1997-05-16 07:46:07 +00:00
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|
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/* pngget.c - retrieval of values from info struct
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1998-01-01 13:13:13 +00:00
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*
|
2002-03-08 07:31:27 +00:00
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* libpng 1.2.2beta4 - March 8, 2002
|
1998-01-01 13:13:13 +00:00
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* For conditions of distribution and use, see copyright notice in png.h
|
2002-02-24 00:55:25 +00:00
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* Copyright (c) 1998-2002 Glenn Randers-Pehrson
|
2000-06-04 19:29:29 +00:00
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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1998-01-01 13:13:13 +00:00
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*/
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1997-05-16 07:46:07 +00:00
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#define PNG_INTERNAL
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#include "png.h"
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2000-05-06 19:09:57 +00:00
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png_uint_32 PNGAPI
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1997-05-16 07:46:07 +00:00
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png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
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{
|
1998-02-09 02:56:40 +00:00
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if (png_ptr != NULL && info_ptr != NULL)
|
1997-05-16 07:46:07 +00:00
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return(info_ptr->valid & flag);
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else
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return(0);
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}
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2000-05-06 19:09:57 +00:00
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png_uint_32 PNGAPI
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1997-05-16 07:46:07 +00:00
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png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
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{
|
1998-02-09 02:56:40 +00:00
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if (png_ptr != NULL && info_ptr != NULL)
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1997-05-16 07:46:07 +00:00
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return(info_ptr->rowbytes);
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else
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return(0);
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}
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2000-02-18 19:48:52 +00:00
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#if defined(PNG_INFO_IMAGE_SUPPORTED)
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2000-05-06 19:09:57 +00:00
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png_bytepp PNGAPI
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2000-02-18 19:48:52 +00:00
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png_get_rows(png_structp png_ptr, png_infop info_ptr)
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{
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if (png_ptr != NULL && info_ptr != NULL)
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return(info_ptr->row_pointers);
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else
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return(0);
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}
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#endif
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1998-01-31 03:45:12 +00:00
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#ifdef PNG_EASY_ACCESS_SUPPORTED
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/* easy access to info, added in libpng-0.99 */
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2000-05-06 19:09:57 +00:00
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png_uint_32 PNGAPI
|
1998-01-31 03:45:12 +00:00
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png_get_image_width(png_structp png_ptr, png_infop info_ptr)
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{
|
1998-02-09 02:56:40 +00:00
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|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
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|
return info_ptr->width;
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|
}
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|
return (0);
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|
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|
}
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|
2000-05-06 19:09:57 +00:00
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|
png_uint_32 PNGAPI
|
1998-01-31 03:45:12 +00:00
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png_get_image_height(png_structp png_ptr, png_infop info_ptr)
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|
|
|
{
|
1998-02-09 02:56:40 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
