static struct ureg get_eye_normal( struct tnl_program *p )
{
if (is_undef(p->eye_normal)) {
struct ureg normal = register_input(p, VERT_ATTRIB_NORMAL );
struct ureg mvinv[3];
register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 2,
STATE_MATRIX_INVTRANS, mvinv );
p->eye_normal = reserve_temp(p);
/* Transform to eye space:
*/
emit_matrix_transform_vec3( p, p->eye_normal, mvinv, normal );
/* Normalize/Rescale:
*/
if (p->state->normalize) {
emit_normalize_vec3( p, p->eye_normal, p->eye_normal );
}
else if (p->state->rescale_normals) {
struct ureg rescale = register_param2(p, STATE_INTERNAL,
STATE_NORMAL_SCALE);
emit_op2( p, OPCODE_MUL, p->eye_normal, 0, p->eye_normal,
swizzle1(rescale, X));
}
}
return p->eye_normal;
}
static struct ureg get_eye_position_normalized( struct tnl_program *p )
{
if (is_undef(p->eye_position_normalized)) {
struct ureg eye = get_eye_position(p);
p->eye_position_normalized = reserve_temp(p);
emit_normalize_vec3(p, p->eye_position_normalized, eye);
}
return p->eye_position_normalized;
}
static struct ureg get_transformed_normal( struct tnl_program *p )
{
if (is_undef(p->transformed_normal) &&
!p->state->need_eye_coords &&
!p->state->normalize &&
!(p->state->need_eye_coords == p->state->rescale_normals))
{
p->transformed_normal = register_input(p, VERT_ATTRIB_NORMAL );
}
else if (is_undef(p->transformed_normal))
{
struct ureg normal = register_input(p, VERT_ATTRIB_NORMAL );
struct ureg mvinv[3];
struct ureg transformed_normal = reserve_temp(p);
if (p->state->need_eye_coords) {
register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 2,
STATE_MATRIX_INVTRANS, mvinv );
/* Transform to eye space:
*/
emit_matrix_transform_vec3( p, transformed_normal, mvinv, normal );
normal = transformed_normal;
}
/* Normalize/Rescale:
*/
if (p->state->normalize) {
emit_normalize_vec3( p, transformed_normal, normal );
normal = transformed_normal;
}
else if (p->state->need_eye_coords == p->state->rescale_normals) {
/* This is already adjusted for eye/non-eye rendering:
*/
struct ureg rescale = register_param2(p, STATE_INTERNAL,
STATE_NORMAL_SCALE);
emit_op2( p, OPCODE_MUL, transformed_normal, 0, normal, rescale );
normal = transformed_normal;
}
assert(normal.file == PROGRAM_TEMPORARY);
p->transformed_normal = normal;
}
return p->transformed_normal;
}
static struct ureg get_eye_position_z( struct tnl_program *p )
{
if (!is_undef(p->eye_position))
return swizzle1(p->eye_position, Z);
if (is_undef(p->eye_position_z)) {
struct ureg pos = register_input( p, VERT_ATTRIB_POS );
struct ureg modelview[4];
p->eye_position_z = reserve_temp(p);
register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
0, modelview );
emit_op2(p, OPCODE_DP4, p->eye_position_z, 0, pos, modelview[2]);
}
return p->eye_position_z;
}
static struct ureg get_eye_z( struct tnl_program *p )
{
if (!is_undef(p->eye_position)) {
return swizzle1(p->eye_position, Z);
}
else if (!is_undef(p->eye_z)) {
struct ureg pos = register_input( p, BRW_ATTRIB_POS );
struct ureg modelview2;
p->eye_z = reserve_temp(p);
register_matrix_param6( p, STATE_MATRIX, STATE_MODELVIEW, 0, 2, 1,
STATE_MATRIX, &modelview2 );
emit_matrix_transform_vec4(p, p->eye_position, modelview, pos);
emit_op2(p, OPCODE_DP4, p->eye_z, WRITEMASK_Z, pos, modelview2);
}
return swizzle1(p->eye_z, Z)
}
static struct ureg get_eye_position( struct tnl_program *p )
{
if (is_undef(p->eye_position)) {
struct ureg pos = register_input( p, VERT_ATTRIB_POS );
struct ureg modelview[4];
p->eye_position = reserve_temp(p);
if (p->mvp_with_dp4) {
register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
0, modelview );
emit_matrix_transform_vec4(p, p->eye_position, modelview, pos);
}
else {
register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
STATE_MATRIX_TRANSPOSE, modelview );
emit_transpose_matrix_transform_vec4(p, p->eye_position, modelview, pos);
}
}
return p->eye_position;
}
