vt_vga.c (271121) | vt_vga.c (271128) |
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1/*- 2 * Copyright (c) 2005 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Copyright (c) 2009 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Ed Schouten --- 17 unchanged lines hidden (view full) --- 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2005 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Copyright (c) 2009 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Ed Schouten --- 17 unchanged lines hidden (view full) --- 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> |
34__FBSDID("$FreeBSD: stable/10/sys/dev/vt/hw/vga/vt_vga.c 271121 2014-09-04 19:22:01Z emaste $"); | 34__FBSDID("$FreeBSD: stable/10/sys/dev/vt/hw/vga/vt_vga.c 271128 2014-09-04 20:18:08Z emaste $"); |
35 36#include <sys/param.h> 37#include <sys/kernel.h> 38#include <sys/systm.h> 39 40#include <dev/vt/vt.h> 41#include <dev/vt/hw/vga/vt_vga_reg.h> 42 --- 6 unchanged lines hidden (view full) --- 49#include <machine/vmparam.h> 50#endif /* __amd64__ || __i386__ */ 51 52struct vga_softc { 53 bus_space_tag_t vga_fb_tag; 54 bus_space_handle_t vga_fb_handle; 55 bus_space_tag_t vga_reg_tag; 56 bus_space_handle_t vga_reg_handle; | 35 36#include <sys/param.h> 37#include <sys/kernel.h> 38#include <sys/systm.h> 39 40#include <dev/vt/vt.h> 41#include <dev/vt/hw/vga/vt_vga_reg.h> 42 --- 6 unchanged lines hidden (view full) --- 49#include <machine/vmparam.h> 50#endif /* __amd64__ || __i386__ */ 51 52struct vga_softc { 53 bus_space_tag_t vga_fb_tag; 54 bus_space_handle_t vga_fb_handle; 55 bus_space_tag_t vga_reg_tag; 56 bus_space_handle_t vga_reg_handle; |
57 int vga_curcolor; | 57 int vga_wmode; 58 term_color_t vga_curfg, vga_curbg; |
58}; 59 60/* Convenience macros. */ 61#define MEM_READ1(sc, ofs) \ 62 bus_space_read_1(sc->vga_fb_tag, sc->vga_fb_handle, ofs) 63#define MEM_WRITE1(sc, ofs, val) \ 64 bus_space_write_1(sc->vga_fb_tag, sc->vga_fb_handle, ofs, val) 65#define REG_READ1(sc, reg) \ 66 bus_space_read_1(sc->vga_reg_tag, sc->vga_reg_handle, reg) 67#define REG_WRITE1(sc, reg, val) \ 68 bus_space_write_1(sc->vga_reg_tag, sc->vga_reg_handle, reg, val) 69 70#define VT_VGA_WIDTH 640 71#define VT_VGA_HEIGHT 480 72#define VT_VGA_MEMSIZE (VT_VGA_WIDTH * VT_VGA_HEIGHT / 8) 73 | 59}; 60 61/* Convenience macros. */ 62#define MEM_READ1(sc, ofs) \ 63 bus_space_read_1(sc->vga_fb_tag, sc->vga_fb_handle, ofs) 64#define MEM_WRITE1(sc, ofs, val) \ 65 bus_space_write_1(sc->vga_fb_tag, sc->vga_fb_handle, ofs, val) 66#define REG_READ1(sc, reg) \ 67 bus_space_read_1(sc->vga_reg_tag, sc->vga_reg_handle, reg) 68#define REG_WRITE1(sc, reg, val) \ 69 bus_space_write_1(sc->vga_reg_tag, sc->vga_reg_handle, reg, val) 70 71#define VT_VGA_WIDTH 640 72#define VT_VGA_HEIGHT 480 73#define VT_VGA_MEMSIZE (VT_VGA_WIDTH * VT_VGA_HEIGHT / 8) 74 |
75/* 76 * VGA is designed to handle 8 pixels at a time (8 pixels in one byte of 77 * memory). 78 */ 79#define VT_VGA_PIXELS_BLOCK 8 80 81/* 82 * We use an off-screen addresses to: 83 * o store the background color; 84 * o store pixels pattern. 85 * Those addresses are then loaded in the latches once. 86 */ 87#define VT_VGA_BGCOLOR_OFFSET VT_VGA_MEMSIZE 88 |