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return info_ptr->height;
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|
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}
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|
return (0);
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}
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|
2000-05-06 19:09:57 +00:00
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|
png_byte PNGAPI
|
1998-01-31 03:45:12 +00:00
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png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
1998-02-09 02:56:40 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
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|
return info_ptr->bit_depth;
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|
}
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|
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|
return (0);
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|
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|
}
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|
2000-05-06 19:09:57 +00:00
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png_byte PNGAPI
|
1998-01-31 03:45:12 +00:00
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png_get_color_type(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
1998-02-09 02:56:40 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
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|
|
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return info_ptr->color_type;
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|
|
|
}
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|
|
|
return (0);
|
|
|
|
}
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|
|
|
|
2000-05-06 19:09:57 +00:00
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|
png_byte PNGAPI
|
1998-01-31 03:45:12 +00:00
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png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
1998-02-09 02:56:40 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
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|
return info_ptr->filter_type;
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|
|
|
}
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|
|
|
return (0);
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|
|
|
}
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
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|
png_byte PNGAPI
|
1998-01-31 03:45:12 +00:00
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|
png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
1998-02-09 02:56:40 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
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|
|
|
return info_ptr->interlace_type;
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|
|
|
}
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|
|
|
return (0);
|
|
|
|
}
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|
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|
2000-05-06 19:09:57 +00:00
|
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|
png_byte PNGAPI
|
1998-01-31 03:45:12 +00:00
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|
png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
1998-02-09 02:56:40 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
|
|
|
|
return info_ptr->compression_type;
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1998-02-28 13:00:24 +00:00
|
|
|
png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
2000-05-29 13:58:03 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1999-12-10 15:43:02 +00:00
|
|
|
#if defined(PNG_pHYs_SUPPORTED)
|
2000-05-29 13:58:03 +00:00
|
|
|
if (info_ptr->valid & PNG_INFO_pHYs)
|
1998-02-28 13:00:24 +00:00
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
2000-05-29 13:58:03 +00:00
|
|
|
#else
|
|
|
|
return (0);
|
1998-02-28 13:00:24 +00:00
|
|
|
#endif
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1998-02-28 13:00:24 +00:00
|
|
|
png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
2000-05-29 13:58:03 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1999-12-10 15:43:02 +00:00
|
|
|
#if defined(PNG_pHYs_SUPPORTED)
|
2000-05-29 13:58:03 +00:00
|
|
|
if (info_ptr->valid & PNG_INFO_pHYs)
|
1998-02-28 13:00:24 +00:00
|
|
|
{
|
2001-05-07 19:52:45 +00:00
|
|
|
png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
|
1998-02-28 13:00:24 +00:00
|
|
|
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
|
|
|
|
return (0);
|
|
|
|
else return (info_ptr->y_pixels_per_unit);
|
|
|
|
}
|
2000-05-29 13:58:03 +00:00
|
|
|
#else
|
|
|
|
return (0);
|
1998-02-28 13:00:24 +00:00
|
|
|
#endif
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1998-01-31 03:45:12 +00:00
|
|
|
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
2000-05-29 13:58:03 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1999-12-10 15:43:02 +00:00
|
|
|
#if defined(PNG_pHYs_SUPPORTED)
|
2000-05-29 13:58:03 +00:00
|
|
|
if (info_ptr->valid & PNG_INFO_pHYs)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
|
1998-02-28 13:00:24 +00:00
|
|
|
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
|
|
|
|
info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
|
1998-01-31 03:45:12 +00:00
|
|
|
return (0);
|
|
|
|
else return (info_ptr->x_pixels_per_unit);
