//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="GodRayFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public GodRayFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
Effect effect = GraphicsService.Content.Load <Effect>("DigitalRune/PostProcessing/GodRayFilter");
_viewportSizeParameter = effect.Parameters["ViewportSize"];
_parameters0Parameter = effect.Parameters["Parameters0"];
_parameters1Parameter = effect.Parameters["Parameters1"];
_intensityParameter = effect.Parameters["Intensity"];
_numberOfSamplesParameter = effect.Parameters["NumberOfSamples"];
_sourceTextureParameter = effect.Parameters["SourceTexture"];
_gBuffer0Parameter = effect.Parameters["GBuffer0"];
_rayTextureParameter = effect.Parameters["RayTexture"];
_createMaskPass = effect.CurrentTechnique.Passes["CreateMask"];
_blurPass = effect.CurrentTechnique.Passes["Blur"];
_combinePass = effect.CurrentTechnique.Passes["Combine"];
_downsampleFilter = graphicsService.GetDownsampleFilter();
Scale = 1;
LightDirection = new Vector3F(0, -1, 0);
LightRadius = 0.2f;
Intensity = new Vector3F(1, 1, 1);
DownsampleFactor = 4;
NumberOfSamples = 8;
NumberOfPasses = 2;
Softness = 1;
}
//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="LuminanceFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public LuminanceFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load <Effect>("DigitalRune/PostProcessing/LuminanceFilter");
_useGeometricMeanParameter = _effect.Parameters["UseGeometricMean"];
_useAdaptionParameter = _effect.Parameters["UseAdaption"];
_deltaTimeParameter = _effect.Parameters["DeltaTime"];
_adaptionSpeedParameter = _effect.Parameters["AdaptionSpeed"];
_lastLuminanceTextureParameter = _effect.Parameters["LastLuminanceTexture"];
_textureParameter = _effect.Parameters["SourceTexture"];
_sourceSizeParameter = _effect.Parameters["SourceSize"];
_targetSizeParameter = _effect.Parameters["TargetSize"];
_createPass = _effect.CurrentTechnique.Passes["Create"];
_downsamplePass = _effect.CurrentTechnique.Passes["Downsample"];
_finalPass = _effect.CurrentTechnique.Passes["Final"];
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
_copyFilter = PostProcessHelper.GetCopyFilter(graphicsService);
UseGeometricMean = true;
UseAdaption = true;
AdaptionSpeed = 0.02f;
DefaultTargetFormat = new RenderTargetFormat(1, 1, false, SurfaceFormat.HalfVector4, DepthFormat.None);
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="GodRayFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public GodRayFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
Effect effect = GraphicsService.Content.Load<Effect>("DigitalRune/PostProcessing/GodRayFilter");
_viewportSizeParameter = effect.Parameters["ViewportSize"];
_parameters0Parameter = effect.Parameters["Parameters0"];
_parameters1Parameter = effect.Parameters["Parameters1"];
_intensityParameter = effect.Parameters["Intensity"];
_numberOfSamplesParameter = effect.Parameters["NumberOfSamples"];
_sourceTextureParameter = effect.Parameters["SourceTexture"];
_gBuffer0Parameter = effect.Parameters["GBuffer0"];
_rayTextureParameter = effect.Parameters["RayTexture"];
_createMaskPass = effect.CurrentTechnique.Passes["CreateMask"];
_blurPass = effect.CurrentTechnique.Passes["Blur"];
_combinePass = effect.CurrentTechnique.Passes["Combine"];
_downsampleFilter = graphicsService.GetDownsampleFilter();
Scale = 1;
LightDirection = new Vector3F(0, -1, 0);
LightRadius = 0.2f;
Intensity = new Vector3F(1, 1, 1);
DownsampleFactor = 4;
NumberOfSamples = 8;
NumberOfPasses = 2;
Softness = 1;
