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preserve transparency on PNGs
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Etliche Male $this->keepTransparent($gdimage); eingesetzt - Vgl. redaxo#101
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@cukabeka
cukabeka committed Oct 31, 2014
1 parent 023a2d0 commit 630e5b5
Showing 1 changed file with 201 additions and 153 deletions.
354 changes: 201 additions & 153 deletions redaxo/include/addons/image_manager/classes/effects/class.rex_effect_resize.inc.php
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Expand Up @@ -6,177 +6,225 @@

class rex_effect_resize extends rex_effect_abstract
{
var $options;
var $script;
var $options;
var $script;

function rex_effect_resize()
{
function rex_effect_resize()
{

$this->options = array('maximum', 'minimum', 'exact');
$this->options = array('maximum','minimum','exact');

$this->script = '
$this->script = '
<script type="text/javascript">
<!--
(function($) {
$(function() {
var $fx_resize_select_style = $("#image_manager_rex_effect_resize_style_select");
var $fx_resize_enlarge = $("#image_manager_rex_effect_resize_allow_enlarge_select").parent().parent();
$fx_resize_select_style.change(function(){
if(jQuery(this).val() == "exact")
{
$fx_resize_enlarge.hide();
}else
{
$fx_resize_enlarge.show();
}
}).change();
});
$(function() {
var $fx_resize_select_style = $("#image_manager_rex_effect_resize_style_select");
var $fx_resize_enlarge = $("#image_manager_rex_effect_resize_allow_enlarge_select").parent().parent();
$fx_resize_select_style.change(function(){
if(jQuery(this).val() == "exact")
{
$fx_resize_enlarge.hide();
}else
{
$fx_resize_enlarge.show();
}
}).change();
});
})(jQuery);
//--></script>';

}

function execute()
{
$gdimage =& $this->image->getImage();
$w = $this->image->getWidth();
$h = $this->image->getHeight();

if(!isset($this->params['style']) || !in_array($this->params['style'],$this->options))
{
$this->params['style'] = 'maximum';
}

// relatives resizen
if(substr(trim($this->params['width']), -1) === '%')
{
$this->params['width'] = round($w * (rtrim($this->params['width'], '%') / 100));
}
if(substr(trim($this->params['height']), -1) === '%')
{
$this->params['height'] = round($h * (rtrim($this->params['height'], '%') / 100));
}

if($this->params['style'] == 'maximum')
{
$this->resizeMax($w, $h);
}else if($this->params['style'] == 'minimum')
{
$this->resizeMin($w, $h);
}else
{
// warp => nichts tun
}

function execute()
{

if (!$this->image->isImage()) {
return false;
}

$gdimage = & $this->image->getImage();
$w = $this->image->getWidth();
$h = $this->image->getHeight();

if (!isset($this->params['style']) || !in_array($this->params['style'], $this->options)) {
$this->params['style'] = 'maximum';
}

// relatives resizen
if (substr(trim($this->params['width']), -1) === '%') {
$this->params['width'] = round($w * (rtrim($this->params['width'], '%') / 100));
}
if (substr(trim($this->params['height']), -1) === '%') {
$this->params['height'] = round($h * (rtrim($this->params['height'], '%') / 100));
}

if ($this->params['style'] == 'maximum') {
$this->resizeMax($w, $h);
} elseif ($this->params['style'] == 'minimum') {
$this->resizeMin($w, $h);
} else {
// warp => nichts tun
}

// ----- not enlarge image
if ($w <= $this->params['width'] && $h <= $this->params['height'] && $this->params['allow_enlarge'] == 'not_enlarge') {
$this->params['width'] = $w;
$this->params['height'] = $h;
$this->keepTransparent($gdimage);
return;
}

if (!isset($this->params['width'])) {
$this->params['width'] = $w;
}

if (!isset($this->params['height'])) {
$this->params['height'] = $h;
}

if (function_exists('ImageCreateTrueColor')) {
$des = @ImageCreateTrueColor($this->params['width'], $this->params['height']);
} else {
$des = @ImageCreate($this->params['width'], $this->params['height']);
}

if (!$des) {
return;
}

$this->keepTransparent($des);
imagecopyresampled($des, $gdimage, 0, 0, 0, 0, $this->params['width'], $this->params['height'], $w, $h);

$gdimage = $des;
$this->image->refreshDimensions();
// ----- not enlarge image
if($w <= $this->params['width'] && $h <= $this->params['height'] && $this->params['allow_enlarge'] == "not_enlarge")
{
$this->params['width'] = $w;
$this->params['height'] = $h;
$this->keepTransparent($gdimage);
return;
}

function resizeMax($w, $h)
{
if (!empty($this->params['height']) && !empty($this->params['width'])) {
$img_ratio = $w / $h;
$resize_ratio = $this->params['width'] / $this->params['height'];

if ($img_ratio >= $resize_ratio) {
// --- width
$this->params['height'] = ceil($this->params['width'] / $w * $h);
} else {
// --- height
$this->params['width'] = ceil($this->params['height'] / $h * $w);
}
} elseif (!empty($this->params['height'])) {
$img_factor = $h / $this->params['height'];
$this->params['width'] = ceil($w / $img_factor);
} elseif (!empty($this->params['width'])) {
$img_factor = $w / $this->params['width'];
$this->params['height'] = ceil($h / $img_factor);
}
if(!isset($this->params["width"]))
{
$this->params["width"] = $w;
}

