status = page:Concat(a, b, c, d, x, y)

For example, if you want to rotate the coordinate system of the page by 45 degrees, use page:Concat() as follows:

Local rad1 = 45 / 180 * #PI page:Concat(Cos(rad1),Sin(rad1),-Sin(rad1),Cos(rad1),220,350)

To change the coordinate system of the page to 300 dpi, use page:Concat() as follows:

page:Concat(72.0 / 300.0, 0, 0, 72.0 / 300.0, 0, 0)

Invoke page:GSave() before page:Concat(). Then the change by page:Concat() can be restored by invoking page:GRestore().

; save the current graphics states page:GSave(page) ; concatenate the transformation matrix page:Concat(72.0 / 300.0, 0, 0, 72.0 / 300.0, 0, 0) ; show text on the translated coordinates page:BeginText() page:MoveTextPos(50, 100) page:ShowText("Text on the translated coordinates") page:EndText(page) ; restore the graphics states page:GRestore()

An application can invoke page:GSave() when the graphics mode of the page is in #HPDF_GMODE_PAGE_DESCRIPTION.

Returns #HPDF_OK on success. Otherwise, returns an error code and the error handler is invoked.

a

scaling x coordinate

b

rotation x coordinate

c

rotation y coordinate

d

scaling y coordinate

x

translation x coordinate

y

translation y coordinate

status

status code