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  • choosing an image locally from http url and serving that image without a server round trip

    - by serverman
    Hi folks I am a complete novice to Flash (never created anything in flash). I am quite familiar with web applications (J2EE based) and have a reasonable expertise in Javascript. Here is my requirement. I want the user to select (via an html form) an image. Normally in the post, this image would be sent to server and may be stored there to be served later. I do not want that. I want to store this image locally and then serve it via HTTP to the user. So, the flow is: 1. Go to the "select image url":mywebsite.com/selectImage Browse the image and select the image This would transfer control locally to some code running on the client (Javascript or flash), which would then store the image locally at some place on the client machine. Go to the "show image url": mywebsite.com/showImage This would eventually result in some client code running on the browser that retrieves the image and renders it (without any server round trips.) I considered the following options: Use HTML5 local storage. Since I am a complete novice to flash, I looked into this. I found that it is fairly straightforward to store and retrieve images in javascript (only strings are allowed but I am hoping storing base64 encoded strings would work at least for small images). However, how do I serve the image via http url that points to my server without a server round trip? I saw the interesting article at http://hacks.mozilla.org/category/fileapi/ but that would work only in firefox and I need to work on all latest browsers (at least the ones supporting HTML5 local storage) Use flash SharedObjects. OK, this would have been good - the only thing is I am not sure where to start. Snippets of actionscripts to do this are scattered everywhere but I do not know how to use those scripts in an actual html page:) I do not need to create any movies or anything - just need to store an image and serve it locally. If I go this route, I would also use it to store other "strings" locally. If you suggest this, please give me the exact steps (could be pointers to other web sites) on how to do this. I would like to avoid paying for any flash development environment software ideally:) Thank you!

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  • Decoding ima4 audio format

    - by MrDatabase
    To reduce the download size of an iPhone application I'm compressing some audio files. Specifically I'm using afconvert on the command line to change .wav format to .caf format w/ ima4 compression. I've read this (wooji-juice.com) awesome post about this exact topic. I'm having trouble w/ the "decoding ima4 packets" step. I've looked at their sample code and I'm stuck. Please help w/ some pseudo code or sample code that can guide me in the right direction. Thanks! Additional info: Here is what I've completed and where I'm having trouble... I can play .wav files in both the simulator and on the phone. I can compress .wav files to .caf w/ ima4 compression using afconvert on the command line. I'm using the SoundEngine that came w/ CrashLanding (I fixed one memory leak). I modified the SoundEngine code to look for the mFormatID 'ima4'. I don't understand the blog post linked above starting w/ "Calculating the size of the unpacked data". Why do I need to do this? Also, what does the term "packet" refer to? I'm very new to any sort of audio programming.

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  • Versioning freindly, extendible binary file format

    - by Bas Bossink
    In the project I'm currently working on there is a need to save a sizeable data structure to disk. Being in optimist I thought their must be a standard solution for such a problem however upto now I haven't found a solution that satisfies the following requirements: .net 2.0 support, preferably with a foss implementation version friendly (this should be interpreted as reading an old version of the format should be relatively simple if the changes in the underlying data structure are simple, say adding/dropping fields) ability to do some form of random access where part of the data can be extended after initial creation (think of this as extending intermediate results) space and time efficient (xml has been excluded as option given this requierement) Options considered so far: Protocol Buffers : was turned down by verdict of the documentation about Large Data Sets since this comment suggest adding another layer on top, this would call for additional complexity which I wish to have handled by the file format itself. HDF5,EXI : do not seem to have .net implementations SQLite : the data structure at hand would result in a pretty complex table structure that seems to heavyweight for the intended use BSON : does not appear to support requirement 3. Fast Infoset : only seems to have buyware .net implementations Any recommendations or pointers are greatly appreciated. Furthermore if you believe any of the information above is not true please provide pointers/examples to proove me wrong.

