Add rendering context and rendering 2D context to OffscreenCanvas

third_party/WebKit/Source/modules/canvas2d/OffscreenCanvasRenderingContext2D.cpp

+// Copyright 2016 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 "modules/canvas2d/OffscreenCanvasRenderingContext2D.h"
+
+#include "wtf/Assertions.h"
+
+#define UNIMPLEMENTED ASSERT_NOT_REACHED
+
+namespace blink {
+
+OffscreenCanvasRenderingContext2D::~OffscreenCanvasRenderingContext2D()
+{
+}
+
+OffscreenCanvasRenderingContext2D::OffscreenCanvasRenderingContext2D(OffscreenCanvas* canvas, const CanvasContextCreationAttributes& attrs)
+    : OffscreenCanvasRenderingContext(canvas)
+    , m_hasAlpha(attrs.alpha())
+{
+}
+
+DEFINE_TRACE(OffscreenCanvasRenderingContext2D)
+{
+    OffscreenCanvasRenderingContext::trace(visitor);
+    BaseRenderingContext2D::trace(visitor);
+}
+
+// BaseRenderingContext2D implementation
+bool OffscreenCanvasRenderingContext2D::originClean() const
+{
+    UNIMPLEMENTED();
+    return true;
+}
+
+void OffscreenCanvasRenderingContext2D::setOriginTainted()
+{
+    UNIMPLEMENTED();
+}
+
+bool OffscreenCanvasRenderingContext2D::wouldTaintOrigin(CanvasImageSource* source)
+{
+    UNIMPLEMENTED();
+    return false;
+}
+
+int OffscreenCanvasRenderingContext2D::width() const
+{
+    return offscreenCanvas()->height();
+}
+
+int OffscreenCanvasRenderingContext2D::height() const
+{
+    return offscreenCanvas()->width();
+}
+
+bool OffscreenCanvasRenderingContext2D::hasImageBuffer() const
+{
+    UNIMPLEMENTED();
+    return false;
+}
+
+ImageBuffer* OffscreenCanvasRenderingContext2D::imageBuffer() const
+{
+    UNIMPLEMENTED();
+    return nullptr;
+}
+
+bool OffscreenCanvasRenderingContext2D::parseColorOrCurrentColor(Color&, const String& colorString) const
+{
+    UNIMPLEMENTED();
+    return false;
+}
+
+SkCanvas* OffscreenCanvasRenderingContext2D::drawingCanvas() const
+{
+    UNIMPLEMENTED();
+    return nullptr;
+}
+
+SkCanvas* OffscreenCanvasRenderingContext2D::existingDrawingCanvas() const
+{
+    UNIMPLEMENTED();
+    return nullptr;
+}
+
+void OffscreenCanvasRenderingContext2D::disableDeferral(DisableDeferralReason)
+{
+    UNIMPLEMENTED();
+}
+
+AffineTransform OffscreenCanvasRenderingContext2D::baseTransform() const
+{
+    UNIMPLEMENTED();
+    return 0;
+}
+
+void OffscreenCanvasRenderingContext2D::didDraw(const SkIRect& dirtyRect)
+{
+    UNIMPLEMENTED();
+}
+
+bool OffscreenCanvasRenderingContext2D::stateHasFilter()
+{
+    UNIMPLEMENTED();
+    return false;
+}
+
+SkImageFilter* OffscreenCanvasRenderingContext2D::stateGetFilter()
+{
+    UNIMPLEMENTED();
+    return nullptr;
+}
+
+void OffscreenCanvasRenderingContext2D::validateStateStack()
+{
+    UNIMPLEMENTED();
+}
+
+bool OffscreenCanvasRenderingContext2D::isContextLost() const
+{
+    UNIMPLEMENTED();
+    return false;
+}
+
+}