// Naive approach: 4 passes. (Reference version)
private void DrawCoreNaive(RenderDrawContext context)
{
var originalTexture = GetSafeInput(0);
var outputTexture = GetSafeOutput(0);
var tapNumber = 2 * tapCount - 1;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.Count, tapCount);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.TotalTap, tapNumber);
directionalBlurEffect.EffectInstance.UpdateEffect(context.GraphicsDevice);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Radius, Radius);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.TapWeights, tapWeights);
// Blur in one direction
var blurAngle = Phase;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var firstBlurTexture = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, originalTexture);
directionalBlurEffect.SetOutput(firstBlurTexture);
directionalBlurEffect.Draw((RenderDrawContext)context, "McIntoshBokehPass1_tap{0}_radius{1}", tapNumber, (int)Radius);
// Diagonal blur A
blurAngle = MathUtil.Pi / 3f + Phase;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var diagonalBlurA = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, firstBlurTexture);
directionalBlurEffect.SetOutput(diagonalBlurA);
directionalBlurEffect.Draw((RenderDrawContext)context, "McIntoshBokehPass2A_tap{0}_radius{1}", tapNumber, (int)Radius);
// Diagonal blur B
blurAngle = -MathUtil.Pi / 3f + Phase;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var diagonalBlurB = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, firstBlurTexture);
directionalBlurEffect.SetOutput(diagonalBlurB);
directionalBlurEffect.Draw((RenderDrawContext)context, "McIntoshBokehPass2B_tap{0}_radius{1}", tapNumber, (int)Radius);
// Final pass outputting the min of A and B
finalCombineEffect.SetInput(0, diagonalBlurA);
finalCombineEffect.SetInput(1, diagonalBlurB);
finalCombineEffect.SetOutput(outputTexture);
finalCombineEffect.Draw(context, name: "McIntoshBokehPassCombine");
}
public void Draw(RenderDrawContext context, float sigmaRatio, Texture inputTexture, Texture outputTexture)
{
// Check if we need to regenerate offsetsWeights
if (offsetsWeights == null || this.sigmaRatio != sigmaRatio)
{
offsetsWeights = GaussianUtil.Calculate1D(Radius, sigmaRatio);
// Update parameters
blurH.Parameters.Set(GaussianBlurShaderKeys.OffsetsWeights, offsetsWeights);
blurV.Parameters.Set(GaussianBlurShaderKeys.OffsetsWeights, offsetsWeights);
this.sigmaRatio = sigmaRatio;
}
// Get a temporary texture for the intermediate pass
// This texture will be allocated only in the scope of this draw and returned to the pool at the exit of this method
var desc = inputTexture.Description;
desc.MultisampleCount = MultisampleCount.None; // TODO we should have a method to get a non-multisampled RT
var outputTextureH = gaussianBlur.NewScopedRenderTarget2D(desc);
// Horizontal pass
blurH.SetInput(inputTexture);
blurH.SetOutput(outputTextureH);
blurH.Draw(context, nameGaussianBlurH);
// Vertical pass
blurV.SetInput(outputTextureH);
blurV.SetOutput(outputTexture);
blurV.Draw(context, nameGaussianBlurV);
}
protected override void DrawCore(RenderDrawContext context)
{
// Update the weight array if necessary
if (weightsDirty || tapCount == 0)
{
weightsDirty = false;
Vector2[] gaussianWeights = GaussianUtil.Calculate1D((int)Radius, 2f, true);
tapCount = gaussianWeights.Length;
tapWeights = new float[tapCount];
for (int i = 0; i < tapCount; i++)
{
tapWeights[i] = gaussianWeights[i].Y;
}
}
var originalTexture = GetSafeInput(0);
var outputTexture = GetSafeOutput(0);
var tapNumber = 2 * tapCount - 1;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.Count, tapCount);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.TotalTap, tapNumber);
directionalBlurEffect.EffectInstance.UpdateEffect(context.GraphicsDevice);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Radius, Radius);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.TapWeights, tapWeights);
// Blur in one direction
var blurAngle = 0f;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var firstBlurTexture = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, originalTexture);
directionalBlurEffect.SetOutput(firstBlurTexture);
directionalBlurEffect.Draw(context, "GaussianBokehPass1_tap{0}_radius{1}", tapNumber, (int)Radius);
// Second blur pass to ouput the final result
blurAngle = MathUtil.PiOverTwo;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
directionalBlurEffect.SetInput(0, firstBlurTexture);
directionalBlurEffect.SetOutput(outputTexture);
directionalBlurEffect.Draw(context, "GaussianBokehPass2_tap{0}_radius{1}", tapNumber, (int)Radius);
}
protected override void DrawCore(RenderDrawContext context)
{
var input = GetInput(0);
var output = GetOutput(0);
if (FadeOutSpeed == 0f)
{
// Nothing to do
if (input != output)
{
context.CommandList.Copy(input, output);
}
return;
}
if (input == output)
{
var newInput = NewScopedRenderTarget2D(input.Description);
context.CommandList.Copy(input, newInput);
input = newInput;
}
// Check we have a render target to hold the persistence over a few frames
if (persistenceTexture == null || persistenceTexture.Description != output.Description)
{
// We need to re-allocate the texture
if (persistenceTexture != null)
{
Context.Allocator.ReleaseReference(persistenceTexture);
}
persistenceTexture = Context.Allocator.GetTemporaryTexture2D(output.Description);
// Initializes to black
context.CommandList.Clear(persistenceTexture, Color.Black);
}
var accumulationPersistence = NewScopedRenderTarget2D(persistenceTexture.Description);
// For persistence, we combine the current brightness with the one of the previous frames.
