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 "TestClassDef.h" 10#include "SkMipMap.h" 11#include "SkBitmap.h" 12#include "SkRandom.h" 13 14static void make_bitmap(SkBitmap* bm, SkRandom& rand) { 15 // for now, Build needs a min size of 2, otherwise it will return NULL. 16 // should fix that to support 1 X N, where N > 1 to return non-null. 17 int w = 2 + rand.nextU() % 1000; 18 int h = 2 + rand.nextU() % 1000; 19 bm->setConfig(SkBitmap::kARGB_8888_Config, w, h); 20 bm->allocPixels(); 21 bm->eraseColor(SK_ColorWHITE); 22} 23 24DEF_TEST(MipMap, reporter) { 25 SkBitmap bm; 26 SkRandom rand; 27 28 for (int i = 0; i < 500; ++i) { 29 make_bitmap(&bm, rand); 30 SkAutoTUnref<SkMipMap> mm(SkMipMap::Build(bm)); 31 32 REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1, NULL)); 33 REPORTER_ASSERT(reporter, !mm->extractLevel(SK_Scalar1 * 2, NULL)); 34 35 SkMipMap::Level prevLevel; 36 sk_bzero(&prevLevel, sizeof(prevLevel)); 37 38 SkScalar scale = SK_Scalar1; 39 for (int j = 0; j < 30; ++j) { 40 scale = scale * 2 / 3; 41 42 SkMipMap::Level level; 43 if (mm->extractLevel(scale, &level)) { 44 REPORTER_ASSERT(reporter, level.fPixels); 45 REPORTER_ASSERT(reporter, level.fWidth > 0); 46 REPORTER_ASSERT(reporter, level.fHeight > 0); 47 REPORTER_ASSERT(reporter, level.fRowBytes >= level.fWidth * 4); 48 49 if (prevLevel.fPixels) { 50 REPORTER_ASSERT(reporter, level.fWidth <= prevLevel.fWidth); 51 REPORTER_ASSERT(reporter, level.fHeight <= prevLevel.fHeight); 52 } 53 prevLevel = level; 54 } 55 } 56 } 57} 58