src/dawn/native/ScratchBuffer.cpp

// Copyright 2021 The Dawn & Tint Authors
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#include "dawn/native/ScratchBuffer.h"

#include "dawn/native/Device.h"

namespace dawn::native {

ScratchBuffer::ScratchBuffer(DeviceBase* device, wgpu::BufferUsage usage)
    : mDevice(device), mUsage(usage) {}

ScratchBuffer::~ScratchBuffer() = default;

void ScratchBuffer::Reset() {
    mBuffer = nullptr;
}

MaybeError ScratchBuffer::EnsureCapacity(uint64_t capacity) {
    DAWN_ASSERT(capacity > 0);
    if (!mBuffer.Get() || mBuffer->GetSize() < capacity) {
        BufferDescriptor descriptor;
        descriptor.size = capacity;
        descriptor.usage = mUsage;
        DAWN_TRY_ASSIGN(mBuffer, mDevice->CreateBuffer(&descriptor));
        mBuffer->SetInitialized(true);
    }
    return {};
}

BufferBase* ScratchBuffer::GetBuffer() const {
    DAWN_ASSERT(mBuffer.Get() != nullptr);
    return mBuffer.Get();
}

}  // namespace dawn::native