Thanks! I will try later. <table width=100%> <tr valign=top> <td>From: <td>Bertram Felgenhauer <bertram.felgenhauer@googlemail.com> <tr valign=top> <td>To: <td>cairo@cairographics.org <tr valign=top> <td>Date: <td>21/01/2009 22:55 <tr valign=top> <td>Subject: <td>Re: [cairo] how to scale an image - correction</table> <hr noshade> <tt>Kelvin Cheng wrote: > Hi, > This is a correction to my previous question. The cairo_matrix_init_scale > should be 2.0 instead of 0.5. > Even when it is 2.0,   the code still does reduce the image by 50%. Any > idea ? Isn't that what you wanted? > I am trying to scale an image by 50 %. Try this:    cairo_save(cr);    cairo_translate(cr, target_x, target_y);    cairo_scale(cr, 0.5, 0.5);    // note: it's important to set the source after setting up the    // user space transformation.    cairo_set_source_surface(cr, local_surf, 0, 0);    cairo_paint(cr);    cairo_restore(cr); > I tried with the following code but it does not work: > >         cairo_save(cr); >         cairo_set_source_surface(cr, local_surf, target_x, target_y); > >         // these 2 lines are used for scaling >         cairo_pattern_set_matrix (cairo_get_source(board->cr), &matrix); What is 'matrix' here? In any case, the pattern matrix transforms coordinates from user space to pattern space; multiplying the coordinates by 2 will result in the appearance of the pattern to shrink to 50% its original size. HTH, Bertram _______________________________________________ cairo mailing list cairo@cairographics.org </tt><a href=http://lists.cairographics.org/mailman/listinfo/cairo><tt>http://lists.cairographics.org/mailman/listinfo/cairo</tt></a><tt> </tt>