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  • jquery png fix on hidden div and jquerybrowser question

    - by Jared
    Hello, I have some code that if Javascript is available, it will remove a GIF image and replace it with a PNG image. The PNG is display:none and the GIF is visible. Since IE6- browsers can't load PNG, I have loaded the jquery PNG fix. But it only seems to work if the image is already visible. The other issue is I am trying to get the jquery.browser function to apply to less than version 6, and I am not having much luck. <script type="text/javascript"> $(document).ready(function(){ $("#gif").hide(); jQuery.each(jQuery.browser, function(i, val) { if($.browser.msie && jQuery.browser.version <="6"){ $("#png").show(); $('.png').pngFix() }else{ $("#png").fadeIn("slow"); } }); }); </script> HTML <img class="png" id="png" src="images/main_elements/one-2-flush-it-campus-challenge.png" style="display:none;" /> <img id="gif" src="images/main_elements/one-2-flush-it-campus-challenge.gif"/>

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  • Photoshop How to save selection to PNG

    - by Aniti
    I have a largish PSD file with a couple of hundred layers, that I would like to extract selected areas from into PNG files. Areas can consist of a couple of layers. Being new to Photoshop, I have been using the following workaround. Duplicate needed layers into a new scratch PSD file of same size, TRIM to transparency, Save As PNG, undo TRIM, hide layers, rinse and repeat... I suppose I could do it without the scratch file and just crop selection, Save As PNG and undo, but there must be a nicer method. What other ways are there to accomplish this export of a selected area to PNG? EDIT: This is on Windows Xp running Photoshop CS3 Extended

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  • Source of (programmer) inefficiency

    - by Daniel
    I am interested to gain a better insight about the possible reasons of personal inefficiency as programmers (and only in programming) due to – simply - our own errors (because we are humans – well, almost all of us). I am not interested in how much we are productive or in how many adjustements the customer asks for when the work is done, but where and how each of us spend that part of its time in tasks that are unproductive and there is no one to blame except ourselves. Excluding ego - feeding and / or self – gratification, what I am trying to get (for all of us) is: what are the common issues eating our time; insight on reasons for that issues; identify simple way for us, personally (not delegating actions to other or our organizations), to correct our own problems. Please, do not think in academic terms but aim at the opportunity to compare our daily experiences and understand what are and how we try to fix our personal deficiencies. If you are interested to respond to this post, please: integrate the list if you see something important (or obvious) missing; highlight or name honestly your first issue tellng the way you try to address and solve your issue acting on yourself and yourself only in a sort of "continuous quality improving" My criteria for accepting the answer is: choose the best solution (feasibility and utility) to fix one (or more) of the problems of the list. Of course, selecting an error is not a vote on our skills: maybe we are hyper professional programmers and we lose ten minutes only every year or we are terribly inefficient, losing a couple of days a week: reasons for inefficiency could be really the same - but in a different scale. A possible list: Plain error in the names (variables, functions). Inability to see the obvious in your code. Misreading. Lack of concentration. Trying to use a technology you have not mastered. Errors with data types. Time required to understand your previous code or your documentation. Trying to do something more than requested because you enjoy it Using solutions more complicated than required because you enjoy it. Plain logical errors. Errors due to your fault in communications. Distraction My first personal issue: "Trying to use a technology you do not master." I have to use daily several technologies and I often need to spend significant time correcting code because my assumptions were plainly wrong. Reasons for this: production needs put high pressure and make difficult to find the time to learn. I try to address this reading technical books - as many as I can - even if this actually consumes a lot of time.

