Fusion of jpge and png pictures-PHP Tutorial-php.cn

Fusion of jpge and png pictures

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Release： 2016-07-25 09:08:56

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The fusion of jpge images and png images is actually the watermark technology that everyone is familiar with. The most important sentence in the code below is:

//Set the color blending mode of the image
imagealphablending($ground_im, true);

/*
* Function: PHP image watermark (watermark supports images or text)
* Parameters:
* $groundImage background image, that is, the image that needs to be watermarked, currently only supports GIF, JPG, PNG format;
* $waterPos watermark position, there are 10 states, 0 is a random position;
* 1 is the top left, 2 is the top center, 3 is the top right;
* 4 is the middle left, 5 is the middle center, 6 means the middle is on the right;
* 7 is on the bottom on the left, 8 is on the bottom in the center, 9 is on the bottom on the right;
* $waterImage image watermark, that is, the image used as the watermark, currently only supports GIF, JPG, and PNG formats;
* $waterText text watermark, that is, text is used as a watermark, supports ASCII code, does not support Chinese;
* $textFont text size, the value is 1, 2, 3, 4 or 5, the default is 5;
* $textColor text Color, the value is a hexadecimal color value, the default is #FF0000 (red);
*
* Note: Support GD 2.0, Support FreeType, GIF Read, GIF Create, JPG, PNG
* $waterImage and $waterText are best Don't use them at the same time, just choose one of them, and use $waterImage first.
* When $waterImage is valid, the parameters $waterString, $stringFont, and $stringColor are not valid.
* The file name of the watermarked image is the same as $groundImage.
* Author: longware @ 2004-11-3 14:15:13
*/
function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="",$textFont=5,$ textColor="#FF0000")
//function imageWaterMark($groundImage,$waterPos=0,$waterImage,$waterText=,$textFont=5,$textColor=#FF0000″)
{
$isWaterImage = FALSE;
$ formatMsg = "This file format is not supported yet. Please use image processing software to convert the image to GIF, JPG, or PNG format.";
//Read watermark file
if(!empty($waterImage) && file_exists($waterImage))
{
$isWaterImage = TRUE;
$water_info = getimagesize($waterImage);
$water_w = $water_info[ 0];//Get the width of the watermark image
$water_h = $water_info[1];//Get the height of the watermark image
switch($water_info[2])//Get the format of the watermark image
{
case 1:$ water_im = imagecreatefromgif($waterImage);break;
case 2:$water_im = imagecreatefromjpeg($waterImage);break;
case 3:$water_im = imagecreatefrompng($waterImage);break;
default:die($formatMsg);
}
}
//Read? Chenbaji?
if(!empty($groundImage) && file_exists($groundImage))
{
$ground_info = getimagesize($groundImage);
$ground_w = $ground_info[0]; //Get the width of the background image
$ground_h = $ground_info[1];//Get the height of the background image
switch($ground_info[2])//Get the format of the background image
{
case 1:$ground_im = imagecreatefromgif ($groundImage);break;
case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
case 3:$ground_im = imagecreatefrompng($groundImage);break;
default:die($formatMsg);
}
}
else
{
die("The picture that needs to be watermarked does not exist!");
}
//Watermark position
if($isWaterImage)//Picture watermark
{
$w = $water_w;
$h = $ water_h;
$label = "Picture";
}
else//Text watermark
{
$temp = imagettfbbox(ceil($textFont*5),0,"./cour.ttf",$waterText);/ /Get the range of text using TrueType font
$w = $temp[2] - $temp[6];
$h = $temp[3] - $temp[7];
unset($temp);
$ label = "text area";
}
if( ($ground_w<$w) || ($ground_h<$h) )
{
echo "The length or width of the image that needs to be watermarked is greater than the watermark".$label. "It's too young to generate a watermark! ";
return;
}
switch($waterPos)
{
case 0://random
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ground_h - $h));
break;
case 1://1 is top left
$posX = 0;
$posY = 0;
break;
case 2://2 is top center
$posX = ($ ground_w - $w) / 2;
$posY = 0;
break;
case 3://3 is top right
$posX = $ground_w - $w;
$posY = 0;
break;
case 4 ://4 means center left
$posX = 0;
$posY = ($ground_h - $h) / 2;
break;
case 5://5 means center center
$posX = ($ground_w - $w ) / 2;
$posY = ($ground_h - $h) / 2;
break;
case 6://6 is the center right
$posX = $ground_w - $w;
$posY = ($ground_h - $h) / 2;
break;
case 7://7 means the bottom is on the left
$posX = 0;
$posY = $ground_h - $h;
break;
case 8://8 means the bottom is in the center
$posX = ($ground_w - $w) / 2;
$posY = $ground_h - $h;
break;
case 9://9 is bottom right
$posX = $ground_w - $w;
$posY = $ground_h - $h;
break;
default://random
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ground_h - $h) );
break;
}
//Set the color mixing mode of the image
imagealphablending($ground_im, true);
if($isWaterImage)//Image watermark
{
imagecopy($ground_im, $water_im, $posX, $ posY, 0, 0, $water_w,$water_h);//Copy the watermark to the target file
}
else//Text watermark
{
if( !empty($textColor) && (strlen($textColor)==7) )
{
$R = hexdec(substr($textColor,1,2));
$G = hexdec(substr($textColor,3,2));
$B = hexdec(substr($textColor,5) );
}
else
{
die("The watermark text color format is incorrect! ");
}
imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));
}
//The image after generating the watermark
@unlink($groundImage);
switch($ground_info[2])//Get the format of the background image
{
case 1:imagegif($ground_im,$groundImage);break;
case 2:imagejpeg($ground_im,$ groundImage);break;
case 3:imagepng($ground_im,$groundImage);break;
default:die($errorMsg);
}
//Release memory
if(isset($water_info)) unset($water_info );
if(isset($water_im)) imagedestroy($water_im);
unset($ground_info);
imagedestroy($ground_im);
}
$uploadfile="your_picture.jpg"; //Background image to be processed Position
$waterImage="Hat.png"; //Transparent image position
imageWaterMark($uploadfile,9,$waterImage);
//Displayed on the web
echo "";
?>

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