r300g: revisit some assertions and fix potential failures

* Turn some assertions to error messages.
* At most 16 vertex elements can be set, others are ignored.
* Rasterize at most 8 vertex-shader generic outputs, others are ignored.
  This includes fog and WPOS.
* Unknown shader semantic names are ignored.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gallium/drivers/r300/r300_fs.c b/src/gallium/drivers/r300/r300_fs.c
index 0444e58f0d..d9319525d4 100644
--- a/src/gallium/drivers/r300/r300_fs.c
+++ b/src/gallium/drivers/r300/r300_fs.c
@@ -69,7 +69,8 @@ void r300_shader_read_fs_inputs(struct tgsi_shader_info* info,
                 break;
 
             default:
-                assert(0);
+                fprintf(stderr, "r300: FP: Unknown input semantic: %i\n",
+                        info->input_semantic_name[i]);
         }
     }
 }