kc3-lang/angle/src/libANGLE/renderer/gl/BlitGL.h

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• Hash : aadc8f37
  Author :
  Date : 2017-08-11T17:34:44
  

  Implement the CPU fallback for CopyTextureCHROMIUM on OpenGL.
  
  BUG=angleproject:1932
  
  Change-Id: Iabc1a3e361d66313dc16bf19b392402b7836f8a5
  Reviewed-on: https://chromium-review.googlesource.com/612562
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

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• src/libANGLE/renderer/gl/BlitGL.h

• //
  // Copyright 2015 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.
  //
  
  // BlitGL.h: Defines the BlitGL class, a helper for blitting textures
  
  #ifndef LIBANGLE_RENDERER_GL_BLITGL_H_
  #define LIBANGLE_RENDERER_GL_BLITGL_H_
  
  #include "angle_gl.h"
  #include "common/angleutils.h"
  #include "libANGLE/angletypes.h"
  #include "libANGLE/Error.h"
  
  #include <map>
  
  namespace gl
  {
  class Framebuffer;
  }
  
  namespace rx
  {
  
  class FramebufferGL;
  class FunctionsGL;
  class StateManagerGL;
  class TextureGL;
  struct WorkaroundsGL;
  
  class BlitGL : angle::NonCopyable
  {
    public:
      BlitGL(const FunctionsGL *functions,
             const WorkaroundsGL &workarounds,
             StateManagerGL *stateManager);
      ~BlitGL();
  
      gl::Error copyImageToLUMAWorkaroundTexture(const gl::Context *context,
                                                 GLuint texture,
                                                 GLenum textureType,
                                                 GLenum target,
                                                 GLenum lumaFormat,
                                                 size_t level,
                                                 const gl::Rectangle &sourceArea,
                                                 GLenum internalFormat,
                                                 const gl::Framebuffer *source);
  
      gl::Error copySubImageToLUMAWorkaroundTexture(const gl::Context *context,
                                                    GLuint texture,
                                                    GLenum textureType,
                                                    GLenum target,
                                                    GLenum lumaFormat,
                                                    size_t level,
                                                    const gl::Offset &destOffset,
                                                    const gl::Rectangle &sourceArea,
                                                    const gl::Framebuffer *source);
  
      gl::Error blitColorBufferWithShader(const gl::Framebuffer *source,
                                          const gl::Framebuffer *dest,
                                          const gl::Rectangle &sourceArea,
                                          const gl::Rectangle &destArea,
                                          GLenum filter);
  
      gl::Error copySubTexture(const gl::Context *context,
                               TextureGL *source,
                               size_t sourceLevel,
                               GLenum sourceComponentType,
                               TextureGL *dest,
                               GLenum destTarget,
                               size_t destLevel,
                               GLenum destComponentType,
                               const gl::Extents &sourceSize,
                               const gl::Rectangle &sourceArea,
                               const gl::Offset &destOffset,
                               bool needsLumaWorkaround,
                               GLenum lumaFormat,
                               bool unpackFlipY,
                               bool unpackPremultiplyAlpha,
                               bool unpackUnmultiplyAlpha);
  
      gl::Error copySubTextureCPUReadback(const gl::Context *context,
                                          TextureGL *source,
                                          size_t sourceLevel,
                                          GLenum sourceComponentType,
                                          TextureGL *dest,
                                          GLenum destTarget,
                                          size_t destLevel,
                                          GLenum destFormat,
                                          GLenum destType,
                                          const gl::Rectangle &sourceArea,
                                          const gl::Offset &destOffset,
                                          bool unpackFlipY,
                                          bool unpackPremultiplyAlpha,
                                          bool unpackUnmultiplyAlpha);
  
      gl::Error copyTexSubImage(TextureGL *source,
                                size_t sourceLevel,
                                TextureGL *dest,
                                GLenum destTarget,
                                size_t destLevel,
                                const gl::Rectangle &sourceArea,
                                const gl::Offset &destOffset);
  
      gl::Error initializeResources();
  
    private:
      void orphanScratchTextures();
      void setScratchTextureParameter(GLenum param, GLenum value);
  
      const FunctionsGL *mFunctions;
      const WorkaroundsGL &mWorkarounds;
      StateManagerGL *mStateManager;
  
      struct BlitProgram
      {
          GLuint program                = 0;
          GLint sourceTextureLocation   = -1;
          GLint scaleLocation           = -1;
          GLint offsetLocation          = -1;
          GLint multiplyAlphaLocation   = -1;
          GLint unMultiplyAlphaLocation = -1;
      };
  
      enum class BlitProgramType
      {
          FLOAT_TO_FLOAT,
          FLOAT_TO_UINT,
          UINT_TO_UINT,
      };
  
      static BlitProgramType getBlitProgramType(GLenum sourceComponentType, GLenum destComponentType);
      gl::Error getBlitProgram(BlitProgramType type, BlitProgram **program);
  
      std::map<BlitProgramType, BlitProgram> mBlitPrograms;
  
      GLuint mScratchTextures[2];
      GLuint mScratchFBO;
  
      GLuint mVAO;
      GLuint mVertexBuffer;
  };
  }
  
  #endif  // LIBANGLE_RENDERER_GL_BLITGL_H_
  

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