/// <summary>
/// Function to build up the render targets.
/// </summary>
/// <param name="width">The width of the render targets.</param>
/// <param name="height">The height of the render targets.</param>
/// <param name="format">The format of the buffer.</param>
private void BuildRenderTargets(int width, int height, BufferFormat format)
{
// For the lighting effect, we use a deferred rendering technique where we have 3 render targets for diffuse, specularity, and normal mapping.
// These targets are sub resources of the same texture resource (array indices).
// Diffuse.
_rtvInfo.Width = width;
_rtvInfo.Height = height;
_rtvInfo.Format = format;
_rtvInfo.ArrayCount = 2;
_gbufferTargets[0] = Graphics.TemporaryTargets.Rent(_rtvInfo, "Gorgon 2D GBuffer - Diffuse/Specular", false);
_gbufferTargets[0].Clear(GorgonColor.Black);
// Specular.
_gbufferTargets[1] = _gbufferTargets[0].Texture.GetRenderTargetView(arrayIndex: 1, arrayCount: 1);
_rtvInfo.Format = BufferFormat.R8G8B8A8_UNorm;
_rtvInfo.ArrayCount = 1;
// Normals.
// We'll clear it before the pass, the default color is insufficient.
_gbufferTargets[2] = Graphics.TemporaryTargets.Rent(_rtvInfo, "Gorgon 2D Buffer - Normals", false);
GorgonTexture2DView normalSrv = _gbufferTargets[2].GetShaderResourceView();
if ((_pixelLitShaderState.ShaderResources[1] != normalSrv) ||
(_diffuseFilter != DiffuseFiltering) ||
(_normalFilter != NormalFiltering) ||
(_specularFilter != SpecularFiltering))
{
_diffuseFilter = DiffuseFiltering ?? GorgonSamplerState.Default;
_normalFilter = NormalFiltering ?? GorgonSamplerState.PointFiltering;
_specularFilter = SpecularFiltering ?? GorgonSamplerState.Default;
_pixelDeferShaderState = PixelShaderBuilder.ResetTo(_pixelDeferShaderState)
.SamplerState(_diffuseFilter, 0)
.SamplerState(_normalFilter, 1)
.SamplerState(_specularFilter, 2)
.Build();
_pixelLitShaderState = PixelShaderBuilder
.ResetTo(_pixelLitShaderState)
.ShaderResource(normalSrv, 1)
.SamplerState(_diffuseFilter, 0)
.SamplerState(_normalFilter, 1)
.SamplerState(_specularFilter, 2)
.Build();
_lightingState = BatchStateBuilder
.ResetTo(_lightingState)
.PixelShaderState(_pixelLitShaderState)
.Build();
}
_gbufferTexture = _gbufferTargets[0].Texture.GetShaderResourceView();
}
/// <summary>
/// Function called when the effect is being initialized.
/// </summary>
/// <remarks>
/// Use this method to set up the effect upon its creation. For example, this method could be used to create the required shaders for the effect.
/// </remarks>
protected override void OnInitialize()
{
// Compile our blur shader.
_grayScaleShader = CompileShader <GorgonPixelShader>(Resources.BasicSprite, "GorgonPixelShaderGrayScale");
_grayScaleState = PixelShaderBuilder
.Shader(_grayScaleShader)
.Build();
_batchState = BatchStateBuilder
.PixelShaderState(_grayScaleState)
.Build();
}
/// <summary>
/// Function to return the object.
/// </summary>
/// <returns>The object created or updated by this builder.</returns>
public Gorgon2DShaderState <T> Build()
{
var shader = new Gorgon2DShaderState <T>
{
Shader = _workingShader.Shader
};
Copy(shader.RwConstantBuffers, _workingShader.RwConstantBuffers, 0);
Copy(shader.RwSrvs, _workingShader.RwSrvs, 0);
Copy(shader.RwSamplers, _workingShader.RwSamplers, 0);
return(shader);
}
/// <summary>
/// Function called to initialize the effect.
