1 files changed, 110 insertions, 0 deletions
diff --git a/experimental/Intersection/ShapeOpsDemo.cpp b/experimental/Intersection/ShapeOpsDemo.cpp
new file mode 100644
index 0000000000..a2690ea42a
--- /dev/null
+++ b/experimental/Intersection/ShapeOpsDemo.cpp
@@ -0,0 +1,110 @@
+#include "EdgeWalker_Test.h"
+#include "ShapeOps.h"
+#include "SkApplication.h"
+#include "SkCanvas.h"
+#include "SkEvent.h"
+#include "SkGraphics.h"
+#include "SkPaint.h"
+
+SkCanvas* canvas = 0;
+SkBitmap* bitmap;
+
+static bool test15(SkCanvas* canvas) {
+    // Three circles bounce inside a rectangle. The circles describe three, four
+    // or five points which in turn describe a polygon. The polygon points
+    // bounce inside the circles. The circles rotate and scale over time. The
+    // polygons are combined into a single path, simplified, and stroked.
+    static int step = 0;
+    const int circles = 3;
+    int scales[circles];
+    int angles[circles];
+    int locs[circles * 2];
+    int pts[circles * 2 * 4];
+    int c, p;
+    for (c = 0; c < circles; ++c) {
+        scales[c] = abs(10 - (step + c * 4) % 21);
+        angles[c] = (step + c * 6) % 600;
+        locs[c * 2] = abs(130 - (step + c * 9) % 261);
+        locs[c * 2 + 1] = abs(170 - (step + c * 11) % 341);
+        for (p = 0; p < 4; ++p) {
+            pts[c * 8 + p * 2] = abs(90 - ((step + c * 121 + p * 13) % 190));
+            pts[c * 8 + p * 2 + 1] = abs(110 - ((step + c * 223 + p * 17) % 230));
+        }
+    }
+    SkPath path, out;
+    for (c = 0; c < circles; ++c) {
+        for (p = 0; p < 4; ++p) {
+            SkScalar x = pts[c * 8 + p * 2];
+            SkScalar y = pts[c * 8 + p * 2 + 1];
+            x *= 3 + scales[c] / 10.0f;
+            y *= 3 + scales[c] / 10.0f;
+            SkScalar angle = angles[c] * 3.1415f * 2 / 600;
+            SkScalar temp = x * cos(angle) - y * sin(angle);
+            y = x * sin(angle) + y * cos(angle);
+            x = temp;
+            x += locs[c * 2] * 200 / 130.0f;
+            y += locs[c * 2 + 1] * 200 / 170.0f;
+            x += 50;
+    //        y += 200;
+            if (p == 0) {
+                path.moveTo(x, y);
+            } else {
+                path.lineTo(x, y);
+            }
+        }
+        path.close();
+    }
+    showPath(path, "original:");
+    simplify(path, true, out);
+    showPath(out, "simplified:");
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    paint.setStyle(SkPaint::kStroke_Style);
+    paint.setStrokeWidth(3);
+    paint.setColor(0x3F007fbF);
+    canvas->drawPath(path, paint);
+    paint.setColor(0xFF60FF00);
+    paint.setStrokeWidth(1);
+    canvas->drawPath(out, paint);
+    ++step;
+    return true;
+}
+
+static bool (*tests[])(SkCanvas* ) = {
+    test15,
+};
+
+static size_t testsCount = sizeof(tests) / sizeof(tests[0]);
+
+static bool (*firstTest)(SkCanvas*) = test15;
+
+extern "C" void* getPixels(bool* animate);
+extern "C" void unlockPixels();
+
+extern "C" void* getPixels(bool* animate) {
+	if (!canvas) {
+		canvas = new SkCanvas();
+		bitmap = new SkBitmap();
+		SkBitmap::Config config = SkBitmap::kARGB_8888_Config;
+		
+		bitmap->setConfig(config, 1100, 630);
+		bitmap->allocPixels();
+        bitmap->setIsOpaque(true);
+		canvas->setBitmapDevice(*bitmap);
+	}
+	canvas->drawColor(SK_ColorWHITE);
+    size_t index = 0;
+    if (index == 0 && firstTest) {
+        while (index < testsCount && tests[index] != firstTest) {
+            ++index;
+        }
+    }
+	*animate = (tests[index])(canvas);
+	bitmap->lockPixels();
+	return bitmap->getPixels();
+}
+
+extern "C" void unlockPixels() {
+	bitmap->unlockPixels();
+}
+