st/mesa: optionally apply texture swizzle to border color v2

This is the only sane solution for nv50 and nvc0 (really, trust me),
but since on other hardware the border colour is tightly coupled with
texture state they'd have to undo the swizzle, so I've added a cap.

The dependency of update_sampler on the texture updates was
introduced to avoid doing the apply_depthmode to the swizzle twice.

v2: Moved swizzling helper to u_format.c, extended the CAP to
provide more accurate information.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gallium/drivers/nv50/nv50_screen.c b/src/gallium/drivers/nv50/nv50_screen.c
index 55081beb300..5aa8ef32e65 100644
--- a/src/gallium/drivers/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nv50/nv50_screen.c
@@ -186,6 +186,8 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
       return 0;
+   case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
+      return PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50;
    default:
       NOUVEAU_ERR("unknown PIPE_CAP %d\n", param);
       return 0;