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

Branch : - branch - main - tag -

• Show log

  Commit

• Author : jbauman@chromium.org
  Date : 2011-10-13 21:35:52
  Hash : 040c4db3
  Message : Cache currently-bound draw buffer. Avoids a hash table lookup BUG= TEST=webgl conformance tests Review URL: http://codereview.appspot.com/5261042 git-svn-id: https://angleproject.googlecode.com/svn/trunk@794 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/libGLESv2/Context.h

• //
  // Copyright (c) 2002-2011 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.
  //
  
  // Context.h: Defines the gl::Context class, managing all GL state and performing
  // rendering operations. It is the GLES2 specific implementation of EGLContext.
  
  #ifndef LIBGLESV2_CONTEXT_H_
  #define LIBGLESV2_CONTEXT_H_
  
  #define GL_APICALL
  #include <GLES2/gl2.h>
  #include <GLES2/gl2ext.h>
  #define EGLAPI
  #include <EGL/egl.h>
  #include <d3d9.h>
  
  #include <map>
  #include <hash_map>
  
  #include "common/angleutils.h"
  #include "libGLESv2/ResourceManager.h"
  #include "libGLESv2/HandleAllocator.h"
  #include "libGLESv2/RefCountObject.h"
  
  namespace egl
  {
  class Display;
  class Surface;
  class Config;
  }
  
  namespace gl
  {
  struct TranslatedAttribute;
  struct TranslatedIndexData;
  
  class Buffer;
  class Shader;
  class Program;
  class Texture;
  class Texture2D;
  class TextureCubeMap;
  class Framebuffer;
  class Renderbuffer;
  class RenderbufferStorage;
  class Colorbuffer;
  class Depthbuffer;
  class StreamingIndexBuffer;
  class Stencilbuffer;
  class DepthStencilbuffer;
  class VertexDataManager;
  class IndexDataManager;
  class Blit;
  class Fence;
  
  enum
  {
      MAX_VERTEX_ATTRIBS = 16,
      MAX_VERTEX_UNIFORM_VECTORS = 256 - 2,   // 256 is the minimum for SM2, and in practice the maximum for DX9. Reserve space for dx_HalfPixelSize and dx_DepthRange.
      MAX_VARYING_VECTORS_SM2 = 8,
      MAX_VARYING_VECTORS_SM3 = 10,
      MAX_TEXTURE_IMAGE_UNITS = 16,
      MAX_VERTEX_TEXTURE_IMAGE_UNITS_VTF = 4,   // For devices supporting vertex texture fetch
      MAX_COMBINED_TEXTURE_IMAGE_UNITS_VTF = MAX_TEXTURE_IMAGE_UNITS + MAX_VERTEX_TEXTURE_IMAGE_UNITS_VTF,    
      MAX_FRAGMENT_UNIFORM_VECTORS_SM2 = 32 - 3,    // Reserve space for dx_Viewport, dx_Depth, and dx_DepthRange. dx_PointOrLines and dx_FrontCCW use separate bool registers.
      MAX_FRAGMENT_UNIFORM_VECTORS_SM3 = 224 - 3,
      MAX_DRAW_BUFFERS = 1,
  
      IMPLEMENTATION_COLOR_READ_FORMAT = GL_RGB,
      IMPLEMENTATION_COLOR_READ_TYPE = GL_UNSIGNED_SHORT_5_6_5
  };
  
  const float ALIASED_LINE_WIDTH_RANGE_MIN = 1.0f;
  const float ALIASED_LINE_WIDTH_RANGE_MAX = 1.0f;
  const float ALIASED_POINT_SIZE_RANGE_MIN = 1.0f;
  const float ALIASED_POINT_SIZE_RANGE_MAX_SM2 = 1.0f;
  const float ALIASED_POINT_SIZE_RANGE_MAX_SM3 = 64.0f;
  
  struct Color
  {
      float red;
      float green;
      float blue;
      float alpha;
  };
  
