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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 "SkBitmap.h"
#include "SkMipMap.h"
#include "SkRandom.h"
#include "Test.h"
static void make_bitmap(SkBitmap* bm, SkRandom& rand) {
// for now, Build needs a min size of 2, otherwise it will return nullptr.
// should fix that to support 1 X N, where N > 1 to return non-null.
int w = 2 + rand.nextU() % 1000;
int h = 2 + rand.nextU() % 1000;
bm->allocN32Pixels(w, h);
bm->eraseColor(SK_ColorWHITE);
}
DEF_TEST(MipMap, reporter) {
SkBitmap bm;
SkRandom rand;
for (int i = 0; i < 500; ++i) {
make_bitmap(&bm, rand);
SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(bm, nullptr));
REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1, nullptr));
REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1 * 2, nullptr));
SkMipMap::Level prevLevel;
sk_bzero(&prevLevel, sizeof(prevLevel));
SkScalar scale = SK_Scalar1;
for (int j = 0; j < 30; ++j) {
scale = scale * 2 / 3;
SkMipMap::Level level;
if (mm->extractLevel(scale, &level)) {
REPORTER_ASSERT(reporter, level.fPixmap.addr());
REPORTER_ASSERT(reporter, level.fPixmap.width() > 0);
REPORTER_ASSERT(reporter, level.fPixmap.height() > 0);
REPORTER_ASSERT(reporter, (int)level.fPixmap.rowBytes() >= level.fPixmap.width() * 4);
if (prevLevel.fPixmap.addr()) {
REPORTER_ASSERT(reporter, level.fPixmap.width() <= prevLevel.fPixmap.width());
REPORTER_ASSERT(reporter, level.fPixmap.height() <= prevLevel.fPixmap.height());
}
prevLevel = level;
}
}
}
}
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