Expose API for whether an SkPicture contains text

tests/PictureTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBlurImageFilter.h"
 #include "SkCanvas.h"
 #include "SkColorPriv.h"
@@ skipping 901 matching lines @@
             REPORTER_ASSERT(reporter, info4.fCTM.isIdentity());
             REPORTER_ASSERT(reporter, NULL == info4.fPaint);     // paint is/was uncopyable
             REPORTER_ASSERT(reporter, !info4.fIsNested && !info4.fHasNestedLayers);
     #endif
         }
     }
 }
 
 #endif
 
+static void test_has_text(skiatest::Reporter* reporter) {
+    SkPictureRecorder recorder;
+    SkPaint paint;
+    paint.setColor(SK_ColorBLUE);
+    SkPoint point = SkPoint::Make(10, 10);
+
+    SkCanvas* canvas = recorder.beginRecording(100, 100);
+    {
+        canvas->drawRect(SkRect::MakeWH(20, 20), paint);
+    }
+    SkAutoTUnref<SkPicture> picture(recorder.endRecording());
+    REPORTER_ASSERT(reporter, !picture->hasText());
+
+    canvas = recorder.beginRecording(100, 100);
+    {
+        canvas->drawText("Q", 1, point.fX, point.fY, paint);
+    }
+    picture.reset(recorder.endRecording());
+    REPORTER_ASSERT(reporter, picture->hasText());
+
+    canvas = recorder.beginRecording(100, 100);
+    {
+        canvas->drawPosText("Q", 1, &point, paint);
+    }
+    picture.reset(recorder.endRecording());
+    REPORTER_ASSERT(reporter, picture->hasText());
+
+    canvas = recorder.beginRecording(100, 100);
+    {
+        canvas->drawPosTextH("Q", 1, &point.fX, point.fY, paint);
+    }
+    picture.reset(recorder.endRecording());
+    REPORTER_ASSERT(reporter, picture->hasText());
+
+    canvas = recorder.beginRecording(100, 100);
+    {
+        SkPath path;
+        path.moveTo(0, 0);
+        path.lineTo(50, 50);
+
+        canvas->drawTextOnPathHV("Q", 1, path, point.fX, point.fY, paint);
+    }
+    picture.reset(recorder.endRecording());
+    REPORTER_ASSERT(reporter, picture->hasText());
+
+    canvas = recorder.beginRecording(100, 100);
+    {
+        SkPath path;
+        path.moveTo(0, 0);
+        path.lineTo(50, 50);
+
+        canvas->drawTextOnPath("Q", 1, path, NULL, paint);
+    }
+    picture.reset(recorder.endRecording());
+    REPORTER_ASSERT(reporter, picture->hasText());
+}
+
 static void set_canvas_to_save_count_4(SkCanvas* canvas) {
     canvas->restoreToCount(1);
     canvas->save();
     canvas->save();
     canvas->save();
 }
 
 /**
  * A canvas that records the number of saves, saveLayers and restores.
  */
@@ skipping 622 matching lines @@
     test_deleting_empty_picture();
     test_serializing_empty_picture();
 #else
     test_bad_bitmap();
 #endif
     test_unbalanced_save_restores(reporter);
     test_peephole();
 #if SK_SUPPORT_GPU
     test_gpu_veto(reporter);
 #endif
+    test_has_text(reporter);
     test_gatherpixelrefs(reporter);
     test_gatherpixelrefsandrects(reporter);
     test_bitmap_with_encoded_data(reporter);
     test_draw_empty(reporter);
     test_clip_bound_opt(reporter);
     test_clip_expansion(reporter);
     test_hierarchical(reporter);
     test_gen_id(reporter);
 }
 
@@ skipping 77 matching lines @@
     make_bm(&replayBM, 100, 100, SK_ColorBLACK, false);
     SkCanvas replayCanvas(replayBM);
     picture->draw(&replayCanvas);
     replayCanvas.flush();
 
     // With the bug present, at (55, 55) we would get a fully opaque red
     // intead of a dark red.
     REPORTER_ASSERT(reporter, replayBM.getColor(30, 30) == 0xff000080);
     REPORTER_ASSERT(reporter, replayBM.getColor(55, 55) == 0xff800000);
 }