The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/utils/SkLayer.cpp
gfx/skia/trunk/src/utils/SkLayer.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:f6017b08db31 |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 #include "SkLayer.h" | |
| 9 #include "SkCanvas.h" | |
| 10 | |
| 11 //#define DEBUG_DRAW_LAYER_BOUNDS | |
| 12 //#define DEBUG_TRACK_NEW_DELETE | |
| 13 | |
| 14 #ifdef DEBUG_TRACK_NEW_DELETE | |
| 15 static int gLayerAllocCount; | |
| 16 #endif | |
| 17 | |
| 18 /////////////////////////////////////////////////////////////////////////////// | |
| 19 | |
| 20 SkLayer::SkLayer() { | |
| 21 fParent = NULL; | |
| 22 m_opacity = SK_Scalar1; | |
| 23 m_size.set(0, 0); | |
| 24 m_position.set(0, 0); | |
| 25 m_anchorPoint.set(SK_ScalarHalf, SK_ScalarHalf); | |
| 26 | |
| 27 fMatrix.reset(); | |
| 28 fChildrenMatrix.reset(); | |
| 29 fFlags = 0; | |
| 30 | |
| 31 #ifdef DEBUG_TRACK_NEW_DELETE | |
| 32 gLayerAllocCount += 1; | |
| 33 SkDebugf("SkLayer new: %d\n", gLayerAllocCount); | |
| 34 #endif | |
| 35 } | |
| 36 | |
| 37 SkLayer::SkLayer(const SkLayer& src) : INHERITED() { | |
| 38 fParent = NULL; | |
| 39 m_opacity = src.m_opacity; | |
| 40 m_size = src.m_size; | |
| 41 m_position = src.m_position; | |
| 42 m_anchorPoint = src.m_anchorPoint; | |
| 43 | |
| 44 fMatrix = src.fMatrix; | |
| 45 fChildrenMatrix = src.fChildrenMatrix; | |
| 46 fFlags = src.fFlags; | |
| 47 | |
| 48 #ifdef DEBUG_TRACK_NEW_DELETE | |
| 49 gLayerAllocCount += 1; | |
| 50 SkDebugf("SkLayer copy: %d\n", gLayerAllocCount); | |
| 51 #endif | |
| 52 } | |
| 53 | |
| 54 SkLayer::~SkLayer() { | |
| 55 this->removeChildren(); | |
| 56 | |
| 57 #ifdef DEBUG_TRACK_NEW_DELETE | |
| 58 gLayerAllocCount -= 1; | |
| 59 SkDebugf("SkLayer delete: %d\n", gLayerAllocCount); | |
| 60 #endif | |
| 61 } | |
| 62 | |
| 63 /////////////////////////////////////////////////////////////////////////////// | |
| 64 | |
| 65 bool SkLayer::isInheritFromRootTransform() const { | |
| 66 return (fFlags & kInheritFromRootTransform_Flag) != 0; | |
| 67 } | |
| 68 | |
| 69 void SkLayer::setInheritFromRootTransform(bool doInherit) { | |
| 70 if (doInherit) { | |
| 71 fFlags |= kInheritFromRootTransform_Flag; | |
| 72 } else { | |
| 73 fFlags &= ~kInheritFromRootTransform_Flag; | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 void SkLayer::setMatrix(const SkMatrix& matrix) { | |
| 78 fMatrix = matrix; | |
| 79 } | |
| 80 | |
| 81 void SkLayer::setChildrenMatrix(const SkMatrix& matrix) { | |
| 82 fChildrenMatrix = matrix; | |
| 83 } | |
| 84 | |
| 85 /////////////////////////////////////////////////////////////////////////////// | |
| 86 | |
| 87 int SkLayer::countChildren() const { | |
| 88 return m_children.count(); | |
| 89 } | |
| 90 | |
| 91 SkLayer* SkLayer::getChild(int index) const { | |
| 92 if ((unsigned)index < (unsigned)m_children.count()) { | |
| 93 SkASSERT(m_children[index]->fParent == this); | |
| 94 return m_children[index]; | |
| 95 } | |
| 96 return NULL; | |
| 97 } | |
| 98 | |
| 99 SkLayer* SkLayer::addChild(SkLayer* child) { | |
| 100 SkASSERT(this != child); | |
| 101 child->ref(); | |
| 102 child->detachFromParent(); | |
| 103 SkASSERT(child->fParent == NULL); | |
| 104 child->fParent = this; | |
| 105 | |
| 106 *m_children.append() = child; | |
| 107 return child; | |
| 108 } | |
| 109 | |
| 110 void SkLayer::detachFromParent() { | |
| 111 if (fParent) { | |
| 112 int index = fParent->m_children.find(this); | |
| 113 SkASSERT(index >= 0); | |
| 114 fParent->m_children.remove(index); | |
| 115 fParent = NULL; | |
| 116 this->unref(); // this call might delete us | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 void SkLayer::removeChildren() { | |
| 121 int count = m_children.count(); | |
| 122 for (int i = 0; i < count; i++) { | |
