */
#ifdef PNG_mDCV_SUPPORTED
# ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_mDCV_fixed(png_const_structrp png_ptr, png_const_inforp 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_uint_32p mastering_maxDL, png_uint_32p mastering_minDL)
{
png_debug1(1 , "in %s retrieval function" , "mDCV" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_mDCV) != 0 )
{
if (white_x != NULL) *white_x = info_ptr->mastering_white_x * 2 ;
if (white_y != NULL) *white_y = info_ptr->mastering_white_y * 2 ;
if (red_x != NULL) *red_x = info_ptr->mastering_red_x * 2 ;
if (red_y != NULL) *red_y = info_ptr->mastering_red_y * 2 ;
if (green_x != NULL) *green_x = info_ptr->mastering_green_x * 2 ;
if (green_y != NULL) *green_y = info_ptr->mastering_green_y * 2 ;
if (blue_x != NULL) *blue_x = info_ptr->mastering_blue_x * 2 ;
if (blue_y != NULL) *blue_y = info_ptr->mastering_blue_y * 2 ;
if (mastering_maxDL != NULL) *mastering_maxDL = info_ptr->mastering_maxDL;
if (mastering_minDL != NULL) *mastering_minDL = info_ptr->mastering_minDL;
return PNG_INFO_mDCV;
}
return 0 ;
}
# endif
# ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_mDCV(png_const_structrp png_ptr, png_const_inforp 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,
double *mastering_maxDL, double *mastering_minDL)
{
png_debug1(1 , "in %s retrieval function" , "mDCV(float)" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_mDCV) != 0 )
{
if (white_x != NULL) *white_x = info_ptr->mastering_white_x * .00002 ;
if (white_y != NULL) *white_y = info_ptr->mastering_white_y * .00002 ;
if (red_x != NULL) *red_x = info_ptr->mastering_red_x * .00002 ;
if (red_y != NULL) *red_y = info_ptr->mastering_red_y * .00002 ;
if (green_x != NULL) *green_x = info_ptr->mastering_green_x * .00002 ;
if (green_y != NULL) *green_y = info_ptr->mastering_green_y * .00002 ;
if (blue_x != NULL) *blue_x = info_ptr->mastering_blue_x * .00002 ;
if (blue_y != NULL) *blue_y = info_ptr->mastering_blue_y * .00002 ;
if (mastering_maxDL != NULL)
*mastering_maxDL = info_ptr->mastering_maxDL * .0001 ;
if (mastering_minDL != NULL)
*mastering_minDL = info_ptr->mastering_minDL * .0001 ;
return PNG_INFO_mDCV;
}
return 0 ;
}
# endif /* FLOATING_POINT */
#endif /* mDCV */
#ifdef PNG_eXIf_SUPPORTED
png_uint_32 PNGAPI
png_get_eXIf(png_const_structrp png_ptr, png_inforp info_ptr,
png_bytep *exif)
{
png_warning(png_ptr, "png_get_eXIf does not work; use png_get_eXIf_1" );
PNG_UNUSED(info_ptr)
PNG_UNUSED(exif)
return 0 ;
}
png_uint_32 PNGAPI
png_get_eXIf_1(png_const_structrp png_ptr, png_const_inforp info_ptr,
png_uint_32 *num_exif, png_bytep *exif)
{
png_debug1(1 , "in %s retrieval function" , "eXIf" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_eXIf) != 0 && exif != NULL)
{
*num_exif = info_ptr->num_exif;
*exif = info_ptr->exif;
return PNG_INFO_eXIf;
}
return 0 ;
}
#endif
#ifdef PNG_hIST_SUPPORTED
png_uint_32 PNGAPI
png_get_hIST(png_const_structrp png_ptr, png_inforp 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) != 0 && hist != NULL)
{
*hist = info_ptr->hist;
return PNG_INFO_hIST;
}
return 0 ;
}
#endif
png_uint_32 PNGAPI
png_get_IHDR(png_const_structrp png_ptr, png_const_inforp 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)
return 0 ;
if (width != NULL)
*width = info_ptr->width;
if (height != NULL)
*height = info_ptr->height;
if (bit_depth != NULL)
*bit_depth = info_ptr->bit_depth;
if (color_type != NULL)
*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_const_structrp png_ptr, png_const_inforp 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) != 0 &&
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_const_structrp png_ptr, png_inforp 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) != 0 &&
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_FIXED_POINT_SUPPORTED
# if defined (PNG_FLOATING_ARITHMETIC_SUPPORTED) || \
defined (PNG_FLOATING_POINT_SUPPORTED)
png_uint_32 PNGAPI
png_get_sCAL_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
int *unit, png_fixed_point *width, png_fixed_point *height)
{
png_debug1(1 , "in %s retrieval function" , "sCAL" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_sCAL) != 0 )
{
*unit = info_ptr->scal_unit;
/*TODO: make this work without FP support; the API is currently eliminated
* if neither floating point APIs nor internal floating point arithmetic
* are enabled .
