grab from latest android
git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleFontCache.cpp b/samplecode/SampleFontCache.cpp
new file mode 100644
index 0000000..fb63f71
--- /dev/null
+++ b/samplecode/SampleFontCache.cpp
@@ -0,0 +1,171 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGraphics.h"
+#include "SkRandom.h"
+
+#include <pthread.h>
+
+static void call_measure()
+{
+ SkPaint paint;
+ uint16_t text[32];
+ SkRandom rand;
+
+ paint.setAntiAlias(true);
+ paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
+ for (int j = 0; j < SK_ARRAY_COUNT(text); j++)
+ text[j] = (uint16_t)((rand.nextU() & 0xFF) + 32);
+
+ for (int i = 9; i < 36; i++)
+ {
+ SkPaint::FontMetrics m;
+
+ paint.setTextSize(SkIntToScalar(i));
+ paint.getFontMetrics(&m);
+ paint.measureText(text, sizeof(text));
+ }
+}
+
+static void call_draw(SkCanvas* canvas)
+{
+ SkPaint paint;
+ uint16_t text[32];
+ SkRandom rand;
+
+ paint.setAntiAlias(true);
+ paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
+ for (int j = 0; j < SK_ARRAY_COUNT(text); j++)
+ text[j] = (uint16_t)((rand.nextU() & 0xFF) + 32);
+
+ SkScalar x = SkIntToScalar(10);
+ SkScalar y = SkIntToScalar(20);
+
+ canvas->drawColor(SK_ColorWHITE);
+ for (int i = 9; i < 36; i++)
+ {
+ SkPaint::FontMetrics m;
+
+ paint.setTextSize(SkIntToScalar(i));
+ paint.getFontMetrics(&m);
+ canvas->drawText(text, sizeof(text), x, y, paint);
+ y += m.fDescent - m.fAscent;
+ }
+}
+
+static bool gDone;
+
+static void* measure_proc(void* context)
+{
+ while (!gDone)
+ {
+ call_measure();
+ }
+ return NULL;
+}
+
+static void* draw_proc(void* context)
+{
+ SkBitmap* bm = (SkBitmap*)context;
+ SkCanvas canvas(*bm);
+
+ while (!gDone)
+ {
+ call_draw(&canvas);
+ }
+ return NULL;
+}
+
+class FontCacheView : public SkView {
+public:
+ enum { N = 4 };
+
+ pthread_t fMThreads[N];
+ pthread_t fDThreads[N];
+ SkBitmap fBitmaps[N];
+
+ FontCacheView()
+ {
+ gDone = false;
+ for (int i = 0; i < N; i++)
+ {
+ int status;
+ pthread_attr_t attr;
+
+ status = pthread_attr_init(&attr);
+ SkASSERT(0 == status);
+ status = pthread_create(&fMThreads[i], &attr, measure_proc, NULL);
+ SkASSERT(0 == status);
+
+ fBitmaps[i].setConfig(SkBitmap::kRGB_565_Config, 320, 240);
+ fBitmaps[i].allocPixels();
+ status = pthread_create(&fDThreads[i], &attr, draw_proc, &fBitmaps[i]);
+ SkASSERT(0 == status);
+ }
+ }
+
+ virtual ~FontCacheView()
+ {
+ gDone = true;
+ for (int i = 0; i < N; i++)
+ {
+ void* ret;
+ int status = pthread_join(fMThreads[i], &ret);
+ SkASSERT(0 == status);
+ status = pthread_join(fDThreads[i], &ret);
+ SkASSERT(0 == status);
+ }
+ }
+
+protected:
+ // overrides from SkEventSink
+ virtual bool onQuery(SkEvent* evt)
+ {
+ if (SampleCode::TitleQ(*evt))
+ {
+ SampleCode::TitleR(evt, "FontCache");
+ return true;
+ }
+ return this->INHERITED::onQuery(evt);
+ }
+
+ void drawBG(SkCanvas* canvas)
+ {
+ canvas->drawColor(0xFFDDDDDD);
+// canvas->drawColor(SK_ColorWHITE);
+ }
+
+ virtual void onDraw(SkCanvas* canvas)
+ {
+ this->drawBG(canvas);
+
+ SkScalar x = 0;
+ SkScalar y = 0;
+ for (int i = 0; i < N; i++)
+ {
+ canvas->drawBitmap(fBitmaps[i], x, y);
+ x += SkIntToScalar(fBitmaps[i].width());
+ }
+ this->inval(NULL);
+ }
+
+ virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y)
+ {
+ this->inval(NULL);
+ return this->INHERITED::onFindClickHandler(x, y);
+ }
+
+ virtual bool onClick(Click* click)
+ {
+ return this->INHERITED::onClick(click);
+ }
+
+private:
+ typedef SkView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new FontCacheView; }
+static SkViewRegister reg(MyFactory);
+