kc3-lang/angle/src/libGLESv2/renderer/Blit11.cpp

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• Hash : b2f3d05c
  Author :
  Date : 2013-08-13T12:49:27
  

  Replaced the custom component type and SRGB bool with GLenums.
  
  TRAC #23474
  
  Author: Geoff Lang
  Signed-off-by: Jamie Madill
  Signed-off-by: Shannon Woods
  

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• src/libGLESv2/renderer/Blit11.cpp

• #include "precompiled.h"
  //
  // Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // Blit11.cpp: Texture copy utility class.
  
  #include "libGLESv2/main.h"
  #include "libGLESv2/formatutils.h"
  #include "libGLESv2/renderer/Blit11.h"
  #include "libGLESv2/renderer/Renderer11.h"
  #include "libGLESv2/renderer/renderer11_utils.h"
  #include "libGLESv2/renderer/formatutils11.h"
  
  #include "libGLESv2/renderer/shaders/compiled/passthrough2d11vs.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughdepth2d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgba2d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgba2dui11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgba2di11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgb2d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgb2dui11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgb2di11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrg2d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrg2dui11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrg2di11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughr2d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughr2dui11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughr2di11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughlum2d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughlumalpha2d11ps.h"
  
  #include "libGLESv2/renderer/shaders/compiled/passthrough3d11vs.h"
  #include "libGLESv2/renderer/shaders/compiled/passthrough3d11gs.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgba3d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgba3dui11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgba3di11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgb3d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgb3dui11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrgb3di11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrg3d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrg3dui11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughrg3di11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughr3d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughr3dui11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughr3di11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughlum3d11ps.h"
  #include "libGLESv2/renderer/shaders/compiled/passthroughlumalpha3d11ps.h"
  
  namespace rx
  {
  
  Blit11::Blit11(rx::Renderer11 *renderer)
      : mRenderer(renderer), mShaderMap(compareBlitParameters), mVertexBuffer(NULL),
        mPointSampler(NULL), mLinearSampler(NULL), mRasterizerState(NULL), mDepthStencilState(NULL),
        mQuad2DIL(NULL), mQuad2DVS(NULL), mDepthPS(NULL),
        mQuad3DIL(NULL), mQuad3DVS(NULL), mQuad3DGS(NULL)
  {
      HRESULT result;
      ID3D11Device *device = mRenderer->getDevice();
  
      D3D11_BUFFER_DESC vbDesc;
      vbDesc.ByteWidth = std::max(sizeof(d3d11::PositionLayerTexCoord3DVertex) * 6 * renderer->getMaxTextureDepth(),
                                  sizeof(d3d11::PositionTexCoordVertex) * 4);
      vbDesc.Usage = D3D11_USAGE_DYNAMIC;
      vbDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
      vbDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
      vbDesc.MiscFlags = 0;
      vbDesc.StructureByteStride = 0;
  
      result = device->CreateBuffer(&vbDesc, NULL, &mVertexBuffer);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mVertexBuffer, "Blit11 vertex buffer");
  
      D3D11_SAMPLER_DESC pointSamplerDesc;
      pointSamplerDesc.Filter = D3D11_FILTER_MIN_MAG_POINT_MIP_LINEAR;
      pointSamplerDesc.AddressU = D3D11_TEXTURE_ADDRESS_CLAMP;
      pointSamplerDesc.AddressV = D3D11_TEXTURE_ADDRESS_CLAMP;
      pointSamplerDesc.AddressW = D3D11_TEXTURE_ADDRESS_CLAMP;
      pointSamplerDesc.MipLODBias = 0.0f;
      pointSamplerDesc.MaxAnisotropy = 0;
      pointSamplerDesc.ComparisonFunc = D3D11_COMPARISON_NEVER;
      pointSamplerDesc.BorderColor[0] = 0.0f;
      pointSamplerDesc.BorderColor[1] = 0.0f;
      pointSamplerDesc.BorderColor[2] = 0.0f;
      pointSamplerDesc.BorderColor[3] = 0.0f;
      pointSamplerDesc.MinLOD = 0.0f;
      pointSamplerDesc.MaxLOD = 0.0f;
  
      result = device->CreateSamplerState(&pointSamplerDesc, &mPointSampler);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mPointSampler, "Blit11 point sampler");
  