*/
*width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width" );
*height = png_fixed(png_ptr, atof(info_ptr->scal_s_height),
"sCAL height" );
return PNG_INFO_sCAL;
}
return 0 ;
}
# endif /* FLOATING_ARITHMETIC */
# endif /* FIXED_POINT */
# ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_sCAL(png_const_structrp png_ptr, png_const_inforp info_ptr,
int *unit, double *width, double *height)
{
png_debug1(1 , "in %s retrieval function" , "sCAL(float)" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_sCAL) != 0 )
{
*unit = info_ptr->scal_unit;
*width = atof(info_ptr->scal_s_width);
*height = atof(info_ptr->scal_s_height);
return PNG_INFO_sCAL;
}
return 0 ;
}
# endif /* FLOATING POINT */
png_uint_32 PNGAPI
png_get_sCAL_s(png_const_structrp png_ptr, png_const_inforp info_ptr,
int *unit, png_charpp width, png_charpp height)
{
png_debug1(1 , "in %s retrieval function" , "sCAL(str)" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_sCAL) != 0 )
{
*unit = info_ptr->scal_unit;
*width = info_ptr->scal_s_width;
*height = info_ptr->scal_s_height;
return PNG_INFO_sCAL;
}
return 0 ;
}
#endif /* sCAL */
#ifdef PNG_pHYs_SUPPORTED
png_uint_32 PNGAPI
png_get_pHYs(png_const_structrp png_ptr, png_const_inforp 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) != 0 )
{
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 /* pHYs */
png_uint_32 PNGAPI
png_get_PLTE(png_const_structrp png_ptr, png_inforp 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) != 0 && 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_const_structrp png_ptr, png_inforp 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) != 0 && sig_bit != NULL)
{
*sig_bit = &(info_ptr->sig_bit);
return PNG_INFO_sBIT;
}
return 0 ;
}
#endif
#ifdef PNG_TEXT_SUPPORTED
int PNGAPI
png_get_text(png_const_structrp png_ptr, png_inforp 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 text retrieval function, chunk typeid = 0x%lx" ,
(unsigned long )png_ptr->chunk_name);
if (text_ptr != NULL)
*text_ptr = info_ptr->text;
if (num_text != NULL)
*num_text = info_ptr->num_text;
return 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_const_structrp png_ptr, png_inforp 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) != 0 && 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_const_structrp png_ptr, png_inforp info_ptr,
png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
{
png_uint_32 retval = 0 ;
png_debug1(1 , "in %s retrieval function" , "tRNS" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_tRNS) != 0 )
{
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_STORE_UNKNOWN_CHUNKS_SUPPORTED
int PNGAPI
png_get_unknown_chunks(png_const_structrp png_ptr, png_inforp info_ptr,
png_unknown_chunkpp unknowns)
{
if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
{
*unknowns = info_ptr->unknown_chunks;
return 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_const_structrp 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_const_structrp png_ptr)
{
return (png_ptr ? png_ptr->user_chunk_ptr : NULL);
}
#endif
size_t PNGAPI
png_get_compression_buffer_size(png_const_structrp png_ptr)
{
if (png_ptr == NULL)
return 0 ;
#ifdef PNG_WRITE_SUPPORTED
if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 )
#endif
{
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
return png_ptr->IDAT_read_size;
#else
return PNG_IDAT_READ_SIZE;
#endif
}
#ifdef PNG_WRITE_SUPPORTED
else
return png_ptr->zbuffer_size;
#endif
}
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
/* These functions were added to libpng 1.2.6 and were enabled
* by default in libpng-1.4.0 */
png_uint_32 PNGAPI
png_get_user_width_max(png_const_structrp png_ptr)
{
return (png_ptr ? png_ptr->user_width_max : 0 );
}
png_uint_32 PNGAPI
png_get_user_height_max(png_const_structrp 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_const_structrp png_ptr)
{
return (png_ptr ? png_ptr->user_chunk_cache_max : 0 );
}
/* This function was added to libpng 1.4.1 */
png_alloc_size_t PNGAPI
png_get_chunk_malloc_max(png_const_structrp png_ptr)
{
return (png_ptr ? png_ptr->user_chunk_malloc_max : 0 );
}
#endif /* SET_USER_LIMITS */
/* These functions were added to libpng 1.4.0 */
#ifdef PNG_IO_STATE_SUPPORTED
png_uint_32 PNGAPI
png_get_io_state(png_const_structrp png_ptr)