bloomAfterimageShader.Parameters.Set(BloomAfterimageShaderKeys.FadeOutSpeed, FadeOutSpeed);
bloomAfterimageShader.Parameters.Set(BloomAfterimageShaderKeys.Sensitivity, Sensitivity / 100f);
bloomAfterimageShader.SetInput(0, input);
bloomAfterimageShader.SetInput(1, persistenceTexture);
bloomAfterimageShader.SetOutput(accumulationPersistence);
bloomAfterimageShader.Draw(context, "Afterimage persistence accumulation");
// Keep the final brightness buffer for the following frames
context.CommandList.Copy(accumulationPersistence, persistenceTexture);
// Merge persistence and current bloom into the final result
bloomAfterimageCombineShader.SetInput(0, input);
bloomAfterimageCombineShader.SetInput(1, persistenceTexture);
bloomAfterimageCombineShader.SetOutput(output);
bloomAfterimageCombineShader.Draw(context, "Afterimage persistence combine");
}
protected override void DrawCore(RenderDrawContext context)
{
// Updates the weight array if necessary
if (weightsDirty || tapCount == 0)
{
weightsDirty = false;
Vector2[] gaussianWeights = GaussianUtil.Calculate1D((int)radius, 2f, true);
tapCount = gaussianWeights.Length;
tapWeights = gaussianWeights;
}
var originalTexture = GetSafeInput(0);
var outputTexture = GetSafeOutput(0);
cocBlurEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.Count, tapCount);
cocBlurEffect.EffectInstance.UpdateEffect(context.GraphicsDevice);
cocBlurEffect.Parameters.Set(CoCMapBlurShaderKeys.Radius, radius);
cocBlurEffect.Parameters.Set(CoCMapBlurShaderKeys.OffsetsWeights, tapWeights);
var tapNumber = 2 * tapCount - 1;
// Blur in one direction
var blurAngle = 0f;
cocBlurEffect.Parameters.Set(CoCMapBlurShaderKeys.Direction, new Vector2(MathF.Cos(blurAngle), MathF.Sin(blurAngle)));
var firstBlurTexture = NewScopedRenderTarget2D(originalTexture.Description);
cocBlurEffect.SetInput(0, originalTexture);
cocBlurEffect.SetOutput(firstBlurTexture);
cocBlurEffect.Draw(context, "CoCMapBlurPass1_tap{0}_radius{1}", tapNumber, (int)radius);
// Second blur pass to ouput the final result
blurAngle = MathUtil.PiOverTwo;
cocBlurEffect.Parameters.Set(CoCMapBlurShaderKeys.Direction, new Vector2(MathF.Cos(blurAngle), MathF.Sin(blurAngle)));
cocBlurEffect.SetInput(0, firstBlurTexture);
cocBlurEffect.SetOutput(outputTexture);
cocBlurEffect.Draw(context, "CoCMapBlurPass2_tap{0}_radius{1}", tapNumber, (int)radius);
}
// Optimized approach: 2 passes.
private void DrawCoreOptimized(RenderDrawContext context)
{
var originalTexture = GetSafeInput(0);
var outputTexture = GetSafeOutput(0);
var tapNumber = 2 * tapCount - 1;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.Count, tapCount);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.TotalTap, tapNumber);
directionalBlurEffect.EffectInstance.UpdateEffect(context.GraphicsDevice);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Radius, Radius);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.TapWeights, tapWeights);
// Blur in one direction
var blurAngle = Phase;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var firstBlurTexture = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, originalTexture);
directionalBlurEffect.SetOutput(firstBlurTexture);
directionalBlurEffect.Draw((RenderDrawContext)context, "McIntoshBokehPass1_tap{0}_radius{1}", tapNumber, (int)Radius);
// Calculates the 2 diagonal blurs and keep the min of them
var diagonalBlurAngleA = +MathUtil.Pi / 3f + Phase;
var diagonalBlurAngleB = -MathUtil.Pi / 3f + Phase;
optimizedEffect.SetInput(0, firstBlurTexture);
optimizedEffect.SetOutput(outputTexture);
optimizedEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.Count, tapCount);
optimizedEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.TotalTap, tapNumber);
optimizedEffect.EffectInstance.UpdateEffect(context.GraphicsDevice);
optimizedEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Radius.ComposeWith("directionalBlurA"), Radius);
optimizedEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction.ComposeWith("directionalBlurA"), new Vector2((float)Math.Cos(diagonalBlurAngleA), (float)Math.Sin(diagonalBlurAngleA)));
optimizedEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.TapWeights.ComposeWith("directionalBlurA"), tapWeights);
optimizedEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Radius.ComposeWith("directionalBlurB"), Radius);
optimizedEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction.ComposeWith("directionalBlurB"), new Vector2((float)Math.Cos(diagonalBlurAngleB), (float)Math.Sin(diagonalBlurAngleB)));
optimizedEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.TapWeights.ComposeWith("directionalBlurB"), tapWeights);
optimizedEffect.Draw((RenderDrawContext)context, "McIntoshBokehPass2_BlurABCombine_tap{0}_radius{1}", tapNumber, (int)Radius);
}
protected override void DrawCore(RenderDrawContext context)
{
Texture color = GetInput(0);
Texture output = GetOutput(0);
if (color is null || output is null || depthTexture is null)
{
return;
}
fogFilter.Parameters.Set(FogEffectKeys.FogColor, Color);
fogFilter.Parameters.Set(FogEffectKeys.Density, Density);
fogFilter.Parameters.Set(FogEffectKeys.DepthTexture, depthTexture);
fogFilter.Parameters.Set(FogEffectKeys.zFar, zMax);
fogFilter.Parameters.Set(FogEffectKeys.zNear, zMin);
fogFilter.Parameters.Set(FogEffectKeys.FogStart, FogStart);
fogFilter.Parameters.Set(FogEffectKeys.skipBackground, SkipBackground);
fogFilter.SetInput(0, color);
fogFilter.SetOutput(output);
fogFilter.Draw(context);
}
protected override void DrawCore(RenderDrawContext context)
{
Texture color = GetInput(0);
Texture output = GetOutput(0);
if (color is null || output is null || depthTexture is null)
{
return;
}
outlineFilter.Parameters.Set(OutlineEffectKeys.ScreenDiffs, new Vector2(0.5f / color.Width, 0.5f / color.Height));
outlineFilter.Parameters.Set(OutlineEffectKeys.DepthTexture, depthTexture);
outlineFilter.Parameters.Set(OutlineEffectKeys.zFar, zMax);
outlineFilter.Parameters.Set(OutlineEffectKeys.zNear, zMin);
outlineFilter.Parameters.Set(OutlineEffectKeys.NormalWeight, NormalWeight);
outlineFilter.Parameters.Set(OutlineEffectKeys.DepthWeight, DepthWeight);
outlineFilter.Parameters.Set(OutlineEffectKeys.NormalNearCutoff, NormalNearCutoff);
outlineFilter.SetInput(0, color);
outlineFilter.SetOutput(output);
outlineFilter.Draw(context);
}
protected override void DrawCore(RenderDrawContext context)
{
var originalColorBuffer = GetSafeInput(0);
var originalDepthBuffer = GetSafeInput(1);
var outputTexture = GetSafeOutput(0);
if (configurationDirty)
{
SetupTechnique();
}
// Preparation phase: create different downscaled versions of the original image, later needed by the bokeh blur shaders.
// TODO use ImageMultiScaler instead?
downscaledSources.Clear();
// First we linearize the depth and compute the CoC map based on the user lens configuration.
