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softpipe: Fix division by zero

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This can be triggered by running the cairo tests using the gl backend
and softpipe.

Signed-off-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Arpad Borsos 2010-04-14 14:26:32 -06:00 • committed by Brian Paul
parent d9793fc3ac
commit b3a68cdc6f
1 changed files with 3 additions and 3 deletions
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6
src/gallium/drivers/softpipe/sp_setup.c
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@ -669,17 +669,17 @@ static void setup_tri_edges( struct setup_context *setup )
setup->emaj.sy = ceilf(vmin_y);
setup->emaj.lines = (int) ceilf(vmax_y - setup->emaj.sy);
setup->emaj.dxdy = setup->emaj.dx / setup->emaj.dy;
setup->emaj.dxdy = setup->emaj.dy ? setup->emaj.dx / setup->emaj.dy : .0f;
setup->emaj.sx = vmin_x + (setup->emaj.sy - vmin_y) * setup->emaj.dxdy;
setup->etop.sy = ceilf(vmid_y);
setup->etop.lines = (int) ceilf(vmax_y - setup->etop.sy);
setup->etop.dxdy = setup->etop.dx / setup->etop.dy;
setup->etop.dxdy = setup->etop.dy ? setup->etop.dx / setup->etop.dy : .0f;
setup->etop.sx = vmid_x + (setup->etop.sy - vmid_y) * setup->etop.dxdy;
setup->ebot.sy = ceilf(vmin_y);
setup->ebot.lines = (int) ceilf(vmid_y - setup->ebot.sy);
setup->ebot.dxdy = setup->ebot.dx / setup->ebot.dy;
setup->ebot.dxdy = setup->ebot.dy ? setup->ebot.dx / setup->ebot.dy : .0f;
setup->ebot.sx = vmin_x + (setup->ebot.sy - vmin_y) * setup->ebot.dxdy;
}