flo_render 0.3.1

Streaming API for rendering graphics on hardware
Documentation 
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use super::bindings::*;
use crate::buffer::*;

use metal;

use std::ops::{Deref};
use std::ffi::{c_void};

///
/// Manages a metal buffer
///
pub struct Buffer {
    /// The buffer that this is managing
    buffer: metal::Buffer
}

impl Buffer {
    ///
    /// Creates a buffer from some vertices
    ///
    pub fn from_vertices<VertexIterator: IntoIterator<Item=Vertex2D>>(device: &metal::Device, vertices: VertexIterator) -> Buffer {
        // Convert the vertices to Metal format
        let vertices = vertices.into_iter()
            .map(|vertex| MetalVertex2D::from(vertex))
            .collect::<Vec<_>>();

        // Generate the buffer
        let buffer = device.new_buffer_with_data(vertices.as_ptr() as *const c_void,
            (vertices.len() * std::mem::size_of::<MetalVertex2D>()) as u64,
            metal::MTLResourceOptions::CPUCacheModeDefaultCache | metal::MTLResourceOptions::StorageModeManaged);

        // Return the buffer object
        Buffer {
            buffer: buffer
        }
    }

    ///
    /// Creates a buffer from a list of indexes
    ///
    pub fn from_indices(device: &metal::Device, indices: Vec<u16>) -> Buffer {
        let buffer = device.new_buffer_with_data(indices.as_ptr() as *const c_void,
            (indices.len() * std::mem::size_of::<u16>()) as u64,
            metal::MTLResourceOptions::CPUCacheModeDefaultCache | metal::MTLResourceOptions::StorageModeManaged);

        Buffer {
            buffer: buffer
        }
    }
}

impl Deref for Buffer {
    type Target = metal::Buffer;

    fn deref(&self) -> &metal::Buffer {
        &self.buffer
    }
}