commit-bot@chromium.org | 7585479 | 2013-10-29 19:55:00 +0000 | [diff] [blame^] | 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 "SkCanvas.h" |
| 10 | #include "SkData.h" |
| 11 | #include "SkForceLinking.h" |
| 12 | #include "SkImageDecoder.h" |
| 13 | #include "SkImagePriv.h" |
| 14 | #include "SkLazyPixelRef.h" |
| 15 | #include "SkScaledImageCache.h" |
| 16 | #include "SkStream.h" |
| 17 | #include "Test.h" |
| 18 | |
| 19 | __SK_FORCE_IMAGE_DECODER_LINKING; |
| 20 | |
| 21 | /** |
| 22 | * Fill this bitmap with some color. |
| 23 | */ |
| 24 | static void make_test_image(SkBitmap* bm) { |
| 25 | static const int W = 50, H = 50; |
| 26 | static const SkBitmap::Config config = SkBitmap::kARGB_8888_Config; |
| 27 | bm->setConfig(config, W, H); |
| 28 | bm->allocPixels(); |
| 29 | bm->eraseColor(SK_ColorBLACK); |
| 30 | SkCanvas canvas(*bm); |
| 31 | SkPaint paint; |
| 32 | paint.setColor(SK_ColorBLUE); |
| 33 | canvas.drawRectCoords(0, 0, SkIntToScalar(W/2), |
| 34 | SkIntToScalar(H/2), paint); |
| 35 | paint.setColor(SK_ColorWHITE); |
| 36 | canvas.drawRectCoords(SkIntToScalar(W/2), SkIntToScalar(H/2), |
| 37 | SkIntToScalar(W), SkIntToScalar(H), paint); |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * encode this bitmap into some data via SkImageEncoder |
| 42 | */ |
| 43 | static SkData* create_data_from_bitmap(const SkBitmap& bm, |
| 44 | SkImageEncoder::Type type) { |
| 45 | SkDynamicMemoryWStream stream; |
| 46 | if (SkImageEncoder::EncodeStream(&stream, bm, type, 100)) { |
| 47 | return stream.copyToData(); |
| 48 | } |
| 49 | return NULL; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * A simplified version of SkBitmapFactory |
| 54 | */ |
| 55 | static bool simple_bitmap_factory(SkBitmapFactory::DecodeProc proc, |
| 56 | SkData* data, |
| 57 | SkBitmap* dst) { |
| 58 | SkImage::Info info; |
| 59 | if (!proc(data->data(), data->size(), &info, NULL)) { |
| 60 | return false; |
| 61 | } |
| 62 | dst->setConfig(SkImageInfoToBitmapConfig(info), info.fWidth, |
| 63 | info.fHeight, 0, info.fAlphaType); |
| 64 | SkAutoTUnref<SkLazyPixelRef> ref(SkNEW_ARGS(SkLazyPixelRef, |
| 65 | (data, proc, NULL))); |
| 66 | dst->setPixelRef(ref); |
| 67 | return true; |
| 68 | } |
| 69 | |
| 70 | static void compare_bitmaps(skiatest::Reporter* reporter, |
| 71 | const SkBitmap& b1, const SkBitmap& b2, |
| 72 | bool pixelPerfect = true) { |
| 73 | REPORTER_ASSERT(reporter, b1.empty() == b2.empty()); |
| 74 | REPORTER_ASSERT(reporter, b1.width() == b2.width()); |
| 75 | REPORTER_ASSERT(reporter, b1.height() == b2.height()); |
| 76 | REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull()); |
| 77 | SkAutoLockPixels autoLockPixels1(b1); |
| 78 | SkAutoLockPixels autoLockPixels2(b2); |
| 79 | REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull()); |
| 80 | if (b1.isNull() || b1.empty()) { |
| 81 | return; |
| 82 | } |
| 83 | REPORTER_ASSERT(reporter, NULL != b1.getPixels()); |
| 84 | REPORTER_ASSERT(reporter, NULL != b2.getPixels()); |
| 85 | if ((!(b1.getPixels())) || (!(b2.getPixels()))) { |
| 86 | return; |
| 87 | } |
| 88 | if ((b1.width() != b2.width()) || |
| 89 | (b1.height() != b2.height())) { |
| 90 | return; |
| 91 | } |
| 92 | if (!pixelPerfect) { |
| 93 | return; |
| 94 | } |
| 95 | int pixelErrors = 0; |
| 96 | for (int y = 0; y < b2.height(); ++y) { |
| 97 | for (int x = 0; x < b2.width(); ++x) { |
| 98 | if (b1.getColor(x, y) != b2.getColor(x, y)) { |
| 99 | ++pixelErrors; |
| 100 | } |
| 101 | } |
| 102 | } |
| 103 | REPORTER_ASSERT(reporter, 0 == pixelErrors); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * This checks to see that a SkLazyPixelRef works as advertized. |
| 108 | */ |
| 109 | #include "TestClassDef.h" |
| 110 | DEF_TEST(CachedDecodingPixelRefTest, reporter) { |
| 111 | SkBitmap original; |
| 112 | make_test_image(&original); |
| 113 | const size_t bitmapSize = original.getSize(); |
| 114 | const size_t oldByteLimit = SkScaledImageCache::GetByteLimit(); |
