protected virtual void OnRenderImage(RenderTexture source, RenderTexture destination)
{
if (blurAlgorithm == null || BlurConfig == null)
{
goto draw_unmodified;
}
if (shouldUpdateBlur())
{
//Resize final texture if base downsample changed
if (Downsample != lastDownsample || !BlurRegion.Approximately(lastBlurRegion))
{
CreateNewBlurredScreen();
lastDownsample = Downsample;
lastBlurRegion = BlurRegion;
}
blurAlgorithm.Blur(source, BlurRegion, ref blurredScreen);
}
if (preview)
{
previewMaterial.SetVector(ShaderProperties.blurTextureCropRegion, BlurRegion.ToMinMaxVector());
Graphics.Blit(BlurredScreen, destination, previewMaterial);
return;
}
draw_unmodified:
Graphics.Blit(source, destination);
}
public void OnBeforeBlur()
{
if (BlurredScreen == null || !BlurredScreen.IsCreated() ||
Downsample != lastDownsample ||
!BlurRegion.Approximately(lastBlurRegion))
{
CreateNewBlurredScreen();
lastDownsample = Downsample;
lastBlurRegion = BlurRegion;
}
}
protected virtual void ProgressiveBlur(RenderTexture sourceRt)
{
//Resize final texture if base downsample changed
if (Downsample != lastDownsample || !BlurRegion.Equals(lastBlurRegion))
{
CreateNewBlurredScreen();
lastDownsample = Downsample;
lastBlurRegion = BlurRegion;
}
if (BlurredScreen.IsCreated())
{
BlurredScreen.DiscardContents();
}
//Relative blur size to maintain same look across multiple resolution
material.SetFloat(_sizePropId, Size * ScreenSize);
int firstDownsampleFactor = iteration > 0 ? 1 : 0;
int rtW = BlurredScreen.width >> firstDownsampleFactor; //= width / (downsample + 1)^2
int rtH = BlurredScreen.height >> firstDownsampleFactor;
RenderTexture tmpRt = RenderTexture.GetTemporary(rtW, rtH, 0, sourceRt.format);
tmpRt.filterMode = FilterMode.Bilinear;
sourceRt.filterMode = FilterMode.Bilinear;
//Initial downsample
material.SetVector(_cropRegionPropId,
new Vector4(BlurRegion.xMin,
BlurRegion.yMin,
BlurRegion.xMax,
BlurRegion.yMax));
Graphics.Blit(sourceRt, tmpRt, material, 1);
//Downsample. (iteration - 1) pass
for (int i = 2; i <= iteration; i++)
{
ProgressiveResampling(i, ref tmpRt);
}
//Upsample. (iteration - 1) pass
for (int i = iteration - 1; i >= 1; i--)
{
ProgressiveResampling(i, ref tmpRt);
}
//Final upsample. Blit to blurredRt and release tmp
Graphics.Blit(tmpRt, BlurredScreen, material, 0);
RenderTexture.ReleaseTemporary(tmpRt);
}
protected virtual void OnRenderImage(RenderTexture source, RenderTexture destination)
{
if (blurAlgorithm == null || BlurConfig == null)
{
goto draw_unmodified;
}
if (shouldUpdateBlur())
{
OnBeforeBlur();
blurAlgorithm.Blur(source, BlurRegion, ref blurredScreen);
}
if (preview)
{
previewMaterial.SetVector(ShaderId.CROP_REGION, BlurRegion.ToMinMaxVector());
Graphics.Blit(BlurredScreen, destination, previewMaterial);
return;
}
draw_unmodified:
Graphics.Blit(source, destination);
}
