<?php
-/*
+/**
* RandomImageGenerator -- does what it says on the tin.
* Requires Imagick, the ImageMagick library for PHP, or the command line equivalent (usually 'convert').
*
* Because MediaWiki tests the uniqueness of media upload content, and filenames, it is sometimes useful to generate
* files that are guaranteed (or at least very likely) to be unique in both those ways.
- * This generates a number of filenames with random names and random content (colored circles)
+ * This generates a number of filenames with random names and random content (colored triangles)
*
* It is also useful to have fresh content because our tests currently run in a "destructive" mode, and don't create a fresh new wiki for each
* test run.
class RandomImageGenerator {
private $dictionaryFile;
- private $minWidth = 400;
- private $maxWidth = 800;
- private $minHeight = 400;
- private $maxHeight = 800;
- private $circlesToDraw = 5;
- private $imageWriteMethod;
+ private $minWidth = 400 ;
+ private $maxWidth = 800 ;
+ private $minHeight = 400 ;
+ private $maxHeight = 800 ;
+ private $shapesToDraw = 5 ;
+
+ /**
+ * Orientations: 0th row, 0th column, EXIF orientation code, rotation 2x2 matrix that is opposite of orientation
+ * n.b. we do not handle the 'flipped' orientations, which is why there is no entry for 2, 4, 5, or 7. Those
+ * seem to be rare in real images anyway
+ * (we also would need a non-symmetric shape for the images to test those, like a letter F)
+ */
+ private static $orientations = array(
+ array(
+ '0thRow' => 'top',
+ '0thCol' => 'left',
+ 'exifCode' => 1,
+ 'counterRotation' => array( array( 1, 0 ), array( 0, 1 ) )
+ ),
+ array(
+ '0thRow' => 'bottom',
+ '0thCol' => 'right',
+ 'exifCode' => 3,
+ 'counterRotation' => array( array( -1, 0 ), array( 0, -1 ) )
+ ),
+ array(
+ '0thRow' => 'right',
+ '0thCol' => 'top',
+ 'exifCode' => 6,
+ 'counterRotation' => array( array( 0, 1 ), array( 1, 0 ) )
+ ),
+ array(
+ '0thRow' => 'left',
+ '0thCol' => 'bottom',
+ 'exifCode' => 8,
+ 'counterRotation' => array( array( 0, -1 ), array( -1, 0 ) )
+ )
+ );
+
public function __construct( $options = array() ) {
- foreach ( array( 'dictionaryFile', 'minWidth', 'minHeight', 'maxHeight', 'circlesToDraw' ) as $property ) {
+ foreach ( array( 'dictionaryFile', 'minWidth', 'minHeight', 'maxWidth', 'maxHeight', 'shapesToDraw' ) as $property ) {
if ( isset( $options[$property] ) ) {
$this->$property = $options[$property];
}
// find the dictionary file, to generate random names
if ( !isset( $this->dictionaryFile ) ) {
- foreach ( array( '/usr/share/dict/words', '/usr/dict/words' ) as $dictionaryFile ) {
+ foreach ( array(
+ '/usr/share/dict/words',
+ '/usr/dict/words',
+ dirname( __FILE__ ) . '/words.txt' )
+ as $dictionaryFile ) {
if ( is_file( $dictionaryFile ) and is_readable( $dictionaryFile ) ) {
$this->dictionaryFile = $dictionaryFile;
break;
*/
function getImageWriteMethod( $format ) {
global $wgUseImageMagick, $wgImageMagickConvertCommand;
- if ( $format === 'svg' ) {
+ if ( $format === 'svg' ) {
return 'writeSvg';
} else {
// figure out how to write images
- if ( class_exists( 'Imagick' ) ) {
+ global $wgExiv2Command;
+ if ( class_exists( 'Imagick' ) && $wgExiv2Command && is_executable( $wgExiv2Command ) ) {
return 'writeImageWithApi';
} elseif ( $wgUseImageMagick && $wgImageMagickConvertCommand && is_executable( $wgImageMagickConvertCommand ) ) {
return 'writeImageWithCommandLine';
- }
+ }
}
throw new Exception( "RandomImageGenerator: could not find a suitable method to write images in '$format' format" );
}
$diagonalLength = sqrt( pow( $spec['width'], 2 ) + pow( $spec['height'], 2 ) );
$draws = array();
- for ( $i = 0; $i <= $this->circlesToDraw; $i++ ) {
+ for ( $i = 0; $i <= $this->shapesToDraw; $i++ ) {
$radius = mt_rand( 0, $diagonalLength / 4 );
+ if ( $radius == 0 ) {
+ continue;
+ }
$originX = mt_rand( -1 * $radius, $spec['width'] + $radius );
$originY = mt_rand( -1 * $radius, $spec['height'] + $radius );
$angle = mt_rand( 0, ( 3.141592/2 ) * $radius ) / $radius;
*/
static function shapePointsToString( $shape ) {
$points = array();
- foreach ( $shape as $point ) {
+ foreach ( $shape as $point ) {
$points[] = $point['x'] . ',' . $point['y'];
}
return join( " ", $points );
/**
* Based on image specification, write a very simple SVG file to disk.
