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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSVGRenderContext_DEFINED
#define SkSVGRenderContext_DEFINED
#include "SkPaint.h"
#include "SkRect.h"
#include "SkSize.h"
#include "SkTLazy.h"
#include "SkTypes.h"
class SkCanvas;
class SkSVGLength;
class SkSVGLengthContext {
public:
SkSVGLengthContext(const SkSize& viewport) : fViewport(viewport) {}
enum class LengthType {
kHorizontal,
kVertical,
kOther,
};
const SkSize& viewPort() const { return fViewport; }
void setViewPort(const SkSize& viewport) { fViewport = viewport; }
SkScalar resolve(const SkSVGLength&, LengthType) const;
SkRect resolveRect(const SkSVGLength& x, const SkSVGLength& y,
const SkSVGLength& w, const SkSVGLength& h) const;
private:
SkSize fViewport;
};
class SkSVGPresentationContext {
public:
SkSVGPresentationContext();
SkSVGPresentationContext(const SkSVGPresentationContext&);
SkSVGPresentationContext& operator=(const SkSVGPresentationContext&);
const SkPaint* fillPaint() const { return fFill.getMaybeNull(); }
const SkPaint* strokePaint() const { return fStroke.getMaybeNull(); }
void setFillColor(SkColor);
void setStrokeColor(SkColor);
private:
void initFrom(const SkSVGPresentationContext&);
SkPaint& ensureFill();
SkPaint& ensureStroke();
// TODO: convert to regular SkPaints and track explicit attribute values instead.
SkTLazy<SkPaint> fFill;
SkTLazy<SkPaint> fStroke;
};
class SkSVGRenderContext {
public:
SkSVGRenderContext(SkCanvas*, const SkSVGLengthContext&, const SkSVGPresentationContext&);
SkSVGRenderContext(const SkSVGRenderContext&);
~SkSVGRenderContext();
const SkSVGLengthContext& lengthContext() const { return *fLengthContext; }
SkSVGLengthContext* writableLengthContext() { return fLengthContext.writable(); }
const SkSVGPresentationContext& presentationContext() const { return *fPresentationContext; }
SkSVGPresentationContext* writablePresentationContext() {
return fPresentationContext.writable();
}
SkCanvas* canvas() const { return fCanvas; }
private:
// Stack-only
void* operator new(size_t) = delete;
void* operator new(size_t, void*) = delete;
SkSVGRenderContext& operator=(const SkSVGRenderContext&) = delete;
SkTCopyOnFirstWrite<SkSVGLengthContext> fLengthContext;
SkTCopyOnFirstWrite<SkSVGPresentationContext> fPresentationContext;
SkCanvas* fCanvas;
// The save count on 'fCanvas' at construction time.
// A restoreToCount() will be issued on destruction.
int fCanvasSaveCount;
};
#endif // SkSVGRenderContext_DEFINED
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