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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("serif", SkFontStyle::Italic()));
     60 
     61         for (int work = 0; work < loops; work++) {
     62             do_font_stuff(&paint);
     63         }
     64         SkGraphics::SetFontCacheLimit(oldCacheLimitSize);
     65     }
     66 
     67 private:
     68     typedef Benchmark INHERITED;
     69     const size_t fCacheSize;
     70     SkString fName;
     71 };
     72 
     73 class SkGlyphCacheStressTest : public Benchmark {
     74 public:
     75     explicit SkGlyphCacheStressTest(int cacheSize) : fCacheSize(cacheSize) { }
     76 
     77 protected:
     78     const char* onGetName() override {
     79         fName.printf("SkGlyphCacheStressTest%dK", (int)(fCacheSize >> 10));
     80         return fName.c_str();
     81     }
     82 
     83     bool isSuitableFor(Backend backend) override {
     84         return backend == kNonRendering_Backend;
     85     }
     86 
     87     void onDraw(int loops, SkCanvas*) override {
     88         size_t oldCacheLimitSize = SkGraphics::GetFontCacheLimit();
     89         SkGraphics::SetFontCacheLimit(fCacheSize);
     90         sk_sp<SkTypeface> typefaces[] =
     91             {sk_tool_utils::create_portable_typeface("serif", SkFontStyle::Italic()),
     92              sk_tool_utils::create_portable_typeface("sans-serif", SkFontStyle::Italic())};
     93 
     94         for (int work = 0; work < loops; work++) {
     95             SkTaskGroup().batch(16, [&](int threadIndex) {
     96                 SkPaint paint;
     97                 paint.setAntiAlias(true);
     98                 paint.setSubpixelText(true);
     99                 paint.setTypeface(typefaces[threadIndex % 2]);
    100                 do_font_stuff(&paint);
    101             });
    102         }
    103         SkGraphics::SetFontCacheLimit(oldCacheLimitSize);
    104     }
    105 
    106 private:
    107     typedef Benchmark INHERITED;
    108     const size_t fCacheSize;
    109     SkString fName;
    110 };
    111 
    112 DEF_BENCH( return new SkGlyphCacheBasic(256 * 1024); )
    113 DEF_BENCH( return new SkGlyphCacheBasic(32 * 1024 * 1024); )
    114 DEF_BENCH( return new SkGlyphCacheStressTest(256 * 1024); )
    115 DEF_BENCH( return new SkGlyphCacheStressTest(32 * 1024 * 1024); )
    116