function resizeMin($w, $h)
{
if (!empty($this->params['height']) && !empty($this->params['width'])) {
$img_ratio = $w / $h;
$resize_ratio = $this->params['width'] / $this->params['height'];

if ($img_ratio < $resize_ratio) {
// --- width
$this->params['height'] = ceil($this->params['width'] / $w * $h);
} else {
// --- height
$this->params['width'] = ceil($this->params['height'] / $h * $w);
}
} elseif (!empty($this->params['height'])) {
$img_factor = $h / $this->params['height'];
$this->params['width'] = ceil($w / $img_factor);
} elseif (!empty($this->params['width'])) {
$img_factor = $w / $this->params['width'];
$this->params['height'] = ceil($h / $img_factor);
}
if(!isset($this->params["height"]))
{
$this->params["height"] = $h;
}

function getParams()
{
global $REX, $I18N;

return array(
array(
'label' => $I18N->msg('imanager_effect_resize_width'),
'name' => 'width',
'type' => 'int',
),
array(
'label' => $I18N->msg('imanager_effect_resize_height'),
'name' => 'height',
'type' => 'int'
),
array(
'label' => $I18N->msg('imanager_effect_resize_style'),
'name' => 'style',
'type' => 'select',
'options' => $this->options,
'default' => 'fit',
'suffix' => $this->script
),
array(
'label' => $I18N->msg('imanager_effect_resize_imgtosmall'),
'name' => 'allow_enlarge',
'type' => 'select',
'options' => array('enlarge', 'not_enlarge'),
'default' => 'enlarge',
),
);
if (function_exists('ImageCreateTrueColor'))
{
$des = @ImageCreateTrueColor($this->params['width'], $this->params['height']);
}else
{
$des = @ImageCreate($this->params['width'], $this->params['height']);
}

if(!$des)
{
return;
}

// Transparenz erhalten
$this->keepTransparent($des);
imagecopyresampled($des, $gdimage, 0, 0, 0, 0, $this->params['width'], $this->params['height'], $w, $h);

$gdimage = $des;
$this->image->refreshDimensions();
}

function resizeMax($w, $h)
{
if (!empty($this->params['height']) && !empty($this->params['width']))
{
$img_ratio = $w / $h;
$resize_ratio = $this->params['width'] / $this->params['height'];

if ($img_ratio >= $resize_ratio)
{
// --- width
$this->params['height'] = ceil ($this->params['width'] / $w * $h);
$this->keepTransparent($gdimage);
}else
{
// --- height
$this->params['width'] = ceil ($this->params['height'] / $h * $w);
$this->keepTransparent($gdimage);
}
}elseif (!empty($this->params['height']))
{
$img_factor = $h / $this->params['height'];
$this->params['width'] = ceil ($w / $img_factor);
$this->keepTransparent($gdimage);
}elseif (!empty($this->params['width']))
{
$img_factor = $w / $this->params['width'];
$this->params['height'] = ceil ($h / $img_factor);
$this->keepTransparent($gdimage);
}
}

function resizeMin($w, $h)
{
if (!empty($this->params['height']) && !empty($this->params['width']))
{
$img_ratio = $w / $h;
$resize_ratio = $this->params['width'] / $this->params['height'];

if ($img_ratio < $resize_ratio)
{
// --- width
$this->params['height'] = ceil ($this->params['width'] / $w * $h);
$this->keepTransparent($gdimage);
}else
{
// --- height
$this->params['width'] = ceil ($this->params['height'] / $h * $w);
$this->keepTransparent($gdimage);
}
}elseif (!empty($this->params['height']))
{
$img_factor = $h / $this->params['height'];
$this->params['width'] = ceil ($w / $img_factor);
$this->keepTransparent($gdimage);
}elseif (!empty($this->params['width']))
{
$img_factor = $w / $this->params['width'];
$this->params['height'] = ceil ($h / $img_factor);
$this->keepTransparent($gdimage);
}
}


function keepTransparent($des)
{
$image = $this->image;
if ($image->getFormat() == 'PNG')
{
imagealphablending($des, false);
imagesavealpha($des, true);
}else if ($image->getFormat() == 'GIF')
{
$gdimage =& $image->getImage();
$colorTransparent = imagecolortransparent($gdimage);
imagepalettecopy($gdimage, $des);
if($colorTransparent>0)
{
imagefill($des, 0, 0, $colorTransparent);
imagecolortransparent($des, $colorTransparent);
}
imagetruecolortopalette($des, true, 256);
}
}

function getParams()
{
global $REX,$I18N;

return array(
array(
'label'=>$I18N->msg('imanager_effect_resize_width'),
'name' => 'width',
'type' => 'int',
),
array(
'label'=>$I18N->msg('imanager_effect_resize_height'),
'name' => 'height',
'type' => 'int'
),
array(
'label' => $I18N->msg('imanager_effect_resize_style'),
'name' => 'style',
'type' => 'select',
'options' => $this->options,
'default' => 'fit',
'suffix' => $this->script
),
array(
'label'=>$I18N->msg('imanager_effect_resize_imgtosmall'),
'name' => 'allow_enlarge',
'type' => 'select',
'options' => array('enlarge', 'not_enlarge'),
'default' => 'enlarge',
),
);
}
}

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