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• Android image scaling to support multiple resolutions

  - by tyuo9980

  I've coded my game for 320x480 and I figure that the easiest way to support multiple resolutions is to scale the end image. What are your thoughts on this? Would it be cpu efficient to do it this way? I have all my images placed in the mdpi folder, I'll have it drawn unscaled on the screen onto a buffer, then scale it to fit the screen. all the user inputs will be scaled as well. I have these 2 questions: -How do you draw a bitmap without android automatically scaling it -How do you scale a bitmap?

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• In what circumstances can large pages produce a speedup ?

  - by timday

  Modern x86 CPUs have the ability to support larger page sizes than the legacy 4K (ie 2MB or 4MB), and there are OS facilities (Linux, Windows) to access this functionality. The Microsoft link above states large pages "increase the efficiency of the translation buffer, which can increase performance for frequently accessed memory". Which isn't very helpful in predicting whether large pages will improve any given situation. I'm interested in concrete, preferably quantified, examples of where moving some program logic (or a whole application) to use huge pages has resulted in some performance improvement. Anyone got any success stories ? There's one particular case I know of myself: using huge pages can dramatically reduce the time needed to fork a large process (presumably as the number of TLB records needing copying is reduced by a factor on the order of 1000). I'm interested in whether huge pages can also benefit more mundane applications though.

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• How do I view the location of an swf file that is obfuscated somehow.

  - by atticus

  Specifically, I'm trying to view Elmo's Keyboard-o-rama fullscreen. The original swf file has been moved and obscured. For a toddler, this game really needs to be full screen! The toddler doesn't mind too much and has already lost interest in the game for the day. But it's just driving me crazy. I've tried the usual method of viewing the page info in Firefox to no avail. And before people start trying to delete this for being game specific, I would like to know how to do this for any obfuscated swf location, not just games. Thanks in advance. If anybody knows how to find the appropriate information in tcpdump or wireshark, that could probably help, too. That's what I'm trying to do right now.

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• Running ubuntu 10.04 without a laptop's primary display

  - by riteshmnayak

  I have an IBM thinkpad(R50e) whose display is broken. I would still like to use the laptop by connecting it to an external monitor and keyboard/mouse. This is what I did: Removed the hard disk from the broken IBM Put the hard disk in the working IBM and installed 10.04 on it. It booted fine and I installed many packages and stuff. I put the hard disk back into the broken display IBM thinking I could use it by connecting it to an external monitor that I own. Well, it turns out that while booting, the display shows up but because the display shifts from the VGA display to the primary display mid-boot, the laptop does not boot. Is there a way in which I can force the laptop to not use its primary display while booting. I looked at Randr and also grub.conf settings but nothing seemed to work. Please help!

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• Write to pipe deadlocking program

  - by avs3323

  Hi, I am having a problem in my program that uses pipes. What I am doing is using pipes along with fork/exec to send data to another process What I have is something like this: //pipes are created up here if(fork() == 0) //child process { ... execlp(...); } else { ... fprintf(stderr, "Writing to pipe now\n"); write(pipe, buffer, BUFFER_SIZE); fprintf(stderr, "Wrote to pipe!"); ... } This works fine for most messages, but when the message is very large, the write into the pipe deadlocks. I think the pipe might be full, but I do not know how to clear it. I tried using fsync but that didn't work. Can anyone help me?

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• DIrect videos and slideshows fullscreen from another display

  - by neurino

  I have 3 displays: 1 control display I can see 2 40" Full HD displays I can't see my need is to play videos and presentations fullscreen on the two 40" screens while being able to control them from the control display. So far I am able to achieve this with a cumbersome set of keyboard shortcuts like: open VLC on control display send to left display with Win + Shift + Left go fullscreen with f and more combinations to restore, get VLC on control display etc. This is really error prone and not professional. Also I wish I have a media player and a slideshow player that can: send the same video / slideshow to the two 40" displays at the same time send two different videos / slideshows, one each 40" display having all controls on the central display, the only one I can see. Any advice welcome, thank you for your support.

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• better options for screen?

