251 lines
7.9 KiB
C++
251 lines
7.9 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-effect-source.hpp"
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#include <cfloat>
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#include <climits>
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#include <cstdint>
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#include <fstream>
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#include <sys/stat.h>
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#include "strings.hpp"
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#define ST "Shader"
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#define ST_FILE "Shader.File"
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gfx::effect_source::parameter::parameter(std::shared_ptr<gs::effect> effect, std::string name)
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: effect(effect), name(name), description(""), formulae(""), visible(true)
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{
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if (!effect)
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throw std::invalid_argument("effect");
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if (!effect->has_parameter(name))
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throw std::invalid_argument("name");
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param = effect->get_parameter(name);
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if (param->has_annotation("description", gs::effect_parameter::type::String)) {
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param->get_annotation("description")->get_default_string(description);
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}
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if (param->has_annotation("formulae", gs::effect_parameter::type::String)) {
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param->get_annotation("formulae")->get_default_string(formulae);
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}
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if (param->has_annotation("visible", gs::effect_parameter::type::Boolean)) {
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param->get_annotation("visible")->get_default_bool(visible);
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} else {
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visible = true;
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}
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}
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gfx::effect_source::bool_parameter::bool_parameter(std::shared_ptr<gs::effect> effect, std::string name)
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: parameter(effect, name)
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{
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if (param->get_type() != gs::effect_parameter::type::Boolean)
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throw std::bad_cast();
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param->get_default_bool(value);
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}
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gfx::effect_source::value_parameter::value_parameter(std::shared_ptr<gs::effect> effect, std::string name)
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: parameter(effect, name)
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{
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std::shared_ptr<gs::effect_parameter> min = param->get_annotation("minimum");
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std::shared_ptr<gs::effect_parameter> max = param->get_annotation("maximum");
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switch (param->get_type()) {
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case gs::effect_parameter::type::Float:
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param->get_default_float(value.f[0]);
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if (min)
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min->get_default_float(minimum.f[0]);
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if (max)
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max->get_default_float(maximum.f[0]);
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break;
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case gs::effect_parameter::type::Float2:
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param->get_default_float2(value.f[0], value.f[1]);
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if (min)
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min->get_default_float2(minimum.f[0], minimum.f[1]);
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if (max)
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max->get_default_float2(maximum.f[0], maximum.f[1]);
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break;
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case gs::effect_parameter::type::Float3:
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param->get_default_float3(value.f[0], value.f[1], value.f[2]);
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if (min)
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min->get_default_float3(minimum.f[0], minimum.f[1], minimum.f[2]);
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if (max)
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max->get_default_float3(maximum.f[0], maximum.f[1], maximum.f[2]);
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break;
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case gs::effect_parameter::type::Float4:
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param->get_default_float4(value.f[0], value.f[1], value.f[2], value.f[3]);
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if (min)
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min->get_default_float4(minimum.f[0], minimum.f[1], minimum.f[2], minimum.f[3]);
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if (max)
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max->get_default_float4(maximum.f[0], maximum.f[1], maximum.f[2], maximum.f[3]);
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break;
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case gs::effect_parameter::type::Integer:
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param->get_default_int(value.i[0]);
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if (min)
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min->get_default_int(minimum.i[0]);
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if (max)
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max->get_default_int(maximum.i[0]);
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break;
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case gs::effect_parameter::type::Integer2:
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param->get_default_int2(value.i[0], value.i[1]);
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if (min)
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min->get_default_int2(minimum.i[0], minimum.i[1]);
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if (max)
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max->get_default_int2(maximum.i[0], maximum.i[1]);
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break;
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case gs::effect_parameter::type::Integer3:
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param->get_default_int3(value.i[0], value.i[1], value.i[2]);
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if (min)
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min->get_default_int3(minimum.i[0], minimum.i[1], minimum.i[2]);
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if (max)
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max->get_default_int3(maximum.i[0], maximum.i[1], maximum.i[2]);
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break;
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case gs::effect_parameter::type::Integer4:
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param->get_default_int4(value.i[0], value.i[1], value.i[2], value.i[3]);
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if (min)
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min->get_default_int4(minimum.i[0], minimum.i[1], minimum.i[2], minimum.i[3]);
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if (max)
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max->get_default_int4(maximum.i[0], maximum.i[1], maximum.i[2], maximum.i[3]);
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break;
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default:
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throw std::bad_cast();
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}
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}