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  • The road to become a programmer [closed]

    - by user68991
    I'm looking for a 'career' change, I don't actually have a career at the moment since I haven't been able to find a job since I graduated with a degree in Materials Engineering. One of my loves has always been computers and programming, though I have never studied it seriously. When I was 11 I wrote a very basic graphical 'game' using notepad and HTML, where I drew each possible position of the main character on the different 'maze' level in MSPaint, using pictures of arrows as links to a new page with the character in a new position, and various other buttons would pop up 'search box', 'press button' etc. At the time I thought this was an amazing achievement of my programming skills. I've used a little bit of FORTRAN 90 whilst I was at university, which rekindled my interest in programming. When I was a kid I mainly used C and HTML, but only very basically as my 'game' suggests. I want to learn a new programming language, I'm not entirely sure where I want to go with it, but the number one contender at the moment is android apps. I'm looking at learning Java, but I've read that it's a difficult place to begin with; so I've also looked at learning Visual Basic, which I believe is also object oriented(?) but a little easier to understand? (not that I know what an object is anyway). Any information people could give me regarding which language to learn, and if there are any good online tutorial for that language I'd really appreciate it. Some of the tutorials I've used so far are full or jargon I can't understand. Also, I'm not afraid of maths having got an engineering degree. Thanks in advance for any help/advice. James

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  • How can I locate the frames of a spritesheet PNG based on this PLIST data?

    - by kitsune
    Someone asked me to reskin a certain game. Now he only sent me the whole sprite PNG and PLIST files of the sprites. He instructed me to rename each sprite with the same name corresponding to each original sprite. The problem is, he gave me the whole sprite sheet instead of each individual sprite and the PLIST. Now yes, I can read the PNG filenames from the PLIST, but I cannot rename the reskin sprites I did because I'm not sure which sprite is boy_gun_3_3.png; there are multiple guns, I don't know which is which. Is there a way to extract individual accurately named individual PNG files from the single sprite sheet using the PLIST?

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  • Convert png sequence to x264 with ffmpeg

    - by Thucydides411
    I am trying to convert a series of pngs into an mp4 video. I am using ffmpeg, and want to encode the video with the x264 codec. Using the command ffmpeg -y -r 30 -b 1800k -i _tmp%04d.png -vcodec libx264 out.mp4 I get the following warning message Incompatible pixel format 'bgra' for codec 'libx264', auto-selecting format 'yuv420p' My understanding is that there is an alpha channel in the pngs, which the x264 encoder cannot handle. Is there a way to get around this problem? Is there, for example, a way to get the encoder to ignore the alpha channel (my pngs don't actually have any transparent elements)? I'm aware that I could batch convert the pngs beforehand to strip the alpha channel, but the sequence of images is produced by another program, and having to preprocess the images each time I make a video would be less than optimal. Edit: After stripping the alpha channel from each frame using the command convert in.png -background white -flatten +matte out.png ffmpeg gives the warning message Incompatible pixel format 'pal8' for codec 'libx264', auto-selecting format 'yuv420p' so still no dice.

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  • Decompress PNG using zlib

    - by darkie15
    Hi All, How can I use zlib library to decompress a PNG file? I have no idea how to read a PNG file. When I opened a PNG file in TextPad(a text editor), the data was not at all understandable. Is it because a PNG file is compressed? Any help is greatly appreciated. I need to read a PNG file using a C program and gcc compiler. Regards, darkie

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  • CRC for PNG file format

    - by darkie15
    Hi All, I need to read a PNG file and interpret all the information stored in it and print it in human readable format. While working on PNG, i understood that it uses CRC-32 for generating checksum for each chunk. But I could not understand the following information mentioned on the PNG file specification site: The polynomial used by PNG is: x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x + 1 Here is the link for reference: http://www.w3.org/TR/PNG/ Can anyone please help me in understanding this? Regards, darkie

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  • How to convert pdf to png ?

    - by lisyqiao
    ( www.pdftopng.net )*PDF to PNG*Converter is the professional software that can convert PDF to PNG with high quality and fast speed. Besides, Free PDF to PNG can convert PNG to the other images like PDF to JPG, PDF to GIF, PDF to TIFF, PDF to BMP and so on. What's more, PDF to PNG can customize your output settings including output type, output color and page range etc.

