Annotation of sys/dev/rasops/rasops2.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: rasops2.c,v 1.7 2006/08/03 18:42:06 miod Exp $ */
! 2: /* $NetBSD: rasops2.c,v 1.5 2000/04/12 14:22:29 pk Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1999 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Andrew Doran.
! 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 NetBSD
! 22: * Foundation, Inc. and its contributors.
! 23: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 24: * contributors may be used to endorse or promote products derived
! 25: * from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: #include <sys/param.h>
! 41: #include <sys/systm.h>
! 42: #include <sys/time.h>
! 43: #include <machine/endian.h>
! 44:
! 45: #include <dev/wscons/wsdisplayvar.h>
! 46: #include <dev/wscons/wsconsio.h>
! 47: #include <dev/rasops/rasops.h>
! 48: #include <dev/rasops/rasops_masks.h>
! 49:
! 50: void rasops2_copycols(void *, int, int, int, int);
! 51: void rasops2_erasecols(void *, int, int, int, long);
! 52: void rasops2_do_cursor(struct rasops_info *);
! 53: void rasops2_putchar(void *, int, int col, u_int, long);
! 54: u_int rasops2_mergebits(u_char *, int, int);
! 55: #ifndef RASOPS_SMALL
! 56: void rasops2_putchar8(void *, int, int col, u_int, long);
! 57: void rasops2_putchar12(void *, int, int col, u_int, long);
! 58: void rasops2_putchar16(void *, int, int col, u_int, long);
! 59: void rasops2_makestamp(struct rasops_info *, long);
! 60:
! 61: /*
! 62: * 4x1 stamp for optimized character blitting
! 63: */
! 64: static int8_t stamp[16];
! 65: static long stamp_attr;
! 66: static int stamp_mutex; /* XXX see note in README */
! 67: #endif
! 68:
! 69: /*
! 70: * Initialize rasops_info struct for this colordepth.
! 71: */
! 72: void
! 73: rasops2_init(ri)
! 74: struct rasops_info *ri;
! 75: {
! 76: rasops_masks_init();
! 77:
! 78: switch (ri->ri_font->fontwidth) {
! 79: #ifndef RASOPS_SMALL
! 80: case 8:
! 81: ri->ri_ops.putchar = rasops2_putchar8;
! 82: break;
! 83: case 12:
! 84: ri->ri_ops.putchar = rasops2_putchar12;
! 85: break;
! 86: case 16:
! 87: ri->ri_ops.putchar = rasops2_putchar16;
! 88: break;
! 89: #endif /* !RASOPS_SMALL */
! 90: default:
! 91: ri->ri_ops.putchar = rasops2_putchar;
! 92: break;
! 93: }
! 94:
! 95: if ((ri->ri_font->fontwidth & 3) != 0) {
! 96: ri->ri_ops.erasecols = rasops2_erasecols;
! 97: ri->ri_ops.copycols = rasops2_copycols;
! 98: ri->ri_do_cursor = rasops2_do_cursor;
! 99: }
! 100: }
! 101:
! 102: /*
! 103: * Compute a 2bpp expansion of a font element against the given colors.
! 104: * Used by rasops2_putchar() below.
! 105: */
! 106: u_int
! 107: rasops2_mergebits(u_char *fr, int fg, int bg)
! 108: {
! 109: u_int fb, bits;
! 110: int mask, shift;
! 111:
! 112: fg &= 3;
! 113: bg &= 3;
! 114:
! 115: bits = fr[1] | (fr[0] << 8);
! 116: fb = 0;
! 117: for (mask = 0x8000, shift = 32 - 2; mask != 0; mask >>= 1, shift -= 2)
! 118: fb |= (bits & mask ? fg : bg) << shift;
! 119:
! 120: return (fb);
! 121: }
! 122:
! 123: /*
! 124: * Paint a single character. This is the generic version, this is ugly.
