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 
00023 // bytes are read from the file system into this footprint.
00024 #ifdef __GNUC__
00025 #pragma pack(push, 1)
00026 #define ALIGNMENT
00027 #else
00028 #define ALIGNMENT
00029 #pragma push
00030 #pragma pack(2)
00031 #endif
00032 
00033 /// Bitmap file header
00034 typedef struct                    /**** BMP file header structure ****/
00035     {
00036     uint16_t    bfType;           ///< Magic number for file
00037     uint32_t    bfSize;           ///< Size of file
00038     uint16_t    bfReserved1;      ///< reserved placeholder for the structure footprint
00039     uint16_t    bfReserved2;      ///< reserved placeholder for the structure footprint
00040     uint32_t    bfOffBits;        ///< Offset to bitmap data
00041 
00042     } BITMAPFILEHEADER ALIGNMENT;           // Size: 14B
00043 #if (defined(WIN32))
00044 static_assert(sizeof(BITMAPFILEHEADER) == 14, "Alignment Error");
00045 #endif
00046 
00047 /// Bitmap information header
00048 typedef struct                    /**** BMP file info structure ****/
00049     {
00050     uint32_t    biSize;           ///< Size of info header
00051     uint32_t    biWidth;          ///< Width of image
00052     uint32_t    biHeight;         ///< Height of image
00053     uint16_t    biPlanes;         ///< Number of color planes
00054     uint16_t    biBitCount;       ///< Number of bits per pixel
00055     uint32_t    biCompression;    ///< Type of compression to use
00056     uint32_t    biSizeImage;      ///< Size of image data
00057     int32_t     biXPelsPerMeter;  ///< X pixels per meter
00058     int32_t     biYPelsPerMeter;  ///< Y pixels per meter
00059     uint32_t    biClrUsed;        ///< Number of colors used
00060     uint32_t    biClrImportant;   ///< Number of important colors
00061     } BITMAPINFOHEADER ALIGNMENT;           // Size: 40B
00062 #ifdef __GNUC__
00063 #pragma pack(pop)
00064 #undef ALIGNMENT
00065 #else
00066 #pragma pop
00067 #endif
00068 
00069 #define BF_TYPE 0x4D42            /* "MB" */
00070 
00071 /*
00072  * Constants for the biCompression field...
00073  */
00074 
00075 #  define BI_RGB       0             /* No compression - straight BGR data */
00076 #  define BI_RLE8      1             /* 8-bit run-length compression */
00077 #  define BI_RLE4      2             /* 4-bit run-length compression */
00078 #  define BI_BITFIELDS 3             /* RGB bitmap with RGB masks */
00079 
00080 /// An RGB Quad data type used by the bitmap driver.
00081 typedef struct                       /**** Colormap entry structure ****/
00082     {
00083     uint8_t  rgbBlue;          ///< Blue value
00084     uint8_t  rgbGreen;         ///< Green value
00085     uint8_t  rgbRed;           ///< Red value
00086     uint8_t  rgbReserved;      ///< Reserved
00087     } RGBQUAD;
00088 
00089 //typedef struct                       /**** Bitmap information structure ****/
00090 //    {
00091 //    BITMAPINFOHEADER bmiHeader;      /* Image header */
00092 //    RGBQUAD          bmiColors[256]; /* Image colormap */
00093 //    } BITMAPINFO;
00094 
00095 #ifdef __GNUC__
00096 #pragma pack(push, 1)
00097 #define ALIGNMENT
00098 #else
00099 #pragma push
00100 #pragma pack(2)
00101 #endif
00102 
00103 /// Icon file type file header.
00104 typedef struct                  /**** ICO file header structure ****/
00105     {
00106     uint16_t    Reserved_zero;  ///< Always zero
00107     uint16_t    icType;         ///< 1 for .ico, 2 for .cur
00108     uint16_t    icImageCount;   ///< number of images in the file
00109     } ICOFILEHEADER;
00110 
00111 /// Icon file type directory entry structure
00112 typedef struct                  /**** ICO file Directory Entry structure (1 or more) ****/
00113     {
00114     uint8_t     biWidth;        ///< Width of image 
00115     uint8_t     biHeight;       ///< Height of image 
00116     uint8_t     biClrUsed;      ///< Number of colors used 
00117     uint8_t     Reserved_zero;  ///< reserved placeholder for the structure footprint
00118     uint16_t    biPlanes;       ///< Number of color planes (ICO should be 0 or 1, CUR horz hotspot 
00119     uint16_t    biBitCount;     ///< Number of bits per pixel (ICO bits per pixel, CUR vert hotspot 
00120     uint32_t    biSizeImage;    ///< Size of image data 
00121     uint32_t    bfOffBits;      ///< Offset into file for the bitmap data 
00122     } ICODIRENTRY;
00123 #ifdef __GNUC__
00124 #pragma pack(pop)
00125 #undef ALIGNMENT
00126 #else
00127 #pragma pop
00128 #endif
00129 
00130 #define IC_TYPE 0x0001            /* 1 = ICO (icon), 2 = CUR (cursor) */
00131 
00132 #endif // _BITMAP_H_