kc3-lang/angle/src/libANGLE/renderer/d3d/d3d11/ExternalImageSiblingImpl11.h

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• Hash : c1af9abf
  Author :
  Date : 2019-08-28T14:35:32
  

  Add support for overriding internal format for D3D11 texture EGLImages
  
  Add an optional EGL_D3D11_TEXTURE_FORMAT_ANGLE attribute that is the
  GL internal format to use for EGLImage being created.  This will be used
  for RGB emulation of swap chain texture backed WebGL contexts in Chrome
  when they have alpha:false set.  Without RGB emulation it is possible to
  observe side-effects of the underlying swap chain being RGBA such as
  reading/writing the alpha channel, BlitFramebuffer working/not working
  when expected, etc.
  
  Also document creating EGLImages from D3D11 textures in the existing
  EGL_ANGLE_d3d_texture_client_buffer extension along with RGB emulation.
  
  Bug: chromium:699566, chromium:939657
  Change-Id: I4931cb7bdc46e9bc6debd56b79ecc10ea27bd78b
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1777099
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d11/ExternalImageSiblingImpl11.h

• //
  // Copyright 2019 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.
  //
  
  #ifndef LIBANGLE_RENDERER_D3D_D3D11_EXTERNALIMAGESIBLINGIMPL11_H_
  #define LIBANGLE_RENDERER_D3D_D3D11_EXTERNALIMAGESIBLINGIMPL11_H_
  
  #include "libANGLE/renderer/ImageImpl.h"
  #include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h"
  
  namespace rx
  {
  
  class Renderer11;
  class RenderTargetD3D;
  
  class ExternalImageSiblingImpl11 : public ExternalImageSiblingImpl
  {
    public:
      ExternalImageSiblingImpl11(Renderer11 *renderer,
                                 EGLClientBuffer clientBuffer,
                                 const egl::AttributeMap &attribs);
      ~ExternalImageSiblingImpl11() override;
  
      // ExternalImageSiblingImpl interface
      egl::Error initialize(const egl::Display *display) override;
      gl::Format getFormat() const override;
      bool isRenderable(const gl::Context *context) const override;
      bool isTexturable(const gl::Context *context) const override;
      gl::Extents getSize() const override;
      size_t getSamples() const override;
  
      // FramebufferAttachmentObjectImpl interface
      angle::Result getAttachmentRenderTarget(const gl::Context *context,
                                              GLenum binding,
                                              const gl::ImageIndex &imageIndex,
                                              GLsizei samples,
                                              FramebufferAttachmentRenderTarget **rtOut) override;
      angle::Result initializeContents(const gl::Context *context,
                                       const gl::ImageIndex &imageIndex) override;
  
    private:
      angle::Result createRenderTarget(const gl::Context *context);
  
      Renderer11 *mRenderer;
      EGLClientBuffer mBuffer;
      egl::AttributeMap mAttribs;
  
      TextureHelper11 mTexture;
  
      gl::Format mFormat = gl::Format::Invalid();
      bool mIsRenderable = false;
      bool mIsTexturable = false;
      EGLint mWidth      = 0;
      EGLint mHeight     = 0;
      GLsizei mSamples   = 0;
  
      std::unique_ptr<RenderTargetD3D> mRenderTarget;
  };
  
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_D3D_D3D11_EXTERNALIMAGESIBLINGIMPL11_H_
  

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