glenda 0.2.0

An opengl utility and renderer library.
Documentation 
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pub mod shader;
pub mod vertex_array;
pub mod texture;

use gl;

pub extern "system"
fn standard_debug_callback(
    source: u32,
    gltype: u32,
    id: u32,
    severity: u32,
    _length: i32,
    message: *const i8,
    _user_param: *mut std::ffi::c_void,
) {
    if severity == gl::DEBUG_SEVERITY_NOTIFICATION {
        return;
    }

    let source = match source {
        gl::DEBUG_SOURCE_API => "API",
        gl::DEBUG_SOURCE_WINDOW_SYSTEM => "Window System",
        gl::DEBUG_SOURCE_SHADER_COMPILER => "Shader Compiler",
        gl::DEBUG_SOURCE_THIRD_PARTY => "Third Party",
        gl::DEBUG_SOURCE_APPLICATION => "Application",
        gl::DEBUG_SOURCE_OTHER => "Other",
        _ => "Unknown",
    };

    let gltype = match gltype {
        gl::DEBUG_TYPE_ERROR => "Error",
        gl::DEBUG_TYPE_DEPRECATED_BEHAVIOR => "Deprecated Behavior",
        gl::DEBUG_TYPE_UNDEFINED_BEHAVIOR => "Undefined Behavior",
        gl::DEBUG_TYPE_PORTABILITY => "Portability",
        gl::DEBUG_TYPE_PERFORMANCE => "Performance",
        gl::DEBUG_TYPE_MARKER => "Marker",
        gl::DEBUG_TYPE_PUSH_GROUP => "Push Group",
        gl::DEBUG_TYPE_POP_GROUP => "Pop Group",
        gl::DEBUG_TYPE_OTHER => "Other",
        _ => "Unknown",
    };

    let severity = match severity {
        gl::DEBUG_SEVERITY_HIGH => "High",
        gl::DEBUG_SEVERITY_MEDIUM => "Medium",
        gl::DEBUG_SEVERITY_LOW => "Low",
        gl::DEBUG_SEVERITY_NOTIFICATION => "Notification",
        _ => "Unknown",
    };

    unsafe {
        let message = std::ffi::CStr::from_ptr(message).to_str().unwrap();
        println!(
            "OpenGL Debug Message: source: {}, type: {}, id: {}, severity: {}, message: {}",
            source, gltype, id, severity, message
        );
    }
}