From 649173b473ded2d7b1aded91cd4aab42eaeb5766 Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Sat, 31 Jan 2015 23:36:52 -0800 Subject: [PATCH] i965/fs: Implement texture projection support. Our fragment program backend implements support for TXP directly, and there's no NIR lowering pass to remove the projection. When we switch fragment program support over to NIR, we need to support it somehow. It's easy enough to support directly. v2: Split out offset/tex_offset rename (requested by Jordan). Signed-off-by: Kenneth Graunke Reviewed-by: Jordan Justen --- src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp index 98ea70c..0b8ed1a 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp @@ -1744,6 +1744,7 @@ fs_visitor::nir_emit_texture(nir_tex_instr *instr) int lod_components = 0, offset_components = 0; fs_reg coordinate, shadow_comparitor, lod, lod2, sample_index, mcs, tex_offset; + fs_reg projector; for (unsigned i = 0; i < instr->num_srcs; i++) { fs_reg src = get_nir_src(instr->src[i].src); @@ -1796,7 +1797,8 @@ fs_visitor::nir_emit_texture(nir_tex_instr *instr) offset_components = instr->coord_components; break; case nir_tex_src_projector: - unreachable("should be lowered"); + projector = retype(src, BRW_REGISTER_TYPE_F); + break; case nir_tex_src_sampler_offset: { /* Figure out the highest possible sampler index and mark it as used */ @@ -1820,6 +1822,13 @@ fs_visitor::nir_emit_texture(nir_tex_instr *instr) } } + if (projector.file != BAD_FILE) { + fs_reg invproj = vgrf(glsl_type::float_type); + emit_math(SHADER_OPCODE_RCP, invproj, projector); + for (int i = 0; i < 3; i++) + emit(MUL(offset(coordinate, i), offset(coordinate, i), invproj)); + } + if (instr->op == nir_texop_txf_ms) { if (brw->gen >= 7 && key_tex->compressed_multisample_layout_mask & (1 << sampler)) { -- 2.7.4