context.addHitRegion() is not working when using transform operation.

Source/core/html/canvas/CanvasRenderingContext2D.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012, 2013 Intel Corporation. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
@@ skipping 240 matching lines @@
     , m_globalAlpha(1)
     , m_globalComposite(CompositeSourceOver)
     , m_globalBlend(blink::WebBlendModeNormal)
     , m_invertibleCTM(true)
     , m_lineDashOffset(0)
     , m_imageSmoothingEnabled(true)
     , m_textAlign(StartTextAlign)
     , m_textBaseline(AlphabeticTextBaseline)
     , m_unparsedFont(defaultFont)
     , m_realizedFont(false)
+    , m_hasClip(false)
 {
 }
 
 CanvasRenderingContext2D::State::State(const State& other)
     : CSSFontSelectorClient()
     , m_unrealizedSaveCount(other.m_unrealizedSaveCount)
     , m_unparsedStrokeColor(other.m_unparsedStrokeColor)
     , m_unparsedFillColor(other.m_unparsedFillColor)
     , m_strokeStyle(other.m_strokeStyle)
     , m_fillStyle(other.m_fillStyle)
     , m_lineWidth(other.m_lineWidth)
     , m_lineCap(other.m_lineCap)
     , m_lineJoin(other.m_lineJoin)
     , m_miterLimit(other.m_miterLimit)
     , m_shadowOffset(other.m_shadowOffset)
     , m_shadowBlur(other.m_shadowBlur)
     , m_shadowColor(other.m_shadowColor)
     , m_globalAlpha(other.m_globalAlpha)
     , m_globalComposite(other.m_globalComposite)
     , m_globalBlend(other.m_globalBlend)
     , m_transform(other.m_transform)
     , m_invertibleCTM(other.m_invertibleCTM)
     , m_lineDashOffset(other.m_lineDashOffset)
     , m_imageSmoothingEnabled(other.m_imageSmoothingEnabled)
     , m_textAlign(other.m_textAlign)
     , m_textBaseline(other.m_textBaseline)
     , m_unparsedFont(other.m_unparsedFont)
     , m_font(other.m_font)
     , m_realizedFont(other.m_realizedFont)
+    , m_hasClip(other.m_hasClip)
 {
     if (m_realizedFont)
         static_cast<CSSFontSelector*>(m_font.fontSelector())->registerForInvalidationCallbacks(this);
 }
 
 CanvasRenderingContext2D::State& CanvasRenderingContext2D::State::operator=(const State& other)
 {
     if (this == &other)
         return *this;
 
@@ skipping 18 matching lines @@
     m_globalComposite = other.m_globalComposite;
     m_globalBlend = other.m_globalBlend;
     m_transform = other.m_transform;
     m_invertibleCTM = other.m_invertibleCTM;
     m_imageSmoothingEnabled = other.m_imageSmoothingEnabled;
     m_textAlign = other.m_textAlign;
     m_textBaseline = other.m_textBaseline;
     m_unparsedFont = other.m_unparsedFont;
     m_font = other.m_font;
     m_realizedFont = other.m_realizedFont;
+    m_hasClip = other.m_hasClip;
 
     if (m_realizedFont)
         static_cast<CSSFontSelector*>(m_font.fontSelector())->registerForInvalidationCallbacks(this);
 
     return *this;
 }
 
 CanvasRenderingContext2D::State::~State()
 {
 #if !ENABLE(OILPAN)
@@ skipping 751 matching lines @@
     GraphicsContext* c = drawingContext();
     if (!c) {
         return;
     }
     if (!state().m_invertibleCTM) {
         return;
     }
 
     realizeSaves();
     c->canvasClip(path, parseWinding(windingRuleString));
+    modifiableState().m_hasClip = true;
 }
 
 void CanvasRenderingContext2D::clip(const String& windingRuleString)
 {
     clipInternal(m_path, windingRuleString);
 }
 
 void CanvasRenderingContext2D::clip(Path2D* domPath, const String& windingRuleString)
 {
     clipInternal(domPath->path(), windingRuleString);
@@ skipping 1269 matching lines @@
 
     if (m_path.isEmpty() || !context || !state().m_invertibleCTM
         || !context->getTransformedClipBounds(&clipBounds)) {
         exceptionState.throwDOMException(NotSupportedError, "The specified path has no pixels.");
         return;
     }
 
     Path specifiedPath = m_path;
     specifiedPath.transform(state().m_transform);
 
-    if (context->isClipMode()) {
+    if (hasClip()) {
         // FIXME: The hit regions should take clipping region into account.
         // However, we have no way to get the region from canvas state stack by now.
         // See http://crbug.com/387057
         exceptionState.throwDOMException(NotSupportedError, "The specified path has no pixels.");
         return;
     }
 
     passOptions.path = specifiedPath;
 
     String fillRuleString;
@@ skipping 42 matching lines @@
 
 unsigned CanvasRenderingContext2D::hitRegionsCount() const
 {
     if (m_hitRegionManager)
         return m_hitRegionManager->getHitRegionsCount();
 
     return 0;
 }
 
 } // namespace WebCore