      D3D11_SAMPLER_DESC linearSamplerDesc;
      linearSamplerDesc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
      linearSamplerDesc.AddressU = D3D11_TEXTURE_ADDRESS_CLAMP;
      linearSamplerDesc.AddressV = D3D11_TEXTURE_ADDRESS_CLAMP;
      linearSamplerDesc.AddressW = D3D11_TEXTURE_ADDRESS_CLAMP;
      linearSamplerDesc.MipLODBias = 0.0f;
      linearSamplerDesc.MaxAnisotropy = 0;
      linearSamplerDesc.ComparisonFunc = D3D11_COMPARISON_NEVER;
      linearSamplerDesc.BorderColor[0] = 0.0f;
      linearSamplerDesc.BorderColor[1] = 0.0f;
      linearSamplerDesc.BorderColor[2] = 0.0f;
      linearSamplerDesc.BorderColor[3] = 0.0f;
      linearSamplerDesc.MinLOD = 0.0f;
      linearSamplerDesc.MaxLOD = 0.0f;
  
      result = device->CreateSamplerState(&linearSamplerDesc, &mLinearSampler);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mLinearSampler, "Blit11 linear sampler");
  
      // Use a rasterizer state that will not cull so that inverted quads will not be culled
      D3D11_RASTERIZER_DESC rasterDesc;
      rasterDesc.FillMode = D3D11_FILL_SOLID;
      rasterDesc.CullMode = D3D11_CULL_NONE;
      rasterDesc.FrontCounterClockwise = FALSE;
      rasterDesc.DepthBias = 0;
      rasterDesc.SlopeScaledDepthBias = 0.0f;
      rasterDesc.DepthBiasClamp = 0.0f;
      rasterDesc.DepthClipEnable = TRUE;
      rasterDesc.ScissorEnable = FALSE;
      rasterDesc.MultisampleEnable = FALSE;
      rasterDesc.AntialiasedLineEnable = FALSE;
  
      result = device->CreateRasterizerState(&rasterDesc, &mRasterizerState);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mRasterizerState, "Blit11 rasterizer state");
  
      D3D11_DEPTH_STENCIL_DESC depthStencilDesc;
      depthStencilDesc.DepthEnable = true;
      depthStencilDesc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
      depthStencilDesc.DepthFunc = D3D11_COMPARISON_ALWAYS;
      depthStencilDesc.StencilEnable = FALSE;
      depthStencilDesc.StencilReadMask = D3D11_DEFAULT_STENCIL_READ_MASK;
      depthStencilDesc.StencilWriteMask = D3D11_DEFAULT_STENCIL_WRITE_MASK;
      depthStencilDesc.FrontFace.StencilFailOp = D3D11_STENCIL_OP_KEEP;
      depthStencilDesc.FrontFace.StencilDepthFailOp = D3D11_STENCIL_OP_KEEP;
      depthStencilDesc.FrontFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
      depthStencilDesc.FrontFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
      depthStencilDesc.BackFace.StencilFailOp = D3D11_STENCIL_OP_KEEP;
      depthStencilDesc.BackFace.StencilDepthFailOp = D3D11_STENCIL_OP_KEEP;
      depthStencilDesc.BackFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
      depthStencilDesc.BackFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
  
      result = device->CreateDepthStencilState(&depthStencilDesc, &mDepthStencilState);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mDepthStencilState, "Blit11 depth stencil state");
  
      D3D11_INPUT_ELEMENT_DESC quad2DLayout[] =
      {
          { "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0 },
          { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 8, D3D11_INPUT_PER_VERTEX_DATA, 0 },
      };
  
      result = device->CreateInputLayout(quad2DLayout, ArraySize(quad2DLayout), g_VS_Passthrough2D, ArraySize(g_VS_Passthrough2D), &mQuad2DIL);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mQuad2DIL, "Blit11 2D input layout");
  
      result = device->CreateVertexShader(g_VS_Passthrough2D, ArraySize(g_VS_Passthrough2D), NULL, &mQuad2DVS);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mQuad2DVS, "Blit11 2D vertex shader");
  
      result = device->CreatePixelShader(g_PS_PassthroughDepth2D, ArraySize(g_PS_PassthroughDepth2D), NULL, &mDepthPS);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mDepthPS, "Blit11 2D depth pixel shader");
  
      D3D11_INPUT_ELEMENT_DESC quad3DLayout[] =
      {
          { "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT,    0,  0, D3D11_INPUT_PER_VERTEX_DATA, 0 },
          { "LAYER",    0, DXGI_FORMAT_R32_UINT,        0,  8, D3D11_INPUT_PER_VERTEX_DATA, 0 },
          { "TEXCOORD", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0 },
      };
  
      result = device->CreateInputLayout(quad3DLayout, ArraySize(quad3DLayout), g_VS_Passthrough3D, ArraySize(g_VS_Passthrough3D), &mQuad3DIL);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mQuad3DIL, "Blit11 3D input layout");
  
      result = device->CreateVertexShader(g_VS_Passthrough3D, ArraySize(g_VS_Passthrough3D), NULL, &mQuad3DVS);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mQuad3DVS, "Blit11 3D vertex shader");
  
      result = device->CreateGeometryShader(g_GS_Passthrough3D, ArraySize(g_GS_Passthrough3D), NULL, &mQuad3DGS);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(mQuad3DGS, "Renderer11 copy 3D texture geometry shader");
  
      buildShaderMap();
  }
  
  Blit11::~Blit11()
  {
      SafeRelease(mVertexBuffer);
      SafeRelease(mPointSampler);
      SafeRelease(mLinearSampler);
      SafeRelease(mRasterizerState);
      SafeRelease(mDepthStencilState);
  
