Re-add upload texture (#2915)

* vello: code cleanup of resource overwrites

* upload_texture: upload cpu textures as SRGBA8

* vello: fix wgpu::Texture leak within vello's `context.resource_overrides` HashMap

* fix missing feature gate

node-graph/wgpu-executor/src/texture_upload.rs

@@ -0,0 +1,51 @@
+use crate::WgpuExecutor;
+use graphene_core::color::SRGBA8;
+use graphene_core::instances::Instance;
+use graphene_core::raster_types::{CPU, GPU, Raster, RasterDataTable};
+use graphene_core::{Ctx, ExtractFootprint};
+use wgpu::util::{DeviceExt, TextureDataOrder};
+use wgpu::{Extent3d, TextureDescriptor, TextureDimension, TextureFormat, TextureUsages};
+
+#[node_macro::node(category(""))]
+pub async fn upload_texture<'a: 'n>(_: impl ExtractFootprint + Ctx, input: RasterDataTable<CPU>, executor: &'a WgpuExecutor) -> RasterDataTable<GPU> {
+	let device = &executor.context.device;
+	let queue = &executor.context.queue;
+	let instances = input
+		.instance_ref_iter()
+		.map(|instance| {
+			let image = instance.instance;
+			let rgba8_data: Vec<SRGBA8> = image.data.iter().map(|x| (*x).into()).collect();
+
+			let texture = device.create_texture_with_data(
+				queue,
+				&TextureDescriptor {
+					label: Some("upload_texture node texture"),
+					size: Extent3d {
+						width: image.width,
+						height: image.height,
+						depth_or_array_layers: 1,
+					},
+					mip_level_count: 1,
+					sample_count: 1,
+					dimension: TextureDimension::D2,
+					format: TextureFormat::Rgba8UnormSrgb,
+					// I don't know what usages are actually necessary
+					usage: TextureUsages::TEXTURE_BINDING | TextureUsages::COPY_DST | TextureUsages::COPY_SRC,
+					view_formats: &[],
+				},
+				TextureDataOrder::LayerMajor,
+				bytemuck::cast_slice(rgba8_data.as_slice()),
+			);
+
+			Instance {
+				instance: Raster::new_gpu(texture.into()),
+				transform: *instance.transform,
+				alpha_blending: *instance.alpha_blending,
+				source_node_id: *instance.source_node_id,
+			}
+		})
+		.collect();
+
+	queue.submit([]);
+	instances
+}