//--------------------------------------------------------------
#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;
}
//--------------------------------------------------------------
/// <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;
}