125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
/*---------------------------------------------------------------------------
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pngquant: RGBA -> RGBA-palette quantization program rwpng.h
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---------------------------------------------------------------------------
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© 1998-2000 by Greg Roelofs.
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© 2009-2014 by Kornel Lesiński.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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---------------------------------------------------------------------------*/
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#ifndef RWPNG_H
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#define RWPNG_H
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#include "png.h" /* if this include fails, you need to install libpng (e.g. libpng-devel package) */
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#include <setjmp.h>
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#ifndef USE_COCOA
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#define USE_COCOA 0
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#endif
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typedef enum {
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SUCCESS = 0,
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MISSING_ARGUMENT = 1,
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READ_ERROR = 2,
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INVALID_ARGUMENT = 4,
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NOT_OVERWRITING_ERROR = 15,
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CANT_WRITE_ERROR = 16,
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OUT_OF_MEMORY_ERROR = 17,
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WRONG_ARCHITECTURE = 18, // Missing SSE
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PNG_OUT_OF_MEMORY_ERROR = 24,
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LIBPNG_FATAL_ERROR = 25,
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LIBPNG_INIT_ERROR = 35,
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TOO_LARGE_FILE = 98,
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TOO_LOW_QUALITY = 99,
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} pngquant_error;
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struct rwpng_chunk {
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struct rwpng_chunk *next;
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png_byte *data;
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png_size_t size;
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png_byte name[5];
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png_byte location;
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};
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#if USE_LCMS
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typedef enum {
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NONE = 0,
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ICCP = 1, // used ICC profile
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ICCP_WARN_GRAY = 2, // ignore and warn about GRAY ICC profile
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GAMA_CHRM = 3, // used gAMA and cHARM
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} lcms_transform;
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#endif
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typedef struct {
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jmp_buf jmpbuf;
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png_uint_32 width;
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png_uint_32 height;
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png_size_t file_size;
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double gamma;
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unsigned char **row_pointers;
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unsigned char *rgba_data;
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struct rwpng_chunk *chunks;
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#if USE_LCMS
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lcms_transform lcms_status;
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#endif
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} png24_image;
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typedef struct {
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jmp_buf jmpbuf;
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png_uint_32 width;
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png_uint_32 height;
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png_size_t maximum_file_size;
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double gamma;
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unsigned char **row_pointers;
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unsigned char *indexed_data;
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unsigned int num_palette;
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unsigned int num_trans;
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png_color palette[256];
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unsigned char trans[256];
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struct rwpng_chunk *chunks;
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char fast_compression;
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} png8_image;
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typedef union {
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jmp_buf jmpbuf;
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png24_image png24;
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png8_image png8;
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} rwpng_png_image;
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/* prototypes for public functions in rwpng.c */
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void rwpng_version_info(FILE *fp);
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pngquant_error rwpng_read_image24(FILE *infile, png24_image *mainprog_ptr, int verbose);
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pngquant_error rwpng_write_image8(FILE *outfile, png8_image *mainprog_ptr);
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pngquant_error rwpng_write_image24(FILE *outfile, png24_image *mainprog_ptr);
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void rwpng_free_image24(png24_image *);
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void rwpng_free_image8(png8_image *);
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#endif
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