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74static vd_probe_t vga_probe; 75static vd_init_t vga_init; 76static vd_blank_t vga_blank; | 89static vd_probe_t vga_probe; 90static vd_init_t vga_init; 91static vd_blank_t vga_blank; |
77static vd_bitbltchr_t vga_bitbltchr; | 92static vd_bitblt_text_t vga_bitblt_text; 93static vd_bitblt_bmp_t vga_bitblt_bitmap; |
78static vd_drawrect_t vga_drawrect; 79static vd_setpixel_t vga_setpixel; | 94static vd_drawrect_t vga_drawrect; 95static vd_setpixel_t vga_setpixel; |
80static vd_putchar_t vga_putchar; | |
81static vd_postswitch_t vga_postswitch; 82 83static const struct vt_driver vt_vga_driver = { 84 .vd_name = "vga", 85 .vd_probe = vga_probe, 86 .vd_init = vga_init, 87 .vd_blank = vga_blank, | 96static vd_postswitch_t vga_postswitch; 97 98static const struct vt_driver vt_vga_driver = { 99 .vd_name = "vga", 100 .vd_probe = vga_probe, 101 .vd_init = vga_init, 102 .vd_blank = vga_blank, |
88 .vd_bitbltchr = vga_bitbltchr, | 103 .vd_bitblt_text = vga_bitblt_text, 104 .vd_bitblt_bmp = vga_bitblt_bitmap, |
89 .vd_drawrect = vga_drawrect, 90 .vd_setpixel = vga_setpixel, | 105 .vd_drawrect = vga_drawrect, 106 .vd_setpixel = vga_setpixel, |
91 .vd_putchar = vga_putchar, | |
92 .vd_postswitch = vga_postswitch, 93 .vd_priority = VD_PRIORITY_GENERIC, 94}; 95 96/* 97 * Driver supports both text mode and graphics mode. Make sure the 98 * buffer is always big enough to support both. 99 */ 100static struct vga_softc vga_conssoftc; 101VT_DRIVER_DECLARE(vt_vga, vt_vga_driver); 102 103static inline void | 107 .vd_postswitch = vga_postswitch, 108 .vd_priority = VD_PRIORITY_GENERIC, 109}; 110 111/* 112 * Driver supports both text mode and graphics mode. Make sure the 113 * buffer is always big enough to support both. 114 */ 115static struct vga_softc vga_conssoftc; 116VT_DRIVER_DECLARE(vt_vga, vt_vga_driver); 117 118static inline void |
104vga_setcolor(struct vt_device *vd, term_color_t color) | 119vga_setwmode(struct vt_device *vd, int wmode) |
105{ 106 struct vga_softc *sc = vd->vd_softc; 107 | 120{ 121 struct vga_softc *sc = vd->vd_softc; 122 |
108 if (sc->vga_curcolor != color) { 109 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_SET_RESET); 110 REG_WRITE1(sc, VGA_GC_DATA, color); 111 sc->vga_curcolor = color; 112 } 113} | 123 if (sc->vga_wmode == wmode) 124 return; |
114 | 125 |
115static void 116vga_blank(struct vt_device *vd, term_color_t color) 117{ 118 struct vga_softc *sc = vd->vd_softc; 119 u_int ofs; | 126 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_MODE); 127 REG_WRITE1(sc, VGA_GC_DATA, wmode); 128 sc->vga_wmode = wmode; |
120 | 129 |
121 vga_setcolor(vd, color); 122 for (ofs = 0; ofs < VT_VGA_MEMSIZE; ofs++) 123 MEM_WRITE1(sc, ofs, 0xff); | 130 switch (wmode) { 131 case 3: 132 /* Re-enable all plans. */ 133 REG_WRITE1(sc, VGA_SEQ_ADDRESS, VGA_SEQ_MAP_MASK); 134 REG_WRITE1(sc, VGA_SEQ_DATA, VGA_SEQ_MM_EM3 | VGA_SEQ_MM_EM2 | 135 VGA_SEQ_MM_EM1 | VGA_SEQ_MM_EM0); 136 break; 137 } |
124} 125 126static inline void | 138} 139 140static inline void |
127vga_bitblt_put(struct vt_device *vd, u_long dst, term_color_t color, 128 uint8_t v) | 141vga_setfg(struct vt_device *vd, term_color_t color) |
129{ 130 struct vga_softc *sc = vd->vd_softc; 131 | 142{ 143 struct vga_softc *sc = vd->vd_softc; 144 |
