Shader ResourceManager::loadShaderFromFile(const GLchar* vShaderFile, const GLchar* fShaderFile, const GLchar* gShaderFile)
{
// Define variables
std::string vertexCode;
std::string fragmentCode;
std::string geometryCode;
try
{
// Vertex
std::ifstream vertexShaderFile(vShaderFile);
std::stringstream vShaderStream;
vShaderStream << vertexShaderFile.rdbuf();
vertexShaderFile.close();
vertexCode = vShaderStream.str();
// Fragment
std::ifstream fragmentShaderFile(fShaderFile);
std::stringstream fShaderStream;
fShaderStream << fragmentShaderFile.rdbuf();
fragmentShaderFile.close();
fragmentCode = fShaderStream.str();
// Geometry
if (gShaderFile != nullptr)
{
std::ifstream geometryShaderFile(gShaderFile);
std::stringstream gShaderStream;
gShaderStream << geometryShaderFile.rdbuf();
geometryShaderFile.close();
geometryCode = gShaderStream.str();
}
}
catch (std::ifstream::failure e)
{
std::cout << "ERROR::SHADER::FILE_NOT_SUCCESSFULLY_READ" << std::endl;
}
Shader shader;
shader.Compile(vertexCode.c_str(), fragmentCode.c_str(), gShaderFile != nullptr ? geometryCode.c_str() : nullptr);
return shader;
}
Shader resourceManagerClass::loadShaderFromFile(const GLchar *vShaderFile, const GLchar *fShaderFile, const GLchar *gShaderFile)
{
// 1. Retrieve the vertex/fragment source code from filePath
std::string vertexCode;
std::string fragmentCode;
std::string geometryCode;
try
{
// Open files
std::ifstream vertexShaderFile(vShaderFile);
std::ifstream fragmentShaderFile(fShaderFile);
std::stringstream vShaderStream, fShaderStream;
// Read file's buffer contents into streams
vShaderStream << vertexShaderFile.rdbuf();
fShaderStream << fragmentShaderFile.rdbuf();
// close file handlers
vertexShaderFile.close();
fragmentShaderFile.close();
// Convert stream into string
vertexCode = vShaderStream.str();
fragmentCode = fShaderStream.str();
// If geometry shader path is present, also load a geometry shader
if (gShaderFile != nullptr)
{
std::ifstream geometryShaderFile(gShaderFile);
std::stringstream gShaderStream;
gShaderStream << geometryShaderFile.rdbuf();
geometryShaderFile.close();
geometryCode = gShaderStream.str();
}
}
catch (std::exception e)
{
std::cout << "ERROR::SHADER: Failed to read shader files" << std::endl;
}
const GLchar *vShaderCode = vertexCode.c_str();
const GLchar *fShaderCode = fragmentCode.c_str();
const GLchar *gShaderCode = geometryCode.c_str();
// 2. Now create shader object from source code
Shader shader;
shader.Compile(vShaderCode, fShaderCode, gShaderFile != nullptr ? gShaderCode : nullptr);
return shader;
}