  - by lonestar21

  OK. So I love screen. It has saved my bacon a few times when machines crash or get disconnected from the network. However, there are enough reasons keep keep me from using screen for everything, which include: Pain in the butt scrolling. Why can't I just interact as though this is a normal bash shell? My keyboard shortcuts are gone. I have a number of things customized in my bash environment, is there a way to get them to work in screen as well? Are there any tools our tips that I can use to make my screen-using experience as high quality as my bash using experience?

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• How to run shell script with live feedback from PHP?

  - by Highway of Life

  How would I execute a shell script from PHP while giving constant/live feedback to the browser? I understand from the system function documentation: The system() call also tries to automatically flush the web server's output buffer after each line of output if PHP is running as a server module. I'm not clear on what they mean by running it as a 'server module'. I attempted to run the script in the cgi-bin, but either I'm doing it wrong, or that's not what they mean. Example PHP code: <?php system('/var/lib/script_test.sh'); Example shell code: #!/bin/bash echo "Start..." for i in {1..10} do echo "$i..." sleep 1 done echo "Done."

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• check whether fgets would block

  - by lv

  Hi, I was just wondering whether in C is it possible to peek in the input buffer or perform similar trickery to know whether a call to fgets would block at a later time. Java allows to do something like that by calling BufferedReader.ready(), this way I can implement console input something like this: while (on && in.ready()) { line = in.readLine(); /* do something with line */ if (!in.ready()) Thread.sleep(100); } this allows an external thread to gracefully shutdown the input loop by setting on to false; I'd like to perform a similar implementation in C without resorting to non portable tricks, I already know I can make a "timed out fgets" under unix by resorting to signals or (better, even though requering to take care of buffering) reimplement it on top of recv/select, but I'd prefer something that would work on windows too. TIA

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• C# Serial Communications - Received Data Lost

  - by Jim Fell

  Hello. Received data in my C# application is getting lost due to the collector array being over-written, rather than appended. private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e) { try { pUartData_c = serialPort1.ReadExisting().ToCharArray(); bUartDataReady_c = true; } catch ( System.Exception ex ) { MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } } In this example pUartData_c is over-written every time new data is received. On some systems this is not a problem because the data comes in quickly enough. However, on other systems data in the receive buffer is not complete. How can I append received data to pUartData_c, rather than over-write it. I am using Microsoft Visual C# 2008 Express Edition. Thanks.

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• Begin Viewing Query Results Before Query Ends

  - by Frank Developer

  OK, so say I have a table with 500K rows, then I ad-hoc query with unsupported indexing which requires a full table scan. I would like to immediately view the first rows returned while the full table scan continues. Then I want to scroll thru the next results. In the meantime, I would like to display the progress of the table scan, example: "SEARCHING.. FOUND 23 OF 500,000 ROWS SO FAR". If I scroll too far ahead, I want to display a message like: "REACHED LAST ROW IN LOOK-AHEAD BUFFER.. QUERY HAS NOT COMPLETED".. Can this be done? Maybe like: spawn/exec, declare scroll cursor, open, fetch, etc.?

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• Buffering db inserts in multithreaded program

  - by Winter

  I have a system which breaks a large taks into small tasks using about 30 threads as a time. As each individual thread finishes it persists its calculated results to the database. What I want to achieve is to have each thread pass its results to a new persisance class that will perform a type of double buffering and data persistance while running in its own thread. For example, after 100 threads have moved their data to the buffer the persistance class then the persistance class swaps the buffers and persists all 100 entries to the database. This would allow utilization of prepared statements and thus cut way down on the I/O between the program and the database. Is there a pattern or good example of this type of multithreading double buffering?

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• How to switch off the monitor when mouse reaches the edge of the screen?

  - by evgeny9

  I have 2 computers at home (Windows XP and Windows 7), but one monitor for both of them. They are connected to this monitor using different interfaces: DVI and VGA. I'm also using one keyboard and one mouse to control both PCs with the help of Synergy or Input Director. But I still need to manually switch between monitor interfaces. I wonder, if there's some way (software) that will switch this interfaces (turn off the monitor), when reach the edge of the screen with the mouse. Until now I found several answers, which help to avoid pressing hardware buttons, but still can not do the job automatically based on mouse pointer coordinates. Thank you.