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  • Automating the choice between JPEG and PNG with a script

    - by MHC
    Choosing the right format to save your images in is crucial for preserving image quality and reducing artifacts. Different formats follow different compression methods and come with their own set of advantages and disadvantages. JPG, for instance is suited for real life photographs that are rich in color gradients. The lossless PNG, on the other hand, is far superior when it comes to schematic figures: Picking the right format can be a chore when working with a large number of files. That's why I would love to find a way to automate it. A little bit of background on my particular use case: I am working on a number of handouts for a series of lectures at my unversity. The handouts are rich in figures, which I have to extract from PDF-formatted slides. Extracting these images gives me lossless PNGs, which are needlessly large at times. Converting these particular files to JPEG can reduce their size to up to less than 20% of their original file size, while maintaining the same quality. This is important as working with hundreds of large images in word processors is pretty crash-prone. Batch converting all extracted PNGs to JPEGs is not an option I am willing to follow, as many if not most images are better suited to be formatted as PNGs. Converting these would result in insignificant size reductions and sometimes even increases in filesize - that's at least what my test runs showed. What we can take from this is that file size after compression can serve as an indicator on what format is suited best for a particular image. It's not a particularly accurate predictor, but works well enough. So why not use it in form of a script: I included inotifywait because I would prefer for the script be executed automatically as soon as I drag an extracted image into a folder. This is a simpler version of the script that I've been using for the last couple of weeks: #!/bin/bash inotifywait -m --format "%w%f" --exclude '.jpg' -r -e create -e moved_to --fromfile '/home/MHC/.scripts/Workflow/Conversion/include_inotifywait' | while read file; do mogrify -format jpg -quality 92 "$file" done The advanced version of the script would have to be able to handle spaces in file names and directory names preserve the original file names flatten PNG images if an alpha value is set compare the file size between the temporary converted image and its original determine if the difference is greater than a given precentage act accordingly The actual conversion could be done with imagemagick tools: convert -quality 92 -flatten -background white file.png file.jpg Unfortunately, my bash skills aren't even close to advanced enough to convert the scheme above into an actual script, but I am sure many of you can. My reputation points on here are pretty low, but I will gladly award the most helpful answer with the highest bounty I can set. References: http://www.formortals.com/introducing-cnb-imageguide/, http://www.turnkeylinux.org/blog/png-vs-jpg Edit: Also see my comments below for some more information on why I think this script would be the best solution to the problem I am facing.

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  • Convert video to apng/png?

    - by acidzombie24
    I tried to do this with ffmpeg but failed (i also failled making animated gifs). Is there a simple to use free program (command line is ok) to convert videos to animated pngs? As long as it doesnt dump the video frame by frame into png files and create a monster size png then i should like it.(I didnt see an option to make ffmpeg not dump every frame) From the wiki http://en.wikipedia.org/wiki/APNG

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  • Fastest PNG decoder for .NET

    - by sboisse
    Our web server needs to process many compositions of large images together before sending the results to web clients. This process is performance critical because the server can receive several thousands of requests per hour. Right now our solution loads PNG files (around 1MB each) from the HD and sends them to the video card so the composition is done on the GPU. We first tried loading our images using the PNG decoder exposed by the XNA API. We saw the performance was not too good. To understand if the problem was loading from the HD or the decoding of the PNG, we modified that by loading the file in a memory stream, and then sending that memory stream to the .NET PNG decoder. The difference of performance using XNA or using System.Windows.Media.Imaging.PngBitmapDecoder class is not significant. We roughly get the same levels of performance. Our benchmarks show the following performance results: Load images from disk: 37.76ms 1% Decode PNGs: 2816.97ms 77% Load images on Video Hardware: 196.67ms 5% Composition: 87.80ms 2% Get composition result from Video Hardware: 166.21ms 5% Encode to PNG: 318.13ms 9% Store to disk: 3.96ms 0% Clean up: 53.00ms 1% Total: 3680.50ms 100% From these results we see that the slowest parts are when decoding the PNG. So we are wondering if there wouldn't be a PNG decoder we could use that would allow us to reduce the PNG decoding time. We also considered keeping the images uncompressed on the hard disk, but then each image would be 10MB in size instead of 1MB and since there are several tens of thousands of these images stored on the hard disk, it is not possible to store them all without compression.

