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// Copyright 2018 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 "utils/WGPUHelpers.h"
#include <array>
class ComputeCopyStorageBufferTests : public DawnTest {
public:
static constexpr int kInstances = 4;
static constexpr int kUintsPerInstance = 4;
static constexpr int kNumUints = kInstances * kUintsPerInstance;
void BasicTest(const char* shader);
};
void ComputeCopyStorageBufferTests::BasicTest(const char* shader) {
// Set up shader and pipeline
auto module = utils::CreateShaderModule(device, shader);
wgpu::ComputePipelineDescriptor csDesc;
csDesc.compute.module = module;
csDesc.compute.entryPoint = "main";
wgpu::ComputePipeline pipeline = device.CreateComputePipeline(&csDesc);
// Set up src storage buffer
wgpu::BufferDescriptor srcDesc;
srcDesc.size = kNumUints * sizeof(uint32_t);
srcDesc.usage =
wgpu::BufferUsage::Storage | wgpu::BufferUsage::CopySrc | wgpu::BufferUsage::CopyDst;
wgpu::Buffer src = device.CreateBuffer(&srcDesc);
std::array<uint32_t, kNumUints> expected;
for (uint32_t i = 0; i < kNumUints; ++i) {
expected[i] = (i + 1u) * 0x11111111u;
}
queue.WriteBuffer(src, 0, expected.data(), sizeof(expected));
EXPECT_BUFFER_U32_RANGE_EQ(expected.data(), src, 0, kNumUints);
// Set up dst storage buffer
wgpu::BufferDescriptor dstDesc;
dstDesc.size = kNumUints * sizeof(uint32_t);
dstDesc.usage =
wgpu::BufferUsage::Storage | wgpu::BufferUsage::CopySrc | wgpu::BufferUsage::CopyDst;
wgpu::Buffer dst = device.CreateBuffer(&dstDesc);
std::array<uint32_t, kNumUints> zero{};
queue.WriteBuffer(dst, 0, zero.data(), sizeof(zero));
// Set up bind group and issue dispatch
wgpu::BindGroup bindGroup = utils::MakeBindGroup(device, pipeline.GetBindGroupLayout(0),
{
{0, src, 0, kNumUints * sizeof(uint32_t)},
{1, dst, 0, kNumUints * sizeof(uint32_t)},
});
wgpu::CommandBuffer commands;
{
wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
wgpu::ComputePassEncoder pass = encoder.BeginComputePass();
pass.SetPipeline(pipeline);
pass.SetBindGroup(0, bindGroup);
pass.Dispatch(kInstances);
pass.EndPass();
commands = encoder.Finish();
}
queue.Submit(1, &commands);
EXPECT_BUFFER_U32_RANGE_EQ(expected.data(), dst, 0, kNumUints);
}
// Test that a trivial compute-shader memcpy implementation works.
TEST_P(ComputeCopyStorageBufferTests, SizedArrayOfBasic) {
BasicTest(R"(
struct Buf {
s : array<vec4<u32>, 4>;
};
[[group(0), binding(0)]] var<storage, read_write> src : Buf;
[[group(0), binding(1)]] var<storage, read_write> dst : Buf;
[[stage(compute), workgroup_size(1)]]
fn main([[builtin(global_invocation_id)]] GlobalInvocationID : vec3<u32>) {
let index : u32 = GlobalInvocationID.x;
if (index >= 4u) { return; }
dst.s[index] = src.s[index];
})");
}
// Test that a slightly-less-trivial compute-shader memcpy implementation works.
TEST_P(ComputeCopyStorageBufferTests, SizedArrayOfStruct) {
BasicTest(R"(
struct S {
a : vec2<u32>;
b : vec2<u32>;
};
struct Buf {
s : array<S, 4>;
};
[[group(0), binding(0)]] var<storage, read_write> src : Buf;
[[group(0), binding(1)]] var<storage, read_write> dst : Buf;
[[stage(compute), workgroup_size(1)]]
fn main([[builtin(global_invocation_id)]] GlobalInvocationID : vec3<u32>) {
let index : u32 = GlobalInvocationID.x;
if (index >= 4u) { return; }
dst.s[index] = src.s[index];
})");
}
// Test that a trivial compute-shader memcpy implementation works.
TEST_P(ComputeCopyStorageBufferTests, UnsizedArrayOfBasic) {
BasicTest(R"(
struct Buf {
s : array<vec4<u32>>;
};
[[group(0), binding(0)]] var<storage, read_write> src : Buf;
[[group(0), binding(1)]] var<storage, read_write> dst : Buf;
[[stage(compute), workgroup_size(1)]]
fn main([[builtin(global_invocation_id)]] GlobalInvocationID : vec3<u32>) {
let index : u32 = GlobalInvocationID.x;
if (index >= 4u) { return; }
dst.s[index] = src.s[index];
})");
}
DAWN_INSTANTIATE_TEST(ComputeCopyStorageBufferTests,
D3D12Backend(),
MetalBackend(),
OpenGLBackend(),
OpenGLESBackend(),
VulkanBackend());