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