Php code for generating image thumbnails

Php code for generating image thumbnails

Multiple types of thumbnails are generated. /*************************************** * Author: beluckly) * Completion Time: 2006-12-18 * Class name: CreatMiniature * Function: generate various types of thumbnails. * Basic parameters: $ srcFile, $ echoType * Parameters used by the method: $ ToFile: the generated file. $ ToW: the generated width. $ ToH, the generated height $ Bk1. The highest background color parameter is 255. $ Bk2, background color parameter $ Bk3, background color parameter * Example: Include ("thumb. php "); $ Cm = new CreatMiniature (); $ Cm-> SetVar ("1.jpg"," file "); $ Cm-> Distortion ("dis_bei.jpg", 150,200 ); $ Cm-> Prorate ("pro_bei.jpg", 150,200 ); $ Cm-& gt; Cut ("cut_bei.jpg", 150,200 ); $ Cm-> BackFill ("fill_bei.jpg", 150,200 ); ***************************************/ Class CreatMiniature { // Public variables Var $ srcFile = ""; // source image Var $ echoType; // The type of the output image, link -- not saved as a file; file -- saved as a file Var $ im = ""; // temporary variable Var $ srcW = ""; // source image width Var $ srcH = ""; // original height // Set variables and initialization Function SetVar ($ srcFile, $ echoType) { $ This-> srcFile = $ srcFile; $ This-> echoType = $ echoType; $ Info = ""; $ Data = GetImageSize ($ this-> srcFile, $ info ); Switch ($ data [2]) { Case 1: If (! Function_exists ("imagecreatefromgif ")){ Echo "your GD library cannot use images in GIF format. please use Jpeg or PNG format! Return "; Exit (); } $ This-> im = ImageCreateFromGIF ($ this-> srcFile ); Break; Case 2: If (! Function_exists ("imagecreatefromjpeg ")){ Echo "your GD library cannot use images in jpeg format. please use images in other formats! Return "; Exit (); } $ This-> im = ImageCreateFromJpeg ($ this-> srcFile ); Break; Case 3: $ This-> im = ImageCreateFromPNG ($ this-> srcFile ); Break; } $ This-> srcW = ImageSX ($ this-> im ); $ This-> srcH = ImageSY ($ this-> im ); } // Generate a distorted thumbnail Function Distortion ($ toFile, $ toW, $ toH) { $ CImg = $ this-> CreatImage ($ this-> im, $ toW, $ toH, 0, 0, 0, $ this-> srcW, $ this-> srcH ); Return $ this-> EchoImage ($ cImg, $ toFile ); ImageDestroy ($ cImg ); } // Generate a scaled chart Function Prorate ($ toFile, $ toW, $ toH) { $ ToWH = $ toW/$ toH; $ SrcWH = $ this-> srcW/$ this-> srcH; If ($ toWH <= $ srcWH) { $ FtoW = $ toW; $ FtoH = $ ftoW * ($ this-> srcH/$ this-> srcW ); } Else { $ FtoH = $ toH; $ FtoW = $ ftoH * ($ this-> srcW/$ this-> srcH ); } If ($ this-> srcW> $ toW | $ this-> srcH> $ toH) { $ CImg = $ this-> CreatImage ($ this-> im, $ ftoW, $ ftoH, 0, 0, 0, $ this-> srcW, $ this-> srcH ); Return $ this-> EchoImage ($ cImg, $ toFile ); ImageDestroy ($ cImg ); } Else { $ CImg = $ this-> CreatImage ($ this-> im, $ this-> srcW, $ this-> srcH, 0, 0, 0, $ this-> srcW, $ this-> srcH ); Return $ this-> EchoImage ($ cImg, $ toFile ); ImageDestroy ($ cImg ); } } // Generate a thumbnail after minimum cropping Function Cut ($ toFile, $ toW, $ toH) { $ ToWH = $ toW/$ toH; $ SrcWH = $ this-> srcW/$ this-> srcH; If ($ toWH <= $ srcWH) { $ CtoH = $ toH; $ CtoW = $ ctoH * ($ this-> srcW/$ this-> srcH ); } Else { $ CtoW = $ toW; $ CtoH = $ ctoW * ($ this-> srcH/$ this-> srcW ); } $ AllImg = $ this-> CreatImage ($ this-> im, $ ctoW, $ ctoH, 0, 0, 0, $ this-> srcW, $ this-> srcH ); $ CImg = $ this-> CreatImage ($ allImg, $ toW, $ toH, 0, ($ ctoW-$ toW)/2, ($ ctoH-$ toH)/2, $ toW, $ toH ); Return $ this-> EchoImage ($ cImg, $ toFile ); ImageDestroy ($ cImg ); ImageDestroy ($ allImg ); } // Generate a thumbnail for background filling Function BackFill ($ toFile, $ toW, $ toH, $ bk1 = 255, $ bk2 = 255, $ bk3 = 255) { $ ToWH = $ toW/$ toH; $ SrcWH = $ this-> srcW/$ this-> srcH; If ($ toWH <= $ srcWH) { $ FtoW = $ toW; $ FtoH = $ ftoW * ($ this-> srcH/$ this-> srcW ); } Else { $ FtoH = $ toH; $ FtoW = $ ftoH * ($ this-> srcW/$ this-> srcH ); } If (function_exists ("imagecreatetruecolor ")) { @ $ CImg = ImageCreateTrueColor ($ toW, $ toH ); If (! $ CImg) { $ CImg = ImageCreate ($ toW, $ toH ); } } Else { $ CImg = ImageCreate ($ toW, $ toH ); } $ Backcolor = imagecolorallocate ($ cImg, $ bk1, $ bk2, $ bk3); // fill in the background color ImageFilledRectangle ($ cImg, 0, 0, $ toW, $ toH, $ backcolor ); If ($ this-> srcW> $ toW | $ this-> srcH> $ toH) { $ ProImg = $ this-> CreatImage ($ this-> im, $ ftoW, $ ftoH, 0, 0, 0, $ this-> srcW, $ this-> srcH ); /* If ($ ftoW <$ toW) { ImageCopyMerge ($ cImg, $ proImg, ($ toW-$ ftoW)/100, $ ftoW, $ ftoH ); } Else if ($ ftoH <$ toH) { ImageCopyMerge ($ cImg, $ proImg, 0, ($ toH-$ ftoH)/100, 0, $ ftoW, $ ftoH ); } */ If ($ ftoW <$ toW) { ImageCopy ($ cImg, $ proImg, ($ toW-$ ftoW)/2, 0, 0, $ ftoW, $ ftoH ); } Else if ($ ftoH <$ toH) { ImageCopy ($ cImg, $ proImg, 0, ($ toH-$ ftoH)/2,0, 0, $ ftoW, $ ftoH ); } Else { ImageCopy ($ cImg, $ proImg, 0, 0, 0, $ ftoW, $ ftoH ); } } Else { ImageCopyMerge ($ cImg, $ this-> im, ($ toW-$ ftoW)/2, ($ toH-$ ftoH)/2,0, 0, $ ftoW, $ ftoH, 100 ); } Return $ this-> EchoImage ($ cImg, $ toFile ); ImageDestroy ($ cImg ); } Function CreatImage ($ img, $ creatW, $ creatH, $ dstX, $ dstY, $ srcX, $ srcY, $ srcImgW, $ srcImgH) { If (function_exists ("imagecreatetruecolor ")) { @ $ CreatImg = ImageCreateTrueColor ($ creatW, $ creatH ); If ($ creatImg) ImageCopyResampled ($ creatImg, $ img, $ dstX, $ dstY, $ srcX, $ srcY, $ creatW, $ creatH, $ srcImgW, $ srcImgH ); Else { $ CreatImg = ImageCreate ($ creatW, $ creatH ); ImageCopyResized ($ creatImg, $ img, $ dstX, $ dstY, $ srcX, $ srcY, $ creatW, $ creatH, $ srcImgW, $ srcImgH ); } } Else { $ CreatImg = ImageCreate ($ creatW, $ creatH ); ImageCopyResized ($ creatImg, $ img, $ dstX, $ dstY, $ srcX, $ srcY, $ creatW, $ creatH, $ srcImgW, $ srcImgH ); } Return $ creatImg; } // Output image, link --- only output, not save file. File -- save as a file Function EchoImage ($ img, $ to_File) { Switch ($ this-> echoType) { Case "link ": If (function_exists ('imagejpeg ') return imagejpeg ($ img ); Else return ImagePNG ($ img ); Break; Case "file ": If (function_exists ('imagejpeg ') return imagejpeg ($ img, $ to_File ); Else return ImagePNG ($ img, $ to_File ); Break; } } } ?>

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