Henri Verbeet : wined3d: Handle a zero source value for WINED3DSIH_RCP.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ef82681d59ec264b981bb3653ea774044f02fa9c
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=ef82681d59ec264b981bb3653e...

Author: Henri Verbeet 
Date:   Mon Feb  1 13:52:57 2010 +0100

wined3d: Handle a zero source value for WINED3DSIH_RCP.

---

dlls/wined3d/glsl_shader.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c
index fd359b5..ba16cae 100644
--- a/dlls/wined3d/glsl_shader.c
+++ b/dlls/wined3d/glsl_shader.c
@@ -2229,10 +2229,15 @@ static void shader_glsl_rcp(const struct wined3d_shader_instruction *ins)
     mask_size = shader_glsl_get_write_mask_size(write_mask);
     shader_glsl_add_src_param(ins, &ins->src[0], WINED3DSP_WRITEMASK_3, &src_param);

-    if (mask_size > 1) {
-        shader_addline(ins->ctx->buffer, "vec%d(1.0 / %s));\n", mask_size, src_param.param_str);
-    } else {
-        shader_addline(ins->ctx->buffer, "1.0 / %s);\n", src_param.param_str);
+    if (mask_size > 1)
+    {
+        shader_addline(ins->ctx->buffer, "vec%d(%s == 0.0 ? FLT_MAX : 1.0 / %s));\n",
+                mask_size, src_param.param_str, src_param.param_str);
+    }
+    else
+    {
+        shader_addline(ins->ctx->buffer, "%s == 0.0 ? FLT_MAX : 1.0 / %s);\n",
+                src_param.param_str, src_param.param_str);
     }
 }