diff options
Diffstat (limited to 'wgpu/src/backend.rs')
| -rw-r--r-- | wgpu/src/backend.rs | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/wgpu/src/backend.rs b/wgpu/src/backend.rs index 5019191c..6ccf4111 100644 --- a/wgpu/src/backend.rs +++ b/wgpu/src/backend.rs @@ -1,3 +1,4 @@ +use crate::buffer; use crate::core::{Color, Size, Transformation}; use crate::graphics::backend; use crate::graphics::color; @@ -30,6 +31,7 @@ pub struct Backend { pipeline_storage: pipeline::Storage, #[cfg(any(feature = "image", feature = "svg"))] image_pipeline: image::Pipeline, + staging_belt: wgpu::util::StagingBelt, } impl Backend { @@ -61,6 +63,13 @@ impl Backend { #[cfg(any(feature = "image", feature = "svg"))] image_pipeline, + + // TODO: Resize belt smartly (?) + // It would be great if the `StagingBelt` API exposed methods + // for introspection to detect when a resize may be worth it. + staging_belt: wgpu::util::StagingBelt::new( + buffer::MAX_WRITE_SIZE as u64, + ), } } @@ -105,6 +114,8 @@ impl Backend { &layers, ); + self.staging_belt.finish(); + self.render( device, encoder, @@ -123,12 +134,20 @@ impl Backend { self.image_pipeline.end_frame(); } + /// Recalls staging memory for future uploads. + /// + /// This method should be called after the command encoder + /// has been submitted. + pub fn recall(&mut self) { + self.staging_belt.recall(); + } + fn prepare( &mut self, device: &wgpu::Device, queue: &wgpu::Queue, format: wgpu::TextureFormat, - _encoder: &mut wgpu::CommandEncoder, + encoder: &mut wgpu::CommandEncoder, scale_factor: f32, target_size: Size<u32>, transformation: Transformation, @@ -144,7 +163,8 @@ impl Backend { if !layer.quads.is_empty() { self.quad_pipeline.prepare( device, - queue, + encoder, + &mut self.staging_belt, &layer.quads, transformation, scale_factor, @@ -157,7 +177,8 @@ impl Backend { self.triangle_pipeline.prepare( device, - queue, + encoder, + &mut self.staging_belt, &layer.meshes, scaled, ); @@ -171,8 +192,8 @@ impl Backend { self.image_pipeline.prepare( device, - queue, - _encoder, + encoder, + &mut self.staging_belt, &layer.images, scaled, scale_factor, @@ -184,6 +205,7 @@ impl Backend { self.text_pipeline.prepare( device, queue, + encoder, &layer.text, layer.bounds, scale_factor, |