Mesa already supports this because of NV_fragment_program.
Signed-off-by: Kenneth Graunke <kenn...@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
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
