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- /* Copyright (C) 1993, 1995, 1996, 1997 Aladdin Enterprises. All rights reserved.
-
- This file is part of Aladdin Ghostscript.
-
- Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- or distributor accepts any responsibility for the consequences of using it,
- or for whether it serves any particular purpose or works at all, unless he
- or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- License (the "License") for full details.
-
- Every copy of Aladdin Ghostscript must include a copy of the License,
- normally in a plain ASCII text file named PUBLIC. The License grants you
- the right to copy, modify and redistribute Aladdin Ghostscript, but only
- under certain conditions described in the License. Among other things, the
- License requires that the copyright notice and this notice be preserved on
- all copies.
- */
-
- /* zmedia.c */
- /* Media matching for setpagedevice */
- #include "math_.h"
- #include "memory_.h"
- #include "ghost.h"
- #include "gsmatrix.h"
- #include "errors.h"
- #include "oper.h"
- #include "idict.h"
- #include "idparam.h"
- #include "iname.h"
- #include "store.h"
-
- /* <pagedict> <attrdict> <policydict> <keys> .matchmedia <key> true */
- /* <pagedict> <attrdict> <policydict> <keys> .matchmedia false */
- /* <pagedict> null <policydict> <keys> .matchmedia null true */
- private int zmatch_page_size(P8(const ref *pvreq, const ref *pvmed,
- int policy, int orient, bool roll, float *best_mismatch, gs_matrix *pmat,
- gs_point *pmsize));
- private int
- zmatchmedia(register os_ptr op)
- { os_ptr preq = op - 3;
- os_ptr pattr = op - 2;
- os_ptr ppol = op - 1;
- #define pkeys op
- int policy_default;
- float best_mismatch = (float)max_long; /* adhoc */
- ref mmkey, nmkey;
- float mbest = best_mismatch;
- uint matched_priority;
- ref no_priority;
- ref *ppriority;
- int mepos, orient;
- bool roll;
- int code;
- int ai;
- ref aelt[2];
- #define mkey aelt[0]
- #define mdict aelt[1]
-
- if ( r_has_type(pattr, t_null) )
- { check_op(4);
- make_null(op - 3);
- make_true(op - 2);
- pop(2);
- return 0;
- }
- check_type(*preq, t_dictionary);
- check_dict_read(*preq);
- check_type(*pattr, t_dictionary);
- check_dict_read(*pattr);
- check_type(*ppol, t_dictionary);
- check_dict_read(*ppol);
- check_array(*pkeys);
- check_read(*pkeys);
- switch ( code = dict_int_null_param(preq, "MediaPosition", 0, 0x7fff,
- 0, &mepos) )
- {
- default: return code;
- case 2:
- case 1: mepos = -1;
- case 0: ;
- }
- switch ( code = dict_int_null_param(preq, "Orientation", 0, 3,
- 0, &orient) )
- {
- default: return code;
- case 2:
- case 1: orient = -1;
- case 0: ;
- }
- code = dict_bool_param(preq, "RollFedMedia", false, &roll);
- if ( code < 0 )
- return code;
- code = dict_int_param(ppol, "PolicyNotFound", 0, 7, 0,
- &policy_default);
- if ( code < 0 )
- return code;
- if ( dict_find_string(pattr, "Priority", &ppriority) > 0 )
- { check_array_only(*ppriority);
- check_read(*ppriority);
- }
- else
- { make_empty_array(&no_priority, a_readonly);
- ppriority = &no_priority;
- }
- #define reset_match()\
- matched_priority = r_size(ppriority),\
- make_null(&mmkey),\
- make_null(&nmkey)
- reset_match();
- for ( ai = dict_first(pattr); (ai = dict_next(pattr, ai, aelt)) >= 0; )
- { if ( r_has_type(&mdict, t_dictionary) &&
- r_has_attr(dict_access_ref(&mdict), a_read) &&
- r_has_type(&mkey, t_integer) &&
- (mepos < 0 || mkey.value.intval == mepos)
- )
- { bool match_all;
- uint ki, pi;
-
- code = dict_bool_param(&mdict, "MatchAll", false,
- &match_all);
- if ( code < 0 )
- return code;
- for ( ki = 0; ki < r_size(pkeys); ki++ )
- { ref key;
- ref kstr;
- ref *prvalue;
- ref *pmvalue;
- ref *ppvalue;
- int policy;
-
- array_get(pkeys, ki, &key);
- if ( dict_find(&mdict, &key, &pmvalue) <= 0 )
- continue;
- if ( dict_find(preq, &key, &prvalue) <= 0 ||
- r_has_type(prvalue, t_null)
- )
- { if ( match_all )
- goto no;
- else
- continue;
- }
- /* Look for the Policies entry for this key. */
- if ( dict_find(ppol, &key, &ppvalue) > 0 )
- { check_type_only(*ppvalue, t_integer);
- policy = ppvalue->value.intval;
- }
- else
- policy = policy_default;
- /*
- * Match a requested attribute value with the attribute value in the
- * description of a medium. For all attributes except PageSize,
- * matching means equality. PageSize is special; see match_page_size
- * below.