|
|
|
|
}
|
2000-05-29 13:58:03 +00:00
|
|
|
#else
|
|
|
|
return (0);
|
1998-01-31 03:45:12 +00:00
|
|
|
#endif
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
1999-12-10 15:43:02 +00:00
|
|
|
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
2000-05-06 19:09:57 +00:00
|
|
|
float PNGAPI
|
1998-01-31 03:45:12 +00:00
|
|
|
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
2000-05-29 13:58:03 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1999-12-10 15:43:02 +00:00
|
|
|
#if defined(PNG_pHYs_SUPPORTED)
|
2000-05-29 13:58:03 +00:00
|
|
|
if (info_ptr->valid & PNG_INFO_pHYs)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
|
|
|
|
if (info_ptr->x_pixels_per_unit == 0)
|
1998-02-07 16:20:57 +00:00
|
|
|
return ((float)0.0);
|
1998-01-31 03:45:12 +00:00
|
|
|
else
|
2000-05-29 13:58:03 +00:00
|
|
|
return ((float)((float)info_ptr->y_pixels_per_unit
|
|
|
|
/(float)info_ptr->x_pixels_per_unit));
|
1998-01-31 03:45:12 +00:00
|
|
|
}
|
2000-05-29 13:58:03 +00:00
|
|
|
#else
|
|
|
|
return (0.0);
|
1998-01-31 03:45:12 +00:00
|
|
|
#endif
|
2000-05-29 13:58:03 +00:00
|
|
|
return ((float)0.0);
|
1998-01-31 03:45:12 +00:00
|
|
|
}
|
1999-12-10 15:43:02 +00:00
|
|
|
#endif
|
1998-01-31 03:45:12 +00:00
|
|
|
|
2000-05-29 13:58:03 +00:00
|
|
|
png_int_32 PNGAPI
|
1998-01-31 03:45:12 +00:00
|
|
|
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
2000-05-29 13:58:03 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1999-12-10 15:43:02 +00:00
|
|
|
#if defined(PNG_oFFs_SUPPORTED)
|
2000-05-29 13:58:03 +00:00
|
|
|
if (info_ptr->valid & PNG_INFO_oFFs)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
2000-05-29 13:58:03 +00:00
|
|
|
#else
|
|
|
|
return (0);
|
1998-01-31 03:45:12 +00:00
|
|
|
#endif
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
2000-05-29 13:58:03 +00:00
|
|
|
png_int_32 PNGAPI
|
1998-01-31 03:45:12 +00:00
|
|
|
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
2000-05-29 13:58:03 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1999-12-10 15:43:02 +00:00
|
|
|
#if defined(PNG_oFFs_SUPPORTED)
|
2000-05-29 13:58:03 +00:00
|
|
|
if (info_ptr->valid & PNG_INFO_oFFs)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
2000-05-29 13:58:03 +00:00
|
|
|
#else
|
|
|
|
return (0);
|
1998-01-31 03:45:12 +00:00
|
|
|
#endif
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
2000-05-29 13:58:03 +00:00
|
|
|
png_int_32 PNGAPI
|
1998-01-31 03:45:12 +00:00
|
|
|
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
2000-05-29 13:58:03 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1999-12-10 15:43:02 +00:00
|
|
|
#if defined(PNG_oFFs_SUPPORTED)
|
2000-05-29 13:58:03 +00:00
|
|
|
if (info_ptr->valid & PNG_INFO_oFFs)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
2000-05-29 13:58:03 +00:00
|
|
|
#else
|
|
|
|
return (0);
|
1998-01-31 03:45:12 +00:00
|
|
|
#endif
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
2000-05-29 13:58:03 +00:00
|
|
|
png_int_32 PNGAPI
|
1998-01-31 03:45:12 +00:00
|
|
|
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
2000-05-29 13:58:03 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1999-12-10 15:43:02 +00:00
|
|
|
#if defined(PNG_oFFs_SUPPORTED)
|
2000-05-29 13:58:03 +00:00
|
|
|
if (info_ptr->valid & PNG_INFO_oFFs)
|
1998-01-31 03:45:12 +00:00
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
2000-05-29 13:58:03 +00:00
|
|
|
#else
|
|
|
|
return (0);
|
1998-01-31 03:45:12 +00:00
|
|
|
#endif
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
1999-12-10 15:43:02 +00:00
|
|
|
#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1998-02-28 13:00:24 +00:00
|
|
|
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)
|
2000-05-29 13:58:03 +00:00
|
|
|
*.0254 +.5));
|
1998-02-28 13:00:24 +00:00
|
|
|
}
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1998-02-28 13:00:24 +00:00
|
|
|
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)
|
2000-05-29 13:58:03 +00:00
|
|
|
*.0254 +.5));
|
1998-02-28 13:00:24 +00:00
|
|
|
}
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1998-02-28 13:00:24 +00:00
|
|
|
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)
|
2000-05-29 13:58:03 +00:00
|
|
|
*.0254 +.5));
|
1998-02-28 13:00:24 +00:00
|
|
|
}
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
float PNGAPI
|
1998-02-28 13:00:24 +00:00
|
|
|
png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
|
|
|
return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
|
2000-02-18 19:48:52 +00:00
|
|
|
*.00003937);
|
1998-02-28 13:00:24 +00:00
|
|
|
}
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
float PNGAPI
|
1998-02-28 13:00:24 +00:00
|
|
|
png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
|
|
|
return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
|
2000-05-29 13:58:03 +00:00
|
|
|
*.00003937);
|
1998-02-28 13:00:24 +00:00
|
|
|
}
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_pHYs_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1998-02-28 13:00:24 +00:00
|
|
|
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;
|
|
|
|
|
2000-02-05 05:40:16 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
|
1998-02-28 13:00:24 +00:00
|
|
|
{
|
|
|
|
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;
|
2000-05-29 13:58:03 +00:00
|
|
|
if(*unit_type == 1)
|
1998-02-28 13:00:24 +00:00
|
|
|
{
|
2000-02-18 19:48:52 +00:00
