Headless pictures draw on the GPU, with the viewport's pipelines (CPU rasterizer as last tier) (#1555)

Thanks @jyviko.

crates/render/src/lib.rs

@@ -4,6 +4,7 @@
 #![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::unimplemented, clippy::todo, clippy::unreachable)]
 #![forbid(unsafe_code)]
 
+mod analysis;
 mod backend;
 mod camera;
 mod curve_display;
@@ -11,6 +12,7 @@ pub mod job;
 pub mod lighting;
 mod product;
 mod raster;
+mod scene;
 pub mod studio;
 pub mod surface;
 pub mod texture_input;
@@ -18,6 +20,7 @@ pub mod texture_interpolation;
 pub mod texture_lod;
 pub mod texture_sampling;
 
+pub use analysis::{AnalysisColors, AnalysisMode, SceneAnalysis};
 pub use backend::{
     Availability, BackendDescriptor, BackendId, ExecutorDescriptor, ExecutorId, MAX_RENDER_ID_BYTES, RenderFeature, RenderFormat, RenderLimits,
     RenderMode, RenderOperation, RenderPolicy, RenderProfile, RenderRequest, ResolveError, ResolvedRequest, ScratchLayout, builtin_backend,
@@ -26,4 +29,5 @@ pub use backend::{
 pub use camera::{Camera, CameraAnim, Mat4, Quat, StandardView, UpAxis, ease_in_out};
 pub use curve_display::{PixelCurveView, SampledPath, SamplingBudget, SamplingQuality, sample_segment, sample_segment_unclipped};
 pub use product::{FaceAppearance, ProductMesh, ProductScene};
-pub use raster::{Canvas, Rgb, SECTION_CAP, Scene, SceneLine, SceneMesh, png, render, render_png, render_transparent};
+pub use raster::{Canvas, render, render_png, render_transparent};
+pub use scene::{Rgb, SECTION_CAP, Scene, SceneLine, SceneMesh, png};