GeezerVison

void
pango_matrix_transform_pixel_rectangle (
  const PangoMatrix* matrix,
  PangoRectangle* rect
)

First transforms the rect using matrix, then calculates the bounding box of the transformed rectangle.

This function is useful for example when you want to draw a rotated PangoLayout to an image buffer, and want to know how large the image should be and how much you should shift the layout when rendering.

For better accuracy, you should use pango_matrix_transform_rectangle() on original rectangle in Pango units and convert to pixels afterward using pango_extents_to_pixels()‘s first argument.

Available since: 1.16

matrix

Type: PangoMatrix

A PangoMatrix.

The argument can be NULL.

rect

Type: PangoRectangle

In/out bounding box in device units.

The argument will be modified by the function.

The argument can be NULL.

The caller of the method takes ownership of the returned data, and is responsible for freeing it.