* inversion/identity, or the other way around if we're drawing to an FBO.
*/
if (invert) {
- /* MAD wpos_temp.y, wpos_input, wpostrans.xxxx, wpostrans.yyyy
- */
- wpos_temp_y = nir_ffma(b,
- nir_channel(b, wpos_temp, 1),
- nir_channel(b, wpostrans, 0),
- nir_channel(b, wpostrans, 1));
+ /* wpos_temp.y = wpos_input * wpostrans.xxxx + wpostrans.yyyy */
+ wpos_temp_y = nir_fadd(b, nir_fmul(b, nir_channel(b, wpos_temp, 1),
+ nir_channel(b, wpostrans, 0)),
+ nir_channel(b, wpostrans, 1));
} else {
- /* MAD wpos_temp.y, wpos_input, wpostrans.zzzz, wpostrans.wwww
- */
- wpos_temp_y = nir_ffma(b,
- nir_channel(b, wpos_temp, 1),
- nir_channel(b, wpostrans, 2),
- nir_channel(b, wpostrans, 3));
+ /* wpos_temp.y = wpos_input * wpostrans.zzzz + wpostrans.wwww */
+ wpos_temp_y = nir_fadd(b, nir_fmul(b, nir_channel(b, wpos_temp, 1),
+ nir_channel(b, wpostrans, 2)),
+ nir_channel(b, wpostrans, 3));
}
wpos_temp = nir_vec4(b,
*
* The bias of the y-coordinate depends on whether y-inversion takes place
* (adjY[1]) or not (adjY[0]), which is in turn dependent on whether we are
- * drawing to an FBO (causes additional inversion), and whether the the pipe
+ * drawing to an FBO (causes additional inversion), and whether the pipe
* driver origin and the requested origin differ (the latter condition is
* stored in the 'invert' variable).
*
flip_y)));
}
-static bool
+static void
+lower_load_sample_pos(lower_wpos_ytransform_state *state,
+ nir_intrinsic_instr *intr)
+{
+ nir_builder *b = &state->b;
+ b->cursor = nir_after_instr(&intr->instr);
+
+ nir_ssa_def *pos = &intr->dest.ssa;
+ nir_ssa_def *scale = nir_channel(b, get_transform(state), 0);
+ nir_ssa_def *neg_scale = nir_channel(b, get_transform(state), 2);
+ /* Either y or 1-y for scale equal to 1 or -1 respectively. */
+ nir_ssa_def *flipped_y =
+ nir_fadd(b, nir_fmax(b, neg_scale, nir_imm_float(b, 0.0)),
+ nir_fmul(b, nir_channel(b, pos, 1), scale));
+ nir_ssa_def *flipped_pos = nir_vec2(b, nir_channel(b, pos, 0), flipped_y);
+
+ nir_ssa_def_rewrite_uses_after(&intr->dest.ssa, nir_src_for_ssa(flipped_pos),
+ flipped_pos->parent_instr);
+}
+
+static void
lower_wpos_ytransform_block(lower_wpos_ytransform_state *state, nir_block *block)
{
nir_foreach_instr_safe(instr, block) {
if (var->data.mode == nir_var_shader_in &&
var->data.location == VARYING_SLOT_POS) {
- /* gl_FragCoord should not have array/struct deref's: */
+ /* gl_FragCoord should not have array/struct derefs: */
assert(dvar->deref.child == NULL);
lower_fragcoord(state, intr);
+ } else if (var->data.mode == nir_var_system_value &&
+ var->data.location == SYSTEM_VALUE_SAMPLE_POS) {
+ assert(dvar->deref.child == NULL);
+ lower_load_sample_pos(state, intr);
}
} else if (intr->intrinsic == nir_intrinsic_interp_var_at_offset) {
lower_interp_var_at_offset(state, intr);
}
} else if (instr->type == nir_instr_type_alu) {
nir_alu_instr *alu = nir_instr_as_alu(instr);
- if (alu->op == nir_op_fddy)
+ if (alu->op == nir_op_fddy ||
+ alu->op == nir_op_fddy_fine ||
+ alu->op == nir_op_fddy_coarse)
lower_fddy(state, alu);
}
}
-
- return true;
}
static void