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  • Versioning friendly, extendible binary file format

    - by Bas Bossink
    In the project I'm currently working on there is a need to save a sizable data structure to disk (edit: think dozens of MB's). Being an optimist, I thought that there must be a standard solution for such a problem; however, up to now I haven't found a solution that satisfies the following requirements: .NET 2.0 support, preferably with a FOSS implementation Version friendly (this should be interpreted as: reading an old version of the format should be relatively simple if the changes in the underlying data structure are simple, say adding/dropping fields) Ability to do some form of random access where part of the data can be extended after initial creation (think of this as extending intermediate results) Space and time efficient (XML has been excluded as option given this requirement) Options considered so far: Protocol Buffers: was turned down by verdict of the documentation about Large Data Sets - since this comment suggested adding another layer on top, this would call for additional complexity which I wish to have handled by the file format itself. HDF5,EXI: do not seem to have .net implementations SQLite/SQL Server Compact edition: the data structure at hand would result in a pretty complex table structure that seems too heavyweight for the intended use BSON: does not appear to support requirement 3. Fast Infoset: only seems to have paid .NET implementations. Any recommendations or pointers are greatly appreciated. Furthermore if you believe any of the information above is not true, please provide pointers/examples to prove me wrong.

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  • Working with ieee format numbers in ARM

    - by Jake Sellers
    I'm trying to write an ARM program that will convert an ieee number to a TNS format number. TNS is a format used by some super computers, and is similar to ieee but different. I'm trying to use several masks to place the three different "part" of the ieee number in separate registers so I can move them around accordingly. Here is my unpack subroutine: UnpackIEEE LDR r1, SMASK ;load the sign bit mask into r1 LDR r2, EMASK ;load the exponent mask into r2 LDR r3, GMASK ;load the significand mask into r3 AND r4, r0, r1 ;apply sign mask to IEEE and save into r4 AND r5, r0, r2 ;apply exponent mask to IEEE and save into r5 AND r6, r0, r3 ;apply significand mask to IEEE and save into r6 MOV pc, r14 ;return And here are the masks and number declarations so you can understand: IEEE DCD 0x40300000 ;2.75 decimal or 01000000001100000000000000000000 binary SMASK DCD 0x80000000 ;Sign bit mask EMASK DCD 0x7F800000 ;Exponent mask GMASK DCD 0x007FFFFF ;Significand mask When I step through with the debugger, the results I get are not what I expect after working through it on paper. EDIT: What I mean, is that after the subroutine runs, registers 4, 5, and 6 all remain 0. I can't figure out why the masks are not working. I think I do not fully understand how the number is being stored in the register or using the masks wrong. Any help appreciated. If you need more info just ask. EDIT: entry point: Very simple, just trying to get these subroutines working. ENTRY LDR r1, IEEE ;load IEEE num into r1 BL UnpackIEEE ;call unpack sub SWI SWI_Exit ;finish

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  • How to display locale sensitive time format without seconds in python

    - by Tim Kersten
    I can output a locale sensitive time format using strftime('%X'), but this always includes seconds. How might I display this time format without seconds? >>> import locale >>> import datetime >>> locale.setlocale(locale.LC_ALL, 'en_IE.utf-8') 'en_IE.utf-8' >>> print datetime.datetime.now().strftime('%X') 12:22:43 >>> locale.setlocale(locale.LC_ALL, 'zh_TW.utf-8') 'zh_TW.utf-8' >>> print datetime.datetime.now().strftime('%X') 12?22?58? The only way I can think of doing this is attempting to parse the output of locale.nl_langinfo(locale.T_FMT) and strip out the seconds bit, but that brings it's own trickery. >>> print locale.nl_langinfo(locale.T_FMT) %H?%M?%S? >>> locale.setlocale(locale.LC_ALL, 'en_IE.utf-8') 'en_IE.utf-8' >>> print locale.nl_langinfo(locale.T_FMT) %T

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  • jQuery image crossfader problem