* Ignores the background spec because transparency is cool. :)
- * @param $spec: spec describing background and circles to draw
+ * @param $spec: spec describing background and shapes to draw
* @param $format: file format to write (which is obviously always svg here)
* @param $filename: filename to write to
*/
- public function writeSvg( $spec, $format, $filename ) {
+ public function writeSvg( $spec, $format, $filename ) {
$svg = new SimpleXmlElement( '<svg/>' );
$svg->addAttribute( 'xmlns', 'http://www.w3.org/2000/svg' );
- $svg->addAttribute( 'version', '1.1' );
- $svg->addAttribute( 'width', $spec['width'] );
- $svg->addAttribute( 'height', $spec['height'] );
+ $svg->addAttribute( 'version', '1.1' );
+ $svg->addAttribute( 'width', $spec['width'] );
+ $svg->addAttribute( 'height', $spec['height'] );
$g = $svg->addChild( 'g' );
foreach ( $spec['draws'] as $drawSpec ) {
$shape = $g->addChild( 'polygon' );
- $shape->addAttribute( 'fill', $drawSpec['fill'] );
+ $shape->addAttribute( 'fill', $drawSpec['fill'] );
$shape->addAttribute( 'points', self::shapePointsToString( $drawSpec['shape'] ) );
};
if ( ! $fh = fopen( $filename, 'w' ) ) {
* @param $filename: filename to write to
*/
public function writeImageWithApi( $spec, $format, $filename ) {
+ // this is a hack because I can't get setImageOrientation() to work. See below.
+ global $wgExiv2Command;
+
$image = new Imagick();
+ /**
+ * If the format is 'jpg', will also add a random orientation -- the image will be drawn rotated with triangle points
+ * facing in some direction (0, 90, 180 or 270 degrees) and a countering rotation should turn the triangle points upward again
+ */
+ $orientation = self::$orientations[0]; // default is normal orientation
+ if ( $format == 'jpg' ) {
+ $orientation = self::$orientations[ array_rand( self::$orientations ) ];
+ $spec = self::rotateImageSpec( $spec, $orientation['counterRotation'] );
+ }
+
$image->newImage( $spec['width'], $spec['height'], new ImagickPixel( $spec['fill'] ) );
foreach ( $spec['draws'] as $drawSpec ) {
}
$image->setImageFormat( $format );
+
+ // this doesn't work, even though it's documented to do so...
+ // $image->setImageOrientation( $orientation['exifCode'] );
+
$image->writeImage( $filename );
+
+ // because the above setImageOrientation call doesn't work... nor can I get an external imagemagick binary to do this either...
+ // hacking this for now (only works if you have exiv2 installed, a program to read and manipulate exif)
+ if ( $wgExiv2Command ) {
+ $cmd = wfEscapeShellArg( $wgExiv2Command )
+ . " -M "
+ . wfEscapeShellArg( "set Exif.Image.Orientation " . $orientation['exifCode'] )
+ . " "
+ . wfEscapeShellArg( $filename );
+
+ $retval = 0;
+ $err = wfShellExec( $cmd, $retval );
+ if ( $retval !== 0 ) {
+ print "Error with $cmd: $retval, $err\n";
+ }
+ }
+ }
+
+ /**
+ * Given an image specification, produce rotated version
+ * This is used when simulating a rotated image capture with EXIF orientation
+ * @param $spec Object returned by getImageSpec
+ * @param $matrix 2x2 transformation matrix
+ * @return transformed Spec
+ */
+ private static function rotateImageSpec( &$spec, $matrix ) {
+ $tSpec = array();
+ $dims = self::matrixMultiply2x2( $matrix, $spec['width'], $spec['height'] );
+ $correctionX = 0;
+ $correctionY = 0;
+ if ( $dims['x'] < 0 ) {
+ $correctionX = abs( $dims['x'] );
+ }
+ if ( $dims['y'] < 0 ) {
+ $correctionY = abs( $dims['y'] );
+ }
+ $tSpec['width'] = abs( $dims['x'] );
+ $tSpec['height'] = abs( $dims['y'] );
+ $tSpec['fill'] = $spec['fill'];
+ $tSpec['draws'] = array();
+ foreach( $spec['draws'] as $draw ) {
+ $tDraw = array(
+ 'fill' => $draw['fill'],
+ 'shape' => array()
+ );
+ foreach( $draw['shape'] as $point ) {
+ $tPoint = self::matrixMultiply2x2( $matrix, $point['x'], $point['y'] );
+ $tPoint['x'] += $correctionX;
+ $tPoint['y'] += $correctionY;
+ $tDraw['shape'][] = $tPoint;
+ }
+ $tSpec['draws'][] = $tDraw;
+ }
+ return $tSpec;
+ }
+
+ /**
+ * Given a matrix and a pair of images, return new position
+ * @param $matrix: 2x2 rotation matrix
+ * @param $x: x-coordinate number
+ * @param $y: y-coordinate number
+ * @return Array transformed with properties x, y
+ */
+ private static function matrixMultiply2x2( $matrix, $x, $y ) {
+ return array(
+ 'x' => $x * $matrix[0][0] + $y * $matrix[0][1],
+ 'y' => $x * $matrix[1][0] + $y * $matrix[1][1]
+ );
}
* Based on an image specification, write such an image to disk, using the command line ImageMagick program ('convert').
*
* Sample command line:
- * $ convert -size 100x60 xc:rgb(90,87,45) \
- * -draw 'fill rgb(12,34,56) polygon 41,39 44,57 50,57 41,39' \
- * -draw 'fill rgb(99,123,231) circle 59,39 56,57' \
- * -draw 'fill rgb(240,12,32) circle 50,21 50,3' filename.png
+ * $ convert -size 100x60 xc:rgb(90,87,45) \
+ * -draw 'fill rgb(12,34,56) polygon 41,39 44,57 50,57 41,39' \
+ * -draw 'fill rgb(99,123,231) circle 59,39 56,57' \
+ * -draw 'fill rgb(240,12,32) circle 50,21 50,3' filename.png
*
- * @param $spec: spec describing background and circles to draw
+ * @param $spec: spec describing background and shapes to draw
* @param $format: file format to write (unused by this method but kept so it has the same signature as writeImageWithApi)
* @param $filename: filename to write to
*/
dépôts / lhc / web / wiklou.git / blobdiff