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<?php
/**
* This file is part of PDepend.
*
* PHP Version 5
*
* Copyright (c) 2008-2017 Manuel Pichler <mapi@pdepend.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Manuel Pichler nor the names of his
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @copyright 2008-2017 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*/
namespace PDepend\Util;
use Imagick;
/**
* Simple utility class that is used to create different image formats. This
* class can use the ImageMagick cli tool <b>convert</b> and the pecl extension
* <b>pecl/imagick</b>.
*
* @copyright 2008-2017 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*/
class ImageConvert
{
/**
* Tries to converts the <b>$input</b> image into the <b>$output</b> format.
*
* @param string $input The input file.
* @param string $output The output file.
*
* @return void
*/
public static function convert($input, $output)
{
$inputType = strtolower(pathinfo($input, PATHINFO_EXTENSION));
$outputType = strtolower(pathinfo($output, PATHINFO_EXTENSION));
// Check for output file without extension and reuse input type
if ($outputType === '') {
$outputType = $inputType;
$output .= ".{$outputType}";
}
if ($inputType === 'svg') {
self::prepareSvg($input);
}
if ($inputType === $outputType) {
file_put_contents($output, file_get_contents($input));
} elseif (extension_loaded('imagick') === true) {
$imagick = new Imagick($input);
$imagick->setImageFormat($outputType);
$imagick->writeImage($output);
// The following code is not testable when imagick is installed
// @codeCoverageIgnoreStart
} elseif (self::hasImagickConvert() === true) {
$input = escapeshellarg($input);
$output = escapeshellarg($output);
system("convert {$input} {$output}");
} else {
$fallback = substr($output, 0, -strlen($outputType)) . $inputType;
echo "WARNING: Cannot generate image of type '{$outputType}'. This",
" feature needs either the\n pecl/imagick extension or",
" the ImageMagick cli tool 'convert'.\n\n",
"Writing alternative image:\n{$fallback}\n\n";
file_put_contents($fallback, file_get_contents($input));
}
// @codeCoverageIgnoreEnd
}
/**
* Tests that the ImageMagick CLI tool <b>convert</b> exists.
*
* @return bool
*/
protected static function hasImagickConvert()
{
// @codeCoverageIgnoreStart
$desc = array(
0 => array('pipe', 'r'),
1 => array('pipe', 'w'),
2 => array('pipe', 'a'),
);
$proc = proc_open('convert', $desc, $pipes);
if (is_resource($proc)) {
fwrite($pipes[0], '-version');
fclose($pipes[0]);
return (0 === proc_close($proc));
}
return false;
// @codeCoverageIgnoreEnd
}
/**
* Utility method for svg input files.
*
* If the input file has the mime type svg and a configuration file with
* imageConvert options exists, this method will prepare the input image
* file.
*
* @param string $input The input svg file.
*
* @return void
*/
protected static function prepareSvg($input)
{
// Check for a configuration instance
if (($config = ConfigurationInstance::get()) === null) {
return;
}
$svg = file_get_contents($input);
// Check for font family
if (isset($config->imageConvert->fontFamily)) {
// Get font family
$fontFamily = (string) $config->imageConvert->fontFamily;
// Replace CSS separators
$fontReplace = 'font-family:' . strtr($fontFamily, ';:', ' ');
$fontPattern = '/font-family:\s*Arial/';
$svg = preg_replace($fontPattern, $fontReplace, $svg);
}
// Check for font size
if (isset($config->imageConvert->fontSize)) {
// Get font size
$fontSize = abs((float) $config->imageConvert->fontSize);
// Fetch all font-size expressions
preg_match_all('/font-size:\s*(\d+)/', $svg, $fontSizes);
$fontSizes = array_unique($fontSizes[1]);
$resize = ($fontSize - max($fontSizes));
foreach ($fontSizes as $fontSize) {
// Calculate resize value
$fontReplace = 'font-size:' . ($fontSize + $resize);
$fontPattern = "/font-size:\s*{$fontSize}/";
$svg = preg_replace($fontPattern, $fontReplace, $svg);
}
}
file_put_contents($input, $svg);
}
}