82065d667f
SkSafeRef() and SkSafeUnref().
This is basically a bug waiting to happen. An optimizing compiler can remove
checks for null on "this" if it chooses. However, SkRefCnt::safeRef() relies on
precisely this check...
void SkRefCnt::safeRef() {
if (this) {
this->ref();
}
}
Since a compiler might skip the if-clause, it breaks the intention of this
method, hence its removal.
static inline void SkSafeRef(SkRefCnt* obj) {
if (obj) {
obj->ref();
}
}
This form is not ignored by an optimizing compile, so we use it instead.
git-svn-id: http://skia.googlecode.com/svn/trunk@762 2bbb7eff-a529-9590-31e7-b0007b416f81
102 lines
3.0 KiB
C++
102 lines
3.0 KiB
C++
#include "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkGraphics.h"
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#include "SkRandom.h"
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#include "SkLayerDrawLooper.h"
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#include "SkBlurMaskFilter.h"
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#define WIDTH 200
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#define HEIGHT 200
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class LooperView : public SkView {
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public:
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SkLayerDrawLooper* fLooper;
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LooperView() {
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static const struct {
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SkColor fColor;
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SkPaint::Style fStyle;
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SkScalar fWidth;
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SkScalar fOffset;
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int fBlur;
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} gParams[] = {
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{ SK_ColorWHITE, SkPaint::kStroke_Style, SkIntToScalar(1)*3/4, 0, 0 },
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{ SK_ColorRED, SkPaint::kStroke_Style, SkIntToScalar(4), 0, 0 },
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{ SK_ColorBLUE, SkPaint::kFill_Style, 0, 0, 0 },
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{ 0x88000000, SkPaint::kFill_Style, 0, SkIntToScalar(10), 3 }
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};
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fLooper = new SkLayerDrawLooper;
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for (int i = 0; i < SK_ARRAY_COUNT(gParams); i++) {
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SkPaint* paint = fLooper->addLayer(gParams[i].fOffset,
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gParams[i].fOffset);
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paint->setAntiAlias(true);
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paint->setColor(gParams[i].fColor);
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paint->setStyle(gParams[i].fStyle);
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paint->setStrokeWidth(gParams[i].fWidth);
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paint->setTextSize(SkIntToScalar(72));
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if (gParams[i].fBlur > 0) {
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SkMaskFilter* mf = SkBlurMaskFilter::Create(SkIntToScalar(gParams[i].fBlur),
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SkBlurMaskFilter::kNormal_BlurStyle);
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paint->setMaskFilter(mf)->unref();
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}
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}
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}
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virtual ~LooperView() {
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SkSafeUnref(fLooper);
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "DrawLooper");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(0xFFDDDDDD);
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// canvas->drawColor(SK_ColorWHITE);
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->drawBG(canvas);
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SkPaint paint;
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paint.setLooper(fLooper);
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canvas->drawCircle(SkIntToScalar(50), SkIntToScalar(50),
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SkIntToScalar(30), paint);
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canvas->drawRectCoords(SkIntToScalar(150), SkIntToScalar(50),
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SkIntToScalar(200), SkIntToScalar(100), paint);
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canvas->drawText("Looper", 6, SkIntToScalar(230), SkIntToScalar(100),
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paint);
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}
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virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
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this->inval(NULL);
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return this->INHERITED::onFindClickHandler(x, y);
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}
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virtual bool onClick(Click* click) {
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return this->INHERITED::onClick(click);
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}
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private:
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typedef SkView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new LooperView; }
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static SkViewRegister reg(MyFactory);
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