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// Copyright 2020 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/unittests/validation/ValidationTest.h"
#include "common/Assert.h"
#include "common/Constants.h"
#include "utils/ComboRenderPipelineDescriptor.h"
#include "utils/WGPUHelpers.h"
namespace {
// Helper for describing bindings throughout the tests
struct BindingDescriptor {
uint32_t group;
uint32_t binding;
std::string decl;
std::string ref_type;
std::string ref_mem;
uint64_t size;
wgpu::BufferBindingType type = wgpu::BufferBindingType::Storage;
wgpu::ShaderStage visibility = wgpu::ShaderStage::Compute | wgpu::ShaderStage::Fragment;
};
// Runs |func| with a modified version of |originalSizes| as an argument, adding |offset| to
// each element one at a time This is useful to verify some behavior happens if any element is
// offset from original
template <typename F>
void WithEachSizeOffsetBy(int64_t offset, const std::vector<uint64_t>& originalSizes, F func) {
std::vector<uint64_t> modifiedSizes = originalSizes;
for (size_t i = 0; i < originalSizes.size(); ++i) {
if (offset < 0) {
ASSERT(originalSizes[i] >= static_cast<uint64_t>(-offset));
}
// Run the function with an element offset, and restore element afterwards
modifiedSizes[i] += offset;
func(modifiedSizes);
modifiedSizes[i] -= offset;
}
}
// Runs |func| with |correctSizes|, and an expectation of success and failure
template <typename F>
void CheckSizeBounds(const std::vector<uint64_t>& correctSizes, F func) {
// To validate size:
// Check invalid with bind group with one less
// Check valid with bind group with correct size
// Make sure (every size - 1) produces an error
WithEachSizeOffsetBy(-1, correctSizes,
[&](const std::vector<uint64_t>& sizes) { func(sizes, false); });
// Make sure correct sizes work
func(correctSizes, true);
// Make sure (every size + 1) works
WithEachSizeOffsetBy(1, correctSizes,
[&](const std::vector<uint64_t>& sizes) { func(sizes, true); });
}
// Creates a bind group with given bindings for shader text
std::string GenerateBindingString(const std::vector<BindingDescriptor>& bindings) {
std::ostringstream ostream;
size_t index = 0;
for (const BindingDescriptor& b : bindings) {
ostream << "[[block]] struct S" << index << " { " << b.decl << "};\n";
ostream << "[[group(" << b.group << "), binding(" << b.binding << ")]] ";
switch (b.type) {
case wgpu::BufferBindingType::Uniform:
ostream << "var<uniform> b" << index << " : S" << index << ";\n";
break;
case wgpu::BufferBindingType::Storage:
ostream << "var<storage> b" << index << " : [[access(read_write)]] S" << index
<< ";\n";
break;
case wgpu::BufferBindingType::ReadOnlyStorage:
ostream << "var<storage> b" << index << " : [[access(read)]] S" << index
<< ";\n";
break;
default:
UNREACHABLE();
}
index++;
}
return ostream.str();
}
std::string GenerateReferenceString(const std::vector<BindingDescriptor>& bindings,
wgpu::ShaderStage stage) {
std::ostringstream ostream;
size_t index = 0;
for (const BindingDescriptor& b : bindings) {
if (b.visibility & stage) {
if (!b.ref_type.empty() && !b.ref_mem.empty()) {
ostream << "var r" << index << " : " << b.ref_type << " = b" << index << "."
