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#ifndef BMP_H_
#define BMP_H_
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <stdlib.h>
#include <tinyff/result.h>
#include <tinyff/stream.h>
#include <tinyff/image/generic.h>
#include <tinyff/tinyff.h>
#define FF_BMP_HEADER_SIZE 14
#define FF_BMP_INFO_SIZE 40
#define FF_BMP_COLOR_TABLE_SIZE(bpp, clrused) \
((bpp) <= 8 ? (4 * ((clrused) ? (clrused) : (1u << (bpp)))) : 0)
static const unsigned char BMP_SIGNATURE[2] = {
'B', 'M'
};
typedef struct {
FF_BASE
// Raw stream handle
ff_stream *raw;
uint32_t file_size; // tbh, i actually have no idea why this is needed
uint32_t data_offset;
uint32_t width;
uint32_t height;
uint16_t bpp;
uint32_t compression;
uint32_t image_size;
uint32_t x_ppm; // X pixels per meter
uint32_t y_ppm; // Y pixels per meter
uint32_t colors_used;
uint32_t important_colors;
uint8_t* palette;
uint8_t* pixels;
} ff_bmp_ctx;
typedef ff_result (*ff_bmp_section_handler_ptr)(ff_ctx* ctx, uint8_t *buf, size_t len, ff_bmp_ctx* bmp_ctx);
typedef struct {
// Even though the types in bitmaps are invisible (they don't have labels)
// I'll just keep them in for the sake of being in
// And I might just handle the section looping a bit differently
// And their names will be what I saw in the spec
const char* type;
ff_bmp_section_handler_ptr handler;
} ff_bmp_section_handler;
ff_result ff_bmp_header_handler(ff_ctx* ctx, uint8_t *buf, size_t len, ff_bmp_ctx* bmp_ctx);
ff_result ff_bmp_info_handler(ff_ctx* ctx, uint8_t *buf, size_t len, ff_bmp_ctx* bmp_ctx);
ff_result ff_bmp_color_handler(ff_ctx* ctx, uint8_t *buf, size_t len, ff_bmp_ctx* bmp_ctx);
ff_result ff_bmp_data_handler(ff_ctx* ctx, uint8_t *buf, size_t len, ff_bmp_ctx* bmp_ctx);
const ff_bmp_section_handler ff_bmp_section_handlers[] = {
{"Header", ff_bmp_header_handler},
{"InfoHeader", ff_bmp_info_handler},
{"ColorTable", ff_bmp_color_handler},
{"RasterData", ff_bmp_data_handler},
{NULL, NULL} // Terminator
};
ff_result ff_bmp_isvalid(ff_ctx* ctx, ff_stream *stream);
ff_result ff_open_bmp(ff_ctx* ctx, ff_stream *stream, ff_bmp_ctx **out_ctx, ff_flag require_valid);
#endif // BMP_H_
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