зеркало из https://github.com/mozilla/moz-skia.git
143 строки
3.5 KiB
C++
143 строки
3.5 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 "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkGraphics.h"
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#include "SkRandom.h"
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#include <pthread.h>
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static void call_measure() {
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SkPaint paint;
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uint16_t text[32];
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SkRandom rand;
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paint.setAntiAlias(true);
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paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
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for (int j = 0; j < SK_ARRAY_COUNT(text); j++)
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text[j] = (uint16_t)((rand.nextU() & 0xFF) + 32);
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for (int i = 9; i < 36; i++) {
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SkPaint::FontMetrics m;
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paint.setTextSize(SkIntToScalar(i));
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paint.getFontMetrics(&m);
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paint.measureText(text, sizeof(text));
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}
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}
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static void call_draw(SkCanvas* canvas) {
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SkPaint paint;
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uint16_t text[32];
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SkRandom rand;
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paint.setAntiAlias(true);
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paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
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for (int j = 0; j < SK_ARRAY_COUNT(text); j++)
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text[j] = (uint16_t)((rand.nextU() & 0xFF) + 32);
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SkScalar x = SkIntToScalar(10);
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SkScalar y = SkIntToScalar(20);
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canvas->drawColor(SK_ColorWHITE);
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for (int i = 9; i < 36; i++)
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{
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SkPaint::FontMetrics m;
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paint.setTextSize(SkIntToScalar(i));
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paint.getFontMetrics(&m);
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canvas->drawText(text, sizeof(text), x, y, paint);
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y += m.fDescent - m.fAscent;
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}
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}
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static bool gDone;
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static void* measure_proc(void* context) {
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while (!gDone) {
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call_measure();
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}
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return NULL;
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}
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static void* draw_proc(void* context) {
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SkBitmap* bm = (SkBitmap*)context;
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SkCanvas canvas(*bm);
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while (!gDone) {
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call_draw(&canvas);
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}
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return NULL;
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}
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class FontCacheView : public SampleView {
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public:
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enum { N = 4 };
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pthread_t fMThreads[N];
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pthread_t fDThreads[N];
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SkBitmap fBitmaps[N];
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FontCacheView() {
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gDone = false;
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for (int i = 0; i < N; i++) {
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int status;
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status = pthread_create(&fMThreads[i], NULL, measure_proc, NULL);
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SkASSERT(0 == status);
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fBitmaps[i].setConfig(SkBitmap::kRGB_565_Config, 320, 240);
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fBitmaps[i].allocPixels();
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status = pthread_create(&fDThreads[i], NULL, draw_proc, &fBitmaps[i]);
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SkASSERT(0 == status);
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}
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this->setBGColor(0xFFDDDDDD);
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}
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virtual ~FontCacheView() {
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gDone = true;
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for (int i = 0; i < N; i++) {
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void* ret;
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int status = pthread_join(fMThreads[i], &ret);
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SkASSERT(0 == status);
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status = pthread_join(fDThreads[i], &ret);
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SkASSERT(0 == status);
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}
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "FontCache");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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virtual void onDrawContent(SkCanvas* canvas) {
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SkScalar x = 0;
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SkScalar y = 0;
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for (int i = 0; i < N; i++) {
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canvas->drawBitmap(fBitmaps[i], x, y);
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x += SkIntToScalar(fBitmaps[i].width());
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}
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this->inval(NULL);
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}
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private:
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new FontCacheView; }
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static SkViewRegister reg(MyFactory);
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