// Render target will contain "CoC"(16 bits) "Linear depth"(16bits).
var cocLinearDepthTexture = GetScopedRenderTarget(originalColorBuffer.Description, 1f, PixelFormat.R16G16_Float);
var renderView = context.RenderContext.RenderView;
var farPlane = renderView.FarClipPlane;
var depthAreas = DOFAreas;
if (AutoFocus)
{
// TODO replace this by physical camera parameters (aperture, focus distance...)
var diffToTarget = (autoFocusDistanceTarget - autoFocusDistanceCurrent);
var maxAmplitude = farPlane * 0.2f;
diffToTarget = MathUtil.Clamp(diffToTarget, -maxAmplitude, maxAmplitude);
autoFocusDistanceCurrent = autoFocusDistanceCurrent + 0.1f * diffToTarget;
if (autoFocusDistanceCurrent < renderView.NearClipPlane * 2.0f)
{
autoFocusDistanceCurrent = renderView.NearClipPlane * 2.0f;
}
depthAreas = new Vector4(renderView.NearClipPlane, autoFocusDistanceCurrent, autoFocusDistanceCurrent, autoFocusDistanceCurrent + farPlane * 0.5f);
}
coclinearDepthMapEffect.SetInput(0, originalDepthBuffer);
coclinearDepthMapEffect.SetOutput(cocLinearDepthTexture);
coclinearDepthMapEffect.Parameters.Set(CircleOfConfusionKeys.depthAreas, ref depthAreas);
coclinearDepthMapEffect.Parameters.Set(CameraKeys.ZProjection, CameraKeys.ZProjectionACalculate(renderView.NearClipPlane, renderView.FarClipPlane));
coclinearDepthMapEffect.Draw(context, "CoC_LinearDepth");
if (AutoFocus)
{
// Reads the center depth of the previous frame and use it as a new target
// TODO single pixel is really small, average some disk area instead?
pointDepthShader.Parameters.Set(PointDepthKeys.Coordinate, new Vector2(0.5f, 0.5f));
pointDepthShader.SetInput(cocLinearDepthTexture);
pointDepthShader.SetOutput(depthCenter1x1);
pointDepthShader.Draw(context, "Center Depth");
depthReadBack.SetInput(depthCenter1x1);
depthReadBack.Draw(context, "Center_Depth_Readback");
var centerDepth = depthReadBack.Result[0];
autoFocusDistanceTarget = centerDepth;
}
// Find the smallest downscale we should go down to.
var maxDownscale = 0;
foreach (var cocLevel in cocLevels)
{
if (cocLevel.DownscaleFactor > maxDownscale)
{
maxDownscale = cocLevel.DownscaleFactor;
}
}
// Create a series of downscale, with anti-bleeding treatment
for (int i = 0; i <= maxDownscale; i++)
{
var downSizedTexture = originalColorBuffer;
if (i > 0)
{
downSizedTexture = GetScopedRenderTarget(originalColorBuffer.Description, 1f / (float)Math.Pow(2f, i), originalColorBuffer.Description.Format);
textureScaler.SetInput(0, downscaledSources[i - 1]);
textureScaler.SetOutput(downSizedTexture);
textureScaler.Draw(context, "DownScale_Factor{0}", i);
}
downscaledSources[i] = downSizedTexture;
}
// We create a blurred version of the CoC map.
// This is useful to avoid silhouettes appearing when the CoC changes abruptly.
var blurredCoCTexture = NewScopedRenderTarget2D(cocLinearDepthTexture.Description);
cocMapBlur.Radius = 6f / 720f * cocLinearDepthTexture.Description.Height; // 6 pixels at 720p
cocMapBlur.SetInput(0, cocLinearDepthTexture);
cocMapBlur.SetOutput(blurredCoCTexture);
cocMapBlur.Draw(context, "CoC_BlurredMap");
// Creates all the levels with different CoC strengths.
// (Skips level with CoC 0 which is always the original buffer.)
combineLevelsEffect.Parameters.Set(CombineLevelsFromCoCKeys.LevelCount, cocLevels.Count);
combineLevelsEffect.SetInput(0, cocLinearDepthTexture);
combineLevelsEffect.SetInput(1, blurredCoCTexture);
combineLevelsEffect.SetInput(2, originalColorBuffer);
combineLevelsFrontEffect.Parameters.Set(CombineLevelsFromCoCKeys.LevelCount, cocLevels.Count);
combineLevelsFrontEffect.SetInput(0, cocLinearDepthTexture);
combineLevelsFrontEffect.SetInput(1, blurredCoCTexture);
combineLevelsFrontEffect.SetInput(2, originalColorBuffer);
float previousCoC = 0f;
for (int i = 1; i < cocLevels.Count; i++)
{
// We render a blurred version of the original scene into a downscaled render target.
// Blur strength depends on the current level CoC value.
var levelConfig = cocLevels[i];
var textureToBlur = downscaledSources[levelConfig.DownscaleFactor];
float downscaleFactor = 1f / (float)(Math.Pow(2f, levelConfig.DownscaleFactor));
var blurOutput = GetScopedRenderTarget(originalColorBuffer.Description, downscaleFactor, originalColorBuffer.Description.Format);
var blurOutputFront = NewScopedRenderTarget2D(blurOutput.Description);
float blurRadius = (MaxBokehSize * BokehSizeFactor) * levelConfig.CoCValue * downscaleFactor * originalColorBuffer.Width;
if (blurRadius < 1f)
{
blurRadius = 1f;
}
//---------------------------------
// Far out-of-focus
//---------------------------------
// Pre-process the layer for the current CoC
// This removes areas which might wrongly bleed into our image when blurring.
var alphaTextureToBlur = NewScopedRenderTarget2D(textureToBlur.Description);
thresholdAlphaCoC.Parameters.Set(ThresholdAlphaCoCKeys.CoCReference, previousCoC);
thresholdAlphaCoC.Parameters.Set(ThresholdAlphaCoCKeys.CoCCurrent, levelConfig.CoCValue);
thresholdAlphaCoC.SetInput(0, textureToBlur);
thresholdAlphaCoC.SetInput(1, cocLinearDepthTexture);
thresholdAlphaCoC.SetOutput(alphaTextureToBlur);
thresholdAlphaCoC.Draw(context, "Alphaize_Far_{0}", i);
textureToBlur = alphaTextureToBlur;
// TODO Quality up: make the opaque areas "bleed" into the areas we just made transparent
// Apply the bokeh blur effect
BokehBlur levelBlur = levelConfig.BlurEffect;
levelBlur.CoCStrength = levelConfig.CoCValue;
levelBlur.Radius = blurRadius; // This doesn't generate garbage if the radius value doesn't change.
