зеркало из https://github.com/mozilla/moz-skia.git
57 строки
1.8 KiB
C++
57 строки
1.8 KiB
C++
/*
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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 "SkBitmap.h"
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#include "SkMipMap.h"
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#include "SkRandom.h"
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#include "Test.h"
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static void make_bitmap(SkBitmap* bm, SkRandom& rand) {
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// for now, Build needs a min size of 2, otherwise it will return NULL.
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// should fix that to support 1 X N, where N > 1 to return non-null.
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int w = 2 + rand.nextU() % 1000;
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int h = 2 + rand.nextU() % 1000;
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bm->setConfig(SkBitmap::kARGB_8888_Config, w, h);
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bm->allocPixels();
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bm->eraseColor(SK_ColorWHITE);
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}
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DEF_TEST(MipMap, reporter) {
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SkBitmap bm;
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SkRandom rand;
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for (int i = 0; i < 500; ++i) {
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make_bitmap(&bm, rand);
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SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(bm));
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REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1, NULL));
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REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1 * 2, NULL));
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SkMipMap::Level prevLevel;
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sk_bzero(&prevLevel, sizeof(prevLevel));
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SkScalar scale = SK_Scalar1;
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for (int j = 0; j < 30; ++j) {
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scale = scale * 2 / 3;
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SkMipMap::Level level;
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if (mm->extractLevel(scale, &level)) {
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REPORTER_ASSERT(reporter, level.fPixels);
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REPORTER_ASSERT(reporter, level.fWidth > 0);
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REPORTER_ASSERT(reporter, level.fHeight > 0);
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REPORTER_ASSERT(reporter, level.fRowBytes >= level.fWidth * 4);
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if (prevLevel.fPixels) {
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REPORTER_ASSERT(reporter, level.fWidth <= prevLevel.fWidth);
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REPORTER_ASSERT(reporter, level.fHeight <= prevLevel.fHeight);
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}
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prevLevel = level;
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}
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}
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}
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}
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