180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/* 280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru * Copyright 2011 Google Inc. 380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru * 480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru * Use of this source code is governed by a BSD-style license that can be 580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru * found in the LICENSE file. 680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru */ 780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#ifndef SkMatrix44_DEFINED 980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#define SkMatrix44_DEFINED 1080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#include "SkMatrix.h" 1280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#include "SkScalar.h" 1380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#ifdef SK_MSCALAR_IS_DOUBLE 15363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#ifdef SK_MSCALAR_IS_FLOAT 16363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger #error "can't define MSCALAR both as DOUBLE and FLOAT" 17363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#endif 1880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru typedef double SkMScalar; 19363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 2080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static inline double SkFloatToMScalar(float x) { 2180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return static_cast<double>(x); 2280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 2380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static inline float SkMScalarToFloat(double x) { 2480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return static_cast<float>(x); 2580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 2680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static inline double SkDoubleToMScalar(double x) { 2780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return x; 2880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 2980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static inline double SkMScalarToDouble(double x) { 3080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return x; 3180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 3280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static const SkMScalar SK_MScalarPI = 3.141592653589793; 33363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#elif defined SK_MSCALAR_IS_FLOAT 34363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#ifdef SK_MSCALAR_IS_DOUBLE 35363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger #error "can't define MSCALAR both as DOUBLE and FLOAT" 36363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#endif 3780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru typedef float SkMScalar; 38363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 3980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static inline float SkFloatToMScalar(float x) { 4080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return x; 4180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 4280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static inline float SkMScalarToFloat(float x) { 4380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return x; 4480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 4580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static inline float SkDoubleToMScalar(double x) { 4680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return static_cast<float>(x); 4780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 4880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static inline double SkMScalarToDouble(float x) { 4980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return static_cast<double>(x); 5080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 5180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru static const SkMScalar SK_MScalarPI = 3.14159265f; 5280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#endif 5380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 54363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#define SkMScalarToScalar SkMScalarToFloat 55363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#define SkScalarToMScalar SkFloatToMScalar 5680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 5780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Querustatic const SkMScalar SK_MScalar1 = 1; 5880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 5980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/////////////////////////////////////////////////////////////////////////////// 6080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 6180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Querustruct SkVector4 { 6280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkScalar fData[4]; 6380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 6480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkVector4() { 6580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru this->set(0, 0, 0, 1); 6680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 6780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkVector4(const SkVector4& src) { 6880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru memcpy(fData, src.fData, sizeof(fData)); 6980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 7080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkVector4(SkScalar x, SkScalar y, SkScalar z, SkScalar w = SK_Scalar1) { 7180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[0] = x; 7280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[1] = y; 7380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[2] = z; 7480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[3] = w; 7580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 7680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 7780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkVector4& operator=(const SkVector4& src) { 7880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru memcpy(fData, src.fData, sizeof(fData)); 7980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return *this; 8080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 8180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 8280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru bool operator==(const SkVector4& v) { 8380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return fData[0] == v.fData[0] && fData[1] == v.fData[1] && 8480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[2] == v.fData[2] && fData[3] == v.fData[3]; 8580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 8680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru bool operator!=(const SkVector4& v) { 8780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return !(*this == v); 8880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 8980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru bool equals(SkScalar x, SkScalar y, SkScalar z, SkScalar w = SK_Scalar1) { 9080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return fData[0] == x && fData[1] == y && 9180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[2] == z && fData[3] == w; 9280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 9380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 9480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void set(SkScalar x, SkScalar y, SkScalar z, SkScalar w = SK_Scalar1) { 9580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[0] = x; 9680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[1] = y; 9780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[2] = z; 9880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fData[3] = w; 9980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 10080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru}; 10180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 10280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruclass SK_API SkMatrix44 { 10380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Querupublic: 104363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 105363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger enum Uninitialized_Constructor { 106363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger kUninitialized_Constructor 107363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger }; 108363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger enum Identity_Constructor { 109363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger kIdentity_Constructor 110363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger }; 111363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 112363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMatrix44(Uninitialized_Constructor) { } 113363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMatrix44(Identity_Constructor) { this->setIdentity(); } 114363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 