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i965/fs: Refactor interpolation code to prepare for adding centroid support.

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Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Paul Berry 2012-06-21 11:33:22 -07:00
parent 6d7ebb21f8
commit cf0e7aa9f8
2 changed files with 17 additions and 8 deletions
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23
src/mesa/drivers/dri/i965/brw_fs.cpp
View file

@ -419,6 +419,20 @@ fs_visitor::emit_fragcoord_interpolation(ir_variable *ir)
return reg;
}
fs_inst *
fs_visitor::emit_linterp(const fs_reg &attr, const fs_reg &interp,
glsl_interp_qualifier interpolation_mode)
{
brw_wm_barycentric_interp_mode barycoord_mode;
if (interpolation_mode == INTERP_QUALIFIER_SMOOTH)
barycoord_mode = BRW_WM_PERSPECTIVE_PIXEL_BARYCENTRIC;
else
barycoord_mode = BRW_WM_NONPERSPECTIVE_PIXEL_BARYCENTRIC;
return emit(FS_OPCODE_LINTERP, attr,
this->delta_x[barycoord_mode],
this->delta_y[barycoord_mode], interp);
}
fs_reg *
fs_visitor::emit_general_interpolation(ir_variable *ir)
{
@ -482,14 +496,7 @@ fs_visitor::emit_general_interpolation(ir_variable *ir)
emit(BRW_OPCODE_MOV, attr, fs_reg(1.0f));
} else {
struct brw_reg interp = interp_reg(location, k);
brw_wm_barycentric_interp_mode barycoord_mode;
if (interpolation_mode == INTERP_QUALIFIER_SMOOTH)
barycoord_mode = BRW_WM_PERSPECTIVE_PIXEL_BARYCENTRIC;
else
barycoord_mode = BRW_WM_NONPERSPECTIVE_PIXEL_BARYCENTRIC;
emit(FS_OPCODE_LINTERP, attr,
this->delta_x[barycoord_mode],
this->delta_y[barycoord_mode], fs_reg(interp));
emit_linterp(attr, fs_reg(interp), interpolation_mode);
if (intel->gen < 6) {
emit(BRW_OPCODE_MUL, attr, attr, this->pixel_w);
}

2
src/mesa/drivers/dri/i965/brw_fs.h
View file

@ -542,6 +542,8 @@ public:
void emit_dummy_fs();
fs_reg *emit_fragcoord_interpolation(ir_variable *ir);
fs_inst *emit_linterp(const fs_reg &attr, const fs_reg &interp,
glsl_interp_qualifier interpolation_mode);
fs_reg *emit_frontfacing_interpolation(ir_variable *ir);
fs_reg *emit_general_interpolation(ir_variable *ir);
void emit_interpolation_setup_gen4();