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
102 lines
3.0 KiB
C++
102 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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#include "gm.h"
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#include "Resources.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkStream.h"
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#include "SkTextBlob.h"
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#include "SkTypeface.h"
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namespace skiagm {
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class TextBlobColorTrans : public GM {
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public:
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// This gm tests that textblobs can be translated and have their colors regenerated
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// correctly. With smaller atlas sizes, it can also trigger regeneration of texture coords on
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// the GPU backend
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TextBlobColorTrans() { }
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protected:
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void onOnceBeforeDraw() override {
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SkTextBlobBuilder builder;
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// make textblob
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// Large text is used to trigger atlas eviction
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SkPaint paint;
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paint.setTextSize(256);
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const char* text = "AB";
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sk_tool_utils::set_portable_typeface(&paint);
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SkRect bounds;
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paint.measureText(text, strlen(text), &bounds);
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SkScalar yOffset = bounds.height();
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 30);
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// A8
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paint.setTextSize(28);
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text = "The quick brown fox jumps over the lazy dog.";
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paint.setSubpixelText(false);
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paint.setLCDRenderText(false);
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paint.measureText(text, strlen(text), &bounds);
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 8);
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// build
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fBlob.reset(builder.build());
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}
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SkString onShortName() override {
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return SkString("textblobcolortrans");
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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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canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
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SkPaint paint;
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canvas->translate(10, 40);
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SkRect bounds = fBlob->bounds();
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// Colors were chosen to map to pairs of canonical colors. The GPU Backend will cache A8
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// Texture Blobs based on the canonical color they map to. Canonical colors are used to
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// create masks. For A8 there are 8 of them.
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SkColor colors[] = {SK_ColorCYAN, sk_tool_utils::color_to_565(SK_ColorLTGRAY),
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SK_ColorYELLOW, SK_ColorWHITE};
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size_t count = SK_ARRAY_COUNT(colors);
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size_t colorIndex = 0;
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for (int y = 0; y + SkScalarFloorToInt(bounds.height()) < kHeight;
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y += SkScalarFloorToInt(bounds.height())) {
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paint.setColor(colors[colorIndex++ % count]);
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canvas->save();
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canvas->translate(0, SkIntToScalar(y));
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canvas->drawTextBlob(fBlob, 0, 0, paint);
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canvas->restore();
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}
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}
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private:
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SkAutoTUnref<const SkTextBlob> fBlob;
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static constexpr int kWidth = 675;
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static constexpr int kHeight = 1600;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new TextBlobColorTrans;)
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}
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