obs-StreamFX/source/filters/filter-shader.cpp
2021-06-08 05:44:22 +02:00

217 lines
5.7 KiB
C++

/*
* 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 "filter-shader.hpp"
#include "strings.hpp"
#include <stdexcept>
#include "obs/gs/gs-helper.hpp"
#define ST_I18N "Filter.Shader"
using namespace streamfx::filter::shader;
static constexpr std::string_view HELP_URL =
"https://github.com/Xaymar/obs-StreamFX/wiki/Source-Filter-Transition-Shader";
shader_instance::shader_instance(obs_data_t* data, obs_source_t* self) : obs::source_instance(data, self)
{
_fx = std::make_shared<streamfx::gfx::shader::shader>(self, streamfx::gfx::shader::shader_mode::Filter);
_rt = std::make_shared<streamfx::obs::gs::rendertarget>(GS_RGBA, GS_ZS_NONE);
update(data);
}
shader_instance::~shader_instance() {}
uint32_t shader_instance::get_width()
{
return _fx->width();
}
uint32_t shader_instance::get_height()
{
return _fx->height();
}
void shader_instance::properties(obs_properties_t* props)
{
_fx->properties(props);
}
void shader_instance::load(obs_data_t* data)
{
update(data);
}
void shader_instance::migrate(obs_data_t* data, uint64_t version) {}
void shader_instance::update(obs_data_t* data)
{
_fx->update(data);
}
void shader_instance::video_tick(float_t sec_since_last)
{
if (_fx->tick(sec_since_last)) {
obs_data_t* data = obs_source_get_settings(_self);
_fx->update(data);
obs_data_release(data);
}
if (obs_source_t* tgt = obs_filter_get_target(_self); tgt != nullptr) {
_fx->set_size(obs_source_get_base_width(tgt), obs_source_get_base_height(tgt));
} else if (obs_source* src = obs_filter_get_parent(_self); src != nullptr) {
_fx->set_size(obs_source_get_base_width(src), obs_source_get_base_height(src));
}
}
void shader_instance::video_render(gs_effect_t* effect)
{
try {
if (!_fx || !_fx->base_width() || !_fx->base_height()) {
throw std::runtime_error("No effect, or invalid base size.");
}
#ifdef ENABLE_PROFILING
streamfx::obs::gs::debug_marker gdmp{streamfx::obs::gs::debug_color_source, "Shader Filter '%s' on '%s'",
obs_source_get_name(_self),
obs_source_get_name(obs_filter_get_parent(_self))};
#endif
{
#ifdef ENABLE_PROFILING
streamfx::obs::gs::debug_marker gdm{streamfx::obs::gs::debug_color_source, "Cache"};
#endif
auto op = _rt->render(_fx->base_width(), _fx->base_height());
gs_ortho(0, 1, 0, 1, -1, 1);
/// Render original source
if (obs_source_process_filter_begin(_self, GS_RGBA, OBS_NO_DIRECT_RENDERING)) {
gs_blend_state_push();
gs_reset_blend_state();
gs_blend_function_separate(GS_BLEND_ONE, GS_BLEND_ZERO, GS_BLEND_SRCALPHA, GS_BLEND_ZERO);
gs_enable_blending(false);
gs_enable_depth_test(false);
gs_enable_stencil_test(false);
gs_enable_stencil_write(false);
gs_enable_color(true, true, true, true);
gs_set_cull_mode(GS_NEITHER);
obs_source_process_filter_end(_self, obs_get_base_effect(OBS_EFFECT_DEFAULT), 1, 1);
gs_blend_state_pop();
} else {
throw std::runtime_error("Failed to render previous source.");
}
}
{
#ifdef ENABLE_PROFILING
streamfx::obs::gs::debug_marker gdm{streamfx::obs::gs::debug_color_render, "Render"};
#endif
_fx->prepare_render();
_fx->set_input_a(_rt->get_texture());
_fx->render(effect);
}
} catch (const std::exception& ex) {
obs_source_skip_video_filter(_self);
throw ex;
}
}
void streamfx::filter::shader::shader_instance::activate()
{
_fx->set_active(true);
}
void streamfx::filter::shader::shader_instance::deactivate()
{
_fx->set_active(false);
}
shader_factory::shader_factory()
{
_info.id = S_PREFIX "filter-shader";
_info.type = OBS_SOURCE_TYPE_FILTER;
_info.output_flags = OBS_SOURCE_VIDEO;
set_activity_tracking_enabled(true);
finish_setup();
register_proxy("obs-stream-effects-filter-shader");
}
shader_factory::~shader_factory() {}
const char* shader_factory::get_name()
{
return D_TRANSLATE(ST_I18N);
}
void shader_factory::get_defaults2(obs_data_t* data)
{
streamfx::gfx::shader::shader::defaults(data);
}
obs_properties_t* shader_factory::get_properties2(shader::shader_instance* data)
{
auto pr = obs_properties_create();
obs_properties_set_param(pr, data, nullptr);
#ifdef ENABLE_FRONTEND
{
auto p = obs_properties_add_button2(pr, S_MANUAL_OPEN, D_TRANSLATE(S_MANUAL_OPEN),
streamfx::filter::shader::shader_factory::on_manual_open, nullptr);
}
#endif
if (data) {
reinterpret_cast<shader_instance*>(data)->properties(pr);
}
return pr;
}
#ifdef ENABLE_FRONTEND
bool shader_factory::on_manual_open(obs_properties_t* props, obs_property_t* property, void* data)
{
streamfx::open_url(HELP_URL);
return false;
}
#endif
std::shared_ptr<shader_factory> _filter_shader_factory_instance = nullptr;
void streamfx::filter::shader::shader_factory::initialize()
{
if (!_filter_shader_factory_instance)
_filter_shader_factory_instance = std::make_shared<shader_factory>();
}
void streamfx::filter::shader::shader_factory::finalize()
{
_filter_shader_factory_instance.reset();
}
std::shared_ptr<shader_factory> streamfx::filter::shader::shader_factory::get()
{
return _filter_shader_factory_instance;
}