The Tor Browser: gfx/skia/trunk/src/utils/SkCamera.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/utils/SkCamera.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/utils/SkCamera.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * 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.
  */
 #include "SkCamera.h"
 static SkScalar SkScalarDotDiv(int count, const SkScalar a[], int step_a,
                                const SkScalar b[], int step_b,
                                SkScalar denom) {
     SkScalar prod = 0;
     for (int i = 0; i < count; i++) {
         prod += a[0] * b[0];
         a += step_a;
         b += step_b;
     }
     return prod / denom;
 }
 static SkScalar SkScalarDot(int count, const SkScalar a[], int step_a,
                                        const SkScalar b[], int step_b) {
     SkScalar prod = 0;
     for (int i = 0; i < count; i++) {
         prod += a[0] * b[0];
         a += step_a;
         b += step_b;
     }
     return prod;
 }
 ///////////////////////////////////////////////////////////////////////////////
 SkScalar SkPoint3D::normalize(SkUnit3D* unit) const {
     SkScalar mag = SkScalarSqrt(fX*fX + fY*fY + fZ*fZ);
     if (mag) {
         SkScalar scale = SkScalarInvert(mag);
         unit->fX = fX * scale;
         unit->fY = fY * scale;
         unit->fZ = fZ * scale;
     } else {
         unit->fX = unit->fY = unit->fZ = 0;
     }
     return mag;
 }
 SkScalar SkUnit3D::Dot(const SkUnit3D& a, const SkUnit3D& b) {
     return a.fX * b.fX + a.fY * b.fY + a.fZ * b.fZ;
 }
 void SkUnit3D::Cross(const SkUnit3D& a, const SkUnit3D& b, SkUnit3D* cross) {
     SkASSERT(cross);
     // use x,y,z, in case &a == cross or &b == cross
     SkScalar x = a.fY * b.fZ - a.fZ * b.fY;
     SkScalar y = a.fZ * b.fX - a.fX * b.fY;
     SkScalar z = a.fX * b.fY - a.fY * b.fX;
     cross->set(x, y, z);
 }
 ///////////////////////////////////////////////////////////////////////////////
 SkPatch3D::SkPatch3D() {
     this->reset();
 }
 void SkPatch3D::reset() {
     fOrigin.set(0, 0, 0);
     fU.set(SK_Scalar1, 0, 0);
     fV.set(0, -SK_Scalar1, 0);
 }
 void SkPatch3D::transform(const SkMatrix3D& m, SkPatch3D* dst) const {
     if (dst == NULL) {
         dst = (SkPatch3D*)this;
     }
     m.mapVector(fU, &dst->fU);
     m.mapVector(fV, &dst->fV);
     m.mapPoint(fOrigin, &dst->fOrigin);
 }
 SkScalar SkPatch3D::dotWith(SkScalar dx, SkScalar dy, SkScalar dz) const {
     SkScalar cx = SkScalarMul(fU.fY, fV.fZ) - SkScalarMul(fU.fZ, fV.fY);
     SkScalar cy = SkScalarMul(fU.fZ, fV.fX) - SkScalarMul(fU.fX, fV.fY);
     SkScalar cz = SkScalarMul(fU.fX, fV.fY) - SkScalarMul(fU.fY, fV.fX);
     return SkScalarMul(cx, dx) + SkScalarMul(cy, dy) + SkScalarMul(cz, dz);
 }
 ///////////////////////////////////////////////////////////////////////////////
 void SkMatrix3D::reset() {
     memset(fMat, 0, sizeof(fMat));
     fMat[0][0] = fMat[1][1] = fMat[2][2] = SK_Scalar1;
 }
 void SkMatrix3D::setTranslate(SkScalar x, SkScalar y, SkScalar z) {
     memset(fMat, 0, sizeof(fMat));
     fMat[0][0] = x;
     fMat[1][1] = y;
     fMat[2][2] = z;
 }
 void SkMatrix3D::setRotateX(SkScalar degX) {
     SkScalar    s, c;
     s = SkScalarSinCos(SkDegreesToRadians(degX), &c);
     this->setRow(0, SK_Scalar1, 0, 0);
     this->setRow(1, 0, c, -s);
     this->setRow(2, 0, s, c);
 }
 void SkMatrix3D::setRotateY(SkScalar degY) {
     SkScalar    s, c;
     s = SkScalarSinCos(SkDegreesToRadians(degY), &c);
     this->setRow(0, c, 0, -s);
     this->setRow(1, 0, SK_Scalar1, 0);
     this->setRow(2, s, 0, c);
 }
 void SkMatrix3D::setRotateZ(SkScalar degZ) {
     SkScalar    s, c;
