Mesa (master): i965: Guard access to gl_Layer by extension #ifdef

[Kristian Høgsberg]

Module: Mesa
Branch: master
Commit: 14c1a2a94c3d7c0ba375d2b0953b025112b21392
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=14c1a2a94c3d7c0ba375d2b0953b025112b21392

Author: Kristian Høgsberg <krh at bitplanet.net>
Date:   Fri Aug 15 15:59:59 2014 -0700

i965: Guard access to gl_Layer by extension #ifdef

Only assign gl_Layer if we have GL_AMD_vertex_shader_layer.  Gen6 doesn't
(currently) have that extension, but it also doesn't support layered
rendering.

Signed-off-by: Kristian Høgsberg <krh at bitplanet.net>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen at intel.com>
Tested-by: Jordan Justen <jordan.l.justen at intel.com>

---

 src/mesa/drivers/dri/i965/brw_meta_fast_clear.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_meta_fast_clear.c b/src/mesa/drivers/dri/i965/brw_meta_fast_clear.c
index c6540f2..5f3817b 100644
--- a/src/mesa/drivers/dri/i965/brw_meta_fast_clear.c
+++ b/src/mesa/drivers/dri/i965/brw_meta_fast_clear.c
@@ -97,7 +97,9 @@ brw_bind_rep_write_shader(struct brw_context *brw, float *color)
       "uniform int layer;\n"
       "void main()\n"
       "{\n"
+      "#ifdef GL_AMD_vertex_shader_layer\n"
       "   gl_Layer = gl_InstanceID;\n"
+      "#endif\n"
       "   gl_Position = position;\n"
       "}\n";
    const char *fs_source =