1 /* $Id$ */ 2 #ifdef __cplusplus 3 extern "C" { 4 #endif 5 6 /* 7 gd_bmp.c 8 9 Bitmap format support for libgd 10 11 * Written 2007, Scott MacVicar 12 --------------------------------------------------------------------------- 13 14 Todo: 15 16 RLE4, RLE8 and Bitfield encoding 17 Add full support for Windows v4 and Windows v5 header formats 18 19 ---------------------------------------------------------------------------- 20 */ 21 22 #ifndef BMP_H 23 #define BMP_H 1 24 25 #define BMP_PALETTE_3 1 26 #define BMP_PALETTE_4 2 27 28 #define BMP_WINDOWS_V3 40 29 #define BMP_OS2_V1 12 30 #define BMP_OS2_V2 64 31 #define BMP_WINDOWS_V4 108 32 #define BMP_WINDOWS_V5 124 33 34 #define BMP_BI_RGB 0 35 #define BMP_BI_RLE8 1 36 #define BMP_BI_RLE4 2 37 #define BMP_BI_BITFIELDS 3 38 #define BMP_BI_JPEG 4 39 #define BMP_BI_PNG 5 40 41 #define BMP_RLE_COMMAND 0 42 #define BMP_RLE_ENDOFLINE 0 43 #define BMP_RLE_ENDOFBITMAP 1 44 #define BMP_RLE_DELTA 2 45 46 #define BMP_RLE_TYPE_RAW 0 47 #define BMP_RLE_TYPE_RLE 1 48 49 /* BMP header. */ 50 typedef struct { 51 /* 16 bit - header identifying the type */ 52 signed short int magic; 53 54 /* 32bit - size of the file */ 55 int size; 56 57 /* 16bit - these two are in the spec but "reserved" */ 58 signed short int reserved1; 59 signed short int reserved2; 60 61 /* 32 bit - offset of the bitmap header from data in bytes */ 62 signed int off; 63 64 } bmp_hdr_t; 65 66 /* BMP info. */ 67 typedef struct { 68 /* 16bit - Type, ie Windows or OS/2 for the palette info */ 69 signed short int type; 70 /* 32bit - The length of the bitmap information header in bytes. */ 71 signed int len; 72 73 /* 32bit - The width of the bitmap in pixels. */ 74 signed int width; 75 76 /* 32bit - The height of the bitmap in pixels. */ 77 signed int height; 78 79 /* 8 bit - The bitmap data is specified in top-down order. */ 80 signed char topdown; 81 82 /* 16 bit - The number of planes. This must be set to a value of one. */ 83 signed short int numplanes; 84 85 /* 16 bit - The number of bits per pixel. */ 86 signed short int depth; 87 88 /* 32bit - The type of compression used. */ 89 signed int enctype; 90 91 /* 32bit - The size of the image in bytes. */ 92 signed int size; 93 94 /* 32bit - The horizontal resolution in pixels/metre. */ 95 signed int hres; 96 97 /* 32bit - The vertical resolution in pixels/metre. */ 98 signed int vres; 99 100 /* 32bit - The number of color indices used by the bitmap. */ 101 signed int numcolors; 102 103 /* 32bit - The number of color indices important for displaying the bitmap. */ 104 signed int mincolors; 105 106 } bmp_info_t; 107 108 #endif 109 110 #ifdef __cplusplus 111 } 112 #endif 113
