From e0db0c74b96b8a843e9260749ebbbcbacbabd139 Mon Sep 17 00:00:00 2001 From: Danylo Piliaiev Date: Wed, 27 Feb 2019 17:10:42 +0200 Subject: [PATCH] intel/fs: Make alpha test work with MRT and sample mask Fix the order of src0_alpha and sample mask in fb payload. From SKL PRM Volume 7, "Data Payload Register Order for Render Target Write Messages": Type S0A oM sZ oS M2 M3 M4 SIMD8 1 1 0 0 s0A oM R SIMD16 1 1 0 0 1/0s0A 3/2s0A oM It also fixes working of alpha to coverage with sample mask on GEN6 since now they are in correct order. Signed-off-by: Danylo Piliaiev Signed-off-by: Francisco Jerez Reviewed-by: Francisco Jerez --- src/intel/compiler/brw_fs.cpp | 35 +++++++++++++++++------------------ 1 file changed, 17 insertions(+), 18 deletions(-) diff --git a/src/intel/compiler/brw_fs.cpp b/src/intel/compiler/brw_fs.cpp index 635f727..0c2439d 100644 --- a/src/intel/compiler/brw_fs.cpp +++ b/src/intel/compiler/brw_fs.cpp @@ -4281,6 +4281,23 @@ lower_fb_write_logical_send(const fs_builder &bld, fs_inst *inst, length++; } + if (src0_alpha.file != BAD_FILE) { + for (unsigned i = 0; i < bld.dispatch_width() / 8; i++) { + const fs_builder &ubld = bld.exec_all().group(8, i) + .annotate("FB write src0 alpha"); + const fs_reg tmp = ubld.vgrf(BRW_REGISTER_TYPE_F); + ubld.MOV(tmp, horiz_offset(src0_alpha, i * 8)); + setup_color_payload(ubld, key, &sources[length], tmp, 1); + length++; + } + } else if (prog_data->replicate_alpha && inst->target != 0) { + /* Handle the case when fragment shader doesn't write to draw buffer + * zero. No need to call setup_color_payload() for src0_alpha because + * alpha value will be undefined. + */ + length += bld.dispatch_width() / 8; + } + if (sample_mask.file != BAD_FILE) { sources[length] = fs_reg(VGRF, bld.shader->alloc.allocate(1), BRW_REGISTER_TYPE_UD); @@ -4304,24 +4321,6 @@ lower_fb_write_logical_send(const fs_builder &bld, fs_inst *inst, payload_header_size = length; - if (src0_alpha.file != BAD_FILE) { - /* FIXME: This is being passed at the wrong location in the payload and - * doesn't work when gl_SampleMask and MRTs are used simultaneously. - * It's supposed to be immediately before oMask but there seems to be no - * reasonable way to pass them in the correct order because LOAD_PAYLOAD - * requires header sources to form a contiguous segment at the beginning - * of the message and src0_alpha has per-channel semantics. - */ - setup_color_payload(bld, key, &sources[length], src0_alpha, 1); - length++; - } else if (prog_data->replicate_alpha && inst->target != 0) { - /* Handle the case when fragment shader doesn't write to draw buffer - * zero. No need to call setup_color_payload() for src0_alpha because - * alpha value will be undefined. - */ - length++; - } - setup_color_payload(bld, key, &sources[length], color0, components); length += 4; -- 2.7.4