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="LuminanceFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public LuminanceFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load<Effect>("DigitalRune/PostProcessing/LuminanceFilter");
_useGeometricMeanParameter = _effect.Parameters["UseGeometricMean"];
_useAdaptionParameter = _effect.Parameters["UseAdaption"];
_deltaTimeParameter = _effect.Parameters["DeltaTime"];
_adaptionSpeedParameter = _effect.Parameters["AdaptionSpeed"];
_lastLuminanceTextureParameter = _effect.Parameters["LastLuminanceTexture"];
_textureParameter = _effect.Parameters["SourceTexture"];
_sourceSizeParameter = _effect.Parameters["SourceSize"];
_targetSizeParameter = _effect.Parameters["TargetSize"];
_createPass = _effect.CurrentTechnique.Passes["Create"];
_downsamplePass = _effect.CurrentTechnique.Passes["Downsample"];
_finalPass = _effect.CurrentTechnique.Passes["Final"];
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
_copyFilter = PostProcessHelper.GetCopyFilter(graphicsService);
UseGeometricMean = true;
UseAdaption = true;
AdaptionSpeed = 0.02f;
DefaultTargetFormat = new RenderTargetFormat(1, 1, false, SurfaceFormat.HalfVector4, DepthFormat.None);
}
//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="DepthOfFieldFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public DepthOfFieldFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load <Effect>("DigitalRune/PostProcessing/DepthOfFieldFilter");
_screenSizeParameter = _effect.Parameters["ScreenSize"];
_depthTextureParameter = _effect.Parameters["DepthTexture"];
_nearBlurDistanceParameter = _effect.Parameters["NearBlurDistance"];
_nearFocusDistanceParameter = _effect.Parameters["NearFocusDistance"];
_farFocusDistanceParameter = _effect.Parameters["FarFocusDistance"];
_farBlurDistanceParameter = _effect.Parameters["FarBlurDistance"];
_farParameter = _effect.Parameters["Far"];
_blurTextureParameter = _effect.Parameters["BlurTexture"];
_downsampledDepthTextureParameter = _effect.Parameters["DownsampledDepthTexture"];
_downsampledCocTextureParameter = _effect.Parameters["DownsampledCocTexture"];
_offsetsParameter = _effect.Parameters["Offsets"];
_weightsParameter = _effect.Parameters["Weights"];
_sceneTextureParameter = _effect.Parameters["SceneTexture"];
_circleOfConfusionPass = _effect.CurrentTechnique.Passes["CircleOfConfusion"];
_blurPass = _effect.CurrentTechnique.Passes["Blur"];
_depthOfFieldPass = _effect.CurrentTechnique.Passes["DepthOfField"];
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
_cocBlur = new Blur(graphicsService);
_cocBlur.InitializeBoxBlur(5, false);
NearBlurDistance = 2;
NearFocusDistance = 5;
FarFocusDistance = 6;
FarBlurDistance = 10;
_downsampleFactor = 2;
BlurStrength = 1;
}
public GBufferRenderer(IGraphicsService graphicsService, SceneNodeRenderer sceneNodeRenderer, DecalRenderer decalRenderer)
{
_clearGBufferRenderer = new ClearGBufferRenderer(graphicsService);
_sceneNodeRenderer = sceneNodeRenderer;
_decalRenderer = decalRenderer;
// This filter is used to downsample the depth buffer (GBuffer0).
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
}
public DownsampleSample(Microsoft.Xna.Framework.Game game)
: base(game)
{
// Create a DownsampleFilter which downsamples the current screen to a 64x64 pixel buffer.
_downsampleFilter = new DownsampleFilter(GraphicsService)
{
// The PostProcessorChain reads the DefaultTargetFormat property. Here,
// we can define the downsampled resolution.
DefaultTargetFormat = new RenderTargetFormat(64, 64, false, SurfaceFormat.Color, DepthFormat.None),
};
GraphicsScreen.PostProcessors.Add(_downsampleFilter);
// This CopyFilter copies the downsampled image to the back buffer.
