mirror of
https://github.com/Xaymar/obs-StreamFX
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4947d46aa1
The new libOBS API allows us to directly access the underlying API instead of having to mess around in memory. By using it we can avoid crashing in case the compiler for it is different, or in case the actual back end structure changes. Additionally the mostly unimplemented and unused options have also been removed, which streamlines the use of this class even further and reduces both shader and code complexity. Finally by optimizing the use of the internal render target we can achieve a speed up of up to 3000% over the old way, allowing for many more mipmapped filters.
51 lines
1.9 KiB
C++
51 lines
1.9 KiB
C++
/*
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* Modern effects for a modern Streamer
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* Copyright (C) 2017 Michael Fabian Dirks
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*
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* This program 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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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#pragma once
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#include "common.hpp"
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#include "gs-effect.hpp"
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#include "gs-rendertarget.hpp"
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#include "gs-texture.hpp"
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#include "gs-vertexbuffer.hpp"
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/* gs::mipmapper is an attempt at adding dynamic mip-map generation to a software
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* which only supports static mip-maps. It is effectively an incredibly bad hack
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* instead of a proper solution - can break any time and likely already has.
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*
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* Needless to say, dynamic mip-map generation costs a lot of GPU time, especially
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* when things need to be synchronized. In the ideal case we would just render
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* straight to the mip level, but this is not possible in DirectX 11 and OpenGL.
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*
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* So instead we render to a render target and copy from there to the actual
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* resource. Super wasteful, but what else can we actually do?
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*/
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namespace gs {
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class mipmapper {
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std::unique_ptr<gs::vertex_buffer> _vb;
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std::unique_ptr<gs::rendertarget> _rt;
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gs::effect _effect;
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public:
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~mipmapper();
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mipmapper();
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void rebuild(std::shared_ptr<gs::texture> source, std::shared_ptr<gs::texture> target);
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};
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} // namespace gs
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