I could easily paste images on each other in Python through PIL (Python Imaging Library)
Now I need to use Cairo with C++ for the above purpose.I have referred the following but couldn't ge
I want to build a simple OCR program and I was wondering what library to use. The images are saved on my hdd as colour .png files, i won't be using any effects on them but I will be working with pixels a lot, so direct access to them would really be great.So I was curious if there's a lib that provides direct access to individual pixels and pretty much nothing else (libpng, devIL or QImage from qt are all good but each has it's downfalls).
View 8 Replies View RelatedI have a requirement like this:Cut the characters from each line of a file with following positions: 21-24, 25-34 ,111-120.Thse fields now need to be placed in a tab delimited output file.Currently this is how I am achieving it:
#!/bin/sh
cat newsmaple.txt | cut -c 21-24 > out1.txt
cat newsmaple.txt | cut -c 25-34 >out2.txt
[code]....
I have a tab-delimited txt file as below. It is part of the original file.Quote:
##Hello
##Welcome
#C1 C2 C3
[code]....
I'm reading about shared, static, and dynamic libraries. What is SDL? Is it static, shared, or dynamic?
I always thought a library would be a lot of .h and .cpp files compiled separately into .o files and then if you compiled your own program you could use the -l parameter to link the library and it was all compiled together. Now I'm not so sure.
I don't even see any SDL .cpp files in my system anywhere. All I have are lots of SDL .h files in /usr/include/SDL and I don't really understand the code in them.
I'm making a wild guess here: SDL is a shared library. SDL itself is NOT compiled into my program, therefore SDL must be on any system my program tries to run on. When I compile and link SDL all it needs is the header files to know what SDL function and objects it can use. And then on every system it uses an already compiled SDL shared library thingy somewhere.
So... where is that part of SDL? All I can find are header files.
I'm thinking the advantage of shared libraries is that someone could say update SDL on their own system and take advantage of the new features without having to download new executables with the new version of SDL compiled into them for every program that uses SDL.
So if I'm making an editor and a game engine and they both use a lot of the same .cpp and .h files that I wrote and I'm tired of updating one and then the other and I need to turn them into a library, then a shared library might be kind of a silly solution. I could just make a static library. Right? Because it's not SDL. Nobody else is ever going to use this library.
Currently I am installing Cairo 1.6.4. I have followed the instructions mentioned in [URL]. When I try to install using "make install" I am getting the following error,
Making install in src
make[1]: Entering directory `/tmp/rrdbuild/cairo-1.6.4/src'
make[2]: Entering directory `/tmp/rrdbuild/cairo-1.6.4/src'
test -z "/usr/local/lib" || /bin/mkdir -p "/usr/local/lib"
[code]....
How can we convert a dynamic library (filename.so) to a static library (filename.a) using gnu gcc . Can we get a static library form a dynamic library . I saw a few post in which the conversion form a static library to a dynamic library is mentioned but, unfortunately, not the other way.
View 4 Replies View RelatedI have created a glade file which so far have two regions in it:
1) On the right division is a toggle button which calls a C script when enabled.
2) I have a drawing area, in which I would like to plot a point (X-Y scatter plot). The plot should be generated dynamically using a C script. I am not sure how the integration between the two is possible for a drawing area.
In glade what properties of drawing area should I set? eg.expose event, realize etc. I was thinking of using cairo for generating the plot.
I have just exported 3 png files out of gimp for a html document I'm working on right now, and they are all almost the same, except I need each to load when the user does something. So the first image will display on the page, and when a user puts their cursor over it, then it will load image 2. When they press it, it loads image 3.
View 1 Replies View RelatedToday I was using Gchempaint (part of Gnome Chemistry Tools) and found that the F12 version fails miserably to correctly export H to xyz. So I decided to install the latest version I found (0.11). There are, however, some problems I must sort out during compilation.
Apparently it does not see my 'cairo' installation and so I get the following error message:
Code:
checking for cairo... configure: error: Package requirements (cairo >= 1.6.0) were not met: No package 'cairo' found
Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix.Alternatively, you may set the environment variables cairo_CFLAGS and cairo_LIBS to avoid the need to call pkg-config. See the pkg-config man page for more details.
How to make simple games (snake, pong... nothing too fancy). I have completed making snake and now want to be able to distribute it. I built it using C++ and wxWidgets so it would be multi-platform. I'm able to compile it and run it in both Windows and Ubuntu using g++. In windows, I was able to distribute it by putting a *.dll file in the same folder as the executable. However in Linux, I don't understand what I need to do so that it would run on any installation of Ubuntu out of the "box". When I build it and try to run it in a different installation of Ubuntu (which has g++) it gives me an error saying that a particular library file was not found and Getlibs fails to find that library file.
Is there a way to build a project with G++ so that all the dependencies are either packaged in the executables or copied into the folder....?
I'm trying to make one that has some sorts in it for now. I know you have to make a header file and a .cpp file. I'm using VC++(yes, I'm in school so windows in needed. I use Ubuntu at home I swear D if it makes a difference. What goes in the header file, how is the cpp file set up, and then where do I put the files once I'm done?
View 5 Replies View Relatedbluetoth library for c++
View 2 Replies View Relatedi have a code written in c..for which i was trying to create a gui using Gtk+.but now i want to use qt4 for the same purpose but native language of qt4 is C++. i have to do library binding for my C code to develop a gui using qt4.
