kc3-lang/angle/src/libGLESv2/Texture.h

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• Hash : e2e9798b
  Author :
  Date : 2013-02-28T23:18:50
  

  Only discard the storage texture when there is a mismatch with its mipmap chain.
  
  TRAC #20587
  Signed-off-by: Geoff Lang
  Signed-off-by: Shannon Woods
  Author: Nicolas Capens
  
  git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1954 736b8ea6-26fd-11df-bfd4-992fa37f6226
  

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• src/libGLESv2/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 abstract gl::Texture class and its concrete derived
  // classes Texture2D and TextureCubeMap. Implements GL texture objects and
  // related functionality. [OpenGL ES 2.0.24] section 3.7 page 63.
  
  #ifndef LIBGLESV2_TEXTURE_H_
  #define LIBGLESV2_TEXTURE_H_
  
  #include <vector>
  
  #define GL_APICALL
  #include <GLES2/gl2.h>
  
  #include "common/debug.h"
  #include "common/RefCountObject.h"
  #include "libGLESv2/angletypes.h"
  
  namespace egl
  {
  class Surface;
  }
  
  namespace rx
  {
  class Renderer;
  class TextureStorageInterface;
  class TextureStorageInterface2D;
  class TextureStorageInterfaceCube;
  class RenderTarget;
  class Image;
  }
  
  namespace gl
  {
  class Framebuffer;
  class Renderbuffer;
  
  enum
  {
      // These are the maximums the implementation can support
      // The actual GL caps are limited by the device caps
      // and should be queried from the Context
      IMPLEMENTATION_MAX_TEXTURE_SIZE = 16384,
      IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE = 16384,
  
      IMPLEMENTATION_MAX_TEXTURE_LEVELS = 15   // 1+log2 of MAX_TEXTURE_SIZE
  };
  
  class Texture : public RefCountObject
  {
    public:
      Texture(rx::Renderer *renderer, GLuint id);
  
      virtual ~Texture();
  
      virtual void addProxyRef(const Renderbuffer *proxy) = 0;
      virtual void releaseProxy(const Renderbuffer *proxy) = 0;
  
      virtual GLenum getTarget() const = 0;
  
      bool setMinFilter(GLenum filter);
      bool setMagFilter(GLenum filter);
      bool setWrapS(GLenum wrap);
      bool setWrapT(GLenum wrap);
      bool setMaxAnisotropy(float textureMaxAnisotropy, float contextMaxAnisotropy);
      bool setUsage(GLenum usage);
  
      GLenum getMinFilter() const;
      GLenum getMagFilter() const;
      GLenum getWrapS() const;
      GLenum getWrapT() const;
      float getMaxAnisotropy() const;
      int getLodOffset();
      void getSamplerState(SamplerState *sampler);
      GLenum getUsage() const;
      bool isMipmapFiltered() const;
  
      virtual bool isSamplerComplete() const = 0;
  
      rx::TextureStorageInterface *getNativeTexture();
      virtual Renderbuffer *getRenderbuffer(GLenum target) = 0;
  
      virtual void generateMipmaps() = 0;
      virtual void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source) = 0;
  
      bool hasDirtyParameters() const;
      bool hasDirtyImages() const;
      void resetDirty();
      unsigned int getTextureSerial();
      unsigned int getRenderTargetSerial(GLenum target);
  
      bool isImmutable() const;
  
      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.
  
    protected:
      void setImage(GLint unpackAlignment, const void *pixels, rx::Image *image);
      bool subImage(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels, rx::Image *image);
      void setCompressedImage(GLsizei imageSize, const void *pixels, rx::Image *image);
      bool subImageCompressed(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels, rx::Image *image);
  
      GLint creationLevels(GLsizei width, GLsizei height) const;
      GLint creationLevels(GLsizei size) const;
  
      virtual void createTexture() = 0;
      virtual void updateTexture() = 0;
      virtual void convertToRenderTarget() = 0;
      virtual rx::RenderTarget *getRenderTarget(GLenum target) = 0;
  
      virtual int levelCount() = 0;
  
      rx::Renderer *mRenderer;
  
      SamplerState mSamplerState;
      GLenum mUsage;
  
      bool mDirtyImages;
  
      bool mImmutable;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Texture);
  
      virtual rx::TextureStorageInterface *getStorage(bool renderTarget) = 0;
  };
  
  class Texture2D : public Texture
  {
    public:
      Texture2D(rx::Renderer *renderer, GLuint id);
  
      ~Texture2D();
  
      void addProxyRef(const Renderbuffer *proxy);
      void releaseProxy(const Renderbuffer *proxy);
  
      virtual GLenum getTarget() const;
  
