/// <summary>
/// BRDFで使用するLUTを生成する(UE4方式)
/// </summary>
public static Texture CreateBRDFLookUpTable(GraphicsContext context, int w, int h)
{
var tex = new Texture(new Texture.InitDesc {
bindFlag = TextureBuffer.BindFlag.IsRenderTarget,
width = w,
height = h,
format = SlimDX.DXGI.Format.R16G16_Float,
});
Lib.Rect rect = new Lib.Rect(new Vector3(-1.0f, 1.0f, 0.0f), new Vector3(1.0f, -1.0f, 0.0f));
var prim = new Prim("GenerateBRDF_LUT", (uint)Shader.VertexAttr.TEXCOORD0);
prim.AddRect(ref rect);
prim.GetMaterial().DepthState = RenderState.DepthState.None;
GraphicsCore.FrameBuffer frameBuffer = new GraphicsCore.FrameBuffer();
frameBuffer.color_buffer_ = new Texture[1] {
tex
};
context.SetRenderTargets(frameBuffer.color_buffer_, null);
prim.Draw(context);
prim.Dispose();
return(tex);
}
/// <summary>
///
/// </summary>
public void BeginRender(GraphicsContext context)
{
GraphicsCore.CurrentDrawCamera = camera_;
context.SetRenderTargets(frameBuffer_.color_buffer_, frameBuffer_.depth_stencil_);
context.SetViewport(new SlimDX.Direct3D11.Viewport(0, 0, frameBuffer_.depth_stencil_.Width, frameBuffer_.depth_stencil_.Height));
context.ClearDepthStencil(frameBuffer_.depth_stencil_, 1.0f);
ShaderManager.UserShaderBindHandler += shadowMapDrawShaderFunc_;
}
/// <summary>
///
/// </summary>
public void Dispatch(GraphicsContext context, Texture depth, Camera camera)
{
float near = camera.Near;
float far = camera.Far;
param_.g_ReprojectDepthScale = (far - near) / (-far * near);
param_.g_ReprojectDepthBias = far / (far * near);
frameBuffer_.color_buffer_ = new Texture[1] {
linearBuffer_
};
frameBuffer_.depth_stencil_ = null;
context.SetRenderTargets(frameBuffer_.color_buffer_, frameBuffer_.depth_stencil_);
RenderingUtil.DrawScreen(context, linearizeShader_, new Texture[] { depth });
}
/// <summary>
///
/// </summary>
public void EndRender(GraphicsContext context)
{
ShaderManager.UserShaderBindHandler -= shadowMapDrawShaderFunc_;
// Generate SM
blurFrameBuffer_.color_buffer_[0] = blurMap_[0];
context.SetRenderTargets(blurFrameBuffer_.color_buffer_, blurFrameBuffer_.depth_stencil_);
context.SetViewport(new SlimDX.Direct3D11.Viewport(0, 0, blurFrameBuffer_.color_buffer_[0].Width, blurFrameBuffer_.color_buffer_[0].Height));
blurPrim_.GetMaterial().SetShader(shaderName_[(int)type_]);
blurPrim_.GetMaterial().SetShaderViewPS(0, shadowMap_);
blurPrim_.Draw(context);
blurFrameBuffer_.color_buffer_[0] = blurMap_[1];
context.SetRenderTargets(blurFrameBuffer_.color_buffer_, blurFrameBuffer_.depth_stencil_);
blurPrim_.GetMaterial().SetShader("GaussianBlurV");
blurPrim_.GetMaterial().SetShaderViewPS(0, blurMap_[0]);
blurPrim_.Draw(context);
blurFrameBuffer_.color_buffer_[0] = blurMap_[0];
context.SetRenderTargets(blurFrameBuffer_.color_buffer_, blurFrameBuffer_.depth_stencil_);
blurPrim_.GetMaterial().SetShader("GaussianBlurH");
blurPrim_.GetMaterial().SetShaderViewPS(0, blurMap_[1]);
blurPrim_.Draw(context);
}
/// <summary>
/// 輝度算出
/// </summary>
public void CalcLuminance(GraphicsContext context, Texture colorTex)
{
// 1/4
frameBuffer_.color_buffer_[0] = avgBuffer_[0];
context.SetRenderTargets(frameBuffer_.color_buffer_, null);
prim_.GetMaterial().SetShader(downSample4Lum_);
prim_.GetMaterial().SetShaderViewPS(0, colorTex);
prim_.Draw(context);
// 1/4
frameBuffer_.color_buffer_[0] = avgBuffer_[1];
context.SetRenderTargets(frameBuffer_.color_buffer_, null);
prim_.GetMaterial().SetShader(downSample4_);
prim_.GetMaterial().SetShaderViewPS(0, avgBuffer_[0]);
prim_.Draw(context);
// 1/2
frameBuffer_.color_buffer_[0] = avgBuffer_[2];
context.SetRenderTargets(frameBuffer_.color_buffer_, null);
prim_.GetMaterial().SetShader(downSample2_);
prim_.GetMaterial().SetShaderViewPS(0, avgBuffer_[1]);
prim_.Draw(context);
// 1/2
frameBuffer_.color_buffer_[0] = avgBuffer_[3];
context.SetRenderTargets(frameBuffer_.color_buffer_, null);
prim_.GetMaterial().SetShaderViewPS(0, avgBuffer_[2]);
prim_.Draw(context);
// 1/2
frameBuffer_.color_buffer_[0] = avgBuffer_[4];
context.SetRenderTargets(frameBuffer_.color_buffer_, null);
prim_.GetMaterial().SetShaderViewPS(0, avgBuffer_[3]);
prim_.Draw(context);
// 1/2
frameBuffer_.color_buffer_[0] = avgBuffer_[5];
context.SetRenderTargets(frameBuffer_.color_buffer_, null);
prim_.GetMaterial().SetShaderViewPS(0, avgBuffer_[4]);
prim_.Draw(context);
// 最終
if (!initBuffer_)
{
context.ClearRenderTarget(luminanceAvg_, new Color4(0, 0, 0, 0));
initBuffer_ = true;
}
lumResolveShader_.Bind();
lumResolveShader_.Dispatch(1, 1, 1);
lumResolveShader_.UnBind();
}