Oops, forget what I said about glarc - I broke something.

The other pixel issues are real.

Henry Rich

On 5/31/2013 2:18 PM, Henry Rich wrote:
gl2 for J8 has a number of incompatibilities with J6, and also just
seems a pixel off in some cases.  Since there will be graphics
applications used on both J6 and J8 for a while yet, it seems to me that
J8 ought to do things the J6 way when there is no reason not to.

What I have found so far:

0.  glarc seems to go CW around the ellipse; J6 went CCW

1.  drawing abutting rectangles, with the same color and no pen, should
leave a smooth field; in J8 there are visible joints

2.  drawing text inside a box, the text seems to be shifted one pixel to
the left.  Or maybe the box is one pixel to the right.

3.  When I draw a box with a pen just inside the wdclip rectangle, the
right and bottom are chopped off.  In J6 the cliprect was already one
row/col too short; j8 is even shorter.  This may be related to item 2.

This weekend I will release a graphics application for J6 and J8.  It
formats properly on J6, and exhibits pixel problems on J8.

Henry Rich
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