1150a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger SK_ATTR_DEPRECATED("use the constructors that take an enum") 116363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMatrix44() { this->setIdentity(); } 117d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger 118d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger SkMatrix44(const SkMatrix44& src) { 119d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger memcpy(fMat, src.fMat, sizeof(fMat)); 120d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger fTypeMask = src.fTypeMask; 121d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger } 122d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger 123d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger SkMatrix44(const SkMatrix44& a, const SkMatrix44& b) { 124d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger this->setConcat(a, b); 125d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger } 12680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 12780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkMatrix44& operator=(const SkMatrix44& src) { 128096defe64d408e54474fe19f418c95bf1a554fc7Derek Sollenberger if (&src != this) { 129096defe64d408e54474fe19f418c95bf1a554fc7Derek Sollenberger memcpy(fMat, src.fMat, sizeof(fMat)); 130096defe64d408e54474fe19f418c95bf1a554fc7Derek Sollenberger fTypeMask = src.fTypeMask; 131096defe64d408e54474fe19f418c95bf1a554fc7Derek Sollenberger } 13280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return *this; 13380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 13480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 135363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger bool operator==(const SkMatrix44& other) const; 13680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru bool operator!=(const SkMatrix44& other) const { 137363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger return !(other == *this); 13880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 13980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1400a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger /* When converting from SkMatrix44 to SkMatrix, the third row and 1410a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger * column is dropped. When converting from SkMatrix to SkMatrix44 1420a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger * the third row and column remain as identity: 1430a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger * [ a b c ] [ a b 0 c ] 1440a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger * [ d e f ] -> [ d e 0 f ] 1450a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger * [ g h i ] [ 0 0 1 0 ] 1460a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger * [ g h 0 i ] 1470a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger */ 14880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkMatrix44(const SkMatrix&); 14980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkMatrix44& operator=(const SkMatrix& src); 15080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru operator SkMatrix() const; 15180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 152363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** 153363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * Return a reference to a const identity matrix 154363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 155363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger static const SkMatrix44& I(); 156363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 157363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger enum TypeMask { 158363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger kIdentity_Mask = 0, 159363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger kTranslate_Mask = 0x01, //!< set if the matrix has translation 160363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger kScale_Mask = 0x02, //!< set if the matrix has any scale != 1 161363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger kAffine_Mask = 0x04, //!< set if the matrix skews or rotates 162363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger kPerspective_Mask = 0x08 //!< set if the matrix is in perspective 163363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger }; 164363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 165363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** 166363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * Returns a bitfield describing the transformations the matrix may 167363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * perform. The bitfield is computed conservatively, so it may include 168363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * false positives. For example, when kPerspective_Mask is true, all 169363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * other bits may be set to true even in the case of a pure perspective 170363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * transform. 171363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 172363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline TypeMask getType() const { 173363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger if (fTypeMask & kUnknown_Mask) { 174363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger fTypeMask = this->computeTypeMask(); 175363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 176363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkASSERT(!(fTypeMask & kUnknown_Mask)); 177363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger return (TypeMask)fTypeMask; 178363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 179363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 180363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** 181363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * Return true if the matrix is identity. 182363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 183363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline bool isIdentity() const { 184363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger return kIdentity_Mask == this->getType(); 185363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 186363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 187363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** 188363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * Return true if the matrix contains translate or is identity. 189363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 190363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline bool isTranslate() const { 191363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger return !(this->getType() & ~kTranslate_Mask); 192363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 193363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 194363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** 195363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * Return true if the matrix only contains scale or translate or is identity. 196363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 197363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline bool isScaleTranslate() const { 198363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger return !(this->getType() & ~(kScale_Mask | kTranslate_Mask)); 199363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 200363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 201363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void setIdentity(); 202363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void reset() { this->setIdentity();} 203363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 204363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** 205363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * get a value from the matrix. The row,col parameters work as follows: 206363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * (0, 0) scale-x 207363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * (0, 3) translate-x 208363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * (3, 0) perspective-x 209363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 210363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline SkMScalar get(int row, int col) const { 211363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkASSERT((unsigned)row <= 3); 212363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkASSERT((unsigned)col <= 3); 213363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger return fMat[col][row]; 214363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 215363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 216363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** 217363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * set a value in the matrix. The row,col parameters work as follows: 218363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * (0, 0) scale-x 219363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * (0, 3) translate-x 