How to render a bitmap on a basic window?

[Radioactive]

Im currently learning c++ (well ive read through 1.5 tutorials and remember everything i could use some day) and trying to learn win32 (mostly just basics)

now, can someone tell me how do i render a bitmap (a 2 dimension array) on a basic window? thats all i need... as i want to edit the bits one by one on the array and then render it...

[george135]

Just BitBlt()
Hundreds of samples in MSDN (doc, KB, SDK, etc...)

[Disch]

BitBlt is necessary.

Also, CreateDIBSection is the one to know if you want quick pixel-level access.

I might post an example when I'm not at work. In the meantime you can search MSDN/the web.

[Radioactive]

ok. ill wait for the example so i dont need to read through a ton of tutorials and convert them from c to c++ >.>

[Disch]

well to be honest I totally forgot about this thread yesterday, so I didn't get around to it. Sorry.

Maybe tonight.

[Radioactive]

ok.
i can read some ways to program stuff while waiting (or play a game...)

[Disch]

I started to write some examples but I got lazy and forgot how much fun WinAPI ain't.

So here's links to CreateDIBSection and BitBlt because I'm lazy:

http://msdn.microsoft.com/en-us/library/dd183494(VS.85).aspx CreateDIBSection
http://msdn.microsoft.com/en-us/library/aa930997.aspx

If you have specific questions, I can answer them, but I don't have the energy for a full detailed explanation/tutorial right now. Sorry.

[Radioactive]

i need this to make a simple header to display a 2 dimension array on a window... how do i convert the array to the right form, or is there a better way than array to do it (like making a Bitmap and using a function to draw a pixel on it?)

[Radioactive]

*waits*



*no answer*


*reads microsoft documents*


*cant find the Conver2DArrayToBitMap() function*
*sad face <;C*
*finds out that array to store enuf data for color,depth and bump would take just 12 million bytes for a 1200*1000 screen*

ok i think ive now read enough of microsoft references to be able to make something working.... wich means ill try to do it tomorrow if i have time, or after few days because im uber lazy.

[Radioactive]

O.e too... complex...

i dont know what of those to use... there are too many things that would need to be somehow connected together...

[Disch]

Oh alright.. it's the weekend... I'll whip together an example for you.

Hold.

EDIT:

but note that I'm not on Windows so I won't actually be able to test what I write.


EDIT 2:

Here. I made a whole class for you: http://pastebin.com/m4822d4ff

I *think* colors are in the form 0xAARRGGBB so full red would be 0xFFFF0000 and full blue would be 0xFF0000FF. But you'll want to test that out. Like I said I couldn't test this code (or even compile it) because I don't have a windows machine handy.

You're probably fine leaving AA as 00, since I don't think alpha blending works with BitBlt anyway.

Also, I think WinAPI has a RGB macro for this which you might be able to use.

Example usage:

// make a 100x100 bitmap
Bitmap32 foo(100,100);

// set pixel 40,32 to be full green
foo(40,32) = 0xFF00FF00;

// blit to another dc
HDC screen = /*get the screen dc or whatever */
HDC mydc = foo.GetDC();
BitBlt( /*blit from 'mydc' to 'screen'*/ );

[george135]

> O.e too... complex...

???
It's 8 lines of code.
Copy-paste any of the 1500 MSDN samples, C and C++ : done in 2 seconds (!)