86 lines
3.3 KiB
C
86 lines
3.3 KiB
C
/* $NetBSD: wsdisplay_glyphcachevar.h,v 1.4 2012/10/04 10:26:32 macallan Exp $ */
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/*
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* Copyright (c) 2012 Michael Lorenz
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* a simple glyph cache in offscreen memory */
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#ifndef WSDISPLAY_GLYPHCACHEVAR_H
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#define WSDISPLAY_GLYPHCACHEVAR_H
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#include <sys/time.h>
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typedef struct _gc_bucket {
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int gb_firstcell;
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int gb_numcells;
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volatile unsigned int gb_usedcells;
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int gb_index; /* -1 for unused buckets */
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uint32_t gb_map[223]; /* we only care about char codes 0x21 and up */
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time_t gb_lastread;
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} gc_bucket;
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typedef struct _glyphcache {
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/* geometry */
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int gc_numcells;
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int gc_cellwidth;
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int gc_cellheight;
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int gc_cellsperline;
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int gc_firstline; /* first line in vram to use for glyphs */
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/* buckets */
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int gc_numbuckets;
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gc_bucket *gc_buckets; /* we allocate as many as we can get into vram */
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gc_bucket *gc_next; /* bucket the next glyph goes into */
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long gc_underline; /* draw an underline in glyphcache_add() */
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int gc_attrmap[256]; /* mapping a colour attribute to a bucket */
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/*
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* method to copy glyphs within vram,
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* to be initialized before calling glyphcache_init()
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*/
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void (*gc_bitblt)(void *, int, int, int, int, int, int, int);
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void (*gc_rectfill)(void *, int, int, int, int, long);
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void *gc_blitcookie;
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int gc_rop;
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} glyphcache;
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/* first line, lines, width, cellwidth, cellheight, attr */
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int glyphcache_init(glyphcache *, int, int, int, int, int, long);
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/* clear out the cache, for example when returning from X */
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void glyphcache_wipe(glyphcache *);
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/* add a glyph to the cache */
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int glyphcache_add(glyphcache *, int, int, int); /* char code, x, y */
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/* try to draw a glyph from the cache */
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int glyphcache_try(glyphcache *, int, int, int, long); /* char code, x, y, attr */
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#define GC_OK 0 /* glyph was in cache and has been drawn */
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#define GC_ADD 1 /* glyph is not in cache but can be added */
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#define GC_NOPE 2 /* glyph is not in cache and can't be added */
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/*
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* draw an underline in the given attribute
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* must be called by the driver if glyphcache_try() returns GC_NOPE and for
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* blanks
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*/
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void glyphcache_underline(glyphcache *, int, int, long);
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#endif /* WSDISPLAY_GLYPHCACHEVAR_H */
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