220363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * (3, 0) perspective-x 221363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 222363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void set(int row, int col, SkMScalar value) { 223363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkASSERT((unsigned)row <= 3); 224363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkASSERT((unsigned)col <= 3); 225363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger fMat[col][row] = value; 226363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger this->dirtyTypeMask(); 227363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 228363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 229363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline double getDouble(int row, int col) const { 230363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger return SkMScalarToDouble(this->get(row, col)); 231363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 232363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void setDouble(int row, int col, double value) { 233363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger this->set(row, col, SkDoubleToMScalar(value)); 234363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 2350a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger inline float getFloat(int row, int col) const { 2360a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger return SkMScalarToFloat(this->get(row, col)); 2370a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger } 2380a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger inline void setFloat(int row, int col, float value) { 2390a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger this->set(row, col, SkFloatToMScalar(value)); 2400a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger } 24180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 242363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** These methods allow one to efficiently read matrix entries into an 243363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * array. The given array must have room for exactly 16 entries. Whenever 244363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * possible, they will try to use memcpy rather than an entry-by-entry 245363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * copy. 246363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 24780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void asColMajorf(float[]) const; 24880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void asColMajord(double[]) const; 24980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void asRowMajorf(float[]) const; 25080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void asRowMajord(double[]) const; 25180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 252363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** These methods allow one to efficiently set all matrix entries from an 253363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * array. The given array must have room for exactly 16 entries. Whenever 254363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * possible, they will try to use memcpy rather than an entry-by-entry 255363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * copy. 256363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 257363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void setColMajorf(const float[]); 258363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void setColMajord(const double[]); 259363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void setRowMajorf(const float[]); 260363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void setRowMajord(const double[]); 261363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 262363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#ifdef SK_MSCALAR_IS_FLOAT 263363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void setColMajor(const SkMScalar data[]) { this->setColMajorf(data); } 264363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void setRowMajor(const SkMScalar data[]) { this->setRowMajorf(data); } 265363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#else 266363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void setColMajor(const SkMScalar data[]) { this->setColMajord(data); } 267363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void setRowMajor(const SkMScalar data[]) { this->setRowMajord(data); } 268363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#endif 26980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 2700a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger /* This sets the top-left of the matrix and clears the translation and 2710a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger * perspective components (with [3][3] set to 1). */ 27280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void set3x3(SkMScalar m00, SkMScalar m01, SkMScalar m02, 27380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkMScalar m10, SkMScalar m11, SkMScalar m12, 27480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkMScalar m20, SkMScalar m21, SkMScalar m22); 27580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 27680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void setTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz); 27780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void preTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz); 27880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void postTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz); 27980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 28080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void setScale(SkMScalar sx, SkMScalar sy, SkMScalar sz); 28180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void preScale(SkMScalar sx, SkMScalar sy, SkMScalar sz); 28280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void postScale(SkMScalar sx, SkMScalar sy, SkMScalar sz); 28380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 284363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void setScale(SkMScalar scale) { 28580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru this->setScale(scale, scale, scale); 28680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 287363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void preScale(SkMScalar scale) { 28880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru this->preScale(scale, scale, scale); 28980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 290363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void postScale(SkMScalar scale) { 29180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru this->postScale(scale, scale, scale); 29280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 29380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 29480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void setRotateDegreesAbout(SkMScalar x, SkMScalar y, SkMScalar z, 29580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkMScalar degrees) { 29680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru this->setRotateAbout(x, y, z, degrees * SK_MScalarPI / 180); 29780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 29880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 29980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru /** Rotate about the vector [x,y,z]. If that vector is not unit-length, 30080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru it will be automatically resized. 30180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru */ 30280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void setRotateAbout(SkMScalar x, SkMScalar y, SkMScalar z, 30380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkMScalar radians); 30480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru /** Rotate about the vector [x,y,z]. Does not check the length of the 30580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru vector, assuming it is unit-length. 30680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru */ 30780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void setRotateAboutUnit(SkMScalar x, SkMScalar y, SkMScalar z, 30880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkMScalar radians); 30980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 31080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void setConcat(const SkMatrix44& a, const SkMatrix44& b); 311363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void preConcat(const SkMatrix44& m) { 31280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru this->setConcat(*this, m); 31380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 314363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void postConcat(const SkMatrix44& m) { 31580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru this->setConcat(m, *this); 31680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 31780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 31880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru friend SkMatrix44 operator*(const SkMatrix44& a, const SkMatrix44& b) { 31980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return SkMatrix44(a, b); 32080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 32180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 32280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru /** If this is invertible, return that in inverse and return true. If it is 32380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru not invertible, return false and ignore the inverse parameter. 