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//
// 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/bitset_utils.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
{
MaterialParameters();
ColorF ambient;
ColorF diffuse;
ColorF specular;
ColorF emissive;
GLfloat specularExponent;
};
struct LightModelParameters
{
LightModelParameters();
ColorF color;
bool twoSided;
};
struct LightParameters
{
LightParameters();
LightParameters(const LightParameters &other);
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
{
FogParameters();
FogMode mode;
GLfloat density;
GLfloat start;
GLfloat end;
ColorF color;
};
struct TextureEnvironmentParameters
{
TextureEnvironmentParameters();
TextureEnvironmentParameters(const TextureEnvironmentParameters &other);
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
{
PointParameters();
PointParameters(const PointParameters &other);
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
{
ClipPlaneParameters();
ClipPlaneParameters(bool enabled, const angle::Vector4 &equation);
ClipPlaneParameters(const ClipPlaneParameters &other);
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;
GLint getCurrentMatrixStackDepth(GLenum param) 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 setLogicOp(LogicalOperation opcodePacked);
void setClientStateEnabled(ClientVertexArrayType clientState, bool enable);
void setTexCoordArrayEnabled(unsigned int unit, 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;
AttributesMask getVertexArraysAttributeMask() const;
void setHint(GLenum target, GLenum mode);
GLenum getHint(GLenum target);
private:
friend class State;
friend class GLES1Renderer;
// Back pointer for reading from State.
const State *mGLState;
enum DirtyGles1Type
{
DIRTY_GLES1_TEXTURE_UNIT_ENABLE = 0,
DIRTY_GLES1_CLIENT_STATE_ENABLE,
DIRTY_GLES1_FEATURE_ENABLE,
DIRTY_GLES1_CURRENT_VECTOR,
DIRTY_GLES1_CLIENT_ACTIVE_TEXTURE,
DIRTY_GLES1_MATRICES,
DIRTY_GLES1_TEXTURE_ENVIRONMENT,
DIRTY_GLES1_MATERIAL,
DIRTY_GLES1_LIGHTS,
DIRTY_GLES1_FOG,
DIRTY_GLES1_SHADE_MODEL,
DIRTY_GLES1_POINT_PARAMETERS,
DIRTY_GLES1_ALPHA_TEST,
DIRTY_GLES1_LOGIC_OP,
DIRTY_GLES1_CLIP_PLANES,
DIRTY_GLES1_HINT_SETTING,
DIRTY_GLES1_MAX,
};
using DirtyBits = angle::BitSet<DIRTY_GLES1_MAX>;
DirtyBits mDirtyBits;
void setDirty(DirtyGles1Type type);
void setAllDirty();
void clearDirty();
bool isDirty(DirtyGles1Type type) const;
// 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_