levelBlur.SetInput(0, textureToBlur);
levelBlur.SetOutput(blurOutput);
levelBlur.Draw(context, "CoC_LoD_Layer_Far_{0}", i);
combineLevelsEffect.SetInput(i + 2, blurOutput);
//---------------------------------
// Near out-of-focus
//---------------------------------
// Negates CoC values and makes background objects transparent
thresholdAlphaCoCFront.Parameters.Set(ThresholdAlphaCoCFrontKeys.CoCReference, previousCoC);
thresholdAlphaCoCFront.Parameters.Set(ThresholdAlphaCoCFrontKeys.CoCCurrent, levelConfig.CoCValue);
thresholdAlphaCoCFront.SetInput(0, downscaledSources[levelConfig.DownscaleFactor]);
thresholdAlphaCoCFront.SetInput(1, cocLinearDepthTexture);
thresholdAlphaCoCFront.SetOutput(alphaTextureToBlur);
thresholdAlphaCoCFront.Draw(context, "Alphaize_Near_{0}", i);
textureToBlur = alphaTextureToBlur;
// Apply the bokeh blur effect
levelBlur.SetInput(0, textureToBlur);
levelBlur.SetOutput(blurOutputFront);
levelBlur.Draw(context, "CoC_LoD_Layer_Near_{0}", i);
combineLevelsFrontEffect.SetInput(i + 2, blurOutputFront);
previousCoC = levelConfig.CoCValue;
}
// Far out-of-focus: each pixel, depending on its CoC, interpolates its color from
// the original color buffer and blurred buffer(s).
combineLevelsEffect.Parameters.Set(CombineLevelsFromCoCShaderKeys.CoCLevelValues, combineShaderCocLevelValues);
combineLevelsEffect.SetOutput(outputTexture);
combineLevelsEffect.Draw(context, "CoCLevelCombineInterpolation");
// Finally add front out-of-focus objects on the top of the scene
// TODO Quality up: instead of merging all the layers for each pixel, merge only
// the relevant layer(s) closest to the pixel CoC.
combineLevelsFrontEffect.SetOutput(outputTexture);
combineLevelsFrontEffect.Draw(context, "CoCLevelCombineInterpolationFront");
// Release any reference
downscaledSources.Clear();
}
protected override void DrawCore(RenderDrawContext context)
{
// Inputs:
Texture colorBuffer = GetSafeInput(0);
Texture depthBuffer = GetSafeInput(1);
Texture normalsBuffer = GetSafeInput(2);
Texture specularRoughnessBuffer = GetSafeInput(3);
// Output:
Texture outputBuffer = GetSafeOutput(0);
// Prepare
var temporalCache = Prepare(context, outputBuffer);
FlushCache(context.RenderContext.Time.FrameCount);
// Get temporary buffers
var rayTraceBuffersSize = GetBufferResolution(outputBuffer, RayTracePassResolution);
var resolveBuffersSize = GetBufferResolution(outputBuffer, ResolvePassResolution);
Texture rayTraceBuffer = NewScopedRenderTarget2D(rayTraceBuffersSize.Width, rayTraceBuffersSize.Height, RayTraceTargetFormat, 1);
Texture resolveBuffer = NewScopedRenderTarget2D(resolveBuffersSize.Width, resolveBuffersSize.Height, ReflectionsFormat, 1);
// Check if resize depth
Texture smallerDepthBuffer = depthBuffer;
if (DepthResolution != ResolutionMode.Full)
{
// Smaller depth buffer improves ray tracing performance.
var depthBuffersSize = GetBufferResolution(depthBuffer, DepthResolution);
smallerDepthBuffer = NewScopedRenderTarget2D(depthBuffersSize.Width, depthBuffersSize.Height, PixelFormat.R32_Float, 1);
depthPassShader.SetInput(0, depthBuffer);
depthPassShader.SetOutput(smallerDepthBuffer);
depthPassShader.Draw(context, "Downscale Depth");
}
// Blur Pass
Texture blurPassBuffer;
if (UseColorBufferMips)
{
// Note: using color buffer mips maps helps with reducing artifacts
// and improves resolve pass performance (faster color texture lookups, less cache misses)
// Also for high surface roughness values it adds more blur to the reflection tail which looks more realistic.
// Get temp targets
var colorBuffersSize = new Size2(outputBuffer.Width / 2, outputBuffer.Height / 2);
int colorBuffersMips = Texture.CalculateMipMapCount(MipMapCount.Auto, colorBuffersSize.Width, colorBuffersSize.Height);
Texture colorBuffer0 = NewScopedRenderTarget2D(colorBuffersSize.Width, colorBuffersSize.Height, ReflectionsFormat, colorBuffersMips);
Texture colorBuffer1 = NewScopedRenderTarget2D(colorBuffersSize.Width / 2, colorBuffersSize.Height / 2, ReflectionsFormat, colorBuffersMips - 1);
int colorBuffer1MipOffset = 1; // For colorBuffer1 we could use one mip less (optimized)
// Cache per color buffer mip views
int colorBuffer0Mips = colorBuffer0.MipLevels;
if (cachedColorBuffer0Mips == null || cachedColorBuffer0Mips.Length != colorBuffer0Mips || cachedColorBuffer0Mips[0].ParentTexture != colorBuffer0)
{
cachedColorBuffer0Mips?.ForEach(view => view?.Dispose());
cachedColorBuffer0Mips = new Texture[colorBuffer0Mips];
for (int mipIndex = 0; mipIndex < colorBuffer0Mips; mipIndex++)
{
cachedColorBuffer0Mips[mipIndex] = colorBuffer0.ToTextureView(ViewType.Single, 0, mipIndex);
}
}
int colorBuffer1Mips = colorBuffer1.MipLevels;
if (cachedColorBuffer1Mips == null || cachedColorBuffer1Mips.Length != colorBuffer1Mips || cachedColorBuffer1Mips[0].ParentTexture != colorBuffer1)
{
cachedColorBuffer1Mips?.ForEach(view => view?.Dispose());
cachedColorBuffer1Mips = new Texture[colorBuffer1Mips];
for (int mipIndex = 0; mipIndex < colorBuffer1Mips; mipIndex++)
{
cachedColorBuffer1Mips[mipIndex] = colorBuffer1.ToTextureView(ViewType.Single, 0, mipIndex);
}
}
// Clone scene frame to mip 0 of colorBuffer0
Scaler.SetInput(0, colorBuffer);
Scaler.SetOutput(cachedColorBuffer0Mips[0]);
Scaler.Draw(context, "Copy frame");
// Downscale with gaussian blur
for (int mipLevel = 1; mipLevel < colorBuffersMips; mipLevel++)
{
// Blur H
var srcMip = cachedColorBuffer0Mips[mipLevel - 1];
var dstMip = cachedColorBuffer1Mips[mipLevel - colorBuffer1MipOffset];
blurPassShaderH.SetInput(0, srcMip);
blurPassShaderH.SetOutput(dstMip);
blurPassShaderH.Draw(context, "Blur H");
// Blur V
srcMip = dstMip;
dstMip = cachedColorBuffer0Mips[mipLevel];
blurPassShaderV.SetInput(0, srcMip);
blurPassShaderV.SetOutput(dstMip);
blurPassShaderV.Draw(context, "Blur V");
}
blurPassBuffer = colorBuffer0;
}
else
{
// Don't use color buffer with mip maps
blurPassBuffer = colorBuffer;
cachedColorBuffer0Mips?.ForEach(view => view?.Dispose());
cachedColorBuffer1Mips?.ForEach(view => view?.Dispose());
}
// Ray Trace Pass
rayTracePassShader.SetInput(0, colorBuffer);
rayTracePassShader.SetInput(1, smallerDepthBuffer);
rayTracePassShader.SetInput(2, normalsBuffer);
rayTracePassShader.SetInput(3, specularRoughnessBuffer);
rayTracePassShader.SetOutput(rayTraceBuffer);
rayTracePassShader.Draw(context, "Ray Trace");
// Resolve Pass
resolvePassShader.SetInput(0, blurPassBuffer);
resolvePassShader.SetInput(1, ResolvePassResolution == ResolutionMode.Full ? depthBuffer : smallerDepthBuffer);
resolvePassShader.SetInput(2, normalsBuffer);
resolvePassShader.SetInput(3, specularRoughnessBuffer);
resolvePassShader.SetInput(4, rayTraceBuffer);
resolvePassShader.SetOutput(resolveBuffer);
resolvePassShader.Draw(context, "Resolve");
// Temporal Pass
Texture reflectionsBuffer = resolveBuffer;
if (TemporalEffect)
{
var temporalSize = outputBuffer.Size;
temporalCache.Resize(GraphicsDevice, ref temporalSize);
Texture temporalBuffer0 = NewScopedRenderTarget2D(temporalSize.Width, temporalSize.Height, ReflectionsFormat, 1);
temporalPassShader.SetInput(0, resolveBuffer);
temporalPassShader.SetInput(1, temporalCache.TemporalBuffer);
temporalPassShader.SetInput(2, depthBuffer);
temporalPassShader.SetOutput(temporalBuffer0);
temporalPassShader.Draw(context, "Temporal");
context.CommandList.Copy(temporalBuffer0, temporalCache.TemporalBuffer); // TODO: use Texture.Swap from ContentStreaming branch to make it faster!
