mirror of
https://github.com/Xaymar/obs-StreamFX
synced 2024-12-03 00:27:26 +00:00
141 lines
3.6 KiB
C++
141 lines
3.6 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 "gs-effect.hpp"
|
|
#include <fstream>
|
|
#include <stdexcept>
|
|
#include <vector>
|
|
#include "obs/gs/gs-helper.hpp"
|
|
|
|
#define MAX_EFFECT_SIZE 32 * 1024 * 1024
|
|
|
|
static std::string load_file_as_code(std::filesystem::path file)
|
|
{
|
|
uintmax_t size = std::filesystem::file_size(file);
|
|
if (size > MAX_EFFECT_SIZE) {
|
|
throw std::runtime_error("File is too large to be loaded.");
|
|
}
|
|
|
|
std::ifstream ifs(file, std::ios::binary);
|
|
if (!ifs.is_open() || ifs.bad()) {
|
|
throw std::runtime_error("An unknown error occured trying to open the file.");
|
|
}
|
|
|
|
std::vector<char> buf(size_t(size + 1), 0);
|
|
ifs.read(buf.data(), static_cast<std::streamsize>(size));
|
|
|
|
return std::string(buf.data(), buf.data() + size);
|
|
}
|
|
|
|
gs::effect::effect(const std::string& code, const std::string& name)
|
|
{
|
|
auto gctx = gs::context();
|
|
|
|
char* error_buffer = nullptr;
|
|
gs_effect_t* effect = gs_effect_create(code.c_str(), name.c_str(), &error_buffer);
|
|
|
|
if (!effect) {
|
|
throw error_buffer ? std::runtime_error(error_buffer)
|
|
: std::runtime_error("Unknown error during effect compile.");
|
|
}
|
|
|
|
reset(effect, [](gs_effect_t* ptr) { gs_effect_destroy(ptr); });
|
|
}
|
|
|
|
gs::effect::effect(std::filesystem::path file) : effect(load_file_as_code(file), file.u8string()) {}
|
|
|
|
gs::effect::~effect()
|
|
{
|
|
auto gctx = gs::context();
|
|
reset();
|
|
}
|
|
|
|
std::size_t gs::effect::count_techniques()
|
|
{
|
|
return static_cast<size_t>(get()->techniques.num);
|
|
}
|
|
|
|
gs::effect_technique gs::effect::get_technique(std::size_t idx)
|
|
{
|
|
if (idx >= count_techniques()) {
|
|
return nullptr;
|
|
}
|
|
|
|
return gs::effect_technique(get()->techniques.array + idx, *this);
|
|
}
|
|
|
|
gs::effect_technique gs::effect::get_technique(const std::string& name)
|
|
{
|
|
for (std::size_t idx = 0; idx < count_techniques(); idx++) {
|
|
auto ptr = get()->techniques.array + idx;
|
|
if (strcmp(ptr->name, name.c_str()) == 0) {
|
|
return gs::effect_technique(ptr, *this);
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
bool gs::effect::has_technique(const std::string& name)
|
|
{
|
|
if (get_technique(name))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
std::size_t gs::effect::count_parameters()
|
|
{
|
|
return get()->params.num;
|
|
}
|
|
|
|
gs::effect_parameter gs::effect::get_parameter(std::size_t idx)
|
|
{
|
|
if (idx >= count_parameters()) {
|
|
throw std::out_of_range("Index is out of range.");
|
|
}
|
|
|
|
return gs::effect_parameter(get()->params.array + idx, *this);
|
|
}
|
|
|
|
gs::effect_parameter gs::effect::get_parameter(const std::string& name)
|
|
{
|
|
for (std::size_t idx = 0; idx < count_parameters(); idx++) {
|
|
auto ptr = get()->params.array + idx;
|
|
if (strcmp(ptr->name, name.c_str()) == 0) {
|
|
return gs::effect_parameter(ptr, *this);
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
bool gs::effect::has_parameter(const std::string& name)
|
|
{
|
|
if (get_parameter(name))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
bool gs::effect::has_parameter(const std::string& name, effect_parameter::type type)
|
|
{
|
|
auto eprm = get_parameter(name);
|
|
if (eprm)
|
|
return eprm.get_type() == type;
|
|
return false;
|
|
}
|