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gfx::effect_source::matrix_parameter::matrix_parameter(std::shared_ptr<gs::effect> effect, std::string name)
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: parameter(effect, name)
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{
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std::shared_ptr<gs::effect_parameter> min = param->get_annotation("minimum");
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std::shared_ptr<gs::effect_parameter> max = param->get_annotation("maximum");
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param->get_default_matrix(value);
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if (min)
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min->get_default_matrix(minimum);
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if (max)
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max->get_default_matrix(maximum);
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}
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gfx::effect_source::string_parameter::string_parameter(std::shared_ptr<gs::effect> effect, std::string name)
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: parameter(effect, name)
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{
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param->get_default_string(value);
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}
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gfx::effect_source::texture_parameter::texture_parameter(std::shared_ptr<gs::effect> effect, std::string name)
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: parameter(effect, name)
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{}
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void gfx::effect_source::shader_instance::load_file(std::string file)
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{
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_params.clear();
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_effect.reset();
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_file = file;
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struct stat st;
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if (!os_stat(_file.c_str(), &st)) {
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_last_size = 0;
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_last_modify_time = 0;
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_last_create_time = 0;
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throw std::system_error(std::error_code(ENOENT, std::system_category()), file.c_str());
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} else {
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_last_size = st.st_size;
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_last_modify_time = st.st_mtime;
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_last_create_time = st.st_ctime;
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}
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_effect = gs::effect::create(file);
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auto prms = _effect->get_parameters();
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for (auto prm : prms) {
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param_ident_t identity;
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identity.first = prm->get_type();
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identity.second = prm->get_name();
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std::shared_ptr<parameter> parameter;
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switch (prm->get_type()) {
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case gs::effect_parameter::type::Boolean:
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parameter = std::make_shared<bool_parameter>(_effect, prm->get_name());
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break;
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case gs::effect_parameter::type::Float:
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case gs::effect_parameter::type::Float2:
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case gs::effect_parameter::type::Float3:
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case gs::effect_parameter::type::Float4:
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case gs::effect_parameter::type::Integer:
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case gs::effect_parameter::type::Integer2:
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case gs::effect_parameter::type::Integer3:
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case gs::effect_parameter::type::Integer4:
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parameter = std::make_shared<value_parameter>(_effect, prm->get_name());
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break;
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case gs::effect_parameter::type::Matrix:
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parameter = std::make_shared<matrix_parameter>(_effect, prm->get_name());
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break;
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case gs::effect_parameter::type::String:
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parameter = std::make_shared<string_parameter>(_effect, prm->get_name());
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break;
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case gs::effect_parameter::type::Texture:
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parameter = std::make_shared<texture_parameter>(_effect, prm->get_name());
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break;
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}
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_params.emplace(identity, parameter);
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}
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}
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gfx::effect_source::shader_instance::shader_instance(std::string file)
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: _last_check(0), _last_size(0), _last_modify_time(0), _last_create_time(0)
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{
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load_file(file);
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}
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gfx::effect_source::shader_instance::~shader_instance() {}
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void gfx::effect_source::shader_instance::tick(float_t time)
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{
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_last_check += time;
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if (_last_check >= 0.5f) {
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_last_check -= 0.5f;
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bool changed = false;
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struct stat st;
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if (os_stat(_file.c_str(), &st)) {
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changed =
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(_last_size != st.st_size) || (_last_modify_time != st.st_mtime) || (_last_create_time != st.st_ctime);
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}
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if (changed) {
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load_file(_file);
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}
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}
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}
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void gfx::effect_source::shader_instance::render(std::string technique)
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{
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gs_blend_state_push();
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gs_matrix_push();
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gs_reset_blend_state();
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gs_enable_blending(false);
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gs_enable_color(true, true, true, true);
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gs_enable_depth_test(false);
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gs_enable_stencil_test(false);
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gs_enable_stencil_write(false);
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gs_ortho(0, 1, 0, 1, -1., 1.);
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while (gs_effect_loop(_effect->get_object(), technique.c_str())) {
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}
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gs_matrix_pop();
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gs_blend_state_pop();
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}
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