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  • convert a pdf/djvu file to png's under Linux how? [closed]

    - by user66732
    Imagemagick doesn't work (Fedora 14) on one PDF file: $ convert -density 300 INPUT.PDF out.png Error: /ioerror in --showpage-- Operand stack: 1 true Execution stack: %interp_exit .runexec2 --nostringval-- --nostringval-- --nostringval-- 2 %stopped_push --nostringval-- --nostringval-- --nostringval-- false 1 %stopped_push 1878 1 3 %oparray_pop 1877 1 3 %oparray_pop 1861 1 3 %oparray_pop --nostringval-- --nostringval-- 141 1 319 --nostringval-- %for_pos_int_continue --nostringval-- --nostringval-- 1761 0 9 %oparray_pop --nostringval-- --nostringval-- Dictionary stack: --dict:1157/1684(ro)(G)-- --dict:1/20(G)-- --dict:75/200(L)-- --dict:75/200(L)-- --dict:108/127(ro)(G)-- --dict:288/300(ro)(G)-- --dict:22/25(L)-- --dict:6/8(L)-- --dict:22/40(L)-- Current allocation mode is local Last OS error: 27 GPL Ghostscript 8.71: Unrecoverable error, exit code 1 convert: Postscript delegate failed INPUT.PDF': @ error/pdf.c/ReadPDFImage/645.<br> convert: missing an image filenameout.png' @ error/convert.c/ConvertImageCommand/2953. $ And it doesn't work on a djvu file: $ convert -density 300 INPUT.DJVU out.png convert: no decode delegate for this image format INPUT.DJVU' @ error/constitute.c/ReadImage/532.<br> convert: missing an image filenameout.png' @ error/convert.c/ConvertImageCommand/2953. $ an extra: the output filenames. out-0.png out-1.png ... out-9.png out-10.png out-11.png .. out-123.png out-124.png is there a way to be like this?: out-000.png out-001.png ... out-009.png out-010.png out-011.png .. out-123.png out-124.png because they would be in wrong order: out-0.png out-1.png out-10.png out-11.png out-123.png out-124.png out-9.png thank you :\

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  • convert a pdf/djvu file to png's under Linux how?

    - by user62367
    Imagemagick doesn't work (Fedora 14) on one PDF file: $ convert -density 300 INPUT.PDF out.png Error: /ioerror in --showpage-- Operand stack: 1 true Execution stack: %interp_exit .runexec2 --nostringval-- --nostringval-- --nostringval-- 2 %stopped_push --nostringval-- --nostringval-- --nostringval-- false 1 %stopped_push 1878 1 3 %oparray_pop 1877 1 3 %oparray_pop 1861 1 3 %oparray_pop --nostringval-- --nostringval-- 141 1 319 --nostringval-- %for_pos_int_continue --nostringval-- --nostringval-- 1761 0 9 %oparray_pop --nostringval-- --nostringval-- Dictionary stack: --dict:1157/1684(ro)(G)-- --dict:1/20(G)-- --dict:75/200(L)-- --dict:75/200(L)-- --dict:108/127(ro)(G)-- --dict:288/300(ro)(G)-- --dict:22/25(L)-- --dict:6/8(L)-- --dict:22/40(L)-- Current allocation mode is local Last OS error: 27 GPL Ghostscript 8.71: Unrecoverable error, exit code 1 convert: Postscript delegate failed INPUT.PDF': @ error/pdf.c/ReadPDFImage/645.<br> convert: missing an image filenameout.png' @ error/convert.c/ConvertImageCommand/2953. $ And it doesn't work on a djvu file: $ convert -density 300 INPUT.DJVU out.png convert: no decode delegate for this image format INPUT.DJVU' @ error/constitute.c/ReadImage/532.<br> convert: missing an image filenameout.png' @ error/convert.c/ConvertImageCommand/2953. $ an extra: the output filenames. out-0.png out-1.png ... out-9.png out-10.png out-11.png .. out-123.png out-124.png is there a way to be like this?: out-000.png out-001.png ... out-009.png out-010.png out-011.png .. out-123.png out-124.png because they would be in wrong order: out-0.png out-1.png out-10.png out-11.png out-123.png out-124.png out-9.png thank you :\

