Bitmap.h

00001 //
00002 // Windows BMP file definitions.
00003 //
00004 // Adapted from code written by Michael Sweet from Paul Bourke's
00005 // web site: http://paulbourke.net/dataformats/bmp/
00006 //
00007 
00008 #ifndef _BITMAP_H_
00009 #define _BITMAP_H_
00010 
00011 #include <mbed.h>
00012 
00013 // BITMAPFILEHEADER
00014 // BITMAPINFOHEADER
00015 // Optional Palette
00016 // Raw Data
00017 
00018 //
00019 // Bitmap file data structures
00020 //
00021 // must align to 2-byte boundaries so it doesn't alter the memory image when 
00022 // bytes are read from the file system into this footprint.
00023 #pragma push
00024 #pragma pack(2)
00025 
00026 typedef struct                    /**** BMP file header structure ****/
00027     {
00028     uint16_t    bfType;           /* Magic number for file */
00029     uint32_t    bfSize;           /* Size of file */
00030     uint16_t    bfReserved1;      /* Reserved */
00031     uint16_t    bfReserved2;      /* ... */
00032     uint32_t    bfOffBits;        /* Offset to bitmap data */
00033     } BITMAPFILEHEADER;
00034 
00035 typedef struct                    /**** BMP file info structure ****/
00036     {
00037     uint32_t    biSize;           /* Size of info header */
00038     uint32_t    biWidth;          /* Width of image */
00039     uint32_t    biHeight;         /* Height of image */
00040     uint16_t    biPlanes;         /* Number of color planes */
00041     uint16_t    biBitCount;       /* Number of bits per pixel */
00042     uint32_t    biCompression;    /* Type of compression to use */
00043     uint32_t    biSizeImage;      /* Size of image data */
00044     int32_t     biXPelsPerMeter;  /* X pixels per meter */
00045     int32_t     biYPelsPerMeter;  /* Y pixels per meter */
00046     uint32_t    biClrUsed;        /* Number of colors used */
00047     uint32_t    biClrImportant;   /* Number of important colors */
00048     } BITMAPINFOHEADER;
00049 #pragma pop
00050 
00051 #define BF_TYPE 0x4D42            /* "MB" */
00052 
00053 /*
00054  * Constants for the biCompression field...
00055  */
00056 
00057 #  define BI_RGB       0             /* No compression - straight BGR data */
00058 #  define BI_RLE8      1             /* 8-bit run-length compression */
00059 #  define BI_RLE4      2             /* 4-bit run-length compression */
00060 #  define BI_BITFIELDS 3             /* RGB bitmap with RGB masks */
00061 
00062 typedef struct                       /**** Colormap entry structure ****/
00063     {
00064     uint8_t  rgbBlue;          /* Blue value */
00065     uint8_t  rgbGreen;         /* Green value */
00066     uint8_t  rgbRed;           /* Red value */
00067     uint8_t  rgbReserved;      /* Reserved */
00068     } RGBQUAD;
00069 
00070 //typedef struct                       /**** Bitmap information structure ****/
00071 //    {
00072 //    BITMAPINFOHEADER bmiHeader;      /* Image header */
00073 //    RGBQUAD          bmiColors[256]; /* Image colormap */
00074 //    } BITMAPINFO;
00075 
00076 
00077 #pragma push
00078 #pragma pack(2)
00079 
00080 typedef struct                  /**** ICO file header structure ****/
00081     {
00082     uint16_t    Reserved_zero;  // Always zero
00083     uint16_t    icType;         // 1 for .ico, 2 for .cur
00084     uint16_t    icImageCount;   // number of images in the file    
00085     } ICOFILEHEADER;
00086     
00087 typedef struct                  /**** ICO file Directory Entry structure (1 or more) ****/
00088     {
00089     uint8_t     biWidth;          /* Width of image */
00090     uint8_t     biHeight;         /* Height of image */
00091     uint8_t     biClrUsed;        /* Number of colors used */
00092     uint8_t     Reserved_zero;
00093     uint16_t    biPlanes;         /* Number of color planes (ICO should be 0 or 1, CUR horz hotspot */
00094     uint16_t    biBitCount;       /* Number of bits per pixel (ICO bits per pixel, CUR vert hotspot */
00095     uint32_t    biSizeImage;      /* Size of image data */
00096     uint32_t    bfOffBits;        /* Offset into file for the bitmap data */
00097     } ICODIRENTRY;
00098 #pragma pop
00099 
00100 #define IC_TYPE 0x0001            /* 1 = ICO (icon), 2 = CUR (cursor) */
00101 
00102 #endif // _BITMAP_H_