132 /* Skip empty writes, in order to avoid palette changes. */ 133 if (v != 0x00) { 134 vga_setcolor(vd, color); 135 /* 136 * When this MEM_READ1() gets disabled, all sorts of 137 * artifacts occur. This is because this read loads the 138 * set of 8 pixels that are about to be changed. There 139 * is one scenario where we can avoid the read, namely 140 * if all pixels are about to be overwritten anyway. 141 */ 142 if (v != 0xff) 143 MEM_READ1(sc, dst); 144 MEM_WRITE1(sc, dst, v); 145 } 146} | 145 vga_setwmode(vd, 3); |
147 | 146 |
148static void 149vga_setpixel(struct vt_device *vd, int x, int y, term_color_t color) 150{ | 147 if (sc->vga_curfg == color) 148 return; |
151 | 149 |
152 vga_bitblt_put(vd, (y * VT_VGA_WIDTH / 8) + (x / 8), color, 153 0x80 >> (x % 8)); | 150 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_SET_RESET); 151 REG_WRITE1(sc, VGA_GC_DATA, color); 152 sc->vga_curfg = color; |
154} 155 | 153} 154 |
156static void 157vga_drawrect(struct vt_device *vd, int x1, int y1, int x2, int y2, int fill, 158 term_color_t color) 159{ 160 int x, y; 161 162 for (y = y1; y <= y2; y++) { 163 if (fill || (y == y1) || (y == y2)) { 164 for (x = x1; x <= x2; x++) 165 vga_setpixel(vd, x, y, color); 166 } else { 167 vga_setpixel(vd, x1, y, color); 168 vga_setpixel(vd, x2, y, color); 169 } 170 } 171} 172 | |
173static inline void | 155static inline void |
174vga_bitblt_draw(struct vt_device *vd, const uint8_t *src, 175 u_long ldst, uint8_t shift, unsigned int width, unsigned int height, 176 term_color_t color, int negate) | 156vga_setbg(struct vt_device *vd, term_color_t color) |
177{ | 157{ |
178 u_long dst; 179 int w; 180 uint8_t b, r, out; | 158 struct vga_softc *sc = vd->vd_softc; |
181 | 159 |
182 for (; height > 0; height--) { 183 dst = ldst; 184 ldst += VT_VGA_WIDTH / 8; 185 r = 0; 186 for (w = width; w > 0; w -= 8) { 187 b = *src++; 188 if (negate) { 189 b = ~b; 190 /* Don't go too far. */ 191 if (w < 8) 192 b &= 0xff << (8 - w); 193 } 194 /* Reintroduce bits from previous column. */ 195 out = (b >> shift) | r; 196 r = b << (8 - shift); 197 vga_bitblt_put(vd, dst++, color, out); 198 } 199 /* Print the remainder. */ 200 vga_bitblt_put(vd, dst, color, r); 201 } 202} | 160 vga_setwmode(vd, 3); |
203 | 161 |
204static void 205vga_bitbltchr(struct vt_device *vd, const uint8_t *src, const uint8_t *mask, 206 int bpl, vt_axis_t top, vt_axis_t left, unsigned int width, 207 unsigned int height, term_color_t fg, term_color_t bg) 208{ 209 u_long dst, ldst; 210 int w; 211 212 /* Don't try to put off screen pixels */ 213 if (((left + width) > VT_VGA_WIDTH) || ((top + height) > 214 VT_VGA_HEIGHT)) | 162 if (sc->vga_curbg == color) |
215 return; 216 | 163 return; 164 |
217 dst = (VT_VGA_WIDTH * top + left) / 8; | 165 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_SET_RESET); 166 REG_WRITE1(sc, VGA_GC_DATA, color); |
218 | 167 |
219 for (; height > 0; height--) { 220 ldst = dst; 221 for (w = width; w > 0; w -= 8) { 222 vga_bitblt_put(vd, ldst, fg, *src); 223 vga_bitblt_put(vd, ldst, bg, ~*src); 224 ldst++; 225 src++; 226 } 227 dst += VT_VGA_WIDTH / 8; 228 } 229} | 168 /* 169 * Write 8 pixels using the background color to an off-screen 170 * byte in the video memory. 171 */ 172 MEM_WRITE1(sc, VT_VGA_BGCOLOR_OFFSET, 0xff); |
