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/* pngget.c - retrieval of values from info struct
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*
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* Last changed in libpng 1.2.37 [June 4, 2009]
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* Copyright (c) 1998-2009 Glenn Randers-Pehrson
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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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*
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* This code is released under the libpng license.
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* For conditions of distribution and use, see the disclaimer
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* and license in png.h
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*
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*/
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#define PNG_INTERNAL
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#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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{
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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
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return(0);
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}
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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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{
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if (png_ptr != NULL && info_ptr != NULL)
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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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#if defined(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)
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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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#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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{
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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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}
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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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{
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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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}
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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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{
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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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}
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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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{
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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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}
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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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{
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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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}
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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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{
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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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}
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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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{
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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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}
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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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{
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if (png_ptr != NULL && info_ptr != NULL)
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#if defined(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
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return (info_ptr->x_pixels_per_unit);
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}
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#else
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return (0);
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#endif
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return (0);
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}
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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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{
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if (png_ptr != NULL && info_ptr != NULL)
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#if defined(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
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return (info_ptr->y_pixels_per_unit);
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}
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#else
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return (0);
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#endif
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return (0);
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}
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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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{
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if (png_ptr != NULL && info_ptr != NULL)
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#if defined(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
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return (info_ptr->x_pixels_per_unit);
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}
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#else
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return (0);
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#endif
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return (0);
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}
