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-rw-r--r--application/libraries/Exif.php37
-rw-r--r--application/libraries/Image.php274
-rw-r--r--application/libraries/Image/Drivers/GD.php226
-rw-r--r--application/libraries/Image/Drivers/imagemagick.php121
4 files changed, 489 insertions, 169 deletions
diff --git a/application/libraries/Exif.php b/application/libraries/Exif.php
new file mode 100644
index 000000000..27dd11a65
--- /dev/null
+++ b/application/libraries/Exif.php
@@ -0,0 +1,37 @@
+<?php
+/*
+ * Copyright 2014-2015 Florian "Bluewind" Pritz <bluewind@server-speed.net>
+ *
+ * Licensed under AGPLv3
+ * (see COPYING for full license text)
+ *
+ */
+
+namespace libraries;
+
+class Exif {
+ static public function get_exif($file)
+ {
+ // TODO: support more types (identify or exiftool? might be slow :( )
+ try {
+ $type = getimagesize($file)[2];
+ } catch (\ErrorException $e) {
+ return false;
+ }
+ switch ($type) {
+ case IMAGETYPE_JPEG:
+ getimagesize($file, $info);
+ if (isset($info["APP1"]) && strpos($info["APP1"], "http://ns.adobe.com/xap/1.0/") === 0) {
+ // ignore XMP data which makes exif_read_data throw a warning
+ // http://stackoverflow.com/a/8864064
+ return false;
+ }
+ return @exif_read_data($file);
+ break;
+ default:
+ }
+
+ return false;
+ }
+
+}
diff --git a/application/libraries/Image.php b/application/libraries/Image.php
index 0f920358a..9c624eec1 100644
--- a/application/libraries/Image.php
+++ b/application/libraries/Image.php
@@ -1,12 +1,76 @@
<?php
/*
- * Copyright 2014 Florian "Bluewind" Pritz <bluewind@server-speed.net>
+ * Copyright 2014-2015 Florian "Bluewind" Pritz <bluewind@server-speed.net>
*
* Licensed under AGPLv3
* (see COPYING for full license text)
*
*/
+namespace libraries\Image;
+
+interface ImageDriver {
+ /**
+ * Replace the current image by reading in a file
+ * @param file file to read
+ */
+ public function read($file);
+
+ /**
+ * Return the current image rendered to a specific format. Passing null as
+ * the target_type returns the image in the format of the source image
+ * (loaded with read()).
+ *
+ * @param target_type one of IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG or null
+ * @return binary image data
+ */
+ public function get($target_type);
+
+ /**
+ * Resize the image.
+ * @param width
+ * @param height
+ */
+ public function resize($width, $height);
+
+ /**
+ * Crop the image to the area defined by x, y, width and height.
+ *
+ * @param x starting coordinate
+ * @param y starting coordinate
+ * @param width width of the area
+ * @param height height of the area
+ */
+ public function crop($x, $y, $width, $height);
+
+ /**
+ * Crop/resize the image to fit into the desired size. This also rotates
+ * the image if the source image had an EXIF orientation tag.
+ *
+ * @param width width of the resulting image
+ * @param height height of the resulting image
+ */
+ public function makeThumb($target_width, $target_height);
+
+ /**
+ * Rotate the image according to the sources EXIF orientation tag if any.
+ */
+ public function apply_exif_orientation();
+
+ /**
+ * Mirror the image along the x axis.
+ */
+ public function mirror();
+
+ /**
+ * Return priority for this driver. Higher number means a higher priority.
+ *
+ * @param mimetype mimetype of the file
+ * @return > 0 if supported, < 0 if the mimetype can't be handled
+ */
+ public static function get_priority($mimetype);
+}
+
namespace libraries;
/**
@@ -14,9 +78,12 @@ namespace libraries;
* operate on this image.
*/
class Image {
- private $img;
- private $source_type;
- private $exif;
+ private $driver;
+
+ private $image_drivers = array(
+ "libraries\Image\Drivers\GD",
+ "libraries\Image\Drivers\imagemagick",
+ );
/**
* Create a new object and load the contents of file.
@@ -28,39 +95,42 @@ class Image {
}
/**
- * Replace the current image by reading in a file
- * @param file file to read
+ * Get the best driver supporting $mimetype.
