Do note you need to div the lpitch by 2.
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DirectDraw skipping lines
Author
Yeah I am using lPitch, but I didn't know you needed to divide by 2. Why is that, every example I have seen uses just lPitch, and I have made other programs that work using just lPitch.
.. oh and one other thing that doesn't explain why it is skipping a row in each individual pixel.
[This message has been edited by Omalacon (edited October 20, 1999).]
Author
For some reason DirectDraw is drawing pixels in a really funny manner, and it does this in every screen mode I have tried. The pixels seem to have a top line, then a skipped line, then another line in the pixel ITSELF! Then on top of that, it skips ever other line.
I am using Direct X 7 interface and writing directly to the surface (yes using the proper procedure of locking the surface and then getting the pointer, and I am in 16bpp and using a WORD array to access the surface)
Anybody seen this before, and know what causes this? Thanks
-Omalacon
The pitch is stored as the number of BYTES that the line takes up, so if the surface is in 24-bit, you must devide by 3 rather than by 2 (16-bit) or 4 (32-bit). Just remember, With and Height are stored as the number of pixels, Pitch is stored as the number of bytes. (Read "Width vs. Pitch" in the SDK docs)
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