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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, utils::SingleShaderStage::Compute, shader);
wgpu::ComputePipelineDescriptor csDesc;
csDesc.computeStage.module = module;
csDesc.computeStage.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"(
#version 450
#define kInstances 4
layout(std140, set = 0, binding = 0) buffer Src { uvec4 s[kInstances]; } src;
layout(std140, set = 0, binding = 1) buffer Dst { uvec4 s[kInstances]; } dst;
void main() {
uint index = gl_GlobalInvocationID.x;
if (index >= kInstances) { return; }
dst.s[index] = src.s[index];
})");
}
// Test that a slightly-less-trivial compute-shader memcpy implementation works.
TEST_P(ComputeCopyStorageBufferTests, SizedArrayOfStruct) {
BasicTest(R"(
#version 450
#define kInstances 4
struct S {
uvec2 a, b; // kUintsPerInstance = 4
};
layout(std140, set = 0, binding = 0) buffer Src { S s[kInstances]; } src;
layout(std140, set = 0, binding = 1) buffer Dst { S s[kInstances]; } dst;
void main() {
uint index = gl_GlobalInvocationID.x;
if (index >= kInstances) { return; }
dst.s[index] = src.s[index];
})");
}
// Test that a trivial compute-shader memcpy implementation works.
TEST_P(ComputeCopyStorageBufferTests, UnsizedArrayOfBasic) {
BasicTest(R"(
#version 450
#define kInstances 4
layout(std140, set = 0, binding = 0) buffer Src { uvec4 s[]; } src;
layout(std140, set = 0, binding = 1) buffer Dst { uvec4 s[]; } dst;
void main() {
uint index = gl_GlobalInvocationID.x;
if (index >= kInstances) { return; }
dst.s[index] = src.s[index];
})");
}
// Test binding a sized array of SSBO descriptors.
//
// This is disabled because WebGPU doesn't currently have binding arrays (equivalent to
// VkDescriptorSetLayoutBinding::descriptorCount). https://github.com/gpuweb/gpuweb/pull/61
TEST_P(ComputeCopyStorageBufferTests, DISABLED_SizedDescriptorArray) {
BasicTest(R"(
#version 450
#define kInstances 4
struct S {
uvec2 a, b; // kUintsPerInstance = 4
};
layout(std140, set = 0, binding = 0) buffer Src { S s; } src[kInstances];
layout(std140, set = 0, binding = 1) buffer Dst { S s; } dst[kInstances];
void main() {
uint index = gl_GlobalInvocationID.x;
if (index >= kInstances) { return; }
dst[index].s = src[index].s;
})");
}
// Test binding an unsized array of SSBO descriptors.
//
// TODO(kainino@chromium.org): This test may be somewhat wrong. I'm not sure whether this is
// supposed to be possible on the various native APIs.
// Linking on OpenGL fails with "OpenGL requires constant indexes for unsized array access(dst)".
TEST_P(ComputeCopyStorageBufferTests, DISABLED_UnsizedDescriptorArray) {
BasicTest(R"(
#version 450
#extension GL_EXT_nonuniform_qualifier : require
#define kInstances 4
struct S {
uvec2 a, b; // kUintsPerInstance = 4
};
layout(std140, set = 0, binding = 0) buffer Src { S s; } src[];
layout(std140, set = 0, binding = 1) buffer Dst { S s; } dst[];
void main() {
uint index = gl_GlobalInvocationID.x;
if (index >= kInstances) { return; }
dst[index].s = src[index].s;
})");
}
DAWN_INSTANTIATE_TEST(ComputeCopyStorageBufferTests,
D3D12Backend(),
MetalBackend(),
OpenGLBackend(),
VulkanBackend());