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i965/nir: enable lowering of texture gradient for shadow samplers 

This gets the lowering on the Vulkan driver too, which is required for
hardware that does not have the sample_l_d message (up to IvyBridge).

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Iago Toral Quiroga 2016-12-13 10:24:19 +01:00
parent 5be2e785b1
commit 77f65b3b64
1 changed files with 3 additions and 0 deletions
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src/mesa/drivers/dri/i965/brw_nir.c
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@ -596,6 +596,9 @@ brw_nir_apply_sampler_key(nir_shader *nir,
tex_options.swizzles[s][c] = GET_SWZ(key_tex->swizzles[s], c);
}
/* Prior to Haswell, we have to lower gradients on shadow samplers */
tex_options.lower_txd_shadow = devinfo->gen < 8 && !devinfo->is_haswell;
tex_options.lower_y_uv_external = key_tex->y_uv_image_mask;
tex_options.lower_y_u_v_external = key_tex->y_u_v_image_mask;
tex_options.lower_yx_xuxv_external = key_tex->yx_xuxv_image_mask;