369 lines
10 KiB
C++
369 lines
10 KiB
C++
// 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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#include "gfx-shader.hpp"
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#include <algorithm>
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#include <cstdio>
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#include <cstring>
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#include "plugin.hpp"
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#define ST "Shader"
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#define ST_SHADER ST ".Shader"
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#define ST_SHADER_FILE ST_SHADER ".File"
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#define ST_SHADER_TECHNIQUE ST_SHADER ".Technique"
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#define ST_SHADER_SIZE ST_SHADER ".Size"
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#define ST_SHADER_SIZE_WIDTH ST_SHADER_SIZE ".Width"
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#define ST_SHADER_SIZE_HEIGHT ST_SHADER_SIZE ".Height"
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#define ST_PARAMETERS ST ".Parameters"
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gfx::shader::shader::shader(obs_source_t* self, shader_mode mode)
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: _self(self), _mode(mode), _shader(), _shader_file(), _time()
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{
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_random.seed(static_cast<unsigned long long>(time(NULL)));
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}
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gfx::shader::shader::~shader() {}
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void gfx::shader::shader::load_shader(std::filesystem::path file)
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{
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_shader = gs::effect(file);
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_shader_file = file;
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}
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void gfx::shader::shader::load_shader_params()
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{
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_shader_params.clear();
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if (gs::effect_technique tech = _shader.get_technique(_shader_tech); tech != nullptr) {
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for (size_t idx = 0; idx < tech.count_passes(); idx++) {
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auto pass = tech.get_pass(idx);
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for (size_t vidx = 0; vidx < pass.count_vertex_parameters(); vidx++) {
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auto el = pass.get_vertex_parameter(vidx);
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auto fnd = _shader_params.find(el.get_name());
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if (fnd != _shader_params.end())
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continue;
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auto param = gfx::shader::parameter::make_parameter(el, ST_PARAMETERS);
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if (param)
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_shader_params.insert_or_assign(el.get_name(), param);
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}
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for (size_t vidx = 0; vidx < pass.count_pixel_parameters(); vidx++) {
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auto el = pass.get_pixel_parameter(vidx);
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auto fnd = _shader_params.find(el.get_name());
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if (fnd != _shader_params.end())
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continue;
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auto param = gfx::shader::parameter::make_parameter(el, ST_PARAMETERS);
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if (param)
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_shader_params.insert_or_assign(el.get_name(), param);
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}
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}
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}
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}
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void gfx::shader::shader::properties(obs_properties_t* pr)
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{
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{
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auto grp = obs_properties_create();
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obs_properties_add_group(pr, ST_SHADER, D_TRANSLATE(ST_SHADER), OBS_GROUP_NORMAL, grp);
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{
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auto p = obs_properties_add_path(grp, ST_SHADER_FILE, D_TRANSLATE(ST_SHADER_FILE), OBS_PATH_FILE, "*.*",
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nullptr);
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obs_property_set_long_description(p, D_TRANSLATE(D_DESC(ST_SHADER_FILE)));
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obs_property_set_modified_callback2(
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p,
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[](void* priv, obs_properties_t* props, obs_property_t* prop, obs_data_t* data) noexcept {
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return reinterpret_cast<gfx::shader::shader*>(priv)->on_shader_changed(props, prop, data);
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},
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this);
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}
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{
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auto p = obs_properties_add_list(grp, ST_SHADER_TECHNIQUE, D_TRANSLATE(ST_SHADER_TECHNIQUE),
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OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
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obs_property_set_long_description(p, D_TRANSLATE(D_DESC(ST_SHADER_TECHNIQUE)));
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obs_property_set_modified_callback2(
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p,
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[](void* priv, obs_properties_t* props, obs_property_t* prop, obs_data_t* data) noexcept {
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return reinterpret_cast<gfx::shader::shader*>(priv)->on_technique_changed(props, prop, data);
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},
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this);
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}
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if (_mode != shader_mode::Transition) {
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auto grp2 = obs_properties_create();
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obs_properties_add_group(grp, ST_SHADER_SIZE, D_TRANSLATE(ST_SHADER_SIZE), OBS_GROUP_NORMAL, grp2);
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{
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auto p = obs_properties_add_text(grp2, ST_SHADER_SIZE_WIDTH, D_TRANSLATE(ST_SHADER_SIZE_WIDTH),
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OBS_TEXT_DEFAULT);
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obs_property_set_long_description(p, D_TRANSLATE(D_DESC(ST_SHADER_SIZE_WIDTH)));
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}
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{
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auto p = obs_properties_add_text(grp2, ST_SHADER_SIZE_HEIGHT, D_TRANSLATE(ST_SHADER_SIZE_HEIGHT),
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OBS_TEXT_DEFAULT);
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obs_property_set_long_description(p, D_TRANSLATE(D_DESC(ST_SHADER_SIZE_HEIGHT)));
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}
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}
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}
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{
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auto grp = obs_properties_create();
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obs_properties_add_group(pr, ST_PARAMETERS, D_TRANSLATE(ST_PARAMETERS), OBS_GROUP_NORMAL, grp);
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}
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}
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bool gfx::shader::shader::on_shader_changed(obs_properties_t* props, obs_property_t* prop, obs_data_t* data)
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{
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// Load changed shader.