    - by Dr Casper Black
    Hey!, I have a image switcher fadein/out (it will crossfade iamges - auto(1 - x) ) and a pager but i cant manage to make the image rotation listen the click action on pager, when clicked on pager the image will NOT jup tu the specific img. The problem is in the rotate function the triggerID will hold the "rel" num of the current pager-element which is the equivalent to the image "list" num, so when clicked on the pager, the triggerID will show the rel number that was clicked... can i use that to display the image Here is the code for JQ: $(".paging a:first").addClass("active"); //Rotation rotate = function(){ var triggerID = $active.attr("rel"); //Get number of times to images $(".paging a").removeClass('active'); //Remove all active class $active.addClass('active'); //Add active class (the $active is declared in the rotateSwitch function) //CrossFade Animation var $activeImg = $('.image_reel img.active'); if ( $activeImg.length == 0 ) $activeImg = $('.image_reel img:last'); var $next = $activeImg.next().length ? $activeImg.next() : $('.image_reel img:first'); $activeImg.addClass('last-active'); $next.css({opacity: 0.0}) .addClass('active') .animate({opacity: 1.0}, 500, function() { $activeImg.removeClass('active last-active'); }); }; //Rotation and Timing Event rotateSwitch = function(){ play = setInterval(function(){ //Set timer - this will repeat itself every 3 seconds $active = $('.paging a.active').next(); //Move to the next paging if ( $active.length === 0) { //If paging reaches the end... $active = $('.paging a:first'); //go back to first } rotate(); //Trigger the paging and slider function }, 3000); //Timer speed in milliseconds (3 seconds) }; rotateSwitch(); //Run function on launch //On Click $(".paging a").click(function() { $active = $(this); //Activate the clicked paging //Reset Timer clearInterval(play); //Stop the rotation rotate(); //Trigger rotation immediately rotateSwitch(); // Resume rotation timer return false; //Prevent browser jump to link anchor }); The HTML code: <div class="image_reel"> <img src="images/slideshow/img1.jpg" alt="image 1" class="active"> <img src="images/slideshow/img2.jpg" alt="image 2"> <img src="images/slideshow/img3.jpg" alt="image 3"> <img src="images/slideshow/img4.jpg" alt="image 4"> </div> <div class="paging"> <a href="#" rel="1" title="image 1">&nbsp;</a> <a href="#" rel="2" title="image 2">&nbsp;</a> <a href="#" rel="3" title="image 3">&nbsp;</a> <a href="#" rel="4" title="image 4">&nbsp;</a> </div> plz help.

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  • iPhone: How to Maintain Original Image Size Thoughout Image Edits

    - by maddy
    hi, I am developing an iPhone app that resizes and merges images. I want to select two photos of size 1600x1200 from photo library and then merge both into a single image and save that new image back to the photo library. However, I can't get the right size for the merged image. I take two image views of frame 320x480 and set the view's image to my imported images. After manipulating the images (zooming, cropping, rotating), I then save the image to album. When I check the image size it shows 600x800. How do I get the original size of 1600*1200? I've been stuck on this problem from two weeks! Thanks in advance.

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  • PHP Image resize - Why is the image uploaded but not resized?

