1 /*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "tests/Test.h"
9
10 #include "include/core/SkBitmap.h"
11 #include "include/core/SkImage.h"
12
13 // https://bug.skia.org/5096
14 // Test that when we make an image from a subset of a bitmap, that it
15 // has a diff (ID, dimensions) from an image made from the entire
16 // bitmap or a different subset of the image.
DEF_TEST(ImageBitmapIdentity,r)17 DEF_TEST(ImageBitmapIdentity, r) {
18 SkBitmap bm, a, b;
19 bm.allocN32Pixels(32, 64);
20 bm.eraseColor(SK_ColorBLACK);
21 bm.setImmutable();
22 (void)bm.extractSubset(&a, SkIRect::MakeXYWH(0, 0, 32, 32));
23 (void)bm.extractSubset(&b, SkIRect::MakeXYWH(0, 32, 32, 32));
24 REPORTER_ASSERT(r, a.getGenerationID() == b.getGenerationID());
25 auto img = bm.asImage();
26 auto imgA = a.asImage();
27 auto imgB = b.asImage();
28 REPORTER_ASSERT(r, img->uniqueID() == bm.getGenerationID());
29 REPORTER_ASSERT(r, img->uniqueID() != imgA->uniqueID());
30 REPORTER_ASSERT(r, img->uniqueID() != imgB->uniqueID());
31 REPORTER_ASSERT(r, imgA->uniqueID() != imgB->uniqueID());
32 REPORTER_ASSERT(r, imgA->uniqueID() != a.getGenerationID());
33 REPORTER_ASSERT(r, imgB->uniqueID() != b.getGenerationID());
34 }
35