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

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• Author : Jamie Madill
  Date : 2015-04-14 08:13:47
  Hash : 79481d65
  Message : Add FramebufferAttachmentObject base class. This lets us share objects (Textures/RBs/Surface) in the attachment class. It will let us squash the attachment classes into one type, which will in turn let us store them by-value, instead of by-pointer. BUG=angleproject:963 Change-Id: Ia9a43dbc3b99475c00f6bc2ed5475deef55addc3 Reviewed-on: https://chromium-review.googlesource.com/263487 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>

• src/libANGLE/Texture.h

• //
  // Copyright (c) 2002-2013 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.
  //
  
  // Texture.h: Defines the gl::Texture class [OpenGL ES 2.0.24] section 3.7 page 63.
  
  #ifndef LIBANGLE_TEXTURE_H_
  #define LIBANGLE_TEXTURE_H_
  
  #include <vector>
  #include <map>
  
  #include "angle_gl.h"
  #include "common/debug.h"
  #include "libANGLE/Caps.h"
  #include "libANGLE/Constants.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/FramebufferAttachment.h"
  #include "libANGLE/angletypes.h"
  
  namespace egl
  {
  class Surface;
  }
  
  namespace rx
  {
  class TextureImpl;
  }
  
  namespace gl
  {
  class Framebuffer;
  struct Data;
  
  bool IsMipmapFiltered(const gl::SamplerState &samplerState);
  
  class Texture final : public FramebufferAttachmentObject
  {
    public:
      Texture(rx::TextureImpl *impl, GLuint id, GLenum target);
  
      virtual ~Texture();
  
      GLenum getTarget() const;
  
      const SamplerState &getSamplerState() const { return mSamplerState; }
      SamplerState &getSamplerState() { return mSamplerState; }
  
      void setUsage(GLenum usage);
      GLenum getUsage() const;
  
      size_t getWidth(GLenum target, size_t level) const;
      size_t getHeight(GLenum target, size_t level) const;
      size_t getDepth(GLenum target, size_t level) const;
      GLenum getInternalFormat(GLenum target, size_t level) const;
  
      bool isSamplerComplete(const SamplerState &samplerState, const Data &data) const;
      bool isCubeComplete() const;
  
      virtual Error setImage(GLenum target, size_t level, GLenum internalFormat, const Extents &size, GLenum format, GLenum type,
                             const PixelUnpackState &unpack, const uint8_t *pixels);
      virtual Error setSubImage(GLenum target, size_t level, const Box &area, GLenum format, GLenum type,
                                const PixelUnpackState &unpack, const uint8_t *pixels);
  
      virtual Error setCompressedImage(GLenum target, size_t level, GLenum internalFormat, const Extents &size,
                                       const PixelUnpackState &unpack, const uint8_t *pixels);
      virtual Error setCompressedSubImage(GLenum target, size_t level, const Box &area, GLenum format,
                                          const PixelUnpackState &unpack, const uint8_t *pixels);
  
      virtual Error copyImage(GLenum target, size_t level, const Rectangle &sourceArea, GLenum internalFormat,
                              const Framebuffer *source);
      virtual Error copySubImage(GLenum target, size_t level, const Offset &destOffset, const Rectangle &sourceArea,
                                const Framebuffer *source);
  
      virtual Error setStorage(GLenum target, size_t levels, GLenum internalFormat, const Extents &size);
  
      virtual Error generateMipmaps();
  
      // Texture serials provide a unique way of identifying a Texture that isn't a raw pointer.
      // "id" is not good enough, as Textures can be deleted, then re-allocated with the same id.
      unsigned int getTextureSerial() const;
  
      bool isImmutable() const;
      GLsizei immutableLevelCount();
  
      void bindTexImage(egl::Surface *surface);
      void releaseTexImage();
  
      rx::TextureImpl *getImplementation() { return mTexture; }
      const rx::TextureImpl *getImplementation() const { return mTexture; }
  
      static const GLuint INCOMPLETE_TEXTURE_ID = static_cast<GLuint>(-1);   // Every texture takes an id at creation time. The value is arbitrary because it is never registered with the resource manager.
  
      // FramebufferAttachmentObject implementation
      GLsizei getAttachmentWidth(const FramebufferAttachment::Target &target) const override;
      GLsizei getAttachmentHeight(const FramebufferAttachment::Target &target) const override;
      GLenum getAttachmentInternalFormat(const FramebufferAttachment::Target &target) const override;
      GLsizei getAttachmentSamples(const FramebufferAttachment::Target &target) const override;
  
    private:
      static unsigned int issueTextureSerial();
  
      rx::TextureImpl *mTexture;
  
      SamplerState mSamplerState;
      GLenum mUsage;
  
      GLsizei mImmutableLevelCount;
  
      GLenum mTarget;
  
  
      struct ImageDesc
      {
          Extents size;
          GLenum internalFormat;
  
          ImageDesc();
          ImageDesc(const Extents &size, GLenum internalFormat);
      };
  
      const unsigned int mTextureSerial;
      static unsigned int mCurrentTextureSerial;
  
      GLenum getBaseImageTarget() const;
      size_t getExpectedMipLevels() const;
  
      bool computeSamplerCompleteness(const SamplerState &samplerState, const Data &data) const;
      bool computeMipmapCompleteness(const gl::SamplerState &samplerState) const;
      bool computeLevelCompleteness(GLenum target, size_t level, const gl::SamplerState &samplerState) const;
  
      const ImageDesc &getImageDesc(GLenum target, size_t level) const;
      void setImageDesc(GLenum target, size_t level, const ImageDesc &desc);
      void setImageDescChain(size_t levels, Extents baseSize, GLenum sizedInternalFormat);
      void clearImageDesc(GLenum target, size_t level);
      void clearImageDescs();
  
      std::vector<ImageDesc> mImageDescs;
  
      struct SamplerCompletenessCache
      {
          SamplerCompletenessCache();
  
          bool cacheValid;
  
          // All values that affect sampler completeness that are not stored within
          // the texture itself
          SamplerState samplerState;
          bool filterable;
          GLint clientVersion;
          bool supportsNPOT;
  
          // Result of the sampler completeness with the above parameters
          bool samplerComplete;
      };
      mutable SamplerCompletenessCache mCompletenessCache;
  
      egl::Surface *mBoundSurface;
  };
  
  }
  
  #endif   // LIBANGLE_TEXTURE_H_