mirror of https://github.com/axmolengine/axmol.git
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2006 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef SkBounder_DEFINED
|
||
|
|
#define SkBounder_DEFINED
|
||
|
|
|
||
|
|
#include "SkTypes.h"
|
||
|
|
#include "SkRefCnt.h"
|
||
|
|
#include "SkPoint.h"
|
||
|
|
|
||
|
|
struct SkGlyph;
|
||
|
|
struct SkIRect;
|
||
|
|
struct SkPoint;
|
||
|
|
struct SkRect;
|
||
|
|
class SkPaint;
|
||
|
|
class SkPath;
|
||
|
|
class SkRegion;
|
||
|
|
|
||
|
|
/** \class SkBounder
|
||
|
|
|
||
|
|
Base class for intercepting the device bounds of shapes before they are drawn.
|
||
|
|
Install a subclass of this in your canvas.
|
||
|
|
*/
|
||
|
|
class SkBounder : public SkRefCnt {
|
||
|
|
public:
|
||
|
|
SkBounder();
|
||
|
|
|
||
|
|
/* Call to perform a clip test before calling onIRect.
|
||
|
|
Returns the result from onIRect.
|
||
|
|
*/
|
||
|
|
bool doIRect(const SkIRect&);
|
||
|
|
bool doIRectGlyph(const SkIRect& , int x, int y, const SkGlyph&);
|
||
|
|
|
||
|
|
protected:
|
||
|
|
/** Override in your subclass. This is called with the device bounds of an
|
||
|
|
object (text, geometry, image) just before it is drawn. If your method
|
||
|
|
returns false, the drawing for that shape is aborted. If your method
|
||
|
|
returns true, drawing continues. The bounds your method receives have already
|
||
|
|
been transformed in to device coordinates, and clipped to the current clip.
|
||
|
|
*/
|
||
|
|
virtual bool onIRect(const SkIRect&) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Passed to onIRectGlyph with the information about the current glyph.
|
||
|
|
LSB and RSB are fixed-point (16.16) coordinates of the start and end
|
||
|
|
of the glyph's advance
|
||
|
|
*/
|
||
|
|
struct GlyphRec {
|
||
|
|
SkIPoint fLSB; //!< fixed-point left-side-bearing of the glyph
|
||
|
|
SkIPoint fRSB; //!< fixed-point right-side-bearing of the glyph
|
||
|
|
uint16_t fGlyphID;
|
||
|
|
uint16_t fFlags; //!< currently set to 0
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Optionally, override in your subclass to receive the glyph ID when
|
||
|
|
text drawing supplies the device bounds of the object.
|
||
|
|
*/
|
||
|
|
virtual bool onIRectGlyph(const SkIRect& r, const GlyphRec&) {
|
||
|
|
return onIRect(r);
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Called after each shape has been drawn. The default implementation does
|
||
|
|
nothing, but your override could use this notification to signal itself
|
||
|
|
that the offscreen being rendered into needs to be updated to the screen.
|
||
|
|
*/
|
||
|
|
virtual void commit();
|
||
|
|
|
||
|
|
private:
|
||
|
|
bool doHairline(const SkPoint&, const SkPoint&, const SkPaint&);
|
||
|
|
bool doRect(const SkRect&, const SkPaint&);
|
||
|
|
bool doPath(const SkPath&, const SkPaint&, bool doFill);
|
||
|
|
void setClip(const SkRegion* clip) { fClip = clip; }
|
||
|
|
|
||
|
|
const SkRegion* fClip;
|
||
|
|
friend class SkAutoBounderCommit;
|
||
|
|
friend class SkDraw;
|
||
|
|
friend class SkDrawIter;
|
||
|
|
friend struct Draw1Glyph;
|
||
|
|
friend class SkMaskFilter;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|