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Loading multiple bitmaps to one surface

Started by BenB Dec 14, 2001 at 1:42 PM 2 replies 450+ views

Original Post

Dec 14, 2001 at 1:42 PM

Hey, I''m curenntly using the "utils.cpp" supllied with the SDK, but I need to load quite a lot bitmaps. With the functions provided, I can only load one bitmap into a surfcae: *lpDDSurface = Utils_LoadBitmap(G.lpDD, szFileName, 0, 0); So the question is, of course, how can load multiple bitmaps into one surface? Thanks a lot...

CaptainJester

101

CaptainJester

Dec 14, 2001 at 2:10 PM

You will have to make on really big surface, then load each bitmap separately and blit them to that surface separately to different areas on the surface.

Basically:

  
LPDDSURFACEDESC7 target;
LPDDSURFACEDESC7 temp;

temp=LoadBitmap(bitmap1);
target->Blt(topleft,temp,...,...);
temp=LoadBitmap(bitmap2);
target->Blt(topright,temp,...,...);
temp=LoadBitmap(bitmap3);
target->Blt(bottomleft,temp,...,...);
temp=LoadBitmap(bitmap4);
target->Blt(bottomright,temp,...,...);

---
Make it work.
Make it right.
Make it fast.

xyzzy00

Dec 14, 2001 at 4:22 PM

Or.. just create your big texture, and then call D3DXLoadSurfaceFromSurface for each image you want to load, each time giving a different destination subrect.

xyzzy

OB1st

Dec 14, 2001 at 6:54 PM

This may not be a great help, but It may be easier to write your code than trying to modify the util.cpp.
in directX7 you load each bitmap into an offscreen surface, and then you blit into the primary surface specifying the coordinates on the primary surface where you want each map to show.

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