move into utils
git-svn-id: http://skia.googlecode.com/svn/trunk@1563 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/utils/SkMatrix44.h b/include/utils/SkMatrix44.h
new file mode 100644
index 0000000..af632d7
--- /dev/null
+++ b/include/utils/SkMatrix44.h
@@ -0,0 +1,215 @@
+/*
+ Copyright 2011 Google Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+
+#ifndef SkMatrix44_DEFINED
+#define SkMatrix44_DEFINED
+
+#include "SkMatrix.h"
+#include "SkScalar.h"
+
+// uncomment this to use doubles for matrix44
+#define SK_MSCALAR_IS_DOUBLE
+
+#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
+
+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 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);
+
+ 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