Desktop: Native export (#3188)

* Testing native export with raster convert implementation

* Jpg export

* Fix transparent export

* move texture conversion to runtime

* fixup

* move image encoding into editor export  function

* remove unused frontend message

* remove unused type

Cargo.lock

@@ -2310,6 +2310,7 @@ dependencies = [
  "graph-craft",
  "graphene-std",
  "graphite-proc-macros",
+ "image",
  "interpreted-executor",
  "js-sys",
  "kurbo",

editor/Cargo.toml

@@ -45,6 +45,7 @@ web-sys = { workspace = true }
 vello = { workspace = true }
 base64 = { workspace = true }
 spin = { workspace = true }
+image = { workspace = true }
 
 # Optional local dependencies
 wgpu-executor = { workspace = true, optional = true }

editor/src/node_graph_executor.rs

@@ -190,6 +190,12 @@ impl NodeGraphExecutor {
 		let size = bounds[1] - bounds[0];
 		let transform = DAffine2::from_translation(bounds[0]).inverse();
 
+		let export_format = if export_config.file_type == FileType::Svg || cfg!(not(feature = "gpu")) {
+			graphene_std::application_io::ExportFormat::Svg
+		} else {
+			graphene_std::application_io::ExportFormat::Texture
+		};
+
 		let render_config = RenderConfig {
 			viewport: Footprint {
 				transform: DAffine2::from_scale(DVec2::splat(export_config.scale_factor)) * transform,
@@ -197,7 +203,7 @@ impl NodeGraphExecutor {
 				..Default::default()
 			},
 			time: Default::default(),
-			export_format: graphene_std::application_io::ExportFormat::Svg,
+			export_format,
 			render_mode: document.render_mode,
 			hide_artboards: export_config.transparent_background,
 			for_export: true,
@@ -219,21 +225,28 @@ impl NodeGraphExecutor {
 	}
 
 	fn export(&self, node_graph_output: TaggedValue, export_config: ExportConfig, responses: &mut VecDeque<Message>) -> Result<(), String> {
-		let TaggedValue::RenderOutput(RenderOutput {
-			data: RenderOutputType::Svg { svg, .. },
-			..
-		}) = node_graph_output
-		else {
-			return Err("Incorrect render type for exporting (expected RenderOutput::Svg)".to_string());
-		};
-
 		let ExportConfig {
-			file_type, name, size, scale_factor, ..
+			file_type,
+			name,
+			size,
+			scale_factor,
+			#[cfg(feature = "gpu")]
+			transparent_background,
+			..
 		} = export_config;
 
-		let file_suffix = &format!(".{file_type:?}").to_lowercase();
-		let name = name + file_suffix;
+		let file_extension = match file_type {
+			FileType::Svg => "svg",
+			FileType::Png => "png",
+			FileType::Jpg => "jpg",
+		};
+		let name = format!("{name}.{file_extension}");
 
+		match node_graph_output {
+			TaggedValue::RenderOutput(RenderOutput {
+				data: RenderOutputType::Svg { svg, .. },
+				..
+			}) => {
 				if file_type == FileType::Svg {
 					responses.add(FrontendMessage::TriggerSaveFile { name, content: svg.into_bytes() });
 				} else {
@@ -241,6 +254,52 @@ impl NodeGraphExecutor {
 					let size = (size * scale_factor).into();
 					responses.add(FrontendMessage::TriggerExportImage { svg, name, mime, size });
 				}
+			}
+			#[cfg(feature = "gpu")]
+			TaggedValue::RenderOutput(RenderOutput {
+				data: RenderOutputType::Buffer { data, width, height },
+				..
+			}) if file_type != FileType::Svg => {
+				use image::buffer::ConvertBuffer;
+				use image::{ImageFormat, RgbImage, RgbaImage};
+
+				let Some(image) = RgbaImage::from_raw(width, height, data) else {
+					return Err(format!("Failed to create image buffer for export"));
+				};
+
+				let mut encoded = Vec::new();
+				let mut cursor = std::io::Cursor::new(&mut encoded);
+
+				match file_type {
+					FileType::Png => {
+						let result = if transparent_background {
+							image.write_to(&mut cursor, ImageFormat::Png)
+						} else {
+							let image: RgbImage = image.convert();
+							image.write_to(&mut cursor, ImageFormat::Png)
+						};
+						if let Err(err) = result {
+							return Err(format!("Failed to encode PNG: {err}"));
+						}
+					}
+					FileType::Jpg => {
+						let image: RgbImage = image.convert();
+						let result = image.write_to(&mut cursor, ImageFormat::Jpeg);
+						if let Err(err) = result {
+							return Err(format!("Failed to encode JPG: {err}"));
+						}
+					}
+					FileType::Svg => {
+						return Err(format!("SVG cannot be exported from an image buffer"));
+					}
+				}
+
+				responses.add(FrontendMessage::TriggerSaveFile { name, content: encoded });
+			}
+			_ => {
+				return Err(format!("Incorrect render type for exporting to an SVG ({file_type:?}, {node_graph_output})"));
+			}
+		};
 