reflectionsBuffer = temporalCache.TemporalBuffer;
}
// Combine Pass
combinePassShader.SetInput(0, colorBuffer);
combinePassShader.SetInput(1, depthBuffer);
combinePassShader.SetInput(2, normalsBuffer);
combinePassShader.SetInput(3, specularRoughnessBuffer);
combinePassShader.SetInput(4, reflectionsBuffer);
combinePassShader.SetOutput(outputBuffer);
combinePassShader.Draw(context, "Combine");
#if SSLR_DEBUG
if (DebugMode != DebugModes.None)
{
// Debug preview of temp targets
switch (DebugMode)
{
case DebugModes.RayTrace:
Scaler.SetInput(0, rayTraceBuffer);
break;
case DebugModes.Resolve:
Scaler.SetInput(0, resolveBuffer);
break;
case DebugModes.Temporal:
if (temporalCache != null)
{
Scaler.SetInput(0, temporalCache.TemporalBuffer);
}
break;
}
Scaler.SetOutput(outputBuffer);
Scaler.Draw(context);
}
#endif
}
// Naive approach: 6 passes
protected void DrawCoreNaive(RenderDrawContext context)
{
var originalTexture = GetSafeInput(0);
var outputTexture = GetSafeOutput(0);
if (rhombiTapOffsetsDirty)
{
CalculateRhombiOffsets();
}
var tapNumber = 2 * tapCount - 1;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.Count, tapCount);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurKeys.TotalTap, tapNumber);
directionalBlurEffect.EffectInstance.UpdateEffect(context.GraphicsDevice);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Radius, Radius);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.TapWeights, tapWeights);
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.CoCReference, CoCStrength);
// Vertical blur
var blurAngle = MathUtil.PiOverTwo + Phase;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var verticalBlurTexture = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, originalTexture);
directionalBlurEffect.SetOutput(verticalBlurTexture);
directionalBlurEffect.Draw(context, "TripleRhombiBokeh_RhombiABVertical_tap{0}_radius{1}", tapNumber, (int)Radius);
// Rhombi A (top left)
blurAngle = 7f * MathUtil.Pi / 6f + Phase;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var rhombiA = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, verticalBlurTexture);
directionalBlurEffect.SetOutput(rhombiA);
directionalBlurEffect.Draw(context, "TripleRhombiBokeh_RhombiA_tap{0}_radius{1}", tapNumber, (int)Radius);
// Rhombi B (top right)
blurAngle = -MathUtil.Pi / 6f + Phase;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var rhombiB = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, verticalBlurTexture);
directionalBlurEffect.SetOutput(rhombiB);
directionalBlurEffect.Draw(context, "TripleRhombiBokeh_RhombiB_tap{0}_radius{1}", tapNumber, (int)Radius);
//Rhombi C (bottom)
blurAngle = 7f * MathUtil.Pi / 6f + Phase;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var rhombiCTmp = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, originalTexture);
directionalBlurEffect.SetOutput(rhombiCTmp);
directionalBlurEffect.Draw(context, "TripleRhombiBokeh_RhombiCTmp_tap{0}_radius{1}", tapNumber, (int)Radius);
blurAngle = -MathUtil.Pi / 6f + Phase;
directionalBlurEffect.Parameters.Set(DepthAwareDirectionalBlurUtilKeys.Direction, new Vector2((float)Math.Cos(blurAngle), (float)Math.Sin(blurAngle)));
var rhombiC = NewScopedRenderTarget2D(originalTexture.Description);
directionalBlurEffect.SetInput(0, rhombiCTmp);
directionalBlurEffect.SetOutput(rhombiC);
directionalBlurEffect.Draw(context, "TripleRhombiBokeh_RhombiC_tap{0}_radius{1}", tapNumber, (int)Radius);
// Final pass outputting the average of the 3 blurs
finalCombineEffect.SetInput(0, rhombiA);
finalCombineEffect.SetInput(1, rhombiB);
finalCombineEffect.SetInput(2, rhombiC);
finalCombineEffect.SetOutput(outputTexture);
finalCombineEffect.Parameters.Set(TripleRhombiCombineShaderKeys.RhombiTapOffsets, rhombiTapOffsets);
finalCombineEffect.Draw(context, name: "TripleRhombiBokehCombine");
}
protected override void DrawCore(RenderDrawContext context)
{
var input = GetInput(0);
var output = GetOutput(0);
if (input is null || output is null)
{
return;
}
var inputDepthTexture = GetInput(1); // Depth
// Update the parameters for this post effect
if (!Enabled)
{
if (input != output)
{
Scaler.SetInput(input);
Scaler.SetOutput(output);
Scaler.Draw(context);
}
return;
}
// If input == output, copy the input to a temporary texture
if (input == output)
{
var newInput = NewScopedRenderTarget2D(input.Width, input.Height, input.Format);
context.CommandList.Copy(input, newInput);
input = newInput;
}
var currentInput = input;
// Draw outline before AA
if (Outline.Enabled && inputDepthTexture != null)
{
// Outline
var outlineOutput = NewScopedRenderTarget2D(input.Width, input.Height, input.Format);
Outline.SetColorDepthInput(currentInput, inputDepthTexture, context.RenderContext.RenderView.NearClipPlane, context.RenderContext.RenderView.FarClipPlane);
Outline.SetOutput(outlineOutput);
Outline.Draw(context);
currentInput = outlineOutput;
}
var fxaa = Antialiasing as FXAAEffect;
bool aaFirst = Bloom != null && Bloom.StableConvolution;
bool needAA = Antialiasing != null && Antialiasing.Enabled;
// Do AA here, first. (hybrid method from Karis2013)
if (aaFirst && needAA)
{
// do AA:
if (fxaa != null)
{
fxaa.InputLuminanceInAlpha = true;
}
var bufferIndex = 1;
if (Antialiasing.RequiresDepthBuffer)
{
Antialiasing.SetInput(bufferIndex++, inputDepthTexture);
}
bool requiresVelocityBuffer = Antialiasing.RequiresVelocityBuffer;
if (requiresVelocityBuffer)
{
Antialiasing.SetInput(bufferIndex++, GetInput(6));
}
var aaSurface = NewScopedRenderTarget2D(input.Width, input.Height, input.Format);
if (Antialiasing.NeedRangeDecompress)
{
// Explanation:
// The Karis method (Unreal Engine 4.1x), uses a hybrid pipeline to execute AA.