      SafeRelease(mQuad2DIL);
      SafeRelease(mQuad2DVS);
      SafeRelease(mDepthPS);
  
      SafeRelease(mQuad3DIL);
      SafeRelease(mQuad3DVS);
      SafeRelease(mQuad3DGS);
  
      clearShaderMap();
  }
  
  bool Blit11::copyTexture(ID3D11ShaderResourceView *source, const gl::Box &sourceArea, const gl::Extents &sourceSize,
                           ID3D11RenderTargetView *dest, const gl::Box &destArea, const gl::Extents &destSize,
                           GLenum destFormat, GLenum filter)
  {
      if(sourceArea.x < 0 || sourceArea.x + sourceArea.width  > sourceSize.width  ||
         sourceArea.y < 0 || sourceArea.y + sourceArea.height > sourceSize.height ||
         sourceArea.z < 0 || sourceArea.z + sourceArea.depth  > sourceSize.depth  ||
         destArea.x   < 0 || destArea.x   + destArea.width    > destSize.width    ||
         destArea.y   < 0 || destArea.y   + destArea.height   > destSize.height   ||
         destArea.z   < 0 || destArea.z   + destArea.depth    > destSize.depth    )
      {
          return false;
      }
  
      HRESULT result;
      ID3D11DeviceContext *deviceContext = mRenderer->getDeviceContext();
  
      // Determine if the source format is a signed integer format, the destFormat will already
      // be GL_XXXX_INTEGER but it does not tell us if it is signed or unsigned.
      D3D11_SHADER_RESOURCE_VIEW_DESC sourceSRVDesc;
      source->GetDesc(&sourceSRVDesc);
      GLint sourceInternalFormat = d3d11_gl::GetInternalFormat(sourceSRVDesc.Format, mRenderer->getCurrentClientVersion());
  
      BlitParameters parameters = { 0 };
      parameters.mDestinationFormat = destFormat;
      parameters.mSignedInteger = gl::GetComponentType(sourceInternalFormat, mRenderer->getCurrentClientVersion()) == GL_INT;
      parameters.m3DBlit = sourceArea.depth > 1;
  
      BlitShaderMap::const_iterator i = mShaderMap.find(parameters);
      if (i == mShaderMap.end())
      {
          UNREACHABLE();
          return false;
      }
  
      const BlitShader& shader = i->second;
  
      // Set vertices
      D3D11_MAPPED_SUBRESOURCE mappedResource;
      result = deviceContext->Map(mVertexBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
      if (FAILED(result))
      {
          ERR("Failed to map vertex buffer for texture copy, HRESULT: 0x%X.", result);
          return false;
      }
  
      UINT stride = 0;
      UINT startIdx = 0;
      UINT drawCount = 0;
      D3D11_PRIMITIVE_TOPOLOGY topology;
  
      shader.mVertexWriteFunction(sourceArea, sourceSize, destArea, destSize, mappedResource.pData,
                                  &stride, &drawCount, &topology);
  
      deviceContext->Unmap(mVertexBuffer, 0);
  
      // Apply vertex buffer
      deviceContext->IASetVertexBuffers(0, 1, &mVertexBuffer, &stride, &startIdx);
  
      // Apply state
      deviceContext->OMSetBlendState(NULL, NULL, 0xFFFFFFF);
      deviceContext->OMSetDepthStencilState(NULL, 0xFFFFFFFF);
      deviceContext->RSSetState(mRasterizerState);
  
      // Apply shaders
      deviceContext->IASetInputLayout(shader.mInputLayout);
      deviceContext->IASetPrimitiveTopology(topology);
      deviceContext->VSSetShader(shader.mVertexShader, NULL, 0);
  
      deviceContext->PSSetShader(shader.mPixelShader, NULL, 0);
      deviceContext->GSSetShader(shader.mGeometryShader, NULL, 0);
  
      // Unset the currently bound shader resource to avoid conflicts
      ID3D11ShaderResourceView *const nullSRV = NULL;
      deviceContext->PSSetShaderResources(0, 1, &nullSRV);
  
      // Apply render target
      mRenderer->setOneTimeRenderTarget(dest);
  
      // Set the viewport
      D3D11_VIEWPORT viewport;
      viewport.TopLeftX = 0;
      viewport.TopLeftY = 0;
      viewport.Width = destSize.width;
      viewport.Height = destSize.height;
      viewport.MinDepth = 0.0f;
      viewport.MaxDepth = 1.0f;
      deviceContext->RSSetViewports(1, &viewport);
  
