Programming :: Display Images Whilst Running Other Functions?
Nov 4, 2010
So I'm teaching myself some scripting to try and create a fairly simple photobooth type affair... I've got gphoto2 playing fairly nicely with my canon, and imagemagick taking that output and rearranging it to a vertical format...
EDIT:
*smacks forehead*
Fairly simple to do what I needed initially: Code: feh -FZ -D 1 --cycle-once $COUNTDOWN & sleep 2 &
feh -FZ -D 20 --cycle-once $SMILE This shows a countdown from 5 to 1 in images and $SMILE is big that says 'smile'
So my question is thus... (fairly basic but I can't get my head round the use of & and sleep in this context) what's the best way to call my gphoto instructions (or a script with them in) mid way through the above code?!
'feh code'
sleep 5
'gphoto code'
this kind of thing seems like the way, but the'sleep 5' and 'gphoto code' doesn't start until feh is finished in this case?
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May 12, 2010
What is the efficient way to display jpeg images in browsers using c programming. Any links or any sample code.
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Jul 29, 2010
I have this function that is supposed to print draw the first image from a function then hide the rest of the images using 'display: none' however for some reason the boolean test does not seem to work on one of my servers however it works on another, is there some php.ini setting I am missing or can you see any issues with the following code:
[Code]....
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May 5, 2011
I'm new to openSuse after installing it on my work machine as a replacement for Ubuntu.
I have Evolution mail up and running and all is well other than I am having a problem when receiving mail.
When I first start Evolution, it checks and downloads my new mail without any issues however whilst it is running it won't download any mail, either automatically or manually via the Send & Receive button.
It appears to be checking my accounts (the progress box pops up briefly) and is not reporting any errors, just not downloading until I close Evolution and then restart.
Sending is working perfectly.
I must admit that I "imported" my old mail in a bit of a cack-handed fashion and did have to uninstall/re-install Evolution - I noticed that it uninstalled a few extra packages however when I reinstalled, it only selected the main Evolution packages.
The fact that it is receiving on Evolution start-up I think rules out my settings being incorrect.
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Mar 11, 2010
Is it possible to define functions within other functions in C++? I know it is the case in other languages.
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Apr 11, 2011
I need help as I am not proficient with Linux C++ Programming. There are two parts which I need to do in the coding provided below.
1. Produce the program so it can output the word "Hey there!" and wait two minute and print the word "See you later!".
2. Produce the program that will output the text "Cool" every 20 seconds by setting a periodic task.
Quote:
#include <linux/kernel.h>
#include <linux/module.h>
MODULE_LICENSE("GPL");
int init_module(void)
{
printk("Hey there!
[Code]...
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Sep 17, 2010
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Mar 16, 2010
I run X only under duress. For years I have used svgalib clients. I haven't gotten svgalib to work on my new machine (or X, either, a different matter). I have come tantalizingly close.Is there any other non-X image displayer?
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Aug 15, 2010
I recently migrated to a newer server running centos5 and cpanel
I have imagemagick installed
I installed freetype as well
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.png are fine
.jpg are fine
I have not tested all the possible varieties of images, but .gif I know is not displaying.I am sure its some kind of RPM I am missing or a configuration problem.
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Mar 19, 2011
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Apr 13, 2011
Firefox in my Fedora 14 cannot display the product images in the following web page
[URL]
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I have tried Firefox 4 in Windows XP can display without problem.
uname of my system is 2.6.35.12-88.fc14.x86_64
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Oct 23, 2010
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Jan 5, 2010
I m mew at linux programing an working on a project that is sort of cctv cmra monitoring i m now facing problem with part of my program for displaying the received image in window and also updating it timely by closing and opening new window or refreshing the same one...........i have no idea where to start study ........system command "display" is not fulfilling the purpose... its not refreshing until window is closed manually, control to the program is not returning back without forcefully closing.
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Mar 26, 2011
could you please explain few questions about systemtap.
1st
===
seems gettimeofday_s() always returns 0 Code: stap -ve 'probe timer.s(4){ printf("%d ",
[code]....
