src/third_party/WebKit/Source/core/paint/SVGForeignObjectPainter.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "core/paint/SVGForeignObjectPainter.h"
   7
   8 #include "core/paint/BlockPainter.h"
   9 #include "core/rendering/PaintInfo.h"
  10 #include "core/rendering/svg/RenderSVGForeignObject.h"
  11 #include "core/rendering/svg/SVGRenderSupport.h"
  12 #include "core/rendering/svg/SVGRenderingContext.h"
  13 #include "platform/graphics/GraphicsContextStateSaver.h"
  14
  15 namespace blink {
  16
  17 void SVGForeignObjectPainter::paint(PaintInfo& paintInfo)
  18 {
  19     if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection)
  20         return;
  21
  22     PaintInfo childPaintInfo(paintInfo);
  23     GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
  24     childPaintInfo.applyTransform(m_renderSVGForeignObject.localTransform());
  25
  26     if (SVGRenderSupport::isOverflowHidden(&m_renderSVGForeignObject))
  27         childPaintInfo.context->clip(m_renderSVGForeignObject.viewportRect());
  28
  29     SVGRenderingContext renderingContext;
  30     bool continueRendering = true;
  31     if (paintInfo.phase == PaintPhaseForeground) {
  32         renderingContext.prepareToRenderSVGContent(&m_renderSVGForeignObject, childPaintInfo);
  33         continueRendering = renderingContext.isRenderingPrepared();
  34     }
  35
  36     if (continueRendering) {
  37         // Paint all phases of FO elements atomically as though the FO element established its own stacking context.
  38         bool preservePhase = paintInfo.phase == PaintPhaseSelection || paintInfo.phase == PaintPhaseTextClip;
  39         const LayoutPoint childPoint = IntPoint();
  40         childPaintInfo.phase = preservePhase ? paintInfo.phase : PaintPhaseBlockBackground;
  41         BlockPainter(m_renderSVGForeignObject).paint(childPaintInfo, childPoint);
  42         if (!preservePhase) {
  43             childPaintInfo.phase = PaintPhaseChildBlockBackgrounds;
  44             BlockPainter(m_renderSVGForeignObject).paint(childPaintInfo, childPoint);
  45             childPaintInfo.phase = PaintPhaseFloat;
  46             BlockPainter(m_renderSVGForeignObject).paint(childPaintInfo, childPoint);
  47             childPaintInfo.phase = PaintPhaseForeground;
  48             BlockPainter(m_renderSVGForeignObject).paint(childPaintInfo, childPoint);
  49             childPaintInfo.phase = PaintPhaseOutline;
  50             BlockPainter(m_renderSVGForeignObject).paint(childPaintInfo, childPoint);
  51         }
  52     }
  53 }
  54
  55 } // namespace blink