gallium,st/mesa: don't use blit-based transfers with software rasterizers

The blit-based paths for TexImage, GetTexImage, and ReadPixels aren't very
fast with software rasterizer. Now Gallium drivers have the ability to turn
them off.

Reviewed-by: Brian Paul <[email protected]>
Tested-by: Brian Paul <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gallium/drivers/nvc0/nvc0_screen.c b/src/gallium/drivers/nvc0/nvc0_screen.c
index 73cf0af4d1d..b6cf2ca8a1f 100644
--- a/src/gallium/drivers/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nvc0/nvc0_screen.c
@@ -179,6 +179,8 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_COMPUTE:
       return (class_3d >= NVE4_3D_CLASS) ? 1 : 0;
+   case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
+      return 1;
    default:
       NOUVEAU_ERR("unknown PIPE_CAP %d\n", param);
       return 0;