private void Draw()
{
// render cube into offscreen render targets
var offScreenPassAction = default(PassAction);
offScreenPassAction.Color().Action = PassAttachmentAction.Clear;
offScreenPassAction.Color().Value = new Rgba32F(0.25f, 0.0f, 0.0f, 1.0f);
offScreenPassAction.Color(1).Action = PassAttachmentAction.Clear;
offScreenPassAction.Color(1).Value = new Rgba32F(0.0f, 0.25f, 0.0f, 1.0f);
offScreenPassAction.Color(2).Action = PassAttachmentAction.Clear;
offScreenPassAction.Color(2).Value = new Rgba32F(0.0f, 0.0f, 0.25f, 1.0f);
// describe the binding of the off screen cube
var offScreenBindings = default(ResourceBindings);
offScreenBindings.VertexBuffer() = _cubeVertexBuffer;
offScreenBindings.IndexBuffer = _cubeIndexBuffer;
_offScreenPass.Begin(ref offScreenPassAction);
_offScreenPass.ApplyPipeline(_offScreenPipeline);
_offScreenPass.ApplyBindings(ref offScreenBindings);
_offScreenPass.ApplyShaderUniforms(ShaderStageType.VertexStage, ref _modelViewProjectionMatrix);
_offScreenPass.DrawElements(36);
_offScreenPass.End();
// describe the binding of the debug quads
var debugBindings = default(ResourceBindings);
debugBindings.VertexBuffer() = _quadVertexBuffer;
// describe the binding of the full screen quad vertex buffer
var fullScreenBindings = default(ResourceBindings);
fullScreenBindings.VertexBuffer() = _quadVertexBuffer;
fullScreenBindings.FragmentStageImage() = _offScreenRenderTargets[0];
fullScreenBindings.FragmentStageImage(1) = _offScreenRenderTargets[1];
fullScreenBindings.FragmentStageImage(2) = _offScreenRenderTargets[2];
// render fullscreen quad with the 'composed image',
// plus 3 small debug-views with the content of the offscreen render targets
var pass = BeginDefaultPass();
pass.ApplyPipeline(_fullScreenPipeline);
pass.ApplyBindings(ref fullScreenBindings);
pass.ApplyShaderUniforms(ShaderStageType.VertexStage, ref _offset);
pass.DrawElements(4);
pass.ApplyPipeline(_debugPipeline);
for (var i = 0; i < 3; i++)
{
pass.ApplyViewport(i * 100, 0, 100, 100);
debugBindings.FragmentStageImage() = _offScreenRenderTargets[i];
pass.ApplyBindings(ref debugBindings);
pass.DrawElements(4);
}
pass.End();
}
private void Draw()
{
// begin the offscreen render pass
var offscreenPassAction = PassAction.Clear(Rgba32F.Black);
_offscreenRenderPass.Begin(ref offscreenPassAction);
// describe the bindings for rendering a non-textured cube into the render target
var offscreenResourceBindings = default(ResourceBindings);
offscreenResourceBindings.VertexBuffer() = _vertexBuffer;
offscreenResourceBindings.IndexBuffer = _indexBuffer;
// apply the render pipeline and bindings for the offscreen render pass
_offscreenRenderPass.ApplyPipeline(_offscreenPipeline);
_offscreenRenderPass.ApplyBindings(ref offscreenResourceBindings);
// apply the mvp matrix to the offscreen vertex shader
_offscreenRenderPass.ApplyShaderUniforms(ShaderStageType.VertexStage, ref _modelViewProjectionMatrix);
// draw the non-textured cube into the target of the offscreen render pass
_offscreenRenderPass.DrawElements(36);
// end the offscreen render pass
_offscreenRenderPass.End();
// begin a frame buffer render pass
Rgba32F clearColor = 0x0040FFFF;
var frameBufferPass = BeginDefaultPass(clearColor);
// describe the bindings for using the offscreen render target as the sampled texture
var frameBufferResourceBindings = default(ResourceBindings);
frameBufferResourceBindings.VertexBuffer() = _vertexBuffer;
frameBufferResourceBindings.IndexBuffer = _indexBuffer;
frameBufferResourceBindings.FragmentStageImage() = _renderTarget;
// apply the render pipeline and bindings for the frame buffer render pass
frameBufferPass.ApplyPipeline(_frameBufferPipeline);
frameBufferPass.ApplyBindings(ref frameBufferResourceBindings);
// apply the mvp matrix to the frame buffer vertex shader
frameBufferPass.ApplyShaderUniforms(ShaderStageType.VertexStage, ref _modelViewProjectionMatrix);
// draw the textured cube into the target of the frame buffer render pass
frameBufferPass.DrawElements(36);
// end the frame buffer render pass
frameBufferPass.End();
}