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/*
* Copyright 2011 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 "SkPaint.h"
#include "SkRandom.h"
#include "SkString.h"
#include "SkTemplates.h"
enum FontQuality {
kBW,
kAA,
kLCD
};
static const char* fontQualityName(const SkPaint& paint) {
if (!paint.isAntiAlias()) {
return "BW";
}
if (paint.isLCDRenderText()) {
return "LCD";
}
return "AA";
}
/* Some considerations for performance:
short -vs- long strings (measuring overhead)
tiny -vs- large pointsize (measure blit -vs- overhead)
1 -vs- many point sizes (measure cache lookup)
normal -vs- subpixel -vs- lineartext (minor)
force purge after each draw to measure scaler
textencoding?
text -vs- postext - pathtext
*/
class TextBench : public Benchmark {
SkPaint fPaint;
SkString fText;
SkString fName;
FontQuality fFQ;
bool fDoPos;
SkPoint* fPos;
public:
TextBench(const char text[], int ps,
SkColor color, FontQuality fq, bool doPos = false) {
fPos = NULL;
fFQ = fq;
fDoPos = doPos;
fText.set(text);
fPaint.setAntiAlias(kBW != fq);
fPaint.setLCDRenderText(kLCD == fq);
fPaint.setTextSize(SkIntToScalar(ps));
fPaint.setColor(color);
if (doPos) {
size_t len = strlen(text);
SkScalar* adv = new SkScalar[len];
fPaint.getTextWidths(text, len, adv);
fPos = new SkPoint[len];
SkScalar x = 0;
for (size_t i = 0; i < len; ++i) {
fPos[i].set(x, SkIntToScalar(50));
x += adv[i];
}
delete[] adv;
}
}
virtual ~TextBench() {
delete[] fPos;
}
protected:
virtual const char* onGetName() {
fName.printf("text_%g", SkScalarToFloat(fPaint.getTextSize()));
if (fDoPos) {
fName.append("_pos");
}
fName.appendf("_%s", fontQualityName(fPaint));
if (SK_ColorBLACK != fPaint.getColor()) {
fName.appendf("_%02X", fPaint.getAlpha());
} else {
fName.append("_BK");
}
return fName.c_str();
}
virtual void onDraw(const int loops, SkCanvas* canvas) {
const SkIPoint dim = this->getSize();
SkRandom rand;
SkPaint paint(fPaint);
this->setupPaint(&paint);
// explicitly need these
paint.setColor(fPaint.getColor());
paint.setAntiAlias(kBW != fFQ);
paint.setLCDRenderText(kLCD == fFQ);
const SkScalar x0 = SkIntToScalar(-10);
const SkScalar y0 = SkIntToScalar(-10);
if (fDoPos) {
// realistically, the matrix is often at least translated, so we
// do that since it exercises different code in drawPosText.
canvas->translate(SK_Scalar1, SK_Scalar1);
}
for (int i = 0; i < loops; i++) {
if (fDoPos) {
canvas->drawPosText(fText.c_str(), fText.size(), fPos, paint);
} else {
SkScalar x = x0 + rand.nextUScalar1() * dim.fX;
SkScalar y = y0 + rand.nextUScalar1() * dim.fY;
canvas->drawText(fText.c_str(), fText.size(), x, y, paint);
}
}
}
private:
typedef Benchmark INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
#define STR "Hamburgefons"
DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kBW); )
DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kBW); )
DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kBW); )
DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kAA); )
DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kAA); )
DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kAA); )
DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kLCD); )
DEF_BENCH( return new TextBench(STR, 16, 0xFFFF0000, kLCD); )
DEF_BENCH( return new TextBench(STR, 16, 0x88FF0000, kLCD); )
DEF_BENCH( return new TextBench(STR, 16, 0xFF000000, kAA, true); )
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