bool UIAlgorithm::gaussBlur(HWND hWnd, HDC hdcCompatible, HBITMAP hbm, BlurEffectParam* param)
{
RECT rect;
::GetWindowRect(hWnd, &rect);
int w = rect.right - rect.left;
int h = rect.bottom - rect.top;
int * data = new int[w * h];
BITMAPINFO infoHeader;
memset(&infoHeader.bmiHeader, 0, sizeof(BITMAPINFOHEADER));
infoHeader.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
infoHeader.bmiHeader.biWidth = w;
infoHeader.bmiHeader.biHeight = -h;
infoHeader.bmiHeader.biPlanes = 1;
infoHeader.bmiHeader.biBitCount = 32; // 这里建议用32，经过测试在我的机器上比24速度快比较多
infoHeader.bmiHeader.biCompression = BI_RGB;
::GetDIBits(hdcCompatible, hbm, 0, h, data, &infoHeader, DIB_RGB_COLORS);
if(!gaussBlur(data, w, h, param->dSigma, param->nRadius))
return false;
SetDIBits(hdcCompatible, hbm, 0, abs(infoHeader.bmiHeader.biHeight), data, &infoHeader, DIB_RGB_COLORS);
return true;
}
IntensityMap GaussianBlur::calculate(IntensityMap &input, double radius, bool tileable) {
IntensityMap result = IntensityMap(input.getWidth(), input.getHeight());
gaussBlur(input, result, radius, tileable);
return result;
}
void CBlurCompositor::render(ISceneManager* smgr, bool lastCompositor)
{
switch (mBlurAlgorithm)
{
case SCompositorCreateParam::EBLUR_NEAR_POINTS_4:
case SCompositorCreateParam::EBLUR_NEAR_POINTS_8:
squareBlur(smgr, lastCompositor);
break;
case SCompositorCreateParam::EBLUR_GAUSSIAN:
gaussBlur(smgr, lastCompositor);
break;
default:
break;
}
}
