private void GLElement_GLRenderStarted(object sender, EventArgs e)
{
#region FBO start
if (UseFrameBuffer)
{
FBO.Activate();
FBO.FBOInitializeView(GLElement1.PerspectiveProjection, TransformOuter.Location.Z);
}
else
{
FBO.Deactivate();
}
#endregion
RenderToBuffer();
#region FBO finish
if (UseFrameBuffer)
{
FBO.Deactivate();
GLElement1.InitializeView();
GL.ClearColor(0, .3f, .5f, 1);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.LoadIdentity();
// Now bind the texture to use it
GL.ActiveTexture(TextureUnit.Texture0);
FBO.Bind();
GLHelpers.Color4(Colors.Black); // to prevent it from being transparent
// Tranform
TransformOuter.Apply();
// Render with shader
LightingShaderProgram.Texture1 = FBO.Texture;
LightingShaderProgram.Activate();
//GLHelpers.Plane(1.3, 1.3, 0); // put it on a plane
GLHelpers.Cube2D(1.7); // put it on a cube
// Do some cleanup
TransformOuter.Remove();
Texture2D.Disable2DTextures();
ShaderProgram.DisableShaders();
}
#endregion
}
void init()
{
//Shadow map renderpass
shadowPass = new RenderPass(dev, VkSampleCountFlags.SampleCount1);
shadowPass.AddAttachment(SHADOWMAP_FORMAT, VkImageLayout.DepthStencilReadOnlyOptimal, SHADOWMAP_NUM_SAMPLES);
shadowPass.ClearValues.Add(new VkClearValue {
depthStencil = new VkClearDepthStencilValue(1.0f, 0)
});
SubPass subpass0 = new SubPass();
subpass0.SetDepthReference(0);
shadowPass.AddSubpass(subpass0);
shadowPass.AddDependency(Vk.SubpassExternal, 0,
VkPipelineStageFlags.FragmentShader, VkPipelineStageFlags.EarlyFragmentTests,
VkAccessFlags.ShaderRead, VkAccessFlags.DepthStencilAttachmentWrite);
shadowPass.AddDependency(0, Vk.SubpassExternal,
VkPipelineStageFlags.LateFragmentTests, VkPipelineStageFlags.FragmentShader,
VkAccessFlags.DepthStencilAttachmentWrite, VkAccessFlags.ShaderRead);
descLayoutShadow = new DescriptorSetLayout(dev,
new VkDescriptorSetLayoutBinding(0, VkShaderStageFlags.Geometry, VkDescriptorType.UniformBuffer), //matrices
new VkDescriptorSetLayoutBinding(1, VkShaderStageFlags.Geometry, VkDescriptorType.UniformBuffer)); //lights
using (GraphicPipelineConfig cfg = GraphicPipelineConfig.CreateDefault(VkPrimitiveTopology.TriangleList)) {
cfg.rasterizationState.cullMode = VkCullModeFlags.Front;
cfg.rasterizationState.depthBiasEnable = true;
cfg.dynamicStates.Add(VkDynamicState.DepthBias);
cfg.RenderPass = shadowPass;
cfg.Layout = new PipelineLayout(dev, descLayoutShadow);
cfg.AddVertexBinding <PbrModelTexArray.Vertex> (0);
cfg.AddVertexAttributes(0, VkFormat.R32g32b32Sfloat);
cfg.AddVertexBinding <VkChess.InstanceData> (1, VkVertexInputRate.Instance);
cfg.vertexAttributes.Add(new VkVertexInputAttributeDescription(1, 1, VkFormat.R32g32b32a32Sfloat, 16));
cfg.vertexAttributes.Add(new VkVertexInputAttributeDescription(1, 2, VkFormat.R32g32b32a32Sfloat, 32));
cfg.vertexAttributes.Add(new VkVertexInputAttributeDescription(1, 3, VkFormat.R32g32b32a32Sfloat, 48));
cfg.vertexAttributes.Add(new VkVertexInputAttributeDescription(1, 4, VkFormat.R32g32b32a32Sfloat, 64));
cfg.AddShader(dev, VkShaderStageFlags.Vertex, "#vkChess.net.shadow.vert.spv");
cfg.AddShader(dev, VkShaderStageFlags.Geometry, "#vkChess.net.shadow.geom.spv");
shadowPipeline = new GraphicPipeline(cfg, "shadow");
}
//shadow map image
shadowMap = new Image(dev, SHADOWMAP_FORMAT, VkImageUsageFlags.DepthStencilAttachment | VkImageUsageFlags.Sampled, VkMemoryPropertyFlags.DeviceLocal, SHADOWMAP_SIZE, SHADOWMAP_SIZE,
VkImageType.Image2D, SHADOWMAP_NUM_SAMPLES, VkImageTiling.Optimal, 1, (uint)renderer.lights.Length);
shadowMap.CreateView(VkImageViewType.ImageView2DArray, VkImageAspectFlags.Depth, shadowMap.CreateInfo.arrayLayers);
shadowMap.CreateSampler(VkSamplerAddressMode.ClampToBorder);
shadowMap.Descriptor.imageLayout = VkImageLayout.DepthStencilReadOnlyOptimal;
fbShadowMap = new FrameBuffer(shadowPass, SHADOWMAP_SIZE, SHADOWMAP_SIZE, (uint)renderer.lights.Length);
fbShadowMap.attachments.Add(shadowMap);
fbShadowMap.Activate();
dsShadow = descriptorPool.Allocate(descLayoutShadow);
DescriptorSetWrites dsWrite = new DescriptorSetWrites(dsShadow, descLayoutShadow);
dsWrite.Write(dev, renderer.uboMatrices.Descriptor, renderer.uboLights.Descriptor);
shadowMap.SetName("shadowmap");
fbShadowMap.SetName("fbShadow");
}
