public Texture Render(Texture fromTexture, bool final = false)
{
if (!final)
{
fbo.Enable();
}
Graphics.TheGLTracking.SetShader(shader);
fromTexture.Enable();
shader.UniformMatrix("projection", matrix);
shader.Uniformi("texture", 0);
GL.Clear(ClearBufferMask.ColorBufferBit);
bb.Draw();
if (!final)
{
fbo.Disable();
}
return(DestTexture);
}
/// <summary>
/// Takes a function that draws the scene, and draws everything with the postprocessing pipeline.
/// </summary>
/// <param name="thunk">Thunk.</param>
public void RenderWith(Action drawScene)
{
// Render initial scene to FBO
fbo.Enable();
GL.ClearColor(Color4.Black);
GL.Clear(ClearBufferMask.ColorBufferBit);
drawScene();
fbo.Disable();
var fromTexture = fboTexture;
// Then we take the drawn scene and run it through each of the postprocessing steps.
for (int i = 0; i < steps.Count - 1; i++)
{
var step = steps[i];
var resultTexture = step.Render(fromTexture, final: false);
fromTexture = resultTexture;
}
// Then do the final rendering to the screen.
steps[steps.Count - 1].Render(fromTexture, final: true);
}
public Texture Render(Texture fromTexture, bool final = false)
{
const int convolutionRadius = 5;
int texels = 512;
// Do the first step of the separable convolution
fbo1.Enable();
fromTexture.Enable();
Graphics.TheGLTracking.SetShader(hGlowShader);
hGlowShader.UniformMatrix("projection", matrix);
hGlowShader.Uniformi("texels", texels);
hGlowShader.Uniformi("convolutionRadius", convolutionRadius);
hGlowShader.Uniformi("texture", 0);
GL.Clear(ClearBufferMask.ColorBufferBit);
bb1.Draw();
fbo1.Disable();
// Do the second step of the separable convolution
fbo2.Enable();
Graphics.TheGLTracking.SetShader(vGlowShader);
DestTexture1.Enable();
vGlowShader.UniformMatrix("projection", matrix);
vGlowShader.Uniformi("texels", texels);
vGlowShader.Uniformi("convolutionRadius", convolutionRadius);
vGlowShader.Uniformi("texture", 0);
GL.Clear(ClearBufferMask.ColorBufferBit);
bb2.Draw();
fbo2.Disable();
// Combine the blurred texture with the original texture again
if (!final)
{
fbo1.Enable();
}
// Shady-ass multi-texturing
var textures = new Texture[] {
fromTexture,
DestTexture2
};
Texture.EnableMultiple(textures);
Graphics.TheGLTracking.SetShader(combineShader);
combineShader.UniformMatrix("projection", matrix);
combineShader.Uniformi("texture", 0);
combineShader.Uniformi("glowTexture", 1);
GL.Clear(ClearBufferMask.ColorBufferBit);
bb3.Draw();
//DestTexture2.Enable();
//bb2.Draw();
Texture.DisableMultiple(textures);
if (!final)
{
fbo1.Disable();
}
return(DestTexture1);
}