/// </summary>
/// <remarks>Applications must implement this method to ensure that any required resources are created, and configured for the effect.</remarks>
protected override void OnInitialize()
{
var globalData = new GlobalEffectData
{
CameraPosition = DX.Vector3.Zero,
FlipYNormal = 0
};
_globalData = GorgonConstantBufferView.CreateConstantBuffer(Graphics, ref globalData, "Global deferred light effect data.", ResourceUsage.Default);
_lightData = GorgonConstantBufferView.CreateConstantBuffer(Graphics,
new GorgonConstantBufferInfo("Deferred Lighting Light Data Buffer")
{
SizeInBytes = Unsafe.SizeOf <PointLightData>(),
Usage = ResourceUsage.Dynamic
});
Macros.Add(new GorgonShaderMacro("DEFERRED_LIGHTING"));
_vertexDeferShader = CompileShader <GorgonVertexShader>(Resources.Lighting, "GorgonVertexLightingShader");
_vertexDeferShaderState = VertexShaderBuilder.Shader(_vertexDeferShader)
.Build();
_pixelDeferShader = CompileShader <GorgonPixelShader>(Resources.Lighting, "GorgonPixelShaderDeferred");
_pixelDeferShaderState = PixelShaderBuilder.Shader(_pixelDeferShader)
.SamplerState(_diffuseFilter, 0)
.SamplerState(_normalFilter, 1)
.SamplerState(_specularFilter, 2)
.Build();
Macros.Clear();
Macros.Add(new GorgonShaderMacro("LIGHTS"));
_vertexLitShader = CompileShader <GorgonVertexShader>(Resources.Lighting, "GorgonVertexLitShader");
_vertexLitShaderState = VertexShaderBuilder.Shader(_vertexLitShader)
.Build();
_pixelLitShader = CompileShader <GorgonPixelShader>(Resources.Lighting, "GorgonPixelShaderLighting");
_pixelLitShaderState = PixelShaderBuilder.Shader(_pixelLitShader)
.ConstantBuffer(_lightData, 1)
.ConstantBuffer(_globalData, 2)
.SamplerState(_diffuseFilter, 0)
.SamplerState(_normalFilter, 1)
.SamplerState(_specularFilter, 2)
.Build();
// Rebuild our states for the new pixel shaders.
_lightingState = BatchStateBuilder.PixelShaderState(_pixelLitShaderState)
.VertexShaderState(_vertexLitShaderState)
.BlendState(GorgonBlendState.Additive)
.Build();
}
/// <summary>
/// Function to reset the builder to the specified object state.
/// </summary>
/// <param name="builderObject">[Optional] The specified object state to copy.</param>
/// <returns>The fluent builder interface.</returns>
public Gorgon2DShaderStateBuilder <T> ResetTo(Gorgon2DShaderState <T> builderObject = null)
{
if (builderObject == null)
{
Clear();
return(this);
}
Copy(_workingShader.RwConstantBuffers, builderObject.RwConstantBuffers, 0);
Copy(_workingShader.RwSrvs, builderObject.RwSrvs, 0);
Copy(_workingShader.RwSamplers, builderObject.RwSamplers, 0);
_workingShader.Shader = builderObject.Shader;
return(this);
}
/// <summary>
/// Function to return the object.
/// </summary>
/// <param name="allocator">The allocator used to create an instance of the object</param>
/// <returns>The object created or updated by this builder.</returns>
/// <remarks>
/// <para>
/// Using an <paramref name="allocator" /> can provide different strategies when building objects. If omitted, the object will be created using the standard <span class="keyword">new</span> keyword.
/// </para>
/// <para>
/// A custom allocator can be beneficial because it allows us to use a pool for allocating the objects, and thus allows for recycling of objects. This keeps the garbage collector happy by keeping objects
/// around for as long as we need them, instead of creating objects that can potentially end up in the large object heap or in Gen 2.
/// </para>
/// </remarks>
public Gorgon2DShaderState <T> Build(IGorgonAllocator <Gorgon2DShaderState <T> > allocator)
{
Gorgon2DShaderState <T> shader;
if (allocator == null)
{
shader = new Gorgon2DShaderState <T>();
}
else
{
shader = allocator.Allocate();
}
Copy(shader.RwConstantBuffers, _workingShader.RwConstantBuffers, 0);
Copy(shader.RwSrvs, _workingShader.RwSrvs, 0);
Copy(shader.RwSamplers, _workingShader.RwSamplers, 0);
shader.Shader = _workingShader.Shader;
return(shader);
}
/// <summary>
/// Function to assign a vertex shader state to the batch state.
/// </summary>
/// <param name="shader">The vertex shader and resources to assign, or <b>null</b> for a default vertex shader and states.</param>
/// <returns>The fluent builder interface.</returns>
public Gorgon2DBatchStateBuilder VertexShaderState(Gorgon2DShaderState <GorgonVertexShader> shader)
{
_worker.VertexShaderState = shader;
return(this);
}
/// <summary>
/// Function to assign a pixel shader state to the batch state.
/// </summary>
/// <param name="shader">The pixel shader and resources to assign, or <b>null</b> for a default pixel shader and states.</param>
/// <returns>The fluent builder interface.</returns>
public Gorgon2DBatchStateBuilder PixelShaderState(Gorgon2DShaderState <GorgonPixelShader> shader)
{
_worker.PixelShaderState = shader;
return(this);
}