! 125: */
! 126: void
! 127: rasops2_putchar(cookie, row, col, uc, attr)
! 128: void *cookie;
! 129: int row, col;
! 130: u_int uc;
! 131: long attr;
! 132: {
! 133: int height, width, fs, rs, bg, fg, lmask, rmask;
! 134: u_int fb;
! 135: struct rasops_info *ri;
! 136: int32_t *rp;
! 137: u_char *fr;
! 138:
! 139: ri = (struct rasops_info *)cookie;
! 140:
! 141: #ifdef RASOPS_CLIPPING
! 142: /* Catches 'row < 0' case too */
! 143: if ((unsigned)row >= (unsigned)ri->ri_rows)
! 144: return;
! 145:
! 146: if ((unsigned)col >= (unsigned)ri->ri_cols)
! 147: return;
! 148: #endif
! 149:
! 150: width = ri->ri_font->fontwidth << 1;
! 151: height = ri->ri_font->fontheight;
! 152: col *= width;
! 153: rp = (int32_t *)(ri->ri_bits + row * ri->ri_yscale + ((col >> 3) & ~3));
! 154: col = col & 31;
! 155: rs = ri->ri_stride;
! 156:
! 157: bg = ri->ri_devcmap[(attr >> 16) & 0xf];
! 158: fg = ri->ri_devcmap[(attr >> 24) & 0xf];
! 159:
! 160: /* If fg and bg match this becomes a space character */
! 161: if (fg == bg || uc == ' ') {
! 162: uc = (u_int)-1;
! 163: fr = 0; /* shutup gcc */
! 164: fs = 0; /* shutup gcc */
! 165: } else {
! 166: uc -= ri->ri_font->firstchar;
! 167: fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
! 168: fs = ri->ri_font->stride;
! 169: }
! 170:
! 171: /* Single word, one mask */
! 172: if ((col + width) <= 32) {
! 173: rmask = rasops_pmask[col][width];
! 174: lmask = ~rmask;
! 175:
! 176: if (uc == (u_int)-1) {
! 177: bg &= rmask;
! 178:
! 179: while (height--) {
! 180: *rp = (*rp & lmask) | bg;
! 181: DELTA(rp, rs, int32_t *);
! 182: }
! 183: } else {
! 184: while (height--) {
! 185: fb = rasops2_mergebits(fr, fg, bg);
! 186: *rp = (*rp & lmask) |
! 187: (MBE(fb >> col) & rmask);
! 188:
! 189: fr += fs;
! 190: DELTA(rp, rs, int32_t *);
! 191: }
! 192: }
! 193:
! 194: /* Do underline */
! 195: if (attr & 1) {
! 196: DELTA(rp, -(ri->ri_stride << 1), int32_t *);
! 197: *rp = (*rp & lmask) | (fg & rmask);
! 198: }
! 199: } else {
! 200: lmask = ~rasops_lmask[col];
! 201: rmask = ~rasops_rmask[(col + width) & 31];
! 202:
! 203: if (uc == (u_int)-1) {
! 204: width = bg & ~rmask;
! 205: bg = bg & ~lmask;
! 206:
! 207: while (height--) {
! 208: rp[0] = (rp[0] & lmask) | bg;
! 209: rp[1] = (rp[1] & rmask) | width;
! 210: DELTA(rp, rs, int32_t *);
! 211: }
! 212: } else {
! 213: width = 32 - col;
! 214:
! 215: while (height--) {
! 216: fb = rasops2_mergebits(fr, fg, bg);
! 217:
! 218: rp[0] = (rp[0] & lmask) |
! 219: MBE(fb >> col);
! 220: rp[1] = (rp[1] & rmask) |
! 221: (MBE(fb << width) & ~rmask);
! 222:
! 223: fr += fs;
! 224: DELTA(rp, rs, int32_t *);
! 225: }
! 226: }
! 227:
! 228: /* Do underline */
! 229: if (attr & 1) {
! 230: DELTA(rp, -(ri->ri_stride << 1), int32_t *);
! 231: rp[0] = (rp[0] & lmask) | (fg & ~lmask);
! 232: rp[1] = (rp[1] & rmask) | (fg & ~rmask);
! 233: }
! 234: }
! 235: }
! 236:
! 237: #ifndef RASOPS_SMALL
! 238: /*
! 239: * Recompute the blitting stamp.