- */
- if ( r_has_type(&key, t_name) &&
- (name_string_ref(&key, &kstr),
- r_size(&kstr) == 8 &&
- !memcmp(kstr.value.bytes, "PageSize", 8))
- )
- { gs_matrix ignore_mat;
- gs_point ignore_msize;
- if ( zmatch_page_size(prvalue, pmvalue,
- policy, orient, roll,
- &best_mismatch,
- &ignore_mat,
- &ignore_msize)
- <= 0 )
- goto no;
- }
- else
- if ( !obj_eq(prvalue, pmvalue) )
- goto no;
- }
- /* We have a match. If it is a better match */
- /* than the current best one, it supersedes it */
- /* regardless of priority. */
- if ( best_mismatch < mbest )
- { mbest = best_mismatch;
- reset_match();
- }
- /* In case of a tie, see if the new match has */
- /* priority. */
- for ( pi = matched_priority; pi > 0; )
- { ref pri;
- pi--;
- array_get(ppriority, pi, &pri);
- if ( obj_eq(&mkey, &pri) )
- { /* Yes, higher priority. */
- mmkey = mkey;
- matched_priority = pi;
- break;
- }
- }
- /* Save the match in case no match has priority. */
- nmkey = mkey;
- no: ;
- }
- }
- #undef mkey
- #undef mdict
- #undef pkeys
- if ( r_has_type(&nmkey, t_null) )
- { make_false(op - 3);
- pop(3);
- }
- else
- { if ( r_has_type(&mmkey, t_null) )
- op[-3] = nmkey;
- else
- op[-3] = mmkey;
- make_true(op - 2);
- pop(2);
- }
- return 0;
- }
-
- /* [<req_x> <req_y>] [<med_x0> <med_y0> (<med_x1> <med_y1> | )]
- * <policy> <orient|null> <roll> <matrix|null> .matchpagesize
- * <matrix|null> <med_x> <med_y> true -or- false
- */
- private int
- zmatchpagesize(register os_ptr op)
- { gs_matrix mat;
- float ignore_mismatch = (float)max_long;
- gs_point media_size;
- int orient;
- bool roll;
- int code;
-
- check_type(op[-3], t_integer);
- if ( r_has_type(op - 2, t_null) )
- orient = -1;
- else
- { check_int_leu(op[-2], 3);
- orient = (int)op[-2].value.intval;
- }
- check_type(op[-1], t_boolean);
- roll = op[-1].value.boolval;
- code = zmatch_page_size(op - 5, op - 4, (int)op[-3].value.intval,
- orient, roll,
- &ignore_mismatch, &mat, &media_size);
- switch ( code )
- {
- default:
- return code;
- case 0:
- make_false(op - 5);
- pop(5);
- break;
- case 1:
- code = write_matrix(op, &mat);
- if ( code < 0 && !r_has_type(op, t_null) )
- return code;
- op[-5] = *op;
- make_real(op - 4, media_size.x);
- make_real(op - 3, media_size.y);
- make_true(op - 2);
- pop(2);
- break;
- }
- return 0;
- }
- /* Match the PageSize. See below for details. */
- private bool match_page_size(P8(const gs_point *request,
- const gs_rect *medium, int policy, int orient, bool roll,
- float *best_mismatch, gs_matrix *pmat, gs_point *pmsize));
- private int
- zmatch_page_size(const ref *pvreq, const ref *pvmed, int policy, int orient,
- bool roll, float *best_mismatch, gs_matrix *pmat, gs_point *pmsize)
- { uint nm;
- check_array(*pvreq);
- check_array(*pvmed);
- if ( !(r_size(pvreq) == 2 && ((nm = r_size(pvmed)) == 2 || nm == 4)) )
- return_error(e_rangecheck);
- { ref rv[6];
- uint i;
- float v[6];
- int code;
-
- array_get(pvreq, 0, &rv[0]);
- array_get(pvreq, 1, &rv[1]);
- for ( i = 0; i < 4; ++i )
- array_get(pvmed, i % nm, &rv[i + 2]);
- if ( (code = num_params(rv + 5, 6, v)) < 0 )
- return code;
- { gs_point request;
- gs_rect medium;
-
- request.x = v[0], request.y = v[1];
- medium.p.x = v[2], medium.p.y = v[3],
- medium.q.x = v[4], medium.q.y = v[5];
- return match_page_size(&request, &medium, policy, orient,
- roll, best_mismatch, pmat, pmsize);
- }
- }
- }
- /*
- * Match a requested PageSize with the PageSize of a medium. The medium
- * may specify either a single value [mx my] or a range
- * [mxmin mymin mxmax mymax]; matching means equality or inclusion
- * to within a tolerance of 5, possibly swapping the requested X and Y.
- * Take the Policies value into account, keeping track of the discrepancy
- * if needed. When a match is found, also return the matrix to be
- * concatenated after setting up the default matrix, and the actual
- * media size.
- *
- * NOTE: The algorithm here doesn't work properly for variable-size media
- * when the match isn't exact. We'll fix it if we ever need to.
