>From a1408fdcd9ae1ea432e3848c22b4df2ea63ebcda Mon Sep 17 00:00:00 2001
From: Arpad Borsos <arpad.bor...@googlemail.com>
Date: Sun, 11 Apr 2010 14:22:17 +0200
Subject: [PATCH] softpipe: Fix division by zero
This can be triggered by running the cairo tests using the gl backend and softpipe
---
src/gallium/drivers/softpipe/sp_setup.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/gallium/drivers/softpipe/sp_setup.c b/src/gallium/drivers/softpipe/sp_setup.c
index 85966bc..e64aee6 100644
--- a/src/gallium/drivers/softpipe/sp_setup.c
+++ b/src/gallium/drivers/softpipe/sp_setup.c
@@ -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;
}
--
1.7.0
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