{
return png_ptr->io_state;
}
png_uint_32 PNGAPI
png_get_io_chunk_type(png_const_structrp png_ptr)
{
return png_ptr->chunk_name;
}
#endif /* IO_STATE */
#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
# ifdef PNG_GET_PALETTE_MAX_SUPPORTED
int PNGAPI
png_get_palette_max(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return png_ptr->num_palette_max;
return -1 ;
}
# endif
#endif
#ifdef PNG_APNG_SUPPORTED
png_uint_32 PNGAPI
png_get_acTL(png_structp png_ptr, png_infop info_ptr,
png_uint_32 *num_frames, png_uint_32 *num_plays)
{
png_debug1(1 , "in %s retrieval function" , "acTL" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_acTL) != 0 &&
num_frames != NULL && num_plays != NULL)
{
*num_frames = info_ptr->num_frames;
*num_plays = info_ptr->num_plays;
return (1 );
}
return (0 );
}
png_uint_32 PNGAPI
png_get_num_frames(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_num_frames()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->num_frames);
return (0 );
}
png_uint_32 PNGAPI
png_get_num_plays(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_num_plays()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->num_plays);
return (0 );
}
png_uint_32 PNGAPI
png_get_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
png_uint_32 *width, png_uint_32 *height,
png_uint_32 *x_offset, png_uint_32 *y_offset,
png_uint_16 *delay_num, png_uint_16 *delay_den,
png_byte *dispose_op, png_byte *blend_op)
{
png_debug1(1 , "in %s retrieval function" , "fcTL" );
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_fcTL) != 0 &&
width != NULL && height != NULL &&
x_offset != NULL && y_offset != NULL &&
delay_num != NULL && delay_den != NULL &&
dispose_op != NULL && blend_op != NULL)
{
*width = info_ptr->next_frame_width;
*height = info_ptr->next_frame_height;
*x_offset = info_ptr->next_frame_x_offset;
*y_offset = info_ptr->next_frame_y_offset;
*delay_num = info_ptr->next_frame_delay_num;
*delay_den = info_ptr->next_frame_delay_den;
*dispose_op = info_ptr->next_frame_dispose_op;
*blend_op = info_ptr->next_frame_blend_op;
return (1 );
}
return (0 );
}
png_uint_32 PNGAPI
png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_next_frame_width()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->next_frame_width);
return (0 );
}
png_uint_32 PNGAPI
png_get_next_frame_height(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_next_frame_height()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->next_frame_height);
return (0 );
}
png_uint_32 PNGAPI
png_get_next_frame_x_offset(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_next_frame_x_offset()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->next_frame_x_offset);
return (0 );
}
png_uint_32 PNGAPI
png_get_next_frame_y_offset(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_next_frame_y_offset()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->next_frame_y_offset);
return (0 );
}
png_uint_16 PNGAPI
png_get_next_frame_delay_num(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_next_frame_delay_num()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->next_frame_delay_num);
return (0 );
}
png_uint_16 PNGAPI
png_get_next_frame_delay_den(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_next_frame_delay_den()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->next_frame_delay_den);
return (0 );
}
png_byte PNGAPI
png_get_next_frame_dispose_op(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_next_frame_dispose_op()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->next_frame_dispose_op);
return (0 );
}
png_byte PNGAPI
png_get_next_frame_blend_op(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_get_next_frame_blend_op()" );
if (png_ptr != NULL && info_ptr != NULL)
return (info_ptr->next_frame_blend_op);
return (0 );
}
png_byte PNGAPI
png_get_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1 , "in png_first_frame_is_hidden()" );
if (png_ptr != NULL)
return (png_byte)(png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN);
PNG_UNUSED(info_ptr)
return 0 ;
}
#endif /* APNG */
#endif /* READ || WRITE */
Messung V0.5 in Prozent C=97 H=100 G=98
¤ Dauer der Verarbeitung: 0.19 Sekunden
(vorverarbeitet am 2026-08-24)
¤
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