function bResizeImage($oPIn, $oPOut, $iW, $iH)
{
// replace the image with the resized one
global $goApp;
$bSuccess = false;
$rInImage = $rOutImage = false;
WYImage::_allocateMemoryForImage($oPIn);
if (!function_exists('imagejpeg')) {
$goApp->log('bResizeImage: no GD lib with JPEG support installed');
return false;
}
if (strtolower($oPIn->sExtension()) == 'jpg') {
if (!function_exists('imagecreatefromjpeg')) {
$goApp->log('bResizeImage: no imagecreatefromjpeg function found');
return false;
} else {
$rInImage = @imagecreatefromjpeg($oPIn->sPath);
}
} else {
if (strtolower($oPIn->sExtension()) == 'gif') {
if (!function_exists('imagecreatefromgif')) {
$goApp->log('bResizeImage: no imagecreatefromgif function found');
return false;
} else {
$rInImage = @imagecreatefromgif($oPIn->sPath);
}
} else {
if (strtolower($oPIn->sExtension()) == 'png') {
if (!function_exists('imagecreatefrompng')) {
$goApp->log('bResizeImage: no imagecreatefrompng function found');
return false;
} else {
$rInImage = @imagecreatefrompng($oPIn->sPath);
}
}
}
}
if (!$rInImage) {
$goApp->log('bResizeImage: could not create image from ' . $oPIn->sPath);
return false;
}
if (WYImage::bGD2Installed() && function_exists('imagecreatetruecolor')) {
$rOutImage = @imagecreatetruecolor($iW, $iH);
} else {
if (function_exists('imagecreate')) {
$rOutImage = @imagecreate($iW, $iH);
}
}
if (!$rOutImage) {
$goApp->log("bResizeImage: could not create output image of size {$iW}/{$iH}");
return false;
}
// preserve transparency
if (strtolower($oPIn->sExtension()) == 'gif' || strtolower($oPIn->sExtension()) == 'png') {
if (function_exists('imagecolortransparent') && function_exists('imagecolorallocatealpha') && function_exists('imagealphablending') && function_exists('imagesavealpha')) {
@imagecolortransparent($rOutImage, @imagecolorallocatealpha($rOutImage, 0, 0, 0, 127));
@imagealphablending($rOutImage, false);
@imagesavealpha($rOutImage, true);
} else {
$goApp->log('bResizeImage: unable to create transparent image');
}
}
if (WYImage::bGD2Installed() && function_exists('imagecopyresampled')) {
$bSuccess = @imagecopyresampled($rOutImage, $rInImage, 0, 0, 0, 0, $iW, $iH, imagesx($rInImage), imagesy($rInImage));
}
if (!$bSuccess && function_exists('imagecopyresized')) {
$bSuccess = @imagecopyresized($rOutImage, $rInImage, 0, 0, 0, 0, $iW, $iH, imagesx($rInImage), imagesy($rInImage));
}
if (!$bSuccess) {
$goApp->log('bResizeImage: could not use imagecopyresampled or imagecopyresized');
return false;
}
unset($rInImage);
// close input file
switch (strtolower($oPIn->sExtension())) {
// save image as the right file type
case 'gif':
$bSuccess = @imagegif($rOutImage, $oPOut->sPath);
break;
case 'png':
$bSuccess = @imagepng($rOutImage, $oPOut->sPath, 9);
break;
case 'jpg':
$bSuccess = @imagejpeg($rOutImage, $oPOut->sPath, 100);
break;
case 'jpeg':
$bSuccess = @imagejpeg($rOutImage, $oPOut->sPath, 100);
break;
}
chmod($oPIn->sPath, 0644);
if (!$bSuccess) {
$goApp->log("bResizeImage: could not create output image");
}
return $bSuccess;
}
