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

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• Hash : 76b10c9a
  Author :
  Date : 2014-09-05T16:28:14
  

  Use dynamically sized containers for texture and sampler bindings.
  
  BUG=angle:685
  
  Change-Id: I7af97a95deee69fbdebca2b57403244f45516e67
  Reviewed-on: https://chromium-review.googlesource.com/216564
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Tested-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libGLESv2/State.h

• //
  // Copyright (c) 2014 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.
  //
  
  // State.h: Defines the State class, encapsulating raw GL state
  
  #ifndef LIBGLESV2_STATE_H_
  #define LIBGLESV2_STATE_H_
  
  #include "common/angleutils.h"
  #include "common/RefCountObject.h"
  #include "libGLESv2/angletypes.h"
  #include "libGLESv2/VertexAttribute.h"
  #include "libGLESv2/Renderbuffer.h"
  #include "libGLESv2/Texture.h"
  #include "libGLESv2/TransformFeedback.h"
  #include "libGLESv2/Program.h"
  #include "libGLESv2/Sampler.h"
  
  namespace gl
  {
  class Query;
  class VertexArray;
  class Context;
  struct Caps;
  
  class State
  {
    public:
      State();
      ~State();
  
      void initialize(const Caps& caps, GLuint clientVersion);
      void reset();
  
      void setContext(Context *context) { mContext = context; }
  
      // State chunk getters
      const RasterizerState &getRasterizerState() const;
      const BlendState &getBlendState() const;
      const DepthStencilState &getDepthStencilState() const;
  
      // Clear behavior setters & state parameter block generation function
      void setClearColor(float red, float green, float blue, float alpha);
      void setClearDepth(float depth);
      void setClearStencil(int stencil);
      ClearParameters getClearParameters(GLbitfield mask) const;
  
      // Write mask manipulation
      void setColorMask(bool red, bool green, bool blue, bool alpha);
      void setDepthMask(bool mask);
  
      // Discard toggle & query
      bool isRasterizerDiscardEnabled() const;
      void setRasterizerDiscard(bool enabled);
  
      // Face culling state manipulation
      bool isCullFaceEnabled() const;
      void setCullFace(bool enabled);
      void setCullMode(GLenum mode);
      void setFrontFace(GLenum front);
  
      // Depth test state manipulation
      bool isDepthTestEnabled() const;
      void setDepthTest(bool enabled);
      void setDepthFunc(GLenum depthFunc);
      void setDepthRange(float zNear, float zFar);
      void getDepthRange(float *zNear, float *zFar) const;
  
      // Blend state manipulation
      bool isBlendEnabled() const;
      void setBlend(bool enabled);
      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);
      const ColorF &getBlendColor() const;
  
      // Stencil state maniupulation
      bool isStencilTestEnabled() const;
      void setStencilTest(bool enabled);
      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);
      GLint getStencilRef() const;
      GLint getStencilBackRef() const;
  
      // Depth bias/polygon offset state manipulation
      bool isPolygonOffsetFillEnabled() const;
      void setPolygonOffsetFill(bool enabled);
      void setPolygonOffsetParams(GLfloat factor, GLfloat units);
  
      // Multisample coverage state manipulation
      bool isSampleAlphaToCoverageEnabled() const;
      void setSampleAlphaToCoverage(bool enabled);
      bool isSampleCoverageEnabled() const;
      void setSampleCoverage(bool enabled);
      void setSampleCoverageParams(GLclampf value, bool invert);
      void getSampleCoverageParams(GLclampf *value, bool *invert);
  
      // Scissor test state toggle & query
      bool isScissorTestEnabled() const;
      void setScissorTest(bool enabled);
      void setScissorParams(GLint x, GLint y, GLsizei width, GLsizei height);
      const Rectangle &getScissor() const;
  
      // Dither state toggle & query
      bool isDitherEnabled() const;
      void setDither(bool enabled);
  
      // Generic state toggle & query
      void setEnableFeature(GLenum feature, bool enabled);
      bool getEnableFeature(GLenum feature);
  
      // Line width state setter
      void setLineWidth(GLfloat width);
  
      // Hint setters
      void setGenerateMipmapHint(GLenum hint);
      void setFragmentShaderDerivativeHint(GLenum hint);
  
      // Viewport state setter/getter
      void setViewportParams(GLint x, GLint y, GLsizei width, GLsizei height);
      const Rectangle &getViewport() const;
  
