//
// DIBを作成する
//
BOOL CDib::Create(int width, int height, int depth)
{
W = width;
H = height;
D = depth;
bytes_per_line = ScanBytes(width, depth);
bytes_per_pixel = PixelBytes(depth);
long bitsAlloc = bytes_per_line * height;
long headerSize = sizeof(BITMAPINFOHEADER);
if (depth == 8)
headerSize += sizeof(RGBQUAD) * 256;
if ((hGlobal = ::GlobalAlloc(GMEM_MOVEABLE, bitsAlloc + headerSize)) == 0)
return FALSE;
Info = (BITMAPINFO *)::GlobalLock(hGlobal);
Bits = (void *)((char *)Info + headerSize);
Info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
Info->bmiHeader.biWidth = width;
Info->bmiHeader.biHeight = height;
Info->bmiHeader.biBitCount = (unsigned short)depth;
Info->bmiHeader.biPlanes = 1;
Info->bmiHeader.biXPelsPerMeter = 0;
Info->bmiHeader.biYPelsPerMeter = 0;
Info->bmiHeader.biClrUsed = 0;
Info->bmiHeader.biClrImportant = 0;
Info->bmiHeader.biCompression = BI_RGB;
Info->bmiHeader.biSizeImage = bitsAlloc;
return TRUE;
}
void PixelFormat::SetPixel(BYTE* pb, Pixel pixel) const
{
switch (PixelBytes()) {
case 1: *pb = (BYTE)(pixel.Value()); break;
case 2: *(WORD*)pb = (WORD)(pixel.Value()); break;
case 3:
pb[0] = (BYTE)(((pixel.Value()) >> 0) & 0xff);
pb[1] = (BYTE)(((pixel.Value()) >> 8) & 0xff);
pb[2] = (BYTE)(((pixel.Value()) >> 16) & 0xff);
break;
case 4: *(DWORD*)pb = (pixel.Value()); break;
}
}
Pixel PixelFormat::GetPixel(const BYTE* pb) const
{
switch (PixelBytes()) {
case 1: return Pixel::Create(*pb);
case 2: return Pixel::Create(*(WORD*)pb);
case 3:
return
Pixel::Create(
(DWORD(pb[0]) << 0)
| (DWORD(pb[1]) << 8)
| (DWORD(pb[2]) << 16)
);
case 4: return Pixel::Create(*(DWORD*)pb);
}
return Pixel::Create(0);
}
