allocator_mtl_unittests.mm

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "flutter/testing/testing.h"
#include "impeller/core/formats.h"
#include "impeller/core/texture_descriptor.h"
#include "impeller/playground/playground_test.h"
#include "impeller/renderer/backend/metal/allocator_mtl.h"
#include "impeller/renderer/backend/metal/context_mtl.h"
#include "impeller/renderer/backend/metal/formats_mtl.h"
#include "impeller/renderer/backend/metal/lazy_drawable_holder.h"
#include "impeller/renderer/backend/metal/texture_mtl.h"
#include "impeller/renderer/capabilities.h"
 
#include <QuartzCore/CAMetalLayer.h>
#include <memory>
#include <thread>
 
#include "gtest/gtest.h"
 
namespace impeller {
namespace testing {
 
using AllocatorMTLTest = PlaygroundTest;
INSTANTIATE_METAL_PLAYGROUND_SUITE(AllocatorMTLTest);
 
TEST_P(AllocatorMTLTest, DebugTraceMemoryStatistics) {
  auto& context_mtl = ContextMTL::Cast(*GetContext());
  const auto& allocator = context_mtl.GetResourceAllocator();
 
  EXPECT_EQ(allocator->DebugGetHeapUsage().ConvertTo<MebiBytes>().GetSize(),
            0u);
 
  // Memoryless texture does not increase allocated size.
  {
    TextureDescriptor desc;
    desc.format = PixelFormat::kR8G8B8A8UNormInt;
    desc.storage_mode = StorageMode::kDeviceTransient;
    desc.size = {1024, 1024};
    auto texture_1 = allocator->CreateTexture(desc);
 
    // Private storage texture increases allocated size.
    desc.storage_mode = StorageMode::kDevicePrivate;
    auto texture_2 = allocator->CreateTexture(desc);
 
#ifdef IMPELLER_DEBUG
    EXPECT_EQ(allocator->DebugGetHeapUsage().ConvertTo<MebiBytes>().GetSize(),
              4u);
#else
    EXPECT_EQ(allocator->DebugGetHeapUsage().ConvertTo<MebiBytes>().GetSize(),
              0u);
#endif  // IMPELLER_DEBUG
 
    // Host storage texture increases allocated size.
    desc.storage_mode = StorageMode::kHostVisible;
    auto texture_3 = allocator->CreateTexture(desc);
 
#ifdef IMPELLER_DEBUG
    EXPECT_EQ(allocator->DebugGetHeapUsage().ConvertTo<MebiBytes>().GetSize(),
              8u);
#else
    EXPECT_EQ(allocator->DebugGetHeapUsage().ConvertTo<MebiBytes>().GetSize(),
              0u);
#endif  // IMPELLER_DEBUG
  }
 
  // After all textures are out of scope, memory has been decremented.
  EXPECT_EQ(allocator->DebugGetHeapUsage().ConvertTo<MebiBytes>().GetSize(),
            0u);
}
 
}  // namespace testing
}  // namespace impeller