The Tor Browser: gfx/skia/trunk/src/utils/SkLayer.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/utils/SkLayer.cpp@6474c204b198 (annotated)

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

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkLayer.h"
 #include "SkCanvas.h"
 //#define DEBUG_DRAW_LAYER_BOUNDS
 //#define DEBUG_TRACK_NEW_DELETE
 #ifdef DEBUG_TRACK_NEW_DELETE
     static int gLayerAllocCount;
 #endif
 ///////////////////////////////////////////////////////////////////////////////
 SkLayer::SkLayer() {
     fParent = NULL;
     m_opacity = SK_Scalar1;
     m_size.set(0, 0);
     m_position.set(0, 0);
     m_anchorPoint.set(SK_ScalarHalf, SK_ScalarHalf);
     fMatrix.reset();
     fChildrenMatrix.reset();
     fFlags = 0;
 #ifdef DEBUG_TRACK_NEW_DELETE
     gLayerAllocCount += 1;
     SkDebugf("SkLayer new:    %d\n", gLayerAllocCount);
 #endif
 }
 SkLayer::SkLayer(const SkLayer& src) : INHERITED() {
     fParent = NULL;
     m_opacity = src.m_opacity;
     m_size = src.m_size;
     m_position = src.m_position;
     m_anchorPoint = src.m_anchorPoint;
     fMatrix = src.fMatrix;
     fChildrenMatrix = src.fChildrenMatrix;
     fFlags = src.fFlags;
 #ifdef DEBUG_TRACK_NEW_DELETE
     gLayerAllocCount += 1;
     SkDebugf("SkLayer copy:   %d\n", gLayerAllocCount);
 #endif
 }
 SkLayer::~SkLayer() {
     this->removeChildren();
 #ifdef DEBUG_TRACK_NEW_DELETE
     gLayerAllocCount -= 1;
     SkDebugf("SkLayer delete: %d\n", gLayerAllocCount);
 #endif
 }
 ///////////////////////////////////////////////////////////////////////////////
 bool SkLayer::isInheritFromRootTransform() const {
     return (fFlags & kInheritFromRootTransform_Flag) != 0;
 }
 void SkLayer::setInheritFromRootTransform(bool doInherit) {
     if (doInherit) {
         fFlags |= kInheritFromRootTransform_Flag;
     } else {
         fFlags &= ~kInheritFromRootTransform_Flag;
     }
 }
 void SkLayer::setMatrix(const SkMatrix& matrix) {
     fMatrix = matrix;
 }
 void SkLayer::setChildrenMatrix(const SkMatrix& matrix) {
     fChildrenMatrix = matrix;
 }
 ///////////////////////////////////////////////////////////////////////////////
 int SkLayer::countChildren() const {
     return m_children.count();
 }
 SkLayer* SkLayer::getChild(int index) const {
     if ((unsigned)index < (unsigned)m_children.count()) {
         SkASSERT(m_children[index]->fParent == this);
         return m_children[index];
     }
     return NULL;
 }
 SkLayer* SkLayer::addChild(SkLayer* child) {
     SkASSERT(this != child);
     child->ref();
     child->detachFromParent();
     SkASSERT(child->fParent == NULL);
     child->fParent = this;
     *m_children.append() = child;
     return child;
 }
 void SkLayer::detachFromParent() {
     if (fParent) {
         int index = fParent->m_children.find(this);
         SkASSERT(index >= 0);
         fParent->m_children.remove(index);
         fParent = NULL;
         this->unref();  // this call might delete us
     }
 }
 void SkLayer::removeChildren() {
     int count = m_children.count();
     for (int i = 0; i < count; i++) {
         SkLayer* child = m_children[i];
         SkASSERT(child->fParent == this);
         child->fParent = NULL;  // in case it has more than one owner
         child->unref();
     }
     m_children.reset();
 }
 SkLayer* SkLayer::getRootLayer() const {
     const SkLayer* root = this;
     while (root->fParent != NULL) {
         root = root->fParent;
     }
     return const_cast<SkLayer*>(root);
 }
 ///////////////////////////////////////////////////////////////////////////////
 void SkLayer::getLocalTransform(SkMatrix* matrix) const {
     matrix->setTranslate(m_position.fX, m_position.fY);
     SkScalar tx = SkScalarMul(m_anchorPoint.fX, m_size.width());
     SkScalar ty = SkScalarMul(m_anchorPoint.fY, m_size.height());
     matrix->preTranslate(tx, ty);
     matrix->preConcat(this->getMatrix());
     matrix->preTranslate(-tx, -ty);
 }
 void SkLayer::localToGlobal(SkMatrix* matrix) const {
     this->getLocalTransform(matrix);
     if (this->isInheritFromRootTransform()) {
         matrix->postConcat(this->getRootLayer()->getMatrix());
         return;
     }
     const SkLayer* layer = this;
     while (layer->fParent != NULL) {
         layer = layer->fParent;
         SkMatrix tmp;
         layer->getLocalTransform(&tmp);
         tmp.preConcat(layer->getChildrenMatrix());
         matrix->postConcat(tmp);
     }
 }
 ///////////////////////////////////////////////////////////////////////////////
 void SkLayer::onDraw(SkCanvas*, SkScalar opacity) {
 //    SkDebugf("----- no onDraw for %p\n", this);
 }
 #include "SkString.h"
 void SkLayer::draw(SkCanvas* canvas, SkScalar opacity) {
 #if 0
     SkString str1, str2;
  //   this->getMatrix().toDumpString(&str1);
  //   this->getChildrenMatrix().toDumpString(&str2);
     SkDebugf("--- drawlayer %p opacity %g size [%g %g] pos [%g %g] matrix %s children %s\n",
              this, opacity * this->getOpacity(), m_size.width(), m_size.height(),
              m_position.fX, m_position.fY, str1.c_str(), str2.c_str());
 #endif
     opacity = SkScalarMul(opacity, this->getOpacity());
     if (opacity <= 0) {
 //        SkDebugf("---- abort drawing %p opacity %g\n", this, opacity);
         return;
     }
     SkAutoCanvasRestore acr(canvas, true);
     // apply our local transform
     {
         SkMatrix tmp;
         this->getLocalTransform(&tmp);
         if (this->isInheritFromRootTransform()) {
             // should we also apply the root's childrenMatrix?
             canvas->setMatrix(getRootLayer()->getMatrix());
         }
         canvas->concat(tmp);
     }
     this->onDraw(canvas, opacity);
 #ifdef DEBUG_DRAW_LAYER_BOUNDS
     {
         SkRect r = SkRect::MakeSize(this->getSize());
         SkPaint p;
         p.setAntiAlias(true);
         p.setStyle(SkPaint::kStroke_Style);
         p.setStrokeWidth(SkIntToScalar(2));
         p.setColor(0xFFFF44DD);
         canvas->drawRect(r, p);
         canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p);
         canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p);
     }
 #endif
     int count = this->countChildren();
     if (count > 0) {
         canvas->concat(this->getChildrenMatrix());
         for (int i = 0; i < count; i++) {
             this->getChild(i)->draw(canvas, opacity);
         }
     }
 }

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gfx/skia/trunk/src/utils/SkLayer.cpp@6474c204b198 (annotated)

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