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- /* Copyright (C) 1992, 2000 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL 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 Free Public License (the
- "License") for full details.
-
- Every copy of AFPL 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 AFPL 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.
- */
-
- /*$Id: zcolor2.c,v 1.3 2000/09/19 19:00:53 lpd Exp $ */
- /* Level 2 color operators */
- #include "ghost.h"
- #include "oper.h"
- #include "gscolor.h"
- #include "gscssub.h"
- #include "gsmatrix.h"
- #include "gsstruct.h"
- #include "gxcspace.h"
- #include "gxfixed.h" /* for gxcolor2.h */
- #include "gxcolor2.h"
- #include "gxdcolor.h" /* for gxpcolor.h */
- #include "gxdevice.h"
- #include "gxdevmem.h" /* for gxpcolor.h */
- #include "gxpcolor.h"
- #include "estack.h"
- #include "ialloc.h"
- #include "istruct.h"
- #include "idict.h"
- #include "idparam.h"
- #include "igstate.h"
- #include "store.h"
-
- /* Forward references */
- private int store_color_params(P3(os_ptr, const gs_paint_color *,
- const gs_color_space *));
- private int load_color_params(P3(os_ptr, gs_paint_color *,
- const gs_color_space *));
-
- /* Test whether a Pattern instance uses a base space. */
- inline private bool
- pattern_instance_uses_base_space(const gs_pattern_instance_t *pinst)
- {
- return pinst->type->procs.uses_base_space(pinst->type->procs.get_pattern(pinst));
- }
-
- /* - currentcolor <param1> ... <paramN> */
- private int
- zcurrentcolor(i_ctx_t *i_ctx_p)
- {
- os_ptr op = osp;
- const gs_client_color *pc = gs_currentcolor(igs);
- const gs_color_space *pcs = gs_currentcolorspace(igs);
- int n;
-
- check_ostack(5); /* Worst case: CMYK + pattern */
- if (pcs->type->index == gs_color_space_index_Pattern) {
- gs_pattern_instance_t *pinst = pc->pattern;
-
- n = 1;
- if (pinst != 0 && pattern_instance_uses_base_space(pinst)) /* uncolored */
- n += store_color_params(op, &pc->paint,
- (const gs_color_space *)&pcs->params.pattern.base_space);
- op[n] = istate->pattern;
- } else
- n = store_color_params(op, &pc->paint, pcs);
- push(n);
- return 0;
- }
-
- /* - .currentcolorspace <array|int> */
- private int
- zcurrentcolorspace(i_ctx_t *i_ctx_p)
- {
- os_ptr op = osp;
-
- push(1);
- *op = istate->colorspace.array;
- if (r_has_type(op, t_null)) {
- /*
- * Return the color space index. This is only possible
- * for the parameterless color spaces.
- */
- gs_color_space_index csi = gs_currentcolorspace_index(igs);
-
- make_int(op, (int)(csi));
- }
- return 0;
- }
-
- /* <param1> ... <paramN> setcolor - */
- private int
- zsetcolor(i_ctx_t *i_ctx_p)
- {
- os_ptr op = osp;
- gs_client_color c;
- const gs_color_space *pcs = gs_currentcolorspace(igs);
- int n, code;
- gs_pattern_instance_t *pinst = 0;
-
- if (pcs->type->index == gs_color_space_index_Pattern) {
- /* Make sure *op is a real Pattern. */
- ref *pImpl;
-
- if (r_has_type(op, t_null)) {
- c.pattern = 0;
- n = 1;
- } else {
- check_type(*op, t_dictionary);
- check_dict_read(*op);
- /*
- * We have no way to check for a subclass of st_pattern_instance,
- * so just make sure the structure is large enough.
- */
- if (dict_find_string(op, "Implementation", &pImpl) <= 0 ||
- !r_is_struct(pImpl) ||
- gs_object_size(imemory, r_ptr(pImpl, const void)) <
- sizeof(gs_pattern_instance_t)
- )
- return_error(e_rangecheck);
- pinst = r_ptr(pImpl, gs_pattern_instance_t);
- c.pattern = pinst;
- if (pattern_instance_uses_base_space(pinst)) { /* uncolored */
- if (!pcs->params.pattern.has_base_space)
- return_error(e_rangecheck);
- n = load_color_params(op - 1, &c.paint,
- (const gs_color_space *)&pcs->params.pattern.base_space);
- if (n < 0)
- return n;
- n++;
- } else
- n = 1;
- }
- } else {
- n = load_color_params(op, &c.paint, pcs);
- c.pattern = 0; /* for GC */
- }
- if (n < 0)
- return n;
- code = gs_setcolor(igs, &c);
- if (code < 0)
- return code;
- if (pinst != 0)
- istate->pattern = *op;
- pop(n);
- return code;
- }
-
- /* <array> .setcolorspace - */
- private int
- zsetcolorspace(i_ctx_t *i_ctx_p)
- {
- os_ptr op = osp;
-
- check_type(*op, t_array);
- istate->colorspace.array = *op;
- pop(1);
- return 0;
- }
-
- /* ------ Initialization procedure ------ */
-
- const op_def zcolor2_l2_op_defs[] =
- {
- op_def_begin_level2(),
- {"0currentcolor", zcurrentcolor},
- {"0.currentcolorspace", zcurrentcolorspace},
- {"1setcolor", zsetcolor},
- {"1.setcolorspace", zsetcolorspace},
- op_def_end(0)
- };
-
- /* ------ Internal procedures ------ */
-
- /* Store non-pattern color values on the operand stack. */
- /* Return the number of values stored. */
- private int
- store_color_params(os_ptr op, const gs_paint_color * pc,
- const gs_color_space * pcs)
- {
- int n = cs_num_components(pcs);
-
- if (pcs->type->index == gs_color_space_index_Indexed)
- make_int(op + 1, (int)pc->values[0]);
- else
- make_floats(op + 1, pc->values, n);
- return n;
- }
-
- /* Load non-pattern color values from the operand stack. */
- /* Return the number of values stored. */
- private int
- load_color_params(os_ptr op, gs_paint_color * pc, const gs_color_space * pcs)
- {
- int n = cs_num_components(pcs);
- int code = float_params(op, n, pc->values);
-
- if (code < 0)
- return code;
- return n;
- }
-