/// <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>
/// PBR用プレフィルタキューブマップを作成する
/// </summary>
/// <param name="output"></param>
/// <param name="source"></param>
public static void PrefilterRadiance(Texture output, Texture source)
{
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("PrefilterRadianceMap", (uint)Shader.VertexAttr.TEXCOORD0);
prim.AddRect(ref rect);
prim.GetMaterial().DepthState = RenderState.DepthState.None;
prim.GetMaterial().SetShaderViewPS(0, source);
int miplevel = 1;
int size = source.Width;
while (size > 1)
{
size = size >> 1;
miplevel++;
}
// テクスチャを再生成
output.Dispose();
output.Initialize(new Texture.InitDesc()
{
bindFlag = TextureBuffer.BindFlag.IsRenderTarget,
optionFlags = ResourceOptionFlags.TextureCube,
width = source.Width,
height = source.Height,
mips = miplevel,
format = SlimDX.DXGI.Format.R16G16B16A16_Float,
});
GraphicsCore.FrameBuffer frameBuffer = new GraphicsCore.FrameBuffer();
frameBuffer.color_buffer_ = new Texture[1] {
output
};
frameBuffer.is_array_buffer_ = true;
// 描画
for (int m = 0; m < miplevel; m++)
{
for (int i = 0; i < 6; i++)
{
// コンスタントバッファ
Shader.SetConstantBufferUpdateFunc("CB_PrefilterCubeMap", (s, inst) => {
dynamic cb = inst;
cb.g_face = (float)i;
cb.g_mipLevel = (float)m;
cb.g_maxMipLevel = (float)miplevel;
return(true);
});
frameBuffer.array_buffer_index_ = m * 6 + i;
// TODO:
//GraphicsCore.BeginRender(frameBuffer);
//prim.Draw();
//GraphicsCore.EndRender();
}
}
prim.Dispose();
}
/// <summary>
///
/// </summary>
public ShadowMap(int width, int height, Type type = Type.VSM)
{
type_ = type;
shaderName_ = new string[] { "ConstructVSM", "ConstructEVSM" };
bufferFormat_ = new Format[] { Format.R16G16_Float, Format.R16G16B16A16_Float };
shadowMap_ = new Texture(new Texture.InitDesc {
width = width,
height = height,
format = Format.R32_Typeless,
bindFlag = TextureBuffer.BindFlag.IsDepthStencil,
});
blurMap_ = new Texture[2];
for (int i = 0; i < blurMap_.Length; i++)
{
Texture.InitDesc desc = new Texture.InitDesc()
{
width = width / 2,
height = height / 2,
format = bufferFormat_[(int)type_],
bindFlag = TextureBuffer.BindFlag.IsRenderTarget,
};
blurMap_[i] = new Texture(desc);
}
frameBuffer_ = new GraphicsCore.FrameBuffer()
{
color_buffer_ = new Texture[0],
depth_stencil_ = shadowMap_,
};
blurFrameBuffer_ = new GraphicsCore.FrameBuffer()
{
color_buffer_ = new Texture[1],
depth_stencil_ = null,
};
Lib.Rect rect = new Lib.Rect(new Vector3(-1.0f, 1.0f, 0.0f), new Vector3(1.0f, -1.0f, 0.0f));
blurPrim_ = new Prim(shaderName_[(int)type_], (uint)Shader.VertexAttr.TEXCOORD0);
blurPrim_.AddRect(ref rect);
blurPrim_.GetMaterial().DepthState = RenderState.DepthState.None;
camera_ = new Camera();
camera_.InitializeOrtho(new Vector3(0, 100, 0), new Vector3(0, 0, 0), new Vector3(0, 0, 1), 100, 100, 1, 100);
shadowCastShader_ = ShaderManager.FindShader("DrawShadowMap", (uint)(Shader.VertexAttr.POSITION));
shadowMapDrawShaderFunc_ = (o) => {
return(shadowCastShader_);
};
}
/// <summary>
///
/// </summary>
public DepthOperation(int w, int h)
{
ConstructTexture(w, h);
linearizeShader_ = ShaderManager.FindShader("LinearizeDepth", (uint)Shader.VertexAttr.TEXCOORD0);
halfLinearizeShader_ = ShaderManager.FindShader("Downsample2x2LinealizeDepth", (uint)Shader.VertexAttr.TEXCOORD0);
Shader.SetConstantBufferUpdateFunc("DepthParam", (s, i) => {
dynamic cb = i;
cb.g_ReprojectDepthScale = param_.g_ReprojectDepthScale;
cb.g_ReprojectDepthBias = param_.g_ReprojectDepthBias;
return(true);
});
frameBuffer_ = new GraphicsCore.FrameBuffer();
}
/// <summary>
/// キューブマップにレンダリング
/// </summary>
public static void RenderingCubeMap(GraphicsContext context, Texture cubemap, Texture depth, Vector3 position, Action sceneDrawFunc)
{
GraphicsCore.FrameBuffer frameBuffer = new GraphicsCore.FrameBuffer()
{
color_buffer_ = new Texture[1] {
cubemap
},
depth_stencil_ = depth,
is_array_buffer_ = true,
};
Camera backupCamera = GraphicsCore.CurrentDrawCamera;