+ *
+ * @param drivers list of driver classes
+ * @param mimetype mimetype the driver should support
+ * @return driver from $drivers or NULL if no driver supports the type
*/
- public function read($file)
+ private function best_driver($drivers, $mimetype)
{
- $img = imagecreatefromstring(file_get_contents($file));
- if ($img === false) {
- throw new \exceptions\ApiException("libraries/Image/unsupported-image-type", "Unsupported image type");
+ $best = 0;
+ $best_driver = null;
+ foreach ($drivers as $driver) {
+ $current = $driver::get_priority($mimetype);
+ if ($best == 0 || ($current > $best && $current > 0)) {
+ $best_driver = $driver;
+ $best = $current;
+ }
}
- $this->set_img_object($img);
- $this->fix_alpha();
- $this->source_type = getimagesize($file)[2];
- $this->exif = self::get_exif($file);
+ return $best_driver;
}
- static private function get_exif($file)
+ /**
+ * Replace the current image by reading in a file
+ * @param file file to read
+ */
+ public function read($file)
{
- $type = getimagesize($file)[2];
- switch ($type) {
- case IMAGETYPE_JPEG:
- getimagesize($file, $info);
- if (isset($info["APP1"]) && strpos($info["APP1"], "http://ns.adobe.com/xap/1.0/") === 0) {
- // ignore XMP data which makes exif_read_data throw a warning
- // http://stackoverflow.com/a/8864064
- return false;
- }
- return @exif_read_data($file);
- break;
- default:
+ $mimetype = mimetype($file);
+
+ $driver = $this->best_driver($this->image_drivers, $mimetype);
+
+ if ($driver === NULL) {
+ throw new \exceptions\ApiException("libraries/Image/unsupported-image-type", "Unsupported image type");
}
- return false;
+ $this->driver = new $driver($file);
}
/**
@@ -73,31 +143,7 @@ class Image {
*/
public function get($target_type = null)
{
- if ($target_type === null) {
- $target_type = $this->source_type;
- }
-
- ob_start();
- switch ($target_type) {
- case IMAGETYPE_GIF:
- $ret = imagegif($this->img);
- break;
- case IMAGETYPE_JPEG:
- $ret = imagejpeg($this->img);
- break;
- case IMAGETYPE_PNG:
- $ret = imagepng($this->img);
- break;
- default:
- assert(0);
- }
- $result = ob_get_clean();
-
- if (!$ret || $result === false) {
- throw new \exceptions\ApiException("libraries/Image/thumbnail-creation-failed", "Failed to create thumbnail");
- }
-
- return $result;
+ return $this->driver->get($target_type);
}
/**
@@ -107,18 +153,7 @@ class Image {
*/
public function resize($width, $height)
{
- $temp_gdim = imagecreatetruecolor($width, $height);
- $this->fix_alpha();
- imagecopyresampled(
- $temp_gdim,
- $this->img,
- 0, 0,
- 0, 0,
- $width, $height,
- imagesx($this->img), imagesy($this->img)
- );
-
- $this->set_img_object($temp_gdim);
+ return $this->driver->resize($width, $height);
}
/**
@@ -131,17 +166,7 @@ class Image {
*/
public function crop($x, $y, $width, $height)
{
- $thumb = imagecreatetruecolor($width, $height);
- $this->fix_alpha();
- imagecopy(
- $thumb,
- $this->img,
- 0, 0,
- $x, $y,
- $width, $height
- );
-
- $this->set_img_object($thumb);
+ return $this->driver->crop($x, $y, $width, $height);
}
/**
@@ -151,34 +176,14 @@ class Image {
* @param width width of the resulting image
* @param height height of the resulting image
*/
- // Source: http://salman-w.blogspot.co.at/2009/04/crop-to-fit-image-using-aspphp.html
public function makeThumb($target_width, $target_height)
