raster_text.c revision 1.6
1 /* $NetBSD: raster_text.c,v 1.6 2001/11/15 09:48:15 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to the Computer Systems 8 * Engineering Group at Lawrence Berkeley Laboratory and to the University 9 * of California at Berkeley by Jef Poskanzer. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)raster_text.c 8.1 (Berkeley) 6/11/93 40 */ 41 42 /* 43 * Text routines for raster library. 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: raster_text.c,v 1.6 2001/11/15 09:48:15 lukem Exp $"); 48 49 #include <sys/param.h> 50 #ifdef _KERNEL 51 #include <sys/systm.h> 52 #include <dev/rcons/raster.h> 53 #ifdef COLORFONT_CACHE 54 #include <sys/malloc.h> 55 #define NEW(size) malloc(size, M_DEVBUF, M_NOWAIT) 56 #endif 57 #else 58 #include <string.h> 59 #include "raster.h" 60 #ifdef COLORFONT_CACHE 61 #include <malloc.h> 62 #define NEW(size) malloc(size) 63 #endif 64 #endif 65 66 /* Draws text. Returns 0 on success, -1 on failure. */ 67 int 68 raster_text( r, x, y, rop, rf, text ) 69 struct raster* r; 70 int x, y; 71 int rop; 72 struct raster_font* rf; 73 unsigned char* text; 74 { 75 return raster_textn( r, x, y, rop, rf, text, strlen( text ) ); 76 } 77 78 /* Draws n characters of text. Returns 0 on success, -1 on failure. */ 79 int 80 raster_textn( r, x, y, rop, rf, text, n ) 81 struct raster* r; 82 int x, y; 83 int rop; 84 struct raster_font* rf; 85 unsigned char* text; 86 int n; 87 { 88 int clip; 89 int x1, y1; 90 struct raster_char* c; 91 struct raster* charrast; 92 int i; 93 unsigned char ch; 94 int thisx, thisy; 95 int phase; 96 97 /* Check whether we can avoid clipping. */ 98 clip = 0; 99 if ( rf->flags & RASFONT_FIXEDWIDTH && 100 rf->flags & RASFONT_NOVERTICALMOVEMENT ) 101 { 102 /* This font is well-behaved, we can compute the extent cheaply. */ 103 c = &(rf->chars['@']); 104 charrast = c->r; 105 if ( x + c->homex < 0 || y + c->homey < 0 || 106 x + c->homex + n * c->nextx > r->width || 107 y + c->homey + charrast->height > r->height ) 108 clip = 1; 109 } 110 else 111 { 112 /* Got to step through the string to compute the extent. */ 113 for ( i = 0, x1 = x, y1 = y; 114 i < n; 115 ++i, x1 += c->nextx, y1 += c->nexty ) 116 { 117 c = &(rf->chars[text[i]]); 118 charrast = c->r; 119 if ( charrast != (struct raster*) 0 ) 120 { 121 if ( x1 + c->homex < 0 || y1 + c->homey < 0 || 122 x1 + c->homex + charrast->width > r->width || 123 y1 + c->homey + charrast->height > r->height ) 124 { 125 clip = 1; 126 break; 127 } 128 } 129 } 130 } 131 132 /* Now display the text. */ 133 for ( i = 0, x1 = x, y1 = y; 134 i < n; 135 ++i, x1 += c->nextx, y1 += c->nexty ) 136 { 137 ch = text[i]; 138 c = &(rf->chars[ch]); 139 charrast = c->r; 140 if ( charrast != (struct raster*) 0 ) 141 { 142 thisx = x1 + c->homex; 143 thisy = y1 + c->homey; 144 145 phase = 0; 146 #ifdef COLORFONT_CACHE 147 if ( r->depth == 8 ) 148 { 149 /* Initialize color font cache if necessary. */ 150 if ( rf->cache == (struct raster_fontcache*) -1 ) 151 { 152 int c; 153 154 rf->cache = (struct raster_fontcache*) 155 NEW( sizeof(struct raster_fontcache) ); 156 if ( rf->cache != (struct raster_fontcache*) 0 ) 157 for ( c = 0; c < 256; ++c ) 158 rf->cache->cr[c] = (struct raster*) 0; 159 } 160 161 if ( rf->cache != (struct raster_fontcache*) 0 ) 162 { 163 int color; 164 struct raster* cr; 165 166 color = RAS_GETCOLOR( rop ); 167 cr = rf->cache->cr[ch]; 168 /* Is this character cached yet? */ 169 if ( cr != (struct raster*) 0 ) 170 { 171 /* Yes, but is it the right color? */ 172 if ( rf->cache->color[ch] == color ) 173 { 174 /* Yes - switch rasters. */ 175 charrast = cr; 176 } 177 else 178 { 179 /* No, re-draw it. */ 180 if ( raster_op_noclip( 181 cr, 0, 0, charrast->width, 182 charrast->height, rop, charrast, 0, 0 ) == 0 ) 183 { 184 rf->cache->color[ch] = color; 185 charrast = cr; 186 } 187 } 188 } 189 else 190 { 191 /* It's not cached, so cache it. */ 192 cr = raster_alloc( 193 charrast->width, charrast->height, 8 ); 194 if ( cr != (struct raster*) 0 ) 195 if ( raster_op_noclip( 196 cr, 0, 0, charrast->width, charrast->height, 197 rop, charrast, 0, 0 ) == 0 ) 198 { 199 rf->cache->color[ch] = color; 200 charrast = rf->cache->cr[ch] = cr; 201 } 202 } 203 } 204 } 205 #endif /*COLORFONT_CACHE*/ 206 207 if ( clip ) 208 { 209 if ( raster_op( 210 r, thisx, thisy, charrast->width, charrast->height, 211 rop, charrast, phase, 0 ) < 0 ) 212 return -1; 213 } 214 else 215 { 216 if ( raster_op_noclip( 217 r, thisx, thisy, charrast->width, charrast->height, 218 rop, charrast, phase, 0 ) < 0 ) 219 return -1; 220 } 221 } 222 } 223 224 return 0; 225 } 226 227 #ifdef COLORFONT_CACHE 228 /* Allocates a raster. Returns (struct raster*) 0 on failure. */ 229 struct raster* 230 raster_alloc( width, height, depth ) 231 int width, height, depth; 232 { 233 struct raster* r; 234 int linelongs; 235 236 if ( width <= 0 || height <= 0 || ( depth != 1 && depth != 8 ) ) 237 return (struct raster*) 0; 238 linelongs = ( ( width * depth + 31 ) >> 5 ); 239 r = (struct raster*) 240 NEW( sizeof(struct raster) + height * linelongs * sizeof(u_int32_t)); 241 if ( r == (struct raster*) 0 ) 242 return (struct raster*) 0; 243 244 r->width = width; 245 r->height = height; 246 r->depth = depth; 247 r->linelongs = linelongs; 248 r->pixels = (u_int32_t*) (r + 1); 249 r->data = (caddr_t) 0; 250 return r; 251 } 252 #endif 253
Indexes created Tue Sep 23 07:09:52 GMT 2025