diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_context.c')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_context.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/src/gallium/auxiliary/draw/draw_context.c b/src/gallium/auxiliary/draw/draw_context.c index 4250f10d13..63ccf386f2 100644 --- a/src/gallium/auxiliary/draw/draw_context.c +++ b/src/gallium/auxiliary/draw/draw_context.c @@ -493,7 +493,7 @@ draw_alloc_extra_vertex_attrib(struct draw_context *draw, uint n; slot = draw_find_shader_output(draw, semantic_name, semantic_index); - if (slot > 0) { + if (slot >= 0) { return slot; } @@ -549,9 +549,10 @@ draw_get_shader_info(const struct draw_context *draw) * attributes (such as texcoords for AA lines). The driver can call this * function to find those attributes. * - * Zero is returned if the attribute is not found since this is - * a don't care / undefined situtation. Returning -1 would be a bit more - * work for the drivers. + * -1 is returned if the attribute is not found since this is + * an undefined situtation. Note, that zero is valid and can + * be used by any of the attributes, because position is not + * required to be attribute 0 or even at all present. */ int draw_find_shader_output(const struct draw_context *draw, @@ -574,7 +575,7 @@ draw_find_shader_output(const struct draw_context *draw, } } - return 0; + return -1; } |