mirror of
https://github.com/holub/mame
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ee9f88963c
- removed years from copyright notices - removed redundant (c) from copyright notices - updated "the MAME Team" to be "Nicola Salmoria and the MAME Team"
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/***************************************************************************
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png.h
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PNG file management.
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Copyright Nicola Salmoria and the MAME Team.
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Visit http://mamedev.org for licensing and usage restrictions.
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***************************************************************************/
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#pragma once
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#ifndef __PNG_H__
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#define __PNG_H__
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#include "osdcore.h"
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#include "bitmap.h"
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#include "corefile.h"
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/***************************************************************************
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CONSTANTS
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***************************************************************************/
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#define PNG_Signature "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A"
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#define MNG_Signature "\x8A\x4D\x4E\x47\x0D\x0A\x1A\x0A"
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/* Chunk names */
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#define PNG_CN_IHDR 0x49484452L
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#define PNG_CN_PLTE 0x504C5445L
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#define PNG_CN_IDAT 0x49444154L
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#define PNG_CN_IEND 0x49454E44L
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#define PNG_CN_gAMA 0x67414D41L
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#define PNG_CN_sBIT 0x73424954L
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#define PNG_CN_cHRM 0x6348524DL
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#define PNG_CN_tRNS 0x74524E53L
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#define PNG_CN_bKGD 0x624B4744L
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#define PNG_CN_hIST 0x68495354L
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#define PNG_CN_tEXt 0x74455874L
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#define PNG_CN_zTXt 0x7A545874L
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#define PNG_CN_pHYs 0x70485973L
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#define PNG_CN_oFFs 0x6F464673L
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#define PNG_CN_tIME 0x74494D45L
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#define PNG_CN_sCAL 0x7343414CL
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/* MNG Chunk names */
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#define MNG_CN_MHDR 0x4D484452L
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#define MNG_CN_MEND 0x4D454E44L
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#define MNG_CN_TERM 0x5445524DL
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#define MNG_CN_BACK 0x4241434BL
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/* Prediction filters */
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#define PNG_PF_None 0
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#define PNG_PF_Sub 1
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#define PNG_PF_Up 2
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#define PNG_PF_Average 3
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#define PNG_PF_Paeth 4
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/* Error types */
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enum _png_error
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{
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PNGERR_NONE,
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PNGERR_OUT_OF_MEMORY,
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PNGERR_UNKNOWN_FILTER,
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PNGERR_FILE_ERROR,
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PNGERR_BAD_SIGNATURE,
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PNGERR_DECOMPRESS_ERROR,
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PNGERR_FILE_TRUNCATED,
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PNGERR_FILE_CORRUPT,
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PNGERR_UNKNOWN_CHUNK,
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PNGERR_COMPRESS_ERROR,
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PNGERR_UNSUPPORTED_FORMAT
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};
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typedef enum _png_error png_error;
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/***************************************************************************
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TYPE DEFINITIONS
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***************************************************************************/
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typedef struct _png_text png_text;
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struct _png_text
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{
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png_text * next;
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const char * keyword; /* this is allocated */
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const char * text; /* this points to a part of keyword */
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};
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typedef struct _png_info png_info;
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struct _png_info
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{
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UINT8 * image;
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UINT32 width, height;
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UINT32 xres, yres;
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rectangle screen;
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double xscale, yscale;
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double source_gamma;
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UINT32 resolution_unit;
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UINT8 bit_depth;
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UINT8 color_type;
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UINT8 compression_method;
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UINT8 filter_method;
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UINT8 interlace_method;
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UINT8 * palette;
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UINT32 num_palette;
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UINT8 * trans;
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UINT32 num_trans;
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png_text * textlist;
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};
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/***************************************************************************
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FUNCTION PROTOTYPES
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***************************************************************************/
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void png_free(png_info *pnginfo);
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png_error png_read_file(core_file *fp, png_info *pnginfo);
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png_error png_read_bitmap(core_file *fp, bitmap_t **bitmap);
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png_error png_expand_buffer_8bit(png_info *p);
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png_error png_add_text(png_info *pnginfo, const char *keyword, const char *text);
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png_error png_write_bitmap(core_file *fp, png_info *info, bitmap_t *bitmap, int palette_length, const UINT32 *palette);
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png_error mng_capture_start(core_file *fp, bitmap_t *bitmap, double rate);
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png_error mng_capture_frame(core_file *fp, png_info *info, bitmap_t *bitmap, int palette_length, const UINT32 *palette);
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png_error mng_capture_stop(core_file *fp);
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#endif /* __PNG_H__ */
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