void OnDestroy()
{
// RT are not released automatically
if (BlurredScreen)
{
BlurredScreen.Release();
}
}
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 ProgressiveBlur(RenderTexture source)
{
//Resize global texture if base downsample changed
if (Downsample != lastDownsample)
{
BlurredScreen = new RenderTexture(
Cam.pixelWidth >> Downsample,
Cam.pixelHeight >> Downsample,
0);
lastDownsample = Downsample;
}
if (BlurredScreen.IsCreated())
{
BlurredScreen.DiscardContents();
}
//Relative blur size to maintain same look across multiple resolution
material.SetFloat("size", Size * ScreenSize);
int firstDownsampleFactor = iteration > 0 ? 1 : 0 + Downsample;
//= width / (downsample + 1)^2
int rtW = source.width >> firstDownsampleFactor;
int rtH = source.height >> firstDownsampleFactor;
RenderTexture rt = RenderTexture.GetTemporary(rtW, rtH, 0, source.format);
//Bilinear filtering mode increase blurriness when scaled
rt.filterMode = FilterMode.Bilinear;
source.filterMode = FilterMode.Bilinear;
//Initial downsample
Graphics.Blit(source, rt, material, 0);
//Downsample. (iteration - 1) pass
for (int i = 2; i < Iteration + 1; i++)
{
ProgressiveResampling(source, i, ref rt);
}
//Upsample. (iteration - 1) pass
for (int i = Iteration - 1; i > 0; i--)
{
ProgressiveResampling(source, i, ref rt);
}
//Final upsample. Blit to blurredRt
Graphics.Blit(rt, BlurredScreen, material, 0);
RenderTexture.ReleaseTemporary(rt);
}
protected virtual void CreateNewBlurredScreen()
{
if (BlurredScreen)
{
BlurredScreen.Release();
}
BlurredScreen = new RenderTexture(Mathf.RoundToInt(Cam.pixelWidth * BlurRegion.width) >> Downsample,
Mathf.RoundToInt(Cam.pixelHeight * BlurRegion.height) >> Downsample,
0)
{
name = $"{gameObject.name} Translucent Image Source",
filterMode = FilterMode.Bilinear,
};
BlurredScreen.Create();
}