! 240: */
! 241: void
! 242: rasops2_makestamp(ri, attr)
! 243: struct rasops_info *ri;
! 244: long attr;
! 245: {
! 246: int i, fg, bg;
! 247:
! 248: fg = ri->ri_devcmap[(attr >> 24) & 0xf] & 3;
! 249: bg = ri->ri_devcmap[(attr >> 16) & 0xf] & 3;
! 250: stamp_attr = attr;
! 251:
! 252: for (i = 0; i < 16; i++) {
! 253: stamp[i] = (i & 1 ? fg : bg);
! 254: stamp[i] |= (i & 2 ? fg : bg) << 2;
! 255: stamp[i] |= (i & 4 ? fg : bg) << 4;
! 256: stamp[i] |= (i & 8 ? fg : bg) << 6;
! 257: }
! 258: }
! 259:
! 260: /*
! 261: * Put a single character. This is for 8-pixel wide fonts.
! 262: */
! 263: void
! 264: rasops2_putchar8(cookie, row, col, uc, attr)
! 265: void *cookie;
! 266: int row, col;
! 267: u_int uc;
! 268: long attr;
! 269: {
! 270: struct rasops_info *ri;
! 271: int height, fs, rs;
! 272: u_char *fr, *rp;
! 273:
! 274: /* Can't risk remaking the stamp if it's already in use */
! 275: if (stamp_mutex++) {
! 276: stamp_mutex--;
! 277: rasops2_putchar(cookie, row, col, uc, attr);
! 278: return;
! 279: }
! 280:
! 281: ri = (struct rasops_info *)cookie;
! 282:
! 283: #ifdef RASOPS_CLIPPING
! 284: /* Catches 'row < 0' case too */
! 285: if ((unsigned)row >= (unsigned)ri->ri_rows) {
! 286: stamp_mutex--;
! 287: return;
! 288: }
! 289:
! 290: if ((unsigned)col >= (unsigned)ri->ri_cols) {
! 291: stamp_mutex--;
! 292: return;
! 293: }
! 294: #endif
! 295:
! 296: rp = ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale;
! 297: height = ri->ri_font->fontheight;
! 298: rs = ri->ri_stride;
! 299:
! 300: /* Recompute stamp? */
! 301: if (attr != stamp_attr)
! 302: rasops2_makestamp(ri, attr);
! 303:
! 304: if (uc == ' ') {
! 305: int8_t c = stamp[0];
! 306: while (height--) {
! 307: *(int16_t *)rp = c;
! 308: rp += rs;
! 309: }
! 310: } else {
! 311: uc -= ri->ri_font->firstchar;
! 312: fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
! 313: fs = ri->ri_font->stride;
! 314:
! 315: while (height--) {
! 316: rp[0] = stamp[(*fr >> 4) & 0xf];
! 317: rp[1] = stamp[*fr & 0xf];
! 318: fr += fs;
! 319: rp += rs;
! 320: }
! 321: }
! 322:
! 323: /* Do underline */
! 324: if ((attr & 1) != 0)
! 325: *(int16_t *)(rp - (ri->ri_stride << 1)) = stamp[15];
! 326:
! 327: stamp_mutex--;
! 328: }
! 329:
! 330: /*
! 331: * Put a single character. This is for 12-pixel wide fonts.
