chromium/third_party/dawn/src/dawn/native/utils/WGPUHelpers.h

// Copyright 2017 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,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef SRC_DAWN_NATIVE_UTILS_WGPUHELPERS_H_
#define SRC_DAWN_NATIVE_UTILS_WGPUHELPERS_H_

#include <array>
#include <initializer_list>
#include <vector>

#include "dawn/common/Ref.h"
#include "dawn/native/Error.h"
#include "dawn/native/UsageValidationMode.h"
#include "dawn/native/dawn_platform.h"

namespace tint::wgsl {
enum class Extension : uint8_t;
}

namespace dawn::native::utils {

ResultOrError<Ref<ShaderModuleBase>> CreateShaderModule(
    DeviceBase* device,
    const char* source,
    const std::vector<tint::wgsl::Extension>& internalExtensions = {};

ResultOrError<Ref<BufferBase>> CreateBufferFromData(DeviceBase* device,
                                                    wgpu::BufferUsage usage,
                                                    const void* data,
                                                    uint64_t size);

template <typename T>
ResultOrError<Ref<BufferBase>> CreateBufferFromData(DeviceBase* device,
                                                    wgpu::BufferUsage usage,
                                                    std::initializer_list<T> data) {}

ResultOrError<Ref<PipelineLayoutBase>> MakeBasicPipelineLayout(
    DeviceBase* device,
    const Ref<BindGroupLayoutBase>& bindGroupLayout);

// Helpers to make creating bind group layouts look nicer:
//
//   utils::MakeBindGroupLayout(device, {
//       {0, wgpu::ShaderStage::Vertex, wgpu::BufferBindingType::Uniform},
//       {1, wgpu::ShaderStage::Fragment, wgpu::SamplerBindingType::Filtering},
//       {3, wgpu::ShaderStage::Fragment, wgpu::TextureSampleType::Float}
//   });

struct BindingLayoutEntryInitializationHelper : BindGroupLayoutEntry {};

ResultOrError<Ref<BindGroupLayoutBase>> MakeBindGroupLayout(
    DeviceBase* device,
    std::initializer_list<BindingLayoutEntryInitializationHelper> entriesInitializer,
    bool allowInternalBinding = false);

// Helpers to make creating bind groups look nicer:
//
//   utils::MakeBindGroup(device, layout, {
//       {0, mySampler},
//       {1, myBuffer, offset, size},
//       {3, myTextureView}
//   });

// Structure with one constructor per-type of bindings, so that the initializer_list accepts
// bindings with the right type and no extra information.
struct BindingInitializationHelper {};

// This helper is only used inside dawn native.
ResultOrError<Ref<BindGroupBase>> MakeBindGroup(
    DeviceBase* device,
    const Ref<BindGroupLayoutBase>& layout,
    std::initializer_list<BindingInitializationHelper> entriesInitializer,
    UsageValidationMode mode);

const char* GetLabelForTrace(const char* label);

// Given a std vector, allocate an equivalent array that can be returned in an API's foos/fooCount
// pair of fields. The apiData must eventually be freed using FreeApiSeq.
template <typename T>
void AllocateApiSeqFromStdVector(const T** apiData, size_t* apiSize, const std::vector<T>& vector) {}

// Free an API sequence that was allocated by AllocateApiSeqFromStdVector
template <typename T>
void FreeApiSeq(T** apiData, size_t* apiSize) {}

// Normalize the label, truncating it at the first null-terminator, if any.
std::string_view NormalizeLabel(std::string_view in);
std::string_view NormalizeLabel(std::optional<std::string_view> in);

}  // namespace dawn::native::utils

#endif  // SRC_DAWN_NATIVE_UTILS_WGPUHELPERS_H_