      // Apply textures
      deviceContext->PSSetShaderResources(0, 1, &source);
  
      // Apply samplers
      ID3D11SamplerState *sampler = NULL;
      switch (filter)
      {
        case GL_NEAREST: sampler = mPointSampler;  break;
        case GL_LINEAR:  sampler = mLinearSampler; break;
        default:         UNREACHABLE(); return false;
      }
      deviceContext->PSSetSamplers(0, 1, &sampler);
  
      // Draw the quad
      deviceContext->Draw(drawCount, 0);
  
      // Unbind textures and render targets and vertex buffer
      deviceContext->PSSetShaderResources(0, 1, &nullSRV);
  
      mRenderer->unapplyRenderTargets();
  
      UINT zero = 0;
      ID3D11Buffer *const nullBuffer = NULL;
      deviceContext->IASetVertexBuffers(0, 1, &nullBuffer, &zero, &zero);
  
      mRenderer->markAllStateDirty();
  
      return true;
  }
  
  static ID3D11Resource *createStagingTexture(ID3D11Device *device, ID3D11DeviceContext *context,
                                              ID3D11Resource *source, unsigned int subresource,
                                              const gl::Extents &size, unsigned int cpuAccessFlags)
  {
      ID3D11Texture2D *sourceTexture = d3d11::DynamicCastComObject<ID3D11Texture2D>(source);
      if (!sourceTexture)
      {
          return NULL;
      }
  
      D3D11_TEXTURE2D_DESC sourceDesc;
      sourceTexture->GetDesc(&sourceDesc);
  
      if (sourceDesc.SampleDesc.Count > 1)
      {
          // Creating a staging texture of a multisampled texture is not supported
          SafeRelease(sourceTexture);
          return NULL;
      }
  
      D3D11_TEXTURE2D_DESC stagingDesc;
      stagingDesc.Width = size.width;
      stagingDesc.Height = size.height;
      stagingDesc.MipLevels = 1;
      stagingDesc.ArraySize = 1;
      stagingDesc.Format = sourceDesc.Format;
      stagingDesc.SampleDesc.Count = 1;
      stagingDesc.SampleDesc.Quality = 0;
      stagingDesc.Usage = D3D11_USAGE_STAGING;
      stagingDesc.CPUAccessFlags = cpuAccessFlags;
      stagingDesc.MiscFlags = 0;
      stagingDesc.BindFlags = 0;
  
      SafeRelease(sourceTexture);
  
      ID3D11Texture2D *stagingTexture = NULL;
      HRESULT result = device->CreateTexture2D(&stagingDesc, NULL, &stagingTexture);
  
      context->CopySubresourceRegion(stagingTexture, 0, 0, 0, 0, source, subresource, NULL);
  
      return stagingTexture;
  }
  
  static DXGI_FORMAT getTextureFormat(ID3D11Resource *resource)
  {
      ID3D11Texture2D *texture = d3d11::DynamicCastComObject<ID3D11Texture2D>(resource);
      if (!texture)
      {
          return DXGI_FORMAT_UNKNOWN;
      }
  
      D3D11_TEXTURE2D_DESC desc;
      texture->GetDesc(&desc);
  
      SafeRelease(texture);
  
      return desc.Format;
  }
  
  inline static void generateVertexCoords(const gl::Box &sourceArea, const gl::Extents &sourceSize,
                                          const gl::Box &destArea, const gl::Extents &destSize,
                                          float *x1, float *y1, float *x2, float *y2,
                                          float *u1, float *v1, float *u2, float *v2)
  {
      *x1 = (destArea.x / float(destSize.width)) * 2.0f - 1.0f;
      *y1 = ((destSize.height - destArea.y - destArea.height) / float(destSize.height)) * 2.0f - 1.0f;
      *x2 = ((destArea.x + destArea.width) / float(destSize.width)) * 2.0f - 1.0f;
      *y2 = ((destSize.height - destArea.y) / float(destSize.height)) * 2.0f - 1.0f;
  
      *u1 = sourceArea.x / float(sourceSize.width);
      *v1 = sourceArea.y / float(sourceSize.height);
      *u2 = (sourceArea.x + sourceArea.width) / float(sourceSize.width);
      *v2 = (sourceArea.y + sourceArea.height) / float(sourceSize.height);
  }
  
  static void write2DVertices(const gl::Box &sourceArea, const gl::Extents &sourceSize,
                              const gl::Box &destArea, const gl::Extents &destSize,
                              void *outVertices, unsigned int *outStride, unsigned int *outVertexCount,
                              D3D11_PRIMITIVE_TOPOLOGY *outTopology)
  {
      float x1, y1, x2, y2, u1, v1, u2, v2;
      generateVertexCoords(sourceArea, sourceSize, destArea, destSize, &x1, &y1, &x2, &y2, &u1, &v1, &u2, &v2);
  
      d3d11::PositionTexCoordVertex *vertices = static_cast<d3d11::PositionTexCoordVertex*>(outVertices);
  
      d3d11::SetPositionTexCoordVertex(&vertices[0], x1, y1, u1, v2);
      d3d11::SetPositionTexCoordVertex(&vertices[1], x1, y2, u1, v1);
      d3d11::SetPositionTexCoordVertex(&vertices[2], x2, y1, u2, v2);
      d3d11::SetPositionTexCoordVertex(&vertices[3], x2, y2, u2, v1);
  
