/// <summary>
/// Hacer blur de bright-pass para generar efecto de bloom
/// </summary>
/// <param name="d3dDevice"></param>
private void bloomPass(Device d3dDevice)
{
d3dDevice.BeginScene();
//Gaussian blur horizontal
Vector2[] texCoordOffsets;
float[] colorWeights;
Surface bloomTempS = bloomTempRT.GetSurfaceLevel(0);
TgcPostProcessingUtils.computeGaussianBlurSampleOffsets15(bloomTempS.Description.Width, 1, 1, true, out texCoordOffsets, out colorWeights);
effect.Technique = "BloomPass";
effect.SetValue("texBloomRT", brightPassRT);
d3dDevice.SetRenderTarget(0, bloomTempS);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
//Gaussian blur vertical
TgcPostProcessingUtils.computeGaussianBlurSampleOffsets15(bloomTempS.Description.Height, 1, 1, false, out texCoordOffsets, out colorWeights);
effect.Technique = "BloomPass";
effect.SetValue("texBloomRT", bloomTempRT);
effect.SetValue("gauss_offsets", TgcParserUtils.vector2ArrayToFloat2Array(texCoordOffsets));
effect.SetValue("gauss_weights", colorWeights);
Surface bloomS = bloomRT.GetSurfaceLevel(0);
d3dDevice.SetRenderTarget(0, bloomS);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
bloomTempS.Dispose();
bloomS.Dispose();
d3dDevice.EndScene();
}
/// <summary>
/// Se toma todo lo dibujado antes, que se guardo en una textura, y se le aplica un shader para borronear la imagen
/// </summary>
private void drawPostProcess(Device d3dDevice)
{
//Arrancamos la escena
d3dDevice.BeginScene();
//Ver si el efecto de oscurecer esta activado, configurar Technique del shader segun corresponda
bool activar_efecto = (bool)GuiController.Instance.Modifiers["activar_efecto"];
//Hacer blur
if (activar_efecto)
{
float deviation = (float)GuiController.Instance.Modifiers["deviation"];
Surface blurTempS = blurTempRT.GetSurfaceLevel(0);
//Gaussian blur horizontal
Vector2[] texCoordOffsets;
float[] colorWeights;
TgcPostProcessingUtils.computeGaussianBlurSampleOffsets15(blurTempS.Description.Width, deviation, 1, true, out texCoordOffsets, out colorWeights);
effect.Technique = "GaussianBlurPass";
effect.SetValue("texSceneRT", sceneRT);
effect.SetValue("gauss_offsets", TgcParserUtils.vector2ArrayToFloat2Array(texCoordOffsets));
effect.SetValue("gauss_weights", colorWeights);
d3dDevice.SetRenderTarget(0, blurTempS);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
//Gaussian blur vertical
TgcPostProcessingUtils.computeGaussianBlurSampleOffsets15(blurTempS.Description.Height, deviation, 1, false, out texCoordOffsets, out colorWeights);
effect.Technique = "GaussianBlurPass";
effect.SetValue("texSceneRT", blurTempRT);
effect.SetValue("gauss_offsets", TgcParserUtils.vector2ArrayToFloat2Array(texCoordOffsets));
effect.SetValue("gauss_weights", colorWeights);
d3dDevice.SetRenderTarget(0, pOldRT);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
blurTempS.Dispose();
}
//No hacer blur
else
{
effect.Technique = "DefaultTechnique";
effect.SetValue("texSceneRT", sceneRT);
d3dDevice.SetRenderTarget(0, pOldRT);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
}
//Como estamos en modo CustomRenderEnabled, tenemos que dibujar todo nosotros, incluso el contador de FPS
GuiController.Instance.Text3d.drawText("FPS: " + HighResolutionTimer.Instance.FramesPerSecond, 0, 0, Color.Yellow);
//Tambien hay que dibujar el indicador de los ejes cartesianos
GuiController.Instance.AxisLines.render();
//Terminamos el renderizado de la escena
d3dDevice.EndScene();
}
/// <summary>
/// Se toma todo lo dibujado antes, que se guardo en una textura, y se le aplica un shader para borronear la imagen
/// </summary>
private void drawPostProcess(Device d3dDevice)
{
//Arrancamos la escena
d3dDevice.BeginScene();
//Ver si el efecto de oscurecer esta activado, configurar Technique del shader segun corresponda
var activar_efecto = (bool)Modifiers["activar_efecto"];
//Hacer blur
if (activar_efecto)
{
var deviation = (float)Modifiers["deviation"];
var blurTempS = blurTempRT.GetSurfaceLevel(0);
//Gaussian blur horizontal
Vector2[] texCoordOffsets;
float[] colorWeights;
TgcPostProcessingUtils.computeGaussianBlurSampleOffsets15(blurTempS.Description.Width, deviation, 1,
true, out texCoordOffsets, out colorWeights);
effect.Technique = "GaussianBlurPass";
effect.SetValue("texSceneRT", sceneRT);
effect.SetValue("gauss_offsets", TgcParserUtils.vector2ArrayToFloat2Array(texCoordOffsets));
effect.SetValue("gauss_weights", colorWeights);
d3dDevice.SetRenderTarget(0, blurTempS);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
//Gaussian blur vertical
TgcPostProcessingUtils.computeGaussianBlurSampleOffsets15(blurTempS.Description.Height, deviation, 1,
false, out texCoordOffsets, out colorWeights);
effect.Technique = "GaussianBlurPass";
effect.SetValue("texSceneRT", blurTempRT);
effect.SetValue("gauss_offsets", TgcParserUtils.vector2ArrayToFloat2Array(texCoordOffsets));
effect.SetValue("gauss_weights", colorWeights);
d3dDevice.SetRenderTarget(0, pOldRT);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
blurTempS.Dispose();
}
//No hacer blur
else
{
effect.Technique = "DefaultTechnique";
effect.SetValue("texSceneRT", sceneRT);
d3dDevice.SetRenderTarget(0, pOldRT);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
}
//Terminamos el renderizado de la escena
RenderFPS();
RenderAxis();
d3dDevice.EndScene();
d3dDevice.Present();
}
/// <summary>
/// Generar imagen reducida del RT de HDR original de la escena.
