ShaderManager.cpp

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#include "eepch.h"
#include "ShaderManager.h"
 
#include <ElevateEngine/Core/Log.h>
#include <ElevateEngine/Renderer/Shader/Shader.h>
 
namespace Elevate {
    ShaderPtr ShaderManager::LoadShader(const std::string& name, ShaderPtr shader)
    {
        if (name == EE_DEFAULT_SHADER && GetShader(EE_DEFAULT_SHADER))
        {
            EE_CORE_ERROR("(ShaderManager::LoadShader) : You cannot create a shader with the name : default. This is reservez for the default shader for the whole engine.");
            return nullptr;
        }
 
        if (instance().m_Shaders.count(name) > 0)
        {
            return instance().m_Shaders[name];
        }
        else
        {
            instance().m_Shaders[name] = shader;
            return shader;
        }
    }
 
    ShaderPtr ShaderManager::LoadShader(const std::string& name, const std::string& vertexSrcPath, const std::string& fragSrcPath)
    {
        return LoadShader(name, Shader::CreateFromFiles(vertexSrcPath, fragSrcPath));
    }
 
    ShaderPtr ShaderManager::LoadShader(const std::string& name, const std::string& vertexSrcPath, const std::string& fragSrcPath, const std::string& customVertCode, const std::string& customFragCode)
    {
        return LoadShader(name, Shader::CreateFromFiles(vertexSrcPath, fragSrcPath, customVertCode, customFragCode));
    }
 
    ShaderPtr ShaderManager::GetShader(const std::string& name)
    {
        return (instance().m_Shaders.count(name) > 0) ? instance().m_Shaders[name] : nullptr;
    }
 
    void ShaderManager::Init()
    {
        EE_CORE_INFO("Initializing ShaderManager.");
        // Create a default shader.
        EE_CORE_TRACE("(ShaderManager) : Creating default shader.");
        LoadShader(EE_DEFAULT_SHADER, Shader::CreateDefault());
        EE_CORE_INFO("Initialized ShaderManager.");
    }
 
    ShaderManager& ShaderManager::instance()
    {
        static ShaderManager instance;
        if (!instance.m_initialized)
        {
            instance.m_initialized = true;
            instance.Init();
        }
        return instance;
    }
}