      *outStride = sizeof(d3d11::PositionTexCoordVertex);
      *outVertexCount = 4;
      *outTopology = D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP;
  }
  
  static void write3DVertices(const gl::Box &sourceArea, const gl::Extents &sourceSize,
                              const gl::Box &destArea, const gl::Extents &destSize,
                              void *outVertices, unsigned int *outStride, unsigned int *outVertexCount,
                              D3D11_PRIMITIVE_TOPOLOGY *outTopology)
  {
      float x1, y1, x2, y2, u1, v1, u2, v2;
      generateVertexCoords(sourceArea, sourceSize, destArea, destSize, &x1, &y1, &x2, &y2, &u1, &v1, &u2, &v2);
  
      d3d11::PositionLayerTexCoord3DVertex *vertices = static_cast<d3d11::PositionLayerTexCoord3DVertex*>(outVertices);
  
      for (int i = 0; i < destSize.depth; i++)
      {
          float readDepth = ((i * 2) + 0.5f) / (sourceSize.depth - 1);
  
          d3d11::SetPositionLayerTexCoord3DVertex(&vertices[i * 6 + 0], x1, y1, i, u1, v2, readDepth);
          d3d11::SetPositionLayerTexCoord3DVertex(&vertices[i * 6 + 1], x1, y2, i, u1, v1, readDepth);
          d3d11::SetPositionLayerTexCoord3DVertex(&vertices[i * 6 + 2], x2, y1, i, u2, v2, readDepth);
  
          d3d11::SetPositionLayerTexCoord3DVertex(&vertices[i * 6 + 3], x1, y2, i, u1, v1, readDepth);
          d3d11::SetPositionLayerTexCoord3DVertex(&vertices[i * 6 + 4], x2, y2, i, u2, v1, readDepth);
          d3d11::SetPositionLayerTexCoord3DVertex(&vertices[i * 6 + 5], x2, y1, i, u2, v2, readDepth);
      }
  
      *outStride = sizeof(d3d11::PositionLayerTexCoord3DVertex);
      *outVertexCount = destSize.depth * 6;
      *outTopology = D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST;
  }
  
  bool Blit11::copyStencil(ID3D11Resource *source, unsigned int sourceSubresource, const gl::Box &sourceArea, const gl::Extents &sourceSize,
                           ID3D11Resource *dest, unsigned int destSubresource, const gl::Box &destArea, const gl::Extents &destSize)
  {
      return copyDepthStencil(source, sourceSubresource, sourceArea, sourceSize,
                              dest, destSubresource, destArea, destSize,
                              true);
  }
  
  bool Blit11::copyDepth(ID3D11ShaderResourceView *source, const gl::Box &sourceArea, const gl::Extents &sourceSize,
                         ID3D11DepthStencilView *dest, const gl::Box &destArea, const gl::Extents &destSize)
  {
      HRESULT result;
      ID3D11DeviceContext *deviceContext = mRenderer->getDeviceContext();
  
      // Set vertices
      D3D11_MAPPED_SUBRESOURCE mappedResource;
      result = deviceContext->Map(mVertexBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
      if (FAILED(result))
      {
          ERR("Failed to map vertex buffer for texture copy, HRESULT: 0x%X.", result);
          return false;
      }
  
      UINT stride = 0;
      UINT startIdx = 0;
      UINT drawCount = 0;
      D3D11_PRIMITIVE_TOPOLOGY topology;
  
      write2DVertices(sourceArea, sourceSize, destArea, destSize, mappedResource.pData,
                      &stride, &drawCount, &topology);
  
      deviceContext->Unmap(mVertexBuffer, 0);
  
      // Apply vertex buffer
      deviceContext->IASetVertexBuffers(0, 1, &mVertexBuffer, &stride, &startIdx);
  
      // Apply state
      deviceContext->OMSetBlendState(NULL, NULL, 0xFFFFFFF);
      deviceContext->OMSetDepthStencilState(mDepthStencilState, 0xFFFFFFFF);
      deviceContext->RSSetState(mRasterizerState);
  
      // Apply shaders
      deviceContext->IASetInputLayout(mQuad2DIL);
      deviceContext->IASetPrimitiveTopology(topology);
      deviceContext->VSSetShader(mQuad2DVS, NULL, 0);
  
      deviceContext->PSSetShader(mDepthPS, NULL, 0);
      deviceContext->GSSetShader(NULL, NULL, 0);
  