<< b.ref_mem << ";\n";
}
}
index++;
}
return ostream.str();
}
// Used for adding custom types available throughout the tests
static const std::string kStructs = "struct ThreeFloats {f1 : f32; f2 : f32; f3 : f32;};\n";
// Creates a compute shader with given bindings
std::string CreateComputeShaderWithBindings(const std::vector<BindingDescriptor>& bindings) {
return kStructs + GenerateBindingString(bindings) +
"[[stage(compute), workgroup_size(1,1,1)]] fn main() {\n" +
GenerateReferenceString(bindings, wgpu::ShaderStage::Compute) + "}";
}
// Creates a vertex shader with given bindings
std::string CreateVertexShaderWithBindings(const std::vector<BindingDescriptor>& bindings) {
return kStructs + GenerateBindingString(bindings) + "[[stage(vertex)]] fn main() {\n" +
GenerateReferenceString(bindings, wgpu::ShaderStage::Vertex) + "}";
}
// Creates a fragment shader with given bindings
std::string CreateFragmentShaderWithBindings(const std::vector<BindingDescriptor>& bindings) {
return kStructs + GenerateBindingString(bindings) + "[[stage(fragment)]] fn main() {\n" +
GenerateReferenceString(bindings, wgpu::ShaderStage::Fragment) + "}";
}
// Concatenates vectors containing BindingDescriptor
std::vector<BindingDescriptor> CombineBindings(
std::initializer_list<std::vector<BindingDescriptor>> bindings) {
std::vector<BindingDescriptor> result;
for (const std::vector<BindingDescriptor>& b : bindings) {
result.insert(result.end(), b.begin(), b.end());
}
return result;
}
} // namespace
class MinBufferSizeTestsBase : public ValidationTest {
public:
void SetUp() override {
ValidationTest::SetUp();
}
wgpu::Buffer CreateBuffer(uint64_t bufferSize, wgpu::BufferUsage usage) {
wgpu::BufferDescriptor bufferDescriptor;
bufferDescriptor.size = bufferSize;
bufferDescriptor.usage = usage;
return device.CreateBuffer(&bufferDescriptor);
}
// Creates compute pipeline given a layout and shader
wgpu::ComputePipeline CreateComputePipeline(const std::vector<wgpu::BindGroupLayout>& layouts,
const std::string& shader) {
wgpu::ShaderModule csModule = utils::CreateShaderModule(device, shader.c_str());
wgpu::ComputePipelineDescriptor csDesc;
csDesc.layout = nullptr;
if (!layouts.empty()) {
wgpu::PipelineLayoutDescriptor descriptor;
descriptor.bindGroupLayoutCount = layouts.size();
descriptor.bindGroupLayouts = layouts.data();
csDesc.layout = device.CreatePipelineLayout(&descriptor);
}
csDesc.computeStage.module = csModule;
csDesc.computeStage.entryPoint = "main";
return device.CreateComputePipeline(&csDesc);
}
// Creates compute pipeline with default layout
wgpu::ComputePipeline CreateComputePipelineWithDefaultLayout(const std::string& shader) {
return CreateComputePipeline({}, shader);
}
// Creates render pipeline give na layout and shaders
wgpu::RenderPipeline CreateRenderPipeline(const std::vector<wgpu::BindGroupLayout>& layouts,
const std::string& vertexShader,
const std::string& fragShader) {
wgpu::ShaderModule vsModule = utils::CreateShaderModule(device, vertexShader.c_str());
wgpu::ShaderModule fsModule = utils::CreateShaderModule(device, fragShader.c_str());
utils::ComboRenderPipelineDescriptor2 pipelineDescriptor;
pipelineDescriptor.vertex.module = vsModule;
pipelineDescriptor.cFragment.module = fsModule;
pipelineDescriptor.layout = nullptr;
if (!layouts.empty()) {
wgpu::PipelineLayoutDescriptor descriptor;
descriptor.bindGroupLayoutCount = layouts.size();
descriptor.bindGroupLayouts = layouts.data();
