1. // BMP-related data types based on Microsoft's own
2.  
3. #include <stdint.h>
4.  
5. // aliases for C/C++ primitive data types
6. // https://msdn.microsoft.com/en-us/library/cc230309.aspx
7. typedef uint8_t  BYTE;
8. typedef uint32_t DWORD;
9. typedef int32_t  LONG;
10. typedef uint16_t WORD;
11.  
12. // information about the type, size, and layout of a file
13. // https://msdn.microsoft.com/en-us/library/dd183374(v=vs.85).aspx
14. typedef struct
15. {
16.     WORD bfType;
17.     DWORD bfSize;
18.     WORD bfReserved1;
19.     WORD bfReserved2;
20.     DWORD bfOffBits;
21. } __attribute__((__packed__))
22. BITMAPFILEHEADER;
23.  
24. // information about the dimensions and color format
25. // https://msdn.microsoft.com/en-us/library/dd183376(v=vs.85).aspx
26. typedef struct
27. {
28.     DWORD biSize;
29.     LONG biWidth;
30.     LONG biHeight;
31.     WORD biPlanes;
32.     WORD biBitCount;
33.     DWORD biCompression;
34.     DWORD biSizeImage;
35.     LONG biXPelsPerMeter;
36.     LONG biYPelsPerMeter;
37.     DWORD biClrUsed;
38.     DWORD biClrImportant;
39. } __attribute__((__packed__))
40. BITMAPINFOHEADER;
41.  
42. // relative intensities of red, green, and blue
43. // https://msdn.microsoft.com/en-us/library/dd162939(v=vs.85).aspx
44. typedef struct
45. {
46.     BYTE rgbtBlue;
47.     BYTE rgbtGreen;
48.     BYTE rgbtRed;
49. } __attribute__((__packed__))
50. RGBTRIPLE;
51.