Re: [Dev-C++] Dsiplaying images

[Elias P. <eli...@ao...>]

> I fear that won't help cause I don't want to _set_ the parameter I wanna _get_
> these informations of the DIB.

Yes, I looked at the documentation now, and that function already needs some
info. You could always use GetObject() to get the bitmap dimensions.
 
> How to load a Image from disk, let's say "picture.bmp" (which is -just for
> example- about 50k),
> findout its dimensions and display it on the screen?
 
Ok, if that is all you want to do, there's no need for DIBitmaps at all..
I paste some example code which loads and displays a bitmap directly on the
desktop. 

Elias Pschernig
--
#include <windows.h>

int WINAPI WinMain(HINSTANCE hinst,HINSTANCE prev,LPSTR arg,int show) {
   
   HANDLE bitmapHandle;
   HDC sourceDC, destinationDC;  
   BITMAP bitmap; 
   
   // load bitmap from disk
   bitmapHandle = LoadImage(NULL, "test.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
 
   // normally, you will use: destinationDC = GetDC(hWnd); hWnd being the window to
   // draw to, never use the desktop for that, for obvious reasons
      destinationDC = GetWindowDC(GetDesktopWindow());
   
   // Get data from the handle
   GetObject(bitmapHandle, sizeof(bitmap), &bitmap);
   
   // Create compatible device context and tell it to use the bitmap
   sourceDC = CreateCompatibleDC(destinationDC);   
   SelectObject(sourceDC, bitmapHandle);
   // draw the bitmap
   BitBlt(destinationDC, 0, 0, bitmap.bmWidth, bitmap.bmHeight, sourceDC, 0, 0, SRCCOPY);
   // In C, always release stuff you have allocated..
   DeleteDC(sourceDC);   
   ReleaseDC(GetDesktopWindow(), destinationDC);       
         
   return 0;
}