grab from latest android

git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 171 insertions, 0 deletions

diff --git a/samplecode/SampleFontCache.cpp b/samplecode/SampleFontCache.cpp
new file mode 100644
index 0000000000..fb63f7146c
--- /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);
+