      // Unset the currently bound shader resource to avoid conflicts
      ID3D11ShaderResourceView *const nullSRV = NULL;
      deviceContext->PSSetShaderResources(0, 1, &nullSRV);
  
      // Apply render target
      deviceContext->OMSetRenderTargets(0, NULL, dest);
  
      // Set the viewport
      D3D11_VIEWPORT viewport;
      viewport.TopLeftX = 0;
      viewport.TopLeftY = 0;
      viewport.Width = destSize.width;
      viewport.Height = destSize.height;
      viewport.MinDepth = 0.0f;
      viewport.MaxDepth = 1.0f;
      deviceContext->RSSetViewports(1, &viewport);
  
      // Apply textures
      deviceContext->PSSetShaderResources(0, 1, &source);
  
      // Apply samplers
      deviceContext->PSSetSamplers(0, 1, &mPointSampler);
  
      // Draw the quad
      deviceContext->Draw(drawCount, 0);
  
      // Unbind textures and render targets and vertex buffer
      deviceContext->PSSetShaderResources(0, 1, &nullSRV);
  
      mRenderer->unapplyRenderTargets();
  
      UINT zero = 0;
      ID3D11Buffer *const nullBuffer = NULL;
      deviceContext->IASetVertexBuffers(0, 1, &nullBuffer, &zero, &zero);
  
      mRenderer->markAllStateDirty();
  
      return true;
  }
  
  bool Blit11::copyDepthStencil(ID3D11Resource *source, unsigned int sourceSubresource, const gl::Box &sourceArea, const gl::Extents &sourceSize,
                                ID3D11Resource *dest, unsigned int destSubresource, const gl::Box &destArea, const gl::Extents &destSize)
  {
      return copyDepthStencil(source, sourceSubresource, sourceArea, sourceSize,
                              dest, destSubresource, destArea, destSize,
                              false);
  }
  
  bool Blit11::copyDepthStencil(ID3D11Resource *source, unsigned int sourceSubresource, const gl::Box &sourceArea, const gl::Extents &sourceSize,
                                ID3D11Resource *dest, unsigned int destSubresource, const gl::Box &destArea, const gl::Extents &destSize,
                                bool stencilOnly)
  {
      ID3D11Device *device = mRenderer->getDevice();
      ID3D11DeviceContext *deviceContext = mRenderer->getDeviceContext();
  
      ID3D11Resource *sourceStaging = createStagingTexture(device, deviceContext, source, sourceSubresource, sourceSize, D3D11_CPU_ACCESS_READ);
      ID3D11Resource *destStaging = createStagingTexture(device, deviceContext, dest, destSubresource, destSize, D3D11_CPU_ACCESS_WRITE);
  
      DXGI_FORMAT format = getTextureFormat(source);
      ASSERT(format == getTextureFormat(dest));
  
      unsigned int pixelSize = d3d11::GetFormatPixelBytes(format, mRenderer->getCurrentClientVersion());
      unsigned int copyOffset = 0;
      unsigned int copySize = pixelSize;
      if (stencilOnly)
      {
          copyOffset = d3d11::GetStencilOffset(format) / 8;
          copySize = d3d11::GetStencilBits(format) / 8;
  
          // It would be expensive to have non-byte sized stencil sizes since it would
          // require reading from the destination, currently there arn't any though.
          ASSERT(d3d11::GetStencilBits(format)   % 8 == 0 &&
                 d3d11::GetStencilOffset(format) % 8 == 0);
      }
  
      D3D11_MAPPED_SUBRESOURCE sourceMapping, destMapping;
      deviceContext->Map(sourceStaging, 0, D3D11_MAP_READ, 0, &sourceMapping);
      deviceContext->Map(destStaging, 0, D3D11_MAP_WRITE, 0, &destMapping);
  
      int startDestY = std::min(destArea.y, destArea.y + destArea.height);
      int endDestY = std::max(destArea.y, destArea.y + destArea.height);
  
      int startDestX = std::min(destArea.x, destArea.x + destArea.width);
      int endDestX = std::max(destArea.x, destArea.x + destArea.width);
  
      for (int y = startDestY; y < endDestY; y++)
      {
          float yPerc = static_cast<float>(y - startDestY) / (endDestY - startDestY - 1);
          unsigned int readRow = sourceArea.y + floor(yPerc * (sourceArea.height - 1) + 0.5f);
          unsigned int writeRow = y;
  
          if (sourceArea.width == destArea.width && copySize == pixelSize)
          {
              void *sourceRow = reinterpret_cast<char*>(sourceMapping.pData) +
                                readRow * sourceMapping.RowPitch;
  
