/* $NetBSD: wsdisplay_glyphcachevar.h,v 1.5.42.1 2023/07/05 16:09:50 martin Exp $ */ /* * Copyright (c) 2012 Michael Lorenz * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* a simple glyph cache in offscreen memory */ #ifndef WSDISPLAY_GLYPHCACHEVAR_H #define WSDISPLAY_GLYPHCACHEVAR_H #include typedef struct _gc_bucket { int gb_firstcell; int gb_numcells; volatile unsigned int gb_usedcells; int gb_index; /* -1 for unused buckets */ uint32_t gb_map[223]; /* we only care about char codes 0x21 and up */ time_t gb_lastread; } gc_bucket; typedef struct _glyphcache { /* geometry */ int gc_numcells; int gc_cellwidth; int gc_cellstride; int gc_cellalign; int gc_cellheight; int gc_cellsperline; int gc_firstline; /* first line in vram to use for glyphs */ int gc_lines; int gc_width; int gc_fontcookie; /* buckets */ int gc_numbuckets; /* buckets we can use */ int gc_nbuckets; /* buckets allocated */ gc_bucket *gc_buckets; /* we allocate as many as we can get into vram */ gc_bucket *gc_next; /* bucket the next glyph goes into */ long gc_underline; /* draw an underline in glyphcache_add() */ int gc_attrmap[256]; /* mapping a colour attribute to a bucket */ /* * method to copy glyphs within vram, * to be initialized before calling glyphcache_init() */ void (*gc_bitblt)(void *, int, int, int, int, int, int, int); void (*gc_rectfill)(void *, int, int, int, int, long); void *gc_blitcookie; int gc_rop; } glyphcache; /* first line, lines, width, cellwidth, cellheight, attr */ int glyphcache_init(glyphcache *, int, int, int, int, int, long); /* first line, lines, width, cellwidth, cellheight, attr, alignment */ int glyphcache_init_align(glyphcache *, int, int, int, int, int, long, int); /* adapt to changed font */ int glyphcache_reconfig(glyphcache *, int, int, long); /* helper for showscreen_cb */ void glyphcache_adapt(struct vcons_screen *, void *); /* clear out the cache, for example when returning from X */ void glyphcache_wipe(glyphcache *); /* add a glyph to the cache */ int glyphcache_add(glyphcache *, int, int, int); /* char code, x, y */ /* try to draw a glyph from the cache */ int glyphcache_try(glyphcache *, int, int, int, long); /* char code, x, y, attr */ #define GC_OK 0 /* glyph was in cache and has been drawn */ #define GC_ADD 1 /* glyph is not in cache but can be added */ #define GC_NOPE 2 /* glyph is not in cache and can't be added */ /* * draw an underline in the given attribute * must be called by the driver if glyphcache_try() returns GC_NOPE and for * blanks */ void glyphcache_underline(glyphcache *, int, int, long); #endif /* WSDISPLAY_GLYPHCACHEVAR_H */