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
152 lines
3.8 KiB
C++
152 lines
3.8 KiB
C++
/*
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* Copyright 2012 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 "SkBlurMaskFilter.h"
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#include "SkCanvas.h"
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#include "SkPath.h"
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#include "SkShader.h"
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namespace skiagm {
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/**
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* Stress test the GPU samplers by rendering a textured glyph with a mask and
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* an AA clip
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*/
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class SamplerStressGM : public GM {
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public:
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SamplerStressGM()
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: fTextureCreated(false)
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, fMaskFilter(nullptr) {
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}
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protected:
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SkString onShortName() override {
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return SkString("gpusamplerstress");
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}
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SkISize onISize() override {
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return SkISize::Make(640, 480);
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}
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/**
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* Create a red & green stripes on black texture
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*/
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void createTexture() {
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if (fTextureCreated) {
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return;
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}
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constexpr int xSize = 16;
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constexpr int ySize = 16;
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fTexture.allocN32Pixels(xSize, ySize);
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SkPMColor* addr = fTexture.getAddr32(0, 0);
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for (int y = 0; y < ySize; ++y) {
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for (int x = 0; x < xSize; ++x) {
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addr[y*xSize+x] = SkPreMultiplyColor(SK_ColorBLACK);
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if ((y % 5) == 0) {
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addr[y*xSize+x] = SkPreMultiplyColor(SK_ColorRED);
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}
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if ((x % 7) == 0) {
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addr[y*xSize+x] = SkPreMultiplyColor(SK_ColorGREEN);
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}
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}
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}
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fTextureCreated = true;
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}
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void createShader() {
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if (fShader) {
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return;
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}
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createTexture();
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fShader = SkShader::MakeBitmapShader(fTexture, SkShader::kRepeat_TileMode,
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SkShader::kRepeat_TileMode);
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}
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void createMaskFilter() {
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if (fMaskFilter) {
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return;
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}
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const SkScalar sigma = 1;
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fMaskFilter = SkBlurMaskFilter::Make(kNormal_SkBlurStyle, sigma);
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}
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void onDraw(SkCanvas* canvas) override {
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createShader();
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createMaskFilter();
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canvas->save();
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// draw a letter "M" with a green & red striped texture and a
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// stipple mask with a round rect soft clip
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setTextSize(72);
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paint.setShader(fShader);
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paint.setMaskFilter(fMaskFilter);
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sk_tool_utils::set_portable_typeface(&paint);
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SkRect temp;
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temp.set(SkIntToScalar(115),
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SkIntToScalar(75),
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SkIntToScalar(144),
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SkIntToScalar(110));
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SkPath path;
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path.addRoundRect(temp, SkIntToScalar(5), SkIntToScalar(5));
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canvas->clipPath(path, SkRegion::kReplace_Op, true); // AA is on
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canvas->drawText("M", 1,
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SkIntToScalar(100), SkIntToScalar(100),
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paint);
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canvas->restore();
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// Now draw stroked versions of the "M" and the round rect so we can
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// see what is going on
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SkPaint paint2;
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paint2.setColor(SK_ColorBLACK);
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paint2.setAntiAlias(true);
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paint2.setTextSize(72);
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paint2.setStyle(SkPaint::kStroke_Style);
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paint2.setStrokeWidth(1);
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sk_tool_utils::set_portable_typeface(&paint2);
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canvas->drawText("M", 1,
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SkIntToScalar(100), SkIntToScalar(100),
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paint2);
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paint2.setColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
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canvas->drawPath(path, paint2);
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}
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private:
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SkBitmap fTexture;
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bool fTextureCreated;
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sk_sp<SkShader> fShader;
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sk_sp<SkMaskFilter> fMaskFilter;
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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 SamplerStressGM; }
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static GMRegistry reg(MyFactory);
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}
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