              void *destRow = reinterpret_cast<char*>(destMapping.pData) +
                              writeRow * destMapping.RowPitch;
  
              memcpy(destRow, sourceRow, pixelSize * destArea.width);
          }
          else
          {
              for (int x = startDestX; x < endDestX; x++)
              {
                  float xPerc = static_cast<float>(x - startDestX) / (endDestX - startDestX - 1);
                  unsigned int readColumn = sourceArea.x + floor(xPerc * (sourceArea.width - 1) + 0.5f);
                  unsigned int writeColumn = x;
  
                  void *sourcePixel = reinterpret_cast<char*>(sourceMapping.pData) +
                                      readRow * sourceMapping.RowPitch +
                                      readColumn * pixelSize +
                                      copyOffset;
  
                  void *destPixel = reinterpret_cast<char*>(destMapping.pData) +
                                    writeRow * destMapping.RowPitch +
                                    writeColumn * pixelSize +
                                    copyOffset;
  
                  memcpy(destPixel, sourcePixel, copySize);
              }
          }
      }
  
      deviceContext->Unmap(sourceStaging, 0);
      deviceContext->Unmap(destStaging, 0);
  
      deviceContext->CopySubresourceRegion(dest, destSubresource, 0, 0, 0, destStaging, 0, NULL);
  
      SafeRelease(sourceStaging);
      SafeRelease(destStaging);
  
      return true;
  }
  
  bool Blit11::compareBlitParameters(const Blit11::BlitParameters &a, const Blit11::BlitParameters &b)
  {
      return memcmp(&a, &b, sizeof(Blit11::BlitParameters)) < 0;
  }
  
  template <unsigned int N>
  static ID3D11PixelShader *compilePS(ID3D11Device *device, const BYTE (&byteCode)[N], const char *name)
  {
      ID3D11PixelShader *ps = NULL;
      HRESULT result = device->CreatePixelShader(byteCode, N, NULL, &ps);
      ASSERT(SUCCEEDED(result));
      d3d11::SetDebugName(ps, name);
      return ps;
  }
  
  void Blit11::add2DShaderToMap(GLenum destFormat, bool signedInteger, ID3D11PixelShader *ps)
  {
      BlitParameters params = { 0 };
      params.mDestinationFormat = destFormat;
      params.mSignedInteger = signedInteger;
      params.m3DBlit = false;
  
      ASSERT(mShaderMap.find(params) == mShaderMap.end());
      ASSERT(ps);
  
      BlitShader shader;
      shader.mVertexWriteFunction = write2DVertices;
      shader.mInputLayout = mQuad2DIL;
      shader.mVertexShader = mQuad2DVS;
      shader.mGeometryShader = NULL;
      shader.mPixelShader = ps;
  
      mShaderMap[params] = shader;
  }
  
  void Blit11::add3DShaderToMap(GLenum destFormat, bool signedInteger, ID3D11PixelShader *ps)
  {
      BlitParameters params = { 0 };
      params.mDestinationFormat = destFormat;
      params.mSignedInteger = signedInteger;
      params.m3DBlit = true;
  
      ASSERT(mShaderMap.find(params) == mShaderMap.end());
      ASSERT(ps);
  
      BlitShader shader;
      shader.mVertexWriteFunction = write3DVertices;
      shader.mInputLayout = mQuad3DIL;
      shader.mVertexShader = mQuad3DVS;
      shader.mGeometryShader = mQuad3DGS;
      shader.mPixelShader = ps;
  
      mShaderMap[params] = shader;
  }
  
  void Blit11::buildShaderMap()
  {
      ID3D11Device *device = mRenderer->getDevice();
  