pipelineDescriptor.layout = device.CreatePipelineLayout(&descriptor);
}
return device.CreateRenderPipeline2(&pipelineDescriptor);
}
// Creates render pipeline with default layout
wgpu::RenderPipeline CreateRenderPipelineWithDefaultLayout(const std::string& vertexShader,
const std::string& fragShader) {
return CreateRenderPipeline({}, vertexShader, fragShader);
}
// Creates bind group layout with given minimum sizes for each binding
wgpu::BindGroupLayout CreateBindGroupLayout(const std::vector<BindingDescriptor>& bindings,
const std::vector<uint64_t>& minimumSizes) {
ASSERT(bindings.size() == minimumSizes.size());
std::vector<wgpu::BindGroupLayoutEntry> entries;
for (size_t i = 0; i < bindings.size(); ++i) {
const BindingDescriptor& b = bindings[i];
wgpu::BindGroupLayoutEntry e = {};
e.binding = b.binding;
e.visibility = b.visibility;
e.buffer.type = b.type;
e.buffer.minBindingSize = minimumSizes[i];
entries.push_back(e);
}
wgpu::BindGroupLayoutDescriptor descriptor;
descriptor.entryCount = static_cast<uint32_t>(entries.size());
descriptor.entries = entries.data();
return device.CreateBindGroupLayout(&descriptor);
}
// Extract the first bind group from a compute shader
wgpu::BindGroupLayout GetBGLFromComputeShader(const std::string& shader, uint32_t index) {
wgpu::ComputePipeline pipeline = CreateComputePipelineWithDefaultLayout(shader);
return pipeline.GetBindGroupLayout(index);
}
// Extract the first bind group from a render pass
wgpu::BindGroupLayout GetBGLFromRenderShaders(const std::string& vertexShader,
const std::string& fragShader,
uint32_t index) {
wgpu::RenderPipeline pipeline =
CreateRenderPipelineWithDefaultLayout(vertexShader, fragShader);
return pipeline.GetBindGroupLayout(index);
}
// Create a bind group with given binding sizes for each entry (backed by the same buffer)
wgpu::BindGroup CreateBindGroup(wgpu::BindGroupLayout layout,
const std::vector<BindingDescriptor>& bindings,
const std::vector<uint64_t>& bindingSizes) {
ASSERT(bindings.size() == bindingSizes.size());
wgpu::Buffer buffer =
CreateBuffer(1024, wgpu::BufferUsage::Uniform | wgpu::BufferUsage::Storage);
std::vector<wgpu::BindGroupEntry> entries;
entries.reserve(bindingSizes.size());
for (uint32_t i = 0; i < bindingSizes.size(); ++i) {
wgpu::BindGroupEntry entry = {};
entry.binding = bindings[i].binding;
entry.buffer = buffer;
ASSERT(bindingSizes[i] < 1024);
entry.size = bindingSizes[i];
entries.push_back(entry);
}
wgpu::BindGroupDescriptor descriptor;
descriptor.layout = layout;
descriptor.entryCount = entries.size();
descriptor.entries = entries.data();
return device.CreateBindGroup(&descriptor);
}
// Runs a single dispatch with given pipeline and bind group (to test lazy validation during
// dispatch)
void TestDispatch(const wgpu::ComputePipeline& computePipeline,
const std::vector<wgpu::BindGroup>& bindGroups,
bool expectation) {
wgpu::CommandEncoder commandEncoder = device.CreateCommandEncoder();
wgpu::ComputePassEncoder computePassEncoder = commandEncoder.BeginComputePass();
computePassEncoder.SetPipeline(computePipeline);
for (size_t i = 0; i < bindGroups.size(); ++i) {
computePassEncoder.SetBindGroup(i, bindGroups[i]);
}
computePassEncoder.Dispatch(1);
computePassEncoder.EndPass();
if (!expectation) {
ASSERT_DEVICE_ERROR(commandEncoder.Finish());
} else {
commandEncoder.Finish();
}
}
// Runs a single draw with given pipeline and bind group (to test lazy validation during draw)