230 | 173 |
231/* Bitblt with mask support. Slow. */ 232static void 233vga_maskbitbltchr(struct vt_device *vd, const uint8_t *src, const uint8_t *mask, 234 int bpl, vt_axis_t top, vt_axis_t left, unsigned int width, 235 unsigned int height, term_color_t fg, term_color_t bg) 236{ 237 struct vga_softc *sc = vd->vd_softc; 238 u_long dst; 239 uint8_t shift; | 174 /* 175 * Read those 8 pixels back to load the background color in the 176 * latches register. 177 */ 178 MEM_READ1(sc, VT_VGA_BGCOLOR_OFFSET); |
240 | 179 |
241 dst = (VT_VGA_WIDTH * top + left) / 8; 242 shift = left % 8; | 180 sc->vga_curbg = color; |
243 | 181 |
244 /* Don't try to put off screen pixels */ 245 if (((left + width) > VT_VGA_WIDTH) || ((top + height) > 246 VT_VGA_HEIGHT)) 247 return; 248 249 if (sc->vga_curcolor == fg) { 250 vga_bitblt_draw(vd, src, dst, shift, width, height, fg, 0); 251 vga_bitblt_draw(vd, src, dst, shift, width, height, bg, 1); 252 } else { 253 vga_bitblt_draw(vd, src, dst, shift, width, height, bg, 1); 254 vga_bitblt_draw(vd, src, dst, shift, width, height, fg, 0); 255 } | 182 /* 183 * The Set/Reset register doesn't contain the fg color anymore, 184 * store an invalid color. 185 */ 186 sc->vga_curfg = 0xff; |
256} 257 258/* 259 * Binary searchable table for Unicode to CP437 conversion. 260 */ 261 262struct unicp437 { 263 uint16_t unicode_base; --- 112 unchanged lines hidden (view full) --- 376 return (c - cp437table[mid].unicode_base + 377 cp437table[mid].cp437_base); 378 } 379 380 return '?'; 381} 382 383static void | 187} 188 189/* 190 * Binary searchable table for Unicode to CP437 conversion. 191 */ 192 193struct unicp437 { 194 uint16_t unicode_base; --- 112 unchanged lines hidden (view full) --- 307 return (c - cp437table[mid].unicode_base + 308 cp437table[mid].cp437_base); 309 } 310 311 return '?'; 312} 313 314static void |
384vga_putchar(struct vt_device *vd, term_char_t c, 385 vt_axis_t top, vt_axis_t left, term_color_t fg, term_color_t bg) | 315vga_blank(struct vt_device *vd, term_color_t color) |
386{ 387 struct vga_softc *sc = vd->vd_softc; | 316{ 317 struct vga_softc *sc = vd->vd_softc; |
388 uint8_t ch, attr; | 318 u_int ofs; |
389 | 319 |
320 vga_setfg(vd, color); 321 for (ofs = 0; ofs < VT_VGA_MEMSIZE; ofs++) 322 MEM_WRITE1(sc, ofs, 0xff); 323} 324 325static inline void 326vga_bitblt_put(struct vt_device *vd, u_long dst, term_color_t color, 327 uint8_t v) 328{ 329 struct vga_softc *sc = vd->vd_softc; 330 331 /* Skip empty writes, in order to avoid palette changes. */ 332 if (v != 0x00) { 333 vga_setfg(vd, color); 334 /* 335 * When this MEM_READ1() gets disabled, all sorts of 336 * artifacts occur. This is because this read loads the 337 * set of 8 pixels that are about to be changed. There 338 * is one scenario where we can avoid the read, namely 339 * if all pixels are about to be overwritten anyway. 