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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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{
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if (png_ptr != NULL && info_ptr != NULL)
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#if defined(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
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/(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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{
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if (png_ptr != NULL && info_ptr != NULL)
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#if defined(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
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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
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return (0);
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}
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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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{
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if (png_ptr != NULL && info_ptr != NULL)
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#if defined(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
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return (info_ptr->y_offset);
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}
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#else
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return (0);
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#endif
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return (0);
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}
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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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{
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if (png_ptr != NULL && info_ptr != NULL)
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#if defined(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
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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
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return (0);
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}
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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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{
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if (png_ptr != NULL && info_ptr != NULL)
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#if defined(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
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return (info_ptr->y_offset);
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}
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#else
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return (0);
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#endif
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return (0);
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}
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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)
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{
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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)
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{
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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)
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{
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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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312 |
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float PNGAPI
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png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
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{
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return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
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*.00003937);
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}
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319 |
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float PNGAPI
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png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
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{
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return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
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*.00003937);
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}
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326 |
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#if defined(PNG_pHYs_SUPPORTED)
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328 |
png_uint_32 PNGAPI
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png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
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png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
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{
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332 |
png_uint_32 retval = 0;
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333 |
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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)
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{
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*res_x = info_ptr->x_pixels_per_unit;
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retval |= PNG_INFO_pHYs;
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}
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342 |
if (res_y != NULL)
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{
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*res_y = info_ptr->y_pixels_per_unit;
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retval |= PNG_INFO_pHYs;
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}
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if (unit_type != NULL)
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{
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*unit_type = (int)info_ptr->phys_unit_type;
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retval |= PNG_INFO_pHYs;
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351 |
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);
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354 |
if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
