NetBSD-5.0.2/sys/dev/rcons/raster_text.c
/* $NetBSD: raster_text.c,v 1.9 2007/03/04 06:02:39 christos Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to the Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory and to the University
* of California at Berkeley by Jef Poskanzer.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* @(#)raster_text.c 8.1 (Berkeley) 6/11/93
*/
/*
* Text routines for raster library.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: raster_text.c,v 1.9 2007/03/04 06:02:39 christos Exp $");
#include <sys/param.h>
#ifdef _KERNEL
#include <sys/systm.h>
#include <dev/rcons/raster.h>
#ifdef COLORFONT_CACHE
#include <sys/malloc.h>
#define NEW(size) malloc(size, M_DEVBUF, M_NOWAIT)
#endif
#else
#include <string.h>
#include "raster.h"
#ifdef COLORFONT_CACHE
#include <malloc.h>
#define NEW(size) malloc(size)
#endif
#endif
/* Draws text. Returns 0 on success, -1 on failure. */
int
raster_text( r, x, y, rop, rf, text )
struct raster* r;
int x, y;
int rop;
struct raster_font* rf;
unsigned char* text;
{
return raster_textn( r, x, y, rop, rf, text, strlen( text ) );
}
/* Draws n characters of text. Returns 0 on success, -1 on failure. */
int
raster_textn( r, x, y, rop, rf, text, n )
struct raster* r;
int x, y;
int rop;
struct raster_font* rf;
unsigned char* text;
int n;
{
int clip;
int x1, y1;
struct raster_char* c;
struct raster* charrast;
int i;
unsigned char ch;
int thisx, thisy;
int phase;
/* Check whether we can avoid clipping. */
clip = 0;
if ( rf->flags & RASFONT_FIXEDWIDTH &&
rf->flags & RASFONT_NOVERTICALMOVEMENT )
{
/* This font is well-behaved, we can compute the extent cheaply. */
c = &(rf->chars['@']);
charrast = c->r;
if ( x + c->homex < 0 || y + c->homey < 0 ||
x + c->homex + n * c->nextx > r->width ||
y + c->homey + charrast->height > r->height )
clip = 1;
}
else
{
/* Got to step through the string to compute the extent. */
for ( i = 0, x1 = x, y1 = y;
i < n;
++i, x1 += c->nextx, y1 += c->nexty )
{
c = &(rf->chars[text[i]]);
charrast = c->r;
if ( charrast != (struct raster*) 0 )
{
if ( x1 + c->homex < 0 || y1 + c->homey < 0 ||
x1 + c->homex + charrast->width > r->width ||
y1 + c->homey + charrast->height > r->height )
{
clip = 1;
break;
}
}
}
}
/* Now display the text. */
for ( i = 0, x1 = x, y1 = y;
i < n;
++i, x1 += c->nextx, y1 += c->nexty )
{
ch = text[i];
c = &(rf->chars[ch]);
charrast = c->r;
if ( charrast != (struct raster*) 0 )
{
thisx = x1 + c->homex;
thisy = y1 + c->homey;
phase = 0;
#ifdef COLORFONT_CACHE
if ( r->depth == 8 )
{
/* Initialize color font cache if necessary. */
if ( rf->cache == (struct raster_fontcache*) -1 )
{
int c;
rf->cache = (struct raster_fontcache*)
NEW( sizeof(struct raster_fontcache) );
if ( rf->cache != (struct raster_fontcache*) 0 )
for ( c = 0; c < 256; ++c )
rf->cache->cr[c] = (struct raster*) 0;
}
if ( rf->cache != (struct raster_fontcache*) 0 )
{
int color;
struct raster* cr;
color = RAS_GETCOLOR( rop );
cr = rf->cache->cr[ch];
/* Is this character cached yet? */
if ( cr != (struct raster*) 0 )
{
/* Yes, but is it the right color? */
if ( rf->cache->color[ch] == color )
{
/* Yes - switch rasters. */
charrast = cr;
}
else
{
/* No, re-draw it. */
if ( raster_op_noclip(
cr, 0, 0, charrast->width,
charrast->height, rop, charrast, 0, 0 ) == 0 )
{
rf->cache->color[ch] = color;
charrast = cr;
}
}
}
else
{
/* It's not cached, so cache it. */
cr = raster_alloc(
charrast->width, charrast->height, 8 );
if ( cr != (struct raster*) 0 )
if ( raster_op_noclip(
cr, 0, 0, charrast->width, charrast->height,
rop, charrast, 0, 0 ) == 0 )
{
rf->cache->color[ch] = color;
charrast = rf->cache->cr[ch] = cr;
}
}
}
}
#endif /*COLORFONT_CACHE*/
if ( clip )
{
if ( raster_op(
r, thisx, thisy, charrast->width, charrast->height,
rop, charrast, phase, 0 ) < 0 )
return -1;
}
else
{
if ( raster_op_noclip(
r, thisx, thisy, charrast->width, charrast->height,
rop, charrast, phase, 0 ) < 0 )
return -1;
}
}
}
return 0;
}
#ifdef COLORFONT_CACHE
/* Allocates a raster. Returns (struct raster*) 0 on failure. */
struct raster*
raster_alloc( width, height, depth )
int width, height, depth;
{
struct raster* r;
int linelongs;
if ( width <= 0 || height <= 0 || ( depth != 1 && depth != 8 ) )
return (struct raster*) 0;
linelongs = ( ( width * depth + 31 ) >> 5 );
r = (struct raster*)
NEW( sizeof(struct raster) + height * linelongs * sizeof(u_int32_t));
if ( r == (struct raster*) 0 )
return (struct raster*) 0;
r->width = width;
r->height = height;
r->depth = depth;
r->linelongs = linelongs;
r->pixels = (u_int32_t*) (r + 1);
r->data = (void *) 0;
return r;
}
#endif