PHP picture Specifies white overlay zoom

Encounter such a demand: the original size, and the size of the white is different, you need to cut out a core image, and then left the picture left and right, forming a picture of another size. In other words, the position of the original in the new picture can be controlled.

Here's the idea: Create a basemap of the specified size, then scale the original image and put it in the bottom picture, which is the picture overlay.

# # # #这里实现的是第二个箭头所示的效果.

(To finish the first arrow effect, please step http://www.cnblogs.com/haodaquan/p/6381636.html)

The following code is available for reference:

<?php/**************************************************************  @Description:   Picture Overlay Demo **  @Author: haodaquan**  @Date:   2016-11-30 12:07:51**  @Last   modified by:   haodaquan**  @Last  Modified time: 2017-02-09  13:59:51*************************************************************/header (' content-type:image/jpeg '); #图片显示 $ bg_width =  $bg _height = 600; #创建真彩色画布并填补灰色 $final _srouce        = imagecreatetruecolor ($BG _width, $BG _height); $background _color = imagecolorallocate ($ final_srouce,255,255,255); #白色底色imagefill ($final _srouce,0,0, $background _color);  #获取覆盖图片   Size 121*75$ source           =  '/Users/haodaquan/Sites/PyWeb/ Coreimage/newimage/new_image.jpg '; $img _source          =  imagecreatefromjpeg ($SOURCe); $info              = getimagesize ($ source); ###################### #1, directly overlay the picture onto the canvas   #前两个数字为画布起始xy坐标, the middle two numbers to cover the starting XY coordinates of the picture, and the last two numbers to indicate the XY length of the overlay image # Imagecopy ($final _srouce, $img _source,30,50,0,0,121,75), #新图宽度留白, height stay white $blank_width  = 30; $blank _ height = 50; #假设宽度优先填满新图, figure # Calculating zoom ratio $new_width  =  $BG _width-2* $blank _width $new _ height =  $info [1]* ($new _width/$info [0]) #2, with scaled overlay   See the bottom function Note imagecopyresampled ($final _srouce, $img _source, $blank _width, $blank _height,0,0, $new _width, $new _height, $info [0], $info [1]); ###################### imagejpeg ($final _srouce,  './tmp/final_srouce.jpeg ', +); #生成图片   The third parameter is quality [1-100]imagejpeg ($final _srouce );  #页面显示图片 # Destruction of resources Imagedestroy ($final _srouce); Imagedestroy ($img _source);// bool imagecopyresampled   ( resource  $dst _image , resource  $src _image , int  $dst _x   int  $DST _y , int  $src _x , int  $src _y , int  $dst _w , int  $dst _h   int  $src _w , int  $src _h )//  $dst _image: New picture//  $SRC _image: Images required to load//   $DST _x: Sets the x-coordinate//  of the image that needs to be loaded in the new diagram $DST _y: Sets the y-coordinate of the picture to be loaded in the new diagram//  $SRC _x: Sets the area x coordinates to load for loading the image//  $src _ Y: Sets the area y-coordinate to load the picture to load//  $dst _w: Sets the width of the original image to be loaded (scaled in this setting)//  $DST _h: Sets the height of the loaded original (zoom in this setting)//  $src _w: The width of the artwork to load//   $SRC _h: The height of the original image to be loaded

PHP picture Specifies white overlay zoom