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}
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}
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357 |
}
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358 |
return (retval);
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}
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360 |
#endif /* PNG_pHYs_SUPPORTED */
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361 |
#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
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362 |
|
|
|
363 |
/* png_get_channels really belongs in here, too, but it's been around longer */
|
|
|
364 |
|
|
|
365 |
#endif /* PNG_EASY_ACCESS_SUPPORTED */
|
|
|
366 |
|
|
|
367 |
png_byte PNGAPI
|
|
|
368 |
png_get_channels(png_structp png_ptr, png_infop info_ptr)
|
|
|
369 |
{
|
|
|
370 |
if (png_ptr != NULL && info_ptr != NULL)
|
|
|
371 |
return(info_ptr->channels);
|
|
|
372 |
else
|
|
|
373 |
return (0);
|
|
|
374 |
}
|
|
|
375 |
|
|
|
376 |
png_bytep PNGAPI
|
|
|
377 |
png_get_signature(png_structp png_ptr, png_infop info_ptr)
|
|
|
378 |
{
|
|
|
379 |
if (png_ptr != NULL && info_ptr != NULL)
|
|
|
380 |
return(info_ptr->signature);
|
|
|
381 |
else
|
|
|
382 |
return (NULL);
|
|
|
383 |
}
|
|
|
384 |
|
|
|
385 |
#if defined(PNG_bKGD_SUPPORTED)
|
|
|
386 |
png_uint_32 PNGAPI
|
|
|
387 |
png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
|
|
|
388 |
png_color_16p *background)
|
|
|
389 |
{
|
|
|
390 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
|
|
|
391 |
&& background != NULL)
|
|
|
392 |
{
|
|
|
393 |
png_debug1(1, "in %s retrieval function", "bKGD");
|
|
|
394 |
*background = &(info_ptr->background);
|
|
|
395 |
return (PNG_INFO_bKGD);
|
|
|
396 |
}
|
|
|
397 |
return (0);
|
|
|
398 |
}
|
|
|
399 |
#endif
|
|
|
400 |
|
|
|
401 |
#if defined(PNG_cHRM_SUPPORTED)
|
|
|
402 |
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
403 |
png_uint_32 PNGAPI
|
|
|
404 |
png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
|
|
|
405 |
double *white_x, double *white_y, double *red_x, double *red_y,
|
|
|
406 |
double *green_x, double *green_y, double *blue_x, double *blue_y)
|
|
|
407 |
{
|
|
|
408 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
|
|
|
409 |
{
|
|
|
410 |
png_debug1(1, "in %s retrieval function", "cHRM");
|
|
|
411 |
if (white_x != NULL)
|
|
|
412 |
*white_x = (double)info_ptr->x_white;
|
|
|
413 |
if (white_y != NULL)
|
|
|
414 |
*white_y = (double)info_ptr->y_white;
|
|
|
415 |
if (red_x != NULL)
|
|
|
416 |
*red_x = (double)info_ptr->x_red;
|
|
|
417 |
if (red_y != NULL)
|
|
|
418 |
*red_y = (double)info_ptr->y_red;
|
|
|
419 |
if (green_x != NULL)
|
|
|
420 |
*green_x = (double)info_ptr->x_green;
|
|
|
421 |
if (green_y != NULL)
|
|
|
422 |
*green_y = (double)info_ptr->y_green;
|
|
|
423 |
if (blue_x != NULL)
|
|
|
424 |
*blue_x = (double)info_ptr->x_blue;
|
|
|
425 |
if (blue_y != NULL)
|
|
|
426 |
*blue_y = (double)info_ptr->y_blue;
|
|
|
427 |
return (PNG_INFO_cHRM);
|
|
|
428 |
}
|
|
|
429 |
return (0);
|
|
|
430 |
}
|
|
|
431 |
#endif
|
|
|
432 |
#ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
433 |
png_uint_32 PNGAPI
|
|
|
434 |
png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
|
|
|
435 |
png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
|
|
|
436 |
png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
|
|
|
437 |
png_fixed_point *blue_x, png_fixed_point *blue_y)
|
|
|
438 |
{
|
|
|
439 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
|
|
|
440 |
{
|
|
|
441 |
png_debug1(1, "in %s retrieval function", "cHRM");
|
|
|
442 |
if (white_x != NULL)
|
|
|
443 |
*white_x = info_ptr->int_x_white;
|
|
|
444 |
if (white_y != NULL)
|
|
|
445 |
*white_y = info_ptr->int_y_white;
|
|
|
446 |
if (red_x != NULL)
|
|
|
447 |
*red_x = info_ptr->int_x_red;
|
|
|
448 |
if (red_y != NULL)
|
|
|
449 |
*red_y = info_ptr->int_y_red;
|
|
|
450 |
if (green_x != NULL)
|
|
|
451 |
*green_x = info_ptr->int_x_green;
|
|
|
452 |
if (green_y != NULL)
|
|
|
453 |
*green_y = info_ptr->int_y_green;
|
|
|
454 |
if (blue_x != NULL)
|
|
|
455 |
*blue_x = info_ptr->int_x_blue;
|
|
|
456 |
if (blue_y != NULL)
|
|
|
457 |
*blue_y = info_ptr->int_y_blue;
|
|
|
458 |
return (PNG_INFO_cHRM);
|
|
|
459 |
}
|
|
|
460 |
return (0);
|
|
|
461 |
}
|
|
|
462 |
#endif
|
|
|
463 |
#endif
|
|
|
464 |
|
|
|
465 |
#if defined(PNG_gAMA_SUPPORTED)
|
|
|
466 |
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
467 |
png_uint_32 PNGAPI
|
|
|
468 |
png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
|
|
|
469 |
{
|
|
|
470 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
|
|
|
471 |
&& file_gamma != NULL)
|
|
|
472 |
{
|
|
|
473 |
png_debug1(1, "in %s retrieval function", "gAMA");
|
|
|
474 |
*file_gamma = (double)info_ptr->gamma;
|
|
|
475 |
return (PNG_INFO_gAMA);
|
|
|
476 |
}
|
|
|
477 |
return (0);
|
|
|
478 |
}
|
|
|
479 |
#endif
|
|
|
480 |
#ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
481 |
png_uint_32 PNGAPI
|
|
|
482 |
png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
|
|
|
483 |
png_fixed_point *int_file_gamma)
|
|
|
484 |
{
|
|
|
485 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
|
|
|
486 |
&& int_file_gamma != NULL)
|
|
|
487 |
{
|
|
|
488 |
png_debug1(1, "in %s retrieval function", "gAMA");
|
|
|
489 |
*int_file_gamma = info_ptr->int_gamma;
|
|
|
490 |
return (PNG_INFO_gAMA);
|
|
|
491 |
}
|
|
|
492 |
return (0);
|
|
|
493 |
}
|
|
|
494 |
#endif
|
|
|
495 |
#endif
|
|
|
496 |
|
|
|
497 |
#if defined(PNG_sRGB_SUPPORTED)
|
|
|
498 |
png_uint_32 PNGAPI
|
|
|
499 |
png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
|
|
|
500 |
{
|
|
|
501 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
|
|
|
502 |
&& file_srgb_intent != NULL)
|
|
|
503 |
{
|
|
|
504 |
png_debug1(1, "in %s retrieval function", "sRGB");
|
|
|
505 |
*file_srgb_intent = (int)info_ptr->srgb_intent;
|
|
|
506 |
return (PNG_INFO_sRGB);
|
|
|
507 |
}
|
|
|
508 |
return (0);
|
|
|
509 |
}
|
|
|
510 |
#endif
|
|
|
511 |
|
|
|
512 |
#if defined(PNG_iCCP_SUPPORTED)
|
|
|
513 |
png_uint_32 PNGAPI
|
|
|
514 |
png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
|
|
|
515 |
png_charpp name, int *compression_type,
|
|
|
516 |
png_charpp profile, png_uint_32 *proflen)
|
|
|
517 |
{
|
|
|
518 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
|
|
|
519 |
&& name != NULL && profile != NULL && proflen != NULL)
|
|
|
520 |
{
|
|
|
521 |
png_debug1(1, "in %s retrieval function", "iCCP");
|
|
|
522 |
*name = info_ptr->iccp_name;
|
|
|
523 |
*profile = info_ptr->iccp_profile;
|
|
|
524 |
/* Compression_type is a dummy so the API won't have to change
|
|
|
525 |
* if we introduce multiple compression types later.