View 5 Replies View RelatedI am trying to write a program that can get the times from files on a NTFS drive in Linux using the ntfs-3g library. I have installed the development libraries and source on my Fedora 10 machine. I can find the headers in the /usr/include/ntfs-3g directory but when i try and compile my program I am getting an undefind reference to ntfs_mount() call. I have the following in my link string
g++ -L/lib -o ProgramName -lpthread -lntfs-3g
I did a pkg-config --cflags --libs libntfs-3g and it said all i needed was the -L/lib -lpthread and -lntfs-3g.
To create a static library, or to add additional objectiles to an existing static library, I can use a command like this:ar rcs my_library.a file1.o file2.oBut how to add an existing static library to my own static library. I have created my own static library using the command above and want to link against the library libuuid.a (placed in /usr/lib/).
View 6 Replies View RelatedI jus found that #include<stdio.h> is not working with gcc and neither any function from the library like clrscr(); i found due to <stdio.h> is a windows lobrary file so its not come with linux. But I want to to know if I have to call any function from that library what should I do? Is there any way to install <stdio.h> in linux?
View 5 Replies View RelatedWhere 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?
Where is the location of the header files for the c++ standard library?
I assume that they were installed by gnu g++, please correct me if i'm wrong.
I'm running ubuntu 10.04 with g++ 4.4.
I looked in /usr/lib/gcc/i486-linux-gnu/4.4/include, but this directory contains only the following:
Code:
Which doesnt seem to include the really basic things like iostream, for example.
Where can I take a look at the header files for these standard c++ libraries?
I'm trying to learn how to cross-compile libraries (static and shared) and executables for the Blackfin + uClinux environment.At this point, I can successfully compile a stand-alone "Hello, world" but fail when trying to add a (static) library to the mix.Here's the source code I wrote:
Code:
#========== bar.h
void mytestfunc(void);
#========== bar.c
#include <stdio.h>
[code]...
Googling for this returns talks about "name mangling", but I don't know if this is what it is, and how to change the source/command to solve it.
I have visited these boards a few times, but never posted. Here's my problem: I was given the source to a program and asked to get it running on a 64-bit Debian 2.6.26 machine. Currently it is working on 2 64-bit OpenSUSE machines.
The application uses TCL TK for a GUI and everything compiles just fine; however, on startup, the user must enter one of three possible modules to load; when attempting to load these modules (tcl 'load' function), I receive this error:
Code:
Error in startup script: couldn't load file "../Build/libMpf.so": libTransReaders.so: cannot open shared object file: No such file or directory
while executing
"load ../Build/libMpf.so Mpf"
("eval" body line 1)
invoked from within
"eval load ../Build/${px}${i}${sx} $i"
[Code]...
is there a way to debug my library files from DDD? Basically a way to pass the paths to DDD so I can view the source etc. I'm having a segmentation nightmare, which only crops up about every 10 or so starts, I know it's in one file in a library. I could move the source file into my general code to debug, but am sure there's a way in DDD.
View 1 Replies View RelatedI need to create a software library with two copy file routines in it. This library will be used in a TCL script. I know how to write the routines, but I have never created a library before. How do I do this?
View 6 Replies View RelatedI am trying to use the QT4 frontend of poppler library in my application so I need to compile the library.In its main directory ./configure can be run but I got
Code:
checking which font configuration to use... fontconfig
checking for FONTCONFIG... no
configure: error: Package requirements (fontconfig >= 2.0.0) were not met:
No package 'fontconfig' found
Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. Alternatively, you may set the environment variables FONTCONFIG_CFLAGS
and FONTCONFIG_LIBS to avoid the need to call pkg-config.See the pkg-config man page for more details.
I have fontconfig installed (ubuntu):
2.8.0-2.1ubuntu3 (fontconfig)
However I have no idea where those flags are and what to set them to.
Is there any library in C(C++) for web server connection?because I do not want use socket.
View 1 Replies View RelatedIf we have a .so library elf in linux, will it be possible to find out the APIs supported by it. Or in other words, the functions that can be used along with the argument types and return type.? Note that we dont have any other header files or documentations related to the library.
View 5 Replies View Relatedin the directory of /var/log , i see some directory like apache2 , apt , gdm , i wonder does all these folders was made under the syslogd ? i mean do these utilities use syslogd to log their messages or they use their own systems , for example apache use syslog or use its own library?
View 1 Replies View RelatedI am running on windows, i don't have strlcpy() function as it's not a standard function, so i want to add it to my library, i know how to do that thankfully ^_^This is the function:
Code:
/*$OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $*/
/*
[code]....
If I would normal compile using the following line:
Code:
Where should those library flags go in a makefile? Say I having the following makefile:
Code:
all: ${PROGS}
clean:
I have an application with a complex binary build procedure which links against 30+ application library archives and an array of system library archives. The problem I'm having is the link ordering. Is there a way to tell the g++ linker to keep searching the libraries for unresolved references, regardless of order, instead of rearranging the order the archives are listed on the command line for a one-time-pass? I'm using g++ 3.2.3 on a Linux AS v3update6 machine.
View 1 Replies View Related