| /* |
| * 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 "Test.h" |
| #include "TestClassDef.h" |
| #include "SkMipMap.h" |
| #include "SkBitmap.h" |
| #include "SkRandom.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->setConfig(SkBitmap::kARGB_8888_Config, w, h); |
| bm->allocPixels(); |
| 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; |
| } |
| } |
| } |
| } |