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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmapHasher.h"
#include "SkBitmap.h"
#include "SkColor.h"
#include "Test.h"
// Word size that is large enough to hold results of any checksum type.
typedef uint64_t checksum_result;
// Fill in bitmap with test data.
static void CreateTestBitmap(SkBitmap &bitmap, SkBitmap::Config config, int width, int height,
SkColor color, skiatest::Reporter* reporter) {
bitmap.setConfig(config, width, height);
REPORTER_ASSERT(reporter, bitmap.allocPixels());
bitmap.setAlphaType(kOpaque_SkAlphaType);
bitmap.eraseColor(color);
}
DEF_TEST(BitmapHasher, reporter) {
// Test SkBitmapHasher
SkBitmap bitmap;
uint64_t digest;
// initial test case
CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 333, 555, SK_ColorBLUE, reporter);
REPORTER_ASSERT(reporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
REPORTER_ASSERT(reporter, digest == 0xfb2903562766ef87ULL);
// same pixel data but different dimensions should yield a different checksum
CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 555, 333, SK_ColorBLUE, reporter);
REPORTER_ASSERT(reporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
REPORTER_ASSERT(reporter, digest == 0xfe04023fb97d0f61ULL);
// same dimensions but different color should yield a different checksum
CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 555, 333, SK_ColorGREEN, reporter);
REPORTER_ASSERT(reporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
REPORTER_ASSERT(reporter, digest == 0x2423c51cad6d1edcULL);
}
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