  // Helper structure describing a single vertex attribute
  class VertexAttribute
  {
    public:
      VertexAttribute() : mType(GL_FLOAT), mSize(0), mNormalized(false), mStride(0), mPointer(NULL), mArrayEnabled(false)
      {
          mCurrentValue[0] = 0.0f;
          mCurrentValue[1] = 0.0f;
          mCurrentValue[2] = 0.0f;
          mCurrentValue[3] = 1.0f;
      }
  
      int typeSize() const
      {
          switch (mType)
          {
            case GL_BYTE:           return mSize * sizeof(GLbyte);
            case GL_UNSIGNED_BYTE:  return mSize * sizeof(GLubyte);
            case GL_SHORT:          return mSize * sizeof(GLshort);
            case GL_UNSIGNED_SHORT: return mSize * sizeof(GLushort);
            case GL_FIXED:          return mSize * sizeof(GLfixed);
            case GL_FLOAT:          return mSize * sizeof(GLfloat);
            default: UNREACHABLE(); return mSize * sizeof(GLfloat);
          }
      }
  
      GLsizei stride() const
      {
          return mStride ? mStride : typeSize();
      }
  
      // From glVertexAttribPointer
      GLenum mType;
      GLint mSize;
      bool mNormalized;
      GLsizei mStride;   // 0 means natural stride
  
      union
      {
          const void *mPointer;
          intptr_t mOffset;
      };
  
      BindingPointer<Buffer> mBoundBuffer;   // Captured when glVertexAttribPointer is called.
  
      bool mArrayEnabled;   // From glEnable/DisableVertexAttribArray
      float mCurrentValue[4];   // From glVertexAttrib
  };
  
  typedef VertexAttribute VertexAttributeArray[MAX_VERTEX_ATTRIBS];
  
  // Helper structure to store all raw state
  struct State
  {
      Color colorClearValue;
      GLclampf depthClearValue;
      int stencilClearValue;
  
      bool cullFace;
      GLenum cullMode;
      GLenum frontFace;
      bool depthTest;
      GLenum depthFunc;
      bool blend;
      GLenum sourceBlendRGB;
      GLenum destBlendRGB;
      GLenum sourceBlendAlpha;
      GLenum destBlendAlpha;
      GLenum blendEquationRGB;
      GLenum blendEquationAlpha;
      Color blendColor;
      bool stencilTest;
      GLenum stencilFunc;
      GLint stencilRef;
      GLuint stencilMask;
      GLenum stencilFail;
      GLenum stencilPassDepthFail;
      GLenum stencilPassDepthPass;
      GLuint stencilWritemask;
      GLenum stencilBackFunc;
      GLint stencilBackRef;
      GLuint stencilBackMask;
      GLenum stencilBackFail;
      GLenum stencilBackPassDepthFail;
      GLenum stencilBackPassDepthPass;
      GLuint stencilBackWritemask;
      bool polygonOffsetFill;
      GLfloat polygonOffsetFactor;
      GLfloat polygonOffsetUnits;
      bool sampleAlphaToCoverage;
      bool sampleCoverage;
      GLclampf sampleCoverageValue;
      bool sampleCoverageInvert;
      bool scissorTest;
      bool dither;
  
      GLfloat lineWidth;
  
      GLenum generateMipmapHint;
      GLenum fragmentShaderDerivativeHint;
  
      GLint viewportX;
      GLint viewportY;
      GLsizei viewportWidth;
      GLsizei viewportHeight;
      float zNear;
      float zFar;
  
      GLint scissorX;
      GLint scissorY;
      GLsizei scissorWidth;
      GLsizei scissorHeight;
  
      bool colorMaskRed;
      bool colorMaskGreen;
      bool colorMaskBlue;
      bool colorMaskAlpha;
      bool depthMask;
  
      unsigned int activeSampler;   // Active texture unit selector - GL_TEXTURE0
      BindingPointer<Buffer> arrayBuffer;
      BindingPointer<Buffer> elementArrayBuffer;
      GLuint readFramebuffer;
      GLuint drawFramebuffer;
      BindingPointer<Renderbuffer> renderbuffer;
      GLuint currentProgram;
  
