/* Copyright (C) 1989, 1991 Aladdin Enterprises. All rights reserved.
Distributed by Free Software Foundation, Inc.
This file is part of Ghostscript.
Ghostscript is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
to anyone for the consequences of using it or for whether it serves any
particular purpose or works at all, unless he says so in writing. Refer
to the Ghostscript General Public License for full details.
Everyone is granted permission to copy, modify and redistribute
Ghostscript, but only under the conditions described in the Ghostscript
General Public License. A copy of this license is supposed to have been
given to you along with Ghostscript so you can know your rights and
responsibilities. It should be in a file named COPYING. Among other
things, the copyright notice and this notice must be preserved on all
/* Matrix operators for Ghostscript */
private int near
common_transform(P3(os_ptr
,
int (*)(P4(gs_state
*, floatp
, floatp
, gs_point
*)),
int (*)(P4(floatp
, floatp
, const gs_matrix
*, gs_point
*))));
/* Initialize the type and attributes of the identity matrix. */
/* We may have to do this after each save and restore, */
/* in order to get the l_new attribute correct. */
{ extern gs_matrix gs_identity_matrix
;
ref
*mp
= (ref
*)&gs_identity_matrix
;
int attrs
= alloc_save_new_mask
;
for ( i
= 0; i
< 6; i
++, mp
++ )
r_set_type_attrs(mp
, t_real
, attrs
);
zcurrentmatrix(register os_ptr op
)
{ int code
= write_matrix(op
);
if ( code
< 0 ) return code
;
gs_currentmatrix(igs
, (gs_matrix
*)(op
->value
.refs
));
zsetmatrix(register os_ptr op
)
int code
= read_matrix(op
, &mat
);
if ( code
< 0 ) return code
;
if ( (code
= gs_setmatrix(igs
, &mat
)) < 0 ) return code
;
ztranslate(register os_ptr op
)
{ int code
= write_matrix(op
);
if ( code
< 0 ) /* no matrix operand */
{ if ( (code
= num_params(op
, 2, trans
)) < 0 ) return code
;
code
= gs_translate(igs
, trans
[0], trans
[1]);
else /* matrix operand */
{ gs_matrix
*pmat
= (gs_matrix
*)op
->value
.refs
;
if ( (code
= num_params(op
- 1, 2, trans
)) < 0 ) return code
;
code
= gs_make_translation(trans
[0], trans
[1], pmat
);
zscale(register os_ptr op
)
int code
= write_matrix(op
);
if ( code
< 0 ) /* no matrix operand */
{ if ( (code
= num_params(op
, 2, scale
)) < 0 ) return code
;
code
= gs_scale(igs
, scale
[0], scale
[1]);
else /* matrix operand */
{ gs_matrix
*pmat
= (gs_matrix
*)op
->value
.refs
;
if ( (code
= num_params(op
- 1, 2, scale
)) < 0 ) return code
;
code
= gs_make_scaling(scale
[0], scale
[1], pmat
);
zrotate(register os_ptr op
)
{ int code
= write_matrix(op
);
if ( code
< 0 ) /* no matrix operand */
{ if ( (code
= num_params(op
, 1, &ang
)) < 0 ) return code
;
code
= gs_rotate(igs
, ang
);
else /* matrix operand */
{ gs_matrix
*pmat
= (gs_matrix
*)op
->value
.refs
;
if ( (code
= num_params(op
- 1, 1, &ang
)) < 0 ) return code
;
code
= gs_make_rotation(ang
, pmat
);
zconcat(register os_ptr op
)
int code
= read_matrix(op
, &mat
);
if ( code
< 0 ) return code
;
code
= gs_concat(igs
, &mat
);
if ( code
< 0 ) return code
;
zconcatmatrix(register os_ptr op
)
if ( (code
= read_matrix(op
- 2, &m1
)) < 0 ||
(code
= read_matrix(op
- 1, &m2
)) < 0 ||
(code
= write_matrix(op
)) < 0 ||
(code
= gs_matrix_multiply(&m1
, &m2
, (gs_matrix
*)(op
->value
.refs
))) < 0
ztransform(register os_ptr op
)
{ return common_transform(op
, gs_transform
, gs_point_transform
);
zdtransform(register os_ptr op
)
{ return common_transform(op
, gs_dtransform
, gs_distance_transform
);
zitransform(register os_ptr op
)
{ return common_transform(op
, gs_itransform
, gs_point_transform_inverse
);
zidtransform(register os_ptr op
)
{ return common_transform(op
, gs_idtransform
, gs_distance_transform_inverse
);
/* Common logic for [i][d]transform */
common_transform(register os_ptr op
,
int (*ptproc
)(P4(gs_state
*, floatp
, floatp
, gs_point
*)),
int (*matproc
)(P4(floatp
, floatp
, const gs_matrix
*, gs_point
*)))
/* Optimize for the non-matrix case */
case t_real
: opxy
[1] = op
->value
.realval
; break;
case t_integer
: opxy
[1] = op
->value
.intval
; break;
case t_array
: /* might be a matrix */
if ( (code
= read_matrix(op
, pmat
)) < 0 ||
(code
= num_params(op
- 1, 2, opxy
)) < 0 ||
(code
= (*matproc
)(opxy
[0], opxy
[1], pmat
, &pt
)) < 0
default: return e_typecheck
;
switch ( r_type(op
- 1) )
case t_real
: opxy
[0] = (op
- 1)->value
.realval
; break;
case t_integer
: opxy
[0] = (op
- 1)->value
.intval
; break;
default: return e_typecheck
;
if ( (code
= (*ptproc
)(igs
, opxy
[0], opxy
[1], &pt
)) < 0 )
out
: make_real(op
- 1, pt
.x
);
zinvertmatrix(register os_ptr op
)
if ( (code
= read_matrix(op
- 1, &m
)) < 0 ||
(code
= write_matrix(op
)) < 0 ||
(code
= gs_matrix_invert(&m
, (gs_matrix
*)op
->value
.refs
)) < 0
/* ------ Initialization procedure ------ */
op_def zmatrix_op_defs
[] = {
{"2dtransform", zdtransform
},
{"3concatmatrix", zconcatmatrix
},
{"1currentmatrix", zcurrentmatrix
},
{"2idtransform", zidtransform
},
{"2invertmatrix", zinvertmatrix
},
{"2itransform", zitransform
},
{"1setmatrix", zsetmatrix
},
{"2transform", ztransform
},
{"2translate", ztranslate
},
op_def_end(init_identity_matrix
)