Displaying bitmap from file

[Vortex]

Hi friends,

Here is a demo program displaying a bitmap from file without using the conventional Win32 resource system.

[Anonymous]

Here is another version using my CreateBmpFromMem function.

Code Select Expand

hBitmap=CreateBmpFromMem(hwnd,pBitmap);

[Vortex]

Sorry I forgot to login, the guest was me

[Vortex]

The DC created by CreateBmpFromMem was not released at the exit of the application - bug fixed.

[Vortex]

CreateBmpFromMem function translated to POASM

[czerny]

Hallo Vortex!

I would like to learn, howto include asm files in an Pelles C projekt. So I played a little with your example. I have removed the depandencies from other crts.

I get the following error while building the project:

Building Bmpfile.obj.
Building BmpMem.obj.
*** Error:  -W0 -Cu  -Fo"E:\c\src\bmp\output\BmpMem.obj" "E:\c\src\bmp\BmpMem.asm"
*** Error: file not found. 
Done.

Shouldn't there be 'poasm'  in front of the command line?
Is the ide able at all to compile the asm file automatically?

czerny

Edit: I found it!

The make macro AS was empty and the ASFLAGS -W0 and -Cu were wrong.
May be you have used an other assembler? What should the above switches do?

[czerny]

Another question!

the file 'BmpMem.obj' is created in the output directory, like other obj-files.
But ...

Building Bmpfromfile.exe.
POLINK: fatal error: File not found: 'BmpMem.obj'.
*** Error code: 1 ***
Done.

If  I copy the file in the project root directory, I get ...

Building Bmpfromfile.exe.
POLINK: error: Symbol '_CreateBmpFromMem@12' is multiply defined: 'BmpMem.obj' and 'E:\c\src\bmp\output\BmpMem.obj'.
*** Error code: 1 ***
Done.

Thats funny! In the first step it couldn't find it at all. Now it finds it twice!

Is it possible to solve this puzzle without expanding the lib path?

czerny

[Vortex]

Hi czerny,

Here is the project updated with Pelles C V7. Removing the assembly module from the library and object files line solved the problem. Now, the assembly code is a member of the project files. It's assembled with Poasm. The original example from 2006 has probably an outdated .ppj file.

[czerny]

Thank you!

[Vortex]

Hi czerny,

Rewriting CreateBmpFromMem in C :

Code Select Expand

HBITMAP __stdcall CreateBmpFromMem( HWND hwind , LPVOID pImg , HDC* tempDC)
{
HDC hdc;

char *bmpheader = (char *)pImg + sizeof(BITMAPFILEHEADER);


LPVOID lpbInit = (LPVOID)((int)pImg + ((LPBITMAPFILEHEADER)pImg)->bfOffBits) ;

hdc=GetDC(hwind);
*tempDC=hdc;

return (CreateDIBitmap(hdc,
(LPBITMAPINFOHEADER)bmpheader,
CBM_INIT,lpbInit,
(LPBITMAPINFO)bmpheader,
DIB_RGB_COLORS));
}