 		Ok(())
 	}

editor/src/node_graph_executor/runtime.rs

@@ -7,9 +7,11 @@ use graph_craft::graphene_compiler::Compiler;
 use graph_craft::proto::GraphErrors;
 use graph_craft::wasm_application_io::EditorPreferences;
 use graph_craft::{ProtoNodeIdentifier, concrete};
-use graphene_std::application_io::{ImageTexture, NodeGraphUpdateMessage, NodeGraphUpdateSender, RenderConfig};
+use graphene_std::application_io::{ApplicationIo, ImageTexture, NodeGraphUpdateMessage, NodeGraphUpdateSender, RenderConfig};
 use graphene_std::bounds::RenderBoundingBox;
 use graphene_std::memo::IORecord;
+use graphene_std::ops::Convert;
+use graphene_std::raster_types::Raster;
 use graphene_std::renderer::{Render, RenderParams, SvgRender};
 use graphene_std::renderer::{RenderSvgSegmentList, SvgSegment};
 use graphene_std::table::{Table, TableRow};
@@ -220,16 +222,44 @@ impl NodeRuntime {
 					// Resolve the result from the inspection by accessing the monitor node
 					let inspect_result = self.inspect_state.and_then(|state| state.access(&self.executor));
 
-					let texture = if let Ok(TaggedValue::RenderOutput(RenderOutput {
+					let (result, texture) = match result {
+						Ok(TaggedValue::RenderOutput(RenderOutput {
+							data: RenderOutputType::Texture(image_texture),
+							metadata,
+						})) if render_config.for_export => {
+							let executor = self
+								.editor_api
+								.application_io
+								.as_ref()
+								.unwrap()
+								.gpu_executor()
+								.expect("GPU executor should be available when we receive a texture");
+
+							let raster_cpu = Raster::new_gpu(image_texture.texture).convert(Footprint::BOUNDLESS, executor).await;
+
+							let (data, width, height) = raster_cpu.to_flat_u8();
+
+							(
+								Ok(TaggedValue::RenderOutput(RenderOutput {
+									data: RenderOutputType::Buffer { data, width, height },
+									metadata,
+								})),
+								None,
+							)
+						}
+						Ok(TaggedValue::RenderOutput(RenderOutput {
 							data: RenderOutputType::Texture(texture),
-						..
-					})) = &result
-					{
-						// We can early return becaus we know that there is at most one execution request and it will always be handled last
-						Some(texture.clone())
-					} else {
-						None
+							metadata,
+						})) => (
+							Ok(TaggedValue::RenderOutput(RenderOutput {
+								data: RenderOutputType::Texture(texture.clone()),
+								metadata,
+							})),
+							Some(texture),
+						),
+						r => (r, None),
 					};
+
 					self.sender.send_execution_response(ExecutionResponse {
 						execution_id,
 						result,
@@ -274,18 +304,12 @@ impl NodeRuntime {
 	async fn execute_network(&mut self, render_config: RenderConfig) -> Result<TaggedValue, String> {
 		use graph_craft::graphene_compiler::Executor;
 
-		let result = match self.executor.input_type() {
+		match self.executor.input_type() {
 			Some(t) if t == concrete!(RenderConfig) => (&self.executor).execute(render_config).await.map_err(|e| e.to_string()),
 			Some(t) if t == concrete!(()) => (&self.executor).execute(()).await.map_err(|e| e.to_string()),
 			Some(t) => Err(format!("Invalid input type {t:?}")),
 			_ => Err(format!("No input type:\n{:?}", self.node_graph_errors)),
-		};
-		let result = match result {
-			Ok(value) => value,
-			Err(e) => return Err(e),
-		};
-
-		Ok(result)
+		}
 	}
 
