oxutilspic.php

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<?php

class oxUtilsPic extends oxSuperCfg
{
    protected $_aImageTypes = array("GIF" => IMAGETYPE_GIF, "JPG" => IMAGETYPE_JPEG, "PNG" => IMAGETYPE_PNG);

    private static $_instance = null;

    public static function getInstance()
    {
        // disable caching for test modules
        if ( defined( 'OXID_PHP_UNIT' ) ) {
            static $inst = array();
            self::$_instance = $inst[oxClassCacheKey()];
        }

        if ( !self::$_instance instanceof oxUtilsPic ) {


            self::$_instance = oxNew( 'oxUtilsPic' );

            if ( defined( 'OXID_PHP_UNIT' ) ) {
                $inst[oxClassCacheKey()] = self::$_instance;
            }
        }
        return self::$_instance;
    }


    public function resizeImage( $sSrc, $sTarget, $iDesiredWidth, $iDesiredHeight )
    {
        $blResize = false;
        $myConfig = $this->getConfig();

        // use this GD Version
        if ( ( $iUseGDVersion = $myConfig->getConfigParam( 'iUseGDVersion' ) ) &&
               function_exists( 'imagecreate' ) && file_exists( $sSrc ) &&
              ( $aImageInfo = @getimagesize( $sSrc ) ) ) {

            // #1837/1177M - do not resize smaller pictures
            if ( $iDesiredWidth < $aImageInfo[0] || $iDesiredHeight < $aImageInfo[1] ) {
                if ( $aImageInfo[0] >= $aImageInfo[1]*( (float) ( $iDesiredWidth / $iDesiredHeight ) ) ) {
                    $iNewHeight = round( ( $aImageInfo[1] * (float) ( $iDesiredWidth / $aImageInfo[0] ) ), 0 );
                    $iNewWidth = $iDesiredWidth;
                } else {
                    $iNewHeight = $iDesiredHeight;
                    $iNewWidth = round( ( $aImageInfo[0] * (float) ( $iDesiredHeight / $aImageInfo[1] ) ), 0 );
                }
            } else {
                $iNewWidth = $aImageInfo[0];
                $iNewHeight = $aImageInfo[1];
            }

            if ( $iUseGDVersion == 1) {
                $hDestinationImage = imagecreate( $iNewWidth, $iNewHeight );
            } else {
                $hDestinationImage = imagecreatetruecolor( $iNewWidth, $iNewHeight );
            }

            $blResize = $this->_resize( $aImageInfo, $sSrc, $hDestinationImage, $sTarget, $iNewWidth, $iNewHeight, $iUseGDVersion, $myConfig->getConfigParam( 'blDisableTouch' ), $myConfig->getConfigParam( 'sDefaultImageQuality' ) );
        }
        return $blResize;
    }


    public function safePictureDelete( $sPicName, $sAbsDynImageDir, $sTable, $sField )
    {
        $blDelete = false;
        if ( $this->_isPicDeletable( $sPicName, $sTable, $sField ) ) {
            $blDelete = $this->_deletePicture( $sPicName, $sAbsDynImageDir );
        }
        return $blDelete;
    }

    protected function _deletePicture( $sPicName, $sAbsDynImageDir )
    {
        $blDeleted = false;
        $myConfig  = $this->getConfig();

        if ( !$myConfig->isDemoShop() && ( strpos( $sPicName, 'nopic.jpg' ) === false
                || strpos( $sPicName, 'nopic_ico.jpg' ) === false ) ) {

            $sFile = "$sAbsDynImageDir/$sPicName";
            if ( file_exists( $sFile ) ) {
                $blDeleted = unlink( $sFile );
            }

            // additionally deleting icon ..
            $sIconFile = eregi_replace( "(\.[a-z0-9]*$)", "_ico\\1", $sFile );
            if ( file_exists( $sIconFile ) ) {
                unlink( $sIconFile );
            }
        }
        return $blDeleted;
    }


    protected function _isPicDeletable( $sPicName, $sTable, $sField )
    {
        if ( !$sPicName || strpos( $sPicName, 'nopic.jpg' ) !== false || strpos( $sPicName, 'nopic_ico.jpg' ) !== false ) {
            return false;
        }

        $iCountUsed = oxDb::getDb()->getOne( "select count(*) from $sTable where $sField = '$sPicName' group by $sField " );

        if ( $iCountUsed > 1) {
            return false;
        }
        return true;
    }

    public function overwritePic( $oObject, $sPicTable, $sPicField, $sPicType, $sPicDir, $aParams, $sAbsDynImageDir )
    {
        $blDelete = false;
        $sPic = $sPicTable.'__'.$sPicField;
        if ( isset( $oObject->{$sPic} ) &&
             ( $_FILES['myfile']['size'][$sPicType.'@'.$sPic] > 0 || $aParams[$sPic] != $oObject->{$sPic}->value ) ) {
            $blDelete = $this->safePictureDelete($oObject->{$sPic}->value, $sAbsDynImageDir, $sPicTable, $sPicField );
        }

