graphics/rounded_rectangle

<?php

/* $Id: rounded_rectangle.php,v 1.1 2009/07/29 12:52:11 rp Exp $

 * Rounded rectangles:

 * Create some rectangle with the corners being rounded

 *

 * Create two simple rectangles using the linejoin parameter for rounded

 * corners. Define a path for a rectangle with corners rounded by a given

 * radius. Create three rhombuses using the linejoin and linecap parameters for

 * rounded corners.

 *

 * Required software: PDFlib Lite/PDFlib/PDFlib+PDI/PPS 7

 * Required data: none

 */

/* This is where the data files are. Adjust as necessary. */

$searchpath = "../input";

$outfile = "";

$title = "Rounded Rectangle";

$x = 50; $y = 100; $radius = 50; $width = 400; $height = 300;

try {

    $p = new pdflib();

    $p->set_parameter("SearchPath", $searchpath);

    /* This means we must check return values of load_font() etc. */

    $p->set_parameter("errorpolicy", "return");

    $p->set_parameter("textformat", "utf8");

    if ($p->begin_document($outfile, "") == 0)

        throw new Exception("Error: " . $p->get_errmsg());

    $p->set_info("Creator", "PDFlib Cookbook");

    $p->set_info("Title", $title );

    $font = $p->load_font("Helvetica", "unicode", "");

    if ($font == 0)

    throw new Exception("Error: " . $p->get_errmsg());

    /* Start page 1 */

    $p->begin_page_ext(0, 0, "width=a4.width height=a4.height");

    $p->setlinewidth(15.0);

    /* Red rectangle */

    $p->setcolor("stroke", "rgb", 1.0, 0.0, 0.0, 0.0);

    $p->rect(100, 700, 100, 100);

    $p->stroke();

    $p->fit_textline("Simple rectangle", 250, 750, "font=" . $font .

        " fontsize=16");

    /* Red rectangle with the "linejoin" parameter set */

    $p->setlinejoin(1);

    $p->rect(100, 500, 100, 100);

    $p->stroke();

    $p->fit_textline("Simple rectangle with linejoin=1", 250, 550,

        "font=" . $font . " fontsize=16");

    /* Define a path for a rectangle with corners rounded by a given radius.

     * Start from the lower left corner and proceed counterclockwise.

     */

    $p->moveto($x + $radius, $y);

    /* Start of the arc segment in the lower right corner */

    $p->lineto($x + $width - $radius, $y);

    /* Arc segment in the lower right corner */

    $p->arc($x + $width - $radius, $y + $radius, $radius, 270, 360);

    /* Start of the arc segment in the upper right corner */

    $p->lineto($x + $width, $y + $height - $radius );

    /* Arc segment in the upper right corner */

    $p->arc($x + $width - $radius, $y + $height - $radius, $radius, 0, 90);

    /* Start of the arc segment in the upper left corner */

    $p->lineto($x + $radius, $y + $height);

    /* Arc segment in the upper left corner */

    $p->arc($x + $radius, $y + $height - $radius, $radius, 90, 180);

    /* Start of the arc segment in the lower left corner */

    $p->lineto($x , $y + $radius);

    /* Arc segment in the lower left corner */

    $p->arc($x + $radius, $y + $radius, $radius, 180, 270);

    $p->stroke();

    $p->fit_textline("Rectangle with corners rounded by a defined radius",

        70, 60, "font=" . $font . " fontsize=16");

    /* Reset the linejoin parameter */

    $p->setlinejoin(0);

    $p->end_page_ext("");

    /* Start page 2 */

    $p->begin_page_ext(0, 0, "width=a4.width height=a4.height");

    $p->setlinewidth(15.0);

    /* Blue rhombus without the "linejoin" parameter set */

    $p->setcolor("stroke", "rgb", 0.0, 0.0, 1.0, 0.0);

    $p->moveto(100, 700);     // left corner

    $p->lineto(200, 800);     // upper corner

    $p->lineto(300, 700);     // right corner

    $p->lineto(200, 600);     // lower corner

    $p->lineto(100, 700);     // left corner

    $p->stroke();

    $p->fit_textline("Rhombus", 320, 695, "font=" . $font . " fontsize=16");

    /* Blue rhombus with the "linejoin" parameter set */

    $p->setlinejoin(1);

    $p->moveto(100, 450);     // left corner

    $p->lineto(200, 550);     // upper corner

    $p->lineto(300, 450);     // right corner

    $p->lineto(200, 350);     // lower corner

    $p->lineto(100, 450);     // left corner

    $p->stroke();

    $p->fit_textline("Rhombus with linejoin=1", 320, 445, "font=" .

        $font . " fontsize=16");

    /* blue rhombus with linejoin and linecap parameter */

    $p->setlinecap(1);

    $p->moveto(100, 200);     // left corner

    $p->lineto(200, 300);     // upper corner

    $p->lineto(300, 200);     // right corner

    $p->lineto(200, 100);     // lower corner

    $p->lineto(100, 200);     // left corner

    $p->stroke();

    $p->fit_textline("Rhombus with linejoin=1", 320, 195, "font=" . $font .

        " fontsize=16");

    $p->fit_textline("and linecap=1", 320, 175, "font=" . $font .

        " fontsize=16");

    $p->end_page_ext("");

    $p->end_document("");

    $buf = $p->get_buffer();

    $len = strlen($buf);

    header("Content-type: application/pdf");

    header("Content-Length: $len");

    header("Content-Disposition: inline; filename=rounded_rectangle.pdf");

    print $buf;

} catch (PDFlibException $e){

    die("PDFlib exception occurred:\n" .

        "[" . $e->get_errnum() . "] " . $e->get_apiname() .

        ": " . $e->get_errmsg() . "\n");

} catch (Exception $e) {

    die($e->getMessage());

}

$p=0;

?>