diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/include/utils/SkCamera.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/include/utils/SkCamera.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,153 @@
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+//  Inspired by Rob Johnson's most excellent QuickDraw GX sample code
+
+#ifndef SkCamera_DEFINED
+#define SkCamera_DEFINED
+
+#include "SkMatrix.h"
+
+class SkCanvas;
+
+struct SkUnit3D {
+    SkScalar fX, fY, fZ;
+
+    void set(SkScalar x, SkScalar y, SkScalar z) {
+        fX = x; fY = y; fZ = z;
+    }
+    static SkScalar Dot(const SkUnit3D&, const SkUnit3D&);
+    static void Cross(const SkUnit3D&, const SkUnit3D&, SkUnit3D* cross);
+};
+
+struct SkPoint3D {
+    SkScalar    fX, fY, fZ;
+
+    void set(SkScalar x, SkScalar y, SkScalar z) {
+        fX = x; fY = y; fZ = z;
+    }
+    SkScalar    normalize(SkUnit3D*) const;
+};
+typedef SkPoint3D SkVector3D;
+
+struct SkMatrix3D {
+    SkScalar    fMat[3][4];
+
+    void reset();
+
+    void setRow(int row, SkScalar a, SkScalar b, SkScalar c, SkScalar d = 0) {
+        SkASSERT((unsigned)row < 3);
+        fMat[row][0] = a;
+        fMat[row][1] = b;
+        fMat[row][2] = c;
+        fMat[row][3] = d;
+    }
+
+    void setRotateX(SkScalar deg);
+    void setRotateY(SkScalar deg);
+    void setRotateZ(SkScalar deg);
+    void setTranslate(SkScalar x, SkScalar y, SkScalar z);
+
+    void preRotateX(SkScalar deg);
+    void preRotateY(SkScalar deg);
+    void preRotateZ(SkScalar deg);
+    void preTranslate(SkScalar x, SkScalar y, SkScalar z);
+
+    void setConcat(const SkMatrix3D& a, const SkMatrix3D& b);
+    void mapPoint(const SkPoint3D& src, SkPoint3D* dst) const;
+    void mapVector(const SkVector3D& src, SkVector3D* dst) const;
+
+    void mapPoint(SkPoint3D* v) const {
+        this->mapPoint(*v, v);
+    }
+
+    void mapVector(SkVector3D* v) const {
+        this->mapVector(*v, v);
+    }
+};
+
+class SkPatch3D {
+public:
+    SkPatch3D();
+
+    void    reset();
+    void    transform(const SkMatrix3D&, SkPatch3D* dst = NULL) const;
+
+    // dot a unit vector with the patch's normal
+    SkScalar dotWith(SkScalar dx, SkScalar dy, SkScalar dz) const;
+    SkScalar dotWith(const SkVector3D& v) const {
+        return this->dotWith(v.fX, v.fY, v.fZ);
+    }
+
+    // deprecated, but still here for animator (for now)
+    void rotate(SkScalar x, SkScalar y, SkScalar z) {}
+    void rotateDegrees(SkScalar x, SkScalar y, SkScalar z) {}
+
+private:
+public: // make public for SkDraw3D for now
+    SkVector3D  fU, fV;
+    SkPoint3D   fOrigin;
+
+    friend class SkCamera3D;
+};
+
+class SkCamera3D {
+public:
+    SkCamera3D();
+
+    void reset();
+    void update();
+    void patchToMatrix(const SkPatch3D&, SkMatrix* matrix) const;
+
+    SkPoint3D   fLocation;
+    SkPoint3D   fAxis;
+    SkPoint3D   fZenith;
+    SkPoint3D   fObserver;
+
+private:
+    mutable SkMatrix    fOrientation;
+    mutable bool        fNeedToUpdate;
+
+    void doUpdate() const;
+};
+
+class Sk3DView : SkNoncopyable {
+public:
+    Sk3DView();
+    ~Sk3DView();
+
+    void save();
+    void restore();
+
+    void translate(SkScalar x, SkScalar y, SkScalar z);
+    void rotateX(SkScalar deg);
+    void rotateY(SkScalar deg);
+    void rotateZ(SkScalar deg);
+
+#ifdef SK_BUILD_FOR_ANDROID
+    void setCameraLocation(SkScalar x, SkScalar y, SkScalar z);
+    SkScalar getCameraLocationX();
+    SkScalar getCameraLocationY();
+    SkScalar getCameraLocationZ();
+#endif
+
+    void getMatrix(SkMatrix*) const;
+    void applyToCanvas(SkCanvas*) const;
+
+    SkScalar dotWithNormal(SkScalar dx, SkScalar dy, SkScalar dz) const;
+
+private:
+    struct Rec {
+        Rec*        fNext;
+        SkMatrix3D  fMatrix;
+    };
+    Rec*        fRec;
+    Rec         fInitialRec;
+    SkCamera3D  fCamera;
+};
+
+#endif