PHP image proportional scaling and adding detailed Logo watermark code and comments

PHP image proportional scaling and adding detailed Logo watermark code and comments

 Baidu's ""/*** proportional scaling function (implemented in storage mode) * @ param string $ picName scaled processing image source * @ param int $ maxx maximum width of the scaled image * @ param int $ maxy maximum height of the scaled image * @ param string $ prefix of the image name after pre scaling * @ return String the name of the image to be returned (for example, a.jpg => s_a.jpg */function imageNewageUpdateSize ($ picName, $ maxx = 100, $ maxy = 100, $ pre = "s _") {$ imageNewageInfo = getimageNewageSize ($ picName ); // obtain the basic information of the image $ w = $ imageNewageInfo [0]; // Obtain the width $ h = $ imageNewageInfo [1]; // Obtain the height/ /Obtain the image type and create the corresponding image resource switch ($ imageNewageInfo [2]) {case 1: // gif $ imageNew = imageNewagecreatefromgif ($ picName); break; case 2: // jpg $ imageNew = imageNewagecreatefromjpeg ($ picName); break; case 3: // png $ imageNew = imageNewagecreatefrompng ($ picName); break; default: die ("image type error! ");} // Calculate the zoom ratio if ($ maxx/$ w)> ($ maxy/$ h) {$ B = $ maxy/$ h ;} else {$ B = $ maxx/$ w;} // calculates the scaled size. $ nw = floor ($ w * $ B ); $ nh = floor ($ h * $ B); // create a new image source (target Image) $ nimageNew = imageNewagecreatetruecolor ($ nw, $ nh ); // execute proportional scaling imageNewagecopyresampled ($ nimageNew, $ imageNew, $ nw, $ nh, $ w, $ h ); // output image (the output is of the corresponding type based on the source image type) $ picimageNewageInfo = pathimageNewageInfo ($ picName ); // Parse the name and path of the source image $ newpicName = $ picimageNewageInfo ["dirname"]. "/". $ Pre. $ picimageNewageInfo ["basename"]; switch ($ imageNewageInfo [2]) {case 1: imageNewagegif ($ nimageNew, $ newpicName); break; case 2: imageNewagejpeg ($ nimageNew, $ newpicName); break; case 3: imageNewagepng ($ nimageNew, $ newpicName); break;} // release the image resource imageNewagedestroy ($ imageNew); imageNewagedestroy ($ nimageNew ); // return result return $ newpicName;} // call echo imageNewageUpdateSize (". /imageNewages/fig ", 400,400," ss _"); // The image you want to add yourself/*** add a logo image watermark to an image (saved) * @ param string $ picName source of the image to be processed * @ param string $ logo Watermark Image * @ param string $ prefix name of the image name after pre-processing * @ return String returns the name of the image to be returned (with parameters, for example, a.jpg => n_a.jpg * /function imageNewageUpdateLogo ($ picName, $ logo, $ pre = "n _") {$ picNameimageNewageInfo = getimageNewageSize ($ picName); // get the basic information of the image source $ logoimageNewageInfo = getimageNewageSize ($ logo ); // obtain the basic information of the logo image // var_dump ($ logoimageNew AgeInfo); // create the corresponding image source switch based on the image type ($ picNameimageNewageInfo [2]) {case 1: // gif $ imageNew = imageNewagecreatefromgif ($ picName); break; case 2: // jpg $ imageNew = imageNewagecreatefromjpeg ($ picName); break; case 3: // png $ imageNew = imageNewagecreatefrompng ($ picName); break; default: die ("incorrect image type! ") ;}// Create the corresponding image source switch based on the logo image type ($ logoimageNewageInfo [2]) {case 1: // gif $ logoimageNew = imageNewagecreatefromgif ($ logo ); break; case 2: // jpg $ logoimageNew = imageNewagecreatefromjpeg ($ logo); break; case 3: // png $ logoimageNew = imageNewagecreatefrompng ($ logo); break; default: die ("incorrect logo image type! ") ;}// Perform image watermark processing the height of the source image-the width of the source image of the logo image-the width of the logo image imageNewagecopyresampled ($ imageNew, $ logoimageNew, $ picNameimageNewageInfo [0]-$ logoimageNewageInfo [0], $ picNameimageNewageInfo [1]-$ logoimageNewageInfo [1], 0,0, $ logoimageNewageInfo [0], $ region [1], $ logoimageNewageInfo [0], $ logoimageNewageInfo [1]); // output image (the output is of the corresponding type based on the source image type) $ picimageNewageInfo = pathimageNewageInfo ($ picName ); // Parse the name and path of the source image $ newpicName = $ picimageNewageInfo ["dirname"]. "/". $ pre. $ picimageNewageInfo ["basename"]; switch ($ picNameimageNewageInfo [2]) {case 1: imageNewagegif ($ imageNew, $ newpicName); break; case 2: imageNewagejpeg ($ imageNew, $ newpicName); break; case 3: imageNewagepng ($ imageNew, $ newpicName); break;} // release the image resource imageNewagedestroy ($ imageNew); imageNewagedestroy ($ logoimageNew ); // return result return $ newpicName;} // Test // echo imageNewageUpdateLogo (". /imageNewages/leyangjun.jpg ",". /imageNewages/logo.png "); // add your image and the image watermark with your logo OK