void TestDraw(const wgpu::RenderPipeline& renderPipeline,
const std::vector<wgpu::BindGroup>& bindGroups,
bool expectation) {
DummyRenderPass renderPass(device);
wgpu::CommandEncoder commandEncoder = device.CreateCommandEncoder();
wgpu::RenderPassEncoder renderPassEncoder = commandEncoder.BeginRenderPass(&renderPass);
renderPassEncoder.SetPipeline(renderPipeline);
for (size_t i = 0; i < bindGroups.size(); ++i) {
renderPassEncoder.SetBindGroup(i, bindGroups[i]);
}
renderPassEncoder.Draw(3);
renderPassEncoder.EndPass();
if (!expectation) {
ASSERT_DEVICE_ERROR(commandEncoder.Finish());
} else {
commandEncoder.Finish();
}
}
};
// The check between BGL and pipeline at pipeline creation time
class MinBufferSizePipelineCreationTests : public MinBufferSizeTestsBase {};
// Pipeline can be created if minimum buffer size in layout is specified as 0
TEST_F(MinBufferSizePipelineCreationTests, ZeroMinBufferSize) {
std::vector<BindingDescriptor> bindings = {{0, 0, "a : f32; b : f32;", "f32", "a", 8},
{0, 1, "c : f32;", "f32", "c", 4}};
std::string computeShader = CreateComputeShaderWithBindings(bindings);
std::string vertexShader = CreateVertexShaderWithBindings({});
std::string fragShader = CreateFragmentShaderWithBindings(bindings);
wgpu::BindGroupLayout layout = CreateBindGroupLayout(bindings, {0, 0});
CreateRenderPipeline({layout}, vertexShader, fragShader);
CreateComputePipeline({layout}, computeShader);
}
// Fail if layout given has non-zero minimum sizes smaller than shader requirements
TEST_F(MinBufferSizePipelineCreationTests, LayoutSizesTooSmall) {
std::vector<BindingDescriptor> bindings = {{0, 0, "a : f32; b : f32;", "f32", "a", 8},
{0, 1, "c : f32;", "f32", "c", 4}};
std::string computeShader = CreateComputeShaderWithBindings(bindings);
std::string vertexShader = CreateVertexShaderWithBindings({});
std::string fragShader = CreateFragmentShaderWithBindings(bindings);
CheckSizeBounds({8, 4}, [&](const std::vector<uint64_t>& sizes, bool expectation) {
wgpu::BindGroupLayout layout = CreateBindGroupLayout(bindings, sizes);
if (expectation) {
CreateRenderPipeline({layout}, vertexShader, fragShader);
CreateComputePipeline({layout}, computeShader);
} else {
ASSERT_DEVICE_ERROR(CreateRenderPipeline({layout}, vertexShader, fragShader));
ASSERT_DEVICE_ERROR(CreateComputePipeline({layout}, computeShader));
}
});
}
// Fail if layout given has non-zero minimum sizes smaller than shader requirements
TEST_F(MinBufferSizePipelineCreationTests, LayoutSizesTooSmallMultipleGroups) {
std::vector<BindingDescriptor> bg0Bindings = {{0, 0, "a : f32; b : f32;", "f32", "a", 8},
{0, 1, "c : f32;", "f32", "c", 4}};
std::vector<BindingDescriptor> bg1Bindings = {
{1, 0, "d : f32; e : f32; f : f32;", "f32", "e", 12},
{1, 1, "g : mat2x2<f32>;", "mat2x2<f32>", "g", 16}};
std::vector<BindingDescriptor> bindings = CombineBindings({bg0Bindings, bg1Bindings});
std::string computeShader = CreateComputeShaderWithBindings(bindings);
std::string vertexShader = CreateVertexShaderWithBindings({});
std::string fragShader = CreateFragmentShaderWithBindings(bindings);
CheckSizeBounds({8, 4, 12, 16}, [&](const std::vector<uint64_t>& sizes, bool expectation) {
wgpu::BindGroupLayout layout0 = CreateBindGroupLayout(bg0Bindings, {sizes[0], sizes[1]});
wgpu::BindGroupLayout layout1 = CreateBindGroupLayout(bg1Bindings, {sizes[2], sizes[3]});
if (expectation) {
CreateRenderPipeline({layout0, layout1}, vertexShader, fragShader);
