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
101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
/*
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* Copyright 2015 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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/*
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* Tests overlapping LCD text
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*/
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#include "gm.h"
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#include "SkCanvas.h"
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#include "SkSurface.h"
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#include "SkTextBlob.h"
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namespace skiagm {
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constexpr int kWidth = 750;
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constexpr int kHeight = 750;
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class LcdOverlapGM : public skiagm::GM {
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public:
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LcdOverlapGM() {
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const int kPointSize = 25;
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fTextHeight = SkIntToScalar(kPointSize);
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}
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protected:
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SkString onShortName() override {
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return SkString("lcdoverlap");
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}
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void onOnceBeforeDraw() override {
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// build text blob
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SkTextBlobBuilder builder;
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SkPaint paint;
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sk_tool_utils::set_portable_typeface(&paint);
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paint.setTextSize(32);
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const char* text = "able was I ere I saw elba";
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paint.setAntiAlias(true);
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paint.setSubpixelText(true);
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paint.setLCDRenderText(true);
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0);
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fBlob.reset(builder.build());
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}
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SkISize onISize() override { return SkISize::Make(kWidth, kHeight); }
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void drawTestCase(SkCanvas* canvas, SkScalar x, SkScalar y, SkXfermode::Mode mode,
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SkXfermode::Mode mode2) {
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const SkColor colors[] {
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SK_ColorRED,
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SK_ColorGREEN,
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SK_ColorBLUE,
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SK_ColorYELLOW,
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SK_ColorCYAN,
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SK_ColorMAGENTA,
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};
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sk_sp<SkXfermode> xfermode(SkXfermode::Make(mode));
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sk_sp<SkXfermode> xfermode2(SkXfermode::Make(mode2));
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for (size_t i = 0; i < SK_ARRAY_COUNT(colors); i++) {
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canvas->save();
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canvas->translate(x, y);
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canvas->rotate(360.0f / SK_ARRAY_COUNT(colors) * i);
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canvas->translate(-fBlob->bounds().width() / 2.0f + 0.5f, 0);
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SkPaint textPaint;
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textPaint.setColor(colors[i]);
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textPaint.setXfermode(i % 2 == 0 ? xfermode : xfermode2);
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canvas->drawTextBlob(fBlob, 0, 0, textPaint);
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canvas->restore();
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}
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}
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void onDraw(SkCanvas* canvas) override {
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SkScalar offsetX = kWidth / 4.0f;
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SkScalar offsetY = kHeight / 4.0f;
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drawTestCase(canvas, offsetX, offsetY, SkXfermode::kSrc_Mode, SkXfermode::kSrc_Mode);
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drawTestCase(canvas, 3 * offsetX, offsetY, SkXfermode::kSrcOver_Mode,
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SkXfermode::kSrcOver_Mode);
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drawTestCase(canvas, offsetX, 3 * offsetY, SkXfermode::kHardLight_Mode,
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SkXfermode::kLuminosity_Mode);
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drawTestCase(canvas, 3 * offsetX, 3 * offsetY, SkXfermode::kSrcOver_Mode,
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SkXfermode::kSrc_Mode);
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}
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private:
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SkScalar fTextHeight;
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SkAutoTUnref<const SkTextBlob> fBlob;
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typedef skiagm::GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new LcdOverlapGM; )
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}
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