      GLsizei getWidth(GLint level) const;
      GLsizei getHeight(GLint level) const;
      GLenum getInternalFormat(GLint level) const;
      GLenum getActualFormat(GLint level) const;
      bool isCompressed(GLint level) const;
      bool isDepth(GLint level) const;
  
      void setImage(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setCompressedImage(GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei imageSize, const void *pixels);
      void subImage(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void subImageCompressed(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels);
      void copyImage(GLint level, GLenum format, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);
      virtual void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);
      void storage(GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height);
  
      virtual bool isSamplerComplete() const;
      virtual void bindTexImage(egl::Surface *surface);
      virtual void releaseTexImage();
  
      virtual void generateMipmaps();
  
      virtual Renderbuffer *getRenderbuffer(GLenum target);
  
    protected:
      friend class RenderbufferTexture2D;
      virtual rx::RenderTarget *getRenderTarget(GLenum target);
      virtual rx::RenderTarget *getDepthStencil(GLenum target);
      virtual int levelCount();
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Texture2D);
  
      virtual void createTexture();
      virtual void updateTexture();
      virtual void convertToRenderTarget();
      virtual rx::TextureStorageInterface *getStorage(bool renderTarget);
  
      bool isMipmapComplete() const;
  
      void redefineImage(GLint level, GLint internalformat, GLsizei width, GLsizei height);
      void commitRect(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height);
  
      rx::Image *mImageArray[IMPLEMENTATION_MAX_TEXTURE_LEVELS];
  
      rx::TextureStorageInterface2D *mTexStorage;
      egl::Surface *mSurface;
  
      // A specific internal reference count is kept for colorbuffer proxy references,
      // because, as the renderbuffer acting as proxy will maintain a binding pointer
      // back to this texture, there would be a circular reference if we used a binding
      // pointer here. This reference count will cause the pointer to be set to NULL if
      // the count drops to zero, but will not cause deletion of the Renderbuffer.
      Renderbuffer *mColorbufferProxy;
      unsigned int mProxyRefs;
  };
  
  class TextureCubeMap : public Texture
  {
    public:
      TextureCubeMap(rx::Renderer *renderer, GLuint id);
  
      ~TextureCubeMap();
  
      void addProxyRef(const Renderbuffer *proxy);
      void releaseProxy(const Renderbuffer *proxy);
  
      virtual GLenum getTarget() const;
      
      GLsizei getWidth(GLenum target, GLint level) const;
      GLsizei getHeight(GLenum target, GLint level) const;
      GLenum getInternalFormat(GLenum target, GLint level) const;
      GLenum getActualFormat(GLenum target, GLint level) const;
      bool isCompressed(GLenum target, GLint level) const;
  
      void setImagePosX(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImageNegX(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImagePosY(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImageNegY(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImagePosZ(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImageNegZ(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
  
      void setCompressedImage(GLenum face, GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei imageSize, const void *pixels);
  
      void subImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void subImageCompressed(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels);
      void copyImage(GLenum target, GLint level, GLenum format, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);
      virtual void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);
      void storage(GLsizei levels, GLenum internalformat, GLsizei size);
  
      virtual bool isSamplerComplete() const;
  
      virtual void generateMipmaps();
  
      virtual Renderbuffer *getRenderbuffer(GLenum target);
  
      static unsigned int faceIndex(GLenum face);
  
    protected:
      friend class RenderbufferTextureCubeMap;
      virtual rx::RenderTarget *getRenderTarget(GLenum target);
      virtual int levelCount();
  
    private:
      DISALLOW_COPY_AND_ASSIGN(TextureCubeMap);
  
      virtual void createTexture();
      virtual void updateTexture();
      virtual void convertToRenderTarget();
      virtual rx::TextureStorageInterface *getStorage(bool renderTarget);
  
      bool isCubeComplete() const;
      bool isMipmapCubeComplete() const;
  
      void setImage(int faceIndex, GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void commitRect(int faceIndex, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height);
      void redefineImage(int faceIndex, GLint level, GLint internalformat, GLsizei width, GLsizei height);
  
      rx::Image *mImageArray[6][IMPLEMENTATION_MAX_TEXTURE_LEVELS];
  
      rx::TextureStorageInterfaceCube *mTexStorage;
  
      // A specific internal reference count is kept for colorbuffer proxy references,
      // because, as the renderbuffer acting as proxy will maintain a binding pointer
      // back to this texture, there would be a circular reference if we used a binding
      // pointer here. This reference count will cause the pointer to be set to NULL if
      // the count drops to zero, but will not cause deletion of the Renderbuffer.
      Renderbuffer *mFaceProxies[6];
      unsigned int *mFaceProxyRefs[6];
  };
  }
  
  #endif   // LIBGLESV2_TEXTURE_H_
  

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