1 /*
2 * Copyright 2013 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 "SkBitmapHasher.h"
9
10 #include "SkBitmap.h"
11 #include "SkColor.h"
12 #include "Test.h"
13
14 // Word size that is large enough to hold results of any checksum type.
15 typedef uint64_t checksum_result;
16
17 // Fill in bitmap with test data.
CreateTestBitmap(SkBitmap * bitmap,int width,int height,SkColor color,skiatest::Reporter * reporter)18 static void CreateTestBitmap(SkBitmap* bitmap, int width, int height,
19 SkColor color, skiatest::Reporter* reporter) {
20 SkImageInfo info = SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType);
21 REPORTER_ASSERT(reporter, bitmap->allocPixels(info));
22 bitmap->eraseColor(color);
23 }
24
DEF_TEST(BitmapHasher,reporter)25 DEF_TEST(BitmapHasher, reporter) {
26 // Test SkBitmapHasher
27 SkBitmap bitmap;
28 uint64_t digest;
29 // initial test case
30 CreateTestBitmap(&bitmap, 333, 555, SK_ColorBLUE, reporter);
31 REPORTER_ASSERT(reporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
32 REPORTER_ASSERT(reporter, digest == 0xfb2903562766ef87ULL);
33 // same pixel data but different dimensions should yield a different checksum
34 CreateTestBitmap(&bitmap, 555, 333, SK_ColorBLUE, reporter);
35 REPORTER_ASSERT(reporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
36 REPORTER_ASSERT(reporter, digest == 0xfe04023fb97d0f61ULL);
37 // same dimensions but different color should yield a different checksum
38 CreateTestBitmap(&bitmap, 555, 333, SK_ColorGREEN, reporter);
39 REPORTER_ASSERT(reporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
40 REPORTER_ASSERT(reporter, digest == 0x2423c51cad6d1edcULL);
41 }
42