65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
#pragma once
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#include <stdint.h>
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#define EXTENSION_INTRODUCER 0x21
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#define IMAGE_DESCRIPTOR 0x2C
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#define TRAILER 0x3B
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#define GRAPHIC_CONTROL 0xF9
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#define APPLICATION_EXTENSION 0xFF
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#define COMMENT_EXTENSION 0xFE
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#define PLAINTEXT_EXTENSION 0x01
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#define READ(dst, size) memcpy(dst, buffer, size); buffer += size
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typedef struct {
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unsigned short width;
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unsigned short height;
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unsigned char fields;
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unsigned char background_color_index;
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unsigned char pixel_aspect_ratio;
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} screen_descriptor_t;
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typedef struct {
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unsigned char r, g, b;
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} rgb;
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typedef struct {
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unsigned short image_left_position;
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unsigned short image_top_position;
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unsigned short image_width;
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unsigned short image_height;
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unsigned char fields;
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} image_descriptor_t;
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typedef struct {
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unsigned char byte;
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int prev;
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int len;
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} dictionary_entry_t;
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typedef struct {
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unsigned char extension_code;
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unsigned char block_size;
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} extension_t;
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typedef struct {
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unsigned char fields;
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unsigned short delay_time;
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unsigned char transparent_color_index;
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} graphic_control_extension_t;
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typedef struct {
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unsigned char application_id[8];
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unsigned char version[3];
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} application_extension_t;
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typedef struct {
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unsigned short left, top, width, height;
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unsigned char cell_width, cell_height;
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unsigned char foreground_color, background_color;
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} plaintext_extension_t;
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void uncompress(int code_length, const unsigned char *input, int input_length, unsigned char *out);
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uint32_t* LoadPalette(unsigned char *buffer);
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unsigned char* LoadGif(unsigned char *buffer, unsigned short* w, unsigned short* h); |