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// Copyright (c) 2006-2008 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 SkPaintContext_h
#define SkPaintContext_h
#include "SkDashPathEffect.h"
#include "SkDrawLooper.h"
#include "SkDeque.h"
#include "SkPaint.h"
#include "SkPath.h"
namespace gfx {
class PlatformCanvasWin;
}
// This class is the interface to communicate to Skia. It is meant to be as
// opaque as possible. This class accept Skia native data format and not WebKit
// format.
// Every functions assume painting is enabled, callers should check this before
// calling any member function.
class SkPaintContext {
public:
// Duplicates WebCore::StrokeStyle. We can't include GraphicsContext.h here
// because we want to keep this class isolated from WebKit. Make sure both
// enums keep the same values. If StrokeStyle ever gets moved to
// GraphicsTypes.h, remove this duplicate and include GraphicsTypes.h
// instead.
enum StrokeStyle {
NoStroke,
SolidStroke,
DottedStroke,
DashedStroke
};
// Context will be NULL if painting should be disabled.
SkPaintContext(gfx::PlatformCanvasWin* context);
~SkPaintContext();
void save();
void restore();
void drawRect(SkRect rect);
void setup_paint_common(SkPaint* paint) const;
void setup_paint_fill(SkPaint* paint) const;
// Sets up the paint for stroking. Returns an int representing the width of
// the pen, or 1 if the pen's width is 0 if a non-zero length is provided,
// the number of dashes/dots on a dashed/dotted line will be adjusted to
// start and end that length with a dash/dot.
int setup_paint_stroke(SkPaint* paint, SkRect* rect, int length);
// State proxying functions
SkDrawLooper* setDrawLooper(SkDrawLooper* dl);
void setMiterLimit(float ml);
void setAlpha(float alpha);
void setLineCap(SkPaint::Cap lc);
void setLineJoin(SkPaint::Join lj);
void setFillRule(SkPath::FillType fr);
void setPorterDuffMode(SkPorterDuff::Mode pdm);
void setFillColor(SkColor color);
void setStrokeStyle(StrokeStyle strokestyle);
void setStrokeColor(SkColor strokecolor);
void setStrokeThickness(float thickness);
void beginPath();
void addPath(const SkPath& path);
SkPath* currentPath();
void setGradient(SkShader*);
void setPattern(SkShader*);
void setDashPathEffect(SkDashPathEffect*);
SkColor fillColor() const;
protected:
gfx::PlatformCanvasWin* canvas() {
return canvas_;
}
private:
// Defines drawing style.
struct State;
// NULL indicates painting is disabled. Never delete this object.
gfx::PlatformCanvasWin* canvas_;
// States stack. Enables local drawing state change with save()/restore()
// calls.
SkDeque state_stack_;
// Pointer to the current drawing state. This is a cached value of
// mStateStack.back().
State* state_;
// Current path
SkPath path_;
// Disallow these.
SkPaintContext(const SkPaintContext&);
void operator=(const SkPaintContext&);
};
#endif
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