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- /* Copyright (C) 1999 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: gscssub.c,v 1.2 2000/09/19 19:00:27 lpd Exp $ */
- /* Color space substitution "operators" */
- #include "gx.h"
- #include "gserrors.h"
- #include "gscssub.h"
- #include "gxcspace.h" /* for st_color_space */
- #include "gxdevcli.h"
- #include "gzstate.h"
-
- /* .setsubstitutecolorspace */
- int
- gs_setsubstitutecolorspace(gs_state *pgs, gs_color_space_index csi,
- const gs_color_space *pcs)
- {
- int index = (int)csi;
- static const uint masks[3] = {
- (1 << gs_color_space_index_DeviceGray) |
- (1 << gs_color_space_index_CIEA),
- (1 << gs_color_space_index_DeviceRGB) |
- (1 << gs_color_space_index_CIEABC) |
- (1 << gs_color_space_index_CIEDEF),
- (1 << gs_color_space_index_DeviceCMYK) |
- (1 << gs_color_space_index_CIEDEFG)
- };
- const gs_color_space *pcs_old;
-
- if (index < 0 || index > 2)
- return_error(gs_error_rangecheck);
- if (pcs) {
- if (!masks[index] & (1 << gs_color_space_get_index(pcs)))
- return_error(gs_error_rangecheck);
- }
- pcs_old = pgs->device_color_spaces.indexed[index];
- if (pcs_old == 0) {
- gs_color_space *pcs_new;
-
- if (pcs == 0 || gs_color_space_get_index(pcs) == csi)
- return 0;
- pcs_new = gs_alloc_struct(pgs->memory, gs_color_space, &st_color_space,
- "gs_setsubstitutecolorspace");
- if (pcs_new == 0)
- return_error(gs_error_VMerror);
- gs_cspace_init_from(pcs_new, pcs);
- pgs->device_color_spaces.indexed[index] = pcs_new;
- } else {
- gs_cspace_assign(pgs->device_color_spaces.indexed[index],
- (pcs ? pcs :
- pgs->shared->device_color_spaces.indexed[index]));
- }
- return 0;
- }
-
- /* Possibly-substituted color space accessors. */
- const gs_color_space *
- gs_current_DeviceGray_space(const gs_state *pgs)
- {
- const gs_color_space *pcs;
-
- return (!pgs->device->UseCIEColor ||
- (pcs = pgs->device_color_spaces.named.Gray) == 0 ?
- pgs->shared->device_color_spaces.named.Gray : pcs);
- }
- const gs_color_space *
- gs_current_DeviceRGB_space(const gs_state *pgs)
- {
- const gs_color_space *pcs;
-
- return (!pgs->device->UseCIEColor ||
- (pcs = pgs->device_color_spaces.named.RGB) == 0 ?
- pgs->shared->device_color_spaces.named.RGB : pcs);
- }
- const gs_color_space *
- gs_current_DeviceCMYK_space(const gs_state *pgs)
- {
- const gs_color_space *pcs;
-
- return (!pgs->device->UseCIEColor ||
- (pcs = pgs->device_color_spaces.named.CMYK) == 0 ?
- pgs->shared->device_color_spaces.named.CMYK : pcs);
- }
-
- /* .currentsubstitutecolorspace */
- const gs_color_space *
- gs_currentsubstitutecolorspace(const gs_state *pgs, gs_color_space_index csi)
- {
- switch (csi) {
- case gs_color_space_index_DeviceGray:
- return gs_current_DeviceGray_space(pgs);
- case gs_color_space_index_DeviceRGB:
- return gs_current_DeviceRGB_space(pgs);
- case gs_color_space_index_DeviceCMYK:
- return gs_current_DeviceCMYK_space(pgs);
- default:
- return 0;
- }
- }
-