Mesa (master): i965: Enable ARB_texture_gather for one component on Gen6.

[Chris Forbes]

Module: Mesa
Branch: master
Commit: 0c14c5c62a1b4648381c05f024db730e4a0f90c5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0c14c5c62a1b4648381c05f024db730e4a0f90c5

Author: Chris Forbes <chrisf at ijw.co.nz>
Date:   Sun Feb  2 22:00:18 2014 +1300

i965: Enable ARB_texture_gather for one component on Gen6.

Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/brw_context.c      |    2 ++
 src/mesa/drivers/dri/i965/intel_extensions.c |    2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 1879abe..021287e 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -374,6 +374,8 @@ brw_initialize_context_constants(struct brw_context *brw)
 
    if (brw->gen >= 7)
       ctx->Const.MaxProgramTextureGatherComponents = 4;
+   else if (brw->gen == 6)
+      ctx->Const.MaxProgramTextureGatherComponents = 1;
 
    ctx->Const.MinLineWidth = 1.0;
    ctx->Const.MinLineWidthAA = 1.0;
diff --git a/src/mesa/drivers/dri/i965/intel_extensions.c b/src/mesa/drivers/dri/i965/intel_extensions.c
index a0fd354..eb3f2c7 100644
--- a/src/mesa/drivers/dri/i965/intel_extensions.c
+++ b/src/mesa/drivers/dri/i965/intel_extensions.c
@@ -270,6 +270,7 @@ intelInitExtensions(struct gl_context *ctx)
       ctx->Extensions.ARB_texture_multisample = true;
       ctx->Extensions.ARB_sample_shading = true;
       ctx->Extensions.ARB_vertex_type_10f_11f_11f_rev = true;
+      ctx->Extensions.ARB_texture_gather = true;
 
       /* Test if the kernel has the ioctl. */
       if (drm_intel_reg_read(brw->bufmgr, TIMESTAMP, &dummy) == 0)
@@ -284,7 +285,6 @@ intelInitExtensions(struct gl_context *ctx)
    }
 
    if (brw->gen >= 7) {
-      ctx->Extensions.ARB_texture_gather = true;
       ctx->Extensions.ARB_conservative_depth = true;
       ctx->Extensions.AMD_vertex_shader_layer = true;
       if (can_do_pipelined_register_writes(brw)) {