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  • convert a pdf/djvu file to png's under Linux how?

    - by user62367
    Imagemagick doesn't work (Fedora 14) on one PDF file: $ convert -density 300 INPUT.PDF out.png Error: /ioerror in --showpage-- Operand stack: 1 true Execution stack: %interp_exit .runexec2 --nostringval-- --nostringval-- --nostringval-- 2 %stopped_push --nostringval-- --nostringval-- --nostringval-- false 1 %stopped_push 1878 1 3 %oparray_pop 1877 1 3 %oparray_pop 1861 1 3 %oparray_pop --nostringval-- --nostringval-- 141 1 319 --nostringval-- %for_pos_int_continue --nostringval-- --nostringval-- 1761 0 9 %oparray_pop --nostringval-- --nostringval-- Dictionary stack: --dict:1157/1684(ro)(G)-- --dict:1/20(G)-- --dict:75/200(L)-- --dict:75/200(L)-- --dict:108/127(ro)(G)-- --dict:288/300(ro)(G)-- --dict:22/25(L)-- --dict:6/8(L)-- --dict:22/40(L)-- Current allocation mode is local Last OS error: 27 GPL Ghostscript 8.71: Unrecoverable error, exit code 1 convert: Postscript delegate failed INPUT.PDF': @ error/pdf.c/ReadPDFImage/645.<br> convert: missing an image filenameout.png' @ error/convert.c/ConvertImageCommand/2953. $ And it doesn't work on a djvu file: $ convert -density 300 INPUT.DJVU out.png convert: no decode delegate for this image format INPUT.DJVU' @ error/constitute.c/ReadImage/532.<br> convert: missing an image filenameout.png' @ error/convert.c/ConvertImageCommand/2953. $ an extra: the output filenames. out-0.png out-1.png ... out-9.png out-10.png out-11.png .. out-123.png out-124.png is there a way to be like this?: out-000.png out-001.png ... out-009.png out-010.png out-011.png .. out-123.png out-124.png because they would be in wrong order: out-0.png out-1.png out-10.png out-11.png out-123.png out-124.png out-9.png thank you :\

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  • When do you call yourself a programmer

    - by benhowdle89
    "A programmer, computer programmer or coder is someone who writes computer software" from Wikipedia If you do frontend development using jQuery/CSS/HTML do you call yourself a programmer? If you develop PHP applications that deal with databases, do you call yourself a programmer? Are you only a programmer if you write applications for desktops and mobiles? Is the web a place where the line between developer and programmer stops?

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  • Images in the project NOT adding to array - don't know why.

