kc3-lang/angle/src/libANGLE/GLES1State.h

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• Hash : 9c4c0926
  Author :
  Date : 2018-06-13T09:29:00
  

  Reland "GLES1: Point rasterization (partial implementation)"
  
  This is a reland of 4004ae0e033a0169de3cb53c0a036833ad47178a
  
  Fix: Put the missing early-out in ValidatePointParameterCommon
  
  Original change's description:
  > GLES1: Point rasterization (partial implementation)
  >
  > - Not included: Smooth points
  >
  > - GL_OES_point_sprite
  > - Update test expectations. Note: due to different random sampling,
  > edge cases were hit in UserClip. Disabling that test for now.
  >
  > BUG=angleproject:2306
  >
  > Change-Id: If8367bc3321804b3299d3bc381d6a8e236754baa
  > Reviewed-on: https://chromium-review.googlesource.com/1101910
  > Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  > Commit-Queue: Lingfeng Yang <lfy@google.com>
  
  Bug: angleproject:2306
  Change-Id: Id8e71352a77ff0ce71cb604965effbfb8aca613e
  Reviewed-on: https://chromium-review.googlesource.com/1108458
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Commit-Queue: Lingfeng Yang <lfy@google.com>
  

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• src/libANGLE/GLES1State.h

• //
  // Copyright 2018 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.
  //
  
  // GLES1State.h: Defines the GLES1State class holding the state of
  // a GLES1 context.
  
  #ifndef LIBANGLE_GLES1STATE_H_
  #define LIBANGLE_GLES1STATE_H_
  
  #include <unordered_set>
  
  #include "common/FixedVector.h"
  #include "common/angleutils.h"
  #include "common/matrix_utils.h"
  #include "common/vector_utils.h"
  #include "libANGLE/Caps.h"
  #include "libANGLE/angletypes.h"
  
  namespace gl
  {
  
  // State types specific to GLES1 contexts, from the OpenGL ES 1.1 spec "State Tables" section
  struct TextureCoordF
  {
      TextureCoordF();
      TextureCoordF(float _s, float _t, float _r, float _q);
      bool operator==(const TextureCoordF &other) const;
  
      GLfloat s = 0.0f;
      GLfloat t = 0.0f;
      GLfloat r = 0.0f;
      GLfloat q = 0.0f;
  };
  
  struct MaterialParameters
  {
      ColorF ambient;
      ColorF diffuse;
      ColorF specular;
      ColorF emissive;
      GLfloat specularExponent;
  };
  
  struct LightModelParameters
  {
      ColorF color;
      bool twoSided;
  };
  
  struct LightParameters
  {
      bool enabled                 = false;
      ColorF ambient               = {0.0f, 0.0f, 0.0f, 1.0f};
      ColorF diffuse               = {0.0f, 0.0f, 0.0f, 1.0f};
      ColorF specular              = {0.0f, 0.0f, 0.0f, 1.0f};
      angle::Vector4 position      = {0.0f, 0.0f, 1.0f, 0.0f};
      angle::Vector3 direction     = {0.0f, 0.0f, -1.0f};
      GLfloat spotlightExponent    = 0.0f;
      GLfloat spotlightCutoffAngle = 180.0f;
      GLfloat attenuationConst     = 1.0f;
      GLfloat attenuationLinear    = 0.0f;
      GLfloat attenuationQuadratic = 0.0f;
  };
  
  struct FogParameters
  {
      FogMode mode;
      GLfloat density;
      GLfloat start;
      GLfloat end;
      ColorF color;
  };
  
  struct TextureEnvironmentParameters
  {
      TextureEnvMode mode         = TextureEnvMode::Modulate;
      TextureCombine combineRgb   = TextureCombine::Modulate;
      TextureCombine combineAlpha = TextureCombine::Modulate;
  
      TextureSrc src0Rgb   = TextureSrc::Texture;
      TextureSrc src0Alpha = TextureSrc::Texture;
  
      TextureSrc src1Rgb   = TextureSrc::Previous;
      TextureSrc src1Alpha = TextureSrc::Previous;
  
      TextureSrc src2Rgb   = TextureSrc::Constant;
      TextureSrc src2Alpha = TextureSrc::Constant;
  
      TextureOp op0Rgb   = TextureOp::SrcColor;
      TextureOp op0Alpha = TextureOp::SrcAlpha;
  
      TextureOp op1Rgb   = TextureOp::SrcColor;
      TextureOp op1Alpha = TextureOp::SrcAlpha;
  
      TextureOp op2Rgb   = TextureOp::SrcAlpha;
      TextureOp op2Alpha = TextureOp::SrcAlpha;
  