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• Texture repeats even with GL_CLAMP_TO_EDGE set [FIXED]

  - by Lliane

  Hi, i'm trying to put a translucing texture on a face which uses points 1 to 4 (don't mind the numbers) on the following screenshot Sadly as you can see the texture repeats herself in both dimensions, I tried to switch the TEXTURE_WRAP_S from REPEAT to CLAMP_to_EDGE but it doesn't change anything. Texture loading code is here : gl.glBindTexture(gl.GL_TEXTURE_2D, mTexture.get(4)); gl.glActiveTexture(4); gl.glTexParameterf(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_LINEAR); gl.glTexParameterf(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_RGBA, shadowbmp.width, shadowbmp.height, 0, gl.GL_RGBA, gl.GL_UNSIGNED_SHORT_4_4_4_4, shadowbmp.buffer); Texture coordinates are the following : float shadow_bot_text[] = { 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f }; Thanks

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• XML Parsing Error: no element found

  - by Anilkumar

  XML Parsing Error: no element found Line Number 1, Column 1: I want to download a Excel file. I wrote the data in a html table format and appending to the response. The code is following : Response.Buffer = false; Response.Expires = 0; Response.Clear(); Response.ContentType = "application/vnd.ms-excel"; Response.AddHeader("Content-Disposition", "attachment; filename=" + FileName); Response.Write(str); Response.End();

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• How do I bind a key to "the function represented by the following key sequence"?

  - by katrielalex

  I'm just starting to learn emacs (woohoo!) and I've been mucking around in my .emacs quite happily. Unfortunately, I don't know Lisp yet, so I'm having issues with the basics. I've already remapped a few keys until I fix my muscle memory: (global-set-key (kbd "<f9>") 'recompile) That's fine. But how can I tell a key to 'simulate pressing several keys'? For instance, I don't know, make <f1> do the same as C-u 2 C-x } (widen buffer by two chars). One way is to look up that C-x } calls shrink-window-horizontally, and do some sort of lambda thing. This is of course the neat and elegant way (how do you do this?). But surely there's a way to define <f1> to send the keystrokes C-u 2 C-x }?

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• C++'s unordered_map / hash_map / Google's dense_hash - how to input binary data (buf+len) and insert

  - by shlomif

  Hi all, I have two questions about Google's dense_hash_map, which can be used instead of the more standard unordered_map or hash_map: How do I use an arbitrary binary data memory segment as a key: I want a buffer+length pair, which may still contain some NUL (\0) characters. I can see how I use a NUL-terminated char * string , but that's not what I want. How do I implement an operation where I look if a key exists, and if not - insert it and if it does return the pointer to the existing key and let me know what actually happened. I'd appreciate it if anyone can shed any light on this subject. Regards, -- Shlomi Fish

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• Are there any Spreadsheet apps that are as easy and powerful to use as Vim?

  - by ovatsug25

  I'd like to use a spreadsheet that lets me move around cells like I do in Vim. As well, the more commands that are attributed to keyboard shortcuts, the better. Particularly stuff like making Text-to-Columns which is one of my more frequently used features in Excel. I don't mind learning the shortcuts if they allow me to just look at the spreadsheet page and forget about everything else. edit: The way I am thinking about the Spreadsheet right now is as if every cell is its own unique file. There should be a command where I choose to open that file and edit it right on the spot within the view of the spreadsheet. So I guess I want different modes like in vim which have commands and there should be one mode that is hooked up just to do operations or formatting which would be similar to command mode in Vim.

