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

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• Author : daniel@transgaming.com
  Date : 2010-03-21 04:31:11
  Hash : 3489e3ae
  Message : Implement glPixelStorei for Tex(Sub)Image2D. TRAC #11475 Author: Andrew Lewycky Signed-off-by: Nicolas Capens Signed-off-by: Daniel Koch git-svn-id: https://angleproject.googlecode.com/svn/trunk@55 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/libGLESv2/Texture.h

• //
  // Copyright (c) 2002-2010 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 "Renderbuffer.h"
  
  #define GL_APICALL
  #include <GLES2/gl2.h>
  #include <d3d9.h>
  
  #include <vector>
  
  namespace gl
  {
  enum
  {
      MAX_TEXTURE_SIZE = 2048,
      MAX_CUBE_MAP_TEXTURE_SIZE = 2048,
  
      MAX_TEXTURE_LEVELS = 12   // 1+log2 of MAX_TEXTURE_SIZE
  };
  
  class Texture : public Colorbuffer
  {
    public:
      Texture();
  
      ~Texture();
  
      virtual GLenum getTarget() const = 0;
  
      bool setMinFilter(GLenum filter);
      bool setMagFilter(GLenum filter);
      bool setWrapS(GLenum wrap);
      bool setWrapT(GLenum wrap);
  
      GLenum getMinFilter() const;
      GLenum getMagFilter() const;
      GLenum getWrapS() const;
      GLenum getWrapT() const;
  
      virtual bool isComplete() const = 0;
  
      IDirect3DBaseTexture9 *getTexture();
      IDirect3DSurface9 *getRenderTarget(GLenum target);
      IDirect3DSurface9 *getRenderTarget() { return getRenderTarget(GL_TEXTURE_2D); } // FIXME: to be removed once FBO rendering is completed.
  
    protected:
      // Helper structure representing a single image layer
      struct Image
      {
          Image();
          ~Image();
  
          GLsizei width;
          GLsizei height;
          GLenum format;
  
          bool dirty;
  
          IDirect3DSurface9 *surface;
      };
  
      static D3DFORMAT selectFormat(GLenum format);
      static int pixelSize(GLenum format, GLenum type);
      int imagePitch(const Image& img) const;
  
      GLenum mMinFilter;
      GLenum mMagFilter;
      GLenum mWrapS;
      GLenum mWrapT;
  
      void setImage(GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels, Image *img);
      void subImage(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels, Image *img);
  
      // The pointer returned is weak and it is assumed the derived class will keep a strong pointer until the next createTexture() call.
      virtual IDirect3DBaseTexture9 *createTexture() = 0;
      virtual void updateTexture() = 0;
      virtual IDirect3DBaseTexture9 *convertToRenderTarget() = 0;
      virtual IDirect3DSurface9 *getSurface(GLenum target) = 0;
  
      virtual bool dirtyImageData() const = 0;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Texture);
  
      IDirect3DBaseTexture9 *mBaseTexture; // This is a weak pointer. The derived class is assumed to own a strong pointer.
  
      bool mDirtyMetaData;
  
      void loadImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type,
                         GLint unpackAlignment, const void *input, std::size_t outputPitch, void *output) const;
  
      GLsizei computePitch(GLsizei width, GLenum format, GLenum type, GLint alignment) const;
  };
  
  class Texture2D : public Texture
  {
    public:
      Texture2D();
  
      ~Texture2D();
  
      GLenum getTarget() const;
  
      void setImage(GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void subImage(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
  
      bool isComplete() const;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Texture2D);
  
      virtual IDirect3DBaseTexture9 *createTexture();
      virtual void updateTexture();
      virtual IDirect3DBaseTexture9 *convertToRenderTarget();
      virtual IDirect3DSurface9 *getSurface(GLenum target);
  
      virtual bool dirtyImageData() const;
  
      void commitRect(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height);
  
      Image mImageArray[MAX_TEXTURE_LEVELS];
  
      IDirect3DTexture9 *mTexture;
  };
  
  class TextureCubeMap : public Texture
  {
    public:
      TextureCubeMap();
  
      ~TextureCubeMap();
  
      GLenum getTarget() const;
  
      void setImagePosX(GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImageNegX(GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImagePosY(GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImageNegY(GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImagePosZ(GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void setImageNegZ(GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
  
      void subImage(GLenum face, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
  
      bool isComplete() const;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(TextureCubeMap);
  
      virtual IDirect3DBaseTexture9 *createTexture();
      virtual void updateTexture();
      virtual IDirect3DBaseTexture9 *convertToRenderTarget();
      virtual IDirect3DSurface9 *getSurface(GLenum target);
  
      virtual bool dirtyImageData() const;
  
      static unsigned int faceIndex(GLenum face);
  
      void setImage(int face, GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels);
      void commitRect(GLenum faceTarget, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height);
  
      Image mImageArray[6][MAX_TEXTURE_LEVELS];
  
      IDirect3DCubeTexture9 *mTexture;
  };
  }
  
  #endif   // LIBGLESV2_TEXTURE_H_