sampler_library_vk_unittests.cc

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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 <memory>
#include "flutter/testing/testing.h"  // IWYU pragma: keep
#include "gtest/gtest.h"
#include "impeller/core/formats.h"
#include "impeller/core/sampler_descriptor.h"
#include "impeller/renderer/backend/vulkan/command_pool_vk.h"
#include "impeller/renderer/backend/vulkan/sampler_library_vk.h"
#include "impeller/renderer/backend/vulkan/test/mock_vulkan.h"
#include "impeller/renderer/backend/vulkan/workarounds_vk.h"
 
namespace impeller {
namespace testing {
 
TEST(SamplerLibraryVK, WorkaroundsCanDisableReadingFromMipLevels) {
  auto const context = MockVulkanContextBuilder().Build();
 
  auto library_vk = std::make_shared<SamplerLibraryVK>(
      context->GetDeviceHolder(), /*max_sampler_anisotropy=*/1u);
  std::shared_ptr<SamplerLibrary> library = library_vk;
 
  SamplerDescriptor desc;
  desc.mip_filter = MipFilter::kLinear;
 
  auto sampler = library->GetSampler(desc);
  EXPECT_EQ(sampler->GetDescriptor().mip_filter, MipFilter::kLinear);
 
  // Apply mips disabled workaround.
  library_vk->ApplyWorkarounds(WorkaroundsVK{.broken_mipmap_generation = true});
 
  sampler = library->GetSampler(desc);
  EXPECT_EQ(sampler->GetDescriptor().mip_filter, MipFilter::kBase);
}
 
TEST(SamplerLibraryVK, MaxAnisotropyIsClampedToTheDeviceLimit) {
  auto const context = MockVulkanContextBuilder().Build();
 
  std::shared_ptr<SamplerLibrary> library = std::make_shared<SamplerLibraryVK>(
      context->GetDeviceHolder(), /*max_sampler_anisotropy=*/4u);
 
  SamplerDescriptor desc;
  desc.min_filter = MinMagFilter::kLinear;
  desc.mag_filter = MinMagFilter::kLinear;
  desc.mip_filter = MipFilter::kLinear;
  desc.max_anisotropy = 16;
 
  auto sampler = library->GetSampler(desc);
  EXPECT_EQ(sampler->GetDescriptor().max_anisotropy, 4u);
 
  // Clamped values share a cache entry.
  desc.max_anisotropy = 8;
  EXPECT_EQ(library->GetSampler(desc), sampler);
}
 
TEST(SamplerLibraryVK, MaxAnisotropyIsDisabledWhenUnsupported) {
  auto const context = MockVulkanContextBuilder().Build();
 
  std::shared_ptr<SamplerLibrary> library = std::make_shared<SamplerLibraryVK>(
      context->GetDeviceHolder(), /*max_sampler_anisotropy=*/1u);
 
  SamplerDescriptor desc;
  desc.min_filter = MinMagFilter::kLinear;
  desc.mag_filter = MinMagFilter::kLinear;
  desc.mip_filter = MipFilter::kLinear;
  desc.max_anisotropy = 16;
 
  auto sampler = library->GetSampler(desc);
  EXPECT_EQ(sampler->GetDescriptor().max_anisotropy, 1u);
}
 
}  // namespace testing
}  // namespace impeller