THPDFRectangle Record

Carries a PDF rectangle as four user-space coordinates shared by page box, bounds, and highlight APIs

Declaration

THPDFRectangle= record
  Left, Top, Right, Bottom: Extended;
end;

HPDFTypes

Field	Purpose
`Left`	Left user-space X coordinate
`Top`	Top user-space Y coordinate
`Right`	Right user-space X coordinate
`Bottom`	Bottom user-space Y coordinate

Records may hold either corner orientation; call HPDFNormalizeRect before geometry math so Left < Right and Bottom < Top
THotPDF page box helpers fill both this record and a four-Extended parameter form, so either style works
The viewer model normalizes highlight rectangles against this record and clamps them to the page MediaBox before storing