Export layer collections through paint renderer

src/paint_renderer/compositor.h

@@ -10,6 +10,7 @@
 #include <cstdint>
 #include <memory>
 #include <span>
+#include <string>
 #include <vector>
 
 namespace pp::paint_renderer {
@@ -155,6 +156,50 @@ struct DocumentFrameEquirectangularPngExportResult {
     std::size_t composited_layer_face_count = 0;
 };
 
+struct DocumentLayerEquirectangularPngExportRequest {
+    const pp::document::CanvasDocument* document = nullptr;
+    std::size_t frame_index = 0;
+    pp::paint::Rgba clear_color {};
+};
+
+struct DocumentLayerEquirectangularPng {
+    std::size_t layer_index = 0;
+    std::string layer_name;
+    pp::renderer::Extent2D face_extent {};
+    pp::renderer::Extent2D equirectangular_extent {};
+    std::vector<std::byte> png;
+    std::uint64_t encoded_bytes = 0;
+    std::size_t face_payload_count = 0;
+    std::size_t composited_layer_face_count = 0;
+};
+
+struct DocumentLayerEquirectangularPngExportResult {
+    std::vector<DocumentLayerEquirectangularPng> layers;
+    std::uint64_t encoded_bytes = 0;
+    std::size_t layer_count = 0;
+};
+
+struct DocumentAnimationFrameEquirectangularPngExportRequest {
+    const pp::document::CanvasDocument* document = nullptr;
+    pp::paint::Rgba clear_color {};
+};
+
+struct DocumentAnimationFrameEquirectangularPng {
+    std::size_t frame_index = 0;
+    pp::renderer::Extent2D face_extent {};
+    pp::renderer::Extent2D equirectangular_extent {};
+    std::vector<std::byte> png;
+    std::uint64_t encoded_bytes = 0;
+    std::size_t face_payload_count = 0;
+    std::size_t composited_layer_face_count = 0;
+};
+
+struct DocumentAnimationFrameEquirectangularPngExportResult {
+    std::vector<DocumentAnimationFrameEquirectangularPng> frames;
+    std::uint64_t encoded_bytes = 0;
+    std::size_t frame_count = 0;
+};
+
 struct DocumentFrameExportReadinessResult {
     RecordedDocumentFrameUploadResult recorded_upload {};
     DocumentFrameFacePngExportResult face_pngs {};
@@ -187,6 +232,13 @@ export_document_frame_equirectangular_png(const DocumentFrameCompositeResult& co
 [[nodiscard]] pp::foundation::Result<DocumentFrameEquirectangularPngExportResult>
 export_document_frame_equirectangular_png(DocumentFrameCompositeRequest request);
 
+[[nodiscard]] pp::foundation::Result<DocumentLayerEquirectangularPngExportResult>
+export_document_layers_equirectangular_pngs(DocumentLayerEquirectangularPngExportRequest request);
+
+[[nodiscard]] pp::foundation::Result<DocumentAnimationFrameEquirectangularPngExportResult>
+export_document_animation_frames_equirectangular_pngs(
+    DocumentAnimationFrameEquirectangularPngExportRequest request);
+
 [[nodiscard]] pp::foundation::Result<DocumentFrameExportReadinessResult> prepare_document_frame_export_readiness(
     DocumentFrameCompositeRequest request);