// The AA is usually done at the end of the pipeline, but we don't benefit from
// AA for the posteffects, which is a shame.
// The Karis method, executes AA at the beginning, but for AA to be correct, it
// must work post tonemapping, and even more in fact, in gamma space too. Plus,
// it waits for the alpha=luma to be a "perceptive luma" so also gamma space.
// In our case, working in gamma space created monstruous outlining artefacts
// around exageratedly strong constrasted objects (way in HDR range).
// So AA works in linear space, but still with gamma luma, as a light tradeoff
// to supress artefacts.
// Create a 16 bits target for FXAA:
// Render range compression & perceptual luma to alpha channel:
rangeCompress.SetInput(currentInput);
rangeCompress.SetOutput(aaSurface);
rangeCompress.Draw(context);
Antialiasing.SetInput(0, aaSurface);
Antialiasing.SetOutput(currentInput);
Antialiasing.Draw(context);
// Reverse tone LDR to HDR:
rangeDecompress.SetInput(currentInput);
rangeDecompress.SetOutput(aaSurface);
rangeDecompress.Draw(context);
}
else
{
Antialiasing.SetInput(0, currentInput);
Antialiasing.SetOutput(aaSurface);
Antialiasing.Draw(context);
}
currentInput = aaSurface;
}
if (AmbientOcclusion.Enabled && inputDepthTexture != null)
{
// Ambient Occlusion
var aoOutput = NewScopedRenderTarget2D(input.Width, input.Height, input.Format);
AmbientOcclusion.SetColorDepthInput(currentInput, inputDepthTexture);
AmbientOcclusion.SetOutput(aoOutput);
AmbientOcclusion.Draw(context);
currentInput = aoOutput;
}
if (LocalReflections.Enabled && inputDepthTexture != null)
{
var normalsBuffer = GetInput(2);
var specularRoughnessBuffer = GetInput(3);
if (normalsBuffer != null && specularRoughnessBuffer != null)
{
// Local reflections
var rlrOutput = NewScopedRenderTarget2D(input.Width, input.Height, input.Format);
LocalReflections.SetInputSurfaces(currentInput, inputDepthTexture, normalsBuffer, specularRoughnessBuffer);
LocalReflections.SetOutput(rlrOutput);
LocalReflections.Draw(context);
currentInput = rlrOutput;
}
}
if (DepthOfField.Enabled && inputDepthTexture != null)
{
// DoF
var dofOutput = NewScopedRenderTarget2D(input.Width, input.Height, input.Format);
DepthOfField.SetColorDepthInput(currentInput, inputDepthTexture);
DepthOfField.SetOutput(dofOutput);
DepthOfField.Draw(context);
currentInput = dofOutput;
}
if (Fog.Enabled && inputDepthTexture != null)
{
// Fog
var fogOutput = NewScopedRenderTarget2D(input.Width, input.Height, input.Format);
Fog.SetColorDepthInput(currentInput, inputDepthTexture, context.RenderContext.RenderView.NearClipPlane, context.RenderContext.RenderView.FarClipPlane);
Fog.SetOutput(fogOutput);
Fog.Draw(context);
currentInput = fogOutput;
}
// Luminance pass (only if tone mapping is enabled)
// TODO: This is not super pluggable to have this kind of dependencies. Check how to improve this
var toneMap = colorTransformsGroup.Transforms.Get <ToneMap>();
if (colorTransformsGroup.Enabled && toneMap != null && toneMap.Enabled)
{
Texture luminanceTexture = null;
if (toneMap.UseLocalLuminance)
{
const int localLuminanceDownScale = 3;
// The luminance chain uses power-of-two intermediate targets, so it expects to output to one as well
var lumWidth = Math.Min(MathUtil.NextPowerOfTwo(currentInput.Size.Width), MathUtil.NextPowerOfTwo(currentInput.Size.Height));
lumWidth = Math.Max(1, lumWidth / 2);
var lumSize = new Size3(lumWidth, lumWidth, 1).Down2(localLuminanceDownScale);
luminanceTexture = NewScopedRenderTarget2D(lumSize.Width, lumSize.Height, PixelFormat.R16_Float, 1);
luminanceEffect.SetOutput(luminanceTexture);
}
luminanceEffect.EnableLocalLuminanceCalculation = toneMap.UseLocalLuminance;
luminanceEffect.SetInput(currentInput);
luminanceEffect.Draw(context);
// Set this parameter that will be used by the tone mapping
colorTransformsGroup.Parameters.Set(LuminanceEffect.LuminanceResult, new LuminanceResult(luminanceEffect.AverageLuminance, luminanceTexture));
}
if (BrightFilter.Enabled && (Bloom.Enabled || LightStreak.Enabled || LensFlare.Enabled))
{
Texture brightTexture = NewScopedRenderTarget2D(currentInput.Width, currentInput.Height, currentInput.Format, 1);
// Bright filter pass
BrightFilter.SetInput(currentInput);
BrightFilter.SetOutput(brightTexture);
BrightFilter.Draw(context);
// Bloom pass
if (Bloom.Enabled)
{
Bloom.SetInput(brightTexture);
Bloom.SetOutput(currentInput);
Bloom.Draw(context);
}
// Light streak pass
if (LightStreak.Enabled)
{
LightStreak.SetInput(brightTexture);
LightStreak.SetOutput(currentInput);
LightStreak.Draw(context);
}
// Lens flare pass
if (LensFlare.Enabled)
{
LensFlare.SetInput(brightTexture);
LensFlare.SetOutput(currentInput);
LensFlare.Draw(context);
}
}
bool aaLast = needAA && !aaFirst;
var toneOutput = aaLast ? NewScopedRenderTarget2D(input.Width, input.Height, input.Format) : output;
// When FXAA is enabled we need to detect whether the ColorTransformGroup should output the Luminance into the alpha or not
var luminanceToChannelTransform = colorTransformsGroup.PostTransforms.Get <LuminanceToChannelTransform>();
if (fxaa != null)
{
if (luminanceToChannelTransform is null)
{
luminanceToChannelTransform = new LuminanceToChannelTransform {
ColorChannel = ColorChannel.A
};
colorTransformsGroup.PostTransforms.Add(luminanceToChannelTransform);
}
// Only enabled when FXAA is enabled and InputLuminanceInAlpha is true
luminanceToChannelTransform.Enabled = fxaa.Enabled && fxaa.InputLuminanceInAlpha;
}
else if (luminanceToChannelTransform != null)
{
luminanceToChannelTransform.Enabled = false;
}
// Color transform group pass (tonemap, color grading)
var lastEffect = colorTransformsGroup.Enabled ? (ImageEffect)colorTransformsGroup : Scaler;
lastEffect.SetInput(currentInput);
lastEffect.SetOutput(toneOutput);
lastEffect.Draw(context);
// Do AA here, last, if not already done.
