protected override void DrawCore(RenderContext contextParameters)
{
var input = GetInput(0);
var output = GetOutput(0) ?? input;
if (input == null)
{
return;
}
// Downscale to 1/2
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");
// Work on a blurred bright map
var blurredBright = NewScopedRenderTarget2D(halfSizeRenderTarget.Description);
blur.Radius = 8;
blur.SetInput(halfSizeRenderTarget);
blur.SetOutput(blurredBright);
blur.Draw(contextParameters);
// Draws a few artifacts
var flareRenderTargetInitial = NewScopedRenderTarget2D(halfSizeRenderTarget.Description);
var flareRenderTarget = NewScopedRenderTarget2D(halfSizeRenderTarget.Description);
flareArtifactEffect.Parameters.Set(FlareArtifactKeys.Count, ZoomOffsetsDistortions.Length);
flareArtifactEffect.Parameters.Set(FlareArtifactShaderKeys.ZoomOffsetsDistortions, ZoomOffsetsDistortions);
flareArtifactEffect.Parameters.Set(FlareArtifactShaderKeys.AberrationStrength, ColorAberrationStrength);
flareArtifactEffect.Parameters.Set(FlareArtifactShaderKeys.ColorAberrations, ColorAberrations);
flareArtifactEffect.Parameters.Set(FlareArtifactShaderKeys.Amount, Amount * 0.0005f);
flareArtifactEffect.SetInput(0, blurredBright);
flareArtifactEffect.SetOutput(flareRenderTargetInitial);
flareArtifactEffect.Draw(contextParameters);
// Replicates the artifacts around
flareReplicateEffect.Parameters.Set(FlareReplicateKeys.Amount, Amount * 0.0005f);
flareReplicateEffect.Parameters.Set(FlareReplicateKeys.HaloFactor, Amount * 0.0005f * HaloFactor);
flareReplicateEffect.SetInput(0, flareRenderTargetInitial);
flareReplicateEffect.SetInput(1, blurredBright);
flareReplicateEffect.SetOutput(flareRenderTarget);
flareReplicateEffect.Draw(contextParameters);
// Adds the result to the scene
GraphicsDevice.SetBlendState(GraphicsDevice.BlendStates.Additive);
Scaler.SetInput(flareRenderTarget);
Scaler.SetOutput(output);
Scaler.Draw(contextParameters);
GraphicsDevice.SetBlendState(GraphicsDevice.BlendStates.Default);
}
protected override void DrawCore(RenderContext context)
{
var input = GetSafeInput(0);
var output = GetSafeOutput(0);
// Render the luminance to a power-of-two target, so we preserve energy on downscaling
var startWidth = Math.Max(1, Math.Min(MathUtil.NextPowerOfTwo(input.Size.Width), MathUtil.NextPowerOfTwo(input.Size.Height)) / 2);
var startSize = new Size3(startWidth, startWidth, 1);
var blurTextureSize = startSize.Down2(UpscaleCount);
Texture outputTextureDown = null;
if (blurTextureSize.Width != 1 && blurTextureSize.Height != 1)
{
outputTextureDown = NewScopedRenderTarget2D(blurTextureSize.Width, blurTextureSize.Height, luminanceFormat, 1);
}
var luminanceMap = NewScopedRenderTarget2D(startSize.Width, startSize.Height, luminanceFormat, 1);
// Calculate the first luminance map
luminanceLogEffect.SetInput(input);
luminanceLogEffect.SetOutput(luminanceMap);
luminanceLogEffect.Draw(context);
// Downscales luminance up to BlurTexture (optional) and 1x1
multiScaler.SetInput(luminanceMap);
if (outputTextureDown == null)
{
multiScaler.SetOutput(luminance1x1);
}
else
{
multiScaler.SetOutput(outputTextureDown, luminance1x1);
}
multiScaler.Draw();
// If we have an output texture
if (outputTextureDown != null)
{
// Blur x2 the intermediate output texture
blur.SetInput(outputTextureDown);
blur.SetOutput(outputTextureDown);
blur.Draw(context);
blur.Draw(context);
// Upscale from intermediate to output
multiScaler.SetInput(outputTextureDown);
multiScaler.SetOutput(output);
multiScaler.Draw(context);
}
else
{
// TODO: Workaround to that the output filled with 1x1
Scaler.SetInput(luminance1x1);
Scaler.SetOutput(output);
Scaler.Draw(context);
}
// Calculate average luminance only if needed
if (EnableAverageLuminanceReadback)
{
readback.SetInput(luminance1x1);
readback.Draw();
var rawLogValue = readback.Result[0];
AverageLuminance = (float)Math.Pow(2.0, rawLogValue);
// In case AvergaeLuminance go crazy because of halp float/infinity precision, some code to save the values here:
//if (float.IsInfinity(AverageLuminance))
//{
// using (var stream = new FileStream("luminance_input.dds", FileMode.Create, FileAccess.Write))
// {
// input.Save(stream, ImageFileType.Dds);
// }
// using (var stream = new FileStream("luminance.dds", FileMode.Create, FileAccess.Write))
// {
// luminanceMap.Save(stream, ImageFileType.Dds);
// }
//}
}
}
protected override void DrawCore(RenderContext 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, 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)
{
GraphicsDevice.SetBlendState(GraphicsDevice.BlendStates.Additive);
}
combiner.SetInput(0, currentOutput);
combiner.Factors[0] = (1f / StreakCount) * 0.2f * Amount;
combiner.SetOutput(accumulationBuffer);
combiner.Draw(contextParameters);
GraphicsDevice.SetBlendState(GraphicsDevice.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);
Scaler.Draw(contextParameters);
blur.Radius = 3;
blur.SetInput(accumulationUpscaled);
blur.SetOutput(accumulationUpscaled);
blur.Draw(contextParameters);
// Adds the result to the original color buffer.