      ColorF color       = {0.0f, 0.0f, 0.0f, 0.0f};
      GLfloat rgbScale   = 1.0f;
      GLfloat alphaScale = 1.0f;
  
      bool pointSpriteCoordReplace = false;
  };
  
  struct PointParameters
  {
      GLfloat pointSizeMin                    = 0.0f;
      GLfloat pointSizeMax                    = 1.0f;
      GLfloat pointFadeThresholdSize          = 1.0f;
      angle::Vector3 pointDistanceAttenuation = {1.0f, 0.0f, 0.0f};
      GLfloat pointSize                       = 1.0f;
  };
  
  struct ClipPlaneParameters
  {
      bool enabled;
      angle::Vector4 equation;
  };
  
  class Context;
  class GLES1Renderer;
  class State;
  
  class GLES1State final : angle::NonCopyable
  {
    public:
      GLES1State();
      ~GLES1State();
  
      void initialize(const Context *context, const State *state);
  
      void setAlphaFunc(AlphaTestFunc func, GLfloat ref);
      void setClientTextureUnit(unsigned int unit);
      unsigned int getClientTextureUnit() const;
  
      void setCurrentColor(const ColorF &color);
      const ColorF &getCurrentColor() const;
  
      void setCurrentNormal(const angle::Vector3 &normal);
      const angle::Vector3 &getCurrentNormal() const;
  
      void setCurrentTextureCoords(unsigned int unit, const TextureCoordF &coords);
      const TextureCoordF &getCurrentTextureCoords(unsigned int unit) const;
  
      void setMatrixMode(MatrixType mode);
      MatrixType getMatrixMode() const;
  
      void pushMatrix();
      void popMatrix();
  
      using MatrixStack = angle::FixedVector<angle::Mat4, Caps::GlobalMatrixStackDepth>;
      MatrixStack &currentMatrixStack();
      const MatrixStack &currentMatrixStack() const;
  
      const angle::Mat4 &getModelviewMatrix() const;
  
      void loadMatrix(const angle::Mat4 &m);
      void multMatrix(const angle::Mat4 &m);
  
      void setClientStateEnabled(ClientVertexArrayType clientState, bool enable);
      bool isClientStateEnabled(ClientVertexArrayType clientState) const;
      bool isTexCoordArrayEnabled(unsigned int unit) const;
      bool isTextureTargetEnabled(unsigned int unit, const TextureType type) const;
  
      LightModelParameters &lightModelParameters();
      const LightModelParameters &lightModelParameters() const;
  
      LightParameters &lightParameters(unsigned int light);
      const LightParameters &lightParameters(unsigned int light) const;
  
      MaterialParameters &materialParameters();
      const MaterialParameters &materialParameters() const;
      bool isColorMaterialEnabled() const;
  
      void setShadeModel(ShadingModel model);
  
      void setClipPlane(unsigned int plane, const GLfloat *equation);
      void getClipPlane(unsigned int plane, GLfloat *equation) const;
  
      FogParameters &fogParameters();
      const FogParameters &fogParameters() const;
  
      TextureEnvironmentParameters &textureEnvironment(unsigned int unit);
      const TextureEnvironmentParameters &textureEnvironment(unsigned int unit) const;
  
      PointParameters &pointParameters();
      const PointParameters &pointParameters() const;
  
    private:
      friend class State;
      friend class GLES1Renderer;
  
      // Back pointer for reading from State.
      const State *mGLState;
  
      // All initial state values come from the
      // OpenGL ES 1.1 spec.
      std::vector<angle::PackedEnumBitSet<TextureType>> mTexUnitEnables;
  
      // Table 6.4, 6.5 (IsEnabled)
      bool mVertexArrayEnabled;
      bool mNormalArrayEnabled;
      bool mColorArrayEnabled;
      bool mPointSizeArrayEnabled;
      std::vector<bool> mTexCoordArrayEnabled;
  
      // Table 6.7-6.16 (IsEnabled)
      bool mLineSmoothEnabled;
      bool mPointSmoothEnabled;
      bool mPointSpriteEnabled;
      bool mAlphaTestEnabled;
      bool mLogicOpEnabled;
      bool mLightingEnabled;
      bool mFogEnabled;
      bool mRescaleNormalEnabled;
      bool mNormalizeEnabled;
      bool mColorMaterialEnabled;
      bool mReflectionMapEnabled;
  
      // Table 6.3
      ColorF mCurrentColor;
      angle::Vector3 mCurrentNormal;
      // Invariant: mCurrentTextureCoords size is == GL_MAX_TEXTURE_UNITS.
      std::vector<TextureCoordF> mCurrentTextureCoords;
  
      // Table 6.4
      unsigned int mClientActiveTexture;
  
      // Table 6.7
      MatrixType mMatrixMode;
      MatrixStack mProjectionMatrices;
      MatrixStack mModelviewMatrices;
      std::vector<MatrixStack> mTextureMatrices;
  
      // Table 6.15
      using TextureEnvironments = std::vector<TextureEnvironmentParameters>;
      TextureEnvironments mTextureEnvironments;
  
      // Table 6.9, 2.8
      MaterialParameters mMaterial;
      LightModelParameters mLightModel;
  
      // Table 6.10
      std::vector<LightParameters> mLights;
  
      // Table 6.8
      FogParameters mFog;
      ShadingModel mShadeModel;
  
      // Table 6.11
      PointParameters mPointParameters;
  
      // Table 6.16
      AlphaTestFunc mAlphaTestFunc;
      GLfloat mAlphaTestRef;
      LogicalOperation mLogicOp;
  
      // Table 6.7
      std::vector<ClipPlaneParameters> mClipPlanes;
  
      // Table 6.19
      HintSetting mLineSmoothHint;
      HintSetting mPointSmoothHint;
      HintSetting mPerspectiveCorrectionHint;
      HintSetting mFogHint;
  };
  
  }  // namespace gl
  
  #endif  // LIBANGLE_GLES1STATE_H_
  

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