src/third_party/WebKit/Source/core/paint/SVGContainerPainter.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/SVGContainerPainter.h"
   7
   8 #include "core/frame/Settings.h"
   9 #include "core/paint/ObjectPainter.h"
  10 #include "core/rendering/GraphicsContextAnnotator.h"
  11 #include "core/rendering/PaintInfo.h"
  12 #include "core/rendering/svg/RenderSVGContainer.h"
  13 #include "core/rendering/svg/RenderSVGViewportContainer.h"
  14 #include "core/rendering/svg/SVGRenderSupport.h"
  15 #include "core/rendering/svg/SVGRenderingContext.h"
  16 #include "core/svg/SVGSVGElement.h"
  17 #include "platform/graphics/GraphicsContextCullSaver.h"
  18 #include "platform/graphics/GraphicsContextStateSaver.h"
  19
  20 namespace blink {
  21
  22 void SVGContainerPainter::paint(PaintInfo& paintInfo)
  23 {
  24     ANNOTATE_GRAPHICS_CONTEXT(paintInfo, &m_renderSVGContainer);
  25
  26     // Spec: groups w/o children still may render filter content.
  27     if (!m_renderSVGContainer.firstChild() && !m_renderSVGContainer.selfWillPaint())
  28         return;
  29
  30     FloatRect paintInvalidationRect = m_renderSVGContainer.paintInvalidationRectInLocalCoordinates();
  31     if (!SVGRenderSupport::paintInfoIntersectsPaintInvalidationRect(paintInvalidationRect, m_renderSVGContainer.localToParentTransform(), paintInfo))
  32         return;
  33
  34     // Spec: An empty viewBox on the <svg> element disables rendering.
  35     ASSERT(m_renderSVGContainer.element());
  36     if (isSVGSVGElement(*m_renderSVGContainer.element()) && toSVGSVGElement(*m_renderSVGContainer.element()).hasEmptyViewBox())
  37         return;
  38
  39     PaintInfo childPaintInfo(paintInfo);
  40     {
  41         GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
  42
  43         if (m_renderSVGContainer.isSVGViewportContainer() && SVGRenderSupport::isOverflowHidden(&m_renderSVGContainer))
  44             paintInfo.context->clip(toRenderSVGViewportContainer(m_renderSVGContainer).viewport());
  45
  46         childPaintInfo.applyTransform(m_renderSVGContainer.localToParentTransform());
  47
  48         SVGRenderingContext renderingContext;
  49         GraphicsContextCullSaver cullSaver(*childPaintInfo.context);
  50         bool continueRendering = true;
  51         if (childPaintInfo.phase == PaintPhaseForeground) {
  52             renderingContext.prepareToRenderSVGContent(&m_renderSVGContainer, childPaintInfo);
  53             continueRendering = renderingContext.isRenderingPrepared();
  54
  55             if (continueRendering && m_renderSVGContainer.document().settings()->containerCullingEnabled())
  56                 cullSaver.cull(paintInvalidationRect);
  57         }
  58
  59         if (continueRendering) {
  60             childPaintInfo.updatePaintingRootForChildren(&m_renderSVGContainer);
  61             for (RenderObject* child = m_renderSVGContainer.firstChild(); child; child = child->nextSibling())
  62                 child->paint(childPaintInfo, IntPoint());
  63         }
  64     }
  65
  66     // FIXME: This really should be drawn from local coordinates, but currently we hack it
  67     // to avoid our clip killing our outline rect. Thus we translate our
  68     // outline rect into parent coords before drawing.
  69     // FIXME: This means our focus ring won't share our rotation like it should.
  70     // We should instead disable our clip during PaintPhaseOutline
  71     if (paintInfo.phase == PaintPhaseForeground && m_renderSVGContainer.style()->outlineWidth() && m_renderSVGContainer.style()->visibility() == VISIBLE) {
  72         IntRect paintRectInParent = enclosingIntRect(m_renderSVGContainer.localToParentTransform().mapRect(paintInvalidationRect));
  73         ObjectPainter(m_renderSVGContainer).paintOutline(paintInfo, paintRectInParent);
  74     }
  75 }
  76
  77 } // namespace blink