{
- $source_aspect_ratio = imagesx($this->img) / imagesy($this->img);
- $desired_aspect_ratio = $target_width / $target_height;
-
- if ($source_aspect_ratio > $desired_aspect_ratio) {
- // Triggered when source image is wider
- $temp_height = $target_height;
- $temp_width = round(($target_height * $source_aspect_ratio));
- } else {
- // Triggered otherwise (i.e. source image is similar or taller)
- $temp_width = $target_width;
- $temp_height = round(($target_width / $source_aspect_ratio));
- }
-
- $this->resize($temp_width, $temp_height);
-
- $x0 = ($temp_width - $target_width) / 2;
- $y0 = ($temp_height - $target_height) / 2;
- $this->crop($x0, $y0, $target_width, $target_height);
-
- $this->apply_exif_orientation();
+ return $this->driver->makeThumb($target_width, $target_height);
}
static public function get_exif_orientation($file)
{
- $exif = self::get_exif($file);
+ $exif = \libraries\Exif::get_exif($file);
if (isset($exif["Orientation"])) {
return $exif["Orientation"];
}
@@ -190,45 +195,7 @@ class Image {
*/
public function apply_exif_orientation()
{
- if (isset($this->exif['Orientation'])) {
- $mirror = false;
- $deg = 0;
-
- switch ($this->exif['Orientation']) {
- case 2:
- $mirror = true;
- break;
- case 3:
- $deg = 180;
- break;
- case 4:
- $deg = 180;
- $mirror = true;
- break;
- case 5:
- $deg = 270;
- $mirror = true;
- break;
- case 6:
- $deg = 270;
- break;
- case 7:
- $deg = 90;
- $mirror = true;
- break;
- case 8:
- $deg = 90;
- break;
- }
-
- if ($deg) {
- $this->set_img_object(imagerotate($this->img, $deg, 0));
- }
-
- if ($mirror) {
- $this->mirror();
- }
- }
+ return $this->driver->apply_exif_orientation();
}
/**
@@ -236,38 +203,7 @@ class Image {
*/
public function mirror()
{
- $width = imagesx($this->img);
- $height = imagesy($this->img);
-
- $src_x = $width -1;
- $src_y = 0;
- $src_width = -$width;
- $src_height = $height;
-
- $imgdest = imagecreatetruecolor($width, $height);
- imagealphablending($imgdest,false);
- imagesavealpha($imgdest,true);
-
- imagecopyresampled($imgdest, $this->img, 0, 0, $src_x, $src_y, $width, $height, $src_width, $src_height);
- $this->set_img_object($imgdest);
- }
-
- private function set_img_object($new)
- {
- assert($new !== false);
-
- $old = $this->img;
- $this->img = $new;
-
- if ($old != null) {
- imagedestroy($old);
- }
- }
-
- private function fix_alpha()
- {
- imagealphablending($this->img,false);
- imagesavealpha($this->img,true);
+ return $this->driver->mirror();
}
}
diff --git a/application/libraries/Image/Drivers/GD.php b/application/libraries/Image/Drivers/GD.php
new file mode 100644
index 000000000..5c6411ced
--- /dev/null
+++ b/application/libraries/Image/Drivers/GD.php
@@ -0,0 +1,226 @@
+<?php
+/*
+ * Copyright 2014-2015 Florian "Bluewind" Pritz <bluewind@server-speed.net>
+ *
+ * Licensed under AGPLv3
+ * (see COPYING for full license text)
+ *
+ */
+
+namespace libraries\Image\Drivers;
+
+class GD implements \libraries\Image\ImageDriver {
+ private $img;
+ private $source_type;
+ private $exif;
+
+ public static function get_priority($mimetype)
+ {
+ switch($mimetype) {
+ case "image/jpeg":
+ case "image/png":
+ case "image/gif":
+ return 1000;
+ break;
+ default:
+ return -1;
+ break;
+ }
+ }
+
+ /**
+ * Create a new object and load the contents of file.
