Module vector 

Vector data (VectorObjectList.VectorData, an external chunk).

Vector layers store no pixels; CSP draws them from this data when it opens the file. Big endian (spec: docs/spec/05-vector.md):

u32 0, u32 length of the objects
object × n:
  header (header_size bytes)
    +0  u32 header_size (76, 88, 92, 96) +4  u32 72
    +8  u32 point_size (88, 104)       +12 u32 88
    +16 u32 point_count                +20 u32 flags
    +24 i32 bbox x0, y0, x1, y1 (layer pixels)
    +40 u32 main colour R, G, B        +52 u32 sub colour R, G, B
    +64 f64 opacity (1.0)
    +72 …  brush style ids (u32 × 1–3), the brush size (f64), u32
  point × point_count (point_size bytes)
    +0 f64 x  +8 f64 y  +16 i32 bbox x0, y0, x1, y1  +32 u32 flags
    +36 … f32 values (pressure, width ratio, …), +88 f64 x, y (104-byte points)

Coordinates are layer pixels; add LayerOffsetX/Y for the canvas. The parser keeps every byte, so unknown fields are written back unchanged.

Structs

Point

Typed view of one point.

VectorData

All objects of one VectorData payload.

VectorObject

One stroke or shape. header and every point keep their raw bytes.

Constants

FLAG_CLOSED

Header flag (+20) of a closed shape.