    - by Hans
    BACKGROUND I have a script to upload an image. One to keep the original image and one to resize the image. 1. If the image dimensions (width & height) are within max dimensions I use a simple "copy" direct to folder UserPics. 2. If the original dimensions are bigger than max dimensions I want to resize the width and height to be within max. Both of them are uploading the image to the folder, but in case 2, the image will not be resized. QUESTION Is there something wrong with the script? Is there something wrong with the settings? SETTINGS Server: WAMP 2.0 PHP: 5.3.0 PHP.ini: GD2 enabled, Memory=128M (have tried 1000M) Tried imagetypes uploaded: jpg, jpeg, gif, and png (same result for all of them) SCRIPT //Uploaded image $filename = stripslashes($_FILES['file']['name']); //Read filetype $i = strrpos($filename,"."); if (!$i) { return ""; } $l = strlen($filename) - $i; $extension = substr($filename,$i+1,$l); $extension = strtolower($extension); //New picture name = maxid+1 (from database) $query = mysql_query("SELECT MAX(PicId) AS number FROM userpictures"); $row = mysql_fetch_array($query); $imagenumber = $row['number']+1; //New name of image (including path) $image_name=$imagenumber.'.'.$extension; $newname = "UserPics/".$image_name; //Check width and height of uploaded image list($width,$height)=getimagesize($uploadedfile); //Check memory to hold this image (added only as checkup) $imageInfo = getimagesize($uploadedfile); $requiredMemoryMB = ( $imageInfo[0] * $imageInfo[1] * ($imageInfo['bits'] / 8) * $imageInfo['channels'] * 2.5 ) / 1024; echo $requiredMemoryMB."<br>"; //Max dimensions that can be uploaded $maxwidth = 20; $maxheight = 20; // Check if dimensions shall be original if ($width > $maxwidth || $height > $maxheight) { //Make jpeg from uploaded image if ($extension=="jpg" || $extension=="jpeg" || $extension=="pjpeg" ) { $modifiedimage = imagecreatefromjpeg($uploadedfile); } elseif ($extension=="png") { $modifiedimage = imagecreatefrompng($uploadedfile); } elseif ($extension=="gif") { $modifiedimage = imagecreatefromgif($uploadedfile); } //Change dimensions if ($width > $height) { $newwidth = $maxwidth; $newheight = ($height/$width)*$newwidth; } else { $newheight = $maxheight; $newwidth = ($width/$height)*$newheight; } //Create new image with new dimensions $newdim = imagecreatetruecolor($newwidth,$newheight); imagecopyresized($newdim,$modifiedimage,0,0,0,0,$newwidth,$newheight,$width,$height); imagejpeg($modifiedimage,$newname,60); // Remove temp images imagedestroy($modifiedimage); imagedestroy($newdim); } else { // Just add picture to folder without resize (if org dim < max dim) $newwidth = $width; $newheight = $height; $copied = copy($_FILES['file']['tmp_name'], $newname); } //Add image information to the MySQL database mysql_query("SET character_set_connection=utf8", $dbh); mysql_query("INSERT INTO userpictures (PicId, Picext, UserId, Width, Height, Size) VALUES('$imagenumber', '$extension', '$_SESSION[userid]', '$newwidth', '$newheight', $size)")

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  • How to get image from relative URL in C#, the image cannot be in the project

    - by red-X
    I have a project where I'm loading relative image Uri's from an xml file. I'm loading the image like this: if (child.Name == "photo" && child.Attributes["href"] != null && File.Exists(child.Attributes["href"].Value)) { Image image = new Image(); image.Source = new BitmapImage(new Uri(child.Attributes["href"].Value, UriKind.RelativeOrAbsolute)); images.Add(image); } Where the "child" object is an XmlNode which could looks like this <photo name="info" href="Resources\Content\test.png"/> During debug it seemd images is filled with actual images but when I want to see them in any way it shows nothing. Weird thing is when I include the images in my project it does work, I however dont want to do that since my point for using an xml file is so that it would be lost since you'd have to rebuild the program anyway after a change.

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  • Convert C# format to VB

    - by Bill
    I am sure this is a simple questiion for you guys but I don't know what this developer is doing. name = String.Format(MyStringBuilder + ""); If I convert this to VB I get the message "operator + is not defined for types system.text.stringbuilder and string". Same thing if I use &. Thanks for any assistance. Bill

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  • How do you position a background image inside a <div>?

    - by Giffyguy
    My code currently looks like this: <div style="position: fixed; width: 35.25%; height: 6.75%; left: 0%; top: 4.625%; right: 64.75%; bottom: 88.625%; color: #D1E231; text-align: center; background-color: #666666; background-image: url('FleurTR.png'); background-position: right top;"> <div> The <div> shows up just fine, with the grey background color, but the background image won't show up at all. What am I missing here? There's no reason I should have to specify background-attachment or background-repeat, right? (I don't want it to repeat.)

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  • custom format specifications in python

    - by anupam
    hi, in python, how can a custom format-specification be added, to a class ? for example, if i write a matrix class, i would like to define a '%M' (or some such) which would then dump the entire contents of the matrix... thank you kind regards anupam

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  • data format encoding and etc

    - by hguser
    Hi: I Suddenly found that I have no idea about the concept of data format and the encoding. For exmpale, what is the differences about the ascii/binary/base64/text-xml ? For a real case, I am working with a web service whose parameter I have to define,however one of the parameter should be ascii,another is binary and the last is netcdf. So,how to define it? ALso I wonder the ascii needed parameter can be a .txt or .dat ?

