obs-StreamFX/source/obs/gs/gs-effect.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 "gs-effect.hpp"
#include <fstream>
#include <iostream>
#include <stdexcept>
#include <vector>
#include "obs/gs/gs-helper.hpp"
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// OBS
#ifdef _MSC_VER
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#pragma warning(push)
#pragma warning(disable : 4201)
#endif
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#include <obs.h>
#ifdef _MSC_VER
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#pragma warning(pop)
#endif
//#define OBS_LOAD_EFFECT_FILE
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gs::effect::effect() : m_effect(nullptr) {}
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gs::effect::effect(std::string file)
{
#ifdef OBS_LOAD_EFFECT_FILE
char* errorMessage = nullptr;
auto gctx = gs::context();
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m_effect = gs_effect_create_from_file(file.c_str(), &errorMessage);
if (!m_effect || errorMessage) {
std::string error = "Generic Error";
if (errorMessage) {
error = std::string(errorMessage);
bfree((void*)errorMessage);
}
throw std::runtime_error(error);
}
#else
std::ifstream filestream = std::ifstream(file, std::ios::binary);
if (!filestream.is_open()) {
throw std::runtime_error("Failed to open file.");
}
filestream.ignore(std::numeric_limits<std::streamsize>::max());
std::streamsize length = filestream.gcount();
filestream.clear(); // Since ignore will have set eof.
filestream.seekg(0, std::ios_base::beg);
if (length > 256 * 1024 * 1024) {
throw std::runtime_error("Shader too large (>256mb)");
}
std::vector<char> shader_buf(size_t(length + 1), 0);
filestream.read(shader_buf.data(), length);
char* errorMessage = nullptr;
auto gctx = gs::context();
m_effect = gs_effect_create(shader_buf.data(), file.c_str(), &errorMessage);
if (!m_effect || errorMessage) {
std::string error = "Generic Error";
if (errorMessage) {
error = std::string(errorMessage);
bfree((void*)errorMessage);
}
throw std::runtime_error(error);
}
#endif
}
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gs::effect::effect(std::string code, std::string name)
{
char* errorMessage = nullptr;
auto gctx = gs::context();
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m_effect = gs_effect_create(code.c_str(), name.c_str(), &errorMessage);
if (!m_effect || errorMessage) {
std::string error = "Generic Error";
if (errorMessage) {
error = std::string(errorMessage);
bfree((void*)errorMessage);
}
throw std::runtime_error(error);
}
}
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gs::effect::~effect()
{
auto gctx = gs::context();
gs_effect_destroy(m_effect);
}
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gs_effect_t* gs::effect::get_object()
{
return m_effect;
}
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size_t gs::effect::count_parameters()
{
return (size_t)gs_effect_get_num_params(m_effect);
}
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std::list<gs::effect_parameter> gs::effect::get_parameters()
{
size_t num = gs_effect_get_num_params(m_effect);
std::list<gs::effect_parameter> ps;
for (size_t idx = 0; idx < num; idx++) {
ps.emplace_back(get_parameter(idx));
}
return ps;
}
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gs::effect_parameter gs::effect::get_parameter(size_t idx)
{
gs_eparam_t* param = gs_effect_get_param_by_idx(m_effect, idx);
if (!param)
throw std::invalid_argument("parameter with index not found");
return effect_parameter(param);
}
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bool gs::effect::has_parameter(std::string name)
{
gs_eparam_t* param = gs_effect_get_param_by_name(m_effect, name.c_str());
return (param != nullptr);
}
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bool gs::effect::has_parameter(std::string name, effect_parameter::type type)
{
gs_eparam_t* param = gs_effect_get_param_by_name(m_effect, name.c_str());
if (param == nullptr)
return false;
gs::effect_parameter eprm(param);
return eprm.get_type() == type;
}
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gs::effect_parameter gs::effect::get_parameter(std::string name)
{
gs_eparam_t* param = gs_effect_get_param_by_name(m_effect, name.c_str());
if (!param)
throw std::invalid_argument("parameter with name not found");
return effect_parameter(param);
}
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gs::effect_parameter::effect_parameter(gs_eparam_t* param)
{
if (!param)
throw std::invalid_argument("param is null");
m_param = param;
gs_effect_get_param_info(m_param, &m_paramInfo);
}
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std::string gs::effect_parameter::get_name()
{
return m_paramInfo.name;
}
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gs::effect_parameter::type gs::effect_parameter::get_type()
{
switch (m_paramInfo.type) {
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case GS_SHADER_PARAM_BOOL:
return type::Boolean;
case GS_SHADER_PARAM_FLOAT:
return type::Float;
case GS_SHADER_PARAM_VEC2:
return type::Float2;
case GS_SHADER_PARAM_VEC3:
return type::Float3;
case GS_SHADER_PARAM_VEC4:
return type::Float4;
case GS_SHADER_PARAM_INT:
return type::Integer;
case GS_SHADER_PARAM_INT2:
return type::Integer2;
