obs-StreamFX/source/gfx/gfx-source-texture.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 "gfx-source-texture.hpp"
#include <stdexcept>
#include "obs/gs/gs-helper.hpp"
#include "obs/obs-tools.hpp"
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streamfx::gfx::source_texture::~source_texture()
{
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if (_child && _parent) {
obs_source_remove_active_child(_parent.get(), _child.get());
}
}
streamfx::gfx::source_texture::source_texture(streamfx::obs::weak_source child, streamfx::obs::weak_source parent)
: _child(child.lock()), _parent(parent.lock())
{
// Verify that 'child' and 'parent' exist.
if (!_child || !_parent) {
throw std::invalid_argument("Child or Parent does not exist.");
}
// Verify that 'child' does not contain 'parent'.
if (::streamfx::obs::tools::source_find_source(_child, _parent)) {
throw std::runtime_error("Child contains Parent");
} else if (!obs_source_add_active_child(_parent.get(), _child.get())) {
throw std::runtime_error("Child contains Parent");
}
_rt = std::make_shared<streamfx::obs::gs::rendertarget>(GS_RGBA, GS_ZS_NONE);
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}
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obs_source_t* streamfx::gfx::source_texture::get_object()
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{
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if (_child) {
return _child.get();
}
return nullptr;
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}
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obs_source_t* streamfx::gfx::source_texture::get_parent()
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{
return _parent.get();
}
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void streamfx::gfx::source_texture::clear()
{
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if (_child && _parent) {
obs_source_remove_active_child(_parent.get(), _child.get());
}
_child = {};
}
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std::shared_ptr<streamfx::obs::gs::texture> streamfx::gfx::source_texture::render(std::size_t width, std::size_t height)
{
if ((width == 0) || (width >= 16384)) {
throw std::runtime_error("Width too large or too small.");
}
if ((height == 0) || (height >= 16384)) {
throw std::runtime_error("Height too large or too small.");
}
if (!_child || !_parent) {
return nullptr;
}
if (_child) {
#ifdef ENABLE_PROFILING
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auto cctr = streamfx::obs::gs::debug_marker(streamfx::obs::gs::debug_color_capture, "gfx::source_texture '%s'",
obs_source_get_name(_child.get()));
#endif
auto op = _rt->render(static_cast<uint32_t>(width), static_cast<uint32_t>(height));
vec4 black;
vec4_zero(&black);
gs_ortho(0, static_cast<float>(width), 0, static_cast<float_t>(height), 0, 1);
gs_clear(GS_CLEAR_COLOR, &black, 0, 0);
obs_source_video_render(_child.get());
}
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std::shared_ptr<streamfx::obs::gs::texture> tex;
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_rt->get_texture(tex);
return tex;
}