        return $blDelete;
    }

    public function iconName( $sFilename )
    {
        $sIconName = eregi_replace( '(\.jpg|\.gif|\.png)$', '_ico\\1', $sFilename );

        return $sIconName;
    }


    protected function _resizeGif( $sSrc, $sTarget, $iNewWidth, $iNewHeight, $iOriginalWidth, $iOriginalHeigth, $iGDVer, $blDisableTouch )
    {
        $hDestinationImage = imagecreate( $iNewWidth, $iNewHeight );
        $hSourceImage = imagecreatefromgif( $sSrc );
        $iTransparentColor = imagecolorresolve( $hSourceImage, 255, 255, 255 );
        $iFillColor = imagecolorresolve( $hDestinationImage, 255, 255, 255 );
        imagefill( $hDestinationImage, 0, 0, $iFillColor );
        imagecolortransparent( $hSourceImage, $iTransparentColor );

        if ( $iGDVer == 1 ) {
            imagecopyresized( $hDestinationImage, $hSourceImage, 0, 0, 0, 0, $iNewWidth, $iNewHeight, $iOriginalWidth, $iOriginalHeigth );
        } else {
            imagecopyresampled( $hDestinationImage, $hSourceImage, 0, 0, 0, 0, $iNewWidth, $iNewHeight, $iOriginalWidth, $iOriginalHeigth );
        }

        imagecolortransparent( $hDestinationImage, $fillColor );
        if ( !$blDisableTouch ) {
            touch( $sTarget );
        }
        imagegif( $hDestinationImage, $sTarget );
        imagedestroy( $hDestinationImage );
        imagedestroy( $hSourceImage );
        return true;
    }

    protected function _resize( $aImageInfo, $sSrc, $hDestinationImage, $sTarget, $iNewWidth, $iNewHeight, $iGdVer, $blDisableTouch, $iDefQuality )
    {
        startProfile("PICTURE_RESIZE");

        $blSuccess = false;
        switch ( $aImageInfo[2] ) {    //Image type
            case ( $this->_aImageTypes["GIF"] ):
                //php does not process gifs until 7th July 2004 (see lzh licensing)
                if ( function_exists( "imagegif" ) ) {
                    imagedestroy( $hDestinationImage );
                    $blSuccess = $this->_resizeGif( $sSrc, $sTarget, $iNewWidth, $iNewHeight, $aImageInfo[0], $aImageInfo[1], $iGdVer, $blDisableTouch );
                }
                break;
            case ( $this->_aImageTypes["JPG"] ):
                $hSourceImage = imagecreatefromjpeg( $sSrc );
                if ( $this->_copyAlteredImage( $hDestinationImage, $hSourceImage, $iNewWidth, $iNewHeight, $aImageInfo, $sTarget, $iGdVer, $blDisableTouch ) ) {
                    imagejpeg( $hDestinationImage, $sTarget, $iDefQuality );
                    imagedestroy( $hDestinationImage );
                    imagedestroy( $hSourceImage );
                    $blSuccess = true;
                }
                break;
            case ( $this->_aImageTypes["PNG"] ):
                $hSourceImage = imagecreatefrompng( $sSrc );

                if ( !imageistruecolor( $hSourceImage ) ) {
                    $hDestinationImage = imagecreate( $iNewWidth, $iNewHeight );
                }

                // fix for transparent images sets image to transparent
                $imgWhite = imagecolorallocate( $hDestinationImage, 255, 255, 255 );
                imagefill( $hDestinationImage, 0, 0, $imgWhite );
                imagecolortransparent( $hDestinationImage, $imgWhite );
                //end of fix

                if ( $this->_copyAlteredImage( $hDestinationImage, $hSourceImage, $iNewWidth, $iNewHeight, $aImageInfo, $sTarget, $iGdVer, $blDisableTouch ) ) {
                    imagepng( $hDestinationImage, $sTarget );
                    imagedestroy( $hDestinationImage );
                    imagedestroy( $hSourceImage );
                    $blSuccess = true;
                }
                break;
        }

        stopProfile("PICTURE_RESIZE");

        return $blSuccess;
    }

    protected function _copyAlteredImage( $sDestinationImage, $sSourceImage, $iNewWidth, $iNewHeight, $aImageInfo, $sTarget, $iGdVer, $blDisableTouch )
    {
        if ( $iGdVer == 1 ) {
            $blSuccess = imagecopyresized( $sDestinationImage, $sSourceImage, 0, 0, 0, 0, $iNewWidth, $iNewHeight, $aImageInfo[0], $aImageInfo[1] );
        } else {
            $blSuccess = imagecopyresampled( $sDestinationImage, $sSourceImage, 0, 0, 0, 0, $iNewWidth, $iNewHeight, $aImageInfo[0], $aImageInfo[1] );
        }

        if ( !$blDisableTouch && $blSuccess ) {
            @touch( $sTarget );
        }

        return $blSuccess;
    }

}

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