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- /*
- * 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 "include/core/SkBitmap.h"
- #include "include/utils/SkRandom.h"
- #include "src/core/SkMipMap.h"
- #include "tests/Test.h"
- static void make_bitmap(SkBitmap* bm, int width, int height) {
- bm->allocN32Pixels(width, height);
- bm->eraseColor(SK_ColorWHITE);
- }
- DEF_TEST(MipMap, reporter) {
- SkBitmap bm;
- SkRandom rand;
- for (int i = 0; i < 500; ++i) {
- int width = 1 + rand.nextU() % 1000;
- int height = 1 + rand.nextU() % 1000;
- make_bitmap(&bm, width, height);
- sk_sp<SkMipMap> mm(SkMipMap::Build(bm, nullptr));
- REPORTER_ASSERT(reporter, mm->countLevels() == SkMipMap::ComputeLevelCount(width, height));
- REPORTER_ASSERT(reporter, !mm->extractLevel(SkSize::Make(SK_Scalar1, SK_Scalar1),
- nullptr));
- REPORTER_ASSERT(reporter, !mm->extractLevel(SkSize::Make(SK_Scalar1 * 2, SK_Scalar1 * 2),
- nullptr));
- 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(SkSize::Make(scale, scale), &level)) {
- REPORTER_ASSERT(reporter, level.fPixmap.addr());
- REPORTER_ASSERT(reporter, level.fPixmap.width() > 0);
- REPORTER_ASSERT(reporter, level.fPixmap.height() > 0);
- REPORTER_ASSERT(reporter, (int)level.fPixmap.rowBytes() >= level.fPixmap.width() * 4);
- if (prevLevel.fPixmap.addr()) {
- REPORTER_ASSERT(reporter, level.fPixmap.width() <= prevLevel.fPixmap.width());
- REPORTER_ASSERT(reporter, level.fPixmap.height() <= prevLevel.fPixmap.height());
- }
- prevLevel = level;
- }
- }
- }
- }
- static void test_mipmap_generation(int width, int height, int expectedMipLevelCount,
- skiatest::Reporter* reporter) {
- SkBitmap bm;
- bm.allocN32Pixels(width, height);
- bm.eraseColor(SK_ColorWHITE);
- sk_sp<SkMipMap> mm(SkMipMap::Build(bm, nullptr));
- const int mipLevelCount = mm->countLevels();
- REPORTER_ASSERT(reporter, mipLevelCount == expectedMipLevelCount);
- REPORTER_ASSERT(reporter, mipLevelCount == SkMipMap::ComputeLevelCount(width, height));
- for (int i = 0; i < mipLevelCount; ++i) {
- SkMipMap::Level level;
- REPORTER_ASSERT(reporter, mm->getLevel(i, &level));
- // Make sure the mipmaps contain valid data and that the sizes are correct
- REPORTER_ASSERT(reporter, level.fPixmap.addr());
- SkISize size = SkMipMap::ComputeLevelSize(width, height, i);
- REPORTER_ASSERT(reporter, level.fPixmap.width() == size.width());
- REPORTER_ASSERT(reporter, level.fPixmap.height() == size.height());
- // + 1 because SkMipMap does not include the base mipmap level.