_copyFilter = new CopyFilter(GraphicsService);
GraphicsScreen.PostProcessors.Add(_copyFilter);
}
//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="HdrFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public HdrFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load <Effect>("DigitalRune/PostProcessing/HdrFilter");
_viewportSizeParameter = _effect.Parameters["ViewportSize"];
_bloomThresholdParameter = _effect.Parameters["BloomThreshold"];
_middleGrayParameter = _effect.Parameters["MiddleGray"];
_minExposureParameter = _effect.Parameters["MinExposure"];
_maxExposureParameter = _effect.Parameters["MaxExposure"];
_blueShiftColorParameter = _effect.Parameters["BlueShiftColor"];
_blueShiftParameter = _effect.Parameters["BlueShift"];
_bloomIntensityParameter = _effect.Parameters["BloomIntensity"];
_sceneTextureParameter = _effect.Parameters["SceneTexture"];
_luminanceTextureParameter = _effect.Parameters["LuminanceTexture"];
_bloomTextureParameter = _effect.Parameters["BloomTexture"];
_brightnessPass = _effect.CurrentTechnique.Passes["Brightness"];
_combinePass = _effect.CurrentTechnique.Passes["Combine"];
_combineWithBlueShiftPass = _effect.CurrentTechnique.Passes["CombineWithBlueShift"];
BloomIntensity = 1;
BloomThreshold = 0.2f;
DownsampleFactor = 4;
MiddleGray = 0.18f;
MinExposure = 0.01f;
MaxExposure = 2.0f;
// The physically based blue shift color is in CIE Yxy: x = 0.3 and y = 0.3.
// As RGB this is (1.05, 0.97, 1.27). This color should be scaled by a user-defined
// scale. The scotopic luminance computed in the shader is usually in the range [0, 4].
// Therefore, we apply a scale factor of 0.25 as a default.
BlueShiftColor = new Vector3F(1.05f, 0.97f, 1.27f) * 0.25f;
BlueShiftCenter = 0.04f;
BlueShiftRange = 1;
_blur = new Blur(graphicsService);
_blur.InitializeGaussianBlur(7, 7.0f / 3.0f, true);
_luminance = new LuminanceFilter(graphicsService);
_luminanceTarget = graphicsService.RenderTargetPool.Obtain2D(_luminance.DefaultTargetFormat);
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
var defaultTargetFormat = DefaultTargetFormat;
defaultTargetFormat.SurfaceFormat = SurfaceFormat.Color;
DefaultTargetFormat = defaultTargetFormat;
}
public static DownsampleFilter GetDownsampleFilter(this IGraphicsService graphicsService)
{
if (graphicsService == null)
throw new ArgumentNullException("graphicsService");
const string Key = "__DownsampleFilter";
object obj;
graphicsService.Data.TryGetValue(Key, out obj);
var instance = obj as DownsampleFilter;
if (instance == null)
{
instance = new DownsampleFilter(graphicsService);
graphicsService.Data[Key] = instance;
}
return instance;
}
public static DownsampleFilter GetDownsampleFilter(this IGraphicsService graphicsService)
{
if (graphicsService == null)
{
throw new ArgumentNullException("graphicsService");
}
const string Key = "__DownsampleFilter";
object obj;
graphicsService.Data.TryGetValue(Key, out obj);
var instance = obj as DownsampleFilter;
if (instance == null)
{
instance = new DownsampleFilter(graphicsService);
graphicsService.Data[Key] = instance;
}
return(instance);
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="BloomFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public BloomFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load<Effect>("DigitalRune/PostProcessing/BloomFilter");
_viewportSizeParameter = _effect.Parameters["ViewportSize"];
_bloomThresholdParameter = _effect.Parameters["BloomThreshold"];