/// Lo reducimos a una textura de 1/4 x 1/4 de la original.
/// El shader lee 4x4 texels y los promedia
/// </summary>
private void scaleScene(Device d3dDevice)
{
d3dDevice.BeginScene();
var backBufferWidth = d3dDevice.PresentationParameters.BackBufferWidth;
var backBufferHeight = d3dDevice.PresentationParameters.BackBufferHeight;
var sampleOffsets = TgcPostProcessingUtils.computeDownScaleOffsets4x4(backBufferWidth, backBufferHeight);
effect.Technique = "DownScale4x4";
effect.SetValue("texSceneRT", sceneRT);
effect.SetValue("sampleOffsets", TgcParserUtils.vector2ArrayToFloat2Array(sampleOffsets));
var scaledSceneS = scaledSceneRT.GetSurfaceLevel(0);
d3dDevice.SetRenderTarget(0, scaledSceneS);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
d3dDevice.EndScene();
scaledSceneS.Dispose();
}
/// <summary>
/// Recorremos toda la imagen de scaledSceneRT y buscamos el pixel con el maximo nivel de luminosidad.
/// Lo hacemos en GPU, con varias pasadas de downsampling, hasta llegar a una textura de 1x1.
/// </summary>
private void findAverageLuminance(Device d3dDevice)
{
d3dDevice.BeginScene();
//Obtener surfaces de todos los luminanceRTs
Surface[] luminanceSurfaces = new Surface[luminanceRTs.Length];
for (int i = 0; i < luminanceRTs.Length; i++)
{
luminanceSurfaces[i] = luminanceRTs[i].GetSurfaceLevel(0);
}
int curTexture = luminanceRTs.Length - 1;
int surfWidth = luminanceSurfaces[curTexture].Description.Width;
int surfHeight = luminanceSurfaces[curTexture].Description.Height;
//Calcular los offsets de la primera pasada de downsampling de luminance
float tU, tV;
tU = 1.0f / (3.0f * surfWidth);
tV = 1.0f / (3.0f * surfHeight);
int x, y;
int index = 0;
Vector2[] sampleOffsets = new Vector2[16];
for (x = -1; x <= 1; x++)
{
for (y = -1; y <= 1; y++)
{
sampleOffsets[index] = new Vector2(x * tU, y * tV);
index++;
}
}
//Primera pasada de luminance: calculamos el promedio de log(luminance) de 4x4
effect.Technique = "SampleAvgLuminance_Init";
effect.SetValue("texSceneRT", scaledSceneRT);
effect.SetValue("sampleOffsets", TgcParserUtils.vector2ArrayToFloat2Array(sampleOffsets));
d3dDevice.SetRenderTarget(0, luminanceSurfaces[curTexture]);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
curTexture--;
//DEBUG
//TextureLoader.Save(GuiController.Instance.ExamplesMediaDir + "Shaders\\luminance_" + (curTexture+1) + ".bmp", ImageFileFormat.Bmp, luminanceRTs[curTexture + 1]);
//Hacer pasadas de downsampling intermedio
while (curTexture > 0)
{
//Calcular offsets de esta pasada de downsampling
surfWidth = luminanceSurfaces[curTexture].Description.Width;
surfHeight = luminanceSurfaces[curTexture].Description.Height;
sampleOffsets = TgcPostProcessingUtils.computeDownScaleOffsets4x4(surfWidth, surfHeight);
//Hacer downsampling
effect.Technique = "SampleAvgLuminance_Intermediate";
effect.SetValue("texSceneRT", luminanceRTs[curTexture + 1]);
effect.SetValue("sampleOffsets", TgcParserUtils.vector2ArrayToFloat2Array(sampleOffsets));
d3dDevice.SetRenderTarget(0, luminanceSurfaces[curTexture]);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
curTexture--;
//DEBUG
//TextureLoader.Save(GuiController.Instance.ExamplesMediaDir + "Shaders\\luminance_" + (curTexture+1) + ".bmp", ImageFileFormat.Bmp, luminanceRTs[curTexture + 1]);
}
//Hacer downsampling final de 1x1
surfWidth = luminanceSurfaces[1].Description.Width;
surfHeight = luminanceSurfaces[1].Description.Height;
sampleOffsets = TgcPostProcessingUtils.computeDownScaleOffsets4x4(surfWidth, surfHeight);
//Esta ultima pasada hace un promedio de 4x4 y luego hace exp para quitar el log y obtener el promedio de luminance de toda la escena
effect.Technique = "SampleAvgLuminance_End";
effect.SetValue("texSceneRT", luminanceRTs[1]);
effect.SetValue("sampleOffsets", TgcParserUtils.vector2ArrayToFloat2Array(sampleOffsets));
d3dDevice.SetRenderTarget(0, luminanceSurfaces[0]);
d3dDevice.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
screenQuad.render(effect);
//DEBUG
//TextureLoader.Save(GuiController.Instance.ExamplesMediaDir + "Shaders\\luminance_" + 0 + ".bmp", ImageFileFormat.Bmp, luminanceRTs[0]);
//Liberar todos los surfaces usados
for (int i = 0; i < luminanceSurfaces.Length; i++)
{
luminanceSurfaces[i].Dispose();
}
d3dDevice.EndScene();
}