/* $NetBSD: raster_text.c,v 1.2 1995/10/04 23:57:22 pk 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. */ #ifdef _KERNEL #include #include #ifdef COLORFONT_CACHE #include #define NEW(size) malloc(size, M_DEVBUF, M_NOWAIT) #endif #else #include #include #ifdef COLORFONT_CACHE #include #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 ) register 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 ) register 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; register 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_long)); if ( r == (struct raster*) 0 ) return (struct raster*) 0; r->width = width; r->height = height; r->depth = depth; r->linelongs = linelongs; r->pixels = (u_long*) (r + 1); r->data = (caddr_t) 0; return r; } #endif