_bloomIntensityParameter = _effect.Parameters["BloomIntensity"];
_bloomSaturationParameter = _effect.Parameters["BloomSaturation"];
_sceneTextureParameter = _effect.Parameters["SceneTexture"];
_bloomTextureParameter = _effect.Parameters["BloomTexture"];
_brightnessPass = _effect.CurrentTechnique.Passes["Brightness"];
_combinePass = _effect.CurrentTechnique.Passes["Combine"];
_blur = new Blur(graphicsService);
_blur.InitializeGaussianBlur(7, 7.0f / 3.0f, true);
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
Threshold = 0.7f;
Intensity = 1.5f;
Saturation = 0.5f;
DownsampleFactor = 4;
}
//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="BloomFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public BloomFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load <Effect>("DigitalRune/PostProcessing/BloomFilter");
_viewportSizeParameter = _effect.Parameters["ViewportSize"];
_bloomThresholdParameter = _effect.Parameters["BloomThreshold"];
_bloomIntensityParameter = _effect.Parameters["BloomIntensity"];
_bloomSaturationParameter = _effect.Parameters["BloomSaturation"];
_sceneTextureParameter = _effect.Parameters["SceneTexture"];
_bloomTextureParameter = _effect.Parameters["BloomTexture"];
_brightnessPass = _effect.CurrentTechnique.Passes["Brightness"];
_combinePass = _effect.CurrentTechnique.Passes["Combine"];
_blur = new Blur(graphicsService);
_blur.InitializeGaussianBlur(7, 7.0f / 3.0f, true);
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
Threshold = 0.7f;
Intensity = 1.5f;
Saturation = 0.5f;
DownsampleFactor = 4;
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="SsaoFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public SsaoFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load<Effect>("DigitalRune/PostProcessing/SsaoFilter");
_farParameter = _effect.Parameters["Far"];
_radiusParameter = _effect.Parameters["Radius"];
_strengthParameter = _effect.Parameters["Strength"];
_maxDistancesParameter = _effect.Parameters["MaxDistances"];
_viewportSizeParameter = _effect.Parameters["ViewportSize"];
_sourceTextureParameter = _effect.Parameters["SourceTexture"];
_gBuffer0Parameter = _effect.Parameters["GBuffer0"];
_occlusionTextureParameter = _effect.Parameters["OcclusionTexture"];
_createLinesAPass = _effect.CurrentTechnique.Passes["CreateLinesA"];
_createLinesBPass = _effect.CurrentTechnique.Passes["CreateLinesB"];
_blurHorizontalPass = _effect.CurrentTechnique.Passes["BlurHorizontal"];
_blurVerticalPass = _effect.CurrentTechnique.Passes["BlurVertical"];
_combinePass = _effect.CurrentTechnique.Passes["Combine"];
_copyPass = _effect.CurrentTechnique.Passes["Copy"];
Radii = new Vector2F(0.01f, 0.02f);
MaxDistances = new Vector2F(0.5f, 1.0f);
Strength = 1f;
NumberOfBlurPasses = 1;
DownsampleFactor = 2;
Quality = 2;
Scale = new Vector2F(0.5f, 2f);
CombineWithSource = true;
_blur = new Blur(graphicsService);
_blur.InitializeGaussianBlur(7, 7 / 3, true);
_copyFilter = PostProcessHelper.GetCopyFilter(graphicsService);
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
Random random = new Random(123456);
Vector3[] vectors = new Vector3[9];
// 16 random vectors for Crytek-style point samples.
//for (int i = 0; i < vectors.Length; i++)
// vectors[i] = (Vector3)random.NextQuaternionF().Rotate(Vector3F.One).Normalized;
// //* random.NextFloat(0.5f, 1) // Note: StarCraft 2 uses varying length to vary the sample offset length.