340 */ 341 if (v != 0xff) { 342 MEM_READ1(sc, dst); 343 344 /* The bg color was trashed by the reads. */ 345 sc->vga_curbg = 0xff; 346 } 347 MEM_WRITE1(sc, dst, v); 348 } 349} 350 351static void 352vga_setpixel(struct vt_device *vd, int x, int y, term_color_t color) 353{ 354 355 vga_bitblt_put(vd, (y * VT_VGA_WIDTH / 8) + (x / 8), color, 356 0x80 >> (x % 8)); 357} 358 359static void 360vga_drawrect(struct vt_device *vd, int x1, int y1, int x2, int y2, int fill, 361 term_color_t color) 362{ 363 int x, y; 364 365 for (y = y1; y <= y2; y++) { 366 if (fill || (y == y1) || (y == y2)) { 367 for (x = x1; x <= x2; x++) 368 vga_setpixel(vd, x, y, color); 369 } else { 370 vga_setpixel(vd, x1, y, color); 371 vga_setpixel(vd, x2, y, color); 372 } 373 } 374} 375 376static void 377vga_compute_shifted_pattern(const uint8_t *src, unsigned int bytes, 378 unsigned int src_x, unsigned int x_count, unsigned int dst_x, 379 uint8_t *pattern, uint8_t *mask) 380{ 381 unsigned int n; 382 383 n = src_x / 8; 384 |
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390 /* | 385 /* |
391 * Convert character to CP437, which is the character set used 392 * by the VGA hardware by default. | 386 * This mask has bits set, where a pixel (ether 0 or 1) 387 * comes from the source bitmap. |
393 */ | 388 */ |
394 ch = vga_get_cp437(c); | 389 if (mask != NULL) { 390 *mask = (0xff 391 >> (8 - x_count)) 392 << (8 - x_count - dst_x); 393 } |
395 | 394 |
395 if (n == (src_x + x_count - 1) / 8) { 396 /* All the pixels we want are in the same byte. */ 397 *pattern = src[n]; 398 if (dst_x >= src_x) 399 *pattern >>= (dst_x - src_x % 8); 400 else 401 *pattern <<= (src_x % 8 - dst_x); 402 } else { 403 /* The pixels we want are split into two bytes. */ 404 if (dst_x >= src_x % 8) { 405 *pattern = 406 src[n] << (8 - dst_x - src_x % 8) | 407 src[n + 1] >> (dst_x - src_x % 8); 408 } else { 409 *pattern = 410 src[n] << (src_x % 8 - dst_x) | 411 src[n + 1] >> (8 - src_x % 8 - dst_x); 412 } 413 } 414} 415 416static void 417vga_copy_bitmap_portion(uint8_t *pattern_2colors, uint8_t *pattern_ncolors, 418 const uint8_t *src, const uint8_t *src_mask, unsigned int src_width, 419 unsigned int src_x, unsigned int dst_x, unsigned int x_count, 420 unsigned int src_y, unsigned int dst_y, unsigned int y_count, 421 term_color_t fg, term_color_t bg, int overwrite) 422{ 423 unsigned int i, bytes; 424 uint8_t pattern, relevant_bits, mask; 425 426 bytes = (src_width + 7) / 8; 427 428 for (i = 0; i < y_count; ++i) { 429 vga_compute_shifted_pattern(src + (src_y + i) * bytes, 430 bytes, src_x, x_count, dst_x, &pattern, &relevant_bits); 431 432 if (src_mask == NULL) { 433 /* 434 * No src mask. Consider that all wanted bits 435 * from the source are "authoritative". 436 */ 437 mask = relevant_bits; 438 } else { 439 /* 440 * There's an src mask. We shift it the same way 441 * we shifted the source pattern. 442 */ 443 vga_compute_shifted_pattern( 444 src_mask + (src_y + i) * bytes, 445 bytes, src_x, x_count, dst_x, 446 &mask, NULL); 447 448 /* Now, only keep the wanted bits among them. */ 449 mask &= relevant_bits; 450 } 451 452 /* 453 * Clear bits from the pattern which must be 454 * transparent, according to the source mask. 455 */ 456 pattern &= mask; 457 458 /* Set the bits in the 2-colors array. */ 459 if (overwrite) 460 pattern_2colors[dst_y + i] &= ~mask; 461 pattern_2colors[dst_y + i] |= pattern; 462 463 if (pattern_ncolors == NULL) 464 continue; 465 466 /* 467 * Set the same bits in the n-colors array. This one 468 * supports transparency, when a given bit is cleared in 469 * all colors. 470 */ 471 if (overwrite) { 472 /* 473 * Ensure that the pixels used by this bitmap are 474 * cleared in other colors. 