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libpng/pngget.c

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1997-05-16 07:46:07 +00:00
/* pngget.c - retrieval of values from info struct
1998-01-01 13:13:13 +00:00
*
* Last changed in libpng 1.2.41 [November 11, 2009]
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* Copyright (c) 1998-2009 Glenn Randers-Pehrson
2000-06-04 19:29:29 +00:00
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*
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*/
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#define PNG_INTERNAL
#include "png.h"
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#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
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png_uint_32 PNGAPI
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png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return(info_ptr->valid & flag);
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else
return(0);
}
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png_uint_32 PNGAPI
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png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return(info_ptr->rowbytes);
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else
return(0);
}
#ifdef PNG_INFO_IMAGE_SUPPORTED
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png_bytepp PNGAPI
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png_get_rows(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->row_pointers);
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else
return(0);
}
#endif
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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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png_uint_32 PNGAPI
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png_get_image_width(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return info_ptr->width;
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return (0);
}
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png_uint_32 PNGAPI
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png_get_image_height(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return info_ptr->height;
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return (0);
}
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png_byte PNGAPI
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png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return info_ptr->bit_depth;
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return (0);
}
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png_byte PNGAPI
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png_get_color_type(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return info_ptr->color_type;
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return (0);
}
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png_byte PNGAPI
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png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return info_ptr->filter_type;
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return (0);
}
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png_byte PNGAPI
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png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return info_ptr->interlace_type;
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return (0);
}
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png_byte PNGAPI
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png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return info_ptr->compression_type;
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return (0);
}
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png_uint_32 PNGAPI
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png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_pHYs)
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{
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png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter");
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if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
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return (0);
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else
return (info_ptr->x_pixels_per_unit);
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}
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#else
return (0);
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#endif
return (0);
}
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png_uint_32 PNGAPI
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png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_pHYs)
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{
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png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter");
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if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
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return (0);
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else
return (info_ptr->y_pixels_per_unit);
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}
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#else
return (0);
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#endif
return (0);
}
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png_uint_32 PNGAPI
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png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_pHYs)
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{
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png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
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if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
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info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
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return (0);
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else
return (info_ptr->x_pixels_per_unit);
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}
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#else
return (0);
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#endif
return (0);
}
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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float PNGAPI
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png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_pHYs)
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{
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png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
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if (info_ptr->x_pixels_per_unit == 0)
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return ((float)0.0);
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else
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return ((float)((float)info_ptr->y_pixels_per_unit
/(float)info_ptr->x_pixels_per_unit));
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}
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#else
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return (0.0);
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#endif
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return ((float)0.0);
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}
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#endif
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png_int_32 PNGAPI
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png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_oFFs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_oFFs)
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{
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png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
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if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
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return (0);
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else
return (info_ptr->x_offset);
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}
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#else
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return (0);
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#endif
return (0);
}
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png_int_32 PNGAPI
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png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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#ifdef PNG_oFFs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_oFFs)
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{
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png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
