skia2/tests/MipMapTest.cpp
mike@reedtribe.org deee496cd3 replace setConfig+allocPixels with single call
BUG=skia:

Review URL: https://codereview.chromium.org/162643002

git-svn-id: http://skia.googlecode.com/svn/trunk@13426 2bbb7eff-a529-9590-31e7-b0007b416f81
2014-02-13 14:41:43 +00:00

56 lines
1.7 KiB
C++

/*
* 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 NULL.
// 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));
REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1, NULL));
REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1 * 2, NULL));
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.fPixels);
REPORTER_ASSERT(reporter, level.fWidth > 0);
REPORTER_ASSERT(reporter, level.fHeight > 0);
REPORTER_ASSERT(reporter, level.fRowBytes >= level.fWidth * 4);
if (prevLevel.fPixels) {
REPORTER_ASSERT(reporter, level.fWidth <= prevLevel.fWidth);
REPORTER_ASSERT(reporter, level.fHeight <= prevLevel.fHeight);
}
prevLevel = level;
}
}
}
}