How to use BltBitmaprast port or other like it

[Karlos]

Are you blitting from one bitmap to another or a section of the bitmap to somewhere else in the same bitmap?

When you create your bitmap, do you specify the BMF_DISPLAYABLE flag? Do yo make it a friend of an existing bitmap (the one you intend to blit to, for example)?

Post your suspect code section, that's always handy for seeing whats wrong :-)

[Karlos]

Ok, another question..

Are you using CyberGraphX?

[Karlos]

Karlos wrote:
Ok, another question..

Are you using CyberGraphX?

I ask because I found that the depth parameter you give to AllocBitMap() under cgx sometimes caused memory trashing when given as 8 and used with the BMF_SPECIALFMT option (when creating high/trucolour bitmaps).
Also, I never tried manually setting image data before - I always lock the bitmap, write the data and then unlock.

Still if your'e not using cgx, ignore me :-)

[Karlos]

Have to admit, I did think the way the image data was loaded looked suspect. What guarentee was there that it was the same format as the bitmap?


I only got into gfx coding post BVision :-) so I tend to concentrate on gfx-card only stuff...