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();
}
// 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)
{
// 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
}
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);
// Set Near/Far pre-calculated factors to speed up the linear depth reconstruction
aoRawImageEffect.Parameters.Set(CameraKeys.ZProjection, CameraKeys.ZProjectionACalculate(renderView.NearClipPlane, renderView.FarClipPlane));
Vector4 screenSize = new Vector4(originalColorBuffer.Width, originalColorBuffer.Height, 0, 0);
screenSize.Z = screenSize.X / screenSize.Y;
aoRawImageEffect.Parameters.Set(AmbientOcclusionRawAOShaderKeys.ScreenInfo, screenSize);
// Projection infor 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;
Vector4 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, 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
var zProj = CameraKeys.ZProjectionACalculate(renderView.NearClipPlane, renderView.FarClipPlane);
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");
}