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// Copyright (C) 2019 Oscar Shrimpton
// 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/>.
//! Helper struct. Keeps the data for each frame 'in flight' seperate instead of linked lists.
use hal::{Device as DeviceTrait};
use hal::command::CommandBuffer;
use hal::Graphics;
use back::{Backend};
use hal::pool::{CommandPool};
/// Helper struct for a frame that can be in flight
pub struct FrameCell {
/// How we ask the GPU to do work for us.
pub command_buffer: CommandBuffer<Backend, Graphics>,
/// Signalled once an image is acquired to draw on.
pub image_available: <Backend as hal::Backend>::Semaphore,
/// Signalled once the frame is done being drawn.
pub render_finished: <Backend as hal::Backend>::Semaphore,
/// Signalled once the frame is presented.
pub frame_presented: <Backend as hal::Backend>::Fence
}
impl FrameCell {
/// Safely deinitialises all the objects in this struct.
/// Use this instead of drop.
pub unsafe fn destroy(self, device: &<Backend as hal::Backend>::Device, command_pool: &mut CommandPool<Backend, Graphics>) {
// fences & semaphores
device.destroy_semaphore(self.image_available);
device.destroy_semaphore(self.render_finished);
device.destroy_fence(self.frame_presented);
// command buffer
command_pool.free(vec![self.command_buffer]);
}
}
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