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

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• Hash : cc129377
  Author :
  Date : 2018-04-12T09:13:18
  

  ImageIndex: Consolidate layer/cube face.
  
  In terms of the Texture or Image resource, a cube face
  refers to a layer of a 2D texture. This layer has a special
  meaning for cube textures, but it is represented as a layer
  with a layer index. Cube array textures are no different,
  they just use a different indexing scheme for the array
  layers.
  
  This also cleans up the ImageIndex helper to have a class
  structure with private data, and cleans up a few cases to
  use generic Make functions and iterators where they were
  setting properties of the index directly.
  
  This will make it easier to have ImageIndexes address
  entire levels of a Cube map in the future, and makes the
  layer count logic in Vulkan cleaner.
  
  Bug: angleproject:2318
  Change-Id: Iea9842e233f974a9896282ca224cb001f7882bd1
  Reviewed-on: https://chromium-review.googlesource.com/987525
  Reviewed-by: Luc Ferron <lucferron@chromium.org>
  Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@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;
  class ImageIndex;
  }
  
  namespace rx
  {
  
  class FramebufferGL;
  class FunctionsGL;
  class RenderbufferGL;
  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,
                                                 gl::TextureType textureType,
                                                 gl::TextureTarget target,
                                                 GLenum lumaFormat,
                                                 size_t level,
                                                 const gl::Rectangle &sourceArea,
                                                 GLenum internalFormat,
                                                 gl::Framebuffer *source);
  
      gl::Error copySubImageToLUMAWorkaroundTexture(const gl::Context *context,
                                                    GLuint texture,
                                                    gl::TextureType textureType,
                                                    gl::TextureTarget target,
                                                    GLenum lumaFormat,
                                                    size_t level,
                                                    const gl::Offset &destOffset,
                                                    const gl::Rectangle &sourceArea,
                                                    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::ErrorOrResult<bool> copySubTexture(const gl::Context *context,
                                             TextureGL *source,
                                             size_t sourceLevel,
                                             GLenum sourceComponentType,
                                             TextureGL *dest,
                                             gl::TextureTarget 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,
                                          gl::TextureTarget destTarget,
                                          size_t destLevel,
                                          GLenum destFormat,
                                          GLenum destType,
                                          const gl::Rectangle &sourceArea,
                                          const gl::Offset &destOffset,
                                          bool unpackFlipY,
                                          bool unpackPremultiplyAlpha,
                                          bool unpackUnmultiplyAlpha);
  
      gl::ErrorOrResult<bool> copyTexSubImage(TextureGL *source,
                                              size_t sourceLevel,
                                              TextureGL *dest,
                                              gl::TextureTarget destTarget,
                                              size_t destLevel,
                                              const gl::Rectangle &sourceArea,
                                              const gl::Offset &destOffset);
  
      gl::ErrorOrResult<bool> clearRenderableTexture(TextureGL *source,
                                                     GLenum sizedInternalFormat,
                                                     int numTextureLayers,
                                                     const gl::ImageIndex &imageIndex);
  
      gl::Error clearRenderbuffer(RenderbufferGL *source, GLenum sizedInternalFormat);
  
      gl::Error clearFramebuffer(FramebufferGL *source);
  
      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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