TextBench.cpp revision f059900f75639f1b1a03f2c25333ef9aa22d58b8 
1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9#include "Benchmark.h"
10#include "Resources.h"
11#include "SkCanvas.h"
12#include "SkPaint.h"
13#include "SkRandom.h"
14#include "SkStream.h"
15#include "SkString.h"
16#include "SkTemplates.h"
17#include "SkTypeface.h"
18
19enum FontQuality {
20    kBW,
21    kAA,
22    kLCD,
23};
24
25static const char* fontQualityName(const SkPaint& paint) {
26    if (!paint.isAntiAlias()) {
27        return "BW";
28    }
29    if (paint.isLCDRenderText()) {
30        return "LCD";
31    }
32    return "AA";
33}
34
35/*  Some considerations for performance:
36        short -vs- long strings (measuring overhead)
37        tiny -vs- large pointsize (measure blit -vs- overhead)
38        1 -vs- many point sizes (measure cache lookup)
39        normal -vs- subpixel -vs- lineartext (minor)
40        force purge after each draw to measure scaler
41        textencoding?
42        text -vs- postext - pathtext
43 */
44class TextBench : public Benchmark {
45    SkPaint     fPaint;
46    SkString    fText;
47    SkString    fName;
48    FontQuality fFQ;
49    bool        fDoPos;
50    bool        fDoColorEmoji;
51    SkAutoTUnref<SkTypeface> fColorEmojiTypeface;
52    SkPoint*    fPos;
53public:
54    TextBench(const char text[], int ps,
55              SkColor color, FontQuality fq, bool doColorEmoji = false, bool doPos = false)
56        : fText(text)
57        , fFQ(fq)
58        , fDoPos(doPos)
59        , fDoColorEmoji(doColorEmoji)
60        , fPos(NULL) {
61        fPaint.setAntiAlias(kBW != fq);
62        fPaint.setLCDRenderText(kLCD == fq);
63        fPaint.setTextSize(SkIntToScalar(ps));
64        fPaint.setColor(color);
65    }
66
67    virtual ~TextBench() {
68        delete[] fPos;
69    }
70
71protected:
72    void onPreDraw() override {
73        if (fDoColorEmoji) {
74            SkASSERT(kBW == fFQ);
75            fColorEmojiTypeface.reset(GetResourceAsTypeface("/fonts/Funkster.ttf"));
76        }
77
78        if (fDoPos) {
79            size_t len = fText.size();
80            SkScalar* adv = new SkScalar[len];
81            fPaint.getTextWidths(fText.c_str(), len, adv);
82            fPos = new SkPoint[len];
83            SkScalar x = 0;
84            for (size_t i = 0; i < len; ++i) {
85                fPos[i].set(x, SkIntToScalar(50));
86                x += adv[i];
87            }
88            delete[] adv;
89        }
90    }
91
92
93    const char* onGetName() override {
94        fName.printf("text_%g", SkScalarToFloat(fPaint.getTextSize()));
95        if (fDoPos) {
96            fName.append("_pos");
97        }
98        fName.appendf("_%s", fontQualityName(fPaint));
99        if (SK_ColorBLACK != fPaint.getColor()) {
100            fName.appendf("_%02X", fPaint.getAlpha());
101        } else {
102            fName.append("_BK");
103        }
104
105        if (fDoColorEmoji) {
106            fName.append("_ColorEmoji");
107        }
108
109        return fName.c_str();
110    }
111
112    void onDraw(const int loops, SkCanvas* canvas) override {
113        const SkIPoint dim = this->getSize();
114        SkRandom rand;
115
116        SkPaint paint(fPaint);
117        this->setupPaint(&paint);
118        // explicitly need these
119        paint.setColor(fPaint.getColor());
120        paint.setAntiAlias(kBW != fFQ);
121        paint.setLCDRenderText(kLCD == fFQ);
122
123        if (fDoColorEmoji && fColorEmojiTypeface) {
124            paint.setTypeface(fColorEmojiTypeface);
125        }
126
127        const SkScalar x0 = SkIntToScalar(-10);
128        const SkScalar y0 = SkIntToScalar(-10);
129
130        if (fDoPos) {
131            // realistically, the matrix is often at least translated, so we
132            // do that since it exercises different code in drawPosText.
133            canvas->translate(SK_Scalar1, SK_Scalar1);
134        }
135
136        for (int i = 0; i < loops; i++) {
137            if (fDoPos) {
138                canvas->drawPosText(fText.c_str(), fText.size(), fPos, paint);
139            } else {
140                SkScalar x = x0 + rand.nextUScalar1() * dim.fX;
141                SkScalar y = y0 + rand.nextUScalar1() * dim.fY;
142                canvas->drawText(fText.c_str(), fText.size(), x, y, paint);
143            }
144        }
145    }
146
147private:
148    typedef Benchmark INHERITED;
149};
150
151///////////////////////////////////////////////////////////////////////////////
152
153#define STR     "Hamburgefons"
154
155DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kBW); )
156DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kBW); )
157DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kBW); )
158
159DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kAA); )
160DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kAA); )
161DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kAA); )
162
163DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kLCD); )
164DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kLCD); )
165DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kLCD); )
166
167DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kBW, true); )
168DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kBW, true); )
169DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kBW, true); )
170
171DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kBW, true, true); )
172DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kAA, false, true); )
173