/*
* 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.
*/
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_firstcol; /* first column */
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 x, y, lines, width, cellwidth, cellheight, attr */
int glyphcache_init_x(glyphcache *, int, 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);
/* 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);