      VertexAttribute vertexAttribute[MAX_VERTEX_ATTRIBS];
      BindingPointer<Texture> samplerTexture[TEXTURE_TYPE_COUNT][MAX_COMBINED_TEXTURE_IMAGE_UNITS_VTF];
  
      GLint unpackAlignment;
      GLint packAlignment;
  };
  
  // Helper class to construct and cache vertex declarations
  class VertexDeclarationCache
  {
    public:
      VertexDeclarationCache();
      ~VertexDeclarationCache();
  
      GLenum applyDeclaration(TranslatedAttribute attributes[], Program *program);
  
      void markStateDirty();
  
    private:
      UINT mMaxLru;
  
      enum { NUM_VERTEX_DECL_CACHE_ENTRIES = 16 };
  
      struct VBData
      {
          unsigned int serial;
          unsigned int stride;
          unsigned int offset;
      };
  
      VBData mAppliedVBs[MAX_VERTEX_ATTRIBS];
      IDirect3DVertexDeclaration9 *mLastSetVDecl;
  
      struct VertexDeclCacheEntry
      {
          D3DVERTEXELEMENT9 cachedElements[MAX_VERTEX_ATTRIBS + 1];
          UINT lruCount;
          IDirect3DVertexDeclaration9 *vertexDeclaration;
      } mVertexDeclCache[NUM_VERTEX_DECL_CACHE_ENTRIES];
  };
  
  class Context
  {
    public:
      Context(const egl::Config *config, const gl::Context *shareContext);
  
      ~Context();
  
      void makeCurrent(egl::Display *display, egl::Surface *surface);
  
      void markAllStateDirty();
  
      // State manipulation
      void setClearColor(float red, float green, float blue, float alpha);
  
      void setClearDepth(float depth);
  
      void setClearStencil(int stencil);
  
      void setCullFace(bool enabled);
      bool isCullFaceEnabled() const;
  
      void setCullMode(GLenum mode);
  
      void setFrontFace(GLenum front);
  
      void setDepthTest(bool enabled);
      bool isDepthTestEnabled() const;
  
      void setDepthFunc(GLenum depthFunc);
  
      void setDepthRange(float zNear, float zFar);
      
      void setBlend(bool enabled);
      bool isBlendEnabled() const;
  
      void setBlendFactors(GLenum sourceRGB, GLenum destRGB, GLenum sourceAlpha, GLenum destAlpha);
      void setBlendColor(float red, float green, float blue, float alpha);
      void setBlendEquation(GLenum rgbEquation, GLenum alphaEquation);
  
      void setStencilTest(bool enabled);
      bool isStencilTestEnabled() const;
  
      void setStencilParams(GLenum stencilFunc, GLint stencilRef, GLuint stencilMask);
      void setStencilBackParams(GLenum stencilBackFunc, GLint stencilBackRef, GLuint stencilBackMask);
      void setStencilWritemask(GLuint stencilWritemask);
      void setStencilBackWritemask(GLuint stencilBackWritemask);
      void setStencilOperations(GLenum stencilFail, GLenum stencilPassDepthFail, GLenum stencilPassDepthPass);
      void setStencilBackOperations(GLenum stencilBackFail, GLenum stencilBackPassDepthFail, GLenum stencilBackPassDepthPass);
  
      void setPolygonOffsetFill(bool enabled);
      bool isPolygonOffsetFillEnabled() const;
  
      void setPolygonOffsetParams(GLfloat factor, GLfloat units);
  
      void setSampleAlphaToCoverage(bool enabled);
      bool isSampleAlphaToCoverageEnabled() const;
  
