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
136 lines
4.2 KiB
C++
136 lines
4.2 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 "SkCanvas.h"
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#include "SkGradientShader.h"
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namespace skiagm {
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static void makebm(SkBitmap* bm, int w, int h) {
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bm->allocN32Pixels(w, h);
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bm->eraseColor(SK_ColorTRANSPARENT);
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SkCanvas canvas(*bm);
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SkScalar s = SkIntToScalar(SkMin32(w, h));
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const SkPoint kPts0[] = { { 0, 0 }, { s, s } };
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const SkPoint kPts1[] = { { s/2, 0 }, { s/2, s } };
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const SkScalar kPos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
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const SkColor kColors0[] = {0x80F00080, 0xF0F08000, 0x800080F0 };
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const SkColor kColors1[] = {0xF08000F0, 0x8080F000, 0xF000F080 };
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeLinear(kPts0, kColors0, kPos,
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SK_ARRAY_COUNT(kColors0), SkShader::kClamp_TileMode));
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canvas.drawPaint(paint);
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paint.setShader(SkGradientShader::MakeLinear(kPts1, kColors1, kPos,
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SK_ARRAY_COUNT(kColors1), SkShader::kClamp_TileMode));
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canvas.drawPaint(paint);
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}
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///////////////////////////////////////////////////////////////////////////////
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struct LabeledMatrix {
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SkMatrix fMatrix;
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const char* fLabel;
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};
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constexpr char kText[] = "B";
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constexpr int kTextLen = SK_ARRAY_COUNT(kText) - 1;
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constexpr int kPointSize = 300;
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class ShaderText3GM : public GM {
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public:
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ShaderText3GM() {
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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("shadertext3");
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}
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SkISize onISize() override{ return SkISize::Make(820, 930); }
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void onOnceBeforeDraw() override {
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makebm(&fBmp, kPointSize / 4, kPointSize / 4);
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint bmpPaint;
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bmpPaint.setAntiAlias(true);
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bmpPaint.setFilterQuality(kLow_SkFilterQuality);
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bmpPaint.setAlpha(0x80);
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canvas->drawBitmap(fBmp, 5.f, 5.f, &bmpPaint);
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SkPaint outlinePaint;
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outlinePaint.setAntiAlias(true);
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sk_tool_utils::set_portable_typeface(&outlinePaint);
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outlinePaint.setTextSize(SkIntToScalar(kPointSize));
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outlinePaint.setStyle(SkPaint::kStroke_Style);
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outlinePaint.setStrokeWidth(0.f);
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canvas->translate(15.f, 15.f);
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// draw glyphs scaled up
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canvas->scale(2.f, 2.f);
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constexpr SkShader::TileMode kTileModes[] = {
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SkShader::kRepeat_TileMode,
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SkShader::kMirror_TileMode,
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};
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// position the baseline of the first run
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canvas->translate(0.f, 0.75f * kPointSize);
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canvas->save();
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int i = 0;
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for (size_t tm0 = 0; tm0 < SK_ARRAY_COUNT(kTileModes); ++tm0) {
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for (size_t tm1 = 0; tm1 < SK_ARRAY_COUNT(kTileModes); ++tm1) {
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SkMatrix localM;
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localM.setTranslate(5.f, 5.f);
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localM.postRotate(20);
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localM.postScale(1.15f, .85f);
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SkPaint fillPaint;
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fillPaint.setAntiAlias(true);
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sk_tool_utils::set_portable_typeface(&fillPaint);
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fillPaint.setTextSize(SkIntToScalar(kPointSize));
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fillPaint.setFilterQuality(kLow_SkFilterQuality);
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fillPaint.setShader(SkShader::MakeBitmapShader(fBmp, kTileModes[tm0],
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kTileModes[tm1], &localM));
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canvas->drawText(kText, kTextLen, 0, 0, fillPaint);
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canvas->drawText(kText, kTextLen, 0, 0, outlinePaint);
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SkScalar w = fillPaint.measureText(kText, kTextLen);
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canvas->translate(w + 10.f, 0.f);
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++i;
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if (!(i % 2)) {
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canvas->restore();
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canvas->translate(0, 0.75f * kPointSize);
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canvas->save();
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}
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}
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}
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canvas->restore();
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}
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private:
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SkBitmap fBmp;
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typedef GM INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new ShaderText3GM; }
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static GMRegistry reg(MyFactory);
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}
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