| 标题 | php实现水印图功能 |
| 范文 | php实现水印图功能. 测试水印的文件代码： <?php require( './WaterMark.class.php' ); $water = new WaterMark( './images/psb.jpg', './images/200(1).jpg' ); $water->Exec( './images/w.jpg', 'center-center' ); ?> 水印功能的文件代码: <?php /** * Add water stain to specified image * @author pankai<> * @date 2013-09-27 */ class WaterMark { /* Image source path */ private $_src_path = NULL; private $_image_source = NULL; /* Water-Stain image source path */ private $_water_path = NULL; private $_water_source = NULL; private $_extension = NULL; public function __construct( $_src_path, $_water_path ) { $this->_src_path = $_src_path; $this->_water_path = $_water_path; } /** * Get image source form image designated path * @param $_img_path * @return resource */ private function getImageSource( $_img_path ) { $_path = explode( ".", strtolower( $_img_path ) ); $_bak = strtoupper( $_path[ sizeof( $_path ) - 1 ] ); $_img_source = NULL; $this->_extension = $_bak; switch( $_bak ) { case "GIF": $_img_source = @imagecreatefromgif( $_img_path ); break; case "JPG": case "JPEG": $_img_source = @imagecreatefromjpeg( $_img_path ); break; case "PNG": $_img_source = @imagecreatefrompng( $_img_path ); break; case "WBMP": $_img_source = @imagecreatefromwbmp( $_img_path ); break; } return $_img_source; } /** * Count coordinate * @param $direction string * @return array */ private function countArgs( &$_src, &$_water, $_direction ) { $_args = NULL; /** * Count the image's width and image's height * which are used to show Water-Stain image arbitrarily */ $src_x = imagesx( $_src ); $src_y = imagesy( $_src ); $water_x = imagesx( $_water ); $water_y = imagesy( $_water ); switch( strtolower( $_direction ) ) { case 'top-left': $_args = array( 0, 0 ); break; case 'top-center': $_args = array( floor( ( $src_x - $water_x ) / 2 ), 0 ); break; case 'top-right': $_args = array( $src_x - $water_x, 0 ); break; case 'center-left': $_args = array( 0, floor( ( $src_y - $water_y ) / 2 ) ); break; case 'center-center': $_args = array( floor( ( $src_x - $water_x ) / 2 ), floor( ( $src_y - $water_y ) / 2 ) ); break; case 'center-right': $_args = array( $src_x - $water_x, floor( ( $src_y - $water_y ) / 2 ) ); break; case 'bottom-left': $_args = array( 0, $src_y - $water_y ); break; case 'bottom-center': $_args = array( floor( ( $src_x - $water_x ) / 2 ), $src_y - $water_y ); break; case 'bottom-right': $_args = array( $src_x - $water_x, $src_y - $water_y ); break; } return $_args; } /** * The main programmer: copy Water-Stain image source into specified image source, * then save this into appointed path * @param $dst_name * @return bool */ public function Exec( $dst_name, $direction = 'bottom-right' ) { $this->_image_source = &$this->getImageSource( $this->_src_path ); $this->_water_source = &$this->getImageSource( $this->_water_path ); $water_x = imagesx( $this->_water_source ); $water_y = imagesy( $this->_water_source ); $_args = $this->countArgs( $this->_image_source, $this->_water_source, $direction ); $_copy = imagecopy( $this->_image_source, $this->_water_source, abs( $_args[ 0 ] ), abs( $_args[ 1 ] ), 0, 0, $water_x, $water_y ); $_out = true; /* imagejpeg( $this->img_dst, $dst_name, 100 ); */ switch ( $this->_extension ) { case 'GIF': $_out = imagegif( $this->_image_source, $dst_name ); break; case 'JPG': case 'JPEG': $_out = imagejpeg( $this->_image_source, $dst_name, 100 ); break; case 'PNG': $_out = imagepng( $this->_image_source, $dst_name ); break; case 'WBMP': $_out = imagewbmp( $this->_image_source, $dst_name ); } return $_copy && $_out; } } ?> |
| 随便看 |
|
在线学习网范文大全提供好词好句、学习总结、工作总结、演讲稿等写作素材及范文模板，是学习及工作的有利工具。