      void setSampleCoverage(bool enabled);
      bool isSampleCoverageEnabled() const;
  
      void setSampleCoverageParams(GLclampf value, bool invert);
  
      void setScissorTest(bool enabled);
      bool isScissorTestEnabled() const;
  
      void setDither(bool enabled);
      bool isDitherEnabled() const;
  
      void setLineWidth(GLfloat width);
  
      void setGenerateMipmapHint(GLenum hint);
      void setFragmentShaderDerivativeHint(GLenum hint);
  
      void setViewportParams(GLint x, GLint y, GLsizei width, GLsizei height);
  
      void setScissorParams(GLint x, GLint y, GLsizei width, GLsizei height);
  
      void setColorMask(bool red, bool green, bool blue, bool alpha);
      void setDepthMask(bool mask);
  
      void setActiveSampler(unsigned int active);
  
      GLuint getReadFramebufferHandle() const;
      GLuint getDrawFramebufferHandle() const;
      GLuint getRenderbufferHandle() const;
  
      GLuint getArrayBufferHandle() const;
  
      void setEnableVertexAttribArray(unsigned int attribNum, bool enabled);
      const VertexAttribute &getVertexAttribState(unsigned int attribNum);
      void setVertexAttribState(unsigned int attribNum, Buffer *boundBuffer, GLint size, GLenum type,
                                bool normalized, GLsizei stride, const void *pointer);
      const void *getVertexAttribPointer(unsigned int attribNum) const;
  
      const VertexAttributeArray &getVertexAttributes();
  
      void setUnpackAlignment(GLint alignment);
      GLint getUnpackAlignment() const;
  
      void setPackAlignment(GLint alignment);
      GLint getPackAlignment() const;
  
      // These create  and destroy methods are merely pass-throughs to 
      // ResourceManager, which owns these object types
      GLuint createBuffer();
      GLuint createShader(GLenum type);
      GLuint createProgram();
      GLuint createTexture();
      GLuint createRenderbuffer();
  
      void deleteBuffer(GLuint buffer);
      void deleteShader(GLuint shader);
      void deleteProgram(GLuint program);
      void deleteTexture(GLuint texture);
      void deleteRenderbuffer(GLuint renderbuffer);
  
      // Framebuffers are owned by the Context, so these methods do not pass through
      GLuint createFramebuffer();
      void deleteFramebuffer(GLuint framebuffer);
  
      // Fences are owned by the Context.
      GLuint createFence();
      void deleteFence(GLuint fence);
  
      void bindArrayBuffer(GLuint buffer);
      void bindElementArrayBuffer(GLuint buffer);
      void bindTexture2D(GLuint texture);
      void bindTextureCubeMap(GLuint texture);
      void bindReadFramebuffer(GLuint framebuffer);
      void bindDrawFramebuffer(GLuint framebuffer);
      void bindRenderbuffer(GLuint renderbuffer);
      void useProgram(GLuint program);
  
      void setFramebufferZero(Framebuffer *framebuffer);
  
      void setRenderbufferStorage(RenderbufferStorage *renderbuffer);
  
      void setVertexAttrib(GLuint index, const GLfloat *values);
  
      Buffer *getBuffer(GLuint handle);
      Fence *getFence(GLuint handle);
      Shader *getShader(GLuint handle);
      Program *getProgram(GLuint handle);
      Texture *getTexture(GLuint handle);
      Framebuffer *getFramebuffer(GLuint handle);
      Renderbuffer *getRenderbuffer(GLuint handle);
  