CreateComputePipeline({layout0, layout1}, computeShader);
} else {
ASSERT_DEVICE_ERROR(CreateRenderPipeline({layout0, layout1}, vertexShader, fragShader));
ASSERT_DEVICE_ERROR(CreateComputePipeline({layout0, layout1}, computeShader));
}
});
}
// The check between the BGL and the bindings at bindgroup creation time
class MinBufferSizeBindGroupCreationTests : public MinBufferSizeTestsBase {};
// Fail if a binding is smaller than minimum buffer size
TEST_F(MinBufferSizeBindGroupCreationTests, BindingTooSmall) {
std::vector<BindingDescriptor> bindings = {{0, 0, "a : f32; b : f32;", "f32", "a", 8},
{0, 1, "c : f32;", "f32", "c", 4}};
wgpu::BindGroupLayout layout = CreateBindGroupLayout(bindings, {8, 4});
CheckSizeBounds({8, 4}, [&](const std::vector<uint64_t>& sizes, bool expectation) {
if (expectation) {
CreateBindGroup(layout, bindings, sizes);
} else {
ASSERT_DEVICE_ERROR(CreateBindGroup(layout, bindings, sizes));
}
});
}
// Check two layouts with different minimum size are unequal
TEST_F(MinBufferSizeBindGroupCreationTests, LayoutEquality) {
// Returning the same pointer is an implementation detail of Dawn Native.
// It is not the same semantic with the Wire.
DAWN_SKIP_TEST_IF(UsesWire());
auto MakeLayout = [&](uint64_t size) {
return utils::MakeBindGroupLayout(
device,
{{0, wgpu::ShaderStage::Compute, wgpu::BufferBindingType::Uniform, false, size}});
};
EXPECT_EQ(MakeLayout(0).Get(), MakeLayout(0).Get());
EXPECT_NE(MakeLayout(0).Get(), MakeLayout(4).Get());
}
// The check between the bindgroup binding sizes and the required pipeline sizes at draw time
class MinBufferSizeDrawTimeValidationTests : public MinBufferSizeTestsBase {};
// Fail if binding sizes are too small at draw time
TEST_F(MinBufferSizeDrawTimeValidationTests, ZeroMinSizeAndTooSmallBinding) {
std::vector<BindingDescriptor> bindings = {{0, 0, "a : f32; b : f32;", "f32", "a", 8},
{0, 1, "c : f32;", "f32", "c", 4}};
std::string computeShader = CreateComputeShaderWithBindings(bindings);
std::string vertexShader = CreateVertexShaderWithBindings({});
std::string fragShader = CreateFragmentShaderWithBindings(bindings);
wgpu::BindGroupLayout layout = CreateBindGroupLayout(bindings, {0, 0});
wgpu::ComputePipeline computePipeline = CreateComputePipeline({layout}, computeShader);
wgpu::RenderPipeline renderPipeline = CreateRenderPipeline({layout}, vertexShader, fragShader);
CheckSizeBounds({8, 4}, [&](const std::vector<uint64_t>& sizes, bool expectation) {
wgpu::BindGroup bindGroup = CreateBindGroup(layout, bindings, sizes);
TestDispatch(computePipeline, {bindGroup}, expectation);
TestDraw(renderPipeline, {bindGroup}, expectation);
});
}
// Draw time validation works for non-contiguous bindings
TEST_F(MinBufferSizeDrawTimeValidationTests, UnorderedBindings) {
std::vector<BindingDescriptor> bindings = {
{0, 2, "a : f32; b : f32;", "f32", "a", 8},
{0, 0, "c : f32;", "f32", "c", 4},
{0, 4, "d : f32; e : f32; f : f32;", "f32", "e", 12}};
std::string computeShader = CreateComputeShaderWithBindings(bindings);
std::string vertexShader = CreateVertexShaderWithBindings({});
std::string fragShader = CreateFragmentShaderWithBindings(bindings);
wgpu::BindGroupLayout layout = CreateBindGroupLayout(bindings, {0, 0, 0});
wgpu::ComputePipeline computePipeline = CreateComputePipeline({layout}, computeShader);
wgpu::RenderPipeline renderPipeline = CreateRenderPipeline({layout}, vertexShader, fragShader);
