mirror of https://github.com/Xaymar/obs-StreamFX
142 lines
3.6 KiB
C++
142 lines
3.6 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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#include "gs-effect.hpp"
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#include <fstream>
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#include <stdexcept>
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#include <vector>
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#include "obs/gs/gs-helper.hpp"
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#define MAX_EFFECT_SIZE 32 * 1024 * 1024
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static std::string load_file_as_code(std::filesystem::path file)
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{
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uintmax_t size = std::filesystem::file_size(file);
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if (size > MAX_EFFECT_SIZE) {
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throw std::runtime_error("File is too large to be loaded.");
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}
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std::ifstream ifs(file, std::ios::binary);
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if (!ifs.is_open() || ifs.bad()) {
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throw std::runtime_error("An unknown error occured trying to open the file.");
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}
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std::vector<char> buf(size_t(size + 1), 0);
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ifs.read(buf.data(), static_cast<std::streamsize>(size));
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return std::string(buf.data(), buf.data() + size);
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}
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gs::effect::effect(const std::string& code, const std::string& name)
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{
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auto gctx = gs::context();
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char* error_buffer = nullptr;
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gs_effect_t* effect = gs_effect_create(code.c_str(), name.c_str(), &error_buffer);
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if (!effect) {
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throw error_buffer ? std::runtime_error(error_buffer)
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: std::runtime_error("Unknown error during effect compile.");
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}
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reset(effect, [](gs_effect_t* ptr) { gs_effect_destroy(ptr); });
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}
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gs::effect::effect(std::filesystem::path file) : effect(load_file_as_code(file), file.string()) {}
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gs::effect::~effect()
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{
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auto gctx = gs::context();
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reset();
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}
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std::size_t gs::effect::count_techniques()
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{
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return static_cast<size_t>(get()->techniques.num);
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}
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gs::effect_technique gs::effect::get_technique(std::size_t idx)
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{
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if (idx >= count_techniques()) {
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return nullptr;
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}
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return gs::effect_technique(get()->techniques.array + idx, *this);
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}
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gs::effect_technique gs::effect::get_technique(const std::string& name)
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{
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for (std::size_t idx = 0; idx < count_techniques(); idx++) {
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auto ptr = get()->techniques.array + idx;
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if (strcmp(ptr->name, name.c_str()) == 0) {
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return gs::effect_technique(ptr, *this);
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}
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}
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return nullptr;
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}
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bool gs::effect::has_technique(const std::string& name)
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{
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if (get_technique(name))
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return true;
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return false;
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}
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std::size_t gs::effect::count_parameters()
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{
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return get()->params.num;
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}
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gs::effect_parameter gs::effect::get_parameter(std::size_t idx)
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{
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if (idx >= count_parameters()) {
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throw std::out_of_range("Index is out of range.");
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}
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return gs::effect_parameter(get()->params.array + idx, *this);
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}
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gs::effect_parameter gs::effect::get_parameter(const std::string& name)
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{
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for (std::size_t idx = 0; idx < count_parameters(); idx++) {
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auto ptr = get()->params.array + idx;
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if (strcmp(ptr->name, name.c_str()) == 0) {
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return gs::effect_parameter(ptr, *this);
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}
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}
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return nullptr;
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}
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bool gs::effect::has_parameter(const std::string& name)
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{
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if (get_parameter(name))
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return true;
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return false;
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}
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bool gs::effect::has_parameter(const std::string& name, effect_parameter::type type)
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{
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auto eprm = get_parameter(name);
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if (eprm)
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return eprm.get_type() == type;
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return false;
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}
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