bmp24.h

00001 #ifndef BMP24_H
00002 #define BMP24_H
00003 
00004 #define BMP24_WIDTH  (16*4)
00005 #define BMP24_HEIGHT (16*3)
00006 
00007 class bmp24 {
00008     uint8_t m_bitmap[BMP24_WIDTH*BMP24_HEIGHT*3];
00009 public:
00010     int width;
00011     int height;
00012 
00013     bmp24() {
00014         width = BMP24_WIDTH;
00015         height = BMP24_HEIGHT;
00016     }
00017     
00018     void clear() {
00019         memset(m_bitmap, 0, sizeof(m_bitmap));
00020     }
00021     
00022     void point(int x, int y, uint8_t* rgb) {
00023         if (x >= 0 && x < width && y >= 0 && y < height) {
00024             int pos = y*width*3+x*3;
00025             m_bitmap[pos++] = rgb[0];
00026             m_bitmap[pos++] = rgb[1];
00027             m_bitmap[pos]   = rgb[2];
00028         }
00029     }
00030     
00031     void LE32write(uint8_t* buf, int value) {
00032         *buf++ = value & 0xff;
00033         *buf++ = (value>>8) & 0xff;
00034         *buf++ = (value>>16) & 0xff;
00035         *buf   = (value>>24) & 0xff;
00036     }
00037     
00038     bool writeFile(const char *path) {
00039         FILE *fp = fopen(path, "wb");
00040         if (fp == NULL) {
00041             return false;
00042         }
00043         uint8_t header[] = {
00044 0x42,0x4d,0x36,0xe1,0x00,0x00,0x00,0x00,0x00,0x00,0x36,0x00,0x00,0x00,0x28,0x00,
00045 0x00,0x00,0xa0,0x00,0x00,0x00,0x78,0x00,0x00,0x00,0x01,0x00,0x18,0x00,0x00,0x00,
00046 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
00047 0x00,0x00,0x00,0x00,0x00,0x00};
00048         int file_size = sizeof(header) + sizeof(m_bitmap);
00049         LE32write(header+2, file_size);
00050         LE32write(header+18, width);
00051         LE32write(header+22, height);
00052         
00053         fwrite(header, 1, sizeof(header), fp);
00054         for(int y = height-1; y >=0; y--) {
00055             for(int x = 0; x < width; x++) {
00056                 fputc(m_bitmap[y*width*3+x*3+2], fp);
00057                 fputc(m_bitmap[y*width*3+x*3+1], fp);
00058                 fputc(m_bitmap[y*width*3+x*3+0], fp);
00059             }
00060         }    
00061         fclose(fp);
00062         return true;
00063     }
00064 };
00065 
00066 #endif // BMP24_H