908f583662
some algorithm other than CityHash Review URL: https://codereview.chromium.org/14170010 git-svn-id: http://skia.googlecode.com/svn/trunk@8639 2bbb7eff-a529-9590-31e7-b0007b416f81
65 lines
2.6 KiB
C++
65 lines
2.6 KiB
C++
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/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Test.h"
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#include "SkBitmap.h"
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#include "SkBitmapHasher.h"
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#include "SkColor.h"
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// Word size that is large enough to hold results of any checksum type.
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typedef uint64_t checksum_result;
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namespace skiatest {
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class BitmapHasherTestClass : public Test {
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public:
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static Test* Factory(void*) {return SkNEW(BitmapHasherTestClass); }
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protected:
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virtual void onGetName(SkString* name) { name->set("BitmapHasher"); }
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virtual void onRun(Reporter* reporter) {
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this->fReporter = reporter;
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RunTest();
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}
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private:
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// Fill in bitmap with test data.
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void CreateTestBitmap(SkBitmap &bitmap, SkBitmap::Config config, int width, int height,
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SkColor color) {
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bitmap.setConfig(config, width, height);
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REPORTER_ASSERT(fReporter, bitmap.allocPixels());
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bitmap.setIsOpaque(true);
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bitmap.eraseColor(color);
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}
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void RunTest() {
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// Test SkBitmapHasher
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SkBitmap bitmap;
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SkHashDigest digest;
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// initial test case
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CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 333, 555, SK_ColorBLUE);
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REPORTER_ASSERT(fReporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
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REPORTER_ASSERT(fReporter, digest == 0x18f9df68b1b02f38ULL);
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// same pixel data but different dimensions should yield a different checksum
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CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 555, 333, SK_ColorBLUE);
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REPORTER_ASSERT(fReporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
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REPORTER_ASSERT(fReporter, digest == 0x6b0298183f786c8eULL);
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// same dimensions but different color should yield a different checksum
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CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 555, 333, SK_ColorGREEN);
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REPORTER_ASSERT(fReporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
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REPORTER_ASSERT(fReporter, digest == 0xc6b4b3f6fadaaf37ULL);
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// same pixel colors in a different config should yield the same checksum
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CreateTestBitmap(bitmap, SkBitmap::kARGB_4444_Config, 555, 333, SK_ColorGREEN);
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REPORTER_ASSERT(fReporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));
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REPORTER_ASSERT(fReporter, digest == 0xc6b4b3f6fadaaf37ULL);
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}
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Reporter* fReporter;
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};
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static TestRegistry gReg(BitmapHasherTestClass::Factory);
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}
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