| /* |
| * 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 "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkData.h" |
| #include "SkForceLinking.h" |
| #include "SkImageDecoder.h" |
| #include "SkImagePriv.h" |
| #include "SkLazyPixelRef.h" |
| #include "SkScaledImageCache.h" |
| #include "SkStream.h" |
| #include "Test.h" |
| |
| __SK_FORCE_IMAGE_DECODER_LINKING; |
| |
| /** |
| * Fill this bitmap with some color. |
| */ |
| static void make_test_image(SkBitmap* bm) { |
| static const int W = 50, H = 50; |
| static const SkBitmap::Config config = SkBitmap::kARGB_8888_Config; |
| bm->setConfig(config, W, H); |
| bm->allocPixels(); |
| bm->eraseColor(SK_ColorBLACK); |
| SkCanvas canvas(*bm); |
| SkPaint paint; |
| paint.setColor(SK_ColorBLUE); |
| canvas.drawRectCoords(0, 0, SkIntToScalar(W/2), |
| SkIntToScalar(H/2), paint); |
| paint.setColor(SK_ColorWHITE); |
| canvas.drawRectCoords(SkIntToScalar(W/2), SkIntToScalar(H/2), |
| SkIntToScalar(W), SkIntToScalar(H), paint); |
| } |
| |
| /** |
| * encode this bitmap into some data via SkImageEncoder |
| */ |
| static SkData* create_data_from_bitmap(const SkBitmap& bm, |
| SkImageEncoder::Type type) { |
| SkDynamicMemoryWStream stream; |
| if (SkImageEncoder::EncodeStream(&stream, bm, type, 100)) { |
| return stream.copyToData(); |
| } |
| return NULL; |
| } |
| |
| /** |
| * A simplified version of SkBitmapFactory |
| */ |
| static bool simple_bitmap_factory(SkBitmapFactory::DecodeProc proc, |
| SkData* data, |
| SkBitmap* dst) { |
| SkImageInfo info; |
| if (!proc(data->data(), data->size(), &info, NULL)) { |
| return false; |
| } |
| dst->setConfig(SkImageInfoToBitmapConfig(info), info.fWidth, |
| info.fHeight, 0, info.fAlphaType); |
| SkAutoTUnref<SkLazyPixelRef> ref(SkNEW_ARGS(SkLazyPixelRef, |
| (data, proc, NULL))); |
| dst->setPixelRef(ref); |
| return true; |
| } |
| |
| static void compare_bitmaps(skiatest::Reporter* reporter, |
| const SkBitmap& b1, const SkBitmap& b2, |
| bool pixelPerfect = true) { |
| REPORTER_ASSERT(reporter, b1.empty() == b2.empty()); |
| REPORTER_ASSERT(reporter, b1.width() == b2.width()); |
| REPORTER_ASSERT(reporter, b1.height() == b2.height()); |
| REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull()); |
| SkAutoLockPixels autoLockPixels1(b1); |
| SkAutoLockPixels autoLockPixels2(b2); |
| REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull()); |
| if (b1.isNull() || b1.empty()) { |
| return; |
| } |
| REPORTER_ASSERT(reporter, NULL != b1.getPixels()); |
| REPORTER_ASSERT(reporter, NULL != b2.getPixels()); |
| if ((!(b1.getPixels())) || (!(b2.getPixels()))) { |
| return; |
| } |
| if ((b1.width() != b2.width()) || |
| (b1.height() != b2.height())) { |
| return; |
| } |
| if (!pixelPerfect) { |
| return; |
| } |
| int pixelErrors = 0; |
| for (int y = 0; y < b2.height(); ++y) { |
| for (int x = 0; x < b2.width(); ++x) { |
| if (b1.getColor(x, y) != b2.getColor(x, y)) { |
| ++pixelErrors; |
| } |
| } |
| } |
| REPORTER_ASSERT(reporter, 0 == pixelErrors); |
| } |
| |
| /** |
| * This checks to see that a SkLazyPixelRef works as advertized. |
| */ |
| #include "TestClassDef.h" |
| DEF_TEST(CachedDecodingPixelRefTest, reporter) { |
| SkBitmap original; |
| make_test_image(&original); |
| const size_t bitmapSize = original.getSize(); |
| const size_t oldByteLimit = SkScaledImageCache::GetByteLimit(); |
| REPORTER_ASSERT(reporter, (!(original.empty())) && (!(original.isNull()))); |