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  • php resize image

    - by haohan
    I have a class to read and output the image content, if $width is set, it will resize the image, and then output it. If I call the function like this $image-readImage('123.jpg'); , it can output the image file correctly, but when I call $image-readImage('123.jpg'); , it just display a black image with resized width & height. And I tried to replace the code from @imagejpeg($thumb, null, 100); to @imagejpeg($image, null, 100); will works~ - protected function readImage($fileName, $width = 0) { if ($width <= 0) { return @file_get_contents($this-destination . '/' . $fileName); } else { $imageSize = @getimagesize($this-destination . '/' . $fileName); $actualWidth = $imageSize[0]; $actualHeigth = $imageSize[1]; if ($actualWidth <= $width) { return @file_get_contents($this-destination . '/' . $fileName); } $height = (100 / ($actualWidth / $width)) * .01; $height = @round($actualHeigth * $height); $image = @imagecreatefromjpeg($this-destination . '/' . $fileName); $thumb = @imagecreatetruecolor($width, $height); @imagecopyresampled($thumb, $image, 0, 0, 0, 0, $width, $height, $actualWidth, $actualHeight); ob_start(); @imagejpeg($thumb, null, 100); $bits = ob_get_contents(); ob_end_clean(); return $bits; } } Any experts know what happened and help me to solve it ? Thanks.

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  • Excel document incorrect format

    - by Jim
    I have a macro enabled work book and i change the name of the .xlsm file to [FileName].xlsm.zip and then i unzip i get some folders I then put these extracted folders in to another folder and zip it back and rechange the extension to the previous xlsm format i now try and open but i get an unreadable error. I am not changing any content here just extracting and zip it back. What could be the problem?

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  • Designing a database file format

    - by RoliSoft
    I would like to design my own database engine for educational purposes, for the time being. Designing a binary file format is not hard nor the question, I've done it in the past, but while designing a database file format, I have come across a very important question: How to handle the deletion of an item? So far, I've thought of the following two options: Each item will have a "deleted" bit which is set to 1 upon deletion. Pro: relatively fast. Con: potentially sensitive data will remain in the file. 0x00 out the whole item upon deletion. Pro: potentially sensitive data will be removed from the file. Con: relatively slow. Recreating the whole database. Pro: no empty blocks which makes the follow-up question void. Con: it's a really good idea to overwrite the whole 4 GB database file because a user corrected a typo. I will sell this method to Twitter ASAP! Now let's say you already have a few empty blocks in your database (deleted items). The follow-up question is how to handle the insertion of a new item? Append the item to the end of the file. Pro: fastest possible. Con: file will get huge because of all the empty blocks that remain because deleted items aren't actually deleted. Search for an empty block exactly the size of the one you're inserting. Pro: may get rid of some blocks. Con: you may end up scanning the whole file at each insert only to find out it's very unlikely to come across a perfectly fitting empty block. Find the first empty block which is equal or larger than the item you're inserting. Pro: you probably won't end up scanning the whole file, as you will find an empty block somewhere mid-way; this will keep the file size relatively low. Con: there will still be lots of leftover 0x00 bytes at the end of items which were inserted into bigger empty blocks than they are. Rigth now, I think the first deletion method and the last insertion method are probably the "best" mix, but they would still have their own small issues. Alternatively, the first insertion method and scheduled full database recreation. (Probably not a good idea when working with really large databases. Also, each small update in that method will clone the whole item to the end of the file, thus accelerating file growth at a potentially insane rate.) Unless there is a way of deleting/inserting blocks from/to the middle of the file in a file-system approved way, what's the best way to do this? More importantly, how do databases currently used in production usually handle this?

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  • What is the best algorithm to locate a point in an image file?

