249 lines
6.6 KiB
C
249 lines
6.6 KiB
C
/* $NetBSD: raster_text.c,v 1.9 2007/03/04 06:02:39 christos Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory and to the University
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* of California at Berkeley by Jef Poskanzer.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)raster_text.c 8.1 (Berkeley) 6/11/93
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*/
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/*
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* Text routines for raster library.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: raster_text.c,v 1.9 2007/03/04 06:02:39 christos Exp $");
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#include <sys/param.h>
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#ifdef _KERNEL
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#include <sys/systm.h>
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#include <dev/rcons/raster.h>
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#ifdef COLORFONT_CACHE
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#include <sys/malloc.h>
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#define NEW(size) malloc(size, M_DEVBUF, M_NOWAIT)
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#endif
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#else
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#include <string.h>
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#include "raster.h"
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#ifdef COLORFONT_CACHE
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#include <malloc.h>
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#define NEW(size) malloc(size)
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#endif
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#endif
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/* Draws text. Returns 0 on success, -1 on failure. */
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int
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raster_text( r, x, y, rop, rf, text )
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struct raster* r;
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int x, y;
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int rop;
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struct raster_font* rf;
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unsigned char* text;
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{
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return raster_textn( r, x, y, rop, rf, text, strlen( text ) );
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}
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/* Draws n characters of text. Returns 0 on success, -1 on failure. */
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int
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raster_textn( r, x, y, rop, rf, text, n )
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struct raster* r;
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int x, y;
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int rop;
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struct raster_font* rf;
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unsigned char* text;
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int n;
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{
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int clip;
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int x1, y1;
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struct raster_char* c;
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struct raster* charrast;
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int i;
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unsigned char ch;
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int thisx, thisy;
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int phase;
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/* Check whether we can avoid clipping. */
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clip = 0;
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if ( rf->flags & RASFONT_FIXEDWIDTH &&
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rf->flags & RASFONT_NOVERTICALMOVEMENT )
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{
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/* This font is well-behaved, we can compute the extent cheaply. */
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c = &(rf->chars['@']);
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charrast = c->r;
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if ( x + c->homex < 0 || y + c->homey < 0 ||
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x + c->homex + n * c->nextx > r->width ||
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y + c->homey + charrast->height > r->height )
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clip = 1;
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}
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else
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{
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/* Got to step through the string to compute the extent. */
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for ( i = 0, x1 = x, y1 = y;
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i < n;
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++i, x1 += c->nextx, y1 += c->nexty )
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{
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c = &(rf->chars[text[i]]);
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charrast = c->r;
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if ( charrast != (struct raster*) 0 )
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{
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if ( x1 + c->homex < 0 || y1 + c->homey < 0 ||
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x1 + c->homex + charrast->width > r->width ||
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y1 + c->homey + charrast->height > r->height )
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{
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clip = 1;
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break;
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}
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}
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}
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}
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/* Now display the text. */
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for ( i = 0, x1 = x, y1 = y;
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i < n;
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++i, x1 += c->nextx, y1 += c->nexty )
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{
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ch = text[i];
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c = &(rf->chars[ch]);
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charrast = c->r;
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if ( charrast != (struct raster*) 0 )
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{
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thisx = x1 + c->homex;
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thisy = y1 + c->homey;
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phase = 0;
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#ifdef COLORFONT_CACHE
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if ( r->depth == 8 )
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{
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/* Initialize color font cache if necessary. */
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if ( rf->cache == (struct raster_fontcache*) -1 )
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{
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int c;
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rf->cache = (struct raster_fontcache*)
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NEW( sizeof(struct raster_fontcache) );
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if ( rf->cache != (struct raster_fontcache*) 0 )
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for ( c = 0; c < 256; ++c )
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rf->cache->cr[c] = (struct raster*) 0;
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}
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if ( rf->cache != (struct raster_fontcache*) 0 )
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{
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int color;
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struct raster* cr;
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color = RAS_GETCOLOR( rop );
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cr = rf->cache->cr[ch];
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/* Is this character cached yet? */
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if ( cr != (struct raster*) 0 )
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{
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/* Yes, but is it the right color? */
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if ( rf->cache->color[ch] == color )
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{
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/* Yes - switch rasters. */
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charrast = cr;
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}
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else
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{
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/* No, re-draw it. */
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if ( raster_op_noclip(
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cr, 0, 0, charrast->width,
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charrast->height, rop, charrast, 0, 0 ) == 0 )
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{
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rf->cache->color[ch] = color;
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charrast = cr;
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}
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}
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}
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else
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{
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/* It's not cached, so cache it. */
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cr = raster_alloc(
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charrast->width, charrast->height, 8 );
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if ( cr != (struct raster*) 0 )
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if ( raster_op_noclip(
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cr, 0, 0, charrast->width, charrast->height,
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rop, charrast, 0, 0 ) == 0 )
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{
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rf->cache->color[ch] = color;
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charrast = rf->cache->cr[ch] = cr;
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}
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}
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}
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}
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#endif /*COLORFONT_CACHE*/
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if ( clip )
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{
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if ( raster_op(
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r, thisx, thisy, charrast->width, charrast->height,
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rop, charrast, phase, 0 ) < 0 )
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return -1;
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}
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else
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{
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if ( raster_op_noclip(
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r, thisx, thisy, charrast->width, charrast->height,
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rop, charrast, phase, 0 ) < 0 )
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return -1;
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}
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}
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}
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return 0;
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}
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#ifdef COLORFONT_CACHE
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/* Allocates a raster. Returns (struct raster*) 0 on failure. */
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struct raster*
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raster_alloc( width, height, depth )
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int width, height, depth;
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{
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struct raster* r;
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int linelongs;
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if ( width <= 0 || height <= 0 || ( depth != 1 && depth != 8 ) )
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return (struct raster*) 0;
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linelongs = ( ( width * depth + 31 ) >> 5 );
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r = (struct raster*)
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NEW( sizeof(struct raster) + height * linelongs * sizeof(u_int32_t));
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if ( r == (struct raster*) 0 )
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return (struct raster*) 0;
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r->width = width;
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r->height = height;
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r->depth = depth;
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r->linelongs = linelongs;
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r->pixels = (u_int32_t*) (r + 1);
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r->data = (void *) 0;
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return r;
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}
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#endif
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