protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
var tempFormat = new RenderTargetFormat(source.Width, source.Height, false, source.Format, DepthFormat.None);
RenderTarget2D blurredScene = GraphicsService.RenderTargetPool.Obtain2D(tempFormat);
if (TextureHelper.IsFloatingPointFormat(source.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
graphicsDevice.SamplerStates[1] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
graphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
}
context.RenderTarget = blurredScene;
context.Viewport = new Viewport(0, 0, blurredScene.Width, blurredScene.Height);
// Get view-dependent information stored in camera node.
var cameraNode = context.CameraNode;
object dummy;
cameraNode.ViewDependentData.TryGetValue(this, out dummy);
var data = dummy as ViewDependentData;
if (data == null)
{
data = new ViewDependentData(GraphicsService);
cameraNode.ViewDependentData[this] = data;
}
if (data.LastBlurredScene == null)
{
// This is the first frame. Simply remember the current source for the next frame.
_copyFilter.Process(context);
}
else
{
// Create new blurred scene.
graphicsDevice.SetRenderTarget(blurredScene);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_strengthParameter.SetValue(Strength);
_sourceTextureParameter.SetValue(source);
_lastSourceTextureParameter.SetValue(data.LastBlurredScene);
_effect.CurrentTechnique.Passes[0].Apply();
graphicsDevice.DrawFullScreenQuad();
}
// Copy blurredScene to target.
context.SourceTexture = blurredScene;
context.RenderTarget = target;
context.Viewport = viewport;
_copyFilter.Process(context);
// Recycle old blurred scene and store new scene (switch render targets).
GraphicsService.RenderTargetPool.Recycle(data.LastBlurredScene);
data.LastBlurredScene = blurredScene;
_sourceTextureParameter.SetValue((Texture2D)null);
_lastSourceTextureParameter.SetValue((Texture2D)null);
// Restore original context.
context.SourceTexture = source;
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
RenderTarget2D temp128x128 = renderTargetPool.Obtain2D(
new RenderTargetFormat(128, 128, false, SurfaceFormat.HalfVector4, DepthFormat.None));
RenderTarget2D temp64x64 = renderTargetPool.Obtain2D(
new RenderTargetFormat(64, 64, false, SurfaceFormat.HalfVector4, DepthFormat.None));
RenderTarget2D luminance = renderTargetPool.Obtain2D(
new RenderTargetFormat(1, 1, false, SurfaceFormat.HalfVector4, DepthFormat.None));
// ----- Downsample scene into temp128x128.
context.RenderTarget = temp128x128;
context.Viewport = new Viewport(0, 0, temp128x128.Width, temp128x128.Height);
_downsampleFilter.Process(context);
_useGeometricMeanParameter.SetValue(UseGeometricMean);
// Get view-dependent information stored in camera node.
var cameraNode = context.CameraNode;
object dummy;
cameraNode.ViewDependentData.TryGetValue(this, out dummy);
var data = dummy as ViewDependentData;
if (data == null)
{
data = new ViewDependentData(GraphicsService);
cameraNode.ViewDependentData[this] = data;
}
if (UseAdaption)
{
// Use adaption if required by user and if we already have luminance info.
_useAdaptionParameter.SetValue(data.LastLuminance != null);
_deltaTimeParameter.SetValue((float)context.DeltaTime.TotalSeconds);
_adaptionSpeedParameter.SetValue(AdaptionSpeed);
_lastLuminanceTextureParameter.SetValue(data.LastLuminance);
}
else
{
_useAdaptionParameter.SetValue(false);
_lastLuminanceTextureParameter.SetValue((Texture2D)null);
// Reset old luminance info.
data.Dispose();
}
// ----- First downsample temp128x128 into temp64x64 and create luminance info.
graphicsDevice.SetRenderTarget(temp64x64);
_textureParameter.SetValue(temp128x128);
_sourceSizeParameter.SetValue(new Vector2(temp128x128.Width, temp128x128.Height));
_targetSizeParameter.SetValue(new Vector2(temp64x64.Width, temp64x64.Height));
_createPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// temp128x128 is not needed anymore.
renderTargetPool.Recycle(temp128x128);
// ----- Downsample luminance info.
