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// Copyright 2021 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <algorithm>
#include "dawn/tests/DawnTest.h"
#include "dawn/common/Math.h"
#include "dawn/native/DawnNative.h"
namespace dawn {
namespace {
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(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(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(native::GetAllocatedSizeForTesting(buffer.Get()),
Align(bufferSize, requiredBufferAlignment));
}
}
DAWN_INSTANTIATE_TEST(BufferAllocatedSizeTests,
D3D12Backend(),
MetalBackend(),
OpenGLBackend(),
OpenGLESBackend(),
VulkanBackend());
} // anonymous namespace
} // namespace dawn