128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
/*
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Copyright 2021 flyinghead
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This file is part of Flycast.
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Flycast is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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Flycast is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Flycast. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "../dx11context.h"
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class Buffers
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{
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public:
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void init(ComPtr<ID3D11Device> device, ComPtr<ID3D11DeviceContext> deviceContext)
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{
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this->device = device;
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this->deviceContext = deviceContext;
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pixelsBufferView.reset();
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pixelsBuffer.reset();
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D3D11_BUFFER_DESC desc{};
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desc.ByteWidth = (UINT)std::min<u64>(config::PixelBufferSize, UINT_MAX);
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desc.Usage = D3D11_USAGE_DEFAULT;
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desc.BindFlags = D3D11_BIND_UNORDERED_ACCESS;
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desc.MiscFlags = D3D11_RESOURCE_MISC_BUFFER_STRUCTURED;
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desc.StructureByteStride = 16; // sizeof(struct Pixel)
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HRESULT hr = device->CreateBuffer(&desc, nullptr, &pixelsBuffer.get());
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if (FAILED(hr))
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{
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if (desc.ByteWidth > D3D11_REQ_RESOURCE_SIZE_IN_MEGABYTES_EXPRESSION_C_TERM * 1024u * 1024u)
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{
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desc.ByteWidth = D3D11_REQ_RESOURCE_SIZE_IN_MEGABYTES_EXPRESSION_C_TERM * 1024u * 1024u;
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hr = device->CreateBuffer(&desc, nullptr, &pixelsBuffer.get());
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}
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if (FAILED(hr))
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{
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WARN_LOG(RENDERER, "Pixels buffer creation failed");
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return;
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}
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}
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D3D11_UNORDERED_ACCESS_VIEW_DESC uaView{};
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uaView.Format = DXGI_FORMAT_UNKNOWN;
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uaView.ViewDimension = D3D11_UAV_DIMENSION_BUFFER;
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uaView.Buffer.FirstElement = 0;
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uaView.Buffer.Flags = D3D11_BUFFER_UAV_FLAG_COUNTER;
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uaView.Buffer.NumElements = desc.ByteWidth / desc.StructureByteStride;
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hr = device->CreateUnorderedAccessView(pixelsBuffer, &uaView, &pixelsBufferView.get());
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if (FAILED(hr))
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WARN_LOG(RENDERER, "Pixels buffer UAV creation failed");
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}
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void resize(int width, int height)
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{
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if (this->width >= width && this->height >= height)
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return;
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this->width = std::max(this->width, width);
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this->height = std::max(this->height, height);
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abufferPointersView.reset();
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abufferPointersTex.reset();
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D3D11_TEXTURE2D_DESC desc{};
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desc.Width = this->width;
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desc.Height = this->height;
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desc.ArraySize = 1;
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desc.SampleDesc.Count = 1;
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desc.Usage = D3D11_USAGE_DEFAULT;
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desc.BindFlags = D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS;
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desc.Format = DXGI_FORMAT_R32_UINT;
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desc.MipLevels = 1;
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HRESULT hr = device->CreateTexture2D(&desc, nullptr, &abufferPointersTex.get());
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if (FAILED(hr))
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{
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WARN_LOG(RENDERER, "A-buffer texture creation failed");
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return;
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}
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D3D11_UNORDERED_ACCESS_VIEW_DESC uaView{};
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uaView.Format = DXGI_FORMAT_UNKNOWN;
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uaView.ViewDimension = D3D11_UAV_DIMENSION_TEXTURE2D;
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hr = device->CreateUnorderedAccessView(abufferPointersTex, &uaView, &abufferPointersView.get());
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if (FAILED(hr))
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WARN_LOG(RENDERER, "A-buffer texture UAV creation failed");
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}
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void bind()
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{
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ID3D11UnorderedAccessView *uavs[] { pixelsBufferView, abufferPointersView };
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UINT initialCounts[] { 0, (UINT)-1 };
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deviceContext->OMSetRenderTargetsAndUnorderedAccessViews(D3D11_KEEP_RENDER_TARGETS_AND_DEPTH_STENCIL, nullptr, nullptr, 1, ARRAY_SIZE(uavs), uavs, initialCounts);
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}
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void term()
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{
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width = 0;
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height = 0;
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abufferPointersView.reset();
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abufferPointersTex.reset();
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pixelsBufferView.reset();
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pixelsBuffer.reset();
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deviceContext.reset();
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device.reset();
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}
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private:
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int width = 0;
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int height = 0;
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ComPtr<ID3D11Device> device;
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ComPtr<ID3D11DeviceContext> deviceContext;
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ComPtr<ID3D11Texture2D> abufferPointersTex;
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ComPtr<ID3D11UnorderedAccessView> abufferPointersView;
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ComPtr<ID3D11Buffer> pixelsBuffer;
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ComPtr<ID3D11UnorderedAccessView> pixelsBufferView;
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};
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