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update_shader(data);
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// Clear list of techniques.
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obs_property_t* list = obs_properties_get(props, ST_SHADER_TECHNIQUE);
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obs_property_list_clear(list);
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// Don't go further if there is no shader.
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if (!_shader)
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return true;
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// Rebuild Technique list.
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{
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const char* tech_name_c = obs_data_get_string(data, ST_SHADER_TECHNIQUE);
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std::string tech_name = tech_name_c ? tech_name_c : "";
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bool have_tech = false;
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for (size_t idx = 0, idx_end = _shader.count_techniques(); idx < idx_end; idx++) {
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auto tech = _shader.get_technique(idx);
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obs_property_list_add_string(list, tech.name().c_str(), tech.name().c_str());
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if (tech.name() == tech_name) {
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have_tech = true;
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}
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}
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if (!have_tech && (_shader.count_techniques() > 0)) {
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obs_data_set_string(data, ST_SHADER_TECHNIQUE, _shader.get_technique(0).name().c_str());
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//on_technique_changed(props, prop, data);
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} else {
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obs_data_set_string(data, ST_SHADER_TECHNIQUE, "");
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}
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}
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return true;
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}
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bool gfx::shader::shader::on_technique_changed(obs_properties_t* props, obs_property_t* prop, obs_data_t* data)
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{
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// Clear parameter options.
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auto grp = obs_property_group_content(obs_properties_get(props, ST_PARAMETERS));
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if (auto p = obs_properties_first(grp); p != nullptr) {
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do {
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obs_properties_remove_by_name(grp, obs_property_name(p));
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p = obs_properties_first(grp);
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} while (p != nullptr);
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}
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// Don't go further if there is no shader.
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if (!_shader)
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return true;
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// Load technique.
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update_technique(data);
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// Rebuild new parameters.
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for (auto kv : _shader_params) {
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kv.second->properties(grp, data);
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}
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return true;
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}
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void gfx::shader::shader::update_shader(obs_data_t* data)
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{
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{
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const char* file_c = obs_data_get_string(data, ST_SHADER_FILE);
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std::string file = file_c ? file_c : "";
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if (file != "") {
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try {
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load_shader(file);
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} catch (const std::exception& ex) {
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P_LOG_ERROR("Failed to load shader: %s.", ex.what());
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_shader.reset();
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} catch (...) {
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P_LOG_ERROR("Failed to load shader.");
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_shader.reset();
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}
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} else {
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_shader.reset();
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}
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}
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}
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void gfx::shader::shader::update_technique(obs_data_t* data)
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{
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{
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const char* shader_tech_c = obs_data_get_string(data, ST_SHADER_TECHNIQUE);
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_shader_tech = shader_tech_c ? shader_tech_c : "";
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load_shader_params();
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}
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}
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inline std::pair<gfx::shader::size_type, double_t> parse_text_as_size(const char* text)
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{
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double_t v = 0;
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if (sscanf(text, "%lf", &v) == 1) {
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const char* prc_chr = strrchr(text, '%');
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if (prc_chr && (*prc_chr == '%')) {
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return {gfx::shader::size_type::Percent, v / 100.0};
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} else {
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return {gfx::shader::size_type::Pixel, v};
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}
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} else {
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return {gfx::shader::size_type::Percent, 1.0};
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}
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}
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void gfx::shader::shader::update(obs_data_t* data)
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{
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update_shader(data);
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update_technique(data);
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{
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auto sz_x = parse_text_as_size(obs_data_get_string(data, ST_SHADER_SIZE_WIDTH));
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_width_type = sz_x.first;
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_width_value = std::clamp(sz_x.second, 0.01, 8192.0);
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auto sz_y = parse_text_as_size(obs_data_get_string(data, ST_SHADER_SIZE_HEIGHT));