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Nov 14, 2010
I'm using 10.10 dual booted with xp and I'm trying to get images that are part of a docx file to open with OO 3.2 in ubuntu
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Apr 24, 2010
Where are the definitions for C library functions located? It was just recently that I realized that header files don't actually define any functions, they merely include their prototypes.
For instance, stdio.h includes the following line:
Code:
This just means that the definition of printf() is located in another file. What file? Is there some kind of default shared object file that is automatically included during compilation?
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Apr 4, 2011
I have problem to use an alias that defined in ksh93 script,in the functions in the same script onm Linux.I definied an alias in main: alias echo='echo -e' in order that echo will read backslashes but when i executed it in function, the alias didnt work, and performewd a regular echo, without -e
cat test.ksh
#!/bin/ksh
alias echo='echo -e'
checkUsage
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May 15, 2011
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Aug 12, 2010
But what is the difference between this...
Code:
my_fucnction () {
echo "Hello World"
}
Code:
function my_fucnction {
[Code]...
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Jan 4, 2011
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Apr 12, 2010
I am trying to write a simple program in C that involves nesting switches. For example switch 1 offers an option to go to module 1 or 2 or quit. when I go to module 1 there is another switch function offering two or more choices.
I can select either module 1 or 2 at the start of the program and the selection text for, say, module 1 prints to screen but then exits without allowing a second selection to be entered.
I tried using free([first selection]) thinking that might do the trick but it doesn't.
Is it possible to next switches on after another in C?
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May 9, 2010
The pthreads library on macos does not have barrier functions (pthread_barrier_t ....). Is there a way to get around this? I know I can do :
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#else
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#endif
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Dec 21, 2010
Let's show the problem: I have a socked connection (in a fd var). In certain moment, I need to use the same socket in two threads. Lets see in the example:
Code: int main(void)
{
int fd; // the socket
[code]....
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Feb 1, 2010
I have functions which return different data like: int, char*, double...
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My idea is to have an array of structs like this:
Code:
struct type_func_map
{
int type;
void (*func_wrapper_int)(void); //void (*func_wrapper_text)(void); void (*func_wrapper_real)(void);
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[Code].....
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Apr 11, 2011
I feel like there should be a cleaner way of doing this. I have one file, for example "a.cpp", calling a function from another file, "b.cpp". Currently I have it set up so that header for "b", "b.h", has the declaration of its functions. And then I'm just including "b.h" in "a.cpp". Do I have to include the "b" header file in "a" to be able to call a function from "b"? Or is there a better way I could be doing this? Like doing something different at compile?
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Jun 24, 2011
I've encountered a problem when running a simple bit of code, I'm using c to read write data to a binary file. It works fine when I run as root. However when I run as a user it produces the file, however when I try to open / write after it's produced it caused a seg fault. Is there any reason file functions ( fopen etc ) would work for root and not a user and is there a way to fix this?
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Feb 5, 2010
I'm trying to call some kernel functions from userspace, but I'm not sure if I'm doing it right. The functions control a pulse width modulator on an embedded platform. To pick one at random, the function:
Code:
struct pwm_device *pwm_request(int pwm_id, const char *label);
is defined in linux/pwm.h, and the implementation uses the macro EXPORT_SYMBOL(pwm_request), so I should be able to call this from user-space... right?
Anyway, I've got linux/pwm.h to #include in my source so the compiler knows what it's doing, but what do I link against? The only place in by kernel build tree where I can see a symbol pwm_request defined is in object files like vmlinux.o, built-in.o in the directory, etc. which I don't think I should be linking against.
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Aug 2, 2010
My distribution is Fedora 12. When I want to get the infos of kernel functions such as printk, i type man printk, failed. I look up some articles and learn that in some distributions the kernel functions is in section 9 of man page. Then i type man 9 printk also no reply. How can i get man pages of kernel functions ?
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Jun 7, 2011
So if you are a PHP-programmer (average one) and code for money, how many of funtions and operators of PHP should you remember by heart (in real life)? I was looking through php.net and man there are millions of tons of them!
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