|
|
|
526 |
*/
|
|
|
527 |
*proflen = (int)info_ptr->iccp_proflen;
|
|
|
528 |
*compression_type = (int)info_ptr->iccp_compression;
|
|
|
529 |
return (PNG_INFO_iCCP);
|
|
|
530 |
}
|
|
|
531 |
return (0);
|
|
|
532 |
}
|
|
|
533 |
#endif
|
|
|
534 |
|
|
|
535 |
#if defined(PNG_sPLT_SUPPORTED)
|
|
|
536 |
png_uint_32 PNGAPI
|
|
|
537 |
png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
|
|
|
538 |
png_sPLT_tpp spalettes)
|
|
|
539 |
{
|
|
|
540 |
if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
|
|
|
541 |
{
|
|
|
542 |
*spalettes = info_ptr->splt_palettes;
|
|
|
543 |
return ((png_uint_32)info_ptr->splt_palettes_num);
|
|
|
544 |
}
|
|
|
545 |
return (0);
|
|
|
546 |
}
|
|
|
547 |
#endif
|
|
|
548 |
|
|
|
549 |
#if defined(PNG_hIST_SUPPORTED)
|
|
|
550 |
png_uint_32 PNGAPI
|
|
|
551 |
png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
|
|
|
552 |
{
|
|
|
553 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
|
|
|
554 |
&& hist != NULL)
|
|
|
555 |
{
|
|
|
556 |
png_debug1(1, "in %s retrieval function", "hIST");
|
|
|
557 |
*hist = info_ptr->hist;
|
|
|
558 |
return (PNG_INFO_hIST);
|
|
|
559 |
}
|
|
|
560 |
return (0);
|
|
|
561 |
}
|
|
|
562 |
#endif
|
|
|
563 |
|
|
|
564 |
png_uint_32 PNGAPI
|
|
|
565 |
png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
|
|
|
566 |
png_uint_32 *width, png_uint_32 *height, int *bit_depth,
|
|
|
567 |
int *color_type, int *interlace_type, int *compression_type,
|
|
|
568 |
int *filter_type)
|
|
|
569 |
|
|
|
570 |
{
|
|
|
571 |
if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
|
|
|
572 |
bit_depth != NULL && color_type != NULL)
|
|
|
573 |
{
|
|
|
574 |
png_debug1(1, "in %s retrieval function", "IHDR");
|
|
|
575 |
*width = info_ptr->width;
|
|
|
576 |
*height = info_ptr->height;
|
|
|
577 |
*bit_depth = info_ptr->bit_depth;
|
|
|
578 |
if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16)
|
|
|
579 |
png_error(png_ptr, "Invalid bit depth");
|
|
|
580 |
|
|
|
581 |
*color_type = info_ptr->color_type;
|
|
|
582 |
|
|
|
583 |
if (info_ptr->color_type > 6)
|
|
|
584 |
png_error(png_ptr, "Invalid color type");
|
|
|
585 |
|
|
|
586 |
if (compression_type != NULL)
|
|
|
587 |
*compression_type = info_ptr->compression_type;
|
|
|
588 |
|
|
|
589 |
if (filter_type != NULL)
|
|
|
590 |
*filter_type = info_ptr->filter_type;
|
|
|
591 |
|
|
|
592 |
if (interlace_type != NULL)
|
|
|
593 |
*interlace_type = info_ptr->interlace_type;
|
|
|
594 |
|
|
|
595 |
/* Check for potential overflow of rowbytes */
|
|
|
596 |
if (*width == 0 || *width > PNG_UINT_31_MAX)
|
|
|
597 |
png_error(png_ptr, "Invalid image width");
|
|
|
598 |
|
|
|
599 |
if (*height == 0 || *height > PNG_UINT_31_MAX)
|
|
|
600 |
png_error(png_ptr, "Invalid image height");
|
|
|
601 |
|
|
|
602 |
if (info_ptr->width > (PNG_UINT_32_MAX
|
|
|
603 |
>> 3) /* 8-byte RGBA pixels */
|
|
|
604 |
- 64 /* bigrowbuf hack */
|
|
|
605 |
- 1 /* filter byte */
|
|
|
606 |
