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

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• Hash : 18c6d628
  Author :
  Date : 2021-03-09T13:46:13
  

  GL: Support VAOs without native VAOs.
  
  Share the default VAO state between all frontend VAO when
  there is no native VAO support. Forcefully sync state every
  time a new frontend VAO is bound.
  
  Bug: angleproject:5577, chromium:1167179
  Change-Id: Ieaedb5108ad28fc78e7e58b74495639c5246bb05
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2665266
  Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
  Reviewed-by: Peng Huang <penghuang@chromium.org>
  Commit-Queue: Geoff Lang <geofflang@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/Error.h"
  #include "libANGLE/angletypes.h"
  #include "libANGLE/renderer/gl/formatutilsgl.h"
  
  #include <map>
  
  namespace angle
  {
  struct FeaturesGL;
  }  // namespace angle
  
  namespace gl
  {
  class Framebuffer;
  class ImageIndex;
  }  // namespace gl
  
  namespace rx
  {
  
  class FramebufferGL;
  class FunctionsGL;
  class RenderbufferGL;
  class StateManagerGL;
  class TextureGL;
  struct VertexArrayStateGL;
  
  class BlitGL : angle::NonCopyable
  {
    public:
      BlitGL(const FunctionsGL *functions,
             const angle::FeaturesGL &features,
             StateManagerGL *stateManager);
      ~BlitGL();
  
      angle::Result 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);
  
      angle::Result 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);
  
      angle::Result blitColorBufferWithShader(const gl::Context *context,
                                              const gl::Framebuffer *source,
                                              const gl::Framebuffer *dest,
                                              const gl::Rectangle &sourceArea,
                                              const gl::Rectangle &destArea,
                                              GLenum filter,
                                              bool writeAlpha);
  
      angle::Result blitColorBufferWithShader(const gl::Context *context,
                                              const gl::Framebuffer *source,
                                              const GLuint destFramebuffer,
                                              const gl::Rectangle &sourceArea,
                                              const gl::Rectangle &destArea,
                                              GLenum filter,
                                              bool writeAlpha);
  
      angle::Result blitColorBufferWithShader(const gl::Context *context,
                                              const gl::Framebuffer *source,
                                              const GLuint destTexture,
                                              const gl::TextureTarget destTarget,
                                              const size_t destLevel,
                                              const gl::Rectangle &sourceArea,
                                              const gl::Rectangle &destArea,
                                              GLenum filter,
                                              bool writeAlpha);
  
      angle::Result copySubTexture(const gl::Context *context,
                                   TextureGL *source,
                                   size_t sourceLevel,
                                   GLenum sourceComponentType,
                                   GLuint destID,
                                   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,
                                   bool *copySucceededOut);
  
      angle::Result copySubTextureCPUReadback(const gl::Context *context,
                                              TextureGL *source,
                                              size_t sourceLevel,
                                              GLenum sourceSizedInternalFormat,
                                              TextureGL *dest,
                                              gl::TextureTarget destTarget,
                                              size_t destLevel,
                                              GLenum destFormat,
                                              GLenum destType,
                                              const gl::Extents &sourceSize,
                                              const gl::Rectangle &sourceArea,
                                              const gl::Offset &destOffset,
                                              bool needsLumaWorkaround,
                                              GLenum lumaFormat,
                                              bool unpackFlipY,
                                              bool unpackPremultiplyAlpha,
                                              bool unpackUnmultiplyAlpha);
  
      angle::Result copyTexSubImage(const gl::Context *context,
                                    TextureGL *source,
                                    size_t sourceLevel,
                                    TextureGL *dest,
                                    gl::TextureTarget destTarget,
                                    size_t destLevel,
                                    const gl::Rectangle &sourceArea,
                                    const gl::Offset &destOffset,
                                    bool *copySucceededOut);
  
      angle::Result clearRenderableTexture(const gl::Context *context,
                                           TextureGL *source,
                                           GLenum sizedInternalFormat,
                                           int numTextureLayers,
                                           const gl::ImageIndex &imageIndex,
                                           bool *clearSucceededOut);
  
      angle::Result clearRenderbuffer(const gl::Context *context,
                                      RenderbufferGL *source,
                                      GLenum sizedInternalFormat);
  
      angle::Result clearFramebuffer(const gl::Context *context, FramebufferGL *source);
  
      angle::Result clearRenderableTextureAlphaToOne(const gl::Context *context,
                                                     GLuint texture,
                                                     gl::TextureTarget target,
                                                     size_t level);
  
      angle::Result generateSRGBMipmap(const gl::Context *context,
                                       TextureGL *source,
                                       GLuint baseLevel,
                                       GLuint levelCount,
                                       const gl::Extents &sourceBaseLevelSize);
  
      angle::Result initializeResources(const gl::Context *context);
  
    private:
      angle::Result orphanScratchTextures(const gl::Context *context);
      angle::Result setScratchTextureParameter(const gl::Context *context,
                                               GLenum param,
                                               GLenum value);
      angle::Result setVAOState(const gl::Context *context);
      angle::Result initializeVAOState(const gl::Context *context);
  
      const FunctionsGL *mFunctions;
      const angle::FeaturesGL &mFeatures;
      StateManagerGL *mStateManager;
  
      struct BlitProgram
      {
          GLuint program                = 0;
          GLint sourceTextureLocation   = -1;
          GLint scaleLocation           = -1;
          GLint offsetLocation          = -1;
          GLint multiplyAlphaLocation   = -1;
          GLint unMultiplyAlphaLocation = -1;
      };
  
      angle::Result getBlitProgram(const gl::Context *context,
                                   gl::TextureType sourceTextureType,
                                   GLenum sourceComponentType,
                                   GLenum destComponentType,
                                   BlitProgram **program);
  
      bool mResourcesInitialized = false;
  
      // SourceType, SourceComponentType, DestComponentType
      using BlitProgramType = std::tuple<gl::TextureType, GLenum, GLenum>;
      std::map<BlitProgramType, BlitProgram> mBlitPrograms;
  
      GLuint mScratchTextures[2] = {0};
      GLuint mScratchFBO         = 0;
  
      GLuint mVAO                   = 0;
      VertexArrayStateGL *mVAOState = nullptr;
      bool mOwnsVAOState            = false;
  
      const GLuint mTexcoordAttribLocation = 0;
      GLuint mVertexBuffer                 = 0;
  
      nativegl::TexImageFormat mSRGBMipmapGenerationFormat;
  };
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_GL_BLITGL_H_
  

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