1 /* 2 * Copyright 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <compositionengine/impl/HwcBufferCache.h> 18 #include <gtest/gtest.h> 19 #include <gui/BufferQueue.h> 20 #include <ui/GraphicBuffer.h> 21 22 namespace android::compositionengine { 23 namespace { 24 25 class TestableHwcBufferCache : public impl::HwcBufferCache { 26 public: 27 void getHwcBuffer(int slot, const sp<GraphicBuffer>& buffer, uint32_t* outSlot, 28 sp<GraphicBuffer>* outBuffer) { 29 HwcBufferCache::getHwcBuffer(slot, buffer, outSlot, outBuffer); 30 } 31 }; 32 33 class HwcBufferCacheTest : public testing::Test { 34 public: 35 ~HwcBufferCacheTest() override = default; 36 37 void testSlot(const int inSlot, const uint32_t expectedSlot) { 38 uint32_t outSlot; 39 sp<GraphicBuffer> outBuffer; 40 41 // The first time, the output is the same as the input 42 mCache.getHwcBuffer(inSlot, mBuffer1, &outSlot, &outBuffer); 43 EXPECT_EQ(expectedSlot, outSlot); 44 EXPECT_EQ(mBuffer1, outBuffer); 45 46 // The second time with the same buffer, the outBuffer is nullptr. 47 mCache.getHwcBuffer(inSlot, mBuffer1, &outSlot, &outBuffer); 48 EXPECT_EQ(expectedSlot, outSlot); 49 EXPECT_EQ(nullptr, outBuffer.get()); 50 51 // With a new buffer, the outBuffer is the input. 52 mCache.getHwcBuffer(inSlot, mBuffer2, &outSlot, &outBuffer); 53 EXPECT_EQ(expectedSlot, outSlot); 54 EXPECT_EQ(mBuffer2, outBuffer); 55 56 // Again, the second request with the same buffer sets outBuffer to nullptr. 57 mCache.getHwcBuffer(inSlot, mBuffer2, &outSlot, &outBuffer); 58 EXPECT_EQ(expectedSlot, outSlot); 59 EXPECT_EQ(nullptr, outBuffer.get()); 60 61 // Setting a slot to use nullptr lookslike works, but note that 62 // the output values make it look like no new buffer is being set.... 63 mCache.getHwcBuffer(inSlot, sp<GraphicBuffer>(), &outSlot, &outBuffer); 64 EXPECT_EQ(expectedSlot, outSlot); 65 EXPECT_EQ(nullptr, outBuffer.get()); 66 } 67 68 impl::HwcBufferCache mCache; 69 sp<GraphicBuffer> mBuffer1{new GraphicBuffer(1, 1, HAL_PIXEL_FORMAT_RGBA_8888, 1, 0)}; 70 sp<GraphicBuffer> mBuffer2{new GraphicBuffer(1, 1, HAL_PIXEL_FORMAT_RGBA_8888, 1, 0)}; 71 }; 72 73 TEST_F(HwcBufferCacheTest, cacheWorksForSlotZero) { 74 testSlot(0, 0); 75 } 76 77 TEST_F(HwcBufferCacheTest, cacheWorksForMaxSlot) { 78 testSlot(BufferQueue::NUM_BUFFER_SLOTS - 1, BufferQueue::NUM_BUFFER_SLOTS - 1); 79 } 80 81 TEST_F(HwcBufferCacheTest, cacheMapsNegativeSlotToZero) { 82 testSlot(-123, 0); 83 } 84 85 } // namespace 86 } // namespace android::compositionengine 87