|
|
|
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);
|
1998-02-28 13:00:24 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return (retval);
|
|
|
|
}
|
2001-05-07 19:52:45 +00:00
|
|
|
#endif /* PNG_pHYs_SUPPORTED */
|
2000-02-05 05:40:16 +00:00
|
|
|
#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
|
1998-02-28 13:00:24 +00:00
|
|
|
|
|
|
|
/* png_get_channels really belongs in here, too, but it's been around longer */
|
1998-06-06 20:31:35 +00:00
|
|
|
|
1998-02-28 13:00:24 +00:00
|
|
|
#endif /* PNG_EASY_ACCESS_SUPPORTED */
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_byte PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_channels(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
1998-02-09 02:56:40 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
return(info_ptr->channels);
|
|
|
|
else
|
1998-02-07 16:20:57 +00:00
|
|
|
return (0);
|
1997-05-16 07:46:07 +00:00
|
|
|
}
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_bytep PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_signature(png_structp png_ptr, png_infop info_ptr)
|
|
|
|
{
|
1998-02-09 02:56:40 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
return(info_ptr->signature);
|
|
|
|
else
|
1998-02-07 16:20:57 +00:00
|
|
|
return (NULL);
|
1997-05-16 07:46:07 +00:00
|
|
|
}
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_bKGD_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
|
|
|
|
png_color_16p *background)
|
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
|
|
|
|
&& background != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "bKGD");
|
|
|
|
*background = &(info_ptr->background);
|
|
|
|
return (PNG_INFO_bKGD);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_cHRM_SUPPORTED)
|
1999-12-10 15:43:02 +00:00
|
|
|
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
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)
|
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
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
|
1999-12-10 15:43:02 +00:00
|
|
|
#ifdef PNG_FIXED_POINT_SUPPORTED
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1999-12-10 15:43:02 +00:00
|
|
|
png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
|
2000-02-05 05:40:16 +00:00
|
|
|
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)
|
1999-12-10 15:43:02 +00:00
|
|
|
{
|
|
|
|
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
|
1997-05-16 07:46:07 +00:00
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_gAMA_SUPPORTED)
|
1999-12-10 15:43:02 +00:00
|
|
|
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
|
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
|
|
|
|
&& file_gamma != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "gAMA");
|
|
|
|
*file_gamma = (double)info_ptr->gamma;
|
|
|
|
return (PNG_INFO_gAMA);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
#endif
|
2000-05-01 14:31:54 +00:00
|
|
|
#ifdef PNG_FIXED_POINT_SUPPORTED
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1999-12-10 15:43:02 +00:00
|
|
|
png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
|
2000-02-05 05:40:16 +00:00
|
|
|
png_fixed_point *int_file_gamma)
|
1999-12-10 15:43:02 +00:00
|
|
|
{
|
|
|
|
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
|
2000-05-01 14:31:54 +00:00
|
|
|
#endif
|
1997-05-16 07:46:07 +00:00
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_sRGB_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1998-01-17 04:06:18 +00:00
|
|
|
png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
|
1998-01-01 13:13:13 +00:00
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
|
|
|
|
&& file_srgb_intent != NULL)
|
1998-01-01 13:13:13 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "sRGB");
|
1998-01-17 04:06:18 +00:00
|
|
|
*file_srgb_intent = (int)info_ptr->srgb_intent;
|
1998-01-01 13:13:13 +00:00
|
|
|
return (PNG_INFO_sRGB);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_iCCP_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1999-12-10 15:43:02 +00:00
|
|
|
png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
|
|
|
|
png_charpp name, int *compression_type,
|
2000-02-05 05:40:16 +00:00
|
|
|
png_charpp profile, png_uint_32 *proflen)
|
1999-12-10 15:43:02 +00:00
|
|
|
{
|
|
|
|
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
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_sPLT_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
2000-02-18 19:48:52 +00:00
|
|
|
png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
|
2000-03-21 11:13:06 +00:00
|
|
|
png_sPLT_tpp spalettes)
|
1999-12-10 15:43:02 +00:00
|
|
|
{
|
|
|
|
if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
|
|
|
|
*spalettes = info_ptr->splt_palettes;
|
|
|
|
return ((png_uint_32)info_ptr->splt_palettes_num);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_hIST_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
|
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
|
|
|
|
&& hist != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "hIST");
|
|
|
|
*hist = info_ptr->hist;
|
|
|
|
return (PNG_INFO_hIST);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
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)
|
1998-12-29 17:47:59 +00:00
|
|
|
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
1998-02-09 02:56:40 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
