fluffl 0.0.5

A cross-platform multimedia layer that exposes opengl,sockets,and audio utilities for desktop and browser
Documentation 
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use super::{buffer::*, *};
use crate::*;

/// `buffer_name` should be a unique string to name your buffer.
/// `buffer_object` is just the buffer object
pub struct BufferPair {
    buffer_name: &'static str,
    buffer_object: Box<dyn HasBufferObj>,
}

impl BufferPair {
    pub fn new(name: &'static str, object: Box<dyn HasBufferObj>) -> Self {
        Self {
            buffer_name: name,
            buffer_object: object,
        }
    }
}

pub trait ArrayBuilder {
    type InnerStruct;
    fn init(self, buffer_list: Vec<BufferPair>) -> Self::InnerStruct;
}

impl ArrayBuilder for OglIncomplete<OglArray> {
    type InnerStruct = OglArray;
    /// initalize the vertex array object bv first specifying the buffers
    /// every buffer is given a name
    fn init(mut self, buffer_list: Vec<BufferPair>) -> Self::InnerStruct {
        let gl = self.inner.gl.clone();
        //make sure vao is bound
        unsafe {
            self.inner.gl_array = Some(gl.create_vertex_array().unwrap());
            self.inner.bind(true);
        }
        for BufferPair {
            buffer_name,
            buffer_object,
        } in buffer_list
        {
            //bind buffer object
            buffer_object.bind(true);
            let index = buffer_object.info().index;
            unsafe {
                //define attrib pointers
                gl.vertex_attrib_pointer_f32(
                    index,
                    buffer_object.info().num_comps as i32,
                    glow::FLOAT,
                    false,
                    0,
                    0,
                );

                //enable attrib pointer
                gl.enable_vertex_attrib_array(index);
            }

            self.inner
                .buf_table
                .insert(buffer_name.to_string(), buffer_object);
        }
        self.inner
    }
}

pub struct OglArray {
    gl: GlowGL,
    gl_array: Option<glow::VertexArray>,
    buf_table: HashMap<String, Box<dyn HasBufferObj>>,
}

impl OglArray {
    pub fn new(gl: &GlowGL) -> OglIncomplete<Self> {
        OglIncomplete::new(Self {
            gl: gl.clone(),
            gl_array: None,
            buf_table: HashMap::new(),
        })
    }
    pub fn get(&self, buffer_name: &'static str) -> Option<&dyn HasBufferObj> {
        self.buf_table
            .get(buffer_name)
            .map(|box_ptr| box_ptr.as_ref())
    }
    pub fn get_mut(
        &mut self,
        buffer_name: &'static str,
    ) -> Option<&mut (dyn HasBufferObj + 'static)> {
        self.buf_table
            .get_mut(buffer_name)
            .map(|box_ptr| box_ptr.as_mut())
    }
}

impl Bindable for OglArray {
    fn bind(&self, ok: bool) {
        unsafe {
            self.gl
                .bind_vertex_array(ok.map(|| self.gl_array).flatten());
        }
    }
}

impl Drop for OglArray {
    fn drop(&mut self) {
        let gl = self.gl.clone();
        unsafe {
            gl.delete_vertex_array(self.gl_array.unwrap());
        }
    }
}