+ * @param file file to read
+ */
+ public function __construct($file)
+ {
+ $this->read($file);
+ }
+
+ public function read($file)
+ {
+ $img = imagecreatefromstring(file_get_contents($file));
+ if ($img === false) {
+ throw new \exceptions\ApiException("libraries/Image/unsupported-image-type", "Unsupported image type");
+ }
+ $this->set_img_object($img);
+ $this->fix_alpha();
+
+ $this->source_type = getimagesize($file)[2];
+ $this->exif = \libraries\Exif::get_exif($file);
+ }
+
+ public function get($target_type = null)
+ {
+ if ($target_type === null) {
+ $target_type = $this->source_type;
+ }
+
+ ob_start();
+ switch ($target_type) {
+ case IMAGETYPE_GIF:
+ $ret = imagegif($this->img);
+ break;
+ case IMAGETYPE_JPEG:
+ $ret = imagejpeg($this->img);
+ break;
+ case IMAGETYPE_PNG:
+ $ret = imagepng($this->img);
+ break;
+ default:
+ assert(0);
+ }
+ $result = ob_get_clean();
+
+ if (!$ret || $result === false) {
+ throw new \exceptions\ApiException("libraries/Image/thumbnail-creation-failed", "Failed to create thumbnail");
+ }
+
+ return $result;
+ }
+
+ public function resize($width, $height)
+ {
+ $temp_gdim = imagecreatetruecolor($width, $height);
+ $this->fix_alpha();
+ imagecopyresampled(
+ $temp_gdim,
+ $this->img,
+ 0, 0,
+ 0, 0,
+ $width, $height,
+ imagesx($this->img), imagesy($this->img)
+ );
+
+ $this->set_img_object($temp_gdim);
+ }
+
+ public function crop($x, $y, $width, $height)
+ {
+ $thumb = imagecreatetruecolor($width, $height);
+ $this->fix_alpha();
+ imagecopy(
+ $thumb,
+ $this->img,
+ 0, 0,
+ $x, $y,
+ $width, $height
+ );
+
+ $this->set_img_object($thumb);
+ }
+
+ // Source: http://salman-w.blogspot.co.at/2009/04/crop-to-fit-image-using-aspphp.html
+ public function makeThumb($target_width, $target_height)
+ {
+ $source_aspect_ratio = imagesx($this->img) / imagesy($this->img);
+ $desired_aspect_ratio = $target_width / $target_height;
+
+ if ($source_aspect_ratio > $desired_aspect_ratio) {
+ // Triggered when source image is wider
+ $temp_height = $target_height;
+ $temp_width = round(($target_height * $source_aspect_ratio));
+ } else {
+ // Triggered otherwise (i.e. source image is similar or taller)
+ $temp_width = $target_width;
+ $temp_height = round(($target_width / $source_aspect_ratio));
+ }
+
+ $this->resize($temp_width, $temp_height);
+
+ $x0 = ($temp_width - $target_width) / 2;
+ $y0 = ($temp_height - $target_height) / 2;
+ $this->crop($x0, $y0, $target_width, $target_height);
+
+ $this->apply_exif_orientation();
+ }
+
+ static public function get_exif_orientation($file)
+ {
+ $exif = \libraries\Exif::get_exif($file);
+ if (isset($exif["Orientation"])) {
+ return $exif["Orientation"];
+ }
+ return 0;
+ }
+
+ public function apply_exif_orientation()
+ {
+ if (isset($this->exif['Orientation'])) {
+ $mirror = false;
+ $deg = 0;
+
+ switch ($this->exif['Orientation']) {
+ case 2:
+ $mirror = true;
+ break;
+ case 3:
+ $deg = 180;
+ break;
+ case 4:
+ $deg = 180;
+ $mirror = true;
+ break;
+ case 5:
+ $deg = 270;
+ $mirror = true;
+ break;
+ case 6:
+ $deg = 270;
+ break;
+ case 7:
+ $deg = 90;
+ $mirror = true;
+ break;
+ case 8:
+ $deg = 90;
+ break;
+ }
+
+ if ($deg) {
+ $this->set_img_object(imagerotate($this->img, $deg, 0));
+ }
+
+ if ($mirror) {
+ $this->mirror();
+ }
+ }
+ }
+
+ public function mirror()
+ {
+ $width = imagesx($this->img);
+ $height = imagesy($this->img);
+
+ $src_x = $width -1;
+ $src_y = 0;
+ $src_width = -$width;
+ $src_height = $height;
+
+ $imgdest = imagecreatetruecolor($width, $height);