|
1997-05-16 07:46:07 +00:00
|
|
|
bit_depth != NULL && color_type != NULL)
|
|
|
|
{
|
1998-02-07 16:20:57 +00:00
|
|
|
int pixel_depth, channels;
|
|
|
|
png_uint_32 rowbytes_per_pixel;
|
|
|
|
|
1997-05-16 07:46:07 +00:00
|
|
|
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;
|
1998-02-07 16:20:57 +00:00
|
|
|
|
|
|
|
/* 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;
|
2002-02-24 00:55:25 +00:00
|
|
|
if (width == 0 || *width > PNG_MAX_UINT)
|
|
|
|
png_error(png_ptr, "Invalid image width");
|
|
|
|
if (height == 0 || *height > PNG_MAX_UINT)
|
|
|
|
png_error(png_ptr, "Invalid image height");
|
1999-09-17 17:27:26 +00:00
|
|
|
if ((*width > PNG_MAX_UINT/rowbytes_per_pixel))
|
1998-02-07 16:20:57 +00:00
|
|
|
{
|
|
|
|
png_warning(png_ptr,
|
|
|
|
"Width too large for libpng to process image data.");
|
|
|
|
}
|
1997-05-16 07:46:07 +00:00
|
|
|
return (1);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_oFFs_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
|
1999-12-10 15:43:02 +00:00
|
|
|
png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
|
|
|
|
&& offset_x != NULL && offset_y != NULL && unit_type != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
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
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_pCAL_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
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)
|
|
|
|
{
|
2000-02-05 05:40:16 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
|
|
|
|
&& purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
|
1997-05-16 07:46:07 +00:00
|
|
|
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
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_sCAL_SUPPORTED)
|
1999-12-10 15:43:02 +00:00
|
|
|
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1999-12-10 15:43:02 +00:00
|
|
|
png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
|
2000-02-05 05:40:16 +00:00
|
|
|
int *unit, double *width, double *height)
|
1999-12-10 15:43:02 +00:00
|
|
|
{
|
2000-02-05 05:40:16 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL &&
|
|
|
|
(info_ptr->valid & PNG_INFO_sCAL))
|
1999-12-10 15:43:02 +00:00
|
|
|
{
|
|
|
|
*unit = info_ptr->scal_unit;
|
|
|
|
*width = info_ptr->scal_pixel_width;
|
|
|
|
*height = info_ptr->scal_pixel_height;
|
|
|
|
return (PNG_INFO_sCAL);
|
|
|
|
}
|
|
|
|
return(0);
|
|
|
|
}
|
2000-02-05 05:40:16 +00:00
|
|
|
#else
|
|
|
|
#ifdef PNG_FIXED_POINT_SUPPORTED
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1999-12-10 15:43:02 +00:00
|
|
|
png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
|
2000-02-05 05:40:16 +00:00
|
|
|
int *unit, png_charpp width, png_charpp height)
|
1999-12-10 15:43:02 +00:00
|
|
|
{
|
2000-02-05 05:40:16 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL &&
|
|
|
|
(info_ptr->valid & PNG_INFO_sCAL))
|
1999-12-10 15:43:02 +00:00
|
|
|
{
|
|
|
|
*unit = info_ptr->scal_unit;
|
|
|
|
*width = info_ptr->scal_s_width;
|
|
|
|
*height = info_ptr->scal_s_height;
|
|
|
|
return (PNG_INFO_sCAL);
|
|
|
|
}
|
|
|
|
return(0);
|
|
|
|
}
|
|
|
|
#endif
|
2000-02-05 05:40:16 +00:00
|
|
|
#endif
|
|
|
|
#endif
|
1999-12-10 15:43:02 +00:00
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_pHYs_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
|
|
|
|
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
|
|
|
|
{
|
1998-01-01 13:13:13 +00:00
|
|
|
png_uint_32 retval = 0;
|
|
|
|
|
2000-02-05 05:40:16 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL &&
|
|
|
|
(info_ptr->valid & PNG_INFO_pHYs))
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "pHYs");
|
1998-02-28 13:00:24 +00:00
|
|
|
if (res_x != NULL)
|
1998-01-01 13:13:13 +00:00
|
|
|
{
|
|
|
|
*res_x = info_ptr->x_pixels_per_unit;
|
1998-02-28 13:00:24 +00:00
|
|
|
retval |= PNG_INFO_pHYs;
|
|
|
|
}
|
|
|
|
if (res_y != NULL)
|
|
|
|
{
|
1998-01-01 13:13:13 +00:00
|
|
|
*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;
|
|
|
|
}
|
1997-05-16 07:46:07 +00:00
|
|
|
}
|
1998-02-28 13:00:24 +00:00
|
|
|
return (retval);
|
1997-05-16 07:46:07 +00:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
|
|
|
|
int *num_palette)
|
|
|
|
{
|
2000-02-05 05:40:16 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
|
|
|
|
&& palette != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_sBIT_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
|
|
|
|
{
|
2000-02-05 05:40:16 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
|
|
|
|
&& sig_bit != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "sBIT");
|
|
|
|
*sig_bit = &(info_ptr->sig_bit);
|
|
|
|
return (PNG_INFO_sBIT);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_TEXT_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
|
|
|
|
int *num_text)
|
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n",
|
1998-01-17 04:06:18 +00:00
|
|
|
(png_ptr->chunk_name[0] == '\0' ? "text"
|
|
|
|
: (png_const_charp)png_ptr->chunk_name));
|
1997-05-16 07:46:07 +00:00
|
|
|
if (text_ptr != NULL)
|
|
|
|
*text_ptr = info_ptr->text;
|
|
|
|
if (num_text != NULL)
|
|
|
|
*num_text = info_ptr->num_text;
|
1998-01-01 13:13:13 +00:00
|
|
|
return ((png_uint_32)info_ptr->num_text);
|
1997-05-16 07:46:07 +00:00
|
|
|
}
|
2000-02-18 19:48:52 +00:00
|
|
|
if (num_text != NULL)
|
|
|
|
*num_text = 0;
|
