1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Benchmark.h"
#include "SkCanvas.h"
#include "SkGlyphCache.h"
#include "SkPaint.h"
#include "SkPath.h"
#include "SkRandom.h"
static constexpr int kScreenWidth = 1500;
static constexpr int kScreenHeight = 1500;
static constexpr int kNumDraws = 2000;
// I and l are rects on OS X.
static constexpr char kGlyphs[] = "ABCDEFGH7JKLMNOPQRSTUVWXYZabcdefghijk1mnopqrstuvwxyz";
static constexpr int kNumGlyphs = sizeof(kGlyphs) - 1;
static_assert(52 == kNumGlyphs, "expected 52 glyphs");
/*
* This class benchmarks drawing many glyphs at random scales and rotations.
*/
class PathTextBench : public Benchmark {
public:
bool isVisual() override { return true; }
private:
const char* onGetName() override {
return "path_text";
}
SkIPoint onGetSize() override { return SkIPoint::Make(kScreenWidth, kScreenHeight); }
void onDelayedSetup() override {
SkPaint defaultPaint;
SkAutoGlyphCache agc(defaultPaint, nullptr, &SkMatrix::I());
SkGlyphCache* cache = agc.getCache();
for (int i = 0; i < kNumGlyphs; ++i) {
SkGlyphID id = cache->unicharToGlyph(kGlyphs[i]);
cache->getScalerContext()->getPath(SkPackedGlyphID(id), &fGlyphs[i]);
}
SkRandom rand;
for (int i = 0; i < kNumDraws; ++i) {
const SkPath& glyph = fGlyphs[i % kNumGlyphs];
const SkRect& bounds = glyph.getBounds();
float glyphSize = SkTMax(bounds.width(), bounds.height());
float t0 = pow(rand.nextF(), 100);
float size = (1 - t0) * SkTMin(kScreenWidth, kScreenHeight) / 50 +
t0 * SkTMin(kScreenWidth, kScreenHeight) / 3;
float scale = size / glyphSize;
float t1 = rand.nextF(), t2 = rand.nextF();
fXforms[i].setTranslate((1 - t1) * sqrt(2) * scale/2 * glyphSize +
t1 * (kScreenWidth - sqrt(2) * scale/2 * glyphSize),
(1 - t2) * sqrt(2) * scale/2 * glyphSize +
t2 * (kScreenHeight - sqrt(2) * scale/2 * glyphSize));
fXforms[i].preRotate(rand.nextF() * 360);
fXforms[i].preTranslate(-scale/2 * bounds.width(), -scale/2 * bounds.height());
fXforms[i].preScale(scale, scale);
fPaints[i].setAntiAlias(true);
fPaints[i].setColor(rand.nextU() | 0x80808080);
}
}
void onDraw(int loops, SkCanvas* canvas) override {
SkAutoCanvasRestore acr(canvas, true);
for (int i = 0; i < kNumDraws; ++i) {
const SkPath& glyph = fGlyphs[i % kNumGlyphs];
canvas->setMatrix(fXforms[i]);
canvas->drawPath(glyph, fPaints[i]);
}
}
SkPath fGlyphs[kNumGlyphs];
SkPaint fPaints[kNumDraws];
SkMatrix fXforms[kNumDraws];
typedef Benchmark INHERITED;
};
DEF_BENCH(return new PathTextBench;)
|