CheckSizeBounds({8, 4, 12}, [&](const std::vector<uint64_t>& sizes, bool expectation) {
wgpu::BindGroup bindGroup = CreateBindGroup(layout, bindings, sizes);
TestDispatch(computePipeline, {bindGroup}, expectation);
TestDraw(renderPipeline, {bindGroup}, expectation);
});
}
// Draw time validation works for multiple bind groups
TEST_F(MinBufferSizeDrawTimeValidationTests, MultipleGroups) {
std::vector<BindingDescriptor> bg0Bindings = {{0, 0, "a : f32; b : f32;", "f32", "a", 8},
{0, 1, "c : f32;", "f32", "c", 4}};
std::vector<BindingDescriptor> bg1Bindings = {
{1, 0, "d : f32; e : f32; f : f32;", "f32", "e", 12},
{1, 1, "g : mat2x2<f32>;", "mat2x2<f32>", "g", 16}};
std::vector<BindingDescriptor> bindings = CombineBindings({bg0Bindings, bg1Bindings});
std::string computeShader = CreateComputeShaderWithBindings(bindings);
std::string vertexShader = CreateVertexShaderWithBindings({});
std::string fragShader = CreateFragmentShaderWithBindings(bindings);
wgpu::BindGroupLayout layout0 = CreateBindGroupLayout(bg0Bindings, {0, 0});
wgpu::BindGroupLayout layout1 = CreateBindGroupLayout(bg1Bindings, {0, 0});
wgpu::ComputePipeline computePipeline =
CreateComputePipeline({layout0, layout1}, computeShader);
wgpu::RenderPipeline renderPipeline =
CreateRenderPipeline({layout0, layout1}, vertexShader, fragShader);
CheckSizeBounds({8, 4, 12, 16}, [&](const std::vector<uint64_t>& sizes, bool expectation) {
wgpu::BindGroup bindGroup0 = CreateBindGroup(layout0, bg0Bindings, {sizes[0], sizes[1]});
wgpu::BindGroup bindGroup1 = CreateBindGroup(layout0, bg0Bindings, {sizes[2], sizes[3]});
TestDispatch(computePipeline, {bindGroup0, bindGroup1}, expectation);
TestDraw(renderPipeline, {bindGroup0, bindGroup1}, expectation);
});
}
// The correctness of minimum buffer size for the defaulted layout for a pipeline
class MinBufferSizeDefaultLayoutTests : public MinBufferSizeTestsBase {
public:
// Checks BGL |layout| has minimum buffer sizes equal to sizes in |bindings|
void CheckLayoutBindingSizeValidation(const wgpu::BindGroupLayout& layout,
const std::vector<BindingDescriptor>& bindings) {
std::vector<uint64_t> correctSizes;
correctSizes.reserve(bindings.size());
for (const BindingDescriptor& b : bindings) {
correctSizes.push_back(b.size);
}
CheckSizeBounds(correctSizes, [&](const std::vector<uint64_t>& sizes, bool expectation) {
if (expectation) {
CreateBindGroup(layout, bindings, sizes);
} else {
ASSERT_DEVICE_ERROR(CreateBindGroup(layout, bindings, sizes));
}
});
}
// Constructs shaders with given layout type and bindings, checking defaulted sizes match sizes
// in |bindings|
void CheckShaderBindingSizeReflection(
std::initializer_list<std::vector<BindingDescriptor>> bindings) {
std::vector<BindingDescriptor> combinedBindings = CombineBindings(bindings);
std::string computeShader = CreateComputeShaderWithBindings(combinedBindings);
std::string vertexShader = CreateVertexShaderWithBindings({});
std::string fragShader = CreateFragmentShaderWithBindings(combinedBindings);
size_t i = 0;
for (const std::vector<BindingDescriptor>& b : bindings) {
wgpu::BindGroupLayout computeLayout = GetBGLFromComputeShader(computeShader, i);
wgpu::BindGroupLayout renderLayout =
GetBGLFromRenderShaders(vertexShader, fragShader, i);
CheckLayoutBindingSizeValidation(computeLayout, b);
CheckLayoutBindingSizeValidation(renderLayout, b);
++i;
}
}
};
// Test the minimum size computations for various WGSL types.