| |
| static const SkImageEncoder::Type types[] = { |
| SkImageEncoder::kPNG_Type, |
| SkImageEncoder::kJPEG_Type, |
| SkImageEncoder::kWEBP_Type |
| }; |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(types); i++) { |
| SkImageEncoder::Type type = types[i]; |
| SkAutoDataUnref encoded(create_data_from_bitmap(original, type)); |
| REPORTER_ASSERT(reporter, encoded.get() != NULL); |
| if (NULL == encoded.get()) { |
| continue; |
| } |
| SkBitmap lazy; |
| static const SkBitmapFactory::DecodeProc decoder = |
| &(SkImageDecoder::DecodeMemoryToTarget); |
| bool success = simple_bitmap_factory(decoder, encoded.get(), &lazy); |
| |
| REPORTER_ASSERT(reporter, success); |
| |
| size_t bytesUsed = SkScaledImageCache::GetBytesUsed(); |
| |
| if (oldByteLimit < bitmapSize) { |
| SkScaledImageCache::SetByteLimit(bitmapSize + oldByteLimit); |
| } |
| void* lazyPixels = NULL; |
| |
| // Since this is lazy, it shouldn't have fPixels yet! |
| REPORTER_ASSERT(reporter, NULL == lazy.getPixels()); |
| { |
| SkAutoLockPixels autoLockPixels(lazy); // now pixels are good. |
| lazyPixels = lazy.getPixels(); |
| REPORTER_ASSERT(reporter, NULL != lazy.getPixels()); |
| // first time we lock pixels, we should get bump in the size |
| // of the cache by exactly bitmapSize. |
| REPORTER_ASSERT(reporter, bytesUsed + bitmapSize |
| == SkScaledImageCache::GetBytesUsed()); |
| bytesUsed = SkScaledImageCache::GetBytesUsed(); |
| } |
| // pixels should be gone! |
| REPORTER_ASSERT(reporter, NULL == lazy.getPixels()); |
| { |
| SkAutoLockPixels autoLockPixels(lazy); // now pixels are good. |
| REPORTER_ASSERT(reporter, NULL != lazy.getPixels()); |
| |
| // verify that the same pixels are used this time. |
| REPORTER_ASSERT(reporter, lazy.getPixels() == lazyPixels); |
| } |
| |
| bool comparePixels = (SkImageEncoder::kPNG_Type == type); |
| // Only PNG is pixel-perfect. |
| compare_bitmaps(reporter, original, lazy, comparePixels); |
| |
| // force the cache to clear by making it too small. |
| SkScaledImageCache::SetByteLimit(bitmapSize / 2); |
| compare_bitmaps(reporter, original, lazy, comparePixels); |
| |
| // I'm pretty sure that the logic of the cache should mean |
| // that it will clear to zero, regardless of where it started. |
| REPORTER_ASSERT(reporter, SkScaledImageCache::GetBytesUsed() == 0); |
| // TODO(someone) - write a custom allocator that can verify |
| // that the memory where those pixels were cached really did |
| // get freed. |
| |
| //////////////////////////////////////////////////////////////////////// |
| // The following commented-out code happens to work on my |
| // machine, and indicates to me that the SkLazyPixelRef is |
| // behaving as designed. But I don't know an easy way to |
| // guarantee that a second allocation of the same size will |
| // give a different address. |
| //////////////////////////////////////////////////////////////////////// |
| // { |
| // // confuse the heap allocation system |
| // SkAutoMalloc autoMalloc(bitmapSize); |
| // REPORTER_ASSERT(reporter, autoMalloc.get() == lazyPixels); |
| // { |
| // SkAutoLockPixels autoLockPixels(lazy); |
| // // verify that *different* pixels are used this time. |
| // REPORTER_ASSERT(reporter, lazy.getPixels() != lazyPixels); |
| // compare_bitmaps(reporter, original, lazy, comparePixels); |
| // } |
| // } |
| |
| // restore cache size |
| SkScaledImageCache::SetByteLimit(oldByteLimit); |
| } |
| } |