+ imagealphablending($imgdest,false);
+ imagesavealpha($imgdest,true);
+
+ imagecopyresampled($imgdest, $this->img, 0, 0, $src_x, $src_y, $width, $height, $src_width, $src_height);
+ $this->set_img_object($imgdest);
+ }
+
+ private function set_img_object($new)
+ {
+ assert($new !== false);
+
+ $old = $this->img;
+ $this->img = $new;
+
+ if ($old != null) {
+ imagedestroy($old);
+ }
+ }
+
+ private function fix_alpha()
+ {
+ imagealphablending($this->img,false);
+ imagesavealpha($this->img,true);
+ }
+
+}
diff --git a/application/libraries/Image/Drivers/imagemagick.php b/application/libraries/Image/Drivers/imagemagick.php
new file mode 100644
index 000000000..bcd8da40b
--- /dev/null
+++ b/application/libraries/Image/Drivers/imagemagick.php
@@ -0,0 +1,121 @@
+<?php
+/*
+ * Copyright 2015 Florian "Bluewind" Pritz <bluewind@server-speed.net>
+ *
+ * Licensed under AGPLv3
+ * (see COPYING for full license text)
+ *
+ */
+
+namespace libraries\Image\Drivers;
+
+class imagemagick implements \libraries\Image\ImageDriver {
+ private $source_file;
+ private $arguments = array();
+
+ public static function get_priority($mimetype)
+ {
+ return 100;
+ }
+
+ /**
+ * Create a new object and load the contents of file.
+ * @param file file to read
+ */
+ public function __construct($file)
+ {
+ $this->read($file);
+ }
+
+ public function read($file)
+ {
+ if (!file_exists($file)) {
+ throw new \exceptions\ApiException("libraries/Image/drivers/imagemagick/missing-file", "Source file doesn't exist");
+ }
+
+ $this->source_file = $file;
+ $this->arguments = array();
+ }
+
+ private function passthru($arguments)
+ {
+ $command_string = implode(" ", array_map("escapeshellarg", $arguments));
+ passthru($command_string, $ret);
+ return $ret;
+ }
+
+ public function get($target_type = null)
+ {
+ if ($target_type === null) {
+ return file_get_contents($this->source_file);
+ }
+
+ $command = array("convert");
+ $command = array_merge($command, $this->arguments);
+ $command[] = $this->source_file."[0]";
+
+ ob_start();
+ switch ($target_type) {
+ case IMAGETYPE_GIF:
+ $command[] = "gif:-";
+ break;
+ case IMAGETYPE_JPEG:
+ $command[] = "jpeg:-";
+ break;
+ case IMAGETYPE_PNG:
+ $command[] = "png:-";
+ break;
+ default:
+ assert(0);
+ }
+ $ret = $this->passthru($command);
+ $result = ob_get_clean();
+
+ if ($ret != 0 || $result === false) {
+ throw new \exceptions\ApiException("libraries/Image/thumbnail-creation-failed", "Failed to create thumbnail");
+ }
+
+ return $result;
+ }
+
+ public function resize($width, $height)
+ {
+ $this->arguments[] = "-resize";
+ $this->arguments[] = "${width}x${height}";
+ }
+
+ public function crop($x, $y, $width, $height)
+ {
+ $this->arguments[] = "+repage";
+ $this->arguments[] = "-crop";
+ $this->arguments[] = "${width}x${height}+${x}+${y}";
+ $this->arguments[] = "+repage";
+ }
+
+ // Source: http://salman-w.blogspot.co.at/2009/04/crop-to-fit-image-using-aspphp.html
+ public function makeThumb($target_width, $target_height)
+ {
+ assert(is_int($target_width));
+ assert(is_int($target_height));
+
+ $this->apply_exif_orientation();
+
+ $this->arguments[] = "-thumbnail";
+ $this->arguments[] = "${target_width}x${target_height}^";
+ $this->arguments[] = "-gravity";
+ $this->arguments[] = "center";
+ $this->arguments[] = "-extent";
+ $this->arguments[] = "${target_width}x${target_height}^";
+ }
+
+ public function apply_exif_orientation()
+ {
+ $this->arguments[] = "-auto-orient";
+ }
+
+ public function mirror()
+ {
+ $this->arguments[] = "-flip";
+ }
+
+}