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_height_type = sz_y.first;
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_height_value = std::clamp(sz_y.second, 0.01, 8192.0);
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}
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for (auto kv : _shader_params) {
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kv.second->update(data);
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}
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}
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uint32_t gfx::shader::shader::width()
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{
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switch (_mode) {
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case shader_mode::Transition:
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return _base_width;
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case shader_mode::Source:
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switch (_width_type) {
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case size_type::Pixel:
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return std::clamp(static_cast<uint32_t>(_width_value), 1u, 8192u);
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case size_type::Percent:
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return std::clamp(static_cast<uint32_t>(_width_value * _base_width), 1u, 8192u);
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}
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case shader_mode::Filter:
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switch (_width_type) {
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case size_type::Pixel:
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return std::clamp(static_cast<uint32_t>(_width_value), 1u, 8192u);
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case size_type::Percent:
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if (_input_a) {
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return std::clamp(static_cast<uint32_t>(_width_value * _input_a->get_width()), 1u, 8192u);
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} else {
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return std::clamp(static_cast<uint32_t>(_width_value * _base_width), 1u, 8192u);
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}
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}
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default:
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return 0;
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}
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}
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uint32_t gfx::shader::shader::height()
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{
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switch (_mode) {
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case shader_mode::Transition:
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return _base_height;
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case shader_mode::Source:
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switch (_height_type) {
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case size_type::Pixel:
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return std::clamp(static_cast<uint32_t>(_height_value), 1u, 8192u);
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case size_type::Percent:
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return std::clamp(static_cast<uint32_t>(_height_value * _base_height), 1u, 8192u);
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}
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case shader_mode::Filter:
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switch (_height_type) {
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case size_type::Pixel:
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return std::clamp(static_cast<uint32_t>(_height_value), 1u, 8192u);
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case size_type::Percent:
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if (_input_a) {
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return std::clamp(static_cast<uint32_t>(_height_value * _input_a->get_height()), 1u, 8192u);
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} else {
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return std::clamp(static_cast<uint32_t>(_height_value * _base_height), 1u, 8192u);
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}
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}
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default:
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return 0;
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}
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}
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bool gfx::shader::shader::tick(float_t time)
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{
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// Update State
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_time += time;
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// Update Shader
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if (_shader) {
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if (gs::effect_parameter el = _shader.get_parameter("Time"); el != nullptr) {
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if (el.get_type() == gs::effect_parameter::type::Float4) {
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el.set_float4(
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_time, time, 0,
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static_cast<float_t>(static_cast<double_t>(_random())
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/ static_cast<double_t>(std::numeric_limits<unsigned long long>::max())));
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}
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}
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for (auto kv : _shader_params) {
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kv.second->assign();
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}
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}
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return false;
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}
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void gfx::shader::shader::render()
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{
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if (!_shader)
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return;
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uint32_t szw = width();
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uint32_t szh = height();
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while (gs_effect_loop(_shader.get_object(), _shader_tech.c_str())) {
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gs_draw_sprite(nullptr, 0, szw, szh);
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}
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}
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void gfx::shader::shader::set_size(uint32_t w, uint32_t h)
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{
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_base_width = w;
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_base_height = h;
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}
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void gfx::shader::shader::set_input_a(std::shared_ptr<gs::texture> tex)
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{
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_input_a = tex;
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}
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void gfx::shader::shader::set_input_b(std::shared_ptr<gs::texture> tex)
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{
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_input_b = tex;
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}
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