1997-05-16 07:46:07 +00:00
|
|
|
return(0);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_tIME_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
|
|
|
|
{
|
2000-02-05 05:40:16 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
|
|
|
|
&& mod_time != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "tIME");
|
|
|
|
*mod_time = &(info_ptr->mod_time);
|
|
|
|
return (PNG_INFO_tIME);
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_tRNS_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1997-05-16 07:46:07 +00:00
|
|
|
png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
|
|
|
|
png_bytep *trans, int *num_trans, png_color_16p *trans_values)
|
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
png_uint_32 retval = 0;
|
2000-02-05 05:40:16 +00:00
|
|
|
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
|
|
|
png_debug1(1, "in %s retrieval function\n", "tRNS");
|
1998-02-28 13:00:24 +00:00
|
|
|
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
if (trans != NULL)
|
|
|
|
{
|
|
|
|
*trans = info_ptr->trans;
|
|
|
|
retval |= PNG_INFO_tRNS;
|
|
|
|
}
|
|
|
|
if (trans_values != NULL)
|
|
|
|
*trans_values = &(info_ptr->trans_values);
|
1997-05-16 07:46:07 +00:00
|
|
|
}
|
1998-02-28 13:00:24 +00:00
|
|
|
else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
if (trans_values != NULL)
|
|
|
|
{
|
|
|
|
*trans_values = &(info_ptr->trans_values);
|
|
|
|
retval |= PNG_INFO_tRNS;
|
|
|
|
}
|
|
|
|
if(trans != NULL)
|
|
|
|
*trans = NULL;
|
1997-05-16 07:46:07 +00:00
|
|
|
}
|
1998-02-28 13:00:24 +00:00
|
|
|
if(num_trans != NULL)
|
1997-05-16 07:46:07 +00:00
|
|
|
{
|
1998-02-28 13:00:24 +00:00
|
|
|
*num_trans = info_ptr->num_trans;
|
|
|
|
retval |= PNG_INFO_tRNS;
|
1997-05-16 07:46:07 +00:00
|
|
|
}
|
|
|
|
}
|
1998-02-28 13:00:24 +00:00
|
|
|
return (retval);
|
1997-05-16 07:46:07 +00:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
1999-12-10 15:43:02 +00:00
|
|
|
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
|
|
|
|
|
1998-12-29 17:47:59 +00:00
|
|
|
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_byte PNGAPI
|
1998-12-29 17:47:59 +00:00
|
|
|
png_get_rgb_to_gray_status (png_structp png_ptr)
|
|
|
|
{
|
2001-01-12 21:13:06 +00:00
|
|
|
return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
|
1998-12-29 17:47:59 +00:00
|
|
|
}
|
|
|
|
#endif
|
2000-02-05 05:40:16 +00:00
|
|
|
|
2001-05-07 19:52:45 +00:00
|
|
|
#if defined(PNG_USER_CHUNKS_SUPPORTED)
|
2000-05-06 19:09:57 +00:00
|
|
|
png_voidp PNGAPI
|
2000-02-05 05:40:16 +00:00
|
|
|
png_get_user_chunk_ptr(png_structp png_ptr)
|
|
|
|
{
|
2001-01-12 21:13:06 +00:00
|
|
|
return (png_ptr? png_ptr->user_chunk_ptr : NULL);
|
2000-02-05 05:40:16 +00:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2000-04-24 04:14:02 +00:00
|
|
|
|
2000-05-06 19:09:57 +00:00
|
|
|
png_uint_32 PNGAPI
|
2000-04-24 04:14:02 +00:00
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png_get_compression_buffer_size(png_structp png_ptr)
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{
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2001-01-12 21:13:06 +00:00
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return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
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2000-04-24 04:14:02 +00:00
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}
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2001-01-12 21:13:06 +00:00
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2001-05-14 14:20:53 +00:00
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2002-03-08 07:31:27 +00:00
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#ifndef PNG_1_0_X
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2001-05-14 14:20:53 +00:00
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#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
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/* this function was added to libpng 1.2.0 and should exist by default*/
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png_uint_32 PNGAPI
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png_get_asm_flags (png_structp png_ptr)
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{
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return (png_uint_32)(png_ptr? png_ptr->asm_flags : 0L);
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}
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/* this function was added to libpng 1.2.0 and should exist by default */
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png_uint_32 PNGAPI
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png_get_asm_flagmask (int flag_select)
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{
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png_uint_32 settable_asm_flags = 0;
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if (flag_select & PNG_SELECT_READ)
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settable_asm_flags |=
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PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
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PNG_ASM_FLAG_MMX_READ_INTERLACE |
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PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
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PNG_ASM_FLAG_MMX_READ_FILTER_UP |
