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implemented image resizing and conversion to webp

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This commit is contained in:
Chris
2018-12-23 15:35:47 +01:00
parent b6612cd838
commit aa75c56364
5 changed files with 216 additions and 1 deletions
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0
content-controllers/image/conversion.php Normal file
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0
content-controllers/image/filters.php Normal file
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95
content-controllers/image/image.controller.php
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@@ -69,8 +69,75 @@ class ImageController implements ContentController
public function handleHash($hash,$url)
{
$path = ROOT.DS.'data'.DS.$hash.DS.$hash;
$type = getExtensionOfFilename($hash);
//get all our sub files where all the good functions lie
include_once(dirname(__FILE__).DS.'resize.php');
include_once(dirname(__FILE__).DS.'filters.php');
include_once(dirname(__FILE__).DS.'conversion.php');
//don't do this if it's a gif because PHP can't handle animated gifs
if($type!='gif')
{
foreach($url as $u)
{
if(isSize($u))
$modifiers['size'] = $u;
else if(isRotation($u))
$modifiers['rotation'] = $u;
}
if(in_array('webp',$url) && $type!='webp')
$modifiers['webp'] = true;
if(in_array('forcesize',$url) && $modifiers['size'])
$modifiers['forcesize'] = true;
}
else //gif
{
if(in_array('mp4',$url))
$modifiers['mp4']=true;
}
if($modifiers)
{
//why in gods name would you use http build query here???
//well we want a unique filename for every modied image
//so if we take all parameters in key=>value form and hash it
//we get one nice little hash for every eventuality
$modhash = md5(http_build_query($modifiers,'',','));
$newpath = ROOT.DS.'data'.DS.$hash.DS.$modhash.'_'.$hash;
$im = $this->getObjOfImage($path);
if(!file_exists($newpath))
{
foreach($modifiers as $mod => $val)
{
switch($mod)
{
case 'size':
($modifiers['forcesize']?forceResize($im,$val):resize($im,$val));
break;
case 'rotation':
rotate($im,$val);
break;
case 'webp':
$type = 'webp';
break;
case 'mp4':
break;
}
}
$this->saveObjOfImage($im,$newpath,$type);
}
$path = $newpath;
}
switch($type)
{
case 'jpeg':
@@ -95,4 +162,30 @@ class ImageController implements ContentController
break;
}
}
function getObjOfImage($path)
{
return imagecreatefromstring(file_get_contents($path));
}
function saveObjOfImage($im,$path,$type)
{
switch($type)
{
case 'jpeg':
case 'jpg':
imagejpeg($im,$path,(defined('JPEG_COMPRESSION')?JPEG_COMPRESSION:90));
break;
case 'png':
imagepng($im,$path,(defined('PNG_COMPRESSION')?PNG_COMPRESSION:6));
break;
case 'webp':
imagewebp($im,$path,(defined('WEBP_COMPRESSION')?WEBP_COMPRESSION:80));
break;
}
return $im;
}
}

120
content-controllers/image/resize.php Normal file
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@@ -0,0 +1,120 @@
<?php
function isRotation($var)
{
switch($var)
{
case 'upside':
case 'left':
case 'right': return true;
default: return false;
}
}
function rotate(&$im,$direction)
{
switch($direction)
{
case 'upside': $angle = 180;break;
case 'left': $angle = 90;break;
case 'right': $angle = -90;break;
default: $angle = 0;break;
}
$im = imagerotate($im,$angle,0);
}
function forceResize(&$img,$size)
{
$sd = sizeStringToWidthHeight($size);
$maxwidth = $sd['width'];
$maxheight = $sd['height'];
$width = imagesx($img);
$height = imagesy($img);
$maxwidth = ($maxwidth>$width?$width:$maxwidth);
$maxheight = ($maxheight>$height?$height:$maxheight);
$dst_img = imagecreatetruecolor($maxwidth, $maxheight);
$src_img = $img;
$palsize = ImageColorsTotal($img);
for ($i = 0; $i < $palsize; $i++)
{
$colors = ImageColorsForIndex($img, $i);
ImageColorAllocate($dst_img, $colors['red'], $colors['green'], $colors['blue']);
}
imagefill($dst_img, 0, 0, IMG_COLOR_TRANSPARENT);
imagesavealpha($dst_img,true);
imagealphablending($dst_img, true);
$width_new = $height * $maxwidth / $maxheight;
$height_new = $width * $maxheight / $maxwidth;
//if the new width is greater than the actual width of the image, then the height is too large and the rest cut off, or vice versa
if($width_new > $width){
//cut point by height
$h_point = (($height - $height_new) / 2);
//copy image
imagecopyresampled($dst_img, $src_img, 0, 0, 0, $h_point, $maxwidth, $maxheight, $width, $height_new);
}else{
//cut point by width
$w_point = (($width - $width_new) / 2);
imagecopyresampled($dst_img, $src_img, 0, 0, $w_point, 0, $maxwidth, $maxheight, $width_new, $height);
}
$img = $dst_img;
}
/**
* From: https://stackoverflow.com/questions/4590441/php-thumbnail-image-resizing-with-proportions
*/
function resize(&$img,$size)
{
$sd = sizeStringToWidthHeight($size);
$maxwidth = $sd['width'];
$maxheight = $sd['height'];
$width = imagesx($img);
$height = imagesy($img);
if(defined('ALLOW_BLOATING') && !ALLOW_BLOATING)
{
if($maxwidth>$width)$maxwidth = $width;
if($maxheight>$height)$maxheight = $height;
}
if ($height > $width)
{
$ratio = $maxheight / $height;
$newheight = $maxheight;
$newwidth = $width * $ratio;
}
else
{
$ratio = $maxwidth / $width;
$newwidth = $maxwidth;
$newheight = $height * $ratio;
}
$newimg = imagecreatetruecolor($newwidth,$newheight);
$palsize = ImageColorsTotal($img);
for ($i = 0; $i < $palsize; $i++)
{
$colors = ImageColorsForIndex($img, $i);
ImageColorAllocate($newimg, $colors['red'], $colors['green'], $colors['blue']);
}
imagefill($newimg, 0, 0, IMG_COLOR_TRANSPARENT);
imagesavealpha($newimg,true);
imagealphablending($newimg, true);
imagecopyresampled($newimg, $img, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
$img = $newimg;
}

2
inc/core.php
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@@ -4,6 +4,8 @@ spl_autoload_register('autoload');
//disable output buffering
if (ob_get_level()) ob_end_clean();
error_reporting(E_ALL & ~E_NOTICE);
if(!defined('FFMPEG_BINARY'))
define('FFMPEG_BINARY',ROOT.DS.'bin'.DS.'ffmpeg');