Added snb2swf.php, the core conversion script. Uses php ming library.

snb2swf.php

@@ -0,0 +1,114 @@
+<?php
+//http://www.gazbming.com/ 
+// Author: [email protected]
+// Add one frame for every tick
+// If there is an event at that time, then update the frame 
+//
+// Read the xml file given as argument
+// if "<stroke .*>" matches then
+// if "</stroke> matches then close current stroke
+// inside stroke look for event
+// <event .*>
+// read that line and extract x=".*"
+//
+// Timing calculation
+// nextFrame until 
+// 1 frame for each tick
+// else 1 frame for ticks_per_frame 
+// -- Main --
+// -- Commandline --
+if ($argc == 1)
+{
+	die("Usage: script <datafile> <scale_factor(eg. 0.5)>");
+}
+$filename = $argv[1];
+$scale_xy = $argv[2];
+
+$fh = fopen($filename,"r") or exit("Unable to open file.");
+
+// some typical movie variables
+Ming_setScale(20.0000000);
+ming_useswfversion(4);
+$movie=new SWFMovie();
+# 550 x 400
+$movie->setDimension(800,600);
+$movie->setBackground(rand(0,0xFF),rand(0,0xFF),rand(0,0xFF));
+$movie->setRate(30); 
+
+// -- Read file line by line --
+// Parameters
+$ticks_per_frame = 5;
+// Initializations
+$lx = 0; $ly = 0; $lt = 0;
+$pattern_event = '/<event x="(.*)" y="(.*)" pressure="(.*)" event_time="(.*)"\/>/';
+$pattern_stroke = '/<stroke type="(.*)" color="(.*)" alpha="(.*)" width="(.*)" meta_state="(.*)">/';
+// First frame
+$flag_start_stroke = 1;
+$flag_start_movie = 1;
+
+while(!feof($fh))
+{
+	$line = fgets($fh);
+
+	// If stroke
+	preg_match($pattern_stroke, $line, $matches);
+	if (count($matches)==6)
+	{
+		$color = $matches[2];
+		$width = $matches[4];
+		$flag_start_stroke = 1;
+	}
+
+	// If event
+	preg_match($pattern_event, $line, $matches);
+	if (count($matches)==5)
+	{
+		$x = $matches[1];
+		$x = $x * $scale_xy;
+
+		$y = $matches[2];
+		$y = $y * $scale_xy;
+
+		$t = $matches[4];
+
+		$s = new SWFShape();
+
+		if ($flag_start_stroke == 1)
+		{
+			$flag_start_stroke = 0;
+		}
+		else
+		{
+			$s->movePenTo($lx, $ly);
+			$s->setLine(4, 0, 0, 0);
+			$s->drawLineTo($x, $y);
+		}
+
+		// Add enough frames before adding new shape
+		if ($flag_start_movie == 1)
+		{
+			$flag_start_movie = 0;
+			$lt = $t;
+		}
+
+		$delta_t = $t - $lt;
+		$frames_to_pad = round($delta_t / $ticks_per_frame);
+
+		$movie->nextFrame();
+		for($i=0;$i<$frames_to_pad-1;$i++) $movie->nextFrame();
+
+		$movie->add($s);
+
+		$lx = $x;
+		$ly = $y;
+		$lt = $t;
+
+	}
+}
+fclose($fh);
+
+// save swf with same name as filename
+$swfname = basename(__FILE__,".php");
+$movie->save("$swfname.swf");
+
+?>