TEST_F(MinBufferSizeDefaultLayoutTests, DefaultLayoutVariousWGSLTypes) {
CheckShaderBindingSizeReflection({{{0, 0, "a : f32;", "f32", "a", 4},
{0, 1, "b : array<f32>;", "f32", "b[0]", 4},
{0, 2, "c : mat2x2<f32>;", "mat2x2<f32>", "c", 16}}});
CheckShaderBindingSizeReflection({{{0, 3, "d : u32; e : array<f32>;", "u32", "d", 8},
{0, 4, "f : ThreeFloats;", "f32", "f.f1", 12},
{0, 5, "g : array<ThreeFloats>;", "f32", "g[0].f1", 12}}});
}
// Test the minimum size computations for various buffer binding types.
TEST_F(MinBufferSizeDefaultLayoutTests, DefaultLayoutVariousBindingTypes) {
CheckShaderBindingSizeReflection(
{{{0, 0, "a : f32;", "f32", "a", 4, wgpu::BufferBindingType::Uniform},
{0, 1, "a : f32; b : f32;", "f32", "a", 8, wgpu::BufferBindingType::Storage},
{0, 2, "a : f32; b : f32; c: f32;", "f32", "a", 12,
wgpu::BufferBindingType::ReadOnlyStorage}}});
}
// Test the minimum size computations works with multiple bind groups.
TEST_F(MinBufferSizeDefaultLayoutTests, MultipleBindGroups) {
CheckShaderBindingSizeReflection(
{{{0, 0, "a : f32;", "f32", "a", 4, wgpu::BufferBindingType::Uniform}},
{{1, 0, "a : f32; b : f32;", "f32", "a", 8, wgpu::BufferBindingType::Storage}},
{{2, 0, "a : f32; b : f32; c : f32;", "f32", "a", 12,
wgpu::BufferBindingType::ReadOnlyStorage}}});
}
// Test the minimum size computations with manual size/align/stride decorations.
TEST_F(MinBufferSizeDefaultLayoutTests, NonDefaultLayout) {
CheckShaderBindingSizeReflection(
{{{0, 0, "[[size(256)]] a : u32; b : u32;", "u32", "a", 260},
{0, 1, "c : u32; [[align(16)]] d : u32;", "u32", "c", 20},
{0, 2, "d : [[stride(40)]] array<u32, 3>;", "u32", "d[0]", 120},
{0, 3, "e : [[stride(40)]] array<u32>;", "u32", "e[0]", 40}}});
}
// Minimum size should be the max requirement of both vertex and fragment stages.
TEST_F(MinBufferSizeDefaultLayoutTests, RenderPassConsidersBothStages) {
// TODO(https://crbug.com/tint/716): Remove skip once this is resolved.
DAWN_SKIP_TEST_IF(HasToggleEnabled("use_tint_generator"));
std::string vertexShader = CreateVertexShaderWithBindings(
{{0, 0, "a : f32;", "f32", "a", 4, wgpu::BufferBindingType::Uniform},
{0, 1, "b : vec4<f32>;", "vec4<f32>", "b", 16, wgpu::BufferBindingType::Uniform}});
std::string fragShader = CreateFragmentShaderWithBindings(
{{0, 0, "a : f32; b : f32;", "f32", "a", 8, wgpu::BufferBindingType::Uniform},
{0, 1, "c : f32; d : f32;", "f32", "c", 8, wgpu::BufferBindingType::Uniform}});
wgpu::BindGroupLayout renderLayout = GetBGLFromRenderShaders(vertexShader, fragShader, 0);
CheckLayoutBindingSizeValidation(renderLayout, {{0, 0, "", "", "", 8}, {0, 1, "", "", "", 16}});
}