1 /* $NetBSD: grfabs.c,v 1.20 2023/12/20 00:40:42 thorpej 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * atari abstract graphics driver. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: grfabs.c,v 1.20 2023/12/20 00:40:42 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/queue.h> 38 39 #include <machine/cpu.h> 40 #include <machine/iomap.h> 41 #include <machine/video.h> 42 #include <machine/mfp.h> 43 #include <atari/dev/grfabs_reg.h> 44 45 /* 46 * Function decls 47 */ 48 static dmode_t *get_best_display_mode(dimen_t *, int, dmode_t *); 49 50 /* 51 * List of available graphic modes 52 */ 53 static MODES modes; 54 55 /* 56 * Ugh.. Stuff needed to allocate console structures before the VM-system 57 * is running. 58 * Decision to use these: atari_realconfig == 0 59 */ 60 view_t gra_con_view; 61 colormap_t gra_con_cmap; 62 long gra_con_colors[MAX_CENTRIES]; 63 64 /* 65 * Default colors..... 66 * Currently the TT-low (256 colors) just uses 16 times the 16-color default. 67 * If you have a sensible 256 scale, feel free to add..... 68 * The first 2 colors in all maps are {black,white}, so ite (text) displays 69 * are initially readable. Also, this enables me to supply only 1 map. The 70 * 4 color mode uses the first four entries of the 16 color mode thus giving 71 * a gray scale display. (Maybe we can add an intensity bit to the ite...) 72 */ 73 u_long gra_def_color16[16] = { 74 0x00000000, /* black */ 75 0x00ffffff, /* white */ 76 0x000c0c0c, /* light gray */ 77 0x00808008, /* gray */ 78 0x0000000c, /* blue */ 79 0x00000c00, /* green */ 80 0x00000c0c, /* cyan */ 81 0x00c00000, /* red */ 82 0x00c0000c, /* magenta */ 83 0x00c00c00, /* brown */ 84 0x000000ff, /* light blue */ 85 0x0000ff00, /* light green */ 86 0x0000ffff, /* light cyan */ 87 0x00ff0000, /* light red */ 88 0x00ff00ff, /* light magenta */ 89 0x00ffff00 /* light brown */ 90 }; 91 92 /* 93 * XXX: called from ite console init routine. 94 * Initialize list of possible video modes. 95 */ 96 int 97 grfabs_probe(grf_probe_t probe_fun) 98 { 99 static int inited = 0; 100 101 if (!inited) { 102 LIST_INIT(&modes); 103 inited = 1; 104 } 105 (*probe_fun)(&modes); 106 107 return ((modes.lh_first == NULL) ? 0 : 1); 108 } 109 110 view_t * 111 grf_alloc_view(dmode_t *d, dimen_t *dim, u_char depth) 112 { 113 if (!d) 114 d = get_best_display_mode(dim, depth, NULL); 115 if (d) 116 return ((d->grfabs_funcs->alloc_view)(d, dim, depth)); 117 return(NULL); 118 } 119 120 dmode_t * 121 grf_get_best_mode(dimen_t *dim, u_char depth) 122 { 123 return (get_best_display_mode(dim, depth, NULL)); 124 } 125 126 void 127 grf_display_view(view_t *v) 128 { 129 (v->mode->grfabs_funcs->display_view)(v); 130 } 131 132 void 133 grf_remove_view(view_t *v) 134 { 135 (v->mode->grfabs_funcs->remove_view)(v); 136 } 137 138 void 139 grf_save_view(view_t *v) 140 { 141 (v->mode->grfabs_funcs->save_view)(v); 142 } 143 144 void 145 grf_free_view(view_t *v) 146 { 147 (v->mode->grfabs_funcs->free_view)(v); 148 } 149 150 int 151 grf_get_colormap(view_t *v, colormap_t *cm) 152 { 153 colormap_t *gcm; 154 int i, n; 155 u_long *sv_entry; 156 157 gcm = v->colormap; 158 n = cm->size < gcm->size ? cm->size : gcm->size; 159 160 /* 161 * Copy struct from view but be carefull to keep 'entry' 162 */ 163 sv_entry = cm->entry; 164 *cm = *gcm; 165 cm->entry = sv_entry; 166 167 /* 168 * Copy the colors 169 */ 170 memset(cm->entry, 0, cm->size * sizeof(long)); 171 for (i = 0; i < n; i++) 172 cm->entry[i] = gcm->entry[i]; 173 return (0); 174 } 175 176 int 177 grf_use_colormap(view_t *v, colormap_t *cm) 178 { 179 return (v->mode->grfabs_funcs->use_colormap)(v, cm); 180 } 181 182 static dmode_t * 183 get_best_display_mode(dimen_t *dim, int depth, dmode_t *curr_mode) 184 { 185 dmode_t *save; 186 dmode_t *dm; 187 long dx, dy, dd, ct; 188 long size_diff, depth_diff; 189 190 save = NULL; 191 size_diff = 0; 192 depth_diff = 0; 193 dm = modes.lh_first; 194 while (dm != NULL) { 195 dx = abs(dm->size.width - dim->width); 196 dy = abs(dm->size.height - dim->height); 197 dd = abs(dm->depth - depth); 198 ct = dx + dy; 199 200 if ((save != NULL) && (size_diff == 0)) { 201 if (dd > depth_diff) { 202 dm = dm->link.le_next; 203 continue; 204 } 205 } 206 if ((save == NULL) || (ct <= size_diff)) { 207 save = dm; 208 size_diff = ct; 209 depth_diff = dd; 210 } 211 dm = dm->link.le_next; 212 } 213 /* 214 * Did we do better than the current mode? 215 */ 216 if ((save != NULL) && (curr_mode != NULL)) { 217 dx = abs(curr_mode->size.width - dim->width); 218 dy = abs(curr_mode->size.height - dim->height); 219 dd = abs(curr_mode->depth - depth); 220 ct = dx + dy; 221 if ((ct <= size_diff) && (dd <= depth_diff)) 222 return (NULL); 223 } 224 return (save); 225 } 226
Indexes created Sun Sep 21 19:09:51 GMT 2025