- 7*8 /* rounding of width to multiple of 8 pixels */
|
|
|
607 |
- 8) /* extra max_pixel_depth pad */
|
|
|
608 |
{
|
|
|
609 |
png_warning(png_ptr,
|
|
|
610 |
"Width too large for libpng to process image data.");
|
|
|
611 |
}
|
|
|
612 |
|
|
|
613 |
return (1);
|
|
|
614 |
}
|
|
|
615 |
return (0);
|
|
|
616 |
}
|
|
|
617 |
|
|
|
618 |
#if defined(PNG_oFFs_SUPPORTED)
|
|
|
619 |
png_uint_32 PNGAPI
|
|
|
620 |
png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
|
|
|
621 |
png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
|
|
|
622 |
{
|
|
|
623 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
|
|
|
624 |
&& offset_x != NULL && offset_y != NULL && unit_type != NULL)
|
|
|
625 |
{
|
|
|
626 |
png_debug1(1, "in %s retrieval function", "oFFs");
|
|
|
627 |
*offset_x = info_ptr->x_offset;
|
|
|
628 |
*offset_y = info_ptr->y_offset;
|
|
|
629 |
*unit_type = (int)info_ptr->offset_unit_type;
|
|
|
630 |
return (PNG_INFO_oFFs);
|
|
|
631 |
}
|
|
|
632 |
return (0);
|
|
|
633 |
}
|
|
|
634 |
#endif
|
|
|
635 |
|
|
|
636 |
#if defined(PNG_pCAL_SUPPORTED)
|
|
|
637 |
png_uint_32 PNGAPI
|
|
|
638 |
png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
|
|
|
639 |
png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
|
|
|
640 |
png_charp *units, png_charpp *params)
|
|
|
641 |
{
|
|
|
642 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
|
|
|
643 |
&& purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
|
|
|
644 |
nparams != NULL && units != NULL && params != NULL)
|
|
|
645 |
{
|
|
|
646 |
png_debug1(1, "in %s retrieval function", "pCAL");
|
|
|
647 |
*purpose = info_ptr->pcal_purpose;
|
|
|
648 |
*X0 = info_ptr->pcal_X0;
|
|
|
649 |
*X1 = info_ptr->pcal_X1;
|
|
|
650 |
*type = (int)info_ptr->pcal_type;
|
|
|
651 |
*nparams = (int)info_ptr->pcal_nparams;
|
|
|
652 |
*units = info_ptr->pcal_units;
|
|
|
653 |
*params = info_ptr->pcal_params;
|
|
|
654 |
return (PNG_INFO_pCAL);
|
|
|
655 |
}
|
|
|
656 |
return (0);
|
|
|
657 |
}
|
|
|
658 |
#endif
|
|
|
659 |
|
|
|
660 |
#if defined(PNG_sCAL_SUPPORTED)
|
|
|
661 |
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
|
|
662 |
png_uint_32 PNGAPI
|
|
|
663 |
png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
|
|
|
664 |
int *unit, double *width, double *height)
|
|
|
665 |
{
|
|
|
666 |
if (png_ptr != NULL && info_ptr != NULL &&
|
|
|
667 |
(info_ptr->valid & PNG_INFO_sCAL))
|
|
|
668 |
{
|
|
|
669 |
*unit = info_ptr->scal_unit;
|
|
|
670 |
*width = info_ptr->scal_pixel_width;
|
|
|
671 |
*height = info_ptr->scal_pixel_height;
|
|
|
672 |
return (PNG_INFO_sCAL);
|
|
|
673 |
}
|
|
|
674 |
return(0);
|
|
|
675 |
}
|
|
|
676 |
#else
|
|
|
677 |
#ifdef PNG_FIXED_POINT_SUPPORTED
|
|
|
678 |
png_uint_32 PNGAPI
|
|
|
679 |
png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
|
|
|
680 |
int *unit, png_charpp width, png_charpp height)
|
|
|
681 |
{
|
|
|
682 |
if (png_ptr != NULL && info_ptr != NULL &&
|
|
|
683 |
