raster_text.c revision 1.1
1 /* $NetBSD: raster_text.c,v 1.1 1995/09/17 19:56:35 pk 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 #ifdef _KERNEL 47 #include <sys/param.h> 48 #include <dev/rcons/raster.h> 49 #ifdef COLORFONT_CACHE 50 #include <sys/malloc.h> 51 #define NEW(size) malloc(size, M_DEVBUF, M_NOWAIT) 52 #endif 53 #else 54 #include <sys/types.h> 55 #include <dev/rcons/raster.h> 56 #ifdef COLORFONT_CACHE 57 #include <malloc.h> 58 #define NEW(size) malloc(size) 59 #endif 60 #endif 61 62 63 /* Draws text. Returns 0 on success, -1 on failure. */ 64 int 65 raster_text( r, x, y, rop, rf, text ) 66 register struct raster* r; 67 int x, y; 68 int rop; 69 struct raster_font* rf; 70 char* text; 71 { 72 return raster_textn( r, x, y, rop, rf, text, strlen( text ) ); 73 } 74 75 /* Draws n characters of text. Returns 0 on success, -1 on failure. */ 76 int 77 raster_textn( r, x, y, rop, rf, text, n ) 78 register struct raster* r; 79 int x, y; 80 int rop; 81 struct raster_font* rf; 82 char* text; 83 int n; 84 { 85 int clip; 86 int x1, y1; 87 struct raster_char* c; 88 struct raster* charrast; 89 int i; 90 register char ch; 91 int thisx, thisy; 92 int phase; 93 94 /* Check whether we can avoid clipping. */ 95 clip = 0; 96 if ( rf->flags & RASFONT_FIXEDWIDTH && 97 rf->flags & RASFONT_NOVERTICALMOVEMENT ) 98 { 99 /* This font is well-behaved, we can compute the extent cheaply. */ 100 c = &(rf->chars['@']); 101 charrast = c->r; 102 if ( x + c->homex < 0 || y + c->homey < 0 || 103 x + c->homex + n * c->nextx > r->width || 104 y + c->homey + charrast->height > r->height ) 105 clip = 1; 106 } 107 else 108 { 109 /* Got to step through the string to compute the extent. */ 110 for ( i = 0, x1 = x, y1 = y; 111 i < n; 112 ++i, x1 += c->nextx, y1 += c->nexty ) 113 { 114 c = &(rf->chars[text[i]]); 115 charrast = c->r; 116 if ( charrast != (struct raster*) 0 ) 117 { 118 if ( x1 + c->homex < 0 || y1 + c->homey < 0 || 119 x1 + c->homex + charrast->width > r->width || 120 y1 + c->homey + charrast->height > r->height ) 121 { 122 clip = 1; 123 break; 124 } 125 } 126 } 127 } 128 129 /* Now display the text. */ 130 for ( i = 0, x1 = x, y1 = y; 131 i < n; 132 ++i, x1 += c->nextx, y1 += c->nexty ) 133 { 134 ch = text[i]; 135 c = &(rf->chars[ch]); 136 charrast = c->r; 137 if ( charrast != (struct raster*) 0 ) 138 { 139 thisx = x1 + c->homex; 140 thisy = y1 + c->homey; 141 142 phase = 0; 143 #ifdef COLORFONT_CACHE 144 if ( r->depth == 8 ) 145 { 146 /* Initialize color font cache if necessary. */ 147 if ( rf->cache == (struct raster_fontcache*) -1 ) 148 { 149 int c; 150 151 rf->cache = (struct raster_fontcache*) 152 NEW( sizeof(struct raster_fontcache) ); 153 if ( rf->cache != (struct raster_fontcache*) 0 ) 154 for ( c = 0; c < 256; ++c ) 155 rf->cache->cr[c] = (struct raster*) 0; 156 } 157 158 if ( rf->cache != (struct raster_fontcache*) 0 ) 159 { 160 int color; 161 struct raster* cr; 162 163 color = RAS_GETCOLOR( rop ); 164 cr = rf->cache->cr[ch]; 165 /* Is this character cached yet? */ 166 if ( cr != (struct raster*) 0 ) 167 { 168 /* Yes, but is it the right color? */ 169 if ( rf->cache->color[ch] == color ) 170 { 171 /* Yes - switch rasters. */ 172 charrast = cr; 173 } 174 else 175 { 176 /* No, re-draw it. */ 177 if ( raster_op_noclip( 178 cr, 0, 0, charrast->width, 179 charrast->height, rop, charrast, 0, 0 ) == 0 ) 180 { 181 rf->cache->color[ch] = color; 182 charrast = cr; 183 } 184 } 185 } 186 else 187 { 188 /* It's not cached, so cache it. */ 189 cr = raster_alloc( 190 charrast->width, charrast->height, 8 ); 191 if ( cr != (struct raster*) 0 ) 192 if ( raster_op_noclip( 193 cr, 0, 0, charrast->width, charrast->height, 194 rop, charrast, 0, 0 ) == 0 ) 195 { 196 rf->cache->color[ch] = color; 197 charrast = rf->cache->cr[ch] = cr; 198 } 199 } 200 } 201 } 202 #endif /*COLORFONT_CACHE*/ 203 204 if ( clip ) 205 { 206 if ( raster_op( 207 r, thisx, thisy, charrast->width, charrast->height, 208 rop, charrast, phase, 0 ) < 0 ) 209 return -1; 210 } 211 else 212 { 213 if ( raster_op_noclip( 214 r, thisx, thisy, charrast->width, charrast->height, 215 rop, charrast, phase, 0 ) < 0 ) 216 return -1; 217 } 218 } 219 } 220 221 return 0; 222 } 223 224 #ifdef COLORFONT_CACHE 225 /* Allocates a raster. Returns (struct raster*) 0 on failure. */ 226 struct raster* 227 raster_alloc( width, height, depth ) 228 int width, height, depth; 229 { 230 struct raster* r; 231 int linelongs; 232 233 if ( width <= 0 || height <= 0 || ( depth != 1 && depth != 8 ) ) 234 return (struct raster*) 0; 235 linelongs = ( ( width * depth + 31 ) >> 5 ); 236 r = (struct raster*) 237 NEW( sizeof(struct raster) + height * linelongs * sizeof(u_long)); 238 if ( r == (struct raster*) 0 ) 239 return (struct raster*) 0; 240 241 r->width = width; 242 r->height = height; 243 r->depth = depth; 244 r->linelongs = linelongs; 245 r->pixels = (u_long*) (r + 1); 246 r->data = (caddr_t) 0; 247 return r; 248 } 249 #endif 250
Indexes created Wed Sep 24 05:09:52 GMT 2025