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      1 /*
      2  * Copyright 2015 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 
      9 #include "SkGlyphCache.h"
     10 
     11 #include "Benchmark.h"
     12 #include "SkCanvas.h"
     13 #include "SkGlyphCache_Globals.h"
     14 #include "SkGraphics.h"
     15 #include "SkTaskGroup.h"
     16 #include "SkTypeface.h"
     17 #include "sk_tool_utils.h"
     18 
     19 
     20 static void do_font_stuff(SkPaint* paint) {
     21     for (SkScalar i = 8; i < 64; i++) {
     22         paint->setTextSize(i);
     23         SkAutoGlyphCacheNoGamma autoCache(*paint, nullptr, nullptr);
     24         SkGlyphCache* cache = autoCache.getCache();
     25         uint16_t glyphs['z'];
     26         for (int c = ' '; c < 'z'; c++) {
     27             glyphs[c] = cache->unicharToGlyph(c);
     28         }
     29         for (int lookups = 0; lookups < 10; lookups++) {
     30             for (int c = ' '; c < 'z'; c++) {
     31                 const SkGlyph& g = cache->getGlyphIDMetrics(glyphs[c]);
     32                 cache->findImage(g);
     33             }
     34         }
     35 
     36     }
     37 }
     38 
     39 class SkGlyphCacheBasic : public Benchmark {
     40 public:
     41     explicit SkGlyphCacheBasic(size_t cacheSize) : fCacheSize(cacheSize) { }
     42 
     43 protected:
     44     const char* onGetName() override {
     45         fName.printf("SkGlyphCacheBasic%dK", (int)(fCacheSize >> 10));
     46         return fName.c_str();
     47     }
     48 
     49     bool isSuitableFor(Backend backend) override {
     50         return backend == kNonRendering_Backend;
     51     }
     52 
     53     void onDraw(int loops, SkCanvas*) override {
     54         size_t oldCacheLimitSize = SkGraphics::GetFontCacheLimit();
     55         SkGraphics::SetFontCacheLimit(fCacheSize);
     56         SkPaint paint;
     57         paint.setAntiAlias(true);
     58         paint.setSubpixelText(true);
     59         paint.setTypeface(sk_tool_utils::create_portable_typeface(
     60                               "serif", SkFontStyle::FromOldStyle(SkTypeface::kItalic)));
     61 
     62         for (int work = 0; work < loops; work++) {
     63             do_font_stuff(&paint);
     64         }
     65         SkGraphics::SetFontCacheLimit(oldCacheLimitSize);
     66     }
     67 
     68 private:
     69     typedef Benchmark INHERITED;
     70     const size_t fCacheSize;
     71     SkString fName;
     72 };
     73 
     74 class SkGlyphCacheStressTest : public Benchmark {
     75 public:
     76     explicit SkGlyphCacheStressTest(int cacheSize) : fCacheSize(cacheSize) { }
     77 
     78 protected:
     79     const char* onGetName() override {
     80         fName.printf("SkGlyphCacheStressTest%dK", (int)(fCacheSize >> 10));
     81         return fName.c_str();
     82     }
     83 
     84     bool isSuitableFor(Backend backend) override {
     85         return backend == kNonRendering_Backend;
     86     }
     87 
     88     void onDraw(int loops, SkCanvas*) override {
     89         size_t oldCacheLimitSize = SkGraphics::GetFontCacheLimit();
     90         SkGraphics::SetFontCacheLimit(fCacheSize);
     91         sk_sp<SkTypeface> typefaces[] =
     92             {sk_tool_utils::create_portable_typeface("serif",
     93                   SkFontStyle::FromOldStyle(SkTypeface::kItalic)),
     94              sk_tool_utils::create_portable_typeface("sans-serif",
     95                   SkFontStyle::FromOldStyle(SkTypeface::kItalic))};
     96 
     97         for (int work = 0; work < loops; work++) {
     98             SkTaskGroup().batch(16, [&](int threadIndex) {
     99                 SkPaint paint;
    100                 paint.setAntiAlias(true);
    101                 paint.setSubpixelText(true);
    102                 paint.setTypeface(typefaces[threadIndex % 2]);
    103                 do_font_stuff(&paint);
    104             });
    105         }
    106         SkGraphics::SetFontCacheLimit(oldCacheLimitSize);
    107     }
    108 
    109 private:
    110     typedef Benchmark INHERITED;
    111     const size_t fCacheSize;
    112     SkString fName;
    113 };
    114 
    115 DEF_BENCH( return new SkGlyphCacheBasic(256 * 1024); )
    116 DEF_BENCH( return new SkGlyphCacheBasic(32 * 1024 * 1024); )
    117 DEF_BENCH( return new SkGlyphCacheStressTest(256 * 1024); )
    118 DEF_BENCH( return new SkGlyphCacheStressTest(32 * 1024 * 1024); )
    119