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/*
* Copyright (C) Oscar Shrimpton 2020
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
use crate::{draw::buffer::StagedBuffer, error::CreationError, types::*};
use hal::buffer::Usage;
use std::mem::ManuallyDrop;
use stockton_types::{Vector2, Vector3};
/// Represents a point of a triangle, including UV and texture information.
#[derive(Debug, Clone, Copy)]
pub struct UVPoint(pub Vector3, pub i32, pub Vector2);
/// Initial size of vertex buffer. TODO: Way of overriding this
pub const INITIAL_VERT_SIZE: u64 = 3 * 3000;
/// Initial size of index buffer. TODO: Way of overriding this
pub const INITIAL_INDEX_SIZE: u64 = 3000;
/// The buffers used for drawing, ie index and vertex buffer
pub struct DrawBuffers<'a> {
pub vertex_buffer: ManuallyDrop<StagedBuffer<'a, UVPoint>>,
pub index_buffer: ManuallyDrop<StagedBuffer<'a, (u16, u16, u16)>>,
}
impl<'a> DrawBuffers<'a> {
pub fn new(device: &mut Device, adapter: &Adapter) -> Result<DrawBuffers<'a>, CreationError> {
let vert = StagedBuffer::new(device, &adapter, Usage::VERTEX, INITIAL_VERT_SIZE)?;
let index = StagedBuffer::new(device, &adapter, Usage::INDEX, INITIAL_INDEX_SIZE)?;
Ok(DrawBuffers {
vertex_buffer: ManuallyDrop::new(vert),
index_buffer: ManuallyDrop::new(index),
})
}
pub fn deactivate(self, device: &mut Device) {
unsafe {
use core::ptr::read;
ManuallyDrop::into_inner(read(&self.vertex_buffer)).deactivate(device);
ManuallyDrop::into_inner(read(&self.index_buffer)).deactivate(device);
}
}
}
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