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- /* Copyright (C) 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: gstrans.h,v 1.6 2000/09/19 19:00:32 lpd Exp $ */
- /* Transparency definitions and interface */
-
- #ifndef gstrans_INCLUDED
- # define gstrans_INCLUDED
-
- #include "gstparam.h"
-
- /* Access transparency-related graphics state elements. */
- int gs_setblendmode(P2(gs_state *, gs_blend_mode_t));
- gs_blend_mode_t gs_currentblendmode(P1(const gs_state *));
- int gs_setopacityalpha(P2(gs_state *, floatp));
- float gs_currentopacityalpha(P1(const gs_state *));
- int gs_setshapealpha(P2(gs_state *, floatp));
- float gs_currentshapealpha(P1(const gs_state *));
- int gs_settextknockout(P2(gs_state *, bool));
- bool gs_currenttextknockout(P1(const gs_state *));
-
- /*
- * Manage transparency group and mask rendering. Eventually these will be
- * driver procedures, taking dev + pis instead of pgs.
- */
-
- gs_transparency_state_type_t
- gs_current_transparency_type(P1(const gs_state *pgs));
-
- /*
- * We have to abbreviate the procedure name because procedure names are
- * only unique to 23 characters on VMS.
- */
- void gs_trans_group_params_init(P1(gs_transparency_group_params_t *ptgp));
-
- int gs_begin_transparency_group(P3(gs_state *pgs,
- const gs_transparency_group_params_t *ptgp,
- const gs_rect *pbbox));
-
- int gs_end_transparency_group(P1(gs_state *pgs));
-
- void gs_trans_mask_params_init(P2(gs_transparency_mask_params_t *ptmp,
- gs_transparency_mask_subtype_t subtype));
-
- int gs_begin_transparency_mask(P3(gs_state *pgs,
- const gs_transparency_mask_params_t *ptmp,
- const gs_rect *pbbox));
-
- int gs_end_transparency_mask(P2(gs_state *pgs,
- gs_transparency_channel_selector_t csel));
-
- int gs_init_transparency_mask(P2(gs_state *pgs,
- gs_transparency_channel_selector_t csel));
-
- int gs_discard_transparency_layer(P1(gs_state *pgs));
-
- #endif /* gstrans_INCLUDED */
-