There is then no difference! My "box" was made up of four blocks. However, I think the width of my vertical blocks is 2. A width of 1 is probably too small.

George
.
On 10 Oct 2005, at 18:09, James Hunkins wrote:

Hi George,

That is exactly what I am doing. The only difference is that I am using block writes to do fast lines (width of 1).

Could you forward me your test program directly to see if I can see any other difference?

Thanks,
jim

On Oct 10, 2005, at 12:00 PM, George Gwilt wrote:


A large number of my programs contain a moveable, resizable outline - and with GD2 colours.

You need to set OVER -1 (or iow.sova with DM_XOR [if that is -1]). Then print the outline (which must not be coloured black!). To move the outline you need to print it again (in the same place) so that it disappears. This is because a XOR (a XOR b) = b. You can now print the outline in a different place. I can confirm that this procedure works in C68 since I have just written a short test program to see if it did.

George

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