GraphicsDevice.SetBlendState(GraphicsDevice.BlendStates.Additive);
Scaler.SetInput(accumulationUpscaled);
Scaler.SetOutput(output);
Scaler.Draw(contextParameters);
GraphicsDevice.SetBlendState(GraphicsDevice.BlendStates.Default);
}
protected override void DrawCore(RenderContext context)
{
var input = GetInput(0);
var output = GetOutput(0) ?? input;
if (input == null)
{
return;
}
// If afterimage is active, add some persistence to the brightness
if (afterimage.Enabled)
{
var persistenceBrightness = NewScopedRenderTarget2D(input.Description);
afterimage.SetInput(0, input);
afterimage.SetOutput(persistenceBrightness);
afterimage.Draw(context);
input = persistenceBrightness;
}
// A distortion can be applied to the bloom effect to simulate anamorphic lenses
if (Distortion.X > 1f || Distortion.Y > 1f)
{
int distortedWidth = (int)Math.Max(1, input.Description.Width / Distortion.X);
int distortedHeight = (int)Math.Max(1, input.Description.Height / Distortion.Y);
var anamorphicInput = NewScopedRenderTarget2D(distortedWidth, distortedHeight, input.Format);
Scaler.SetInput(input);
Scaler.SetOutput(anamorphicInput);
Scaler.Draw(context, "Anamorphic distortion");
input = anamorphicInput;
}
// ----------------------------------------
// Downscale / 4
// ----------------------------------------
const int DownScaleBasis = 1;
var nextSize = input.Size.Down2(DownScaleBasis);
var inputTextureDown4 = NewScopedRenderTarget2D(nextSize.Width, nextSize.Height, input.Format);
Scaler.SetInput(input);
Scaler.SetOutput(inputTextureDown4);
Scaler.Draw(context, "Down/4");
var blurTexture = inputTextureDown4;
// TODO: Support automatic additional downscales based on a quality parameter instead
// Additional downscales
if (DownScale > 0)
{
nextSize = nextSize.Down2(DownScale);
blurTexture = NewScopedRenderTarget2D(nextSize.Width, nextSize.Height, input.Format);
multiScaler.SetInput(inputTextureDown4);
multiScaler.SetOutput(blurTexture);
multiScaler.Draw(context);
}
// Max blur size no more than 1/4 of input size
var inputMaxBlurRadiusInPixels = 0.25 * Math.Max(input.Width, input.Height) * Math.Pow(2, -DownScaleBasis - DownScale);
blur.Radius = Math.Max(1, (int)MathUtil.Lerp(1, inputMaxBlurRadiusInPixels, Math.Max(0, Radius / 100.0f)));
blur.SigmaRatio = Math.Max(1.0f, SigmaRatio);
blur.SetInput(blurTexture);
blur.SetOutput(blurTexture);
blur.Draw(context);
// TODO: Support automatic additional downscales
if (DownScale > 0)
{
multiScaler.SetInput(blurTexture);
multiScaler.SetOutput(inputTextureDown4);
multiScaler.Draw(context);
}
// Copy the input texture to the output
if (ShowOnlyMip || ShowOnlyBloom)
{
GraphicsDevice.Clear(output, Color.Black);
}
// Switch to additive
GraphicsDevice.SetBlendState(GraphicsDevice.BlendStates.Additive);
Scaler.Color = new Color4(Amount);
Scaler.SetInput(inputTextureDown4);
Scaler.SetOutput(output);
Scaler.Draw(context);
Scaler.Reset();
GraphicsDevice.SetBlendState(GraphicsDevice.BlendStates.Default);
}