kc3-lang/angle/src/libANGLE/renderer/d3d/d3d11/StreamProducerD3DTexture.cpp

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• Hash : ff32734d
  Author :
  Date : 2018-02-22T18:20:37
  

  Support EGLStream from B8G8R8A8_UNORM D3D11Texture.
  
  Mozilla bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1415754
  
  BUG=angleproject:2368
  
  Change-Id: Ic2c71b36e7b08560e158fd3dbf10b2fe225f1364
  Reviewed-on: https://chromium-review.googlesource.com/935148
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d11/StreamProducerD3DTexture.cpp

• //
  // Copyright (c) 2016 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.
  //
  
  // StreamProducerD3DTexture.cpp: Implements the stream producer for D3D11 textures
  
  #include "libANGLE/renderer/d3d/d3d11/StreamProducerD3DTexture.h"
  
  #include "common/utilities.h"
  #include "libANGLE/renderer/d3d/d3d11/Renderer11.h"
  #include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h"
  
  namespace rx
  {
  
  namespace
  {
  
  egl::Error GetGLDescFromTex(ID3D11Texture2D *const tex,
                              const UINT planeIndex,
                              egl::Stream::GLTextureDescription *const out)
  {
      if (!tex)
          return egl::EglBadParameter() << "Texture is null";
  
      D3D11_TEXTURE2D_DESC desc;
      tex->GetDesc(&desc);
  
      if (desc.Width < 1 || desc.Height < 1)
          return egl::EglBadParameter() << "Width or height < 1";
  
      out->width     = desc.Width;
      out->height    = desc.Height;
      out->mipLevels = 0;
  
      UINT maxPlaneIndex = 0;
      switch (desc.Format)
      {
          case DXGI_FORMAT_NV12:
              // The UV plane of NV12 textures has half the width/height of the Y plane
              if ((desc.Width % 2) != 0 || (desc.Height % 2) != 0)
                  return egl::EglBadParameter() << "NV12 tetxures must have even width and height.";
  
              maxPlaneIndex = 1;
              if (planeIndex == 0)
              {
                  out->internalFormat = GL_R8;
              }
              else
              {
                  out->internalFormat = GL_RG8;
                  out->width /= 2;
                  out->height /= 2;
              }
              break;
  
          case DXGI_FORMAT_R8_UNORM:
              out->internalFormat = GL_R8;
              break;
          case DXGI_FORMAT_R8G8_UNORM:
              out->internalFormat = GL_RG8;
              break;
          case DXGI_FORMAT_R8G8B8A8_UNORM:
              out->internalFormat = GL_RGBA8;
              break;
          case DXGI_FORMAT_B8G8R8A8_UNORM:
              out->internalFormat = GL_BGRA8_EXT;
              break;
  
          default:
              return egl::EglBadParameter() << "Unsupported format";
      }
  
      if (planeIndex > maxPlaneIndex)  // Just kidding, there's no plane out there.
          return egl::EglBadParameter() << "Plane out of range";
  
      return egl::NoError();
  }
  
  }  // namespace
  
  StreamProducerD3DTexture::StreamProducerD3DTexture(Renderer11 *renderer)
      : mRenderer(renderer), mTexture(nullptr), mArraySlice(0), mPlaneOffset(0)
  {
  }
  
  StreamProducerD3DTexture::~StreamProducerD3DTexture()
  {
      SafeRelease(mTexture);
  }
  
  egl::Error StreamProducerD3DTexture::validateD3DTexture(void *pointer,
                                                          const egl::AttributeMap &attributes) const
  {
      ID3D11Texture2D *textureD3D = static_cast<ID3D11Texture2D *>(pointer);
  
      // Check that the texture originated from our device
      ID3D11Device *device;
      textureD3D->GetDevice(&device);
      if (device != mRenderer->getDevice())
      {
          return egl::EglBadParameter() << "Texture not created on ANGLE D3D device";
      }
  
      const auto planeId = static_cast<UINT>(attributes.get(EGL_NATIVE_BUFFER_PLANE_OFFSET_IMG, 0));
      egl::Stream::GLTextureDescription unused;
      return GetGLDescFromTex(textureD3D, planeId, &unused);
  }
  
  void StreamProducerD3DTexture::postD3DTexture(void *pointer, const egl::AttributeMap &attributes)
  {
      ASSERT(pointer != nullptr);
      ID3D11Texture2D *textureD3D = static_cast<ID3D11Texture2D *>(pointer);
  
      // Release the previous texture if there is one
      SafeRelease(mTexture);
  
      mTexture = textureD3D;
      mTexture->AddRef();
      mPlaneOffset = static_cast<UINT>(attributes.get(EGL_NATIVE_BUFFER_PLANE_OFFSET_IMG, 0));
      mArraySlice  = static_cast<UINT>(attributes.get(EGL_D3D_TEXTURE_SUBRESOURCE_ID_ANGLE, 0));
  }
  
  egl::Stream::GLTextureDescription StreamProducerD3DTexture::getGLFrameDescription(int planeIndex)
  {
      const auto planeOffsetIndex = static_cast<UINT>(planeIndex + mPlaneOffset);
      egl::Stream::GLTextureDescription ret;
      ANGLE_SWALLOW_ERR(GetGLDescFromTex(mTexture, planeOffsetIndex, &ret));
      return ret;
  }
  
  ID3D11Texture2D *StreamProducerD3DTexture::getD3DTexture()
  {
      return mTexture;
  }
  
  UINT StreamProducerD3DTexture::getArraySlice()
  {
      return mArraySlice;
  }
  
  }  // namespace rx
  

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