Programming

Hello friends , this is not a thread i wanna your advice

I have good knownledge in c language and i can create test based applications

But now i wanna create Graphics application for Linux and windows

In linux , i know there is gtk programming for grahics

and in windows windows.h header file defines these graphics stuff

But now i am confused , firsly i wanna to learn how these graphics work with video driver and how video adapter control these stuff

From where i can start learn about graphics

Please give me any advice .

In essence, the monitor becomes nothing but a big block of memory where each block of 4 bytes represents one pixel. Set the right block to 0xffffffff, and one pixel turns white. The memory's in the video card, not the monitor, but the monitor's contents and the video memory's contents are directly related.

In practice it's a little less direct than that. With all the interrupts and context switches and such happening all the time, if you tried to write to video memory directly all the time, it'd look like junk -- you could never guarantee you'd be able to keep up with the screen, and would see half-done updates and tearing all the time. So they put extra memory in the video card for you to write to without altering the screen, and can rapidly tell the video card "okay, this area of memory's ready, show it next frame".

Dealing with a window manager makes it even more complicated because now you're only allowed to write to part of the screen, and other windows might be sitting on top of yours. Still, it ends up working much the same way, with the video driver and window manager handling the complicated bits of which bytes go where on the screen, you just write to your own little buffer.

libSDL is a nice interface library which lets you use fairly raw video the same way in Windows and Linux and many other operating systems. I wrote SDL_plattest using it, check out raster.c.

Thanks corona it is working and intersting in creating graphics application

it is working greatly in linux

but in windows it is not working with any compiler .

i tried this library in windows with mostly all compilers, code block,dev-cpp,visual c++ .

In what way is it "not working"? I know of no software which prints the error message "not working".

Programmers put more detailed error messages in there to help you and me, since we cannot see your computer from here; we don't know what you did, and don't know what error you got. I don't even know what code you were trying to compile. At best I can make wild guesses. Here's my wild guess:

Nearly any Linux comes with SDL preinstalled(you probably still had to install sdl-devel) but you'll have to download it from the site I linked it to you on -- libsdl.org -- for it to work in Windows, and give your compiler the right paths to use it(or just make blind copies into the right places for each project). There also tutorials on the SDL site on how to use it in many OSes.