      Buffer *getArrayBuffer();
      Buffer *getElementArrayBuffer();
      Program *getCurrentProgram();
      Texture2D *getTexture2D();
      TextureCubeMap *getTextureCubeMap();
      Texture *getSamplerTexture(unsigned int sampler, TextureType type);
      Framebuffer *getReadFramebuffer();
      Framebuffer *getDrawFramebuffer();
  
      bool getFloatv(GLenum pname, GLfloat *params);
      bool getIntegerv(GLenum pname, GLint *params);
      bool getBooleanv(GLenum pname, GLboolean *params);
  
      bool getQueryParameterInfo(GLenum pname, GLenum *type, unsigned int *numParams);
  
      void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void* pixels);
      void clear(GLbitfield mask);
      void drawArrays(GLenum mode, GLint first, GLsizei count);
      void drawElements(GLenum mode, GLsizei count, GLenum type, const void *indices);
      void finish();
      void flush();
  
  	// Draw the last segment of a line loop
      void drawClosingLine(unsigned int first, unsigned int last);
      void drawClosingLine(GLsizei count, GLenum type, const void *indices);
  
      void recordInvalidEnum();
      void recordInvalidValue();
      void recordInvalidOperation();
      void recordOutOfMemory();
      void recordInvalidFramebufferOperation();
  
      GLenum getError();
  
      bool supportsShaderModel3() const;
      int getMaximumVaryingVectors() const;
      unsigned int getMaximumVertexTextureImageUnits() const;
      unsigned int getMaximumCombinedTextureImageUnits() const;
      int getMaximumFragmentUniformVectors() const;
      int getMaximumRenderbufferDimension() const;
      int getMaximumTextureDimension() const;
      int getMaximumCubeTextureDimension() const;
      int getMaximumTextureLevel() const;
      GLsizei getMaxSupportedSamples() const;
      int getNearestSupportedSamples(D3DFORMAT format, int requested) const;
      const char *getExtensionString() const;
      const char *getRendererString() const;
      bool supportsEventQueries() const;
      bool supportsDXT1Textures() const;
      bool supportsDXT3Textures() const;
      bool supportsDXT5Textures() const;
      bool supportsFloatTextures() const;
      bool supportsFloatLinearFilter() const;
      bool supportsFloatRenderableTextures() const;
      bool supportsHalfFloatTextures() const;
      bool supportsHalfFloatLinearFilter() const;
      bool supportsHalfFloatRenderableTextures() const;
      bool supportsLuminanceTextures() const;
      bool supportsLuminanceAlphaTextures() const;
      bool supports32bitIndices() const;
      bool supportsNonPower2Texture() const;
  
      void blitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, 
                           GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
                           GLbitfield mask);
  
      Blit *getBlitter() { return mBlit; }
  
      const D3DCAPS9 &getDeviceCaps() { return mDeviceCaps; }
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Context);
  
      bool applyRenderTarget(bool ignoreViewport);
      void applyState(GLenum drawMode);
      GLenum applyVertexBuffer(GLint first, GLsizei count);
      GLenum applyIndexBuffer(const void *indices, GLsizei count, GLenum mode, GLenum type, TranslatedIndexData *indexInfo);
      void applyShaders();
      void applyTextures();
      void applyTextures(SamplerType type);
  
      void detachBuffer(GLuint buffer);
      void detachTexture(GLuint texture);
      void detachFramebuffer(GLuint framebuffer);
      void detachRenderbuffer(GLuint renderbuffer);
  
      Texture *getIncompleteTexture(TextureType type);
  
      bool cullSkipsDraw(GLenum drawMode);
      bool isTriangleMode(GLenum drawMode);
  
      void initExtensionString();
      void initRendererString();
  
      const egl::Config *const mConfig;
  
      State mState;
  
      BindingPointer<Texture2D> mTexture2DZero;
      BindingPointer<TextureCubeMap> mTextureCubeMapZero;
  
      typedef stdext::hash_map<GLuint, Framebuffer*> FramebufferMap;
      FramebufferMap mFramebufferMap;
      HandleAllocator mFramebufferHandleAllocator;
  
      typedef stdext::hash_map<GLuint, Fence*> FenceMap;
      FenceMap mFenceMap;
      HandleAllocator mFenceHandleAllocator;
  
      std::string mExtensionString;
      std::string mRendererString;
  