| 115 | REPORTER_ASSERT(reporter, (!(original.empty())) && (!(original.isNull()))); |
| 116 | |
| 117 | static const SkImageEncoder::Type types[] = { |
| 118 | SkImageEncoder::kPNG_Type, |
| 119 | SkImageEncoder::kJPEG_Type, |
| 120 | SkImageEncoder::kWEBP_Type |
| 121 | }; |
| 122 | |
| 123 | for (size_t i = 0; i < SK_ARRAY_COUNT(types); i++) { |
| 124 | SkImageEncoder::Type type = types[i]; |
| 125 | SkAutoDataUnref encoded(create_data_from_bitmap(original, type)); |
| 126 | REPORTER_ASSERT(reporter, encoded.get() != NULL); |
| 127 | if (NULL == encoded.get()) { |
| 128 | continue; |
| 129 | } |
| 130 | SkBitmap lazy; |
| 131 | static const SkBitmapFactory::DecodeProc decoder = |
| 132 | &(SkImageDecoder::DecodeMemoryToTarget); |
| 133 | bool success = simple_bitmap_factory(decoder, encoded.get(), &lazy); |
| 134 | |
| 135 | REPORTER_ASSERT(reporter, success); |
| 136 | |
| 137 | size_t bytesUsed = SkScaledImageCache::GetBytesUsed(); |
| 138 | |
| 139 | if (oldByteLimit < bitmapSize) { |
| 140 | SkScaledImageCache::SetByteLimit(bitmapSize + oldByteLimit); |
| 141 | } |
| 142 | void* lazyPixels = NULL; |
| 143 | |
| 144 | // Since this is lazy, it shouldn't have fPixels yet! |
| 145 | REPORTER_ASSERT(reporter, NULL == lazy.getPixels()); |
| 146 | { |
| 147 | SkAutoLockPixels autoLockPixels(lazy); // now pixels are good. |
| 148 | lazyPixels = lazy.getPixels(); |
| 149 | REPORTER_ASSERT(reporter, NULL != lazy.getPixels()); |
| 150 | // first time we lock pixels, we should get bump in the size |
| 151 | // of the cache by exactly bitmapSize. |
| 152 | REPORTER_ASSERT(reporter, bytesUsed + bitmapSize |
| 153 | == SkScaledImageCache::GetBytesUsed()); |
| 154 | bytesUsed = SkScaledImageCache::GetBytesUsed(); |
| 155 | } |
| 156 | // pixels should be gone! |
| 157 | REPORTER_ASSERT(reporter, NULL == lazy.getPixels()); |
| 158 | { |
| 159 | SkAutoLockPixels autoLockPixels(lazy); // now pixels are good. |
| 160 | REPORTER_ASSERT(reporter, NULL != lazy.getPixels()); |
| 161 | |
| 162 | // verify that the same pixels are used this time. |
| 163 | REPORTER_ASSERT(reporter, lazy.getPixels() == lazyPixels); |
| 164 | } |
| 165 | |
| 166 | bool comparePixels = (SkImageEncoder::kPNG_Type == type); |
| 167 | // Only PNG is pixel-perfect. |
| 168 | compare_bitmaps(reporter, original, lazy, comparePixels); |
| 169 | |
| 170 | // force the cache to clear by making it too small. |
| 171 | SkScaledImageCache::SetByteLimit(bitmapSize / 2); |
| 172 | compare_bitmaps(reporter, original, lazy, comparePixels); |
| 173 | |
| 174 | // I'm pretty sure that the logic of the cache should mean |
| 175 | // that it will clear to zero, regardless of where it started. |
| 176 | REPORTER_ASSERT(reporter, SkScaledImageCache::GetBytesUsed() == 0); |
| 177 | // TODO(someone) - write a custom allocator that can verify |
| 178 | // that the memory where those pixels were cached really did |
| 179 | // get freed. |
| 180 | |
| 181 | //////////////////////////////////////////////////////////////////////// |
| 182 | // The following commented-out code happens to work on my |
| 183 | // machine, and indicates to me that the SkLazyPixelRef is |
| 184 | // behaving as designed. But I don't know an easy way to |
| 185 | // guarantee that a second allocation of the same size will |
| 186 | // give a different address. |
| 187 | //////////////////////////////////////////////////////////////////////// |
| 188 | // { |
| 189 | // // confuse the heap allocation system |
| 190 | // SkAutoMalloc autoMalloc(bitmapSize); |
| 191 | // REPORTER_ASSERT(reporter, autoMalloc.get() == lazyPixels); |
| 192 | // { |
| 193 | // SkAutoLockPixels autoLockPixels(lazy); |
| 194 | // // verify that *different* pixels are used this time. |
| 195 | // REPORTER_ASSERT(reporter, lazy.getPixels() != lazyPixels); |
| 196 | // compare_bitmaps(reporter, original, lazy, comparePixels); |
| 197 | // } |
| 198 | // } |
| 199 | |
| 200 | // restore cache size |
| 201 | SkScaledImageCache::SetByteLimit(oldByteLimit); |
| 202 | } |
| 203 | } |
| 204 | |