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 "Test.h" 9 #include "SkMipMap.h" 10 #include "SkBitmap.h" 11 #include "SkRandom.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->setConfig(SkBitmap::kARGB_8888_Config, w, h); 19 bm->allocPixels(); 20 bm->eraseColor(SK_ColorWHITE); 21 } 22 23 static void TestMipMap(skiatest::Reporter* reporter) { 24 SkBitmap bm; 25 SkRandom rand; 26 27 for (int i = 0; i < 500; ++i) { 28 make_bitmap(&bm, rand); 29 SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(bm)); 30 31 REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1, NULL)); 32 REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1 * 2, NULL)); 33 34 SkMipMap::Level prevLevel; 35 sk_bzero(&prevLevel, sizeof(prevLevel)); 36 37 SkScalar scale = SK_Scalar1; 38 for (int j = 0; j < 30; ++j) { 39 scale = scale * 2 / 3; 40 41 SkMipMap::Level level; 42 if (mm->extractLevel(scale, &level)) { 43 REPORTER_ASSERT(reporter, level.fPixels); 44 REPORTER_ASSERT(reporter, level.fWidth > 0); 45 REPORTER_ASSERT(reporter, level.fHeight > 0); 46 REPORTER_ASSERT(reporter, level.fRowBytes >= level.fWidth * 4); 47 48 if (prevLevel.fPixels) { 49 REPORTER_ASSERT(reporter, level.fWidth <= prevLevel.fWidth); 50 REPORTER_ASSERT(reporter, level.fHeight <= prevLevel.fHeight); 51 } 52 prevLevel = level; 53 } 54 } 55 } 56 } 57 58 #include "TestClassDef.h" 59 DEFINE_TESTCLASS("MipMap", MipMapTestClass, TestMipMap) 60
