* http://www.w3.org/TR/SVG11/coords.html#UnitIdentifiers
*
* @param $length String: CSS/SVG length.
+ * @param $viewpoerSize: Float optional scale for percentage units...
* @return Integer: length in pixels
*/
-function wfScaleSVGUnit( $length ) {
+function wfScaleSVGUnit( $length, $viewportSize=512 ) {
static $unitLength = array(
'px' => 1.0,
'pt' => 1.25,
'mm' => 3.543307,
'cm' => 35.43307,
'in' => 90.0,
+ 'em' => 16.0, // fake it?
+ 'ex' => 12.0, // fake it?
'' => 1.0, // "User units" pixels by default
- '%' => 2.0, // Fake it!
);
$matches = array();
if( preg_match( '/^\s*(\d+(?:\.\d+)?)(em|ex|px|pt|pc|cm|mm|in|%|)\s*$/', $length, $matches ) ) {
$length = floatval( $matches[1] );
$unit = $matches[2];
- return round( $length * $unitLength[$unit] );
+ if( $unit == '%' ) {
+ return round( $length * 0.01 * $viewportSize );
+ } else {
+ return round( $length * $unitLength[$unit] );
+ }
} else {
// Assume pixels
return round( floatval( $length ) );
}
class XmlSizeFilter {
+ const DEFAULT_WIDTH = 512;
+ const DEFAULT_HEIGHT = 512;
var $first = true;
- var $width = 256;
- var $height = 256;
+ var $width = self::DEFAULT_WIDTH;
+ var $height = self::DEFAULT_HEIGHT;
function filter( $name, $attribs ) {
if( $this->first ) {
+ $defaultWidth = self::DEFAULT_WIDTH;
+ $defaultHeight = self::DEFAULT_HEIGHT;
+ $aspect = 1.0;
+ $width = null;
+ $height = null;
+
+ if( isset( $attribs['viewBox'] ) ) {
+ // min-x min-y width height
+ $viewBox = preg_split( '/\s+/', trim( $attribs['viewBox'] ) );
+ if( count( $viewBox ) == 4 ) {
+ $viewWidth = wfScaleSVGUnit( $viewBox[2] );
+ $viewHeight = wfScaleSVGUnit( $viewBox[3] );
+ if( $viewWidth > 0 && $viewHeight > 0 ) {
+ $aspect = $viewWidth / $viewHeight;
+ $defaultHeight = $defaultWidth / $aspect;
+ }
+ }
+ }
if( isset( $attribs['width'] ) ) {
- $this->width = wfScaleSVGUnit( $attribs['width'] );
+ $width = wfScaleSVGUnit( $attribs['width'], $defaultWidth );
}
if( isset( $attribs['height'] ) ) {
- $this->height = wfScaleSVGUnit( $attribs['height'] );
+ $height = wfScaleSVGUnit( $attribs['height'], $defaultHeight );
+ }
+
+ if( !isset( $width ) && !isset( $height ) ) {
+ $width = $defaultWidth;
+ $height = $width / $aspect;
+ } elseif( isset( $width ) && !isset( $height ) ) {
+ $height = $width / $aspect;
+ } elseif( isset( $height ) && !isset( $width ) ) {
+ $width = $height * $aspect;
}
+
+ $this->width = $width;
+ $this->height = $height;
$this->first = false;
}
}