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halcanary8d3ad5a2016-03-24 09:18:14 -07001/*
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 "Test.h"
9
10#include "SkBitmap.h"
11#include "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 = SkImage::MakeFromBitmap(bm);
26 auto imgA = SkImage::MakeFromBitmap(a);
27 auto imgB = SkImage::MakeFromBitmap(b);
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}