dbfd7ab108
'static const' means, there must be at most one of these, and initialize it at compile time if possible or runtime if necessary. This leads to unexpected code execution, and TSAN* will complain about races on the guard variables. Generally 'constexpr' or 'const' are better choices. Neither can cause races: they're either intialized at compile time (constexpr) or intialized each time independently (const). This CL prefers constexpr where possible, and uses const where not. It even prefers constexpr over const where they don't make a difference... I want to have lots of examples of constexpr for people to see and mimic. The scoped-to-class static has nothing to do with any of this, and is not changed. * Not yet on the bots, which use an older TSAN. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2300623005 Review-Url: https://codereview.chromium.org/2300623005
98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkBlurMask.h"
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#include "SkBlurMaskFilter.h"
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#include "SkCanvas.h"
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#include "SkGraphics.h"
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#include "SkLayerDrawLooper.h"
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#include "SkRandom.h"
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#define WIDTH 200
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#define HEIGHT 200
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class DrawLooperGM : public skiagm::GM {
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public:
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DrawLooperGM() : fLooper(nullptr) {
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this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
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}
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protected:
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virtual SkISize onISize() override {
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return SkISize::Make(520, 160);
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}
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SkString onShortName() override {
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return SkString("drawlooper");
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}
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void onDraw(SkCanvas* canvas) override {
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this->init();
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SkPaint paint;
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paint.setAntiAlias(true);
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sk_tool_utils::set_portable_typeface(&paint);
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paint.setTextSize(SkIntToScalar(72));
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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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private:
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sk_sp<SkDrawLooper> fLooper;
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void init() {
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if (fLooper) return;
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constexpr 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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SkScalar 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), SkIntToScalar(3) }
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};
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SkLayerDrawLooper::Builder looperBuilder;
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SkLayerDrawLooper::LayerInfo info;
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info.fPaintBits = SkLayerDrawLooper::kStyle_Bit | SkLayerDrawLooper::kMaskFilter_Bit;
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info.fColorMode = SkXfermode::kSrc_Mode;
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for (size_t i = 0; i < SK_ARRAY_COUNT(gParams); i++) {
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info.fOffset.set(gParams[i].fOffset, gParams[i].fOffset);
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SkPaint* paint = looperBuilder.addLayer(info);
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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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if (gParams[i].fBlur > 0) {
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paint->setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
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SkBlurMask::ConvertRadiusToSigma(gParams[i].fBlur)));
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}
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}
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fLooper = looperBuilder.detach();
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}
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new DrawLooperGM; )
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