Home | History | Annotate | Line # | Download | only in wscons
wsdisplay_glyphcachevar.h revision 1.1 
      1 /*	$NetBSD: wsdisplay_glyphcachevar.h,v 1.1 2012/02/16 17:29:21 macallan Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2012 Michael Lorenz
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 /* a simple glyph cache in offscreen memory */
     29 
     30 #ifndef WSDISPLAY_GLYPHCACHEVAR_H
     31 #define WSDISPLAY_GLYPHCACHEVAR_H
     32 
     33 typedef struct _glyphcache {
     34 	/* mapping char codes to cache cells */
     35 	volatile unsigned int gc_usedcells;
     36 	int gc_numcells;
     37 	int gc_map[256];
     38 	/* geometry */
     39 	int gc_cellwidth;
     40 	int gc_cellheight;
     41 	int gc_cellsperline;
     42 	int gc_firstline;	/* first line in vram to use for glyphs */
     43 	long gc_attr;
     44 	/*
     45 	 * method to copy glyphs within vram,
     46 	 * to be initialized before calling glyphcache_init()
     47 	 */
     48 	void (*gc_bitblt)(void *, int, int, int, int, int, int, int);
     49 	void *gc_blitcookie;
     50 	int gc_rop;
     51 } glyphcache;
     52 
     53 /* first line, lines, width, cellwidth, cellheight, attr */
     54 int glyphcache_init(glyphcache *, int, int, int, int, int, long);
     55 /* clear out the cache, for example when returning from X */
     56 void glyphcache_wipe(glyphcache *);
     57 /* add a glyph to the cache */
     58 int glyphcache_add(glyphcache *, int, int, int); /* char code, x, y */
     59 /* try to draw a glyph from the cache */
     60 int glyphcache_try(glyphcache *, int, int, int, long); /* char code, x, y, attr */
     61 #define	GC_OK	0 /* glyph was in cache and has been drawn */
     62 #define GC_ADD	1 /* glyph is not in cache but can be added */
     63 #define GC_NOPE 2 /* glyph is not in cache and can't be added */
     64 
     65 #endif /* WSDISPLAY_GLYPHCACHEVAR_H */