37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
#include <stdio.h>
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// PNG File Struct
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struct PNG_START_FILE_STRUCT {
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unsigned char file_sig[8];
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unsigned char ihdr_length[4];
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unsigned char ihdr_header[4];
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unsigned char file_width[4];
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unsigned char file_height[4];
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unsigned char bit_depth[1];
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unsigned char color_type[1];
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unsigned char compression_method[1];
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unsigned char filter_method[1];
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unsigned char interlace_method[1];
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unsigned char ihdr_crc[4];
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};
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struct PNG_IDAT_FILE_STRUCT {
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unsigned char idat_length[4];
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unsigned char idat_header[4];
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unsigned char idat_crc[4];
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unsigned char idat_data[];
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};
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struct PNG_FILE_STRUCT {
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struct PNG_START_FILE_STRUCT png_start_data;
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};
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extern const long png_signature[8];
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int check_header_length(unsigned char *addr, long offset);
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int check_file_header(char *addr);
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int create_cc_file(unsigned char *addr, unsigned long file_length);
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unsigned char* file_to_char_array(FILE *in_file, size_t* size);
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void populate_start_png(unsigned char *addr, struct PNG_START_FILE_STRUCT *png_data);
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void populate_idat_png(unsigned char *addr, struct PNG_IDAT_FILE_STRUCT *png_data, unsigned long offset);
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