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use crate::{
MergedFrameSubmitNodes, RenderFeatureIndex, RenderPhase, RenderPhaseIndex, RenderRegistry,
RenderView, SubmitNodeId,
};
use rafx_api::RafxResult;
pub trait FeatureCommandWriter<WriteContextT> {
fn apply_setup(
&self,
write_context: &mut WriteContextT,
view: &RenderView,
render_phase_index: RenderPhaseIndex,
) -> RafxResult<()>;
fn render_element(
&self,
write_context: &mut WriteContextT,
view: &RenderView,
render_phase_index: RenderPhaseIndex,
index: SubmitNodeId,
) -> RafxResult<()>;
fn revert_setup(
&self,
write_context: &mut WriteContextT,
view: &RenderView,
render_phase_index: RenderPhaseIndex,
) -> RafxResult<()>;
fn feature_debug_name(&self) -> &'static str;
fn feature_index(&self) -> RenderFeatureIndex;
}
pub struct PreparedRenderData<WriteContextT> {
feature_writers: Vec<Option<Box<dyn FeatureCommandWriter<WriteContextT>>>>,
submit_nodes: MergedFrameSubmitNodes,
}
impl<WriteContextT> PreparedRenderData<WriteContextT> {
pub fn new(
feature_writers: Vec<Box<dyn FeatureCommandWriter<WriteContextT>>>,
submit_nodes: MergedFrameSubmitNodes,
) -> Self {
let mut writers: Vec<_> = (0..RenderRegistry::registered_feature_count())
.map(|_| None)
.collect();
for writer in feature_writers {
let feature_index = writer.feature_index();
writers[feature_index as usize] = Some(writer);
}
PreparedRenderData {
feature_writers: writers,
submit_nodes,
}
}
pub fn write_view_phase<PhaseT: RenderPhase>(
&self,
view: &RenderView,
write_context: &mut WriteContextT,
) -> RafxResult<()> {
let submit_nodes = self.submit_nodes.submit_nodes::<PhaseT>(view);
let render_phase_index = PhaseT::render_phase_index();
let mut previous_node_feature_index: i32 = -1;
for submit_node in submit_nodes {
if submit_node.feature_index() as i32 != previous_node_feature_index {
if previous_node_feature_index != -1 {
log::trace!("revert setup for feature {}", previous_node_feature_index);
self.feature_writers[previous_node_feature_index as usize]
.as_ref()
.unwrap()
.revert_setup(write_context, view, render_phase_index)?;
}
log::trace!("apply setup for feature {}", submit_node.feature_index());
self.feature_writers[submit_node.feature_index() as usize]
.as_ref()
.unwrap()
.apply_setup(write_context, view, render_phase_index)?;
previous_node_feature_index = submit_node.feature_index() as i32;
}
log::trace!(
"draw render node feature: {} node id: {}",
submit_node.feature_index(),
submit_node.submit_node_id(),
);
self.feature_writers[submit_node.feature_index() as usize]
.as_ref()
.unwrap()
.render_element(
write_context,
view,
render_phase_index,
submit_node.submit_node_id(),
)?;
}
if previous_node_feature_index != -1 {
log::trace!("revert setup for feature: {}", previous_node_feature_index);
self.feature_writers[previous_node_feature_index as usize]
.as_ref()
.unwrap()
.revert_setup(write_context, view, render_phase_index)?;
}
Ok(())
}
}