internal Renderer(RenderScene scene, Logger logger = null)
{
if (scene == null)
{
throw new ArgumentNullException(nameof(scene));
}
this.scene = scene;
this.specializationContainer = new SpecializationContainer(logger);
this.pushDataContainer = new PushDataContainer(
stages: ShaderStages.Vertex | ShaderStages.Fragment, logger);
this.logger = logger;
}
public Item(
int order,
bool depthClamp,
bool depthBias,
IInternalRenderObject renderObject,
SpecializationContainer specializationContainer,
PushDataContainer pushDataContainer,
ShaderProgram vertProg,
ShaderProgram fragProg,
Device logicalDevice,
string debugName = null)
{
this.order = order;
this.renderObject = renderObject;
this.specializationContainer = specializationContainer;
this.pushDataContainer = pushDataContainer;
this.depthClamp = depthClamp;
this.depthBias = depthBias;
this.debugName = debugName;
vertModule = vertProg.CreateModule(logicalDevice);
fragModule = fragProg.CreateModule(logicalDevice);
}
internal static Pipeline CreatePipeline(
Device logicalDevice,
RenderPass renderpass,
PipelineLayout layout,
ShaderModule vertModule,
ShaderModule fragModule,
SpecializationContainer specializationContainer,
bool depthClamp,
bool depthBias,
ReadOnlySpan <DeviceTexture> targets,
IInternalRenderObject renderObject)
{
if (logicalDevice == null)
{
throw new ArgumentNullException(nameof(logicalDevice));
}
if (renderpass == null)
{
throw new ArgumentNullException(nameof(renderpass));
}
var shaderStages = new []
{
new PipelineShaderStageCreateInfo(
stage: ShaderStages.Vertex, module: vertModule, name: "main",
specializationInfo: specializationContainer?.GetInfo()),
new PipelineShaderStageCreateInfo(
stage: ShaderStages.Fragment,
module: fragModule, name: "main",
specializationInfo: specializationContainer?.GetInfo())
};
var depthTest = new PipelineDepthStencilStateCreateInfo {
DepthTestEnable = true,
DepthWriteEnable = true,
DepthCompareOp = CompareOp.LessOrEqual,
DepthBoundsTestEnable = false,
StencilTestEnable = false
};
var rasterizer = new PipelineRasterizationStateCreateInfo(
depthClampEnable: depthClamp,
rasterizerDiscardEnable: false,
polygonMode: PolygonMode.Fill,
cullMode: CullModes.Back,
frontFace: renderObject.GetFrontFace(),
depthBiasEnable: depthBias,
depthBiasConstantFactor: .1f,
depthBiasSlopeFactor: 1.75f,
lineWidth: 1f
);
//Gather all the color targets and setup a blend-state for them
ResizeArray <PipelineColorBlendAttachmentState> blendAttachments =
new ResizeArray <PipelineColorBlendAttachmentState>();
for (int i = 0; i < targets.Length; i++)
{
if (!targets[i].DepthTexture)
{
blendAttachments.Add(new PipelineColorBlendAttachmentState(
colorWriteMask: ColorComponents.All, blendEnable: false));
}
}
var blending = new PipelineColorBlendStateCreateInfo(
attachments: blendAttachments.ToArray(),
logicOpEnable: false
);
var multisampleState = new PipelineMultisampleStateCreateInfo(
rasterizationSamples: SampleCounts.Count1,
sampleShadingEnable: false
);
//Pass the viewport and scissor-rect as dynamic so we are not tied to swapchain size
//the advantage is this is that we don't need to recreate the pipeline on swapchain
//resize
var dynamicState = new PipelineDynamicStateCreateInfo(
DynamicState.Viewport,
DynamicState.Scissor
);
return(logicalDevice.CreateGraphicsPipeline(new GraphicsPipelineCreateInfo(
layout: layout,
renderPass: renderpass,
subpass: 0,
stages: shaderStages,
inputAssemblyState: renderObject.GetInputAssemblyStateInfo(),
vertexInputState: renderObject.GetVertexInputState(),
rasterizationState: rasterizer,
tessellationState: null,
//Pass empty viewport and scissor-rect as we set them dynamically
viewportState: new PipelineViewportStateCreateInfo(new Viewport(), new Rect2D()),
multisampleState: multisampleState,
depthStencilState: depthTest,
colorBlendState: blending,
dynamicState: dynamicState,
flags: PipelineCreateFlags.None
)));
}