      // Texture binding & active texture unit manipulation
      void setActiveSampler(unsigned int active);
      unsigned int getActiveSampler() const;
      void setSamplerTexture(GLenum type, Texture *texture);
      Texture *getSamplerTexture(unsigned int sampler, GLenum type) const;
      GLuint getSamplerTextureId(unsigned int sampler, GLenum type) const;
      void detachTexture(GLuint texture);
  
      // Sampler object binding manipulation
      void setSamplerBinding(GLuint textureUnit, Sampler *sampler);
      GLuint getSamplerId(GLuint textureUnit) const;
      Sampler *getSampler(GLuint textureUnit) const;
      void detachSampler(GLuint sampler);
  
      // Renderbuffer binding manipulation
      void setRenderbufferBinding(Renderbuffer *renderbuffer);
      GLuint getRenderbufferId() const;
      Renderbuffer *getCurrentRenderbuffer();
      void detachRenderbuffer(GLuint renderbuffer);
  
      // Framebuffer binding manipulation
      void setReadFramebufferBinding(Framebuffer *framebuffer);
      void setDrawFramebufferBinding(Framebuffer *framebuffer);
      Framebuffer *getTargetFramebuffer(GLenum target) const;
      Framebuffer *getReadFramebuffer();
      Framebuffer *getDrawFramebuffer();
      const Framebuffer *getReadFramebuffer() const;
      const Framebuffer *getDrawFramebuffer() const;
      bool removeReadFramebufferBinding(GLuint framebuffer);
      bool removeDrawFramebufferBinding(GLuint framebuffer);
  
      // Vertex array object binding manipulation
      void setVertexArrayBinding(VertexArray *vertexArray);
      GLuint getVertexArrayId() const;
      VertexArray *getVertexArray() const;
      bool removeVertexArrayBinding(GLuint vertexArray);
  
      // Program binding manipulation
      void setCurrentProgram(GLuint programId, Program *newProgram);
      void setCurrentProgramBinary(ProgramBinary *binary);
      GLuint getCurrentProgramId() const;
      ProgramBinary *getCurrentProgramBinary() const;
  
      // Transform feedback object (not buffer) binding manipulation
      void setTransformFeedbackBinding(TransformFeedback *transformFeedback);
      TransformFeedback *getCurrentTransformFeedback() const;
      void detachTransformFeedback(GLuint transformFeedback);
  
      // Query binding manipulation
      bool isQueryActive() const;
      void setActiveQuery(GLenum target, Query *query);
      GLuint getActiveQueryId(GLenum target) const;
      Query *getActiveQuery(GLenum target) const;
  
      //// Typed buffer binding point manipulation ////
      // GL_ARRAY_BUFFER
      void setArrayBufferBinding(Buffer *buffer);
      GLuint getArrayBufferId() const;
      bool removeArrayBufferBinding(GLuint buffer);
  
      // GL_UNIFORM_BUFFER - Both indexed and generic targets
      void setGenericUniformBufferBinding(Buffer *buffer);
      void setIndexedUniformBufferBinding(GLuint index, Buffer *buffer, GLintptr offset, GLsizeiptr size);
      GLuint getIndexedUniformBufferId(GLuint index) const;
      Buffer *getIndexedUniformBuffer(GLuint index) const;
  
      // GL_TRANSFORM_FEEDBACK_BUFFER - Both indexed and generic targets
      void setGenericTransformFeedbackBufferBinding(Buffer *buffer);
      void setIndexedTransformFeedbackBufferBinding(GLuint index, Buffer *buffer, GLintptr offset, GLsizeiptr size);
      GLuint getIndexedTransformFeedbackBufferId(GLuint index) const;
      Buffer *getIndexedTransformFeedbackBuffer(GLuint index) const;
      GLuint getIndexedTransformFeedbackBufferOffset(GLuint index) const;
  
      // GL_COPY_[READ/WRITE]_BUFFER
      void setCopyReadBufferBinding(Buffer *buffer);
      void setCopyWriteBufferBinding(Buffer *buffer);
  
      // GL_PIXEL[PACK/UNPACK]_BUFFER
      void setPixelPackBufferBinding(Buffer *buffer);
      void setPixelUnpackBufferBinding(Buffer *buffer);
  
      // Retrieve typed buffer by target (non-indexed)
      Buffer *getTargetBuffer(GLenum target) const;
  