if (aaLast)
{
Antialiasing.SetInput(toneOutput);
Antialiasing.SetOutput(output);
Antialiasing.Draw(context);
}
}
protected override void DrawCore(RenderDrawContext context)
{
var originalColorBuffer = GetSafeInput(0);
var originalDepthBuffer = GetSafeInput(1);
var outputTexture = GetSafeOutput(0);
var renderView = context.RenderContext.RenderView;
//---------------------------------
// Ambient Occlusion
//---------------------------------
var tempWidth = (originalColorBuffer.Width * (int)TempSize) / (int)TemporaryBufferSize.SizeFull;
var tempHeight = (originalColorBuffer.Height * (int)TempSize) / (int)TemporaryBufferSize.SizeFull;
var aoTexture1 = NewScopedRenderTarget2D(tempWidth, tempHeight, PixelFormat.R8_UNorm, 1);
var aoTexture2 = NewScopedRenderTarget2D(tempWidth, tempHeight, PixelFormat.R8_UNorm, 1);
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOKeys.Count, NumberOfSamples > 0 ? NumberOfSamples : 9);
// check whether the projection matrix is orthographic
var isOrthographic = renderView.Projection.M44 == 1;
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOKeys.IsOrthographic, isOrthographic);
blurH.Parameters.Set(AmbientOcclusionBlurKeys.IsOrthographic, isOrthographic);
blurV.Parameters.Set(AmbientOcclusionBlurKeys.IsOrthographic, isOrthographic);
Vector2 zProj;
if (isOrthographic)
{
zProj = new Vector2(renderView.NearClipPlane, renderView.FarClipPlane - renderView.NearClipPlane);
}
else
{
zProj = CameraKeys.ZProjectionACalculate(renderView.NearClipPlane, renderView.FarClipPlane);
}
// Set Near/Far pre-calculated factors to speed up the linear depth reconstruction
aoRawImageEffect.Parameters.Set(CameraKeys.ZProjection, ref zProj);
Vector4 screenSize = new Vector4(originalColorBuffer.Width, originalColorBuffer.Height, 0, 0);
screenSize.Z = screenSize.X / screenSize.Y;
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOShaderKeys.ScreenInfo, screenSize);
Vector4 projInfo;
if (isOrthographic)
{
// The orthographic scale to map the xy coordinates
float scaleX = 1 / renderView.Projection.M11;
float scaleY = 1 / renderView.Projection.M22;
// Constant factor to map the ProjScale parameter to the orthographic scale
float projZScale = System.Math.Max(scaleX, scaleY) * 4;
projInfo = new Vector4(scaleX, scaleY, projZScale, 0);
}
else
{
// Projection info used to reconstruct the View space position from linear depth
var p00 = renderView.Projection.M11;
var p11 = renderView.Projection.M22;
var p02 = renderView.Projection.M13;
var p12 = renderView.Projection.M23;
projInfo = new Vector4(
-2.0f / (screenSize.X * p00),
-2.0f / (screenSize.Y * p11),
(1.0f - p02) / p00,
(1.0f + p12) / p11);
}
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOShaderKeys.ProjInfo, ref projInfo);
//**********************************
// User parameters
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOShaderKeys.ParamProjScale, ParamProjScale);
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOShaderKeys.ParamIntensity, ParamIntensity);
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOShaderKeys.ParamBias, ParamBias);
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOShaderKeys.ParamRadius, ParamRadius);
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOShaderKeys.ParamRadiusSquared, ParamRadius * ParamRadius);
aoRawImageEffect.SetInput(0, originalDepthBuffer);
aoRawImageEffect.SetOutput(aoTexture1);
aoRawImageEffect.Draw(context, "AmbientOcclusionRawAO");
for (int bounces = 0; bounces < NumberOfBounces; bounces++)
{
if (offsetsWeights == null)
{
offsetsWeights = new[]
{
// 0.356642f, 0.239400f, 0.072410f, 0.009869f,
// 0.398943f, 0.241971f, 0.053991f, 0.004432f, 0.000134f, // stddev = 1.0
0.153170f, 0.144893f, 0.122649f, 0.092902f, 0.062970f, // stddev = 2.0
// 0.111220f, 0.107798f, 0.098151f, 0.083953f, 0.067458f, 0.050920f, 0.036108f, // stddev = 3.0
};
nameGaussianBlurH = string.Format("AmbientOcclusionBlurH{0}x{0}", offsetsWeights.Length);
nameGaussianBlurV = string.Format("AmbientOcclusionBlurV{0}x{0}", offsetsWeights.Length);
}
// Set Near/Far pre-calculated factors to speed up the linear depth reconstruction
blurH.Parameters.Set(CameraKeys.ZProjection, ref zProj);
blurV.Parameters.Set(CameraKeys.ZProjection, ref zProj);
// Update permutation parameters
blurH.Parameters.Set(AmbientOcclusionBlurKeys.Count, offsetsWeights.Length);
blurH.Parameters.Set(AmbientOcclusionBlurKeys.BlurScale, BlurScale);
blurH.Parameters.Set(AmbientOcclusionBlurKeys.EdgeSharpness, EdgeSharpness);
blurH.EffectInstance.UpdateEffect(context.GraphicsDevice);
blurV.Parameters.Set(AmbientOcclusionBlurKeys.Count, offsetsWeights.Length);
blurV.Parameters.Set(AmbientOcclusionBlurKeys.BlurScale, BlurScale);
blurV.Parameters.Set(AmbientOcclusionBlurKeys.EdgeSharpness, EdgeSharpness);
blurV.EffectInstance.UpdateEffect(context.GraphicsDevice);
// Update parameters
blurH.Parameters.Set(AmbientOcclusionBlurShaderKeys.Weights, offsetsWeights);
blurV.Parameters.Set(AmbientOcclusionBlurShaderKeys.Weights, offsetsWeights);
