CFX_DIBitmap* _FX_WindowsDIB_LoadFromBuf(BITMAPINFO* pbmi, LPVOID pData, FX_BOOL bAlpha)
{
int width = pbmi->bmiHeader.biWidth;
int height = pbmi->bmiHeader.biHeight;
BOOL bBottomUp = TRUE;
if (height < 0) {
height = -height;
bBottomUp = FALSE;
}
int pitch = (width * pbmi->bmiHeader.biBitCount + 31) / 32 * 4;
CFX_DIBitmap* pBitmap = FX_NEW CFX_DIBitmap;
if (!pBitmap) {
return NULL;
}
FXDIB_Format format = bAlpha ? (FXDIB_Format)(pbmi->bmiHeader.biBitCount + 0x200) : (FXDIB_Format)pbmi->bmiHeader.biBitCount;
FX_BOOL ret = pBitmap->Create(width, height, format);
if (!ret) {
delete pBitmap;
return NULL;
}
FXSYS_memcpy32(pBitmap->GetBuffer(), pData, pitch * height);
if (bBottomUp) {
FX_LPBYTE temp_buf = FX_Alloc(FX_BYTE, pitch);
if (!temp_buf) {
if (pBitmap) {
delete pBitmap;
}
return NULL;
}
int top = 0, bottom = height - 1;
while (top < bottom) {
FXSYS_memcpy32(temp_buf, pBitmap->GetBuffer() + top * pitch, pitch);
FXSYS_memcpy32(pBitmap->GetBuffer() + top * pitch, pBitmap->GetBuffer() + bottom * pitch, pitch);
FXSYS_memcpy32(pBitmap->GetBuffer() + bottom * pitch, temp_buf, pitch);
top ++;
bottom --;
}
FX_Free(temp_buf);
temp_buf = NULL;
}
if (pbmi->bmiHeader.biBitCount == 1) {
for (int i = 0; i < 2; i ++) {
pBitmap->SetPaletteEntry(i, ((FX_DWORD*)pbmi->bmiColors)[i] | 0xff000000);
}
} else if (pbmi->bmiHeader.biBitCount == 8) {
for (int i = 0; i < 256; i ++) {
pBitmap->SetPaletteEntry(i, ((FX_DWORD*)pbmi->bmiColors)[i] | 0xff000000);
}
}
return pBitmap;
}
