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