Adding my Bitmap2Path sample for 1on1 meeting.

samplecode/SamplePathUtils.cpp

+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SampleCode.h"
+#include "SkCanvas.h"
+#include "SkPathUtils.h"
+#include "SkView.h"
+//#include "SkPathOps.h" // loads fine here, won't in PathUtils src files
+
+class samplePathUtils : public SampleView {
+public:
+    samplePathUtils() {
+        bmp_paint.setAntiAlias(true);  // Black paint for bitmap
+        bmp_paint.setStyle(SkPaint::kFill_Style);
+        bmp_paint.setColor(SK_ColorBLACK);
+        
+        bg_paint.setAntiAlias(true);  // Cyan rectangle for bitmap bg
+        bg_paint.setStyle(SkPaint::kFill_Style);
+        bg_paint.setColor(SK_ColorCYAN);
+
+        bg_rect.addRect(SkRect::MakeXYWH(0, 0, w, h),
+                        SkPath::kCW_Direction);
+    }
+
+protected:
+    static const int numModes = 3;
+    
+    static const int h=16, w=16, stride=2, scale=5; // stride is in bytes (or chars)
+    static const int numChars = h * stride; // number of chars in entire array
+    char bits[ numChars ];
+
+    SkPaint bmp_paint, bg_paint;
+    SkPath bg_rect;
+    
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "PathUtils");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    /////////////////////////////////////////////////////////////
+    
+    virtual void onDrawContent(SkCanvas* canvas) {
+        static const char* bin_bmp = (char*) bits;
+        SkPathUtils::fillRandomBits( numChars, bits ); // generate random bitmap
+        
+        // loop through array of funtion pointers for modes of SkPath generation 
+        const line2path l2p_fns[numModes] = {SkPathUtils::line2path_pixel,
+                                             SkPathUtils::line2path_pixelCircle,
+                                             SkPathUtils::line2path_span};
+
+        for (int i = 0; i < numModes; ++i) {
+            SkPath path; // generate and simplify each path
+            SkPathUtils::bitmap2path(&path, bin_bmp, l2p_fns[i], h, w, stride);
+
+            canvas->save(); // DRAWING
+            canvas->scale(scale, scale);  // scales up each bitmap
+            canvas->translate(1.5f * i * w, 0); // translates past previous bitmap
+            canvas->drawPath(bg_rect, bg_paint); // draws background rectangle
+            canvas->drawPath(path, bmp_paint); // draw bitmap
+            canvas->restore();
+        }
+
+        // use the SkRegion method
+        SkPath pathR;
+        SkPathUtils::bitmap2path_region(&pathR, bin_bmp, h, w, stride);
+
+        canvas->save();
+        canvas->scale(scale, scale);  // scales up each bitmap
+        canvas->translate(1.5f * numModes * w, 0); // translates past previous bitmap
+        canvas->drawPath(bg_rect, bg_paint); // draws background rectangle
+        canvas->drawPath(pathR, bmp_paint); // draw bitmap
+        canvas->restore();
+    }
+    
+private:
+    typedef SkView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new samplePathUtils; }
+static SkViewRegister reg(MyFactory)
+;