32480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru */ 32580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru bool invert(SkMatrix44* inverse) const; 32680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 327363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** Transpose this matrix in place. */ 328363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void transpose(); 329363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 33080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru /** Apply the matrix to the src vector, returning the new vector in dst. 33180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru It is legal for src and dst to point to the same memory. 33280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru */ 333363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void mapScalars(const SkScalar src[4], SkScalar dst[4]) const; 334363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void mapScalars(SkScalar vec[4]) const { 335363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger this->mapScalars(vec, vec); 336363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 337363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 3380a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger SK_ATTR_DEPRECATED("use mapScalars") 339363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void map(const SkScalar src[4], SkScalar dst[4]) const { 340363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger this->mapScalars(src, dst); 341363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 3420a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger 3430a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger SK_ATTR_DEPRECATED("use mapScalars") 34480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void map(SkScalar vec[4]) const { 345363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger this->mapScalars(vec, vec); 346363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 347363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 348363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#ifdef SK_MSCALAR_IS_DOUBLE 349363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void mapMScalars(const SkMScalar src[4], SkMScalar dst[4]) const; 350363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#elif defined SK_MSCALAR_IS_FLOAT 351363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void mapMScalars(const SkMScalar src[4], SkMScalar dst[4]) const { 352363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger this->mapScalars(src, dst); 353363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 354363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger#endif 355363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void mapMScalars(SkMScalar vec[4]) const { 356363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger this->mapMScalars(vec, vec); 35780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 35880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 35980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru friend SkVector4 operator*(const SkMatrix44& m, const SkVector4& src) { 36080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkVector4 dst; 3610a657bbc2c6fc9daf699942e023050536d5ec95fDerek Sollenberger m.mapScalars(src.fData, dst.fData); 36280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return dst; 36380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 36480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 365363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** 366363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * map an array of [x, y, 0, 1] through the matrix, returning an array 367363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * of [x', y', z', w']. 368363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * 369363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * @param src2 array of [x, y] pairs, with implied z=0 and w=1 370363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * @param count number of [x, y] pairs in src2 371363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * @param dst4 array of [x', y', z', w'] quads as the output. 372363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 373363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void map2(const float src2[], int count, float dst4[]) const; 374363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger void map2(const double src2[], int count, double dst4[]) const; 375363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 37680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru void dump() const; 37780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 378363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger double determinant() const; 379363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 38080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruprivate: 381d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger SkMScalar fMat[4][4]; 382d686ac77c2c485c4a3302eda9c1de597a6f8c568Derek Sollenberger mutable unsigned fTypeMask; 38380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 384363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger enum { 385363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger kUnknown_Mask = 0x80, 386363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 387363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger kAllPublic_Masks = 0xF 388363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger }; 389363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 390363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMScalar transX() const { return fMat[3][0]; } 391363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMScalar transY() const { return fMat[3][1]; } 392363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMScalar transZ() const { return fMat[3][2]; } 393363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 394363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMScalar scaleX() const { return fMat[0][0]; } 395363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMScalar scaleY() const { return fMat[1][1]; } 396363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMScalar scaleZ() const { return fMat[2][2]; } 397363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 398363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMScalar perspX() const { return fMat[0][3]; } 399363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMScalar perspY() const { return fMat[1][3]; } 400363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkMScalar perspZ() const { return fMat[2][3]; } 401363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 402363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger int computeTypeMask() const; 403363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 404363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void dirtyTypeMask() { 405363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger fTypeMask = kUnknown_Mask; 406363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 407363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 408363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline void setTypeMask(int mask) { 409363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger SkASSERT(0 == (~(kAllPublic_Masks | kUnknown_Mask) & mask)); 410363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger fTypeMask = mask; 411363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 412363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger 413363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger /** 414363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * Does not take the time to 'compute' the typemask. Only returns true if 415363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger * we already know that this matrix is identity. 416363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger */ 417363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger inline bool isTriviallyIdentity() const { 418363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger return 0 == fTypeMask; 419363e546ed626b6dbbc42f5db87b3594bc0b5944bDerek Sollenberger } 42080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru}; 42180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 42280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#endif 423