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
115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
/*
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* Copyright 2013 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 "SkPath.h"
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namespace skiagm {
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// This GM exercises the blurred rect nine-patching special cases when the
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// blurred rect is very large and/or very far from the origin.
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// It creates a large blurred rect/rectori then renders the 4 corners and the
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// middle.
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class BigBlursGM : public GM {
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public:
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BigBlursGM() {
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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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SkString onShortName() override {
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return SkString("bigblurs");
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}
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SkISize onISize() override {
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return SkISize::Make(kWidth, kHeight);
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}
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void onDraw(SkCanvas* canvas) override {
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constexpr int kBig = 65536;
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const SkScalar kSigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(4));
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const SkRect bigRect = SkRect::MakeWH(SkIntToScalar(kBig), SkIntToScalar(kBig));
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SkRect insetRect = bigRect;
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insetRect.inset(20, 20);
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SkPath rectori;
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rectori.addRect(bigRect);
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rectori.addRect(insetRect, SkPath::kCCW_Direction);
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// The blur extends 3*kSigma out from the big rect.
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// Offset the close-up windows so we get the entire blur
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const SkScalar kLeftTopPad = 3*kSigma; // use on left & up of big rect
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const SkScalar kRightBotPad = kCloseUpSize-3*kSigma; // use on right and bot sides
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// UL hand corners of the rendered closeups
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const SkPoint origins[] = {
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{ -kLeftTopPad, -kLeftTopPad }, // UL
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{ kBig-kRightBotPad, -kLeftTopPad }, // UR
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{ kBig-kRightBotPad, kBig-kRightBotPad }, // LR
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{ -kLeftTopPad, kBig-kRightBotPad }, // LL
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{ kBig/2-kCloseUpSize/2, kBig/2-kCloseUpSize/2 }, // center
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};
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SkPaint outlinePaint;
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outlinePaint.setColor(SK_ColorRED);
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outlinePaint.setStyle(SkPaint::kStroke_Style);
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SkPaint blurPaint;
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blurPaint.setAntiAlias(true);
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blurPaint.setColor(SK_ColorBLACK);
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int desiredX = 0, desiredY = 0;
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for (int i = 0; i < 2; ++i) {
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for (int j = 0; j <= kLastEnum_SkBlurStyle; ++j) {
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blurPaint.setMaskFilter(SkBlurMaskFilter::Make((SkBlurStyle)j, kSigma));
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for (int k = 0; k < (int)SK_ARRAY_COUNT(origins); ++k) {
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canvas->save();
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SkRect clipRect = SkRect::MakeXYWH(SkIntToScalar(desiredX),
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SkIntToScalar(desiredY),
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SkIntToScalar(kCloseUpSize),
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SkIntToScalar(kCloseUpSize));
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canvas->clipRect(clipRect, SkRegion::kReplace_Op, false);
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canvas->translate(desiredX-origins[k].fX,
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desiredY-origins[k].fY);
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if (0 == i) {
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canvas->drawRect(bigRect, blurPaint);
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} else {
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canvas->drawPath(rectori, blurPaint);
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}
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canvas->restore();
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canvas->drawRect(clipRect, outlinePaint);
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desiredX += kCloseUpSize;
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}
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desiredX = 0;
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desiredY += kCloseUpSize;
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}
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}
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}
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private:
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static constexpr int kCloseUpSize = 64;
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static constexpr int kWidth = 5 * kCloseUpSize;
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static constexpr int kHeight = 2 * (kLastEnum_SkBlurStyle + 1) * kCloseUpSize;
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typedef GM INHERITED;
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};
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DEF_GM(return new BigBlursGM;)
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}
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