diff options
| author | Zou Nan hai <nanhai.zou@intel.com> | 2007-02-12 12:16:49 +0800 |
|---|---|---|
| committer | Zou Nan hai <nanhai.zou@intel.com> | 2007-02-12 12:16:49 +0800 |
| commit | ebcc9b5d12995cc83c032beeff468c5ecb30b33f (patch) | |
| tree | 6f2585374a0cf1055c7d361a3ef0b5369237a47f | |
| parent | ee5417bca883d82d618e1c0b65011940253555dd (diff) | |
fd.o #BZ 9684
gcc may cast an overflowed float value to an negative int value on i386,
fix it to make sure at least some apps will not crash if it contains wrong normal data.
| -rw-r--r-- | src/mesa/main/light.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mesa/main/light.h b/src/mesa/main/light.h index f47fe58a83..b97e17b5be 100644 --- a/src/mesa/main/light.h +++ b/src/mesa/main/light.h @@ -92,7 +92,8 @@ do { \ struct gl_shine_tab *_tab = table; \ float f = (dp * (SHINE_TABLE_SIZE-1)); \ int k = (int) f; \ - if (k > SHINE_TABLE_SIZE-2) \ + if (k < 0 /* gcc may cast an overflow float value to negative int value*/ \ + || k > SHINE_TABLE_SIZE-2) \ result = (GLfloat) _mesa_pow( dp, _tab->shininess ); \ else \ result = _tab->tab[k] + (f-k)*(_tab->tab[k+1]-_tab->tab[k]); \ |