video_subr.c revision 1.10.50.1
1 /* $NetBSD: video_subr.c,v 1.10.50.1 2008/05/18 12:33:38 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: video_subr.c,v 1.10.50.1 2008/05/18 12:33:38 yamt Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/malloc.h> 38 39 #include <machine/bootinfo.h> 40 41 #include <dev/hpc/video_subr.h> 42 43 #define BPP2 ({ \ 44 u_int8_t bitmap; \ 45 bitmap = *(volatile u_int8_t*)addr; \ 46 *(volatile u_int8_t*)addr = \ 47 (bitmap & ~(0x3 << ((3 - (x % 4)) * 2))); \ 48 }) 49 50 #define BPP4 ({ \ 51 u_int8_t bitmap; \ 52 bitmap = *(volatile u_int8_t*)addr; \ 53 *(volatile u_int8_t*)addr = \ 54 (bitmap & ~(0xf << ((1 - (x % 2)) * 4))); \ 55 }) 56 57 #define BPP8 ({ \ 58 *(volatile u_int8_t*)addr = 0xff; \ 59 }) 60 61 #define BRESENHAM(a, b, c, d, func) ({ \ 62 u_int32_t fbaddr = vc->vc_fbvaddr; \ 63 u_int32_t fbwidth = vc->vc_fbwidth; \ 64 u_int32_t fbdepth = vc->vc_fbdepth; \ 65 len = a, step = b -1; \ 66 if (step == 0) \ 67 return; \ 68 kstep = len == 0 ? 0 : 1; \ 69 for (i = k = 0, j = step / 2; i <= step; i++) { \ 70 x = xbase c; \ 71 y = ybase d; \ 72 addr = fbaddr + (((y * fbwidth + x) * fbdepth) >> 3); \ 73 func; \ 74 j -= len; \ 75 while (j < 0) { \ 76 j += step; \ 77 k += kstep; \ 78 } \ 79 } \ 80 }) 81 82 #define DRAWLINE(func) ({ \ 83 if (x < 0) { \ 84 if (y < 0) { \ 85 if (_y < _x) { \ 86 BRESENHAM(_y, _x, -i, -k, func); \ 87 } else { \ 88 BRESENHAM(_x, _y, -k, -i, func); \ 89 } \ 90 } else { \ 91 if (_y < _x) { \ 92 BRESENHAM(_y, _x, -i, +k, func); \ 93 } else { \ 94 BRESENHAM(_x, _y, -k, +i, func); \ 95 } \ 96 } \ 97 } else { \ 98 if (y < 0) { \ 99 if (_y < _x) { \ 100 BRESENHAM(_y, _x, +i, -k, func); \ 101 } else { \ 102 BRESENHAM(_x, _y, +k, -i, func); \ 103 } \ 104 } else { \ 105 if (_y < _x) { \ 106 BRESENHAM(_y, _x, +i, +k, func); \ 107 } else { \ 108 BRESENHAM(_x, _y, +k, +i, func); \ 109 } \ 110 } \ 111 } \ 112 }) 113 114 #define LINEFUNC(b) \ 115 static void linebpp##b (struct video_chip *, int, int, int, int); \ 116 static void \ 117 linebpp##b(vc, x0, y0, x1, y1) \ 118 struct video_chip *vc; \ 119 int x0, y0, x1, y1; \ 120 { \ 121 u_int32_t addr; \ 122 int i, j, k, len, step, kstep; \ 123 int x, _x, y, _y; \ 124 int xbase, ybase; \ 125 x = x1 - x0; \ 126 y = y1 - y0; \ 127 _x = abs(x); \ 128 _y = abs(y); \ 129 xbase = x0; \ 130 ybase = y0; \ 131 DRAWLINE(BPP##b); \ 132 } 133 134 #define DOTFUNC(b) \ 135 static void dotbpp##b (struct video_chip *, int, int); \ 136 static void \ 137 dotbpp##b(vc, x, y) \ 138 struct video_chip *vc; \ 139 int x, y; \ 140 { \ 141 u_int32_t addr; \ 142 addr = vc->vc_fbvaddr + (((y * vc->vc_fbwidth + x) * \ 143 vc->vc_fbdepth) >> 3); \ 144 BPP##b; \ 145 } 146 147 LINEFUNC(2) 148 LINEFUNC(4) 149 LINEFUNC(8) 150 DOTFUNC(2) 151 DOTFUNC(4) 152 DOTFUNC(8) 153 static void linebpp_unimpl(struct video_chip *, int, int, int, int); 154 static void dotbpp_unimpl(struct video_chip *, int, int); 155 156 int 157 cmap_work_alloc(u_int8_t **r, u_int8_t **g, u_int8_t **b, u_int32_t **rgb, 158 int cnt) 159 { 160 KASSERT(LEGAL_CLUT_INDEX(cnt - 1)); 161 162 #define ALLOC_BUF(x, bit) \ 163 if (x) { \ 164 *x = malloc(cnt * sizeof(u_int ## bit ## _t), \ 165 M_DEVBUF, M_WAITOK); \ 166 if (*x == 0) \ 167 goto errout; \ 168 } 169 ALLOC_BUF(r, 8); 170 ALLOC_BUF(g, 8); 171 ALLOC_BUF(b, 8); 172 ALLOC_BUF(rgb, 32); 173 #undef ALLOCBUF 174 175 return (0); 176 errout: 177 cmap_work_free(*r, *g, *b, *rgb); 178 179 return (ENOMEM); 180 } 181 182 void 183 cmap_work_free(u_int8_t *r, u_int8_t *g, u_int8_t *b, u_int32_t *rgb) 184 { 185 if (r) 186 free(r, M_DEVBUF); 187 if (g) 188 free(g, M_DEVBUF); 189 if (b) 190 free(b, M_DEVBUF); 191 if (rgb) 192 free(rgb, M_DEVBUF); 193 } 194 195 void 196 rgb24_compose(u_int32_t *rgb24, u_int8_t *r, u_int8_t *g, u_int8_t *b, int cnt) 197 { 198 int i; 199 KASSERT(rgb24 && r && g && b && LEGAL_CLUT_INDEX(cnt - 1)); 200 201 for (i = 0; i < cnt; i++) { 202 *rgb24++ = RGB24(r[i], g[i], b[i]); 203 } 204 } 205 206 void 207 rgb24_decompose(u_int32_t *rgb24, u_int8_t *r, u_int8_t *g, u_int8_t *b, 208 int cnt) 209 { 210 int i; 211 KASSERT(rgb24 && r && g && b && LEGAL_CLUT_INDEX(cnt - 1)); 212 213 for (i = 0; i < cnt; i++) { 214 u_int32_t rgb = *rgb24++; 215 *r++ = (rgb >> 16) & 0xff; 216 *g++ = (rgb >> 8) & 0xff; 217 *b++ = rgb & 0xff; 218 } 219 } 220 221 /* 222 * Debug routines. 223 */ 224 void 225 video_calibration_pattern(struct video_chip *vc) 226 { 227 int x, y; 228 229 x = vc->vc_fbwidth - 40; 230 y = vc->vc_fbheight - 40; 231 video_line(vc, 40, 40, x , 40); 232 video_line(vc, x , 40, x , y ); 233 video_line(vc, x , y , 40, y ); 234 video_line(vc, 40, y , 40, 40); 235 video_line(vc, 40, 40, x , y ); 236 video_line(vc, x, 40, 40, y ); 237 } 238 239 static void 240 linebpp_unimpl(struct video_chip *vc, 241 int x0, int y0, 242 int x1, int y1) 243 { 244 245 return; 246 } 247 248 static void 249 dotbpp_unimpl(struct video_chip *vc, int x, int y) 250 { 251 252 return; 253 } 254 255 void 256 video_attach_drawfunc(struct video_chip *vc) 257 { 258 switch (vc->vc_fbdepth) { 259 default: 260 vc->vc_drawline = linebpp_unimpl; 261 vc->vc_drawdot = dotbpp_unimpl; 262 break; 263 case 8: 264 vc->vc_drawline = linebpp8; 265 vc->vc_drawdot = dotbpp8; 266 break; 267 case 4: 268 vc->vc_drawline = linebpp4; 269 vc->vc_drawdot = dotbpp4; 270 break; 271 case 2: 272 vc->vc_drawline = linebpp2; 273 vc->vc_drawdot = dotbpp2; 274 break; 275 } 276 } 277 278 void 279 video_line(struct video_chip *vc, int x0, int y0, int x1, int y1) 280 { 281 if (vc->vc_drawline) 282 vc->vc_drawline(vc, x0, y0, x1, y1); 283 } 284 285 void 286 video_dot(struct video_chip *vc, int x, int y) 287 { 288 if (vc->vc_drawdot) 289 vc->vc_drawdot(vc, x, y); 290 } 291 292 int 293 video_reverse_color() 294 { 295 struct { 296 int reverse, normal; 297 } ctype[] = { 298 { BIFB_D2_M2L_3, BIFB_D2_M2L_0 }, 299 { BIFB_D2_M2L_3x2, BIFB_D2_M2L_0x2 }, 300 { BIFB_D8_FF, BIFB_D8_00 }, 301 { BIFB_D16_FFFF, BIFB_D16_0000, }, 302 { -1, -1 } /* terminator */ 303 }, *ctypep; 304 u_int16_t fbtype; 305 306 /* check reverse color */ 307 fbtype = bootinfo->fb_type; 308 for (ctypep = ctype; ctypep->normal != -1 ; ctypep++) { 309 if (fbtype == ctypep->normal) { 310 return (0); 311 } else if (fbtype == ctypep->reverse) { 312 return (1); 313 } 314 } 315 printf(": WARNING unknown frame buffer type 0x%04x.\n", fbtype); 316 return (0); 317 } 318
Indexes created Sun Sep 28 12:09:53 GMT 2025