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
141 lines
4.1 KiB
C++
141 lines
4.1 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 "SkCanvas.h"
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#include "SkPath.h"
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#include "SkDashPathEffect.h"
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static SkPath generate_square(SkScalar cx, SkScalar cy, SkScalar w) {
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SkRect rect = SkRect::MakeXYWH(cx - w / 2, cy - w / 2, w, w);
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SkPath path;
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path.addRect(rect);
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return path;
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}
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static SkPath generate_rect_line(SkScalar cx, SkScalar cy, SkScalar l) {
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SkRect rect = SkRect::MakeXYWH(cx - l / 2, cy, l, 0);
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SkPath path;
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path.addRect(rect);
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return path;
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}
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static SkPath generate_circle(SkScalar cx, SkScalar cy, SkScalar d) {
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SkPath path;
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path.addCircle(cx, cy, d/2, SkPath::kCW_Direction);
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return path;
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}
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static SkPath generate_line(SkScalar cx, SkScalar cy, SkScalar l) {
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SkPath path;
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path.moveTo(cx - l / 2, cy);
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path.lineTo(cx + l / 2, cy);
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return path;
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}
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namespace {
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struct Style {
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Style(SkPaint::Style paintStyle, sk_sp<SkPathEffect> pe = sk_sp<SkPathEffect>())
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: fPaintStyle(paintStyle)
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, fPathEffect(std::move(pe)) {}
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SkPaint::Style fPaintStyle;
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sk_sp<SkPathEffect> fPathEffect;
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};
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sk_sp<SkPathEffect> make_dash() {
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constexpr SkScalar kIntervals[] = { 4.f, 3.f };
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return SkDashPathEffect::Make(kIntervals, SK_ARRAY_COUNT(kIntervals), 0);
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}
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Style styles[] {
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{SkPaint::kStroke_Style},
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{SkPaint::kStrokeAndFill_Style},
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{SkPaint::kFill_Style},
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{SkPaint::kStroke_Style, make_dash()},
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};
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SkScalar pathSizes[] = {
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40,
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10,
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0
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};
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SkScalar strokeWidths[] = {
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10,
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0
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};
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SkPath ((*paths[])(SkScalar, SkScalar, SkScalar)) = {
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generate_square,
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generate_rect_line,
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generate_circle,
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generate_line
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};
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const SkScalar slideWidth = 90, slideHeight = 90;
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const SkScalar slideBoundary = 5;
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} // namespace
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DEF_SIMPLE_GM(inverse_paths, canvas, 800, 1200) {
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SkScalar cx = slideWidth / 2 + slideBoundary;
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SkScalar cy = slideHeight / 2 + slideBoundary;
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SkScalar dx = slideWidth + 2 * slideBoundary;
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SkScalar dy = slideHeight + 2 * slideBoundary;
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SkRect clipRect = SkRect::MakeLTRB(slideBoundary, slideBoundary,
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slideBoundary + slideWidth,
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slideBoundary + slideHeight);
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SkPaint clipPaint;
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clipPaint.setStyle(SkPaint::kStroke_Style);
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clipPaint.setStrokeWidth(SkIntToScalar(2));
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SkPaint outlinePaint;
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outlinePaint.setColor(0x40000000);
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outlinePaint.setStyle(SkPaint::kStroke_Style);
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outlinePaint.setStrokeWidth(SkIntToScalar(0));
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for (size_t styleIndex = 0; styleIndex < SK_ARRAY_COUNT(styles);
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styleIndex++) {
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for (size_t sizeIndex = 0; sizeIndex < SK_ARRAY_COUNT(pathSizes);
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sizeIndex++) {
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SkScalar size = pathSizes[sizeIndex];
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canvas->save();
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for (size_t widthIndex = 0;
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widthIndex < SK_ARRAY_COUNT(strokeWidths);
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widthIndex++) {
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SkPaint paint;
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paint.setColor(0xff007000);
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paint.setStrokeWidth(strokeWidths[widthIndex]);
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paint.setStyle(styles[styleIndex].fPaintStyle);
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paint.setPathEffect(styles[styleIndex].fPathEffect);
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for (size_t pathIndex = 0;
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pathIndex < SK_ARRAY_COUNT(paths);
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pathIndex++) {
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canvas->drawRect(clipRect, clipPaint);
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canvas->save();
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canvas->clipRect(clipRect);
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SkPath path = paths[pathIndex](cx, cy, size);
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path.setFillType(SkPath::kInverseWinding_FillType);
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canvas->drawPath(path, paint);
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path.setFillType(SkPath::kWinding_FillType);
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canvas->drawPath(path, outlinePaint);
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canvas->restore();
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canvas->translate(dx, 0);
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}
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}
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canvas->restore();
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canvas->translate(0, dy);
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}
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}
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}
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