- int twoToTheMipLevel = 1 << (i + 1);
- int currentWidth = width / twoToTheMipLevel;
- int currentHeight = height / twoToTheMipLevel;
- REPORTER_ASSERT(reporter, level.fPixmap.width() == currentWidth);
- REPORTER_ASSERT(reporter, level.fPixmap.height() == currentHeight);
- }
- }
- DEF_TEST(MipMap_DirectLevelAccess, reporter) {
- // create mipmap with invalid size
- {
- // SkMipMap current requires the dimensions be greater than 2x2
- SkBitmap bm;
- bm.allocN32Pixels(1, 1);
- bm.eraseColor(SK_ColorWHITE);
- sk_sp<SkMipMap> mm(SkMipMap::Build(bm, nullptr));
- REPORTER_ASSERT(reporter, mm == nullptr);
- }
- // check small mipmap's count and levels
- // There should be 5 mipmap levels generated:
- // 16x16, 8x8, 4x4, 2x2, 1x1
- test_mipmap_generation(32, 32, 5, reporter);
- // check large mipmap's count and levels
- // There should be 9 mipmap levels generated:
- // 500x500, 250x250, 125x125, 62x62, 31x31, 15x15, 7x7, 3x3, 1x1
- test_mipmap_generation(1000, 1000, 9, reporter);
- }
- struct LevelCountScenario {
- int fWidth;
- int fHeight;
- int fExpectedLevelCount;
- };
- DEF_TEST(MipMap_ComputeLevelCount, reporter) {
- const LevelCountScenario tests[] = {
- // Test mipmaps with negative sizes
- {-100, 100, 0},
- {100, -100, 0},
- {-100, -100, 0},
- // Test mipmaps with 0, 1, 2 as dimensions
- // (SkMipMap::Build requires a min size of 1)
- //
- // 0
- {0, 100, 0},
- {100, 0, 0},
- {0, 0, 0},
- // 1
- {1, 100, 6},
- {100, 1, 6},
- {1, 1, 0},
- // 2
- {2, 100, 6},
- {100, 2, 6},
- {2, 2, 1},
- // Test a handful of boundaries such as 63x63 and 64x64
- {63, 63, 5},
- {64, 64, 6},
- {127, 127, 6},
- {128, 128, 7},
- {255, 255, 7},
- {256, 256, 8},
- // Test different dimensions, such as 256x64
- {64, 129, 7},
- {255, 32, 7},
- {500, 1000, 9}
- };
- for (auto& currentTest : tests) {
- int levelCount = SkMipMap::ComputeLevelCount(currentTest.fWidth, currentTest.fHeight);
- REPORTER_ASSERT(reporter, currentTest.fExpectedLevelCount == levelCount);
- }
- }
- struct LevelSizeScenario {
- int fBaseWidth;
- int fBaseHeight;
- int fLevel;
- SkISize fExpectedMipMapLevelSize;
- };
- DEF_TEST(MipMap_ComputeLevelSize, reporter) {
- const LevelSizeScenario tests[] = {
- // Test mipmaps with negative sizes
- {-100, 100, 0, SkISize::Make(0, 0)},
- {100, -100, 0, SkISize::Make(0, 0)},
- {-100, -100, 0, SkISize::Make(0, 0)},
- // Test mipmaps with 0, 1, 2 as dimensions
- // (SkMipMap::Build requires a min size of 1)
- //
- // 0
- {0, 100, 0, SkISize::Make(0, 0)},
- {100, 0, 0, SkISize::Make(0, 0)},
- {0, 0, 0, SkISize::Make(0, 0)},
- // 1
- {1, 100, 0, SkISize::Make(1, 50)},
- {100, 1, 0, SkISize::Make(50, 1)},
- {1, 1, 0, SkISize::Make(0, 0)},
- // 2
- {2, 100, 0, SkISize::Make(1, 50)},
- {100, 2, 1, SkISize::Make(25, 1)},
- {2, 2, 0, SkISize::Make(1, 1)},
- // Test a handful of cases
- {63, 63, 2, SkISize::Make(7, 7)},
- {64, 64, 2, SkISize::Make(8, 8)},
- {127, 127, 2, SkISize::Make(15, 15)},
- {64, 129, 3, SkISize::Make(4, 8)},
- {255, 32, 6, SkISize::Make(1, 1)},
- {500, 1000, 1, SkISize::Make(125, 250)},
- };
- for (auto& currentTest : tests) {
- SkISize levelSize = SkMipMap::ComputeLevelSize(currentTest.fBaseWidth,
- currentTest.fBaseHeight,
- currentTest.fLevel);
- REPORTER_ASSERT(reporter, currentTest.fExpectedMipMapLevelSize == levelSize);
- }
- }
- DEF_TEST(MipMap_F16, reporter) {
- SkBitmap bmp;
- bmp.allocPixels(SkImageInfo::Make(10, 10, kRGBA_F16_SkColorType, kPremul_SkAlphaType));
- bmp.eraseColor(0);
- sk_sp<SkMipMap> mipmap(SkMipMap::Build(bmp, nullptr));
- }
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