pdf_concatDescriptionThis is a slightly more low-level version of other the transformation functions including pdf_scale() , pdf_rotate() , and pdf_translate() . This function differs from pdf_setmatrix() as each transformation is added or concatentated to the previous transformation. With pdf_setmatrix() , each transformation was reset after the object was drawn. When applying several transformations, it is always a good idea to specify them in the correct order so the results are more predictable. The best way to do multiple translations is to first translate, then rotate and finaly scale and skew. In pdf_concat() , the transformation matrix is specified by six parameters, combinations of which affect the amount of translation that occurs. Different pairs of numbers cause each trnasformation. For an explanation of how each transformation parameter works, see pdf_setmatrix() . ExampleExample 927. Display matrix transformations <?php // create new document $pdf = pdf_new(); pdf_open_file($pdf); pdf_begin_page($pdf, 500, 700); $font = pdf_findfont($pdf, "Courier", "host", 0); pdf_setfont($pdf, $font, 50); // display as normal pdf_set_text_pos($pdf, 10, 10); pdf_show($pdf, "Norm"); // translate pdf_setmatrix($pdf, 1, 0, 0, 1, 100, 100); pdf_set_text_pos($pdf, 10, 10); pdf_show($pdf, "Trans"); // rotate pdf_concat($pdf, 0.7, 0.7, -0.7, 0.7, 0, 0); pdf_set_text_pos($pdf, 20, 20); pdf_show($pdf, "Rotate"); // scale pdf_concat($pdf, 2, 0, 0, 2, 0, 0); pdf_set_text_pos($pdf, 25, 25); pdf_show($pdf, "Scale"); // skew pdf_concat($pdf, 1, 0.58, 0.58, 1, 0, 0); pdf_set_text_pos($pdf, 20, 20); pdf_show($pdf, "Skew"); pdf_end_page($pdf); pdf_close($pdf); // display the PDF document $data = pdf_get_buffer($pdf); header("Content-type: application/pdf"); header("Content-disposition: inline; filename=test.pdf"); header("Content-length: " . strlen($data)); echo $data; ?>
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
This material may be distributed only subject to the terms and conditions set forth
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