protected Pipeline(ref GraphicsPipelineDescription graphicsDescription)
: this(graphicsDescription.ResourceLayouts)
{
#if VALIDATE_USAGE
GraphicsOutputDescription = graphicsDescription.Outputs;
#endif
}
public void CreateDeviceResources(GraphicsDevice gd, OutputDescription outputDescription, ColorSpaceHandling colorSpaceHandling)
{
_gd = gd;
_colorSpaceHandling = colorSpaceHandling;
ResourceFactory factory = gd.ResourceFactory;
_vertexBuffer = factory.CreateBuffer(new BufferDescription(10000, BufferUsage.VertexBuffer | BufferUsage.Dynamic));
_vertexBuffer.Name = "ImGui.NET Vertex Buffer";
_indexBuffer = factory.CreateBuffer(new BufferDescription(2000, BufferUsage.IndexBuffer | BufferUsage.Dynamic));
_indexBuffer.Name = "ImGui.NET Index Buffer";
RecreateFontDeviceTexture(gd);
_projMatrixBuffer = factory.CreateBuffer(new BufferDescription(64, BufferUsage.UniformBuffer | BufferUsage.Dynamic));
_projMatrixBuffer.Name = "ImGui.NET Projection Buffer";
byte[] vertexShaderBytes = LoadEmbeddedShaderCode(gd.ResourceFactory, "imgui-vertex", ShaderStages.Vertex, _colorSpaceHandling);
byte[] fragmentShaderBytes = LoadEmbeddedShaderCode(gd.ResourceFactory, "imgui-frag", ShaderStages.Fragment, _colorSpaceHandling);
_vertexShader = factory.CreateShader(new ShaderDescription(ShaderStages.Vertex, vertexShaderBytes, "VS"));
_fragmentShader = factory.CreateShader(new ShaderDescription(ShaderStages.Fragment, fragmentShaderBytes, "FS"));
VertexLayoutDescription[] vertexLayouts = new VertexLayoutDescription[]
{
new VertexLayoutDescription(
new VertexElementDescription("in_position", VertexElementSemantic.Position, VertexElementFormat.Float2),
new VertexElementDescription("in_texCoord", VertexElementSemantic.TextureCoordinate, VertexElementFormat.Float2),
new VertexElementDescription("in_color", VertexElementSemantic.Color, VertexElementFormat.Byte4_Norm))
};
_layout = factory.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("ProjectionMatrixBuffer", ResourceKind.UniformBuffer, ShaderStages.Vertex),
new ResourceLayoutElementDescription("MainSampler", ResourceKind.Sampler, ShaderStages.Fragment)));
_textureLayout = factory.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("MainTexture", ResourceKind.TextureReadOnly, ShaderStages.Fragment)));
GraphicsPipelineDescription pd = new GraphicsPipelineDescription(
BlendStateDescription.SingleAlphaBlend,
new DepthStencilStateDescription(false, false, ComparisonKind.Always),
new RasterizerStateDescription(FaceCullMode.None, PolygonFillMode.Solid, FrontFace.Clockwise, true, true),
PrimitiveTopology.TriangleList,
new ShaderSetDescription(
vertexLayouts,
new[] { _vertexShader, _fragmentShader },
new[]
{
new SpecializationConstant(0, gd.IsClipSpaceYInverted),
new SpecializationConstant(1, _colorSpaceHandling == ColorSpaceHandling.Legacy),
}),
new ResourceLayout[] { _layout, _textureLayout },
outputDescription,
ResourceBindingModel.Default);
_pipeline = factory.CreateGraphicsPipeline(ref pd);
_mainResourceSet = factory.CreateResourceSet(new ResourceSetDescription(_layout,
_projMatrixBuffer,
gd.PointSampler));
_fontTextureResourceSet = factory.CreateResourceSet(new ResourceSetDescription(_textureLayout, _fontTextureView));
}
/// <summary>
/// Creates a new <see cref="Pipeline"/> object.
/// </summary>
/// <param name="description">The desired properties of the created object.</param>
/// <returns>A new <see cref="Pipeline"/> which, when bound to a CommandList, is used to dispatch draw commands.</returns>
public Pipeline CreateGraphicsPipeline(ref GraphicsPipelineDescription description)
{
#if VALIDATE_USAGE
if (!description.RasterizerState.DepthClipEnabled && !Features.DepthClipDisable)
{
throw new VeldridException(
"RasterizerState.DepthClipEnabled must be true if GraphicsDeviceFeatures.DepthClipDisable is not supported.");
}
if (description.RasterizerState.FillMode == PolygonFillMode.Wireframe && !Features.FillModeWireframe)
{
throw new VeldridException(
"PolygonFillMode.Wireframe requires GraphicsDeviceFeatures.FillModeWireframe.");
}
if (!Features.IndependentBlend)
{
if (description.BlendState.AttachmentStates.Length > 0)
{
BlendAttachmentDescription attachmentState = description.BlendState.AttachmentStates[0];
for (int i = 1; i < description.BlendState.AttachmentStates.Length; i++)
{
if (!attachmentState.Equals(description.BlendState.AttachmentStates[i]))
{
throw new VeldridException(
$"If GraphcsDeviceFeatures.IndependentBlend is false, then all members of BlendState.AttachmentStates must be equal.");
}
}
}
}
foreach (VertexLayoutDescription layoutDesc in description.ShaderSet.VertexLayouts)
{
bool hasExplicitLayout = false;
uint minOffset = 0;
foreach (VertexElementDescription elementDesc in layoutDesc.Elements)
{
if (hasExplicitLayout && elementDesc.Offset == 0)
{
throw new VeldridException(
$"If any vertex element has an explicit offset, then all elements must have an explicit offset.");
}
if (elementDesc.Offset != 0 && elementDesc.Offset < minOffset)
{
throw new VeldridException(
$"Vertex element \"{elementDesc.Name}\" has an explicit offset which overlaps with the previous element.");
}
minOffset = elementDesc.Offset + FormatHelpers.GetSizeInBytes(elementDesc.Format);
hasExplicitLayout |= elementDesc.Offset != 0;
}
if (minOffset > layoutDesc.Stride)
{
throw new VeldridException(
$"The vertex layout's stride ({layoutDesc.Stride}) is less than the full size of the vertex ({minOffset})");
}
}
#endif
return(CreateGraphicsPipelineCore(ref description));
}
internal Pipeline(ref GraphicsPipelineDescription graphicsDescription)
{
#if VALIDATE_USAGE
GraphicsOutputDescription = graphicsDescription.Outputs;
#endif
}
/// <summary> /// Creates a new <see cref="Pipeline"/>. /// </summary> /// <param name="description">The desired properties of the created object.</param> /// <returns>A new <see cref="Pipeline"/>.</returns> public Pipeline CreateGraphicsPipeline(GraphicsPipelineDescription description) => CreateGraphicsPipeline(ref description);
protected abstract Pipeline CreateGraphicsPipelineCore(ref GraphicsPipelineDescription description);