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if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
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return (0);
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else
return (info_ptr->y_offset);
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}
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#else
return (0);
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#endif
return (0);
}
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png_int_32 PNGAPI
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png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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#ifdef PNG_oFFs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_oFFs)
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{
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png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
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if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
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return (0);
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else
return (info_ptr->x_offset);
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}
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#else
return (0);
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#endif
return (0);
}
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png_int_32 PNGAPI
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png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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#ifdef PNG_oFFs_SUPPORTED
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if (info_ptr->valid & PNG_INFO_oFFs)
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{
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png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
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if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
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return (0);
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else
return (info_ptr->y_offset);
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}
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#else
return (0);
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#endif
return (0);
}
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#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
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png_uint_32 PNGAPI
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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)
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*.0254 +.5));
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}
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png_uint_32 PNGAPI
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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)
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*.0254 +.5));
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}
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png_uint_32 PNGAPI
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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)
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*.0254 +.5));
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}
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float PNGAPI
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png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
{
return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
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*.00003937);
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}
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float PNGAPI
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png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
{
return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
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*.00003937);
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}
#ifdef PNG_pHYs_SUPPORTED
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png_uint_32 PNGAPI
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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;
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if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
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{
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png_debug1(1, "in %s retrieval function", "pHYs");
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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;
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if (*unit_type == 1)
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{
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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);
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}
}
}
return (retval);
}
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#endif /* PNG_pHYs_SUPPORTED */
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#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
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/* png_get_channels really belongs in here, too, but it's been around longer */
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#endif /* PNG_EASY_ACCESS_SUPPORTED */
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png_byte PNGAPI
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png_get_channels(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return(info_ptr->channels);
else
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return (0);
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}
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png_bytep PNGAPI
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png_get_signature(png_structp png_ptr, png_infop info_ptr)
{
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if (png_ptr != NULL && info_ptr != NULL)
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return(info_ptr->signature);
else
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return (NULL);
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}
#ifdef PNG_bKGD_SUPPORTED
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png_uint_32 PNGAPI
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png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
png_color_16p *background)
{
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if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
&& background != NULL)
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{
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png_debug1(1, "in %s retrieval function", "bKGD");
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*background = &(info_ptr->background);
return (PNG_INFO_bKGD);
}
return (0);
}
#endif
#ifdef PNG_cHRM_SUPPORTED
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#ifdef PNG_FLOATING_POINT_SUPPORTED
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png_uint_32 PNGAPI
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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)
{
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if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
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{
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png_debug1(1, "in %s retrieval function", "cHRM");
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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
{
png_debug1(1, "in %s retrieval function", "cHRM");
1999-12-10 15:43:02 +00:00
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
{
if (white_x != NULL)
*white_x = info_ptr->int_x_white;
if (white_y != NULL)
*white_y = info_ptr->int_y_white;
if (red_x != NULL)
*red_x = info_ptr->int_x_red;
if (red_y != NULL)
*red_y = info_ptr->int_y_red;
if (green_x != NULL)
*green_x = info_ptr->int_x_green;
if (green_y != NULL)
*green_y = info_ptr->int_y_green;
if (blue_x != NULL)
*blue_x = info_ptr->int_x_blue;
if (blue_y != NULL)
*blue_y = info_ptr->int_y_blue;
return (PNG_INFO_cHRM);
}
return (0);
}
#endif
#endif
1997-05-16 07:46:07 +00:00
#ifdef 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)
{
png_debug1(1, "in %s retrieval function", "gAMA");
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
{
*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
{
png_debug1(1, "in %s retrieval function", "gAMA");
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)
{
*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
#ifdef 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
{
png_debug1(1, "in %s retrieval function", "sRGB");
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
