1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkBitmap.h" 9 #include "SkMipMap.h" 10 #include "SkRandom.h" 11 #include "Test.h" 12 13 static void make_bitmap(SkBitmap* bm, SkRandom& rand) { 14 // for now, Build needs a min size of 2, otherwise it will return NULL. 15 // should fix that to support 1 X N, where N > 1 to return non-null. 16 int w = 2 + rand.nextU() % 1000; 17 int h = 2 + rand.nextU() % 1000; 18 bm->allocN32Pixels(w, h); 19 bm->eraseColor(SK_ColorWHITE); 20 } 21 22 DEF_TEST(MipMap, reporter) { 23 SkBitmap bm; 24 SkRandom rand; 25 26 for (int i = 0; i < 500; ++i) { 27 make_bitmap(&bm, rand); 28 SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(bm)); 29 30 REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1, NULL)); 31 REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1 * 2, NULL)); 32 33 SkMipMap::Level prevLevel; 34 sk_bzero(&prevLevel, sizeof(prevLevel)); 35 36 SkScalar scale = SK_Scalar1; 37 for (int j = 0; j < 30; ++j) { 38 scale = scale * 2 / 3; 39 40 SkMipMap::Level level; 41 if (mm->extractLevel(scale, &level)) { 42 REPORTER_ASSERT(reporter, level.fPixels); 43 REPORTER_ASSERT(reporter, level.fWidth > 0); 44 REPORTER_ASSERT(reporter, level.fHeight > 0); 45 REPORTER_ASSERT(reporter, level.fRowBytes >= level.fWidth * 4); 46 47 if (prevLevel.fPixels) { 48 REPORTER_ASSERT(reporter, level.fWidth <= prevLevel.fWidth); 49 REPORTER_ASSERT(reporter, level.fHeight <= prevLevel.fHeight); 50 } 51 prevLevel = level; 52 } 53 } 54 } 55 } 56
