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        fPos = NULL;
57        fFQ = fq;
58        fDoPos = doPos;
59        fDoColorEmoji = doColorEmoji;
60        fText.set(text);
61
62        fPaint.setAntiAlias(kBW != fq);
63        fPaint.setLCDRenderText(kLCD == fq);
64        fPaint.setTextSize(SkIntToScalar(ps));
65        fPaint.setColor(color);
66
67        if (doColorEmoji) {
68            SkASSERT(kBW == fFQ);
69            fColorEmojiTypeface.reset(GetResourceAsTypeface("/fonts/Funkster.ttf"));
70        }
71
72        if (doPos) {
73            size_t len = strlen(text);
74            SkScalar* adv = new SkScalar[len];
75            fPaint.getTextWidths(text, len, adv);
76            fPos = new SkPoint[len];
77            SkScalar x = 0;
78            for (size_t i = 0; i < len; ++i) {
79                fPos[i].set(x, SkIntToScalar(50));
80                x += adv[i];
81            }
82            delete[] adv;
83        }
84    }
85
86    virtual ~TextBench() {
87        delete[] fPos;
88    }
89
90protected:
91    virtual const char* onGetName() {
92        fName.printf("text_%g", SkScalarToFloat(fPaint.getTextSize()));
93        if (fDoPos) {
94            fName.append("_pos");
95        }
96        fName.appendf("_%s", fontQualityName(fPaint));
97        if (SK_ColorBLACK != fPaint.getColor()) {
98            fName.appendf("_%02X", fPaint.getAlpha());
99        } else {
100            fName.append("_BK");
101        }
102
103        if (fDoColorEmoji && fColorEmojiTypeface) {
104            fName.append("_ColorEmoji");
105        }
106
107        return fName.c_str();
108    }
109
110    virtual void onDraw(const int loops, SkCanvas* canvas) {
111        const SkIPoint dim = this->getSize();
112        SkRandom rand;
113
114        SkPaint paint(fPaint);
115        this->setupPaint(&paint);
116        // explicitly need these
117        paint.setColor(fPaint.getColor());
118        paint.setAntiAlias(kBW != fFQ);
119        paint.setLCDRenderText(kLCD == fFQ);
120
121        if (fDoColorEmoji && fColorEmojiTypeface) {
122            paint.setTypeface(fColorEmojiTypeface);
123        }
124
125        const SkScalar x0 = SkIntToScalar(-10);
126        const SkScalar y0 = SkIntToScalar(-10);
127
128        if (fDoPos) {
129            // realistically, the matrix is often at least translated, so we
130            // do that since it exercises different code in drawPosText.
131            canvas->translate(SK_Scalar1, SK_Scalar1);
132        }
133
134        for (int i = 0; i < loops; i++) {
135            if (fDoPos) {
136                canvas->drawPosText(fText.c_str(), fText.size(), fPos, paint);
137            } else {
138                SkScalar x = x0 + rand.nextUScalar1() * dim.fX;
139                SkScalar y = y0 + rand.nextUScalar1() * dim.fY;
140                canvas->drawText(fText.c_str(), fText.size(), x, y, paint);
141            }
142        }
143    }
144
145private:
146    typedef Benchmark INHERITED;
147};
148
149///////////////////////////////////////////////////////////////////////////////
150
151#define STR     "Hamburgefons"
152
153DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kBW); )
154DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kBW); )
155DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kBW); )
156
157DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kAA); )
158DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kAA); )
159DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kAA); )
160
161DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kLCD); )
162DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kLCD); )
163DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kLCD); )
164
165DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kBW, true); )
166DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kBW, true); )
167DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kBW, true); )
168
169DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kBW, true, true); )
170DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kAA, false, true); )
171