 	/// Updates state data

node-graph/gapplication-io/src/lib.rs

@@ -222,10 +222,6 @@ pub trait GetEditorPreferences {
 pub enum ExportFormat {
 	#[default]
 	Svg,
-	Png {
-		transparent: bool,
-	},
-	Jpeg,
 	Canvas,
 	Texture,
 }

node-graph/graph-craft/src/document/value.rs

@@ -441,11 +441,16 @@ pub enum RenderOutputType {
 	CanvasFrame(SurfaceFrame),
 	#[serde(skip)]
 	Texture(ImageTexture),
+	#[serde(skip)]
+	Buffer {
+		data: Vec<u8>,
+		width: u32,
+		height: u32,
+	},
 	Svg {
 		svg: String,
 		image_data: Vec<(u64, Image<Color>)>,
 	},
-	Image(Vec<u8>),
 }
 
 impl Hash for RenderOutput {

node-graph/gstd/src/render_node.rs

@@ -44,7 +44,6 @@ async fn render_intermediate<'a: 'n, T: 'static + Render + WasmNotSend + Send +
 	data: impl Node<Context<'static>, Output = T>,
 	editor_api: impl Node<Context<'static>, Output = &'a WasmEditorApi>,
 ) -> RenderIntermediate {
-	let mut render = SvgRender::new();
 	let render_params = ctx
 		.vararg(0)
 		.expect("Did not find var args")
@@ -59,9 +58,20 @@ async fn render_intermediate<'a: 'n, T: 'static + Render + WasmNotSend + Send +
 	data.collect_metadata(&mut metadata, footprint, None);
 	let contains_artboard = data.contains_artboard();
 
+	let use_vello = {
+		#[cfg(target_family = "wasm")]
+		{
 			let editor_api = editor_api.eval(None).await;
+			!render_params.for_export && editor_api.editor_preferences.use_vello() && matches!(render_params.render_output_type, graphene_svg_renderer::RenderOutputType::Vello)
+		}
+		#[cfg(not(target_family = "wasm"))]
+		{
+			let _ = editor_api;
+			matches!(render_params.render_output_type, graphene_svg_renderer::RenderOutputType::Vello)
+		}
+	};
 
-	if !render_params.for_export && editor_api.editor_preferences.use_vello() && matches!(render_params.render_output_type, graphene_svg_renderer::RenderOutputType::Vello) {
+	if use_vello {
 		let mut scene = vello::Scene::new();
 
 		let mut context = wgpu_executor::RenderContext::default();
@@ -73,6 +83,8 @@ async fn render_intermediate<'a: 'n, T: 'static + Render + WasmNotSend + Send +
 			contains_artboard,
 		}
 	} else {
+		let mut render = SvgRender::new();
+
 		data.render_svg(&mut render, render_params);
 
 		RenderIntermediate {
@@ -93,11 +105,10 @@ async fn create_context<'a: 'n>(
 
 	let render_output_type = match render_config.export_format {
 		ExportFormat::Svg => RenderOutputTypeRequest::Svg,
-		ExportFormat::Png { .. } => todo!(),
-		ExportFormat::Jpeg => todo!(),
-		ExportFormat::Canvas => RenderOutputTypeRequest::Vello,
 		ExportFormat::Texture => RenderOutputTypeRequest::Vello,
+		ExportFormat::Canvas => RenderOutputTypeRequest::Vello,
 	};
+
 	let render_params = RenderParams {
 		render_mode: render_config.render_mode,
 		hide_artboards: render_config.hide_artboards,
@@ -106,6 +117,7 @@ async fn create_context<'a: 'n>(
 		footprint: Footprint::default(),
 		..Default::default()
 	};
+
 	let ctx = OwnedContextImpl::default()
 		.with_footprint(footprint)
 		.with_real_time(render_config.time.time)
@@ -198,6 +210,7 @@ async fn render<'a: 'n>(
 			if !contains_artboard && !render_params.hide_artboards {
 				background = Color::WHITE;
 			}
+
 			if let Some(surface_handle) = surface_handle {
 				exec.render_vello_scene(&scene, &surface_handle, footprint.resolution, context, background)
 					.await

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

@@ -124,7 +124,7 @@ impl WgpuExecutor {
 				mip_level_count: 1,
 				sample_count: 1,
 				dimension: wgpu::TextureDimension::D2,
-				usage: wgpu::TextureUsages::STORAGE_BINDING | wgpu::TextureUsages::TEXTURE_BINDING,
+				usage: wgpu::TextureUsages::STORAGE_BINDING | wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_SRC,
 				format: VELLO_SURFACE_FORMAT,
 				view_formats: &[],
 			});