// We create rotated random vectors with uniform distribution in 360°. Each random vector
// is further rotated with small random angle.
float jitterAngle = ConstantsF.TwoPi / vectors.Length / 4;
for (int i = 0; i < vectors.Length; i++)
vectors[i] = (Vector3)(Matrix33F.CreateRotationZ(ConstantsF.TwoPi * i / vectors.Length + random.NextFloat(-jitterAngle, jitterAngle)) * new Vector3F(1, 0, 0)).Normalized;
// Permute randomVectors.
for (int i = 0; i < vectors.Length; i++)
MathHelper.Swap(ref vectors[i], ref vectors[random.Next(i, vectors.Length - 1)]);
// Scale random vectors.
for (int i = 0; i < vectors.Length; i++)
vectors[i].Z = random.NextFloat(Scale.X, Scale.Y);
_effect.Parameters["RandomVectors"].SetValue(vectors);
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="DepthOfFieldFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public DepthOfFieldFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load<Effect>("DigitalRune/PostProcessing/DepthOfFieldFilter");
_screenSizeParameter = _effect.Parameters["ScreenSize"];
_depthTextureParameter = _effect.Parameters["DepthTexture"];
_nearBlurDistanceParameter = _effect.Parameters["NearBlurDistance"];
_nearFocusDistanceParameter = _effect.Parameters["NearFocusDistance"];
_farFocusDistanceParameter = _effect.Parameters["FarFocusDistance"];
_farBlurDistanceParameter = _effect.Parameters["FarBlurDistance"];
_farParameter = _effect.Parameters["Far"];
_blurTextureParameter = _effect.Parameters["BlurTexture"];
_downsampledDepthTextureParameter = _effect.Parameters["DownsampledDepthTexture"];
_downsampledCocTextureParameter = _effect.Parameters["DownsampledCocTexture"];
_offsetsParameter = _effect.Parameters["Offsets"];
_weightsParameter = _effect.Parameters["Weights"];
_sceneTextureParameter = _effect.Parameters["SceneTexture"];
_circleOfConfusionPass = _effect.CurrentTechnique.Passes["CircleOfConfusion"];
_blurPass = _effect.CurrentTechnique.Passes["Blur"];
_depthOfFieldPass = _effect.CurrentTechnique.Passes["DepthOfField"];
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
_cocBlur = new Blur(graphicsService);
_cocBlur.InitializeBoxBlur(5, false);
NearBlurDistance = 2;
NearFocusDistance = 5;
FarFocusDistance = 6;
FarBlurDistance = 10;
_downsampleFactor = 2;
BlurStrength = 1;
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="HdrFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public HdrFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load<Effect>("DigitalRune/PostProcessing/HdrFilter");
_viewportSizeParameter = _effect.Parameters["ViewportSize"];
_bloomThresholdParameter = _effect.Parameters["BloomThreshold"];
_middleGrayParameter = _effect.Parameters["MiddleGray"];
_minExposureParameter = _effect.Parameters["MinExposure"];
_maxExposureParameter = _effect.Parameters["MaxExposure"];
_blueShiftColorParameter = _effect.Parameters["BlueShiftColor"];
_blueShiftParameter = _effect.Parameters["BlueShift"];
_bloomIntensityParameter = _effect.Parameters["BloomIntensity"];
_sceneTextureParameter = _effect.Parameters["SceneTexture"];
_luminanceTextureParameter = _effect.Parameters["LuminanceTexture"];
_bloomTextureParameter = _effect.Parameters["BloomTexture"];
_brightnessPass = _effect.CurrentTechnique.Passes["Brightness"];
_combinePass = _effect.CurrentTechnique.Passes["Combine"];
_combineWithBlueShiftPass = _effect.CurrentTechnique.Passes["CombineWithBlueShift"];
BloomIntensity = 1;
BloomThreshold = 0.2f;
DownsampleFactor = 4;
MiddleGray = 0.18f;
MinExposure = 0.01f;
MaxExposure = 2.0f;
// The physically based blue shift color is in CIE Yxy: x = 0.3 and y = 0.3.
// As RGB this is (1.05, 0.97, 1.27). This color should be scaled by a user-defined
// scale. The scotopic luminance computed in the shader is usually in the range [0, 4].
// Therefore, we apply a scale factor of 0.25 as a default.