| 123 SkLayer* child = m_children[i]; | |
| 124 SkASSERT(child->fParent == this); | |
| 125 child->fParent = NULL; // in case it has more than one owner | |
| 126 child->unref(); | |
| 127 } | |
| 128 m_children.reset(); | |
| 129 } | |
| 130 | |
| 131 SkLayer* SkLayer::getRootLayer() const { | |
| 132 const SkLayer* root = this; | |
| 133 while (root->fParent != NULL) { | |
| 134 root = root->fParent; | |
| 135 } | |
| 136 return const_cast<SkLayer*>(root); | |
| 137 } | |
| 138 | |
| 139 /////////////////////////////////////////////////////////////////////////////// | |
| 140 | |
| 141 void SkLayer::getLocalTransform(SkMatrix* matrix) const { | |
| 142 matrix->setTranslate(m_position.fX, m_position.fY); | |
| 143 | |
| 144 SkScalar tx = SkScalarMul(m_anchorPoint.fX, m_size.width()); | |
| 145 SkScalar ty = SkScalarMul(m_anchorPoint.fY, m_size.height()); | |
| 146 matrix->preTranslate(tx, ty); | |
| 147 matrix->preConcat(this->getMatrix()); | |
| 148 matrix->preTranslate(-tx, -ty); | |
| 149 } | |
| 150 | |
| 151 void SkLayer::localToGlobal(SkMatrix* matrix) const { | |
| 152 this->getLocalTransform(matrix); | |
| 153 | |
| 154 if (this->isInheritFromRootTransform()) { | |
| 155 matrix->postConcat(this->getRootLayer()->getMatrix()); | |
| 156 return; | |
| 157 } | |
| 158 | |
| 159 const SkLayer* layer = this; | |
| 160 while (layer->fParent != NULL) { | |
| 161 layer = layer->fParent; | |
| 162 | |
| 163 SkMatrix tmp; | |
| 164 layer->getLocalTransform(&tmp); | |
| 165 tmp.preConcat(layer->getChildrenMatrix()); | |
| 166 matrix->postConcat(tmp); | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 /////////////////////////////////////////////////////////////////////////////// | |
| 171 | |
| 172 void SkLayer::onDraw(SkCanvas*, SkScalar opacity) { | |
| 173 // SkDebugf("----- no onDraw for %p\n", this); | |
| 174 } | |
| 175 | |
| 176 #include "SkString.h" | |
| 177 | |
| 178 void SkLayer::draw(SkCanvas* canvas, SkScalar opacity) { | |
| 179 #if 0 | |
| 180 SkString str1, str2; | |
| 181 // this->getMatrix().toDumpString(&str1); | |
| 182 // this->getChildrenMatrix().toDumpString(&str2); | |
| 183 SkDebugf("--- drawlayer %p opacity %g size [%g %g] pos [%g %g] matrix %s children %s\n", | |
| 184 this, opacity * this->getOpacity(), m_size.width(), m_size.height(), | |
| 185 m_position.fX, m_position.fY, str1.c_str(), str2.c_str()); | |
| 186 #endif | |
| 187 | |
| 188 opacity = SkScalarMul(opacity, this->getOpacity()); | |
| 189 if (opacity <= 0) { | |
| 190 // SkDebugf("---- abort drawing %p opacity %g\n", this, opacity); | |
| 191 return; | |
| 192 } | |
| 193 | |
| 194 SkAutoCanvasRestore acr(canvas, true); | |
| 195 | |
| 196 // apply our local transform | |
| 197 { | |
| 198 SkMatrix tmp; | |
| 199 this->getLocalTransform(&tmp); | |
| 200 if (this->isInheritFromRootTransform()) { | |
| 201 // should we also apply the root's childrenMatrix? | |
| 202 canvas->setMatrix(getRootLayer()->getMatrix()); | |
| 203 } | |
| 204 canvas->concat(tmp); | |
| 205 } | |
| 206 | |
| 207 this->onDraw(canvas, opacity); | |
| 208 | |
| 209 #ifdef DEBUG_DRAW_LAYER_BOUNDS | |
| 210 { | |
| 211 SkRect r = SkRect::MakeSize(this->getSize()); | |
| 212 SkPaint p; | |
| 213 p.setAntiAlias(true); | |
| 214 p.setStyle(SkPaint::kStroke_Style); | |
| 215 p.setStrokeWidth(SkIntToScalar(2)); | |
| 216 p.setColor(0xFFFF44DD); | |
| 217 canvas->drawRect(r, p); | |
| 218 canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p); | |
| 219 canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p); | |
| 220 } | |
| 221 #endif | |
| 222 | |
| 223 int count = this->countChildren(); | |
| 224 if (count > 0) { | |
| 225 canvas->concat(this->getChildrenMatrix()); | |
| 226 for (int i = 0; i < count; i++) { | |
| 227 this->getChild(i)->draw(canvas, opacity); | |
| 228 } | |
| 229 } | |
| 230 } |