case GS_SHADER_PARAM_INT3:
return type::Integer3;
case GS_SHADER_PARAM_INT4:
return type::Integer4;
case GS_SHADER_PARAM_MATRIX4X4:
return type::Matrix;
case GS_SHADER_PARAM_TEXTURE:
return type::Texture;
//case GS_SHADER_PARAM_STRING:
// return Type::String;
default:
case GS_SHADER_PARAM_UNKNOWN:
return type::Unknown;
}
}
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void gs::effect_parameter::set_bool(bool v)
{
if (get_type() != type::Boolean)
throw std::bad_cast();
gs_effect_set_bool(m_param, v);
}
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void gs::effect_parameter::set_bool_array(bool v[], size_t sz)
{
if (get_type() != type::Boolean)
throw std::bad_cast();
gs_effect_set_val(m_param, v, sz);
}
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void gs::effect_parameter::set_float(float_t x)
{
if (get_type() != type::Float)
throw std::bad_cast();
gs_effect_set_float(m_param, x);
}
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void gs::effect_parameter::set_float2(vec2& v)
{
if (get_type() != type::Float2)
throw std::bad_cast();
gs_effect_set_vec2(m_param, &v);
}
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void gs::effect_parameter::set_float2(float_t x, float_t y)
{
if (get_type() != type::Float2)
throw std::bad_cast();
vec2 v = {{x, y}};
gs_effect_set_vec2(m_param, &v);
}
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void gs::effect_parameter::set_float3(vec3& v)
{
if (get_type() != type::Float3)
throw std::bad_cast();
gs_effect_set_vec3(m_param, &v);
}
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void gs::effect_parameter::set_float3(float_t x, float_t y, float_t z)
{
if (get_type() != type::Float3)
throw std::bad_cast();
vec3 v = {{x, y, z, 0}};
gs_effect_set_vec3(m_param, &v);
}
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void gs::effect_parameter::set_float4(vec4& v)
{
if (get_type() != type::Float4)
throw std::bad_cast();
gs_effect_set_vec4(m_param, &v);
}
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void gs::effect_parameter::set_float4(float_t x, float_t y, float_t z, float_t w)
{
if (get_type() != type::Float4)
throw std::bad_cast();
vec4 v = {{x, y, z, w}};
gs_effect_set_vec4(m_param, &v);
}
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void gs::effect_parameter::set_float_array(float_t v[], size_t sz)
{
if ((get_type() != type::Float) && (get_type() != type::Float2) && (get_type() != type::Float3)
&& (get_type() != type::Float4))
throw std::bad_cast();
gs_effect_set_val(m_param, v, sizeof(float_t) * sz);
}
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void gs::effect_parameter::set_int(int32_t x)
{
if ((get_type() != type::Integer) && (get_type() != type::Unknown))
throw std::bad_cast();
gs_effect_set_int(m_param, x);
}
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void gs::effect_parameter::set_int2(int32_t x, int32_t y)
{
if ((get_type() != type::Integer2) && (get_type() != type::Unknown))
throw std::bad_cast();
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int32_t v[2] = {x, y};
gs_effect_set_val(m_param, v, sizeof(int) * 2);
}
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void gs::effect_parameter::set_int3(int32_t x, int32_t y, int32_t z)
{
if ((get_type() != type::Integer3) && (get_type() != type::Unknown))
throw std::bad_cast();
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int32_t v[3] = {x, y, z};
gs_effect_set_val(m_param, v, sizeof(int) * 3);
}
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void gs::effect_parameter::set_int4(int32_t x, int32_t y, int32_t z, int32_t w)
{
if ((get_type() != type::Integer4) && (get_type() != type::Unknown))
throw std::bad_cast();
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int32_t v[4] = {x, y, z, w};
gs_effect_set_val(m_param, v, sizeof(int) * 4);
}
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void gs::effect_parameter::set_int_array(int32_t v[], size_t sz)
{
if ((get_type() != type::Integer) && (get_type() != type::Integer2) && (get_type() != type::Integer3)
&& (get_type() != type::Integer4) && (get_type() != type::Unknown))
throw std::bad_cast();
gs_effect_set_val(m_param, v, sizeof(int) * sz);
}
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void gs::effect_parameter::set_matrix(matrix4& v)
{
if (get_type() != type::Matrix)
throw std::bad_cast();
gs_effect_set_matrix4(m_param, &v);
}
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void gs::effect_parameter::set_texture(std::shared_ptr<gs::texture> v)
{
if (get_type() != type::Texture)
throw std::bad_cast();
gs_effect_set_texture(m_param, v->get_object());
}
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void gs::effect_parameter::set_texture(gs_texture_t* v)
{
if (get_type() != type::Texture)
throw std::bad_cast();
gs_effect_set_texture(m_param, v);
}
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void gs::effect_parameter::set_sampler(std::shared_ptr<gs::sampler> v)
{
if (get_type() != type::Texture)
throw std::bad_cast();
gs_effect_set_next_sampler(m_param, v->get_object());
}
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void gs::effect_parameter::set_sampler(gs_sampler_state* v)
{
if (get_type() != type::Texture)
throw std::bad_cast();
gs_effect_set_next_sampler(m_param, v);
}