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/* * src/bitmap.h
* (c) 2020 Jonas Gunz <himself@jonasgunz.de>
* License: MIT
*/
#ifndef _BITMAP_H_
#define _BITMAP_H_
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <errno.h>
#include "dynalloc.h"
#define _HEADER_SIZE 54 //Fileheader + infoheader
#define IDENTIFIER 0x424d //BM BitMap identifier
//Address Definitions
#define BF_TYPE 0x00
#define BF_SIZE 0x02
#define BF_OFF_BITS 0x0a
#define BI_SIZE 0x0e
#define BI_WIDTH 0x12
#define BI_HEIGHT 0x16
#define BI_BIT_COUNT 0x1c
#define BI_COMPRESSION 0x1e
#define BI_SIZE_IMAGE 0x22
#define BI_CLR_USED 0x2e
#define BI_CLR_IMPORTANT 0x32
#define R(x) (0xff0000 & x) >> 16
#define G(x) (0x00ff00 & x) >> 8
#define B(x) (0x0000ff & x)
#define BITMAP_MONOCHROME 0x01
struct bitmap_file_header {
uint8_t error;
uint16_t bfType;
uint32_t bfSize;
uint32_t bfOffBits;
uint32_t biSize;
int32_t biWidth;
int32_t biHeight;
uint16_t biBitCount;
uint32_t biCompression;
uint32_t biSizeImage;
uint32_t biClrUsed;
uint32_t biClrImportant;
unsigned char *tables;
uint32_t tablesc;
};
struct bitmap_image {
unsigned int x,y;
uint8_t **R;
uint8_t **G;
uint8_t **B;
uint8_t tags;
uint8_t monochrome_maximum_brightness;
uint8_t monochrome_minimum_brightness;
};
int bitmap_read ( char *_file, struct bitmap_image *_bitmap );
int bitmap_copy ( struct bitmap_image *_input, struct bitmap_image *_output );
int bitmap_convert_monochrome ( struct bitmap_image *_input, struct bitmap_image *_output );
int bitmap_shrink ( struct bitmap_image *_input, struct bitmap_image *_output, unsigned int _factor_x, unsigned int _factor_y );
int bitmap_fit_to_width ( struct bitmap_image *_input, struct bitmap_image *_output, unsigned int _width );
char* bitmap_strerror( int _error );
#endif /* end of include guard: _BITMAP_H_ */
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