     s = SkScalarSinCos(SkDegreesToRadians(degZ), &c);
     this->setRow(0, c, -s, 0);
     this->setRow(1, s, c, 0);
     this->setRow(2, 0, 0, SK_Scalar1);
 }
 void SkMatrix3D::preTranslate(SkScalar x, SkScalar y, SkScalar z) {
     SkScalar col[3] = { x, y, z};
     for (int i = 0; i < 3; i++) {
         fMat[i][3] += SkScalarDot(3, &fMat[i][0], 1, col, 1);
     }
 }
 void SkMatrix3D::preRotateX(SkScalar degX) {
     SkMatrix3D m;
     m.setRotateX(degX);
     this->setConcat(*this, m);
 }
 void SkMatrix3D::preRotateY(SkScalar degY) {
     SkMatrix3D m;
     m.setRotateY(degY);
     this->setConcat(*this, m);
 }
 void SkMatrix3D::preRotateZ(SkScalar degZ) {
     SkMatrix3D m;
     m.setRotateZ(degZ);
     this->setConcat(*this, m);
 }
 void SkMatrix3D::setConcat(const SkMatrix3D& a, const SkMatrix3D& b) {
     SkMatrix3D  tmp;
     SkMatrix3D* c = this;
     if (this == &a || this == &b) {
         c = &tmp;
     }
     for (int i = 0; i < 3; i++) {
         for (int j = 0; j < 3; j++) {
             c->fMat[i][j] = SkScalarDot(3, &a.fMat[i][0], 1, &b.fMat[0][j], 4);
         }
         c->fMat[i][3] = SkScalarDot(3, &a.fMat[i][0], 1,
                                     &b.fMat[0][3], 4) + a.fMat[i][3];
     }
     if (c == &tmp) {
         *this = tmp;
     }
 }
 void SkMatrix3D::mapPoint(const SkPoint3D& src, SkPoint3D* dst) const {
     SkScalar x = SkScalarDot(3, &fMat[0][0], 1, &src.fX, 1) + fMat[0][3];
     SkScalar y = SkScalarDot(3, &fMat[1][0], 1, &src.fX, 1) + fMat[1][3];
     SkScalar z = SkScalarDot(3, &fMat[2][0], 1, &src.fX, 1) + fMat[2][3];
     dst->set(x, y, z);
 }
 void SkMatrix3D::mapVector(const SkVector3D& src, SkVector3D* dst) const {
     SkScalar x = SkScalarDot(3, &fMat[0][0], 1, &src.fX, 1);
     SkScalar y = SkScalarDot(3, &fMat[1][0], 1, &src.fX, 1);
     SkScalar z = SkScalarDot(3, &fMat[2][0], 1, &src.fX, 1);
     dst->set(x, y, z);
 }
 ///////////////////////////////////////////////////////////////////////////////
 SkCamera3D::SkCamera3D() {
     this->reset();
 }
 void SkCamera3D::reset() {
     fLocation.set(0, 0, -SkIntToScalar(576));   // 8 inches backward
     fAxis.set(0, 0, SK_Scalar1);                // forward
     fZenith.set(0, -SK_Scalar1, 0);             // up
     fObserver.set(0, 0, fLocation.fZ);
     fNeedToUpdate = true;
 }
 void SkCamera3D::update() {
     fNeedToUpdate = true;
 }
 void SkCamera3D::doUpdate() const {
     SkUnit3D    axis, zenith, cross;
     fAxis.normalize(&axis);
     {
         SkScalar dot = SkUnit3D::Dot(*SkTCast<const SkUnit3D*>(&fZenith), axis);
         zenith.fX = fZenith.fX - dot * axis.fX;
         zenith.fY = fZenith.fY - dot * axis.fY;
         zenith.fZ = fZenith.fZ - dot * axis.fZ;
         SkTCast<SkPoint3D*>(&zenith)->normalize(&zenith);
     }
     SkUnit3D::Cross(axis, zenith, &cross);
     {
         SkMatrix* orien = &fOrientation;
         SkScalar x = fObserver.fX;
         SkScalar y = fObserver.fY;
         SkScalar z = fObserver.fZ;
         orien->set(SkMatrix::kMScaleX, x * axis.fX - z * cross.fX);
         orien->set(SkMatrix::kMSkewX,  x * axis.fY - z * cross.fY);
         orien->set(SkMatrix::kMTransX, x * axis.fZ - z * cross.fZ);
         orien->set(SkMatrix::kMSkewY,  y * axis.fX - z * zenith.fX);
         orien->set(SkMatrix::kMScaleY, y * axis.fY - z * zenith.fY);
         orien->set(SkMatrix::kMTransY, y * axis.fZ - z * zenith.fZ);
         orien->set(SkMatrix::kMPersp0, axis.fX);
         orien->set(SkMatrix::kMPersp1, axis.fY);
         orien->set(SkMatrix::kMPersp2, axis.fZ);
     }
 }
 void SkCamera3D::patchToMatrix(const SkPatch3D& quilt, SkMatrix* matrix) const {
