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

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• Hash : 133a2ecb
  Author :
  Date : 2016-11-17T16:28:03
  

  Implement CHROMIUM_copy_texture for OpenGL.
  
  This also makes BlitGL work correctly on OpenGL ES (provided vertex
  arrays are available)
  
  BUG=angleproject:1356
  
  Change-Id: Icb7cef35bebfe6672220aa0b312ab89187dbf585
  Reviewed-on: https://chromium-review.googlesource.com/412452
  Commit-Queue: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/gl/TextureGL.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.
  //
  
  // TextureGL.h: Defines the class interface for TextureGL.
  
  #ifndef LIBANGLE_RENDERER_GL_TEXTUREGL_H_
  #define LIBANGLE_RENDERER_GL_TEXTUREGL_H_
  
  #include "libANGLE/angletypes.h"
  #include "libANGLE/renderer/TextureImpl.h"
  #include "libANGLE/Texture.h"
  
  namespace rx
  {
  
  class BlitGL;
  class FunctionsGL;
  class StateManagerGL;
  struct WorkaroundsGL;
  
  struct LUMAWorkaroundGL
  {
      bool enabled;
      GLenum workaroundFormat;
  
      LUMAWorkaroundGL();
      LUMAWorkaroundGL(bool enabled, GLenum workaroundFormat);
  };
  
  // Structure containing information about format and workarounds for each mip level of the
  // TextureGL.
  struct LevelInfoGL
  {
      // Format of the data used in this mip level.
      GLenum sourceFormat;
  
      // If this mip level requires sampler-state re-writing so that only a red channel is exposed.
      bool depthStencilWorkaround;
  
      // Information about luminance alpha texture workarounds in the core profile.
      LUMAWorkaroundGL lumaWorkaround;
  
      LevelInfoGL();
      LevelInfoGL(GLenum sourceFormat,
                  bool depthStencilWorkaround,
                  const LUMAWorkaroundGL &lumaWorkaround);
  };
  
  class TextureGL : public TextureImpl
  {
    public:
      TextureGL(const gl::TextureState &state,
                const FunctionsGL *functions,
                const WorkaroundsGL &workarounds,
                StateManagerGL *stateManager,
                BlitGL *blitter);
      ~TextureGL() override;
  
      gl::Error setImage(GLenum target, size_t level, GLenum internalFormat, const gl::Extents &size, GLenum format, GLenum type,
                         const gl::PixelUnpackState &unpack, const uint8_t *pixels) override;
      gl::Error setSubImage(GLenum target, size_t level, const gl::Box &area, GLenum format, GLenum type,
                            const gl::PixelUnpackState &unpack, const uint8_t *pixels) override;
  
      gl::Error setCompressedImage(GLenum target, size_t level, GLenum internalFormat, const gl::Extents &size,
                                   const gl::PixelUnpackState &unpack, size_t imageSize, const uint8_t *pixels) override;
      gl::Error setCompressedSubImage(GLenum target, size_t level, const gl::Box &area, GLenum format,
                                      const gl::PixelUnpackState &unpack, size_t imageSize, const uint8_t *pixels) override;
  
      gl::Error copyImage(GLenum target, size_t level, const gl::Rectangle &sourceArea, GLenum internalFormat,
                          const gl::Framebuffer *source) override;
      gl::Error copySubImage(GLenum target, size_t level, const gl::Offset &destOffset, const gl::Rectangle &sourceArea,
                             const gl::Framebuffer *source) override;
  
      gl::Error copyTexture(GLenum internalFormat,
                            GLenum type,
                            bool unpackFlipY,
                            bool unpackPremultiplyAlpha,
                            bool unpackUnmultiplyAlpha,
                            const gl::Texture *source) override;
      gl::Error copySubTexture(const gl::Offset &destOffset,
                               const gl::Rectangle &sourceArea,
                               bool unpackFlipY,
                               bool unpackPremultiplyAlpha,
                               bool unpackUnmultiplyAlpha,
                               const gl::Texture *source) override;
      gl::Error copySubTextureHelper(const gl::Offset &destOffset,
                                     const gl::Rectangle &sourceArea,
                                     GLenum destFormat,
                                     bool unpackFlipY,
                                     bool unpackPremultiplyAlpha,
                                     bool unpackUnmultiplyAlpha,
                                     const gl::Texture *source);
  
      gl::Error setStorage(GLenum target, size_t levels, GLenum internalFormat, const gl::Extents &size) override;
  
      gl::Error setImageExternal(GLenum target,
                                 egl::Stream *stream,
                                 const egl::Stream::GLTextureDescription &desc) override;
  
      gl::Error generateMipmap() override;
  
      void bindTexImage(egl::Surface *surface) override;
      void releaseTexImage() override;
  
      gl::Error setEGLImageTarget(GLenum target, egl::Image *image) override;
  
      GLuint getTextureID() const;
      GLenum getTarget() const;
  
      void setBaseLevel(GLuint) override {}
  
      void syncState(const gl::Texture::DirtyBits &dirtyBits) override;
      bool hasAnyDirtyBit() const;
  
      void setMinFilter(GLenum filter);
      void setMagFilter(GLenum filter);
  
      void setSwizzle(GLint swizzle[4]);
  
    private:
      void setImageHelper(GLenum target,
                          size_t level,
                          GLenum internalFormat,
                          const gl::Extents &size,
                          GLenum format,
                          GLenum type,
                          const uint8_t *pixels);
      // This changes the current pixel unpack state that will have to be reapplied.
      void reserveTexImageToBeFilled(GLenum target,
                                     size_t level,
                                     GLenum internalFormat,
                                     const gl::Extents &size,
                                     GLenum format,
                                     GLenum type);
      gl::Error setSubImageRowByRowWorkaround(GLenum target,
                                              size_t level,
                                              const gl::Box &area,
                                              GLenum format,
                                              GLenum type,
                                              const gl::PixelUnpackState &unpack,
                                              const uint8_t *pixels);
  
      gl::Error setSubImagePaddingWorkaround(GLenum target,
                                             size_t level,
                                             const gl::Box &area,
                                             GLenum format,
                                             GLenum type,
                                             const gl::PixelUnpackState &unpack,
                                             const uint8_t *pixels);
  
      void syncTextureStateSwizzle(const FunctionsGL *functions,
                                   GLenum name,
                                   GLenum value,
                                   GLenum *outValue);
  
      void setLevelInfo(size_t level, size_t levelCount, const LevelInfoGL &levelInfo);
  
      const FunctionsGL *mFunctions;
      const WorkaroundsGL &mWorkarounds;
      StateManagerGL *mStateManager;
      BlitGL *mBlitter;
  
      std::vector<LevelInfoGL> mLevelInfo;
      gl::Texture::DirtyBits mLocalDirtyBits;
  
      gl::SwizzleState mAppliedSwizzle;
      gl::SamplerState mAppliedSampler;
      GLuint mAppliedBaseLevel;
      GLuint mAppliedMaxLevel;
  
      GLuint mTextureID;
  };
  
  }
  
  #endif // LIBANGLE_RENDERER_GL_TEXTUREGL_H_
  

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