obs-StreamFX/source/obs/gs/gs-rendertarget.cpp

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/*
* Modern effects for a modern Streamer
* Copyright (C) 2017 Michael Fabian Dirks
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "gs-rendertarget.hpp"
#include <stdexcept>
#include "obs/gs/gs-helper.hpp"
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streamfx::obs::gs::rendertarget::~rendertarget()
{
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auto gctx = streamfx::obs::gs::context();
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gs_texrender_destroy(_render_target);
}
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streamfx::obs::gs::rendertarget::rendertarget(gs_color_format colorFormat, gs_zstencil_format zsFormat)
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: _color_format(colorFormat), _zstencil_format(zsFormat)
{
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_is_being_rendered = false;
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auto gctx = streamfx::obs::gs::context();
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_render_target = gs_texrender_create(colorFormat, zsFormat);
if (!_render_target) {
throw std::runtime_error("Failed to create render target.");
}
}
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streamfx::obs::gs::rendertarget_op streamfx::obs::gs::rendertarget::render(uint32_t width, uint32_t height)
{
return {this, width, height};
}
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gs_texture_t* streamfx::obs::gs::rendertarget::get_object()
{
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auto gctx = streamfx::obs::gs::context();
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gs_texture_t* tex = gs_texrender_get_texture(_render_target);
return tex;
}
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std::shared_ptr<streamfx::obs::gs::texture> streamfx::obs::gs::rendertarget::get_texture()
{
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return std::make_shared<streamfx::obs::gs::texture>(get_object(), false);
}
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void streamfx::obs::gs::rendertarget::get_texture(streamfx::obs::gs::texture& tex)
{
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tex = streamfx::obs::gs::texture(get_object(), false);
}
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void streamfx::obs::gs::rendertarget::get_texture(std::shared_ptr<streamfx::obs::gs::texture>& tex)
{
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tex = std::make_shared<streamfx::obs::gs::texture>(get_object(), false);
}
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void streamfx::obs::gs::rendertarget::get_texture(std::unique_ptr<streamfx::obs::gs::texture>& tex)
{
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tex = std::make_unique<streamfx::obs::gs::texture>(get_object(), false);
}
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gs_color_format streamfx::obs::gs::rendertarget::get_color_format()
{
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return _color_format;
}
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gs_zstencil_format streamfx::obs::gs::rendertarget::get_zstencil_format()
{
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return _zstencil_format;
}
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streamfx::obs::gs::rendertarget_op::rendertarget_op(streamfx::obs::gs::rendertarget* rt, uint32_t width,
uint32_t height)
: parent(rt)
{
if (parent == nullptr)
throw std::invalid_argument("rt");
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if (parent->_is_being_rendered)
throw std::logic_error("Can't start rendering to the same render target twice.");
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auto gctx = streamfx::obs::gs::context();
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gs_texrender_reset(parent->_render_target);
if (!gs_texrender_begin(parent->_render_target, width, height)) {
throw std::runtime_error("Failed to begin rendering to render target.");
}
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parent->_is_being_rendered = true;
}
streamfx::obs::gs::rendertarget_op::rendertarget_op(streamfx::obs::gs::rendertarget_op&& r) noexcept
{
this->parent = r.parent;
r.parent = nullptr;
}
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streamfx::obs::gs::rendertarget_op::~rendertarget_op()
{
if (parent == nullptr)
return;
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auto gctx = streamfx::obs::gs::context();
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gs_texrender_end(parent->_render_target);
parent->_is_being_rendered = false;
}