From 0033c8134401cd4c42845a8e33c001ec62612015 Mon Sep 17 00:00:00 2001 From: Neil Roberts Date: Tue, 24 Nov 2015 16:34:46 +0100 Subject: [PATCH] i965/gen9: Allow fast clears for non-MSRT SRGB buffers SRGB buffers are not marked as losslessly compressible so previously they would not be used for fast clears. However in practice the hardware will never actually see that we are using SRGB buffers for fast clears if we use the linear equivalent format when clearing and make sure to resolve the buffer as a linear format before sampling from it. This is an important use case because by default the window system framebuffers are created as SRGB so without this fast clears won't be used there. Reviewed-by: Topi Pohjolainen --- src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c index 87e0136..88c0a19 100644 --- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c +++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c @@ -259,7 +259,8 @@ intel_miptree_supports_non_msrt_fast_clear(struct brw_context *brw, return false; if (brw->gen >= 9) { - const uint32_t brw_format = brw_format_for_mesa_format(mt->format); + mesa_format linear_format = _mesa_get_srgb_format_linear(mt->format); + const uint32_t brw_format = brw_format_for_mesa_format(linear_format); return brw_losslessly_compressible_format(brw, brw_format); } else return true; -- 2.7.4