Pull up a subset of CanvasRenderingContext2D into BaseRenderingContext2D.

third_party/WebKit/Source/modules/canvas2d/BaseRenderingContext2D.h

+// 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.
+
+#ifndef BaseRenderingContext2D_h
+#define BaseRenderingContext2D_h
+
+#include "bindings/core/v8/UnionTypesCore.h"
+#include "bindings/modules/v8/UnionTypesModules.h"
+#include "core/html/canvas/CanvasRenderingContext.h"
+#include "modules/ModulesExport.h"
+#include "modules/canvas2d/CanvasPathMethods.h"
+#include "modules/canvas2d/CanvasRenderingContext2DState.h"
+
+namespace blink {
+
+class CanvasImageSource;
+class Color;
+class Image;
+class ImageBuffer;
+class Path2D;
+class SVGMatrixTearOff;
+
+typedef HTMLImageElementOrHTMLVideoElementOrHTMLCanvasElementOrImageBitmap CanvasImageSourceUnion;
+
+class MODULES_EXPORT BaseRenderingContext2D : public WillBeGarbageCollectedMixin, public CanvasPathMethods {
+public:
+    ~BaseRenderingContext2D() override;
+
+    void strokeStyle(StringOrCanvasGradientOrCanvasPattern&) const;
+    void setStrokeStyle(const StringOrCanvasGradientOrCanvasPattern&);
+
+    void fillStyle(StringOrCanvasGradientOrCanvasPattern&) const;
+    void setFillStyle(const StringOrCanvasGradientOrCanvasPattern&);
+
+    double lineWidth() const;
+    void setLineWidth(double);
+
+    String lineCap() const;
+    void setLineCap(const String&);
+
+    String lineJoin() const;
+    void setLineJoin(const String&);
+
+    double miterLimit() const;
+    void setMiterLimit(double);
+
+    const Vector<double>& getLineDash() const;
+    void setLineDash(const Vector<double>&);
+
+    double lineDashOffset() const;
+    void setLineDashOffset(double);
+
+    double shadowOffsetX() const;
+    void setShadowOffsetX(double);
+
+    double shadowOffsetY() const;
+    void setShadowOffsetY(double);
+
+    double shadowBlur() const;
+    void setShadowBlur(double);
+
+    String shadowColor() const;
+    void setShadowColor(const String&);
+
+    double globalAlpha() const;
+    void setGlobalAlpha(double);
+
+    String globalCompositeOperation() const;
+    void setGlobalCompositeOperation(const String&);
+
+    String filter() const;
+    void setFilter(const String&);
+
+    void save();
+    void restore();
+
+    PassRefPtrWillBeRawPtr<SVGMatrixTearOff> currentTransform() const;
+    void setCurrentTransform(PassRefPtrWillBeRawPtr<SVGMatrixTearOff>);
+
+    void scale(double sx, double sy);
+    void rotate(double angleInRadians);
+    void translate(double tx, double ty);
+    void transform(double m11, double m12, double m21, double m22, double dx, double dy);
+    void setTransform(double m11, double m12, double m21, double m22, double dx, double dy);
+    void resetTransform();
+
+    void beginPath();
+
+    void fill(const String& winding = "nonzero");
+    void fill(Path2D*, const String& winding = "nonzero");
+    void stroke();
+    void stroke(Path2D*);
+    void clip(const String& winding = "nonzero");
+    void clip(Path2D*, const String& winding = "nonzero");
+
+    bool isPointInPath(const double x, const double y, const String& winding = "nonzero");
+    bool isPointInPath(Path2D*, const double x, const double y, const String& winding = "nonzero");
+    bool isPointInStroke(const double x, const double y);
+    bool isPointInStroke(Path2D*, const double x, const double y);
+
+    void clearRect(double x, double y, double width, double height);
+    void fillRect(double x, double y, double width, double height);
+    void strokeRect(double x, double y, double width, double height);
+
+    void drawImage(const CanvasImageSourceUnion&, double x, double y, ExceptionState&);
+    void drawImage(const CanvasImageSourceUnion&, double x, double y, double width, double height, ExceptionState&);