{
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
#ifdef 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
{
png_debug1(1, "in %s retrieval function", "iCCP");
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)
{
*name = info_ptr->iccp_name;
*profile = info_ptr->iccp_profile;
2009-05-20 17:43:52 +00:00
/* Compression_type is a dummy so the API won't have to change
* if we introduce multiple compression types later.
*/
1999-12-10 15:43:02 +00:00
*proflen = (int)info_ptr->iccp_proflen;
*compression_type = (int)info_ptr->iccp_compression;
return (PNG_INFO_iCCP);
}
return (0);
}
#endif
#ifdef 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)
2007-05-28 13:45:13 +00:00
{
1999-12-10 15:43:02 +00:00
*spalettes = info_ptr->splt_palettes;
2007-05-28 13:45:13 +00:00
return ((png_uint_32)info_ptr->splt_palettes_num);
}
return (0);
1999-12-10 15:43:02 +00:00
}
#endif
#ifdef 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)
{
png_debug1(1, "in %s retrieval function", "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
{
*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)
1997-05-16 07:46:07 +00:00
{
png_debug1(1, "in %s retrieval function", "IHDR");
2009-05-20 17:43:52 +00:00
if (png_ptr == NULL || info_ptr == NULL || width == NULL ||
height == NULL || bit_depth == NULL || color_type == NULL)
return (0);
2009-05-20 17:43:52 +00:00
*width = info_ptr->width;
*height = info_ptr->height;
*bit_depth = info_ptr->bit_depth;
*color_type = info_ptr->color_type;
2009-05-20 17:43:52 +00:00
if (compression_type != NULL)
*compression_type = info_ptr->compression_type;
1998-02-07 16:20:57 +00:00
if (filter_type != NULL)
*filter_type = info_ptr->filter_type;
2009-05-20 17:43:52 +00:00
if (interlace_type != NULL)
*interlace_type = info_ptr->interlace_type;
2009-05-20 17:43:52 +00:00
/* 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);
2009-05-20 17:43:52 +00:00
return (1);
1997-05-16 07:46:07 +00:00
}
#ifdef 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
{
png_debug1(1, "in %s retrieval function", "oFFs");
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
{
*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
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)
{
png_debug1(1, "in %s retrieval function", "pCAL");
2000-02-05 05:40:16 +00:00
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
2009-05-20 17:43:52 +00:00
&& purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
nparams != NULL && units != NULL && params != NULL)
1997-05-16 07:46:07 +00:00
{
*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
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 &&
2009-05-20 17:43:52 +00:00
(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 &&
2009-05-20 17:43:52 +00:00
(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
#ifdef 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;
png_debug1(1, "in %s retrieval function", "pHYs");
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
{
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;
}
2009-05-20 17:43:52 +00:00
1998-02-28 13:00:24 +00:00
if (res_y != NULL)
{
1998-01-01 13:13:13 +00:00
*res_y = info_ptr->y_pixels_per_unit;
retval |= PNG_INFO_pHYs;
}
2009-05-20 17:43:52 +00:00
1998-01-01 13:13:13 +00:00
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)
{
png_debug1(1, "in %s retrieval function", "PLTE");
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
{
*palette = info_ptr->palette;
*num_palette = info_ptr->num_palette;
2008-12-01 14:58:57 +00:00
png_debug1(3, "num_palette = %d", *num_palette);
1997-05-16 07:46:07 +00:00
return (PNG_INFO_PLTE);
}
return (0);
}
#ifdef 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)
{
png_debug1(1, "in %s retrieval function", "sBIT");
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
{
*sig_bit = &(info_ptr->sig_bit);
return (PNG_INFO_sBIT);
}
return (0);
}
#endif
#ifdef 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
{
2008-12-01 14:58:57 +00:00
png_debug1(1, "in %s retrieval function",
1998-01-17 04:06:18 +00:00
(png_ptr->chunk_name[0] == '\0' ? "text"
: (png_const_charp)png_ptr->chunk_name));
2009-05-20 17:43:52 +00:00
1997-05-16 07:46:07 +00:00
if (text_ptr != NULL)
*text_ptr = info_ptr->text;
2009-05-20 17:43:52 +00:00
1997-05-16 07:46:07 +00:00
if (num_text != NULL)
*num_text = info_ptr->num_text;
2009-05-20 17:43:52 +00:00
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
#ifdef 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)
{
png_debug1(1, "in %s retrieval function", "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
{
*mod_time = &(info_ptr->mod_time);
return (PNG_INFO_tIME);
}
return (0);
}
#endif
#ifdef 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
{
2008-12-01 14:58:57 +00:00
png_debug1(1, "in %s retrieval function", "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;
}
2009-05-20 17:43:52 +00:00
1998-02-28 13:00:24 +00:00
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;
}
2009-05-20 17:43:52 +00:00
2008-07-10 14:10:58 +00:00
if (trans != NULL)
1998-02-28 13:00:24 +00:00
*trans = NULL;
1997-05-16 07:46:07 +00:00
}
2008-07-10 14:10:58 +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
#ifdef 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)
2007-05-28 13:45:13 +00:00
{
1999-12-10 15:43:02 +00:00
*unknowns = info_ptr->unknown_chunks;
2007-05-28 13:45:13 +00:00
return ((png_uint_32)info_ptr->unknown_chunks_num);
}
return (0);
1999-12-10 15:43:02 +00:00
}
#endif
#ifdef 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
#ifdef 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
2004-07-28 13:20:44 +00:00
#ifdef PNG_WRITE_SUPPORTED
2000-05-06 19:09:57 +00:00
png_uint_32 PNGAPI
2000-04-24 04:14:02 +00:00
png_get_compression_buffer_size(png_structp png_ptr)
{
2001-01-12 21:13:06 +00:00
return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
2000-04-24 04:14:02 +00:00
}
2004-07-28 13:20:44 +00:00
#endif
2001-05-14 14:20:53 +00:00
2006-12-07 04:06:25 +00:00
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
2002-03-08 07:31:27 +00:00
#ifndef PNG_1_0_X
2009-05-20 17:43:52 +00:00
/* This function was added to libpng 1.2.0 and should exist by default */
2001-05-14 14:20:53 +00:00
png_uint_32 PNGAPI
png_get_asm_flags (png_structp png_ptr)
{
2009-05-20 17:43:52 +00:00
/* Obsolete, to be removed from libpng-1.4.0 */
2006-12-03 12:15:31 +00:00
return (png_ptr? 0L: 0L);
2001-05-14 14:20:53 +00:00
}
2009-05-20 17:43:52 +00:00
/* This function was added to libpng 1.2.0 and should exist by default */
2001-05-14 14:20:53 +00:00
png_uint_32 PNGAPI
png_get_asm_flagmask (int flag_select)
{
2009-05-20 17:43:52 +00:00
/* Obsolete, to be removed from libpng-1.4.0 */
2007-09-01 20:12:50 +00:00
flag_select=flag_select;
return 0L;
2006-12-03 12:15:31 +00:00
}
2001-05-14 14:20:53 +00:00
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
2009-05-20 17:43:52 +00:00
/* This function was added to libpng 1.2.0 */
2001-05-14 14:20:53 +00:00
png_uint_32 PNGAPI
png_get_mmx_flagmask (int flag_select, int *compilerID)
{
2009-05-20 17:43:52 +00:00
/* Obsolete, to be removed from libpng-1.4.0 */
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flag_select=flag_select;
*compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
return 0L;
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}
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/* This function was added to libpng 1.2.0 */
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png_byte PNGAPI
png_get_mmx_bitdepth_threshold (png_structp png_ptr)
{
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/* Obsolete, to be removed from libpng-1.4.0 */
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return (png_ptr? 0: 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
png_get_mmx_rowbytes_threshold (png_structp png_ptr)
{
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/* Obsolete, to be removed from libpng-1.4.0 */
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return (png_ptr? 0L: 0L);
}
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#endif /* ?PNG_1_0_X */
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#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
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#ifdef PNG_SET_USER_LIMITS_SUPPORTED
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/* These functions were added to libpng 1.2.6 */
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png_uint_32 PNGAPI
png_get_user_width_max (png_structp png_ptr)
{
return (png_ptr? png_ptr->user_width_max : 0);
}
png_uint_32 PNGAPI
png_get_user_height_max (png_structp png_ptr)
{
return (png_ptr? png_ptr->user_height_max : 0);
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
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#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */