Hi,
clipping of lines at the edges of the viewing volume doesn't seem to
work. The problem occurs both with RADEON_TCL_FORCE_DISABLE and with
LIBGL_ALWAYS_INDIRECT. If I use a glOrtho (-1.0, 1.0, -1.0, 1.0, -1.0,
1.0) projection this works:
glBegin(GL_LINES);
glColor3f(1.0, 0.0, 0.0);
glVertex2f(0.0, 0.0);
glVertex2f(0.5, 0.5);
glEnd();
but this does not:
glBegin(GL_LINES);
glColor3f(1.0, 0.0, 0.0);
glVertex2f(0.0, 0.0);
glVertex2f(1.5, 0.5);
glEnd();
With Radeon HW TCL both work. I've tried to dig into the mesa code. In
the debugger I could see where the clipping And and Or masks are set,
correctly as it seems (clip_test2 called from run_vertex_stage). But I
couldn't find the place where the actual clipping is supposed to occur
:(
The same with GL_LINE_STRIP. I also tried more vertices between glBegin
and glEnd. As soon as one vertex is outside the viewing volume all
lines disappear, even if they are in separate glBegin-End pairs.
I'm using the latest trunk with Mesa 5.0 merged in.
Regards,
Felix
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