+    void drawImage(const CanvasImageSourceUnion&, double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh, ExceptionState&);
+    void drawImage(CanvasImageSource*, double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh, ExceptionState&);
+
+    CanvasGradient* createLinearGradient(double x0, double y0, double x1, double y1);
+    CanvasGradient* createRadialGradient(double x0, double y0, double r0, double x1, double y1, double r1, ExceptionState&);
+    CanvasPattern* createPattern(const CanvasImageSourceUnion&, const String& repetitionType, ExceptionState&);
+
+    bool imageSmoothingEnabled() const;
+    void setImageSmoothingEnabled(bool);
+    String imageSmoothingQuality() const;
+    void setImageSmoothingQuality(const String&);
+
+    virtual bool originClean() const = 0;
+    virtual void setOriginTainted() = 0;
+    virtual bool wouldTaintOrigin(CanvasImageSource*) = 0;
+
+    virtual int width() const = 0;
+    virtual int height() const = 0;
+
+    virtual bool hasImageBuffer() const = 0;
+    virtual ImageBuffer* imageBuffer() const = 0;
+
+    virtual bool parseColorOrCurrentColor(Color&, const String& colorString) const = 0;
+
+    virtual SkCanvas* drawingCanvas() const = 0;
+    virtual SkCanvas* existingDrawingCanvas() const = 0;
+    virtual void disableDeferral(DisableDeferralReason) = 0;
+
+    virtual AffineTransform baseTransform() const = 0;
+
+    virtual void didDraw(const SkIRect& dirtyRect) = 0;
+
+    virtual bool stateHasFilter() = 0;
+    virtual SkImageFilter* stateGetFilter() = 0;
+
+    virtual void validateStateStack() = 0;
+
+    virtual bool hasAlpha() const = 0;
+
+    DECLARE_VIRTUAL_TRACE();
+
+protected:
+    BaseRenderingContext2D();
+
+    CanvasRenderingContext2DState& modifiableState();
+    const CanvasRenderingContext2DState& state() const { return *m_stateStack.last(); }
+
+    bool computeDirtyRect(const FloatRect& localBounds, SkIRect*);
+    bool computeDirtyRect(const FloatRect& localBounds, const SkIRect& transformedClipBounds, SkIRect*);
+
+    void drawForText(const Font&, const TextRunPaintInfo&, const FloatPoint& location, CanvasRenderingContext2DState::PaintType);
+
+    void inflateStrokeRect(FloatRect&) const;
+
+    enum DrawType {
+        ClipFill, // Fill that is already known to cover the current clip
+        UntransformedUnclippedFill
+    };
+
+    void checkOverdraw(const SkRect&, const SkPaint*, CanvasRenderingContext2DState::ImageType, DrawType);
+
+    WillBeHeapVector<OwnPtrWillBeMember<CanvasRenderingContext2DState>> m_stateStack;
+    AntiAliasingMode m_clipAntialiasing;
+
+private:
+    void realizeSaves();
+
+    bool shouldDrawImageAntialiased(const FloatRect& destRect) const;
+
+    template<typename DrawFunc, typename ContainsFunc>
+    bool draw(const DrawFunc&, const ContainsFunc&, const SkRect& bounds, CanvasRenderingContext2DState::PaintType, CanvasRenderingContext2DState::ImageType = CanvasRenderingContext2DState::NoImage);
+    void drawPathInternal(const Path&, CanvasRenderingContext2DState::PaintType, SkPath::FillType = SkPath::kWinding_FillType);
+    void drawImageInternal(SkCanvas*, CanvasImageSource*, Image*, const FloatRect& srcRect, const FloatRect& dstRect, const SkPaint*);
+    void clipInternal(const Path&, const String& windingRuleString);
+
+    bool isPointInPathInternal(const Path&, const double x, const double y, const String& windingRuleString);
+    bool isPointInStrokeInternal(const Path&, const double x, const double y);
+
+    template<typename DrawFunc>
+    void compositedDraw(const DrawFunc&, SkCanvas*, CanvasRenderingContext2DState::PaintType, CanvasRenderingContext2DState::ImageType);
+
+    void clearCanvas();
+    bool rectContainsTransformedRect(const FloatRect&, const SkIRect&) const;
+};
+
+} // namespace blink
+
+#endif // BaseRenderingContext2D_h