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.
15typedef uint64_t checksum_result;
16
17// Fill in bitmap with test data.
18static void CreateTestBitmap(SkBitmap* bitmap, int width, int height,
19                             SkColor color, skiatest::Reporter* reporter) {
20    bitmap->allocN32Pixels(width, height, kOpaque_SkAlphaType);
21    bitmap->eraseColor(color);
22}
23
24DEF_TEST(BitmapHasher, reporter) {
25    // Test SkBitmapHasher
26    SkBitmap bitmap;
27    uint64_t digest;
28    // initial test case
29    CreateTestBitmap(&bitmap, 333, 555, SK_ColorBLUE, reporter);
30    REPORTER_ASSERT(reporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
31    REPORTER_ASSERT(reporter, digest == 0xfb2903562766ef87ULL);
32    // same pixel data but different dimensions should yield a different checksum
33    CreateTestBitmap(&bitmap, 555, 333, SK_ColorBLUE, reporter);
34    REPORTER_ASSERT(reporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
35    REPORTER_ASSERT(reporter, digest == 0xfe04023fb97d0f61ULL);
36    // same dimensions but different color should yield a different checksum
37    CreateTestBitmap(&bitmap, 555, 333, SK_ColorGREEN, reporter);
38    REPORTER_ASSERT(reporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
39    REPORTER_ASSERT(reporter, digest == 0x2423c51cad6d1edcULL);
40}
41