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src/libUnuk/ImageLoader.h
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    00001 // ===================================================================
    00002 // This image loader will read in a 32-bit bitmap.
    00003 // ===================================================================
    00004
    00005 #ifndef _IMAGELOADER_H_
    00006 #define _IMAGELOADER_H_
    00007
    00008 typedef unsigned char   BYTE;
    00009 typedef int             LONG;
    00010 typedef unsigned int    DWORD;
    00011 typedef unsigned short  WORD;
    00012
    00013 // Provides general information about the file.
    00014 typedef struct __attribute__ ((__packed__)) tagBITMAPFILEHEADER {
    00015   WORD  bfType;
    00016   DWORD bfSize;
    00017   WORD  bfReserved1;
    00018   WORD  bfReserved2;
    00019   DWORD bfOffBits;
    00020 } BITMAPFILEHEADER, *PBITMAPFILEHEADER;
    00021
    00022 // The information header provides information specific to the image data.
    00023 typedef struct __attribute__ ((__packed__)) tagBITMAPINFOHEADER {
    00024   DWORD biSize;
    00025   LONG  biWidth;
    00026   LONG  biHeight;
    00027   WORD  biPlanes;
    00028   WORD  biBitCount;
    00029   DWORD biCompression;
    00030   DWORD biSizeImage;
    00031   DWORD biXPelsPerMeter;
    00032   DWORD biYPelsPerMeter;
    00033   DWORD biCLRUsed;
    00034   DWORD biCLRImportant;
    00035 } BITMAPINFOHEADER, *PBITAPINFOHEADER;
    00036
    00037 // Color palette.
    00038 typedef struct __attribute__ ((__packed__)) tagRGBQUAD {
    00039   BYTE rbgBlue;
    00040   BYTE rgbGreen;
    00041   BYTE rgbRed;
    00042   BYTE rgbReserved;
    00043 } RGBQUAD;
    00044
    00045 class ImageLoader {
    00046 public:
    00047   ImageLoader(void);
    00048   ImageLoader(const char *filename);
    00049
    00050   virtual ~ImageLoader(void);
    00051
    00052   bool LoadBMP(const char *filename);
    00053   BYTE *GetAlpha(void) const;
    00054
    00055   LONG     GetHeight(void)      const { return height;    }
    00056   RGBQUAD  *GetColors(void)     const { return colors;    }
    00057   bool     GetLoaded(void)      const { return loaded;    }
    00058   BYTE     *GetPixelData(void)  const { return pixelData; }
    00059   LONG     GetWidth(void)       const { return width;     }
    00060
    00061 private:
    00062   BITMAPFILEHEADER  bmfh;
    00063   BITMAPINFOHEADER  bmih;
    00064   RGBQUAD           *colors;
    00065   BYTE              *pixelData;
    00066   bool              loaded;
    00067   LONG              width;
    00068   LONG              height;
    00069   WORD              bpp;
    00070
    00071   // Private methods.
    00072   void Reset(void);
    00073   bool FixPadding(BYTE const * const tempPixelData, DWORD size);
    00074 };
    00075
    00076 #endif

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