// Horizontal pass
blurH.SetInput(0, aoTexture1);
blurH.SetInput(1, originalDepthBuffer);
blurH.SetOutput(aoTexture2);
blurH.Draw(context, nameGaussianBlurH);
// Vertical pass
blurV.SetInput(0, aoTexture2);
blurV.SetInput(1, originalDepthBuffer);
blurV.SetOutput(aoTexture1);
blurV.Draw(context, nameGaussianBlurV);
}
aoApplyImageEffect.SetInput(0, originalColorBuffer);
aoApplyImageEffect.SetInput(1, aoTexture1);
aoApplyImageEffect.SetOutput(outputTexture);
aoApplyImageEffect.Draw(context, "AmbientOcclusionApply");
}
protected override void DrawCore(RenderDrawContext contextParameters)
{
var input = GetInput(0);
var output = GetOutput(0) ?? input;
if (input == null || StreakCount == 0 || IterationCount == 0)
{
return;
}
// Downscale to 1 / 4
var halfSize = input.Size.Down2();
var halfSizeRenderTarget = NewScopedRenderTarget2D(halfSize.Width, halfSize.Height, input.Format);
Scaler.SetInput(input);
Scaler.SetOutput(halfSizeRenderTarget);
Scaler.Draw(contextParameters, "Downsize to 0.5");
var fourthSize = halfSize.Down2();
var fourthSizeRenderTarget = NewScopedRenderTarget2D(fourthSize.Width, fourthSize.Height, input.Format);
Scaler.SetInput(halfSizeRenderTarget);
Scaler.SetOutput(fourthSizeRenderTarget);
Scaler.Draw(contextParameters, "Downsize to 0.25");
var originalDownsize = fourthSizeRenderTarget;
// Put all the streaks in an accumulation buffer
var accumulationBuffer = NewScopedRenderTarget2D(fourthSizeRenderTarget.Description);
// 2 scratch textures to ping-pong between
var scratchTextureA = NewScopedRenderTarget2D(fourthSizeRenderTarget.Description);
var scratchTextureB = NewScopedRenderTarget2D(fourthSizeRenderTarget.Description);
var writeToScratchA = true;
Vector2 direction;
Texture currentInput = null, currentOutput = null;
Vector3 colorAberration;
colorAberration.X = (float)MathUtil.Lerp(1.0, ColorAberrationCoefficients.X, ColorAberrationStrength);
colorAberration.Y = (float)MathUtil.Lerp(1.0, ColorAberrationCoefficients.Y, ColorAberrationStrength);
colorAberration.Z = (float)MathUtil.Lerp(1.0, ColorAberrationCoefficients.Z, ColorAberrationStrength);
lightStreakEffect.Parameters.Set(LightStreakShaderKeys.ColorAberrationCoefficients, ref colorAberration);
for (int streak = 0; streak < StreakCount; streak++)
{
// Treats one streak
// Direction vector
float angle = MathUtil.DegreesToRadians(Phase) + streak * MathUtil.TwoPi / StreakCount;
direction.X = (float)Math.Cos(angle);
direction.Y = (float)Math.Sin(angle);
// Extends the length recursively
for (int level = 0; level < IterationCount; level++)
{
// Calculates weights and attenuation factors for all the taps
float totalWeight = 0;
float passLength = (float)Math.Pow(TapsPerIteration, level);
for (int i = 0; i < TapsPerIteration; i++)
{
tapOffsetsWeights[i].X = i * passLength;
tapOffsetsWeights[i].Y = (float)Math.Pow(MathUtil.Lerp(0.7f, 1.0f, Attenuation), i * passLength);
totalWeight += tapOffsetsWeights[i].Y;
}
// Normalizes the weights
for (int i = 0; i < TapsPerIteration; i++)
{
tapOffsetsWeights[i].Y /= totalWeight;
}
currentInput = writeToScratchA ? scratchTextureB : scratchTextureA;
if (level == 0)
{
currentInput = originalDownsize;
}
currentOutput = writeToScratchA ? scratchTextureA : scratchTextureB;
lightStreakEffect.Parameters.Set(LightStreakKeys.Count, TapsPerIteration);
lightStreakEffect.Parameters.Set(LightStreakKeys.AnamorphicCount, AnamorphicOffsetsWeights.Length);
lightStreakEffect.Parameters.Set(LightStreakShaderKeys.TapOffsetsWeights, tapOffsetsWeights);
lightStreakEffect.Parameters.Set(LightStreakShaderKeys.AnamorphicOffsetsWeight, AnamorphicOffsetsWeights);
lightStreakEffect.Parameters.Set(LightStreakShaderKeys.Direction, direction);
lightStreakEffect.SetInput(0, currentInput);
lightStreakEffect.SetOutput(currentOutput);
lightStreakEffect.Draw(contextParameters, lightStreakDebugStrings[(streak * IterationCount) + level]);
writeToScratchA = !writeToScratchA;
}
// Writes this streak to the accumulation buffer
if (streak > 0)
{
combiner.BlendState = BlendStates.Additive;
}
combiner.SetInput(0, currentOutput);
combiner.Factors[0] = (1f / StreakCount) * 0.2f * Amount;
combiner.SetOutput(accumulationBuffer);
((RendererBase)combiner).Draw(contextParameters);
combiner.BlendState = BlendStates.Default;
}
// All the light streaks have been drawn to the accumulation buffer.
// Upscales and blurs the accumulation buffer.
var accumulationUpscaled = NewScopedRenderTarget2D(halfSizeRenderTarget.Description);
Scaler.SetInput(accumulationBuffer);
Scaler.SetOutput(accumulationUpscaled);
((RendererBase)Scaler).Draw(contextParameters);
blur.Radius = 3;
blur.SetInput(accumulationUpscaled);
blur.SetOutput(accumulationUpscaled);
((RendererBase)blur).Draw(contextParameters);
// Adds the result to the original color buffer.
Scaler.BlendState = BlendStates.Additive;
Scaler.SetInput(accumulationUpscaled);
Scaler.SetOutput(output);
((RendererBase)Scaler).Draw(contextParameters);
Scaler.BlendState = BlendStates.Default;
}