[Mesa-dev] [PATCH 3/3] llvmpipe: enable ARB_texture_gather

[sroland at vmware.com]

From: Roland Scheidegger <sroland at vmware.com>

Just announce support for 4 components.
While here also increase the max/min texel offsets (the limit is completely
artificial, was chosen because that's what other hardware did, however there's
other drivers using larger limits).
Over a thousand little piglits skip->pass.
---
 src/gallium/drivers/llvmpipe/lp_screen.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/llvmpipe/lp_screen.c b/src/gallium/drivers/llvmpipe/lp_screen.c
index 4b45725..f4ba596 100644
--- a/src/gallium/drivers/llvmpipe/lp_screen.c
+++ b/src/gallium/drivers/llvmpipe/lp_screen.c
@@ -180,10 +180,10 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    /* this is a lie could support arbitrary large offsets */
    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
    case PIPE_CAP_MIN_TEXEL_OFFSET:
-      return -8;
+      return -32;
    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
    case PIPE_CAP_MAX_TEXEL_OFFSET:
-      return 7;
+      return 31;
    case PIPE_CAP_CONDITIONAL_RENDER:
       return 1;
    case PIPE_CAP_TEXTURE_BARRIER:
@@ -249,6 +249,7 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
       return 1;
    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
+      return 4;
    case PIPE_CAP_TEXTURE_GATHER_SM5:
    case PIPE_CAP_TEXTURE_QUERY_LOD:
    case PIPE_CAP_SAMPLE_SHADING:
-- 
1.9.1