      add2DShaderToMap(GL_RGBA,            false, compilePS(device, g_PS_PassthroughRGBA2D,     "Blit11 2D RGBA pixel shader"           ));
      add2DShaderToMap(GL_RGBA_INTEGER,    false, compilePS(device, g_PS_PassthroughRGBA2DUI,   "Blit11 2D RGBA UI pixel shader"        ));
      add2DShaderToMap(GL_RGBA_INTEGER,    true,  compilePS(device, g_PS_PassthroughRGBA2DI,    "Blit11 2D RGBA I pixel shader"         ));
      add2DShaderToMap(GL_BGRA_EXT,        false, compilePS(device, g_PS_PassthroughRGBA2D,     "Blit11 2D BGRA pixel shader"           ));
      add2DShaderToMap(GL_RGB,             false, compilePS(device, g_PS_PassthroughRGB2D,      "Blit11 2D RGB pixel shader"            ));
      add2DShaderToMap(GL_RGB_INTEGER,     false, compilePS(device, g_PS_PassthroughRGB2DUI,    "Blit11 2D RGB UI pixel shader"         ));
      add2DShaderToMap(GL_RGB_INTEGER,     true,  compilePS(device, g_PS_PassthroughRGB2DI,     "Blit11 2D RGB I pixel shader"          ));
      add2DShaderToMap(GL_RG,              false, compilePS(device, g_PS_PassthroughRG2D,       "Blit11 2D RG pixel shader"             ));
      add2DShaderToMap(GL_RG_INTEGER,      false, compilePS(device, g_PS_PassthroughRG2DUI,     "Blit11 2D RG UI pixel shader"          ));
      add2DShaderToMap(GL_RG_INTEGER,      true,  compilePS(device, g_PS_PassthroughRG2DI,      "Blit11 2D RG I pixel shader"           ));
      add2DShaderToMap(GL_RED,             false, compilePS(device, g_PS_PassthroughR2D,        "Blit11 2D R pixel shader"              ));
      add2DShaderToMap(GL_RED_INTEGER,     false, compilePS(device, g_PS_PassthroughR2DUI,      "Blit11 2D R UI pixel shader"           ));
      add2DShaderToMap(GL_RED_INTEGER,     true,  compilePS(device, g_PS_PassthroughR2DI,       "Blit11 2D R I pixel shader"            ));
      add2DShaderToMap(GL_ALPHA,           false, compilePS(device, g_PS_PassthroughRGBA2D,     "Blit11 2D alpha pixel shader"          ));
      add2DShaderToMap(GL_LUMINANCE,       false, compilePS(device, g_PS_PassthroughLum2D,      "Blit11 2D lum pixel shader"            ));
      add2DShaderToMap(GL_LUMINANCE_ALPHA, false, compilePS(device, g_PS_PassthroughLumAlpha2D, "Blit11 2D luminance alpha pixel shader"));
  
      add3DShaderToMap(GL_RGBA,            false, compilePS(device, g_PS_PassthroughRGBA3D,     "Blit11 3D RGBA pixel shader"           ));
      add3DShaderToMap(GL_RGBA_INTEGER,    false, compilePS(device, g_PS_PassthroughRGBA3DUI,   "Blit11 3D UI RGBA pixel shader"        ));
      add3DShaderToMap(GL_RGBA_INTEGER,    true,  compilePS(device, g_PS_PassthroughRGBA3DI,    "Blit11 3D I RGBA pixel shader"         ));
      add3DShaderToMap(GL_BGRA_EXT,        false, compilePS(device, g_PS_PassthroughRGBA3D,     "Blit11 3D BGRA pixel shader"           ));
      add3DShaderToMap(GL_RGB,             false, compilePS(device, g_PS_PassthroughRGB3D,      "Blit11 3D RGB pixel shader"            ));
      add3DShaderToMap(GL_RGB_INTEGER,     false, compilePS(device, g_PS_PassthroughRGB3DUI,    "Blit11 3D RGB UI pixel shader"         ));
      add3DShaderToMap(GL_RGB_INTEGER,     true,  compilePS(device, g_PS_PassthroughRGB3DI,     "Blit11 3D RGB I pixel shader"          ));
      add3DShaderToMap(GL_RG,              false, compilePS(device, g_PS_PassthroughRG3D,       "Blit11 3D RG pixel shader"             ));
      add3DShaderToMap(GL_RG_INTEGER,      false, compilePS(device, g_PS_PassthroughRG3DUI,     "Blit11 3D RG UI pixel shader"          ));
      add3DShaderToMap(GL_RG_INTEGER,      true,  compilePS(device, g_PS_PassthroughRG3DI,      "Blit11 3D RG I pixel shader"           ));
      add3DShaderToMap(GL_RED,             false, compilePS(device, g_PS_PassthroughR3D,        "Blit11 3D R pixel shader"              ));
      add3DShaderToMap(GL_RED_INTEGER,     false, compilePS(device, g_PS_PassthroughR3DUI,      "Blit11 3D R UI pixel shader"           ));
      add3DShaderToMap(GL_RED_INTEGER,     true,  compilePS(device, g_PS_PassthroughR3DI,       "Blit11 3D R I pixel shader"            ));
      add3DShaderToMap(GL_ALPHA,           false, compilePS(device, g_PS_PassthroughRGBA3D,     "Blit11 3D alpha pixel shader"          ));
      add3DShaderToMap(GL_LUMINANCE,       false, compilePS(device, g_PS_PassthroughLum3D,      "Blit11 3D luminance pixel shader"      ));
      add3DShaderToMap(GL_LUMINANCE_ALPHA, false, compilePS(device, g_PS_PassthroughLumAlpha3D, "Blit11 3D luminance alpha pixel shader"));
  }
  
  void Blit11::clearShaderMap()
  {
      for (BlitShaderMap::iterator i = mShaderMap.begin(); i != mShaderMap.end(); ++i)
      {
          BlitShader &shader = i->second;
          SafeRelease(shader.mPixelShader);
      }
      mShaderMap.clear();
  }
  
  }
  

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