86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
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/*
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* Copyright 2020 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 "include/core/SkFont.h"
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#include "include/core/SkTypeface.h"
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#include "src/core/SkScalerCache.h"
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#include "src/core/SkStrikeSpec.h"
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#include "src/core/SkTaskGroup.h"
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#include "tests/Test.h"
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#include "tools/ToolUtils.h"
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#include <atomic>
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class Barrier {
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public:
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Barrier(int threadCount) : fThreadCount(threadCount) { }
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void waitForAll() {
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fThreadCount -= 1;
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while (fThreadCount > 0) { }
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}
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private:
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std::atomic<int> fThreadCount;
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};
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DEF_TEST(SkScalerCacheMultiThread, Reporter) {
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sk_sp<SkTypeface> typeface =
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ToolUtils::create_portable_typeface("serif", SkFontStyle::Italic());
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static constexpr int kThreadCount = 4;
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Barrier barrier{kThreadCount};
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SkFont font;
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font.setEdging(SkFont::Edging::kAntiAlias);
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font.setSubpixel(true);
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font.setTypeface(typeface);
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SkGlyphID glyphs['z'];
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SkPoint pos['z'];
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for (int c = ' '; c < 'z'; c++) {
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glyphs[c] = font.unicharToGlyph(c);
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pos[c] = {30.0f * c + 30, 30.0f};
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}
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constexpr size_t glyphCount = 'z' - ' ';
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auto data = SkMakeZip(glyphs, pos).subspan(SkTo<int>(' '), glyphCount);
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SkPaint defaultPaint;
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SkStrikeSpec strikeSpec = SkStrikeSpec::MakeMask(
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font, defaultPaint, SkSurfaceProps(0, kUnknown_SkPixelGeometry),
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SkScalerContextFlags::kNone, SkMatrix::I());
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// Make our own executor so the --threads parameter doesn't mess things up.
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auto executor = SkExecutor::MakeFIFOThreadPool(kThreadCount);
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for (int tries = 0; tries < 100; tries++) {
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SkScalerContextEffects effects;
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std::unique_ptr<SkScalerContext> ctx{
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typeface->createScalerContext(effects, &strikeSpec.descriptor())};
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SkScalerCache scalerCache{strikeSpec.descriptor(), std::move(ctx)};
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auto perThread = [&](int threadIndex) {
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barrier.waitForAll();
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auto local = data.subspan(threadIndex * 2, data.size() - kThreadCount * 2);
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for (int i = 0; i < 100; i++) {
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SkDrawableGlyphBuffer drawable;
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SkSourceGlyphBuffer rejects;
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drawable.ensureSize(glyphCount);
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rejects.setSource(local);
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drawable.startBitmapDevice(rejects.source(), {0, 0}, SkMatrix::I(),
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scalerCache.roundingSpec());
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scalerCache.prepareForMaskDrawing(&drawable, &rejects);
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rejects.flipRejectsToSource();
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drawable.reset();
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}
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};
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SkTaskGroup(*executor).batch(kThreadCount, perThread);
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}
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}
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