     if (fNeedToUpdate) {
         this->doUpdate();
         fNeedToUpdate = false;
     }
     const SkScalar* mapPtr = (const SkScalar*)(const void*)&fOrientation;
     const SkScalar* patchPtr;
     SkPoint3D       diff;
     SkScalar        dot;
     diff.fX = quilt.fOrigin.fX - fLocation.fX;
     diff.fY = quilt.fOrigin.fY - fLocation.fY;
     diff.fZ = quilt.fOrigin.fZ - fLocation.fZ;
     dot = SkUnit3D::Dot(*SkTCast<const SkUnit3D*>(&diff),
                         *SkTCast<const SkUnit3D*>(SkTCast<const SkScalar*>(&fOrientation) + 6));
     patchPtr = (const SkScalar*)&quilt;
     matrix->set(SkMatrix::kMScaleX, SkScalarDotDiv(3, patchPtr, 1, mapPtr, 1, dot));
     matrix->set(SkMatrix::kMSkewY,  SkScalarDotDiv(3, patchPtr, 1, mapPtr+3, 1, dot));
     matrix->set(SkMatrix::kMPersp0, SkScalarDotDiv(3, patchPtr, 1, mapPtr+6, 1, dot));
     patchPtr += 3;
     matrix->set(SkMatrix::kMSkewX,  SkScalarDotDiv(3, patchPtr, 1, mapPtr, 1, dot));
     matrix->set(SkMatrix::kMScaleY, SkScalarDotDiv(3, patchPtr, 1, mapPtr+3, 1, dot));
     matrix->set(SkMatrix::kMPersp1, SkScalarDotDiv(3, patchPtr, 1, mapPtr+6, 1, dot));
     patchPtr = (const SkScalar*)(const void*)&diff;
     matrix->set(SkMatrix::kMTransX, SkScalarDotDiv(3, patchPtr, 1, mapPtr, 1, dot));
     matrix->set(SkMatrix::kMTransY, SkScalarDotDiv(3, patchPtr, 1, mapPtr+3, 1, dot));
     matrix->set(SkMatrix::kMPersp2, SK_Scalar1);
 }
 ///////////////////////////////////////////////////////////////////////////////
 Sk3DView::Sk3DView() {
     fInitialRec.fMatrix.reset();
     fRec = &fInitialRec;
 }
 Sk3DView::~Sk3DView() {
     Rec* rec = fRec;
     while (rec != &fInitialRec) {
         Rec* next = rec->fNext;
         SkDELETE(rec);
         rec = next;
     }
 }
 void Sk3DView::save() {
     Rec* rec = SkNEW(Rec);
     rec->fNext = fRec;
     rec->fMatrix = fRec->fMatrix;
     fRec = rec;
 }
 void Sk3DView::restore() {
     SkASSERT(fRec != &fInitialRec);
     Rec* next = fRec->fNext;
     SkDELETE(fRec);
     fRec = next;
 }
 #ifdef SK_BUILD_FOR_ANDROID
 void Sk3DView::setCameraLocation(SkScalar x, SkScalar y, SkScalar z) {
     // the camera location is passed in inches, set in pt
     SkScalar lz = z * 72.0f;
     fCamera.fLocation.set(x * 72.0f, y * 72.0f, lz);
     fCamera.fObserver.set(0, 0, lz);
     fCamera.update();
 }
 SkScalar Sk3DView::getCameraLocationX() {
     return fCamera.fLocation.fX / 72.0f;
 }
 SkScalar Sk3DView::getCameraLocationY() {
     return fCamera.fLocation.fY / 72.0f;
 }
 SkScalar Sk3DView::getCameraLocationZ() {
     return fCamera.fLocation.fZ / 72.0f;
 }
 #endif
 void Sk3DView::translate(SkScalar x, SkScalar y, SkScalar z) {
     fRec->fMatrix.preTranslate(x, y, z);
 }
 void Sk3DView::rotateX(SkScalar deg) {
     fRec->fMatrix.preRotateX(deg);
 }
 void Sk3DView::rotateY(SkScalar deg) {
     fRec->fMatrix.preRotateY(deg);
 }
 void Sk3DView::rotateZ(SkScalar deg) {
     fRec->fMatrix.preRotateZ(deg);
 }
 SkScalar Sk3DView::dotWithNormal(SkScalar x, SkScalar y, SkScalar z) const {
     SkPatch3D   patch;
     patch.transform(fRec->fMatrix);
     return patch.dotWith(x, y, z);
 }
 void Sk3DView::getMatrix(SkMatrix* matrix) const {
     if (matrix != NULL) {
         SkPatch3D   patch;
         patch.transform(fRec->fMatrix);
         fCamera.patchToMatrix(patch, matrix);
     }
 }
 #include "SkCanvas.h"
 void Sk3DView::applyToCanvas(SkCanvas* canvas) const {
     SkMatrix    matrix;
     this->getMatrix(&matrix);
     canvas->concat(matrix);
 }

The Tor Browser / annotate

gfx/skia/trunk/src/utils/SkCamera.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/utils/SkCamera.cpp