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• Horizontally Flip a One Bit Bitmap Line

  - by roygbiv

  I'm looking for an algorithm to flip a 1 Bit Bitmap line horizontally. Remember these lines are DWORD aligned! I'm currently unencoding an RLE stream to an 8 bit-per-pixel buffer, then re-encoding to a 1 bit line, however, I would like to try and keep it all in the 1 bit space in an effort to increase its speed. Profiling indicates this portion of the program to be relatively slow compared to the rest. Example line (Before Flip): FF FF FF FF 77 AE F0 00 Example line (After Flip): F7 5E EF FF FF FF F0 00

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• Computer not booting, black screen, no beeps

  - by Michael Gaddass

  I bought a pre-owned computer on Ebay. It booted fine, had to reset due to it not detecting USB mouse, but it detected the USB keyboard. Booted fine again, then I tried to install Ubuntu Desktop, when it was installing I got a phone call, when I'm answering it, I find a Blue screen of Death. I reboot the computer and nothing, no BIOS boot, no beeping, but one of the fans was on. I opened the cover and found a large amount of dust, removed it, still not booting. I'm a complete novice with computer repairs, the most advanced thing I did was take a 286 harddrive and replace a 486's damaged harddrive with it (put the drive into the 486 that is), what could possibly be causing this?

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• Handling of data truncation (short reads/writes) in FUSE

  - by Vi

  I expect any good program should do all their reads and writes in a loop until all data written/read without relying that write will write everything (even with regular files). Am I right? Implemented simple FUSE filesystem which only allows reading and writing with small buffers, very often returning that it is written less bytes that in a buffer (using -o direct_io). Some programs work, some not (notably mountlo). Are them buggy or programs should not expect truncated writes and reads from the regular files? In general, are seekable file descriptors expected to truncate data like sockets and pipes?

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• HP Pavilion dv3 volume control display driver on Windows 7

  - by Farinha

  I've recently bought an HP Pavilion dv3-2150ep and I'm having a hard time getting the volume control display to work as expected. The control is a back-lit touch-sensitive bar above the keyboard. Now the buttons to turn the volume up and down actually do it, but the lightning is not changing at all. The mute button does change color when toggled. I'm not sure if I'm missing any drivers here (I've installed all of those on the HP support page that seem to have something to do with sound and/or display) or if I have to activate this somewhere. Any ideas?

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• KVM Switch for a mac and a Windows (XP or 7) machine to share VDU

  - by Adrian Parker

  Have a MacPro (snow leopard) connected to an (windows standard) Asus 25" monitor via a DVI--VGA adapter. Now the boss wants me to work from home, so I want to share my Asus display with a Windows XP laptop. No doubt once my wife sees this, she will want to do the same thing, but with a Windows 7 laptop. So what I would like, I think, is your recommendations for a KVM switch (or better solution) that allows the Mac and a (windows 7 or windows xp) laptop to share the Asus display. Bonus marks if they can share Apple keyboard and magic mouse, but am quite happy to use separate mouse keyboards. The MacPro is the one that is always connected, the laptops come and go. Any ideas? Thanks in advance for any help.

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• Windows 2003 to log on no matter how it turned off

  - by Arya

  I have a windows server 2003, which I use Teamviewer to connect to. When there is a power failure, and the computer restarts, it will not load Teamviewer. It gets stuck on a screen which asks why the computer was turned off. There is no keyboard or mouse connected to the server and I need Teamviewer to open every time. I don't want the screen asking why it was turned off to show up ever. I turned off Shutdown Event Tracker by doing the following: Open gpedit.msc Computer Configuration Administrative Templates System click Display Shutdown Event Tracker and then selected the disable radio button. Is this enough to prevent that screen to show up again? or is there anything else I need to change?

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• In windows 7, how do I disable "Ease of Access" pop ups on the logon screen as I am typing my password?

  - by Silfheed

  So the question is pretty much in the title. Things to note: 'Use On-Screen Keyboard' is un-checked I have disabled Ease of Access by replacing utilman.exe But my problem now is that when I'm typing my password, It'll stop all together on the 'u' or the 'p' character and I have to click on the ease of access button then move focus back to the password to continue. Yes, one obvious solution is to not use a password that has 'u' or 'p' in it (which I've done), but that's obviously not a completely satisfying answer. Thanks! I feel a tumbleweed badge...

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