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ir_to_mesa: Move projection handling out of ir_tex so txb and txl get it.

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Fixes:
glsl-fs-texture2dproj-bias
glsl-fs-texture2dproj-bias-2
This commit is contained in:
Eric Anholt
2010-07-02 15:37:24 -07:00
parent 4d962e66e3
commit d3983ca032
1 changed files with 53 additions and 27 deletions
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80
src/mesa/shader/ir_to_mesa.cpp
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@@ -1287,12 +1287,22 @@ ir_to_mesa_visitor::visit(ir_call *ir)
void
ir_to_mesa_visitor::visit(ir_texture *ir)
{
ir_to_mesa_src_reg result_src, coord, projector;
ir_to_mesa_dst_reg result_dst, lod_info;
ir_to_mesa_src_reg result_src, coord, lod_info, projector;
ir_to_mesa_dst_reg result_dst, coord_dst;
ir_to_mesa_instruction *inst = NULL;
prog_opcode opcode = OPCODE_NOP;
ir->coordinate->accept(this);
coord = this->result;
/* Put our coords in a temp. We'll need to modify them for shadow,
* projection, or LOD, so the only case we'd use it as is is if
* we're doing plain old texturing. Mesa IR optimization should
* handle cleaning up our mess in that case.
*/
coord = get_temp(glsl_type::vec4_type);
coord_dst = ir_to_mesa_dst_reg_from_src(coord);
ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst,
this->result);
if (ir->projector) {
ir->projector->accept(this);
@@ -1307,36 +1317,17 @@ ir_to_mesa_visitor::visit(ir_texture *ir)
switch (ir->op) {
case ir_tex:
if (ir->projector) {
/* Compute new coord as vec4(texcoord.xyz, projector) */
ir_to_mesa_emit_op1(ir, OPCODE_MOV, result_dst, coord);
result_dst.writemask = WRITEMASK_W;
ir_to_mesa_emit_op1(ir, OPCODE_MOV, result_dst, projector);
result_dst.writemask = WRITEMASK_XYZW;
inst = ir_to_mesa_emit_op1(ir, OPCODE_TXP, result_dst, result_src);
} else {
inst = ir_to_mesa_emit_op1(ir, OPCODE_TEX, result_dst, coord);
}
opcode = OPCODE_TEX;
break;
case ir_txb:
/* Mesa IR stores bias in the last channel of the coords. */
lod_info = ir_to_mesa_dst_reg_from_src(coord);
lod_info.writemask = WRITEMASK_W;
opcode = OPCODE_TXB;
ir->lod_info.bias->accept(this);
ir_to_mesa_emit_op1(ir, OPCODE_MOV, lod_info, this->result);
inst = ir_to_mesa_emit_op1(ir, OPCODE_TXB, result_dst, coord);
assert(!ir->projector); /* FINISHME */
lod_info = this->result;
break;
case ir_txl:
/* Mesa IR stores lod in the last channel of the coords. */
lod_info = ir_to_mesa_dst_reg_from_src(coord);
lod_info.writemask = WRITEMASK_W;
opcode = OPCODE_TXL;
ir->lod_info.lod->accept(this);
ir_to_mesa_emit_op1(ir, OPCODE_MOV, lod_info, this->result);
inst = ir_to_mesa_emit_op1(ir, OPCODE_TXL, result_dst, coord);
assert(!ir->projector); /* FINISHME */
lod_info = this->result;
break;
case ir_txd:
case ir_txf:
@@ -1344,6 +1335,41 @@ ir_to_mesa_visitor::visit(ir_texture *ir)
break;
}
if (ir->projector) {
if (opcode == OPCODE_TEX) {
/* Slot the projector in as the last component of the coord. */
coord_dst.writemask = WRITEMASK_W;
ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst, projector);
coord_dst.writemask = WRITEMASK_XYZW;
opcode = OPCODE_TXP;
} else {
ir_to_mesa_src_reg coord_w = coord;
coord_w.swizzle = SWIZZLE_WWWW;
/* For the other TEX opcodes there's no projective version
* since the last slot is taken up by lod info. Do the
* projective divide now.
*/
coord_dst.writemask = WRITEMASK_W;
ir_to_mesa_emit_op1(ir, OPCODE_RCP, coord_dst, projector);
coord_dst.writemask = WRITEMASK_XYZ;
ir_to_mesa_emit_op2(ir, OPCODE_MUL, coord_dst, coord, coord_w);
coord_dst.writemask = WRITEMASK_XYZW;
coord.swizzle = SWIZZLE_XYZW;
}
}
if (opcode == OPCODE_TXL || opcode == OPCODE_TXB) {
/* Mesa IR stores lod or lod bias in the last channel of the coords. */
coord_dst.writemask = WRITEMASK_W;
ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst, lod_info);
coord_dst.writemask = WRITEMASK_XYZW;
}
inst = ir_to_mesa_emit_op1(ir, opcode, result_dst, coord);
ir_dereference_variable *sampler = ir->sampler->as_dereference_variable();
assert(sampler); /* FINISHME: sampler arrays */
/* generate the mapping, remove when we generate storage at