CHNOSProject/chnos/tolset_chn_000/chnos_010/chnos/fmt_bmp.c

   1 \r
   2 #include "core.h"\r
   3 \r
   4 //\83p\83f\83B\83\93\83O\82Ì\8aÖ\8cW\82Å\82±\82ñ\82È\82±\82Æ\82É\82È\82Á\82Ä\82é\r
   5 typedef struct DATA_FORMAT_BMP_FILE_HEADER {\r
   6         uchar sign[2];\r
   7         uchar filesize[4];\r
   8         uchar reserved0[2];\r
   9         uchar reserved1[2];\r
  10         uchar offset_to_data[4];\r
  11 } DATA_Format_BMP_FileHeader;\r
  12 \r
  13 //OS/2 Type\r
  14 typedef struct DATA_FORMAT_BMP_CORE_HEADER {\r
  15         uint headersize;\r
  16         short xsize;\r
  17         short ysize;\r
  18         ushort planes;\r
  19         ushort bpp;\r
  20 } DATA_Format_BMP_CoreHeader;\r
  21 \r
  22 //Windows Type\r
  23 typedef struct DATA_FORMAT_BMP_INFO_HEADER {\r
  24         uint headersize;\r
  25         int xsize;\r
  26         int ysize;\r
  27         ushort planes;\r
  28         ushort bpp;\r
  29         uint compression_type;  //0:no compression, 1:RLE8 2:RLE4 3:bit field\r
  30         uint image_data_size;\r
  31         uint pixel_per_meter_x;\r
  32         uint pixel_per_meter_y;\r
  33         uint colors_in_palette;\r
  34         uint index_of_important_color;\r
  35 } DATA_Format_BMP_InformationHeader;\r
  36 \r
  37 typedef struct DATA_FORMAT_BMP_RGB24 {\r
  38         uchar b;\r
  39         uchar g;\r
  40         uchar r;\r
  41 } DATA_Format_BMP_RGB24;\r
  42 \r
  43 uint Format_BMP_DrawPicture(void *vram, uint xsize, uint x, uint y, uint pxsize, uint pysize, void *bmp)\r
  44 {\r
  45         uchar s[128];\r
  46         DATA_Format_BMP_FileHeader *fheader;\r
  47         DATA_Format_BMP_InformationHeader *infoheader;\r
  48         uint *read32;\r
  49         DATA_Format_BMP_RGB24 *rgb24;\r
  50         uint ix, iy;\r
  51 \r
  52         uint offset_to_data, filesize;\r
  53 \r
  54         fheader = (DATA_Format_BMP_FileHeader *)bmp;\r
  55 \r
  56         if(fheader->sign[0] != 'B' || fheader->sign[1] != 'M'){\r
  57                 Drawing_Put_String(vram, xsize, x, y, 0x000000, "BMP:Unknown File Format.");\r
  58                 return 1;\r
  59         }\r
  60 \r
  61         read32 = (uint *)(&fheader->filesize[0]);\r
  62         filesize = *read32;\r
  63         read32 = (uint *)(&fheader->offset_to_data[0]);\r
  64         offset_to_data = *read32;\r
  65 \r
  66         //snprintf(s, sizeof(s), "size:%d offset:%d", filesize, offset_to_data);\r
  67         //Drawing_Put_String(vram, xsize, x, y, 0x000000, s);\r
  68 \r
  69         read32 = (uint *)(bmp + 0x0e);\r
  70 \r
  71         if(*read32 == 12){\r
  72                 Drawing_Put_String(vram, xsize, x, y + 16 * 1, 0x000000, "BMP Core Header.(not implemented.)");\r
  73                 return 2;\r
  74         } else if(*read32 == 40){\r
  75                 //Drawing_Put_String(vram, xsize, x, y + 16 * 1, 0x000000, "BMP INFO Header.");\r
  76                 infoheader = (DATA_Format_BMP_InformationHeader *)(bmp + 0x0e);\r
  77                 if(infoheader->ysize > 0){\r
  78                         //Drawing_Put_String(vram, xsize, x, y + 16 * 2, 0x000000, "Bottom Up.");\r
  79                 } else{\r
  80                         Drawing_Put_String(vram, xsize, x, y + 16 * 2, 0x000000, "Top Down (not implemented).");\r
  81                         return 5;\r
  82                 }\r
  83 \r
  84                 if(infoheader->compression_type == 0){\r
  85                         //Drawing_Put_String(vram, xsize, x, y + 16 * 3, 0x000000, "No compression.");\r
  86                 } else{\r
  87                         Drawing_Put_String(vram, xsize, x, y + 16 * 3, 0x000000, "Compressed (not implemented).");\r
  88                         return 4;\r
  89                 }\r
  90 \r
  91                 if(infoheader->bpp == 24){\r
  92                         //Drawing_Put_String(vram, xsize, x, y + 16 * 4, 0x000000, "24 bpp.");\r
  93                 } else{\r
  94                         snprintf(s, sizeof(s), "%d bpp(not implemented).", infoheader->bpp);\r
  95                         Drawing_Put_String(vram, xsize, x, y + 16 * 4, 0x000000, s);\r
  96                         return 6;\r
  97                 }\r
  98 \r
  99                 //snprintf(s, sizeof(s), "xsize:%d ysize:%d", infoheader->xsize, infoheader->ysize);\r
 100                 //Drawing_Put_String(vram, xsize, x, y + 16 * 5, 0x000000, s);\r
 101 \r
 102                 rgb24 = (DATA_Format_BMP_RGB24 *)(bmp + offset_to_data);\r
 103 \r
 104                 for(iy = infoheader->ysize; iy > 0; iy--){\r
 105                         for(ix = 0; ix < infoheader->xsize; ix++){\r
 106                                 Drawing_Draw_Point(vram, xsize, x + ix, y + iy - 1, rgb24->r << 16 | rgb24->g << 8 | rgb24->b);\r
 107                                 rgb24 = (DATA_Format_BMP_RGB24 *)((uint)rgb24 + 3);\r
 108                         }\r
 109                         rgb24 = (DATA_Format_BMP_RGB24 *)((uint)rgb24 + ((infoheader->xsize + 3) & ~3) - infoheader->xsize);\r
 110                 }\r
 111         } else{\r
 112                 Drawing_Put_String(vram, xsize, x, y + 16 * 1, 0x000000, "Unknown BMP Header.");\r
 113                 return 3;\r
 114         }\r
 115 \r
 116         return 0;\r
 117 }\r