Use enum classes and OptionSets for PaintPhase and PaintBehavior
[WebKit-https.git] / Source / WebCore / rendering / RenderHTMLCanvas.cpp
index 0c0796c..5a3086e 100644 (file)
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 #include "GraphicsContext.h"
 #include "HTMLCanvasElement.h"
 #include "HTMLNames.h"
+#include "ImageQualityController.h"
 #include "Page.h"
 #include "PaintInfo.h"
 #include "RenderView.h"
+#include <wtf/IsoMallocInlines.h>
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
-RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement* element)
-    : RenderReplaced(element, element->size())
+WTF_MAKE_ISO_ALLOCATED_IMPL(RenderHTMLCanvas);
+
+RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement& element, RenderStyle&& style)
+    : RenderReplaced(element, WTFMove(style), element.size())
+{
+    // Actual size is not known yet, report the default intrinsic size.
+    view().frameView().incrementVisuallyNonEmptyPixelCount(roundedIntSize(intrinsicSize()));
+}
+
+HTMLCanvasElement& RenderHTMLCanvas::canvasElement() const
 {
-    view()->frameView()->setIsVisuallyNonEmpty();
+    return downcast<HTMLCanvasElement>(nodeForNonAnonymous());
 }
 
 bool RenderHTMLCanvas::requiresLayer() const
 {
     if (RenderReplaced::requiresLayer())
         return true;
-    
-    HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(node());
-    return canvas && canvas->renderingContext() && canvas->renderingContext()->isAccelerated();
+
+    if (CanvasRenderingContext* context = canvasElement().renderingContext())
+        return context->isAccelerated();
+
+    return false;
 }
 
 void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
-    LayoutRect rect = contentBoxRect();
-    rect.moveBy(paintOffset);
-
-    if (Frame* frame = this->frame()) {
-        if (Page* page = frame->page()) {
-            if (paintInfo.phase == PaintPhaseForeground)
-                page->addRelevantRepaintedObject(this, rect);
-        }
-    }
-
-    bool useLowQualityScale = style()->imageRendering() == ImageRenderingPixelated || style()->imageRendering() == ImageRenderingCrispEdges || style()->imageRendering() == ImageRenderingOptimizeSpeed;
-    static_cast<HTMLCanvasElement*>(node())->paint(paintInfo.context, rect, useLowQualityScale);
+    GraphicsContext& context = paintInfo.context();
+
+    LayoutRect contentBoxRect = this->contentBoxRect();
+    contentBoxRect.moveBy(paintOffset);
+    LayoutRect replacedContentRect = this->replacedContentRect();
+    replacedContentRect.moveBy(paintOffset);
+
+    // Not allowed to overflow the content box.
+    bool clip = !contentBoxRect.contains(replacedContentRect);
+    GraphicsContextStateSaver stateSaver(paintInfo.context(), clip);
+    if (clip)
+        paintInfo.context().clip(snappedIntRect(contentBoxRect));
+
+    if (paintInfo.phase == PaintPhase::Foreground)
+        page().addRelevantRepaintedObject(this, intersection(replacedContentRect, contentBoxRect));
+
+    InterpolationQualityMaintainer interpolationMaintainer(context, ImageQualityController::interpolationQualityFromStyle(style()));
+    canvasElement().paint(context, replacedContentRect);
 }
 
 void RenderHTMLCanvas::canvasSizeChanged()
 {
-    IntSize canvasSize = static_cast<HTMLCanvasElement*>(node())->size();
-    LayoutSize zoomedSize(canvasSize.width() * style()->effectiveZoom(), canvasSize.height() * style()->effectiveZoom());
+    IntSize canvasSize = canvasElement().size();
+    LayoutSize zoomedSize(canvasSize.width() * style().effectiveZoom(), canvasSize.height() * style().effectiveZoom());
 
     if (zoomedSize == intrinsicSize())
         return;
@@ -84,18 +102,7 @@ void RenderHTMLCanvas::canvasSizeChanged()
 
     if (!parent())
         return;
-
-    if (!preferredLogicalWidthsDirty())
-        setPreferredLogicalWidthsDirty(true);
-
-    LayoutSize oldSize = size();
-    updateLogicalWidth();
-    updateLogicalHeight();
-    if (oldSize == size())
-        return;
-
-    if (!selfNeedsLayout())
-        setNeedsLayout(true);
+    setNeedsLayoutIfNeededAfterIntrinsicSizeChange();
 }
 
 } // namespace WebCore