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//! Code for using multiple draw passes in place of just one
//! Note that this can be extended to an arbitrary amount of draw passes.
use std::sync::{Arc, RwLock};
use super::{DrawPass, IntoDrawPass};
use crate::types::*;
use stockton_types::Session;
use anyhow::Result;
/// One draw pass, then another.
pub struct ConsDrawPass<A: DrawPass, B: DrawPass> {
pub a: A,
pub b: B,
}
impl<A: DrawPass, B: DrawPass> DrawPass for ConsDrawPass<A, B> {
fn queue_draw(
&mut self,
session: &Session,
img_view: &ImageViewT,
cmd_buffer: &mut CommandBufferT,
) -> Result<()> {
self.a.queue_draw(session, img_view, cmd_buffer)?;
self.b.queue_draw(session, img_view, cmd_buffer)?;
Ok(())
}
fn deactivate(self, device: &mut Arc<RwLock<DeviceT>>) -> Result<()> {
self.a.deactivate(device)?;
self.b.deactivate(device)
}
}
impl<A: DrawPass, B: DrawPass, IA: IntoDrawPass<A>, IB: IntoDrawPass<B>>
IntoDrawPass<ConsDrawPass<A, B>> for (IA, IB)
{
fn init(
self,
session: &Session,
adapter: &Adapter,
device: Arc<RwLock<DeviceT>>,
queue_negotiator: &mut crate::draw::queue_negotiator::QueueNegotiator,
swapchain_properties: &crate::draw::target::SwapchainProperties,
) -> Result<ConsDrawPass<A, B>> {
Ok(ConsDrawPass {
a: self.0.init(
session,
adapter,
device.clone(),
queue_negotiator,
swapchain_properties,
)?,
b: self.1.init(
session,
adapter,
device,
queue_negotiator,
swapchain_properties,
)?,
})
}
fn find_aux_queues<'a>(
adapter: &'a Adapter,
queue_negotiator: &mut crate::draw::queue_negotiator::QueueNegotiator,
) -> Result<Vec<(&'a QueueFamilyT, Vec<f32>)>> {
let mut v = IA::find_aux_queues(adapter, queue_negotiator)?;
v.extend(IB::find_aux_queues(adapter, queue_negotiator)?);
Ok(v)
}
}
|
