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, 115 insertions, 0 deletions

diff --git a/samplecode/SampleMeasure.cpp b/samplecode/SampleMeasure.cpp
new file mode 100644
index 0000000..8078e03
--- /dev/null
+++ b/samplecode/SampleMeasure.cpp
@@ -0,0 +1,115 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+#include "SkPath.h"
+#include "SkRegion.h"
+#include "SkShader.h"
+#include "SkUtils.h"
+#include "Sk1DPathEffect.h"
+#include "SkCornerPathEffect.h"
+#include "SkPathMeasure.h"
+#include "SkRandom.h"
+#include "SkColorPriv.h"
+#include "SkColorFilter.h"
+#include "SkDither.h"
+
+// exercise scale/linear/devkern
+struct Setting {
+    SkScalar    fScale;
+    bool        fLinearText;
+    bool        fDevKernText;
+};
+
+static const SkScalar ONE = SkIntToScalar(9999)/10000;
+
+static const Setting gSettings[] = {
+    { 0,            false,  false   },
+    { 0,            false,  true    },
+    { 0,            true,   false   },
+    { 0,            true,   true    },
+    { ONE,   false,  false   },
+    { ONE,   false,  true    },
+    { ONE,   true,   false   },
+    { ONE,   true,   true    }
+};
+
+static void doMeasure(SkCanvas* canvas, const SkPaint& paint, const char text[]) {
+    SkScalar    dy = paint.getFontMetrics(NULL);
+
+    size_t      len = strlen(text);
+    SkAutoTMalloc<SkScalar> autoWidths(len);
+    SkScalar*   widths = autoWidths.get();
+    SkAutoTMalloc<SkRect> autoRects(len);
+    SkRect*     rects = autoRects.get();
+    SkRect      bounds;
+
+    SkPaint p(paint);
+    for (size_t i = 0; i < SK_ARRAY_COUNT(gSettings); i++) {
+        p.setLinearText(gSettings[i].fLinearText);
+        p.setDevKernText(gSettings[i].fDevKernText);
+        SkScalar scale = gSettings[i].fScale;
+        
+        int n = p.getTextWidths(text, len, widths, rects);
+        SkScalar w = p.measureText(text, len, &bounds, scale);
+        
+        p.setStyle(SkPaint::kFill_Style);
+        p.setColor(0x8888FF88);
+        canvas->drawRect(bounds, p);
+        p.setColor(0xFF000000);
+        canvas->drawText(text, len, 0, 0, p);
+
+        p.setStyle(SkPaint::kStroke_Style);
+        p.setStrokeWidth(0);
+        p.setColor(0xFFFF0000);
+        SkScalar x = 0;
+        for (int j = 0; j < n; j++) {
+            SkRect r = rects[j];
+            r.offset(x, 0);
+            canvas->drawRect(r, p);
+            x += widths[j];
+        }
+
+        p.setColor(0xFF0000FF);
+        canvas->drawLine(0, 0, w, 0, p);
+        p.setStrokeWidth(SkIntToScalar(4));
+        canvas->drawPoint(x, 0, p);
+        
+        canvas->translate(0, dy);
+    }
+}
+
+class MeasureView : public SampleView {
+public:
+    SkPaint fPaint;
+
+	MeasureView() {
+        fPaint.setAntiAlias(true);
+        fPaint.setTextSize(SkIntToScalar(64));
+        this->setBGColor(0xFFDDDDDD);
+    }
+
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "Measure");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+    
+    virtual void onDrawContent(SkCanvas* canvas) {
+        canvas->translate(fPaint.getTextSize(), fPaint.getTextSize());
+        doMeasure(canvas, fPaint, "Hamburgefons");
+    }
+    
+private:
+    typedef SampleView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new MeasureView; }
+static SkViewRegister reg(MyFactory);
+