! 332: */
! 333: void
! 334: rasops2_putchar12(cookie, row, col, uc, attr)
! 335: void *cookie;
! 336: int row, col;
! 337: u_int uc;
! 338: long attr;
! 339: {
! 340: struct rasops_info *ri;
! 341: int height, fs, rs;
! 342: u_char *fr, *rp;
! 343:
! 344: /* Can't risk remaking the stamp if it's already in use */
! 345: if (stamp_mutex++) {
! 346: stamp_mutex--;
! 347: rasops2_putchar(cookie, row, col, uc, attr);
! 348: return;
! 349: }
! 350:
! 351: ri = (struct rasops_info *)cookie;
! 352:
! 353: #ifdef RASOPS_CLIPPING
! 354: /* Catches 'row < 0' case too */
! 355: if ((unsigned)row >= (unsigned)ri->ri_rows) {
! 356: stamp_mutex--;
! 357: return;
! 358: }
! 359:
! 360: if ((unsigned)col >= (unsigned)ri->ri_cols) {
! 361: stamp_mutex--;
! 362: return;
! 363: }
! 364: #endif
! 365:
! 366: rp = ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale;
! 367: height = ri->ri_font->fontheight;
! 368: rs = ri->ri_stride;
! 369:
! 370: /* Recompute stamp? */
! 371: if (attr != stamp_attr)
! 372: rasops2_makestamp(ri, attr);
! 373:
! 374: if (uc == ' ') {
! 375: int8_t c = stamp[0];
! 376: while (height--) {
! 377: rp[0] = rp[1] = rp[2] = c;
! 378: rp += rs;
! 379: }
! 380: } else {
! 381: uc -= ri->ri_font->firstchar;
! 382: fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
! 383: fs = ri->ri_font->stride;
! 384:
! 385: while (height--) {
! 386: rp[0] = stamp[(fr[0] >> 4) & 0xf];
! 387: rp[1] = stamp[fr[0] & 0xf];
! 388: rp[2] = stamp[(fr[1] >> 4) & 0xf];
! 389: fr += fs;
! 390: rp += rs;
! 391: }
! 392: }
! 393:
! 394: /* Do underline */
! 395: if ((attr & 1) != 0) {
! 396: rp -= ri->ri_stride << 1;
! 397: rp[0] = rp[1] = rp[2] = stamp[15];
! 398: }
! 399:
! 400: stamp_mutex--;
! 401: }
! 402:
! 403: /*
! 404: * Put a single character. This is for 16-pixel wide fonts.
! 405: */
! 406: void
! 407: rasops2_putchar16(cookie, row, col, uc, attr)
! 408: void *cookie;
! 409: int row, col;
! 410: u_int uc;
! 411: long attr;
! 412: {
! 413: struct rasops_info *ri;
! 414: int height, fs, rs;
! 415: u_char *fr, *rp;
! 416:
! 417: /* Can't risk remaking the stamp if it's already in use */
! 418: if (stamp_mutex++) {
! 419: stamp_mutex--;
! 420: rasops2_putchar(cookie, row, col, uc, attr);
! 421: return;
! 422: }
! 423:
! 424: ri = (struct rasops_info *)cookie;
! 425:
! 426: #ifdef RASOPS_CLIPPING
! 427: /* Catches 'row < 0' case too */
! 428: if ((unsigned)row >= (unsigned)ri->ri_rows) {
! 429: stamp_mutex--;
! 430: return;
! 431: }
! 432:
! 433: if ((unsigned)col >= (unsigned)ri->ri_cols) {
! 434: stamp_mutex--;
! 435: return;
! 436: }
! 437: #endif
! 438:
! 439: rp = ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale;
! 440: height = ri->ri_font->fontheight;
! 441: rs = ri->ri_stride;
! 442:
! 443: /* Recompute stamp? */
! 444: if (attr != stamp_attr)
! 445: rasops2_makestamp(ri, attr);
! 446:
! 447: if (uc == ' ') {
! 448: int8_t c = stamp[0];
! 449: while (height--) {
! 450: *(int32_t *)rp = c;
! 451: rp += rs;
! 452: }
! 453: } else {
! 454: uc -= ri->ri_font->firstchar;
! 455: fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
! 456: fs = ri->ri_font->stride;
! 457:
! 458: while (height--) {
! 459: rp[0] = stamp[(fr[0] >> 4) & 0xf];
! 460: rp[1] = stamp[fr[0] & 0xf];
! 461: rp[2] = stamp[(fr[1] >> 4) & 0xf];
! 462: rp[3] = stamp[fr[1] & 0xf];
! 463: fr += fs;
! 464: rp += rs;
! 465: }
! 466: }
! 467:
! 468: /* Do underline */
! 469: if ((attr & 1) != 0)
! 470: *(int32_t *)(rp - (ri->ri_stride << 1)) = stamp[15];
! 471:
! 472: stamp_mutex--;
! 473: }
! 474: #endif /* !RASOPS_SMALL */
! 475:
! 476: /*
! 477: * Grab routines common to depths where (bpp < 8)
! 478: */
! 479: #define NAME(ident) rasops2_##ident
! 480: #define PIXEL_SHIFT 1
! 481:
! 482: #include <dev/rasops/rasops_bitops.h>
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