Add GM that tests clipping annotations

gm/annotated_text.cpp

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkAnnotation.h"
+#include "SkData.h"
+#include "gm.h"
+
+static void draw_url_annotated_text_with_box(
+        SkCanvas* canvas, const void* text,
+        SkScalar x, SkScalar y, const SkPaint& paint, const char* url) {
+    size_t byteLength = strlen(static_cast<const char*>(text));
+    SkRect bounds;
+    (void)paint.measureText(text, byteLength, &bounds);
+    bounds.offset(x, y);
+    SkAutoTUnref<SkData> urlData(SkData::NewWithCString(url));
+    SkAnnotateRectWithURL(canvas, bounds, urlData);
+    SkPaint shade;
+    shade.setColor(0x80346180);
+    canvas->drawRect(bounds, shade);
+    canvas->drawText(text, byteLength, x, y, paint);
+}
+
+DEF_SIMPLE_GM(annotated_text, canvas, 512, 512) {
+    SkAutoCanvasRestore autoCanvasRestore(canvas, true);
+    canvas->clear(SK_ColorWHITE);
+    canvas->clipRect(SkRect::MakeXYWH(64, 64, 384, 384));
+    canvas->clear(0xFFEEEEEE);
+    SkPaint p;
+    p.setTextSize(40);
+    const char text[] = "Click this link!";
+    const char url[] = "https://www.google.com/";
+    draw_url_annotated_text_with_box(canvas, text, 200.0f, 80.0f, p, url);
+    SkAutoCanvasRestore autoCanvasRestore2(canvas, true);
+    canvas->rotate(90);
+    draw_url_annotated_text_with_box(canvas, text, 150.0f, -55.0f, p, url);
+}