Skia Merge (revision 1510)

This CL includes bug fixes and closely mirrors the version of
Skia used in Chrome M13, which is likely to be our baseline for
ICS.

The CL also adds source files for the SampleApp which will allow
us to execute basic skia tests. The SampleApp requires the
utils/views directory in order to run.

Finally, we have included the PDF backend for Skia in order to
experiment with using it to generate PDF files for certain
applications.

Note: The SampleApp and PDF code are not built as part of libskia.

Change-Id: I1895ccfbd8074e25f19148cc7bd1b4af571fb307

1 files changed, 167 insertions, 0 deletions

diff --git a/samplecode/SamplePageFlip.cpp b/samplecode/SamplePageFlip.cpp
new file mode 100644
index 0000000..7c5bf48
--- /dev/null
+++ b/samplecode/SamplePageFlip.cpp
@@ -0,0 +1,167 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGraphics.h"
+#include "SkRandom.h"
+#include "SkFlipPixelRef.h"
+#include "SkPageFlipper.h"
+
+#include <pthread.h>
+
+#define WIDTH   200
+#define HEIGHT  200
+
+static bool gDone;
+
+static void bounce(SkScalar* x, SkScalar* dx, const int max) {
+    *x += *dx;
+    if (*x < 0) {
+        *x = 0;
+        if (*dx < 0) {
+            *dx = -*dx;
+        }
+    } else if (*x > SkIntToScalar(max)) {
+        *x = SkIntToScalar(max);
+        if (*dx > 0) {
+            *dx = -*dx;
+        }
+    }
+}
+
+static void* draw_proc(void* context) {
+    const int OVALW = 32;
+    const int OVALH = 32;
+
+    const SkBitmap* bm = static_cast<const SkBitmap*>(context);
+    SkFlipPixelRef* ref = static_cast<SkFlipPixelRef*>(bm->pixelRef());
+
+    const int DSCALE = 1;
+    SkScalar    dx = SkIntToScalar(7) / DSCALE;
+    SkScalar    dy = SkIntToScalar(5) / DSCALE;
+    SkScalar    x = 0;
+    SkScalar    y = 0;
+
+    SkPaint paint;
+    
+    paint.setAntiAlias(true);
+    paint.setColor(SK_ColorRED);
+    
+    SkRect oval;
+    oval.setEmpty();
+
+    while (!gDone) {
+        ref->inval(oval, true);
+        oval.set(x, y, x + SkIntToScalar(OVALW), y + SkIntToScalar(OVALH));
+        ref->inval(oval, true);
+
+        SkAutoFlipUpdate    update(ref);
+        
+        if (!update.dirty().isEmpty()) {
+            // this must be local to the loop, since it needs to forget the pixels
+            // its writing to after each iteration, since we do the swap
+            SkCanvas    canvas(update.bitmap());
+
+//            SkDebugf("----- dirty [%d %d %d %d]\n", dirty.getBounds().fLeft, dirty.getBounds().fTop, dirty.getBounds().width(), dirty.getBounds().height());
+            canvas.clipRegion(update.dirty());
+            
+            canvas.drawColor(0, SkXfermode::kClear_Mode);            
+            canvas.drawOval(oval, paint);
+        }
+        bounce(&x, &dx, WIDTH-OVALW);
+        bounce(&y, &dy, HEIGHT-OVALH);
+        
+#if 1
+        for (int i = 0; i < 1000; i++) {
+            for (int j = 0; j < 10000; j++) {
+                SkFixedMul(j, 10);
+            }
+        }
+#endif
+    }
+    return NULL;
+}
+
+static const SkBitmap::Config gConfigs[] = {
+    SkBitmap::kARGB_8888_Config,
+#if 1
+    SkBitmap::kRGB_565_Config,
+    SkBitmap::kARGB_4444_Config,
+    SkBitmap::kA8_Config
+#endif
+};
+
+class PageFlipView : public SampleView {
+public:
+    
+    enum { N = SK_ARRAY_COUNT(gConfigs) };
+    
+    pthread_t   fThreads[N];
+    SkBitmap    fBitmaps[N];
+
+	PageFlipView() {
+        gDone = false;
+        for (int i = 0; i < N; i++) {
+            int             status;
+            pthread_attr_t  attr;
+            
+            status = pthread_attr_init(&attr);
+            SkASSERT(0 == status);
+
+            fBitmaps[i].setConfig(gConfigs[i], WIDTH, HEIGHT);
+            SkFlipPixelRef* pr = new SkFlipPixelRef(gConfigs[i], WIDTH, HEIGHT);
+            fBitmaps[i].setPixelRef(pr)->unref();
+            fBitmaps[i].eraseColor(0);
+
+            status = pthread_create(&fThreads[i], &attr,  draw_proc, &fBitmaps[i]);
+            SkASSERT(0 == status);
+        }
+        this->setBGColor(0xFFDDDDDD);
+    }
+    
+    virtual ~PageFlipView() {
+        gDone = true;
+        for (int i = 0; i < N; i++) {
+            void* ret;
+            int status = pthread_join(fThreads[i], &ret);
+            SkASSERT(0 == status);
+        }
+    }
+    
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "PageFlip");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    virtual void onDrawContent(SkCanvas* canvas) {
+        SkScalar x = SkIntToScalar(10);
+        SkScalar y = SkIntToScalar(10);
+        for (int i = 0; i < N; i++) {
+            canvas->drawBitmap(fBitmaps[i], x, y);
+            x += SkIntToScalar(fBitmaps[i].width() + 20);
+        }
+        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 SampleView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new PageFlipView; }
+static SkViewRegister reg(MyFactory);
+