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//! Traits and common draw passes.
use super::{queue_negotiator::QueueNegotiator, RenderingContext};
use crate::types::*;
use stockton_types::Session;
use anyhow::Result;
mod cons;
pub mod util;
pub use cons::ConsDrawPass;
/// One of several 'passes' that draw on each frame.
pub trait DrawPass {
/// Queue any necessary draw commands to cmd_buffer
/// This should assume the command buffer isn't in the middle of a renderpass, and should leave it as such.
fn queue_draw(
&mut self,
session: &Session,
img_view: &ImageViewT,
cmd_buffer: &mut CommandBufferT,
) -> Result<()>;
/// Called just after the surface changes (probably a resize).
fn handle_surface_change(
&mut self,
session: &Session,
context: &mut RenderingContext,
) -> Result<()>;
/// Deactivate any vulkan parts that need to be deactivated
fn deactivate(self, context: &mut RenderingContext) -> Result<()>;
}
/// A type that can be made into a specific draw pass type.
/// This allows extra data to be used in initialisation without the Renderer needing to worry about it.
pub trait IntoDrawPass<T: DrawPass> {
fn init(self, session: &mut Session, context: &mut RenderingContext) -> Result<T>;
/// This function should ask the queue negotatior to find families for any auxilary operations this draw pass needs to perform
/// For example, .find(&TexLoadQueue)
/// It should return then call .family_spec for each queue type negotiated and return the results.
fn find_aux_queues<'a>(
adapter: &'a Adapter,
queue_negotiator: &mut QueueNegotiator,
) -> Result<Vec<(&'a QueueFamilyT, Vec<f32>)>>;
}
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