<?php
    // sample to print out some shapes as png picture. 
    // to view source call with: gd_shapes.php?viewsource=1
    // call f.e. with: gd_shapes.php?b=4&interlace=1
    // v0.14 20-Sep-2004, by G. Knauf <efash@gmx.net>
    if ($_GET['viewsource']) {
        echo highlight_string(file_get_contents($_SERVER['SCRIPT_FILENAME']));
        die;
    }
    extension_loaded('gd') or die ("Error: GD extension not loaded!"); 
    $im = @ImageCreate (300, 300);
    $white = ImageColorAllocate ($im, 255, 255, 255);
    $black = ImageColorAllocate ($im, 0, 0, 0);
    $red = ImageColorAllocate ($im, 255, 0, 0);
    $blue = ImageColorAllocate ($im, 0, 0, 255);
    $yellow = ImageColorAllocate ($im, 255, 250, 205);
    $green = ImageColorAllocate ($im, 0, 255, 0);
    ImageColorTransparent($im, $white);		# white color is transparent
    if ($_GET['interlace'])
        ImageInterlace($im, 1);				# cool venetian blinds effect

    # Create a flat wide rectangle paintbrush
    $brush = @ImageCreate (10,10);
    $white = ImageColorAllocate ($brush, 255, 255, 255);
    $black = ImageColorAllocate ($brush, 0, 0, 0);
    ImageColorTransparent($brush, $white);		# white color is transparent
    ImageFilledRectangle($brush, 0, 0, 5, 2, $black); # a black rectangle

    # Draw a friendly title (ha!)
    define ("gdTinyFont", 1);
    define ("gdSmallFont", 2);
    define ("gdMediumBoldFont", 3);
    define ("gdLargeFont", 4);
    ImageString($im, gdLargeFont,150,10,"Hello world!",$red);
    ImageString($im, gdSmallFont,150,28,"Goodbye cruel world!",$blue);
    ImageStringUp($im, gdTinyFont,280,250,"I'm climbing the wall!",$green);
    ImageCharUp($im, gdMediumBoldFont,280,280,"Q",$black);

    # Draw an oval
    ImageSetBrush ($im, $brush);
    ImageArc ($im, 100, 100, 100, 150, 0, 360, IMG_COLOR_BRUSHED);

    $poly = array (30,30, 100,10, 190,290, 30,290);
    ImagePolygon ( $im, $poly, 4, IMG_COLOR_BRUSHED);

    ImageFill ($im,132,62,$blue);
    ImageFill ($im,100,70,$red);
    ImageFill ($im,40,40,$yellow);

    # print the image to stdout
    Header("Content-type: image/png");
    ImagePng ($im);
    ImageDestroy ($im);
?>
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