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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkMatrix44_DEFINED
#define SkMatrix44_DEFINED
#include "SkMatrix.h"
#include "SkScalar.h"
#ifdef SK_MSCALAR_IS_DOUBLE
typedef double SkMScalar;
static inline double SkFloatToMScalar(float x) {
return static_cast<double>(x);
}
static inline float SkMScalarToFloat(double x) {
return static_cast<float>(x);
}
static inline double SkDoubleToMScalar(double x) {
return x;
}
static inline double SkMScalarToDouble(double x) {
return x;
}
static const SkMScalar SK_MScalarPI = 3.141592653589793;
#else
typedef float SkMScalar;
static inline float SkFloatToMScalar(float x) {
return x;
}
static inline float SkMScalarToFloat(float x) {
return x;
}
static inline float SkDoubleToMScalar(double x) {
return static_cast<float>(x);
}
static inline double SkMScalarToDouble(float x) {
return static_cast<double>(x);
}
static const SkMScalar SK_MScalarPI = 3.14159265f;
#endif
#ifdef SK_SCALAR_IS_FLOAT
#define SkMScalarToScalar SkMScalarToFloat
#define SkScalarToMScalar SkFloatToMScalar
#else
#if SK_MSCALAR_IS_DOUBLE
// we don't have fixed <-> double macros, use double<->scalar macros
#define SkMScalarToScalar SkDoubleToScalar
#define SkScalarToMScalar SkScalarToDouble
#else
#define SkMScalarToScalar SkFloatToFixed
#define SkScalarToMScalar SkFixedToFloat
#endif
#endif
static const SkMScalar SK_MScalar1 = 1;
///////////////////////////////////////////////////////////////////////////////
struct SkVector4 {
SkScalar fData[4];
SkVector4() {
this->set(0, 0, 0, 1);
}
SkVector4(const SkVector4& src) {
memcpy(fData, src.fData, sizeof(fData));
}
SkVector4(SkScalar x, SkScalar y, SkScalar z, SkScalar w = SK_Scalar1) {
fData[0] = x;
fData[1] = y;
fData[2] = z;
fData[3] = w;
}
SkVector4& operator=(const SkVector4& src) {
memcpy(fData, src.fData, sizeof(fData));
return *this;
}
bool operator==(const SkVector4& v) {
return fData[0] == v.fData[0] && fData[1] == v.fData[1] &&
fData[2] == v.fData[2] && fData[3] == v.fData[3];
}
bool operator!=(const SkVector4& v) {
return !(*this == v);
}
bool equals(SkScalar x, SkScalar y, SkScalar z, SkScalar w = SK_Scalar1) {
return fData[0] == x && fData[1] == y &&
fData[2] == z && fData[3] == w;
}
void set(SkScalar x, SkScalar y, SkScalar z, SkScalar w = SK_Scalar1) {
fData[0] = x;
fData[1] = y;
fData[2] = z;
fData[3] = w;
}
};
class SK_API SkMatrix44 {
public:
SkMatrix44();
SkMatrix44(const SkMatrix44&);
SkMatrix44(const SkMatrix44& a, const SkMatrix44& b);
SkMatrix44& operator=(const SkMatrix44& src) {
memcpy(this, &src, sizeof(*this));
return *this;
}
bool operator==(const SkMatrix44& other) const {
return !memcmp(this, &other, sizeof(*this));
}
bool operator!=(const SkMatrix44& other) const {
return !!memcmp(this, &other, sizeof(*this));
}
SkMatrix44(const SkMatrix&);
SkMatrix44& operator=(const SkMatrix& src);
operator SkMatrix() const;
SkMScalar get(int row, int col) const;
void set(int row, int col, const SkMScalar& value);
void asColMajorf(float[]) const;
void asColMajord(double[]) const;
void asRowMajorf(float[]) const;
void asRowMajord(double[]) const;
bool isIdentity() const;
void setIdentity();
void reset() { this->setIdentity();}
void set3x3(SkMScalar m00, SkMScalar m01, SkMScalar m02,
SkMScalar m10, SkMScalar m11, SkMScalar m12,
SkMScalar m20, SkMScalar m21, SkMScalar m22);
void setTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz);
void preTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz);
void postTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz);
void setScale(SkMScalar sx, SkMScalar sy, SkMScalar sz);
void preScale(SkMScalar sx, SkMScalar sy, SkMScalar sz);
void postScale(SkMScalar sx, SkMScalar sy, SkMScalar sz);
void setScale(SkMScalar scale) {
this->setScale(scale, scale, scale);
}
void preScale(SkMScalar scale) {
this->preScale(scale, scale, scale);
}
void postScale(SkMScalar scale) {
this->postScale(scale, scale, scale);
}
void setRotateDegreesAbout(SkMScalar x, SkMScalar y, SkMScalar z,
SkMScalar degrees) {
this->setRotateAbout(x, y, z, degrees * SK_MScalarPI / 180);
}
/** Rotate about the vector [x,y,z]. If that vector is not unit-length,
it will be automatically resized.
*/
void setRotateAbout(SkMScalar x, SkMScalar y, SkMScalar z,
SkMScalar radians);
/** Rotate about the vector [x,y,z]. Does not check the length of the
vector, assuming it is unit-length.
*/
void setRotateAboutUnit(SkMScalar x, SkMScalar y, SkMScalar z,
SkMScalar radians);
void setConcat(const SkMatrix44& a, const SkMatrix44& b);
void preConcat(const SkMatrix44& m) {
this->setConcat(*this, m);
}
void postConcat(const SkMatrix44& m) {
this->setConcat(m, *this);
}
friend SkMatrix44 operator*(const SkMatrix44& a, const SkMatrix44& b) {
return SkMatrix44(a, b);
}
/** If this is invertible, return that in inverse and return true. If it is
not invertible, return false and ignore the inverse parameter.
*/
bool invert(SkMatrix44* inverse) const;
/** Apply the matrix to the src vector, returning the new vector in dst.
It is legal for src and dst to point to the same memory.
*/
void map(const SkScalar src[4], SkScalar dst[4]) const;
void map(SkScalar vec[4]) const {
this->map(vec, vec);
}
friend SkVector4 operator*(const SkMatrix44& m, const SkVector4& src) {
SkVector4 dst;
m.map(src.fData, dst.fData);
return dst;
}
void dump() const;
private:
/* Stored in the same order as opengl:
[3][0] = tx
[3][1] = ty
[3][2] = tz
*/
SkMScalar fMat[4][4];
double determinant() const;
};
#endif
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