      // Vertex attrib manipulation
      void setEnableVertexAttribArray(unsigned int attribNum, bool enabled);
      void setVertexAttribf(GLuint index, const GLfloat values[4]);
      void setVertexAttribu(GLuint index, const GLuint values[4]);
      void setVertexAttribi(GLuint index, const GLint values[4]);
      void setVertexAttribState(unsigned int attribNum, Buffer *boundBuffer, GLint size, GLenum type,
                                bool normalized, bool pureInteger, GLsizei stride, const void *pointer);
      const VertexAttribute &getVertexAttribState(unsigned int attribNum) const;
      const VertexAttribCurrentValueData &getVertexAttribCurrentValue(unsigned int attribNum) const;
      const VertexAttribCurrentValueData *getVertexAttribCurrentValues() const;
      const void *getVertexAttribPointer(unsigned int attribNum) const;
  
      // Pixel pack state manipulation
      void setPackAlignment(GLint alignment);
      GLint getPackAlignment() const;
      void setPackReverseRowOrder(bool reverseRowOrder);
      bool getPackReverseRowOrder() const;
      const PixelPackState &getPackState() const;
  
      // Pixel unpack state manipulation
      void setUnpackAlignment(GLint alignment);
      GLint getUnpackAlignment() const;
      const PixelUnpackState &getUnpackState() const;
  
      // State query functions
      void getBooleanv(GLenum pname, GLboolean *params);
      void getFloatv(GLenum pname, GLfloat *params);
      void getIntegerv(GLenum pname, GLint *params);
      bool getIndexedIntegerv(GLenum target, GLuint index, GLint *data);
      bool getIndexedInteger64v(GLenum target, GLuint index, GLint64 *data);
  
      bool hasMappedBuffer(GLenum target) const;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(State);
  
      Context *mContext;
  
      ColorF mColorClearValue;
      GLclampf mDepthClearValue;
      int mStencilClearValue;
  
      RasterizerState mRasterizer;
      bool mScissorTest;
      Rectangle mScissor;
  
      BlendState mBlend;
      ColorF mBlendColor;
      bool mSampleCoverage;
      GLclampf mSampleCoverageValue;
      bool mSampleCoverageInvert;
  
      DepthStencilState mDepthStencil;
      GLint mStencilRef;
      GLint mStencilBackRef;
  
      GLfloat mLineWidth;
  
      GLenum mGenerateMipmapHint;
      GLenum mFragmentShaderDerivativeHint;
  
      Rectangle mViewport;
      float mNearZ;
      float mFarZ;
  
      BindingPointer<Buffer> mArrayBuffer;
      Framebuffer *mReadFramebuffer;
      Framebuffer *mDrawFramebuffer;
      BindingPointer<Renderbuffer> mRenderbuffer;
      GLuint mCurrentProgramId;
      BindingPointer<ProgramBinary> mCurrentProgramBinary;
  
      VertexAttribCurrentValueData mVertexAttribCurrentValues[MAX_VERTEX_ATTRIBS]; // From glVertexAttrib
      VertexArray *mVertexArray;
  
      // Texture and sampler bindings
      size_t mActiveSampler;   // Active texture unit selector - GL_TEXTURE0
  
      typedef std::vector< BindingPointer<Texture> > TextureBindingVector;
      typedef std::map<GLenum, TextureBindingVector> TextureBindingMap;
      TextureBindingMap mSamplerTextures;
  
      typedef std::vector< BindingPointer<Sampler> > SamplerBindingVector;
      SamplerBindingVector mSamplers;
  
      typedef std::map< GLenum, BindingPointer<Query> > ActiveQueryMap;
      ActiveQueryMap mActiveQueries;
  
      BindingPointer<Buffer> mGenericUniformBuffer;
      OffsetBindingPointer<Buffer> mUniformBuffers[IMPLEMENTATION_MAX_COMBINED_SHADER_UNIFORM_BUFFERS];
  
      BindingPointer<TransformFeedback> mTransformFeedback;
      BindingPointer<Buffer> mGenericTransformFeedbackBuffer;
      OffsetBindingPointer<Buffer> mTransformFeedbackBuffers[IMPLEMENTATION_MAX_TRANSFORM_FEEDBACK_BUFFERS];
  
      BindingPointer<Buffer> mCopyReadBuffer;
      BindingPointer<Buffer> mCopyWriteBuffer;
  
      PixelUnpackState mUnpack;
      PixelPackState mPack;
  };
  
  }
  
  #endif // LIBGLESV2_STATE_H_
  
  

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