Summarize PPI project bodies

src/assets/ppi_header.h

@@ -9,6 +9,11 @@
 namespace pp::assets {
 
 constexpr std::size_t ppi_header_size = 40;
+constexpr std::uint32_t max_ppi_canvas_dimension = 131072;
+constexpr std::uint32_t max_ppi_layer_count = 1024;
+constexpr std::uint32_t max_ppi_frame_count = 100000;
+constexpr std::size_t max_ppi_layer_name_length = 128;
+constexpr std::uint64_t max_ppi_face_payload_bytes = 1024ULL * 1024ULL * 1024ULL;
 
 struct PpiVersion {
     std::uint32_t major = 0;
@@ -42,6 +47,22 @@ struct PpiProjectLayout {
     std::size_t body_bytes = 0;
 };
 
+struct PpiBodySummary {
+    std::uint32_t width = 0;
+    std::uint32_t height = 0;
+    std::uint32_t layer_count = 0;
+    std::uint32_t declared_frame_count = 0;
+    std::uint32_t total_layer_frames = 0;
+    std::uint32_t dirty_face_count = 0;
+    std::uint64_t compressed_face_bytes = 0;
+    std::uint32_t info_bytes = 0;
+};
+
+struct PpiProjectSummary {
+    PpiProjectLayout layout;
+    PpiBodySummary body;
+};
+
 [[nodiscard]] pp::foundation::Result<PpiHeaderInfo> parse_ppi_header(
     std::span<const std::byte> bytes) noexcept;
 
@@ -50,4 +71,11 @@ struct PpiProjectLayout {
 [[nodiscard]] pp::foundation::Result<PpiProjectLayout> parse_ppi_project_layout(
     std::span<const std::byte> bytes) noexcept;
 
+[[nodiscard]] pp::foundation::Result<PpiBodySummary> parse_ppi_body_summary(
+    PpiHeaderInfo header,
+    std::span<const std::byte> body) noexcept;
+
+[[nodiscard]] pp::foundation::Result<PpiProjectSummary> parse_ppi_project_summary(
+    std::span<const std::byte> bytes) noexcept;
+
 }