public void Begin(IEffect effect = null)
{
ThrowIfNotEnded();
if (effect != null)
{
_program = effect.Programs.First();
}
else
{
_program = _defaultEffect.Programs.First();
}
_program.Apply();
_gpu.PrepareRender();
_isRendering = true;
}
public void Process(RenderTarget2D renderTarget)
{
// First step in all this is submitting our quad to the GPU.
_gpu.SubmitVertices(_verts);
_gpu.SubmitIndices(_indices);
var rect = renderTarget.Bounds;
if (EnableBloom && Settings.EnableBloom)
{
PerformBloom(renderTarget, rect);
}
else
{
NoEffect(renderTarget, rect);
}
if (Settings.EnableGlitch && _glitchIntensity > 0)
{
// update glitch settings.
// _glitch.Parameters["Intensity"].SetValue(_glitchIntensity);
// _glitch.Parameters["TextureSize"].SetValue(rect.Size.ToVector2());
// _glitch.Parameters["Skew"].SetValue(_glitchSkew);
// copy intermediate to effect buffer 1.
// using the glitch effect.
// _gfx.SetRenderTarget(_effectBuffer1);
// _batch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend, SamplerState.LinearWrap);
// _glitch.CurrentTechnique.Passes[0].Apply();
// _batch.Draw(_intermediate, rect, Color.White);
// _batch.End();
// render effect buffer 1 to intermediate
// _gfx.SetRenderTarget(_intermediate);
// _batch.Begin();
// _batch.Draw(_effectBuffer1, rect, Color.White);
// _batch.End();
}
if (EnableShadowMask && Settings.EnableShadowMask)
{
SetShadowMaskParams();
// copy the intermediate RT to effect buffer 1
// with the shadowmask effect applied
_gpu.SetRenderTarget(_effectBuffer1);
// apply the shadowmask.
_shadowmask.Apply();
// clear the effect buffer
_gpu.Clear(Color.Black);
// Bind the texture and prepare for a render
_gpu.Textures[0] = _intermediate;
_gpu.PrepareRender();
// Render
_gpu.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
// End the render and bind the effect buffer after we switch to the immediate RT
_gpu.EndRender();
_gpu.SetRenderTarget(null);
_gpu.Textures[0] = _effectBuffer1;
_gpu.SetRenderTarget(_intermediate);
// Apply the default effect.
_basicEffect.Programs.First().Apply();
// Start a render
_gpu.PrepareRender();
// Render
_gpu.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
// End.
_gpu.EndRender();
_gpu.Textures[0] = null;
_gpu.SetRenderTarget(null);
}
// Render the intermediate buffer to the screen.
_basicEffect.Programs.First().Apply();
_gpu.SetRenderTarget(null);
// Get the GPU ready for some rendering :P
_gpu.PrepareRender();
_gpu.Textures[0] = _intermediate;
_gpu.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
_gpu.EndRender();
_gpu.Textures[0] = null;
}
private void PerformBloom(RenderTarget2D frame, Rectangle rect)
{
var hWidth = (float)rect.Width;
var hHeight = (float)rect.Height;
// change to the first effect buffer.
_gpu.SetRenderTarget(_effectBuffer1);
_gpu.Clear(Color.Black);
// Apply the bloom threshold program.
_brightnessThreshold.Parameters["threshold"].SetValue(_bloomThreshold);
_brightnessThreshold.Apply();
// Prepare for a render.
_gpu.PrepareRender();
_gpu.Textures[1] = frame;
// Render the quad.
_gpu.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
// End the render.
_gpu.EndRender();
_gpu.Textures[1] = null;
// Now we switch to Effect Buffer 2 so we can render the first blur pass.
_gpu.SetRenderTarget(_effectBuffer2);
_gpu.Clear(Color.Black);
SetBlurOffsets(1.0f / hWidth, 0f);
// Apply the blur shader.
_gaussian.Apply();
// Prepare for a render.
_gpu.PrepareRender();
_gpu.Textures[0] = _effectBuffer1;
// Draw the quad.
_gpu.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
// End the render.
_gpu.EndRender();
_gpu.Textures[0] = null;
// Switch to Effect Buffer 1 again and render the first blur pass with
// an additional blur pass.
_gpu.SetRenderTarget(_effectBuffer1);
_gpu.Clear(Color.Black);
SetBlurOffsets(0f, 1f / hHeight);
// Start the render after setting Effect Buffer 2 as the texture to render.
_gpu.Textures[0] = _effectBuffer2;
_gpu.PrepareRender();
// Draw the quad.
_gpu.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
// End the render.
_gpu.EndRender();
_gpu.Textures[0] = null;
_gpu.SetRenderTarget(null);
// Now for the actual bloom effect.
_gpu.SetRenderTarget(_effectBuffer2);
_gpu.Clear(Color.Black);
_gpu.Textures[0] = frame;
_gpu.Textures[1] = _effectBuffer1;
_bloom.Parameters["baseIntensity"].SetValue(_baseIntensity);
_bloom.Parameters["baseSaturation"].SetValue(_baseSaturation);
_bloom.Parameters["bloomIntensity"].SetValue(_bloomIntensity);
_bloom.Parameters["bloomSaturation"].SetValue(_bloomSaturation);
_bloom.Apply();
_gpu.PrepareRender();
_gpu.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
_gpu.EndRender();
_gpu.Textures[0] = null;
_gpu.Textures[1] = null;
// Render to our intermediate buffer.
_gpu.SetRenderTarget(_intermediate);
_gpu.Clear(Color.Black);
_basicEffect.Programs.First().Apply();
_gpu.PrepareRender(BlendMode.Additive);
_gpu.Textures[0] = _effectBuffer2;
_gpu.DrawPrimitives(PrimitiveType.TriangleList, 0, 2);
_gpu.EndRender();
_gpu.Textures[0] = null;
_gpu.SetRenderTarget(null);
}