      VertexDataManager *mVertexDataManager;
      IndexDataManager *mIndexDataManager;
  
      Blit *mBlit;
  
      StreamingIndexBuffer *mClosingIB;
      
      BindingPointer<Texture> mIncompleteTextures[TEXTURE_TYPE_COUNT];
  
      // Recorded errors
      bool mInvalidEnum;
      bool mInvalidValue;
      bool mInvalidOperation;
      bool mOutOfMemory;
      bool mInvalidFramebufferOperation;
  
      bool mHasBeenCurrent;
  
      unsigned int mAppliedTextureSerialPS[MAX_TEXTURE_IMAGE_UNITS];
      unsigned int mAppliedTextureSerialVS[MAX_VERTEX_TEXTURE_IMAGE_UNITS_VTF];
      unsigned int mAppliedProgramSerial;
      unsigned int mAppliedRenderTargetSerial;
      unsigned int mAppliedDepthbufferSerial;
      unsigned int mAppliedStencilbufferSerial;
      unsigned int mAppliedIBSerial;
      bool mDepthStencilInitialized;
      bool mViewportInitialized;
      D3DVIEWPORT9 mSetViewport;
      bool mRenderTargetDescInitialized;
      D3DSURFACE_DESC mRenderTargetDesc;
      bool mDxUniformsDirty;
      Program *mCachedCurrentProgram;
      Framebuffer *mBoundDrawFramebuffer;
  
      bool mSupportsShaderModel3;
      bool mSupportsVertexTexture;
      bool mSupportsNonPower2Texture;
      int  mMaxRenderbufferDimension;
      int  mMaxTextureDimension;
      int  mMaxCubeTextureDimension;
      int  mMaxTextureLevel;
      std::map<D3DFORMAT, bool *> mMultiSampleSupport;
      GLsizei mMaxSupportedSamples;
      bool mSupportsEventQueries;
      bool mSupportsDXT1Textures;
      bool mSupportsDXT3Textures;
      bool mSupportsDXT5Textures;
      bool mSupportsFloatTextures;
      bool mSupportsFloatLinearFilter;
      bool mSupportsFloatRenderableTextures;
      bool mSupportsHalfFloatTextures;
      bool mSupportsHalfFloatLinearFilter;
      bool mSupportsHalfFloatRenderableTextures;
      bool mSupportsLuminanceTextures;
      bool mSupportsLuminanceAlphaTextures;
      bool mSupports32bitIndices;
      int mNumCompressedTextureFormats;
  
      // state caching flags
      bool mClearStateDirty;
      bool mCullStateDirty;
      bool mDepthStateDirty;
      bool mMaskStateDirty;
      bool mPixelPackingStateDirty;
      bool mBlendStateDirty;
      bool mStencilStateDirty;
      bool mPolygonOffsetStateDirty;
      bool mScissorStateDirty;
      bool mSampleStateDirty;
      bool mFrontFaceDirty;
      bool mDitherStateDirty;
  
      IDirect3DStateBlock9 *mMaskedClearSavedState;
  
      D3DCAPS9 mDeviceCaps;
  
      ResourceManager *mResourceManager;
  
      VertexDeclarationCache mVertexDeclarationCache;
  };
  }
  
  extern "C"
  {
  // Exported functions for use by EGL
  gl::Context *glCreateContext(const egl::Config *config, const gl::Context *shareContext);
  void glDestroyContext(gl::Context *context);
  void glMakeCurrent(gl::Context *context, egl::Display *display, egl::Surface *surface);
  gl::Context *glGetCurrentContext();
  __eglMustCastToProperFunctionPointerType __stdcall glGetProcAddress(const char *procname);
  void __stdcall glBindTexImage(egl::Surface *surface);
  }
  
  #endif   // INCLUDE_CONTEXT_H_