BlueShiftColor = new Vector3F(1.05f, 0.97f, 1.27f) * 0.25f;
BlueShiftCenter = 0.04f;
BlueShiftRange = 1;
_blur = new Blur(graphicsService);
_blur.InitializeGaussianBlur(7, 7.0f / 3.0f, true);
_luminance = new LuminanceFilter(graphicsService);
_luminanceTarget = graphicsService.RenderTargetPool.Obtain2D(_luminance.DefaultTargetFormat);
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
var defaultTargetFormat = DefaultTargetFormat;
defaultTargetFormat.SurfaceFormat = SurfaceFormat.Color;
DefaultTargetFormat = defaultTargetFormat;
}
//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="SsaoFilter"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public SsaoFilter(IGraphicsService graphicsService)
: base(graphicsService)
{
_effect = GraphicsService.Content.Load <Effect>("DigitalRune/PostProcessing/SsaoFilter");
_farParameter = _effect.Parameters["Far"];
_radiusParameter = _effect.Parameters["Radius"];
_strengthParameter = _effect.Parameters["Strength"];
_maxDistancesParameter = _effect.Parameters["MaxDistances"];
_viewportSizeParameter = _effect.Parameters["ViewportSize"];
_sourceTextureParameter = _effect.Parameters["SourceTexture"];
_gBuffer0Parameter = _effect.Parameters["GBuffer0"];
_occlusionTextureParameter = _effect.Parameters["OcclusionTexture"];
_createLinesAPass = _effect.CurrentTechnique.Passes["CreateLinesA"];
_createLinesBPass = _effect.CurrentTechnique.Passes["CreateLinesB"];
_blurHorizontalPass = _effect.CurrentTechnique.Passes["BlurHorizontal"];
_blurVerticalPass = _effect.CurrentTechnique.Passes["BlurVertical"];
_combinePass = _effect.CurrentTechnique.Passes["Combine"];
_copyPass = _effect.CurrentTechnique.Passes["Copy"];
Radii = new Vector2F(0.01f, 0.02f);
MaxDistances = new Vector2F(0.5f, 1.0f);
Strength = 1f;
NumberOfBlurPasses = 1;
DownsampleFactor = 2;
Quality = 2;
Scale = new Vector2F(0.5f, 2f);
CombineWithSource = true;
_blur = new Blur(graphicsService);
_blur.InitializeGaussianBlur(7, 7 / 3, true);
_copyFilter = PostProcessHelper.GetCopyFilter(graphicsService);
_downsampleFilter = PostProcessHelper.GetDownsampleFilter(graphicsService);
Random random = new Random(123456);
Vector3[] vectors = new Vector3[9];
// 16 random vectors for Crytek-style point samples.
//for (int i = 0; i < vectors.Length; i++)
// vectors[i] = (Vector3)random.NextQuaternionF().Rotate(Vector3F.One).Normalized;
// //* random.NextFloat(0.5f, 1) // Note: StarCraft 2 uses varying length to vary the sample offset length.
// We create rotated random vectors with uniform distribution in 360°. Each random vector
// is further rotated with small random angle.
float jitterAngle = ConstantsF.TwoPi / vectors.Length / 4;
for (int i = 0; i < vectors.Length; i++)
{
vectors[i] = (Vector3)(Matrix33F.CreateRotationZ(ConstantsF.TwoPi * i / vectors.Length + random.NextFloat(-jitterAngle, jitterAngle)) * new Vector3F(1, 0, 0)).Normalized;
}
// Permute randomVectors.
for (int i = 0; i < vectors.Length; i++)
{
MathHelper.Swap(ref vectors[i], ref vectors[random.Next(i, vectors.Length - 1)]);
}
// Scale random vectors.
for (int i = 0; i < vectors.Length; i++)
{
vectors[i].Z = random.NextFloat(Scale.X, Scale.Y);
}
_effect.Parameters["RandomVectors"].SetValue(vectors);
}