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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/ImagePainter.h"
#include "core/dom/Document.h"
#include "core/dom/Element.h"
#include "core/editing/FrameSelection.h"
#include "core/frame/LocalFrame.h"
#include "core/html/HTMLAreaElement.h"
#include "core/html/HTMLImageElement.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "core/page/Page.h"
#include "core/paint/BoxPainter.h"
#include "core/paint/RenderDrawingRecorder.h"
#include "core/rendering/PaintInfo.h"
#include "core/rendering/RenderImage.h"
#include "core/rendering/RenderReplaced.h"
#include "core/rendering/TextRunConstructor.h"
#include "platform/geometry/LayoutPoint.h"
#include "platform/graphics/GraphicsContextStateSaver.h"
#include "platform/graphics/Path.h"
namespace blink {
void ImagePainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
m_renderImage.RenderReplaced::paint(paintInfo, paintOffset);
if (paintInfo.phase == PaintPhaseOutline)
paintAreaElementFocusRing(paintInfo);
}
void ImagePainter::paintAreaElementFocusRing(const PaintInfo& paintInfo)
{
Document& document = m_renderImage.document();
if (document.printing() || !document.frame()->selection().isFocusedAndActive())
return;
Element* focusedElement = document.focusedElement();
if (!isHTMLAreaElement(focusedElement))
return;
HTMLAreaElement& areaElement = toHTMLAreaElement(*focusedElement);
if (areaElement.imageElement() != m_renderImage.node())
return;
// Even if the theme handles focus ring drawing for entire elements, it won't do it for
// an area within an image, so we don't call RenderTheme::supportsFocusRing here.
Path path = areaElement.computePath(&m_renderImage);
if (path.isEmpty())
return;
RenderStyle* areaElementStyle = areaElement.computedStyle();
unsigned short outlineWidth = areaElementStyle->outlineWidth();
if (!outlineWidth)
return;
// FIXME: Clip path instead of context when Skia pathops is ready.
// https://crbug.com/251206
GraphicsContextStateSaver savedContext(*paintInfo.context);
IntRect focusRect = m_renderImage.absoluteContentBox();
RenderDrawingRecorder recorder(paintInfo.context, m_renderImage, paintInfo.phase, focusRect);
if (recorder.canUseCachedDrawing())
return;
paintInfo.context->clip(focusRect);
paintInfo.context->drawFocusRing(path, outlineWidth,
areaElementStyle->outlineOffset(),
m_renderImage.resolveColor(areaElementStyle, CSSPropertyOutlineColor));
}
void ImagePainter::paintReplaced(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
LayoutUnit cWidth = m_renderImage.contentWidth();
LayoutUnit cHeight = m_renderImage.contentHeight();
GraphicsContext* context = paintInfo.context;
if (!m_renderImage.imageResource()->hasImage()) {
if (paintInfo.phase == PaintPhaseSelection)
return;
if (cWidth > 2 && cHeight > 2) {
// Draw an outline rect where the image should be.
IntRect paintRect = pixelSnappedIntRect(LayoutRect(paintOffset.x() + m_renderImage.borderLeft() + m_renderImage.paddingLeft(), paintOffset.y() + m_renderImage.borderTop() + m_renderImage.paddingTop(), cWidth, cHeight));
context->setStrokeStyle(SolidStroke);
context->setStrokeColor(Color::lightGray);
context->setFillColor(Color::transparent);
context->drawRect(paintRect);
}
} else if (cWidth > 0 && cHeight > 0) {
LayoutRect contentRect = m_renderImage.contentBoxRect();
contentRect.moveBy(paintOffset);
LayoutRect paintRect = m_renderImage.replacedContentRect();
paintRect.moveBy(paintOffset);
bool clip = !contentRect.contains(paintRect);
if (clip) {
context->save();
context->clip(contentRect);
}
paintIntoRect(context, paintRect);
if (clip)
context->restore();
}
}
void ImagePainter::paintIntoRect(GraphicsContext* context, const LayoutRect& rect)
{
if (!m_renderImage.imageResource()->hasImage() || m_renderImage.imageResource()->errorOccurred())
return; // FIXME: should we just ASSERT these conditions? (audit all callers).
IntRect alignedRect = pixelSnappedIntRect(rect);
if (alignedRect.width() <= 0 || alignedRect.height() <= 0)
return;
RefPtr<Image> image = m_renderImage.imageResource()->image(alignedRect.width(), alignedRect.height());
if (!image || image->isNull())
return;
// FIXME: why is interpolation quality selection not included in the Instrumentation reported cost of drawing an image?
InterpolationQuality interpolationQuality = BoxPainter::chooseInterpolationQuality(m_renderImage, context, image.get(), image.get(), LayoutSize(alignedRect.size()));
TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "PaintImage", "data", InspectorPaintImageEvent::data(m_renderImage));
// FIXME: crbug.com/361045 remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
InspectorInstrumentation::willPaintImage(&m_renderImage);
InterpolationQuality previousInterpolationQuality = context->imageInterpolationQuality();
context->setImageInterpolationQuality(interpolationQuality);
context->drawImage(image.get(), alignedRect, CompositeSourceOver, m_renderImage.shouldRespectImageOrientation());
context->setImageInterpolationQuality(previousInterpolationQuality);
InspectorInstrumentation::didPaintImage(&m_renderImage);
}
} // namespace blink
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