(info_ptr->valid & PNG_INFO_sCAL))
|
|
|
684 |
{
|
|
|
685 |
*unit = info_ptr->scal_unit;
|
|
|
686 |
*width = info_ptr->scal_s_width;
|
|
|
687 |
*height = info_ptr->scal_s_height;
|
|
|
688 |
return (PNG_INFO_sCAL);
|
|
|
689 |
}
|
|
|
690 |
return(0);
|
|
|
691 |
}
|
|
|
692 |
#endif
|
|
|
693 |
#endif
|
|
|
694 |
#endif
|
|
|
695 |
|
|
|
696 |
#if defined(PNG_pHYs_SUPPORTED)
|
|
|
697 |
png_uint_32 PNGAPI
|
|
|
698 |
png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
|
|
|
699 |
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
|
|
|
700 |
{
|
|
|
701 |
png_uint_32 retval = 0;
|
|
|
702 |
|
|
|
703 |
if (png_ptr != NULL && info_ptr != NULL &&
|
|
|
704 |
(info_ptr->valid & PNG_INFO_pHYs))
|
|
|
705 |
{
|
|
|
706 |
png_debug1(1, "in %s retrieval function", "pHYs");
|
|
|
707 |
|
|
|
708 |
if (res_x != NULL)
|
|
|
709 |
{
|
|
|
710 |
*res_x = info_ptr->x_pixels_per_unit;
|
|
|
711 |
retval |= PNG_INFO_pHYs;
|
|
|
712 |
}
|
|
|
713 |
|
|
|
714 |
if (res_y != NULL)
|
|
|
715 |
{
|
|
|
716 |
*res_y = info_ptr->y_pixels_per_unit;
|
|
|
717 |
retval |= PNG_INFO_pHYs;
|
|
|
718 |
}
|
|
|
719 |
|
|
|
720 |
if (unit_type != NULL)
|
|
|
721 |
{
|
|
|
722 |
*unit_type = (int)info_ptr->phys_unit_type;
|
|
|
723 |
retval |= PNG_INFO_pHYs;
|
|
|
724 |
}
|
|
|
725 |
}
|
|
|
726 |
return (retval);
|
|
|
727 |
}
|
|
|
728 |
#endif
|
|
|
729 |
|
|
|
730 |
png_uint_32 PNGAPI
|
|
|
731 |
png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
|
|
|
732 |
int *num_palette)
|
|
|
733 |
{
|
|
|
734 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
|
|
|
735 |
&& palette != NULL)
|
|
|
736 |
{
|
|
|
737 |
png_debug1(1, "in %s retrieval function", "PLTE");
|
|
|
738 |
*palette = info_ptr->palette;
|
|
|
739 |
*num_palette = info_ptr->num_palette;
|
|
|
740 |
png_debug1(3, "num_palette = %d", *num_palette);
|
|
|
741 |
return (PNG_INFO_PLTE);
|
|
|
742 |
}
|
|
|
743 |
return (0);
|
|
|
744 |
}
|
|
|
745 |
|
|
|
746 |
#if defined(PNG_sBIT_SUPPORTED)
|
|
|
747 |
png_uint_32 PNGAPI
|
|
|
748 |
png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
|
|
|
749 |
{
|
|
|
750 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
|
|
|
751 |
&& sig_bit != NULL)
|
|
|
752 |
{
|
|
|
753 |
png_debug1(1, "in %s retrieval function", "sBIT");
|
|
|
754 |
*sig_bit = &(info_ptr->sig_bit);
|
|
|
755 |
return (PNG_INFO_sBIT);
|
|
|
756 |
}
|
|
|
757 |
return (0);
|
|
|
758 |
}
|
|
|
759 |
#endif
|
|
|
760 |
|
|
|
761 |
#if defined(PNG_TEXT_SUPPORTED)
|
|
|
762 |
png_uint_32 PNGAPI
|
|
|
763 |
png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
|
|
|
764 |
int *num_text)
|
|
|
765 |
{
|
|
|
766 |
if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
|
|
|
767 |
{
|
|
|
768 |
png_debug1(1, "in %s retrieval function",
|
|
|
769 |
(png_ptr->chunk_name[0] == '\0' ? "text"
|
|
|
770 |
: (png_const_charp)png_ptr->chunk_name));
|
|
|
771 |
|
|
|
772 |
if (text_ptr != NULL)
|
|
|
773 |
*text_ptr = info_ptr->text;
|
|
|
774 |
|
