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43 lines
1020 B
C
43 lines
1020 B
C
#ifndef __PNGU_I__
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#define __PNGU_I__
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#include "png.h"
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// Constants
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#define PNGU_SOURCE_BUFFER 1
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#define PNGU_SOURCE_DEVICE 2
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// Prototypes of helper functions
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int pngu_info (IMGCTX ctx);
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int pngu_decode (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, PNGU_u32 stripAlpha);
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int pngu_decode_add_alpha (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, PNGU_u32 stripAlpha, int force32bit);
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void pngu_free_info (IMGCTX ctx);
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void pngu_read_data_from_buffer (png_structp png_ptr, png_bytep data, png_size_t length);
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void pngu_write_data_to_buffer (png_structp png_ptr, png_bytep data, png_size_t length);
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void pngu_flush_data_to_buffer (png_structp png_ptr);
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int pngu_clamp (int value, int min, int max);
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// PNGU Image context struct
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struct _IMGCTX
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{
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int source;
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void *buffer;
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char *filename;
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PNGU_u32 cursor;
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PNGU_u32 buf_size; // buffer size
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PNGU_u32 propRead;
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PNGUPROP prop;
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PNGU_u32 infoRead;
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png_structp png_ptr;
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png_infop info_ptr;
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FILE *fd;
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png_bytep *row_pointers;
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png_bytep img_data;
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};
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#endif
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