    - by suugaku
    Hi all, I want to create a mark sheet recognizer. Here is the description: My system uses black and white color scheme. The mark sheet paper has a small black rectangle on each corner and an additional small black rectangle, to determine orientation, near one of the previous rectangles. The paper is scanned to yield an image (in bmp format for example). The first step is to locate these five references in image as eficient as possible. My rough idea is to trace row by row and from left to right for each row. It sounds very slow I think. Is there any better way to do that? Thank you in advance. regards, Suugaku

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  • jQuery click event on image only fires once

    - by stephenreece@
    I created a view of thumbnails. When the user clicks, I want the real image to pop-up in a dialog. That works the first time, but once the jQuery 'click' fires on an thumbnail it never fires again unless I reload the entire page. I've tried rebinding the click events on the dialog close that that does not help. Here is my code: function LoadGalleryView() { $('img.gallery').each(function(){ BindImage($(this)); }); } function BindImage(image) { var src= image.attr('src'); var id= image.attr('id'); var popurl = src.replace("thumbs/", ""); image.hover(function(){ image.attr('style', 'height: 100%; width: 100%;'); }, function(){ image.removeAttr('style'); }); $('#'+id).live('click', function() { PopUpImage(popurl); }); } function CheckImage(img,html) { if ( img.complete ) { $('#galleryProgress').html(''); var imgwidth = img.width+35; var imgheight = img.height+65; $('<div id="viewImage" title="View"></div>').html(html).dialog( { bgiframe: true, autoOpen: true, modal: true, width: imgwidth, height: imgheight, position: 'center', closeOnEscape: true }); } else { $('#galleryProgress').html('<img src="images/ajax-loader.gif" /><br /><br />'); setTimeout(function(){CheckImage(img,html);},10); } } function PopUpImage(url) { var html = '<img src="'+url+'" />'; var img = new Image(); img.src = url; if ( ! img.complete ) { setTimeout(function(){CheckImage(img,html);},10); } } PopUpImage() only executes the first time an image is clicked and I cannot figure out how to rebind.

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  • Jquery resizing image

    - by michele
    I'd like to start a discussion about the image resizing using jQuery. That's my contribution: But I think I'm far away from the solution. What about the cropping? Who can help me? $(document).ready(function() { $('.story-small img').each(function() { var maxWidth = 100; // Max width for the image var maxHeight = 100; // Max height for the image var ratio = 0; // Used for aspect ratio var width = $(this).width(); // Current image width var height = $(this).height(); // Current image height // Check if the current width is larger than the max if(width > maxWidth){ ratio = maxWidth / width; // get ratio for scaling image $(this).css("width", maxWidth); // Set new width $(this).css("height", height * ratio); // Scale height based on ratio height = height * ratio; // Reset height to match scaled image } // Check if current height is larger than max if(height > maxHeight){ ratio = maxHeight / height; // get ratio for scaling image $(this).css("height", maxHeight); // Set new height $(this).css("width", width * ratio); // Scale width based on ratio width = width * ratio; // Reset width to match scaled image } }); });

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  • How to fix Java Image Fetcher error ?

    - by Frank
    My code looks like this : private static JFileChooser fc; if (fc==null) { fc=new JFileChooser(Image_Dir); fc.addChoosableFileFilter(new Image_Filter()); // Add a custom file filter and disable the default (Accept All) file filter. fc.setAcceptAllFileFilterUsed(false); fc.setAccessory(new Image_Preview(fc)); // Add the preview pane. } int returnVal=fc.showDialog(JFileChooser_For_Image.this,"Get Image"); // Show it. After I select an image from the panel, I got the following error message : Exception in thread "Image Fetcher 0" java.lang.UnsatisfiedLinkError: Native Library C:\Program Files (x86)\Java\jre6\bin\jpeg.dll already loaded in another classloader at java.lang.ClassLoader.loadLibrary0(Unknown Source) at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.loadLibrary0(Unknown Source) at java.lang.System.loadLibrary(Unknown Source) at sun.security.action.LoadLibraryAction.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.awt.image.JPEGImageDecoder.<clinit>(Unknown Source) at sun.awt.image.InputStreamImageSource.getDecoder(Unknown Source) at sun.awt.image.FileImageSource.getDecoder(Unknown Source) at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source) at sun.awt.image.ImageFetcher.fetchloop(Unknown Source) at sun.awt.image.ImageFetcher.run(Unknown Source) When I run it from an executable Jar file, it works fine, but after I wrapped it into an exe file, I got the above error, why ? How to fix it ?

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