mirror of https://github.com/Xaymar/obs-StreamFX
56 lines
2.1 KiB
C++
56 lines
2.1 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 "gfx/gfx-util.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 streamfx::obs::gs {
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class mipmapper {
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std::unique_ptr<streamfx::obs::gs::rendertarget> _rt;
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streamfx::obs::gs::effect _effect;
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std::shared_ptr<streamfx::gfx::util> _gfx_util;
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public:
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~mipmapper();
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mipmapper();
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uint32_t calculate_max_mip_level(uint32_t width, uint32_t height);
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void rebuild(std::shared_ptr<streamfx::obs::gs::texture> source,
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std::shared_ptr<streamfx::obs::gs::texture> target);
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};
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} // namespace streamfx::obs::gs
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