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-rw-r--r--admin/include/image.class.php104
1 files changed, 100 insertions, 4 deletions
diff --git a/admin/include/image.class.php b/admin/include/image.class.php
index 53a27b924..03cf419a4 100644
--- a/admin/include/image.class.php
+++ b/admin/include/image.class.php
@@ -41,6 +41,10 @@ interface imageInterface
function rotate($rotation);
function resize($width, $height);
+
+ function sharpen($amount);
+
+ function compose($overlay, $x, $y, $opacity);
function write($destination_filepath);
}
@@ -258,6 +262,31 @@ class pwg_image
return $rotation;
}
+ /** Returns a normalized convolution kernel for sharpening*/
+ static function get_sharpen_matrix($amount)
+ {
+ // Amount should be in the range of 18-10
+ $amount = round(abs(-18 + ($amount * 0.08)), 2);
+
+ $matrix = array
+ (
+ array(-1, -1, -1),
+ array(-1, $amount, -1),
+ array(-1, -1, -1),
+ );
+
+ $norm = array_sum(array_map('array_sum', $matrix));
+
+ for ($i=0; $i<3; $i++)
+ {
+ $line = & $matrix[$i];
+ for ($j=0; $j<3; $j++)
+ $line[$j] /= $norm;
+ }
+
+ return $matrix;
+ }
+
private function get_resize_result($destination_filepath, $width, $height, $time=null)
{
return array(
@@ -397,6 +426,18 @@ class image_imagick implements imageInterface
return $this->image->resizeImage($width, $height, Imagick::FILTER_LANCZOS, 0.9);
}
+ function sharpen($amount)
+ {
+ $m = pwg_image::get_sharpen_matrix($amount);
+ return $this->image->convolveImage($m);
+ }
+
+ function compose($overlay, $x, $y, $opacity)
+ {
+ // todo
+ return false;
+ }
+
function write($destination_filepath)
{
return $this->image->writeImage($destination_filepath);
@@ -415,16 +456,17 @@ class image_ext_imagick implements imageInterface
var $height = '';
var $commands = array();
- function __construct($source_filepath, $imagickdir='')
+ function __construct($source_filepath)
{
+ global $conf;
$this->source_filepath = $source_filepath;
- $this->imagickdir = $imagickdir;
+ $this->imagickdir = $conf['ext_imagick_dir'];
- $command = $imagickdir.'identify -format "%wx%h" "'.realpath($source_filepath).'"';
+ $command = $this->imagickdir.'identify -format "%wx%h" "'.realpath($source_filepath).'"';
@exec($command, $returnarray);
if(!is_array($returnarray) or empty($returnarray[0]) or !preg_match('/^(\d+)x(\d+)$/', $returnarray[0], $match))
{
- die("[External ImageMagick] Corrupt image");
+ die("[External ImageMagick] Corrupt image\n" . var_export($returnarray, true));
}
$this->width = $match[1];
@@ -479,6 +521,31 @@ class image_ext_imagick implements imageInterface
return true;
}
+ function sharpen($amount)
+ {
+ $m = pwg_image::get_sharpen_matrix($amount);
+
+ $param ='convolve "'.count($m).':';
+ foreach ($m as $line)
+ {
+ $param .= ' ';
+ $param .= implode(',', $line);
+ }
+ $param .= '"';
+ $this->add_command('morphology', $param);
+ return true;
+ }
+
+ function compose($overlay, $x, $y, $opacity)
+ {
+ $param = 'compose dissolve -define compose:args='.$opacity;
+ $param .= ' '.escapeshellarg(realpath($overlay->image->source_filepath));
+ $param .= ' -gravity NorthWest -geometry +'.$x.'+'.$y;
+ $param .= ' -composite';
+ $this->add_command($param);
+ return true;
+ }
+
function write($destination_filepath)
{
$exec = $this->imagickdir.'convert';
@@ -496,6 +563,8 @@ class image_ext_imagick implements imageInterface
$dest = pathinfo($destination_filepath);
$exec .= ' "'.realpath($dest['dirname']).'/'.$dest['basename'].'"';
@exec($exec, $returnarray);
+
+ //echo($exec);
return is_array($returnarray);
}
}
@@ -611,6 +680,33 @@ class image_gd implements imageInterface
return $result;
}
+ function sharpen($amount)
+ {
+ $m = pwg_image::get_sharpen_matrix($amount);
+ return imageconvolution($this->image, $m, 1, 0);
+ }
+
+ function compose($overlay, $x, $y, $opacity)
+ {
+ $ioverlay = $overlay->image->image;
+ /* A replacement for php's imagecopymerge() function that supports the alpha channel
+ See php bug #23815: http://bugs.php.net/bug.php?id=23815 */
+
+ $ow = imagesx($ioverlay);
+ $oh = imagesy($ioverlay);
+
+ // Create a new blank image the site of our source image
+ $cut = imagecreatetruecolor($ow, $oh);
+
+ // Copy the blank image into the destination image where the source goes
+ imagecopy($cut, $this->image, 0, 0, $x, $y, $ow, $oh);
+
+ // Place the source image in the destination image
+ imagecopy($cut, $ioverlay, 0, 0, 0, 0, $ow, $oh);
+ imagecopymerge($this->image, $cut, $x, $y, 0, 0, $ow, $oh, $opacity);
+ return true;
+ }
+
function write($destination_filepath)
{
$extension = strtolower(get_extension($destination_filepath));