Camera camera = new Camera();
// 右手対応のためx反転している
Matrix projection = Matrix.PerspectiveFovRH((float)System.Math.PI / 2.0f, 1.0f, 0.1f, 1000.0f) * Matrix.Scaling(-1, 1, 1);
Matrix view = Matrix.LookAtRH(position, Vector3.Zero, Vector3.UnitZ);
camera.InitializeExternal(view, projection);
GraphicsCore.CurrentDrawCamera = camera;
GraphicsCore.SetRasterizerState(RenderState.RasterizerState.CullFront);
// 各面をレンダリング
for (int i = 0; i < 6; ++i)
{
Vector3 lookAt = new Vector3();
Vector3 upVec = new Vector3();
switch (i)
{
case 0:
lookAt = new Vector3(1.0f, 0.0f, 0.0f);
upVec = new Vector3(0.0f, 1.0f, 0.0f);
break;
case 1:
lookAt = new Vector3(-1.0f, 0.0f, 0.0f);
upVec = new Vector3(0.0f, 1.0f, 0.0f);
break;
case 2:
lookAt = new Vector3(0.0f, 1.0f, 0.0f);
upVec = new Vector3(0.0f, 0.0f, -1.0f);
break;
case 3:
lookAt = new Vector3(0.0f, -1.0f, 0.0f);
upVec = new Vector3(0.0f, 0.0f, 1.0f);
break;
case 4:
lookAt = new Vector3(0.0f, 0.0f, 1.0f);
upVec = new Vector3(0.0f, 1.0f, 0.0f);
break;
case 5:
lookAt = new Vector3(0.0f, 0.0f, -1.0f);
upVec = new Vector3(0.0f, 1.0f, 0.0f);
break;
}
frameBuffer.array_buffer_index_ = i;
view = Matrix.LookAtRH(position, position + lookAt, upVec);
camera.SetViewMatrix(ref view);
camera.Update();
// TODO:要対応
//GraphicsCore.BeginRender(frameBuffer);
//sceneDrawFunc();
//GraphicsCore.EndRender();
}
GraphicsCore.CurrentDrawCamera = backupCamera;
GraphicsCore.SetRasterizerState(RenderState.RasterizerState.CullBack);
}
/// <summary>
///
/// </summary>
public ToneMap()
{
// サイズによってテクスチャを作り替える、ということをしたくないので
// FullHD想定でテクスチャを作成しておく
int w = 1920;
int h = 1080;
avgBuffer_ = new Texture[6];
var desc = new Texture.InitDesc()
{
bindFlag = TextureBuffer.BindFlag.IsRenderTarget,
width = w / 4,
height = h / 4,
format = SlimDX.DXGI.Format.R16_Float,
};
avgBuffer_[0] = new Texture(desc);
desc.width = w / 16;
desc.height = h / 16;
avgBuffer_[1] = new Texture(desc);
desc.width = w / 32;
desc.height = h / 32;
avgBuffer_[2] = new Texture(desc);
desc.width = w / 64;
desc.height = h / 64;
avgBuffer_[3] = new Texture(desc);
desc.width = w / 128;
desc.height = h / 128;
avgBuffer_[4] = new Texture(desc);
desc.width = w / 256;
desc.height = h / 256;
avgBuffer_[5] = new Texture(desc);
frameBuffer_ = new GraphicsCore.FrameBuffer()
{
color_buffer_ = new Texture[1],
depth_stencil_ = null,
};
var uavDesc_ = new Texture.InitDesc {
bindFlag = TextureBuffer.BindFlag.IsUnorderedAccess | TextureBuffer.BindFlag.IsRenderTarget,
width = 1,
height = 1,
format = SlimDX.DXGI.Format.R32_Float, // RWとして使うためには32bitにする必要がある
};
luminanceAvg_ = new Texture(uavDesc_);
Lib.Rect rect = new Lib.Rect(new Vector3(-1.0f, 1.0f, 0.0f), new Vector3(1.0f, -1.0f, 0.0f));
prim_ = new Prim("Downsample4x4CalcLuminance", (uint)Shader.VertexAttr.TEXCOORD0);
prim_.AddRect(ref rect);
prim_.GetMaterial().DepthState = RenderState.DepthState.None;
downSample4Lum_ = ShaderManager.FindShader("Downsample4x4CalcLuminance", (uint)Shader.VertexAttr.TEXCOORD0);
downSample4_ = ShaderManager.FindShader("Downsample4x4Luminance", (uint)Shader.VertexAttr.TEXCOORD0);
downSample2_ = ShaderManager.FindShader("Downsample2x2Luminance", (uint)Shader.VertexAttr.TEXCOORD0);
toneMap_ = ShaderManager.FindShader("ToneMap", (uint)Shader.VertexAttr.TEXCOORD0);
resolveGamma_ = ShaderManager.FindShader("ResolveGamma", (uint)Shader.VertexAttr.TEXCOORD0);
ComputeShader.InitDesc shaderDesc = new ComputeShader.InitDesc {
file_name = "asset/shader/ToneMap.fx",
id = 0,
is_byte_code = false,
main = "FinalCalculateAverageLuminance",
};
lumResolveShader_ = new ComputeShader(shaderDesc);
lumResolveShader_.SetUAVs(new Texture[] { luminanceAvg_ });
lumResolveShader_.SetResources(new Texture[] { avgBuffer_[5] });
initBuffer_ = false;
KeyValue = 0.2f;
Shader.SetConstantBufferUpdateFunc("CB_ToneMap", (s, i) => {
dynamic cb = i;
if (cb.g_keyValue != KeyValue)
{
cb.g_keyValue = KeyValue;
return(true);
}
return(false);
});
}