|
|
775 |
if (num_text != NULL)
|
|
|
776 |
*num_text = info_ptr->num_text;
|
|
|
777 |
|
|
|
778 |
return ((png_uint_32)info_ptr->num_text);
|
|
|
779 |
}
|
|
|
780 |
if (num_text != NULL)
|
|
|
781 |
*num_text = 0;
|
|
|
782 |
return(0);
|
|
|
783 |
}
|
|
|
784 |
#endif
|
|
|
785 |
|
|
|
786 |
#if defined(PNG_tIME_SUPPORTED)
|
|
|
787 |
png_uint_32 PNGAPI
|
|
|
788 |
png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
|
|
|
789 |
{
|
|
|
790 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
|
|
|
791 |
&& mod_time != NULL)
|
|
|
792 |
{
|
|
|
793 |
png_debug1(1, "in %s retrieval function", "tIME");
|
|
|
794 |
*mod_time = &(info_ptr->mod_time);
|
|
|
795 |
return (PNG_INFO_tIME);
|
|
|
796 |
}
|
|
|
797 |
return (0);
|
|
|
798 |
}
|
|
|
799 |
#endif
|
|
|
800 |
|
|
|
801 |
#if defined(PNG_tRNS_SUPPORTED)
|
|
|
802 |
png_uint_32 PNGAPI
|
|
|
803 |
png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
|
|
|
804 |
png_bytep *trans, int *num_trans, png_color_16p *trans_values)
|
|
|
805 |
{
|
|
|
806 |
png_uint_32 retval = 0;
|
|
|
807 |
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
|
|
|
808 |
{
|
|
|
809 |
png_debug1(1, "in %s retrieval function", "tRNS");
|
|
|
810 |
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
|
|
|
811 |
{
|
|
|
812 |
if (trans != NULL)
|
|
|
813 |
{
|
|
|
814 |
*trans = info_ptr->trans;
|
|
|
815 |
retval |= PNG_INFO_tRNS;
|
|
|
816 |
}
|
|
|
817 |
|
|
|
818 |
if (trans_values != NULL)
|
|
|
819 |
*trans_values = &(info_ptr->trans_values);
|
|
|
820 |
}
|
|
|
821 |
else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
|
|
|
822 |
{
|
|
|
823 |
if (trans_values != NULL)
|
|
|
824 |
{
|
|
|
825 |
*trans_values = &(info_ptr->trans_values);
|
|
|
826 |
retval |= PNG_INFO_tRNS;
|
|
|
827 |
}
|
|
|
828 |
|
|
|
829 |
if (trans != NULL)
|
|
|
830 |
*trans = NULL;
|
|
|
831 |
}
|
|
|
832 |
if (num_trans != NULL)
|
|
|
833 |
{
|
|
|
834 |
*num_trans = info_ptr->num_trans;
|
|
|
835 |
retval |= PNG_INFO_tRNS;
|
|
|
836 |
}
|
|
|
837 |
}
|
|
|
838 |
return (retval);
|
|
|
839 |
}
|
|
|
840 |
#endif
|
|
|
841 |
|
|
|
842 |
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
|
|
843 |
png_uint_32 PNGAPI
|
|
|
844 |
png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
|
|
|
845 |
png_unknown_chunkpp unknowns)
|
|
|
846 |
{
|
|
|
847 |
if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
|
|
|
848 |
{
|
|
|
849 |
*unknowns = info_ptr->unknown_chunks;
|
|
|
850 |
return ((png_uint_32)info_ptr->unknown_chunks_num);
|
|
|
851 |
}
|
|
|
852 |
return (0);
|
|
|
853 |
}
|
|
|
854 |
#endif
|
|
|
855 |
|
|
|
856 |
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
|
|
|
857 |
png_byte PNGAPI
|
|
|
858 |
png_get_rgb_to_gray_status (png_structp png_ptr)
|
|
|
859 |
{
|
|
|
860 |
return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
|
|
|
861 |
}
|
|
|
862 |
#endif
|
|
|
863 |
|
|
|
864 |
#if defined(PNG_USER_CHUNKS_SUPPORTED)
|
|
|
865 |