RenderTarget2D last = temp64x64;
while (last.Width > 2)
{
Debug.Assert(last.Width == last.Height, "The render target must be quadratic");
RenderTarget2D temp = renderTargetPool.Obtain2D(
new RenderTargetFormat(last.Width / 2, last.Height / 2, false, last.Format, DepthFormat.None));
graphicsDevice.SetRenderTarget(temp);
_textureParameter.SetValue(last);
_sourceSizeParameter.SetValue(new Vector2(last.Width, last.Height));
_targetSizeParameter.SetValue(new Vector2(temp.Width, temp.Height));
_downsamplePass.Apply();
graphicsDevice.DrawFullScreenQuad();
renderTargetPool.Recycle(last);
last = temp;
}
// ----- Sample 'last' and store final info in 'luminance'.
graphicsDevice.SetRenderTarget(luminance);
_textureParameter.SetValue(last);
_sourceSizeParameter.SetValue(new Vector2(last.Width, last.Height));
_targetSizeParameter.SetValue(new Vector2(luminance.Width, luminance.Height));
_finalPass.Apply();
graphicsDevice.DrawFullScreenQuad();
renderTargetPool.Recycle(last);
// ----- Copy luminance to original context.RenderTarget.
context.SourceTexture = luminance;
context.RenderTarget = target;
context.Viewport = viewport;
_copyFilter.Process(context);
// ----- Store luminance for next frame.
renderTargetPool.Recycle(data.LastLuminance);
data.LastLuminance = luminance;
// Restore original context.
context.SourceTexture = source;
_textureParameter.SetValue((Texture2D)null);
}
protected override void OnProcess(RenderContext context)
{
context.ThrowIfCameraMissing();
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
var cameraNode = context.CameraNode;
var source = context.SourceTexture;
var target = context.RenderTarget;
var viewport = context.Viewport;
if (Quality == 0)
{
// No ambient occlusion.
if (!CombineWithSource)
{
// CombineWithSource is not set. --> Simply clear the render target to white.
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
graphicsDevice.Clear(Color.White);
}
else
{
// Copy source image to target.
_copyFilter.Process(context);
}
return;
}
// Try to get downsampled depth buffer from render context.
// If we cannot find it in the render context, we downsample it manually.
Texture2D downsampledDepthTexture = null;
RenderTarget2D downsampledDepthTarget = null;
if (DownsampleFactor == 2)
{
object dummy;
if (context.Data.TryGetValue(RenderContextKeys.DepthBufferHalf, out dummy))
{
downsampledDepthTexture = dummy as Texture2D;
}
}
if (downsampledDepthTexture == null)
{
context.ThrowIfGBuffer0Missing();
if (DownsampleFactor == 1)
{
downsampledDepthTexture = context.GBuffer0;
}
else
{
// Downsample manually.
// If we do not downsample the depth target, we get artifacts (strange horizontal and vertical
// lines). TODO: Check what causes the artifacts and try to remove the downsampling.
downsampledDepthTarget = renderTargetPool.Obtain2D(new RenderTargetFormat(
context.GBuffer0.Width / DownsampleFactor,
context.GBuffer0.Height / DownsampleFactor,
false,
context.GBuffer0.Format,
DepthFormat.None));
context.SourceTexture = context.GBuffer0;
context.RenderTarget = downsampledDepthTarget;
context.Viewport = new Viewport(0, 0, downsampledDepthTarget.Width, downsampledDepthTarget.Height);
_downsampleFilter.Process(context);
downsampledDepthTexture = downsampledDepthTarget;
}
}
// We use two temporary render targets.
// We do not use a floating point format because float textures cannot use hardware filtering.
