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// Copyright 2021 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "tests/DawnTest.h"
#include "common/Math.h"
#include "dawn_native/DawnNative.h"
#include <algorithm>
class BufferAllocatedSizeTests : public DawnTest {
protected:
wgpu::Buffer CreateBuffer(wgpu::BufferUsage usage, uint64_t size) {
wgpu::BufferDescriptor desc = {};
desc.usage = usage;
desc.size = size;
return device.CreateBuffer(&desc);
}
void SetUp() override {
DawnTest::SetUp();
DAWN_TEST_UNSUPPORTED_IF(UsesWire());
}
};
// Test expected allocated size for buffers with uniform usage
TEST_P(BufferAllocatedSizeTests, UniformUsage) {
// Some backends have a minimum buffer size, so make sure
// we allocate above that.
constexpr uint32_t kMinBufferSize = 4u;
uint32_t requiredBufferAlignment = 1u;
if (IsD3D12()) {
requiredBufferAlignment = 256u;
} else if (IsMetal()) {
requiredBufferAlignment = 16u;
} else if (IsVulkan()) {
requiredBufferAlignment = 4u;
}
// Test uniform usage
{
const uint32_t bufferSize = kMinBufferSize;
wgpu::Buffer buffer = CreateBuffer(wgpu::BufferUsage::Uniform, bufferSize);
EXPECT_EQ(dawn_native::GetAllocatedSizeForTesting(buffer.Get()),
Align(bufferSize, requiredBufferAlignment));
}
// Test uniform usage and with size just above requiredBufferAlignment allocates to the next
// multiple of |requiredBufferAlignment|
{
const uint32_t bufferSize = std::max(1u + requiredBufferAlignment, kMinBufferSize);
wgpu::Buffer buffer =
CreateBuffer(wgpu::BufferUsage::Uniform | wgpu::BufferUsage::Storage, bufferSize);
EXPECT_EQ(dawn_native::GetAllocatedSizeForTesting(buffer.Get()),
Align(bufferSize, requiredBufferAlignment));
}
// Test uniform usage and another usage
{
const uint32_t bufferSize = kMinBufferSize;
wgpu::Buffer buffer =
CreateBuffer(wgpu::BufferUsage::Uniform | wgpu::BufferUsage::Storage, bufferSize);
EXPECT_EQ(dawn_native::GetAllocatedSizeForTesting(buffer.Get()),
Align(bufferSize, requiredBufferAlignment));
}
}
DAWN_INSTANTIATE_TEST(BufferAllocatedSizeTests,
D3D12Backend(),
MetalBackend(),
OpenGLBackend(),
OpenGLESBackend(),
VulkanBackend());