kc3-lang/angle/src/libANGLE/Renderbuffer.h

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• Hash : a8802477
  Author :
  Date : 2018-05-28T11:17:47
  

  ES31: Implement FramebufferTextureEXT on OpenGL back-ends
  
  This patch intends to implement FramebufferTextureEXT on OpenGL
  back-ends.
  1. Support layered framebuffer attachments.
  2. Add new framebuffer completeness rules on layered framebuffer
     attachments.
  3. Support FRAMEBUFFER_ATTACHMENT_LAYERED_EXT as a valid <pname>
     parameter of GetFramebufferAttachmentParameteriv.
  
  Note that for an entire level of a cube map:
  1. It has no TextureTarget because TEXTURE_CUBE is not a valid
     target for TexImage*D.
  2. It corresponds to 6 ImageDescs (that represents its faces) in
     class Texture, so when the cube map is cube complete, we return
     the ImageDesc of its first face, meanwhile we do not allow
     querying ImageDesc if it is not cube complete.
  
  BUG=angleproject:1941
  TEST=angle_end2end_tests
       dEQP-GLES31.functional.geometry_shading.query.framebuffer_attachment_layers
       dEQP-GLES31.functional.geometry_shading.query.framebuffer_incomplete_layer_targets
       dEQP-GLES31.functional.geometry_shading.layered.*
       dEQP-GLES31.functional.geometry_shading.instanced.invocation_per_layer_*
       dEQP-GLES31.functional.geometry_shading.instanced.multiple_layers_per_invocation_*
  
  Change-Id: I44393b513ec8f1a682fd1c47d3eaa6f3b3fae877
  Reviewed-on: https://chromium-review.googlesource.com/1075811
  Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

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• src/libANGLE/Renderbuffer.h

• //
  // Copyright (c) 2002-2010 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.
  //
  
  // Renderbuffer.h: Defines the renderer-agnostic container class gl::Renderbuffer.
  // Implements GL renderbuffer objects and related functionality.
  // [OpenGL ES 2.0.24] section 4.4.3 page 108.
  
  #ifndef LIBANGLE_RENDERBUFFER_H_
  #define LIBANGLE_RENDERBUFFER_H_
  
  #include "angle_gl.h"
  #include "common/angleutils.h"
  #include "libANGLE/Debug.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/FramebufferAttachment.h"
  #include "libANGLE/Image.h"
  #include "libANGLE/formatutils.h"
  #include "libANGLE/renderer/RenderbufferImpl.h"
  
  namespace rx
  {
  class GLImplFactory;
  }  // namespace rx
  
  namespace gl
  {
  // A GL renderbuffer object is usually used as a depth or stencil buffer attachment
  // for a framebuffer object. The renderbuffer itself is a distinct GL object, see
  // FramebufferAttachment and Framebuffer for how they are applied to an FBO via an
  // attachment point.
  
  class RenderbufferState final : angle::NonCopyable
  {
    public:
      RenderbufferState();
      ~RenderbufferState();
  
      GLsizei getWidth() const;
      GLsizei getHeight() const;
      const Format &getFormat() const;
      GLsizei getSamples() const;
  
    private:
      friend class Renderbuffer;
  
      void update(GLsizei width,
                  GLsizei height,
                  const Format &format,
                  GLsizei samples,
                  InitState initState);
  
      GLsizei mWidth;
      GLsizei mHeight;
      Format mFormat;
      GLsizei mSamples;
  
      // For robust resource init.
      InitState mInitState;
  };
  
  class Renderbuffer final : public egl::ImageSibling,
                             public LabeledObject
  {
    public:
      Renderbuffer(rx::GLImplFactory *implFactory, GLuint id);
      ~Renderbuffer() override;
  
      Error onDestroy(const Context *context) override;
  
      void setLabel(const std::string &label) override;
      const std::string &getLabel() const override;
  
      Error setStorage(const Context *context, GLenum internalformat, size_t width, size_t height);
      Error setStorageMultisample(const Context *context,
                                  size_t samples,
                                  GLenum internalformat,
                                  size_t width,
                                  size_t height);
      Error setStorageEGLImageTarget(const Context *context, egl::Image *imageTarget);
  
      rx::RenderbufferImpl *getImplementation() const;
  
      GLsizei getWidth() const;
      GLsizei getHeight() const;
      const Format &getFormat() const;
      GLsizei getSamples() const;
      GLuint getRedSize() const;
      GLuint getGreenSize() const;
      GLuint getBlueSize() const;
      GLuint getAlphaSize() const;
      GLuint getDepthSize() const;
      GLuint getStencilSize() const;
  
      // FramebufferAttachmentObject Impl
      Extents getAttachmentSize(const ImageIndex &imageIndex) const override;
      Format getAttachmentFormat(GLenum binding, const ImageIndex &imageIndex) const override;
      GLsizei getAttachmentSamples(const ImageIndex &imageIndex) const override;
  
      void onAttach(const Context *context) override;
      void onDetach(const Context *context) override;
      GLuint getId() const override;
  
      InitState initState(const ImageIndex &imageIndex) const override;
      void setInitState(const ImageIndex &imageIndex, InitState initState) override;
  
    private:
      rx::FramebufferAttachmentObjectImpl *getAttachmentImpl() const override;
  
      RenderbufferState mState;
      std::unique_ptr<rx::RenderbufferImpl> mImplementation;
  
      std::string mLabel;
  };
  
  }  // namespace gl
  
  #endif   // LIBANGLE_RENDERBUFFER_H_
  

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