Get image height and width.

[ghouser]

Is there a method to get the the height and width of a .gif or .jpg? I plan to use cffile to grab the file name to place in a db record. This record also needs to contain the heigth and width of the graphic.

I attempted to use the Java written by Peter Crowley to do this but get the following error when I upload to my host server. It works fine on my localhost however.

Error: You have attempted to dereference a scalar variable of type class java.lang.String as a structure with members.

[Kevin_Schmidt]

Post the code that is giving you the errors. It doesn't seem like something is right.

[ghouser]

No prob. I am going to omit the actual domain in the code however. I'll post both the "uplaod.cfm" and the resulting page "imagesize.cfm". You can find the download on cflib.org at this URL: http://www.cflib.org/udf.cfm?ID=1019

<--- upload.cfm ---->
<center>Click here to upload:
<cfif isdefined("form.upload_now")>
<cffile action="upload" filefield="ul_path" destination= "d:\web\vhosts\aasrdanville.com\httpdocs\eventpics\" nameconflict="overwrite">
</cfif>
<form action="imagesize.cfm" method="post" name="upload_form" enctype="multipart/form-data" id="upload_form">
<input type="File" name="ul_path" size="90" id="ul_path">
<input type="submit" name="upload_now" value="Submit"></center>
</form>

<---- imagesize.cfm ---->
<cfscript>
/**
* Returns width and height of images based on image type.
*
* @param filename Absolute or relative path to file. (Required)
* @param mimetype Minetype for the file. (Optional)
* @return Returns a struct containing height and width information, or an error string.
* @author Peter Crowley (&#112;&#99;&#114;&#111;&#119;&#108;&#101;&#121;&#64;&#119;&#101;&#98;&#122;&#111;&#110;&#101;&#46;&#105;&#101;)
* @version 1, August 17, 2006
*/
function ImageSize(filename) {
// Jpeg variables
var nFileLength=0; var nBlockLength=0; var nMarker=0;
var nSOI = 65496; // Start of Image (FFD8)
var nEOI = 65497; // End of Image (FFD9)
var nSOF = 65472; // Start of frame nMarker (FFC0)
var nSOF1 = 65473; // Start of frame extended sequential mode (FFC1)
var nSOF2 = 65474; // Start of frame progressive mode (FFC2)
var nSOF3 = 65475; // Start of frame lossless mode (FFC3)
var nSOS = 65498; // Start of Scan (FFDA)


var sImageType = "";
var kCoords = structNew();
var fInput = 0;
var sByte=0;
var sFullPath="";
var sMimeType = "";

if (Left(filename,1) IS "/" OR Left(filename,1) IS "\" OR MID(filename,2,1) IS ":")
sFullPath=filename;
else
sFullPath=ExpandPath(filename);

// Establish image type
if(arrayLen(arguments) gt 1) { //optional mimetype
sMimeType = arguments[2];
if (LCase(ListFirst(sMimeType,"/")) IS NOT "image") return "Wrong mime type";
if (ListLen(sMimeType,"/") NEQ 2) return "Invalid mime type";
sImageType=LCase(ListLast(sMimeType,"/"));
} else { // work off file extension
if (ListLen(filename,".") LT 2) return "Unknown image type";
sImageType=LCase(ListLast(filename,"."));
}

if(not fileExists(sFullPath)) return "File does not exist.";

//make a fileInputStream object to read the file into
fInput = createObject("java","java.io.RandomAccessFile").init(sFullPath,"r");

// Get X,Y resolution sizes for each image type supported
switch (sImageType) {
case "jpg": case "jpeg":
do {
nMarker = fInput.readUnsignedShort();

if (nMarker NEQ nSOI AND nMarker NEQ nEOI AND nMarker NEQ nSOS) {

nBlockLength = fInput.readUnsignedShort();

if (nMarker EQ nSOF OR nMarker EQ nSOF1 OR nMarker EQ nSOF2 OR nMarker EQ nSOF3) { // Start of frame
fInput.readUnsignedByte(); // skip sample precision in bits
kCoords.ImageHeight = fInput.readUnsignedShort();
kCoords.ImageWidth = fInput.readUnsignedShort();
fInput.close();
return kCoords;
} else {
fInput.skipBytes(JavaCast("int",nBlockLength-2));
}
}
} while (BitSHRN(nMarker,8) EQ 255 AND nMarker NEQ nEOI);
break;
case "gif":
fInput.skipBytes(6);

sByte = fInput.readUnsignedByte();
kCoords.ImageHeight = fInput.readUnsignedByte() * 256 + sByte;

sByte = fInput.readUnsignedByte();
kCoords.ImageWidth = fInput.readUnsignedByte() * 256 + sByte;

fInput.close();
return kCoords;
default:
break;
}
//close out this entry
fInput.close();
return "Unhandled image type";
}
</cfscript>

<CFSCRIPT>
kImageSize = ImageSize("./images/decembers_rose_cast.jpg.jpg");
</CFSCRIPT>

<CFOUTPUT>
#kImageSize.ImageWidth#<BR/>
#kImageSize.ImageHeight#
</CFOUTPUT>