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PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
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PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
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/* no non-MMX flags yet */
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#if 0
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/* GRR: no write-flags yet, either, but someday... */
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if (flag_select & PNG_SELECT_WRITE)
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settable_asm_flags |=
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PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
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#endif /* 0 */
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return settable_asm_flags; /* _theoretically_ settable capabilities only */
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}
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#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
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#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
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/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
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/* this function was added to libpng 1.2.0 */
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png_uint_32 PNGAPI
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png_get_mmx_flagmask (int flag_select, int *compilerID)
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{
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png_uint_32 settable_mmx_flags = 0;
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if (flag_select & PNG_SELECT_READ)
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settable_mmx_flags |=
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PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
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PNG_ASM_FLAG_MMX_READ_INTERLACE |
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PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
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PNG_ASM_FLAG_MMX_READ_FILTER_UP |
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PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
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PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
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#if 0
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/* GRR: no MMX write support yet, but someday... */
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if (flag_select & PNG_SELECT_WRITE)
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settable_mmx_flags |=
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PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
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#endif /* 0 */
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if (compilerID != NULL) {
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#ifdef PNG_USE_PNGVCRD
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*compilerID = 1; /* MSVC */
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#else
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#ifdef PNG_USE_PNGGCCRD
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*compilerID = 2; /* gcc/gas */
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#else
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*compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
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#endif
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#endif
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}
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return settable_mmx_flags; /* _theoretically_ settable capabilities only */
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}
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/* this function was added to libpng 1.2.0 */
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png_byte PNGAPI
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png_get_mmx_bitdepth_threshold (png_structp png_ptr)
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{
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return (png_byte)(png_ptr? png_ptr->mmx_bitdepth_threshold : 0);
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}
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/* this function was added to libpng 1.2.0 */
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png_uint_32 PNGAPI
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png_get_mmx_rowbytes_threshold (png_structp png_ptr)
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{
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return (png_uint_32)(png_ptr? png_ptr->mmx_rowbytes_threshold : 0L);
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}
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#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
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2002-03-08 07:31:27 +00:00
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#endif /* PNG_1_0_X */
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