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.
17DEF_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