    - by Sam Jarman
    Hi there, I have to sets of images. Each set has 16 images. One set is called 0.png through to 15.png the other is a0.png through to a15.png. In my app, it loads each one dependent on a variable (which by logging, I have proved it works) here is the code [MemoryManager sharedMemoryManager]; NSLog(@"THEME: %@", [MemoryManager sharedMemoryManager].themeName); imageArray = [[NSMutableArray alloc] init]; if([MemoryManager sharedMemoryManager].themeName == @"hand"){ NSLog(@"Here 2"); [imageArray addObject:[UIImage imageNamed:@"0.png"]]; // [imageArray addObject:[UIImage imageNamed:@"1.png"]];//1 [imageArray addObject:[UIImage imageNamed:@"2.png"]];//2 [imageArray addObject:[UIImage imageNamed:@"3.png"]];//3 [imageArray addObject:[UIImage imageNamed:@"4.png"]];//4 [imageArray addObject:[UIImage imageNamed:@"5.png"]];//5 [imageArray addObject:[UIImage imageNamed:@"6.png"]];//6 [imageArray addObject:[UIImage imageNamed:@"7.png"]];//7 [imageArray addObject:[UIImage imageNamed:@"8.png"]];//8 [imageArray addObject:[UIImage imageNamed:@"9.png"]];//9 [imageArray addObject:[UIImage imageNamed:@"10.png"]];//10 [imageArray addObject:[UIImage imageNamed:@"11.png"]];//11 [imageArray addObject:[UIImage imageNamed:@"12.png"]];//12 [imageArray addObject:[UIImage imageNamed:@"13.png"]];//13 [imageArray addObject:[UIImage imageNamed:@"14.png"]];//14 [imageArray addObject:[UIImage imageNamed:@"15.png"]];//15 } if([MemoryManager sharedMemoryManager].themeName == @"letters"){ NSLog(@"Here 3"); //[imageArray removeAllObjects]; [imageArray addObject:[UIImage imageNamed:@"a0.png"]]; // [imageArray addObject:[UIImage imageNamed:@"a1.png"]];//1 [imageArray addObject:[UIImage imageNamed:@"a2.png"]];//2 [imageArray addObject:[UIImage imageNamed:@"a3.png"]];//3 [imageArray addObject:[UIImage imageNamed:@"a4.png"]];//4 [imageArray addObject:[UIImage imageNamed:@"a5.png"]];//5 [imageArray addObject:[UIImage imageNamed:@"a6.png"]];//6 [imageArray addObject:[UIImage imageNamed:@"a7.png"]];//7 [imageArray addObject:[UIImage imageNamed:@"a8.png"]];//8 [imageArray addObject:[UIImage imageNamed:@"a9.png"]];//9 [imageArray addObject:[UIImage imageNamed:@"a10.png"]];//10 [imageArray addObject:[UIImage imageNamed:@"a11.png"]];//11 [imageArray addObject:[UIImage imageNamed:@"a12.png"]];//12 [imageArray addObject:[UIImage imageNamed:@"a13.png"]];//13 [imageArray addObject:[UIImage imageNamed:@"a14.png"]];//14 [imageArray addObject:[UIImage imageNamed:@"a15.png"]];//15 NSLog(@"Here 4"); } The log says 2010-05-26 21:30:57.092 Memory[22155:207] Here 1 2010-05-26 21:30:57.093 Memory[22155:207] THEME: letters 2010-05-26 21:30:57.095 Memory[22155:207] Here 3 2010-05-26 21:30:57.109 Memory[22155:207] Here 4 The images are in the same folder the .xproj file is. They simply is just not working. Any ideas? Cheers

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  • Alternatives libraries for loading PNG images

    - by Robert
    My java J2SE application is reading a lot of (png) images from the web and some of them use features such as a transparency color for true-color images (tRNS section) that Sun's/Oracle's PNGImageReader implementation simply ignores. Therefore the common solution for loading via ImageIO.read(...); does not work for me as it relies on this incomplete PNGImageReader implementation. Does anybody know a png reader implementation that can read all forms of PNG images correctly - those with color table or true-color and alpha transparency or transparent color? As it is for a GPL project it should be a non-commercial one that can be included without licensing problems into the app. Edit: My be this question was too specific. Therefore let be redesign my question: Who knows alternative implementations and libraries that are able to load PNG files? I will then test the implementations for their capabilities to load some test png images. Edit2: The end result have to be a BufferedImage

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