- */
- private void make_adjustment_matrix(P5(const gs_point *request,
- const gs_rect *medium, gs_matrix *pmat, bool scale, int rotate));
- private bool
- match_page_size(const gs_point *request, const gs_rect *medium, int policy,
- int orient, bool roll, float *best_mismatch, gs_matrix *pmat,
- gs_point *pmsize)
- { double rx = request->x, ry = request->y;
-
- if ( policy == 7 )
- { /* (Adobe) hack: just impose requested values */
- *best_mismatch = 0;
- gs_make_identity(pmat);
- *pmsize = *request;
- return true;
- }
- if ( rx - medium->p.x >= -5 && rx - medium->q.x <= 5 &&
- ry - medium->p.y >= -5 && ry - medium->q.y <= 5 &&
- (orient < 0 || !(orient & 1))
- )
- { *best_mismatch = 0;
- make_adjustment_matrix(request, medium, pmat, false,
- (orient >= 0 ? orient : 0));
- }
- else if ( rx - medium->p.y >= -5 && rx - medium->q.y <= 5 &&
- ry - medium->p.x >= -5 && ry - medium->q.x <= 5 &&
- (orient < 0 || (orient & 1))
- )
- { *best_mismatch = 0;
- make_adjustment_matrix(request, medium, pmat, false,
- (orient >= 0 ? orient :
- rx < ry ? -1 : 1));
- }
- else
- { int rotate =
- (orient >= 0 ? orient :
- rx < ry ?
- (medium->q.x > medium->q.y ? -1 : 0) :
- (medium->q.x < medium->q.y ? 1 : 0));
- bool larger =
- (rotate ? medium->q.y >= rx && medium->q.x >= ry :
- medium->q.x >= rx && medium->q.y >= ry);
- bool adjust = false;
- float mismatch = medium->q.x * medium->q.y - rx * ry;
-
- switch ( policy )
- {
- default: /* exact match only */
- return false;
- case 3: /* nearest match, adjust */
- adjust = true;
- case 5: /* nearest match, don't adjust */
- if ( fabs(mismatch) >= fabs(*best_mismatch) )
- return false;
- break;
- case 4: /* next larger match, adjust */
- adjust = true;
- case 6: /* next larger match, don't adjust */
- if ( !larger || mismatch >= *best_mismatch )
- return false;
- break;
- }
- if ( adjust )
- make_adjustment_matrix(request, medium, pmat, !larger, rotate);
- else
- { gs_rect req_rect;
- req_rect.p = *request;
- req_rect.q = *request;
- make_adjustment_matrix(request, &req_rect, pmat, false, rotate);
- }
- *best_mismatch = mismatch;
- }
- if ( pmat->xx == 0 )
- { /* Swap request X and Y. */
- double temp = rx;
- rx = ry, ry = temp;
- }
- #define adjust_into(req, mmin, mmax)\
- (req < mmin ? mmin : req > mmax ? mmax : req)
- pmsize->x = adjust_into(rx, medium->p.x, medium->q.x);
- pmsize->y = adjust_into(ry, medium->p.y, medium->q.y);
- return true;
- }
- /*
- * Compute the adjustment matrix for scaling and/or rotating the page
- * to match the medium. If the medium is completely flexible in a given
- * dimension (e.g., roll media in one dimension, or displays in both),
- * we must adjust its size in that dimension to match the request.
- * We recognize this by medium->p.{x,y} = 0.
- */
- private void
- make_adjustment_matrix(const gs_point *request, const gs_rect *medium,
- gs_matrix *pmat, bool scale, int rotate)
- { double rx = request->x, ry = request->y;
- double mx = medium->q.x, my = medium->q.y;
-
- /* Rotate the request if necessary. */
- if ( rotate & 1 )
- { double temp = rx;
- rx = ry, ry = temp;
- }
-
- /* Adjust the medium size if flexible. */
- if ( medium->p.x == 0 && mx > rx )
- mx = rx;
- if ( medium->p.y == 0 && my > ry )
- my = ry;
-
- /* Translate to align the centers. */
- gs_make_translation(mx / 2, my / 2, pmat);
-
- /* Rotate if needed. */
- if ( rotate )
- gs_matrix_rotate(pmat, 90.0 * rotate, pmat);
-
- /* Scale if needed. */
- if ( scale )
- { double xfactor = mx / rx;
- double yfactor = my / ry;
- double factor = min(xfactor, yfactor);
- if ( factor < 1 )
- gs_matrix_scale(pmat, factor, factor, pmat);
- }
-
- /* Now translate the origin back, */
- /* using the original, unswapped request. */
- gs_matrix_translate(pmat, -request->x / 2, -request->y / 2, pmat);
- }
-
- /* ------ Initialization procedure ------ */
-
- BEGIN_OP_DEFS(zmedia2_l2_op_defs) {
- op_def_begin_level2(),
- {"4.matchmedia", zmatchmedia},
- {"6.matchpagesize", zmatchpagesize},
- END_OP_DEFS(0) }
-