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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "core/paint/SVGRootPainter.h"
#include "core/paint/BoxPainter.h"
#include "core/paint/TransformRecorder.h"
#include "core/rendering/PaintInfo.h"
#include "core/rendering/svg/RenderSVGRoot.h"
#include "core/rendering/svg/SVGRenderingContext.h"
#include "core/rendering/svg/SVGResources.h"
#include "core/rendering/svg/SVGResourcesCache.h"
#include "core/svg/SVGSVGElement.h"
#include "platform/graphics/paint/ClipRecorder.h"
namespace blink {
void SVGRootPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
// An empty viewport disables rendering.
if (m_renderSVGRoot.pixelSnappedBorderBoxRect().isEmpty())
return;
// SVG outlines are painted during PaintPhaseForeground.
if (paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline)
return;
// An empty viewBox also disables rendering.
// (http://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute)
SVGSVGElement* svg = toSVGSVGElement(m_renderSVGRoot.node());
ASSERT(svg);
if (svg->hasEmptyViewBox())
return;
// Don't paint if we don't have kids, except if we have filters we should paint those.
if (!m_renderSVGRoot.firstChild()) {
SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(&m_renderSVGRoot);
if (!resources || !resources->filter())
return;
}
PaintInfo childPaintInfo(paintInfo);
GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
// Apply initial viewport clip.
OwnPtr<ClipRecorder> clipRecorder;
if (m_renderSVGRoot.shouldApplyViewportClip())
clipRecorder = adoptPtr(new ClipRecorder(m_renderSVGRoot.displayItemClient(), childPaintInfo.context, childPaintInfo.displayItemTypeForClipping(), pixelSnappedIntRect(m_renderSVGRoot.overflowClipRect(paintOffset))));
// Convert from container offsets (html renderers) to a relative transform (svg renderers).
// Transform from our paint container's coordinate system to our local coords.
IntPoint adjustedPaintOffset = roundedIntPoint(paintOffset);
TransformRecorder transformRecorder(*childPaintInfo.context, m_renderSVGRoot.displayItemClient(), AffineTransform::translation(adjustedPaintOffset.x(), adjustedPaintOffset.y()) * m_renderSVGRoot.localToBorderBoxTransform());
// SVG doesn't use paintOffset internally but we need to bake it into the paint rect.
childPaintInfo.rect.move(-adjustedPaintOffset.x(), -adjustedPaintOffset.y());
SVGRenderingContext renderingContext;
if (childPaintInfo.phase == PaintPhaseForeground) {
renderingContext.prepareToRenderSVGContent(&m_renderSVGRoot, childPaintInfo);
if (!renderingContext.isRenderingPrepared())
return;
}
BoxPainter(m_renderSVGRoot).paint(childPaintInfo, LayoutPoint());
}
} // namespace blink
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