78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
#include "shaders.hpp"
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#include <SFML/Graphics/Image.hpp>
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#include "dbc.hpp"
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#include <fmt/core.h>
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#include "config.hpp"
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#include "constants.hpp"
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#include <memory>
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namespace shaders {
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using std::shared_ptr, std::make_shared;
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static ShaderManager SMGR;
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static bool INITIALIZED = false;
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static int VERSION = 0;
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inline void configure_shader_defaults(std::shared_ptr<sf::Shader> ptr) {
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ptr->setUniform("source", sf::Shader::CurrentTexture);
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}
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bool load_shader(std::string name, nlohmann::json& settings) {
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std::string file_name = settings["file_name"];
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auto ptr = std::make_shared<sf::Shader>();
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bool good = ptr->loadFromFile(file_name, sf::Shader::Type::Fragment);
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if(good) {
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configure_shader_defaults(ptr);
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SMGR.shaders.try_emplace(name, name, file_name, ptr);
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}
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return good;
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}
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void init() {
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if(!INITIALIZED) {
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dbc::check(sf::Shader::isAvailable(), "no shaders?!");
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INITIALIZED = true;
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Config config("assets/shaders.json");
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bool good = load_shader("ERROR", config["ERROR"]);
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dbc::check(good, "Failed to load ERROR shader. Look in assets/shaders.json");
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for(auto& [name, settings] : config.json().items()) {
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if(name == "ERROR") continue;
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dbc::check(!SMGR.shaders.contains(name),
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fmt::format("shader name '{}' duplicated in assets/shaders.json", name));
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good = load_shader(name, settings);
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if(!good) {
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dbc::log(fmt::format("failed to load shader {}", name));
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SMGR.shaders.insert_or_assign(name, SMGR.shaders.at("ERROR"));
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}
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}
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}
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}
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std::shared_ptr<sf::Shader> get(const std::string& name) {
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dbc::check(INITIALIZED, "you forgot to shaders::init()");
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dbc::check(SMGR.shaders.contains(name),
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fmt::format("shader name '{}' not in assets/shaders.json", name));
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auto& rec = SMGR.shaders.at(name);
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return rec.ptr;
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}
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int reload() {
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VERSION++;
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INITIALIZED = false;
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SMGR.shaders.clear();
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init();
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return VERSION;
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}
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bool updated(int my_version) {
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return my_version != VERSION;
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}
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int version() {
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return VERSION;
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}
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};
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