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

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• Author : Lingfeng Yang
  Date : 2018-04-04 09:25:48
  Hash : d2488aba
  Message : GLES1: glMatrixMode BUG=angleproject:2306 Change-Id: I83e15990c10d9354c2db00766ddc7b0ab960aa5c Reviewed-on: https://chromium-review.googlesource.com/996019 Commit-Queue: Lingfeng Yang <lfy@google.com> Reviewed-by: Corentin Wallez <cwallez@chromium.org>

• 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/angleutils.h"
  #include "common/matrix_utils.h"
  #include "common/vector_utils.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 envMode      = 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 envColor    = {0.0f, 0.0f, 0.0f, 0.0f};
      GLfloat rgbScale   = 1.0f;
      GLfloat alphaScale = 1.0f;
  
      bool pointSpriteCoordReplace = false;
  };
  
  struct PointParameters
  {
      GLfloat pointSizeMin;
      GLfloat pointSizeMax;
      GLfloat pointFadeThresholdSize;
      angle::Vector3 pointDistanceAttenuation;
      GLfloat pointSize;
  };
  
  class Context;
  class State;
  class GLES1State final : angle::NonCopyable
  {
    public:
      GLES1State();
      ~GLES1State();
  
      void initialize(const Context *context);
  
      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;
  
    private:
      friend class State;
  
      // All initial state values come from the
      // OpenGL ES 1.1 spec.
      struct TextureEnables
      {
          bool enable2D      = false;
          bool enableCubeMap = false;
      };
      std::vector<TextureEnables> 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)
      std::vector<bool> mClipPlaneEnabled;
      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
      using MatrixStack = std::vector<angle::Mat4>;
      MatrixType mMatrixMode;
      MatrixStack mProjMatrices;
      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<angle::Vector4> mClipPlanes;
  
      // Table 6.19
      HintSetting mLineSmoothHint;
      HintSetting mPointSmoothHint;
      HintSetting mPerspectiveCorrectionHint;
      HintSetting mFogHint;
  };
  
  }  // namespace gl
  
  #endif  // LIBANGLE_GLES1STATE_H_