Extract brush package import targets

src/assets/brush_package.h

@@ -19,11 +19,21 @@ enum class PpbrDataDirectoryPolicy {
     override_directory,
 };
 
+enum class BrushPackageImageKind {
+    brush_tip,
+    pattern,
+};
+
 struct PpbrHeader {
     std::uint16_t major = 0;
     std::uint16_t minor = 0;
 };
 
+struct BrushPackageImageTargetPaths {
+    std::string image_path;
+    std::string thumbnail_path;
+};
+
 struct PpbrExportPaths {
     std::string package_path;
     std::string directory;
@@ -50,4 +60,10 @@ struct PpbrExportPaths {
     bool export_data,
     PpbrDataDirectoryPolicy data_directory_policy);
 
+[[nodiscard]] pp::foundation::Result<BrushPackageImageTargetPaths> plan_brush_package_image_target_paths(
+    std::string_view data_path,
+    BrushPackageImageKind kind,
+    std::string_view image_name,
+    std::string_view image_extension);
+
 } // namespace pp::assets