Set the stroke / line color of an annotation

Wraps FPDFAnnot_SetColor with type = FPDFANNOT_COLORTYPE_Color. Composite setter — pass color = c(r, g, b) (or c(r, g, b, a)) for a full replacement, or individual red / green / blue / alpha arguments for a partial overlay on the current color. 0-255 ints and 0-1 doubles are auto-detected per ADR-018 §5.

Usage

pdf_annot_set_color(
  annot,
  color = NULL,
  red = NULL,
  green = NULL,
  blue = NULL,
  alpha = NULL
)

Arguments

annot

A pdfium_annot handle. Parent doc must be readwrite.

color

Length-3 (RGB) or length-4 (RGBA) numeric vector, or NULL to keep the current color and rely on the per-channel overrides.

red, green, blue, alpha

Individual channel overrides.

Value

Invisibly returns the parent pdfium_doc.

See also

pdf_annot_color(), pdf_annot_set_interior_color().