png_voidp PNGAPI
|
|
|
866 |
png_get_user_chunk_ptr(png_structp png_ptr)
|
|
|
867 |
{
|
|
|
868 |
return (png_ptr? png_ptr->user_chunk_ptr : NULL);
|
|
|
869 |
}
|
|
|
870 |
#endif
|
|
|
871 |
|
|
|
872 |
#ifdef PNG_WRITE_SUPPORTED
|
|
|
873 |
png_uint_32 PNGAPI
|
|
|
874 |
png_get_compression_buffer_size(png_structp png_ptr)
|
|
|
875 |
{
|
|
|
876 |
return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
|
|
|
877 |
}
|
|
|
878 |
#endif
|
|
|
879 |
|
|
|
880 |
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
|
|
881 |
#ifndef PNG_1_0_X
|
|
|
882 |
/* This function was added to libpng 1.2.0 and should exist by default */
|
|
|
883 |
png_uint_32 PNGAPI
|
|
|
884 |
png_get_asm_flags (png_structp png_ptr)
|
|
|
885 |
{
|
|
|
886 |
/* Obsolete, to be removed from libpng-1.4.0 */
|
|
|
887 |
return (png_ptr? 0L: 0L);
|
|
|
888 |
}
|
|
|
889 |
|
|
|
890 |
/* This function was added to libpng 1.2.0 and should exist by default */
|
|
|
891 |
png_uint_32 PNGAPI
|
|
|
892 |
png_get_asm_flagmask (int flag_select)
|
|
|
893 |
{
|
|
|
894 |
/* Obsolete, to be removed from libpng-1.4.0 */
|
|
|
895 |
flag_select=flag_select;
|
|
|
896 |
return 0L;
|
|
|
897 |
}
|
|
|
898 |
|
|
|
899 |
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
|
|
|
900 |
/* This function was added to libpng 1.2.0 */
|
|
|
901 |
png_uint_32 PNGAPI
|
|
|
902 |
png_get_mmx_flagmask (int flag_select, int *compilerID)
|
|
|
903 |
{
|
|
|
904 |
/* Obsolete, to be removed from libpng-1.4.0 */
|
|
|
905 |
flag_select=flag_select;
|
|
|
906 |
*compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
|
|
|
907 |
return 0L;
|
|
|
908 |
}
|
|
|
909 |
|
|
|
910 |
/* This function was added to libpng 1.2.0 */
|
|
|
911 |
png_byte PNGAPI
|
|
|
912 |
png_get_mmx_bitdepth_threshold (png_structp png_ptr)
|
|
|
913 |
{
|
|
|
914 |
/* Obsolete, to be removed from libpng-1.4.0 */
|
|
|
915 |
return (png_ptr? 0: 0);
|
|
|
916 |
}
|
|
|
917 |
|
|
|
918 |
/* This function was added to libpng 1.2.0 */
|
|
|
919 |
png_uint_32 PNGAPI
|
|
|
920 |
png_get_mmx_rowbytes_threshold (png_structp png_ptr)
|
|
|
921 |
{
|
|
|
922 |
/* Obsolete, to be removed from libpng-1.4.0 */
|
|
|
923 |
return (png_ptr? 0L: 0L);
|
|
|
924 |
}
|
|
|
925 |
#endif /* ?PNG_1_0_X */
|
|
|
926 |
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
927 |
|
|
|
928 |
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
|
|
|
929 |
/* These functions were added to libpng 1.2.6 */
|
|
|
930 |
png_uint_32 PNGAPI
|
|
|
931 |
png_get_user_width_max (png_structp png_ptr)
|
|
|
932 |
{
|
|
|
933 |
return (png_ptr? png_ptr->user_width_max : 0);
|
|
|
934 |
}
|
|
|
935 |
png_uint_32 PNGAPI
|
|
|
936 |
png_get_user_height_max (png_structp png_ptr)
|
|
|
937 |
{
|
|
|
938 |
return (png_ptr? png_ptr->user_height_max : 0);
|
|
|
939 |
}
|
|
|
940 |
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
|
|
|
941 |
|
|
|
942 |
|
|
|
943 |
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|