Extract brush package import targets

src/assets/brush_package.cpp

@@ -126,4 +126,34 @@ pp::foundation::Result<PpbrExportPaths> plan_ppbr_export_paths(
     return pp::foundation::Result<PpbrExportPaths>::success(std::move(paths));
 }
 
+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)
+{
+    if (data_path.empty()) {
+        return pp::foundation::Result<BrushPackageImageTargetPaths>::failure(
+            pp::foundation::Status::invalid_argument("brush package data path must not be empty"));
+    }
+    if (image_name.empty()) {
+        return pp::foundation::Result<BrushPackageImageTargetPaths>::failure(
+            pp::foundation::Status::invalid_argument("brush package image name must not be empty"));
+    }
+    if (!is_word_extension(image_extension)) {
+        return pp::foundation::Result<BrushPackageImageTargetPaths>::failure(
+            pp::foundation::Status::invalid_argument("brush package image extension contains unsupported characters"));
+    }
+
+    const auto directory = kind == BrushPackageImageKind::brush_tip ? "brushes" : "patterns";
+    const std::string base_path = std::string(data_path) + "/" + directory + "/" + std::string(image_name)
+        + "." + std::string(image_extension);
+
+    return pp::foundation::Result<BrushPackageImageTargetPaths>::success(BrushPackageImageTargetPaths {
+        .image_path = base_path,
+        .thumbnail_path = std::string(data_path) + "/" + directory + "/thumbs/" + std::string(image_name)
+            + "." + std::string(image_extension),
+    });
+}
+
 } // namespace pp::assets

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