1 /* $NetBSD: grfabs.c,v 1.13 2005/12/11 12:16:54 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Leo Weppelman. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Leo Weppelman. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * atari abstract graphics driver. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: grfabs.c,v 1.13 2005/12/11 12:16:54 christos Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/queue.h> 43 #include <sys/malloc.h> 44 45 #include <machine/cpu.h> 46 #include <machine/iomap.h> 47 #include <machine/video.h> 48 #include <machine/mfp.h> 49 #include <atari/dev/grfabs_reg.h> 50 51 /* 52 * Function decls 53 */ 54 static dmode_t *get_best_display_mode __P((dimen_t *, int, dmode_t *)); 55 56 /* 57 * List of available graphic modes 58 */ 59 static MODES modes; 60 61 /* 62 * Ugh.. Stuff needed to allocate console structures before the VM-system 63 * is running. There is no malloc() available at that time. 64 * Decision to use these: atari_realconfig == 0 65 */ 66 view_t gra_con_view; 67 colormap_t gra_con_cmap; 68 long gra_con_colors[MAX_CENTRIES]; 69 70 /* 71 * Default colors..... 72 * Currently the TT-low (256 colors) just uses 16 times the 16-color default. 73 * If you have a sensible 256 scale, feel free to add..... 74 * The first 2 colors in all maps are {black,white}, so ite (text) displays 75 * are initially readable. Also, this enables me to supply only 1 map. The 76 * 4 color mode uses the first four entries of the 16 color mode thus giving 77 * a gray scale display. (Maybe we can add an intensity bit to the ite...) 78 */ 79 u_long gra_def_color16[16] = { 80 0x00000000, /* black */ 81 0x00ffffff, /* white */ 82 0x000c0c0c, /* light gray */ 83 0x00808008, /* gray */ 84 0x0000000c, /* blue */ 85 0x00000c00, /* green */ 86 0x00000c0c, /* cyan */ 87 0x00c00000, /* red */ 88 0x00c0000c, /* magenta */ 89 0x00c00c00, /* brown */ 90 0x000000ff, /* light blue */ 91 0x0000ff00, /* light green */ 92 0x0000ffff, /* light cyan */ 93 0x00ff0000, /* light red */ 94 0x00ff00ff, /* light magenta */ 95 0x00ffff00 /* light brown */ 96 }; 97 98 /* 99 * XXX: called from ite console init routine. 100 * Initialize list of possible video modes. 101 */ 102 int 103 grfabs_probe(probe_fun) 104 grf_probe_t probe_fun; 105 { 106 static int inited = 0; 107 108 if (!inited) { 109 LIST_INIT(&modes); 110 inited = 1; 111 } 112 (*probe_fun)(&modes); 113 114 return ((modes.lh_first == NULL) ? 0 : 1); 115 } 116 117 view_t * 118 grf_alloc_view(d, dim, depth) 119 dmode_t *d; 120 dimen_t *dim; 121 u_char depth; 122 { 123 if (!d) 124 d = get_best_display_mode(dim, depth, NULL); 125 if (d) 126 return ((d->grfabs_funcs->alloc_view)(d, dim, depth)); 127 return(NULL); 128 } 129 130 dmode_t * 131 grf_get_best_mode(dim, depth) 132 dimen_t *dim; 133 u_char depth; 134 { 135 return (get_best_display_mode(dim, depth, NULL)); 136 } 137 138 void grf_display_view(v) 139 view_t *v; 140 { 141 (v->mode->grfabs_funcs->display_view)(v); 142 } 143 144 void grf_remove_view(v) 145 view_t *v; 146 { 147 (v->mode->grfabs_funcs->remove_view)(v); 148 } 149 150 void grf_save_view(v) 151 view_t *v; 152 { 153 (v->mode->grfabs_funcs->save_view)(v); 154 } 155 156 void grf_free_view(v) 157 view_t *v; 158 { 159 (v->mode->grfabs_funcs->free_view)(v); 160 } 161 162 int 163 grf_get_colormap(v, cm) 164 view_t *v; 165 colormap_t *cm; 166 { 167 colormap_t *gcm; 168 int i, n; 169 u_long *sv_entry; 170 171 gcm = v->colormap; 172 n = cm->size < gcm->size ? cm->size : gcm->size; 173 174 /* 175 * Copy struct from view but be carefull to keep 'entry' 176 */ 177 sv_entry = cm->entry; 178 *cm = *gcm; 179 cm->entry = sv_entry; 180 181 /* 182 * Copy the colors 183 */ 184 bzero(cm->entry, cm->size * sizeof(long)); 185 for (i = 0; i < n; i++) 186 cm->entry[i] = gcm->entry[i]; 187 return (0); 188 } 189 190 int 191 grf_use_colormap(v, cm) 192 view_t *v; 193 colormap_t *cm; 194 { 195 return (v->mode->grfabs_funcs->use_colormap)(v, cm); 196 } 197 198 static dmode_t * 199 get_best_display_mode(dim, depth, curr_mode) 200 int depth; 201 dimen_t *dim; 202 dmode_t *curr_mode; 203 { 204 dmode_t *save; 205 dmode_t *dm; 206 long dx, dy, dd, ct; 207 long size_diff, depth_diff; 208 209 save = NULL; 210 size_diff = 0; 211 depth_diff = 0; 212 dm = modes.lh_first; 213 while (dm != NULL) { 214 dx = abs(dm->size.width - dim->width); 215 dy = abs(dm->size.height - dim->height); 216 dd = abs(dm->depth - depth); 217 ct = dx + dy; 218 219 if ((save != NULL) && (size_diff == 0)) { 220 if (dd > depth_diff) { 221 dm = dm->link.le_next; 222 continue; 223 } 224 } 225 if ((save == NULL) || (ct <= size_diff)) { 226 save = dm; 227 size_diff = ct; 228 depth_diff = dd; 229 } 230 dm = dm->link.le_next; 231 } 232 /* 233 * Did we do better than the current mode? 234 */ 235 if ((save != NULL) && (curr_mode != NULL)) { 236 dx = abs(curr_mode->size.width - dim->width); 237 dy = abs(curr_mode->size.height - dim->height); 238 dd = abs(curr_mode->depth - depth); 239 ct = dx + dy; 240 if ((ct <= size_diff) && (dd <= depth_diff)) 241 return (NULL); 242 } 243 return (save); 244 } 245