[Mesa-dev] [PATCH 3/3] ir_to_mesa: Emit TXD instruction.

[Kenneth Graunke]

Mesa already supports this because of NV_fragment_program.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/program/ir_to_mesa.cpp |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)

I tried testing this by using texture2DGradARB in a fragment shader on swrast,
which didn't work.  AFAIK that's a limitation of swrast, though, and not
necessarily a problem with this code.  Perhaps this is of use to the Gallium
drivers...

diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 3c9b973..16a1c2c 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -1967,7 +1967,7 @@ ir_to_mesa_visitor::visit(ir_call *ir)
 void
 ir_to_mesa_visitor::visit(ir_texture *ir)
 {
-   src_reg result_src, coord, lod_info, projector;
+   src_reg result_src, coord, lod_info, projector, dx, dy;
    dst_reg result_dst, coord_dst;
    ir_to_mesa_instruction *inst = NULL;
    prog_opcode opcode = OPCODE_NOP;
@@ -2009,6 +2009,12 @@ ir_to_mesa_visitor::visit(ir_texture *ir)
       lod_info = this->result;
       break;
    case ir_txd:
+      opcode = OPCODE_TXD;
+      ir->lod_info.grad.dPdx->accept(this);
+      dx = this->result;
+      ir->lod_info.grad.dPdy->accept(this);
+      dy = this->result;
+      break;
    case ir_txf:
       assert(!"GLSL 1.30 features unsupported");
       break;
@@ -2081,7 +2087,10 @@ ir_to_mesa_visitor::visit(ir_texture *ir)
       coord_dst.writemask = WRITEMASK_XYZW;
    }
 
-   inst = emit(ir, opcode, result_dst, coord);
+   if (opcode == OPCODE_TXD)
+      inst = emit(ir, opcode, result_dst, coord, dx, dy);
+   else
+      inst = emit(ir, opcode, result_dst, coord);
 
    if (ir->shadow_comparitor)
       inst->tex_shadow = GL_TRUE;
-- 
1.7.4.4