RenderTarget2D temp0;
if (!CombineWithSource && target != null &&
target.Width == context.GBuffer0.Width / DownsampleFactor &&
target.Height == context.GBuffer0.Height / DownsampleFactor &&
Strength < 1)
{
// If we do not have to combine the AO result with the source image, and if the target
// image has the half resolution, then we can use the target image directly and do not
// need a temporary render target.
// Also, a Strength > 1 is always applied in a separate pass because applying a Strength
// > 1 before the blur has no effect.
temp0 = target;
}
else
{
temp0 = renderTargetPool.Obtain2D(new RenderTargetFormat(
context.GBuffer0.Width / DownsampleFactor,
context.GBuffer0.Height / DownsampleFactor,
false,
SurfaceFormat.Color,
DepthFormat.None));
}
// Create SSAO.
graphicsDevice.SetRenderTarget(temp0);
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_farParameter.SetValue(cameraNode.Camera.Projection.Far);
_radiusParameter.SetValue((Vector2)Radii);
_maxDistancesParameter.SetValue((Vector2)MaxDistances);
_strengthParameter.SetValue(Strength < 1 ? Strength : 1);
_gBuffer0Parameter.SetValue(downsampledDepthTexture);
if (Quality == 1)
{
_createLinesAPass.Apply();
}
else
{
_createLinesBPass.Apply();
}
graphicsDevice.DrawFullScreenQuad();
if (UseEdgeAwareBlur)
{
RenderTarget2D temp1 = renderTargetPool.Obtain2D(new RenderTargetFormat(
context.GBuffer0.Width / DownsampleFactor,
context.GBuffer0.Height / DownsampleFactor,
false,
SurfaceFormat.Color,
DepthFormat.None));
for (int i = 0; i < NumberOfBlurPasses; i++)
{
// Blur horizontally.
// Note: We use a bilateral filter which is not separable - but the results are still ok
// if we use separate the horizontal and vertical blur.
graphicsDevice.SetRenderTarget(temp1);
_occlusionTextureParameter.SetValue(temp0);
_blurHorizontalPass.Apply();
graphicsDevice.DrawFullScreenQuad();
// Blur vertically.
graphicsDevice.SetRenderTarget(temp0);
_occlusionTextureParameter.SetValue(temp1);
_blurVerticalPass.Apply();
graphicsDevice.DrawFullScreenQuad();
}
// A few render targets are not needed anymore.
renderTargetPool.Recycle(downsampledDepthTarget);
renderTargetPool.Recycle(temp1);
}
else
{
// A few render targets are not needed anymore.
renderTargetPool.Recycle(downsampledDepthTarget);
context.SourceTexture = temp0;
context.RenderTarget = temp0;
context.Viewport = new Viewport(0, 0, temp0.Width, temp0.Height);
for (int i = 0; i < NumberOfBlurPasses; i++)
{
_blur.Process(context);
}
}
_strengthParameter.SetValue(Strength > 1 ? Strength : 1);
if (CombineWithSource)
{
if (TextureHelper.IsFloatingPointFormat(source.Format))
{
graphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
}
else
{
graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp;
}
// Combine with scene.
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_occlusionTextureParameter.SetValue(temp0);
_sourceTextureParameter.SetValue(source);
_combinePass.Apply();
graphicsDevice.DrawFullScreenQuad();
}
else
{
if (temp0 != target)
{
graphicsDevice.SetRenderTarget(target);
graphicsDevice.Viewport = viewport;
_viewportSizeParameter.SetValue(new Vector2(graphicsDevice.Viewport.Width, graphicsDevice.Viewport.Height));
_occlusionTextureParameter.SetValue(temp0);
_copyPass.Apply();
graphicsDevice.DrawFullScreenQuad();
}
}
// Clean-up
if (temp0 != target)
{
renderTargetPool.Recycle(temp0);
}
_sourceTextureParameter.SetValue((Texture2D)null);
_gBuffer0Parameter.SetValue((Texture2D)null);
_occlusionTextureParameter.SetValue((Texture2D)null);
context.SourceTexture = source;
context.RenderTarget = target;
context.Viewport = viewport;
}