475 */ 476 for (int j = 0; j < 16; ++j) 477 pattern_ncolors[(dst_y + i) * 16 + j] &= 478 ~mask; 479 } 480 pattern_ncolors[(dst_y + i) * 16 + fg] |= pattern; 481 pattern_ncolors[(dst_y + i) * 16 + bg] |= (~pattern & mask); 482 } 483} 484 485static void 486vga_bitblt_pixels_block_2colors(struct vt_device *vd, const uint8_t *masks, 487 term_color_t fg, term_color_t bg, 488 unsigned int x, unsigned int y, unsigned int height) 489{ 490 unsigned int i, offset; 491 struct vga_softc *sc; 492 |
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396 /* | 493 /* |
397 * Convert colors to VGA attributes. | 494 * The great advantage of Write Mode 3 is that we just need 495 * to load the foreground in the Set/Reset register, load the 496 * background color in the latches register (this is done 497 * through a write in offscreen memory followed by a read of 498 * that data), then write the pattern to video memory. This 499 * pattern indicates if the pixel should use the foreground 500 * color (bit set) or the background color (bit cleared). |
398 */ | 501 */ |
399 attr = bg << 4 | fg; | |
400 | 502 |
401 MEM_WRITE1(sc, 0x18000 + (top * 80 + left) * 2 + 0, ch); 402 MEM_WRITE1(sc, 0x18000 + (top * 80 + left) * 2 + 1, attr); | 503 vga_setbg(vd, bg); 504 vga_setfg(vd, fg); 505 506 sc = vd->vd_softc; 507 offset = (VT_VGA_WIDTH * y + x) / 8; 508 509 for (i = 0; i < height; ++i, offset += VT_VGA_WIDTH / 8) { 510 MEM_WRITE1(sc, offset, masks[i]); 511 } |
403} 404 405static void | 512} 513 514static void |
515vga_bitblt_pixels_block_ncolors(struct vt_device *vd, const uint8_t *masks, 516 unsigned int x, unsigned int y, unsigned int height) 517{ 518 unsigned int i, j, plan, color, offset; 519 struct vga_softc *sc; 520 uint8_t mask, plans[height * 4]; 521 522 sc = vd->vd_softc; 523 524 memset(plans, 0, sizeof(plans)); 525 526 /* 527 * To write a group of pixels using 3 or more colors, we select 528 * Write Mode 0 and write one byte to each plan separately. 529 */ 530 531 /* 532 * We first compute each byte: each plan contains one bit of the 533 * color code for each of the 8 pixels. 534 * 535 * For example, if the 8 pixels are like this: 536 * GBBBBBBY 537 * where: 538 * G (gray) = 0b0111 539 * B (black) = 0b0000 540 * Y (yellow) = 0b0011 541 * 542 * The corresponding for bytes are: 543 * GBBBBBBY 544 * Plan 0: 10000001 = 0x81 545 * Plan 1: 10000001 = 0x81 546 * Plan 2: 10000000 = 0x80 547 * Plan 3: 00000000 = 0x00 548 * | | | 549 * | | +-> 0b0011 (Y) 550 * | +-----> 0b0000 (B) 551 * +--------> 0b0111 (G) 552 */ 553 554 for (i = 0; i < height; ++i) { 555 for (color = 0; color < 16; ++color) { 556 mask = masks[i * 16 + color]; 557 if (mask == 0x00) 558 continue; 559 560 for (j = 0; j < 8; ++j) { 561 if (!((mask >> (7 - j)) & 0x1)) 562 continue; 563 564 /* The pixel "j" uses color "color". */ 565 for (plan = 0; plan < 4; ++plan) 566 plans[i * 4 + plan] |= 567 ((color >> plan) & 0x1) << (7 - j); 568 } 569 } 570 } 571 572 /* 573 * The bytes are ready: we now switch to Write Mode 0 and write 574 * all bytes, one plan at a time. 575 */ 576 vga_setwmode(vd, 0); 577 578 REG_WRITE1(sc, VGA_SEQ_ADDRESS, VGA_SEQ_MAP_MASK); 579 for (plan = 0; plan < 4; ++plan) { 580 /* Select plan. */ 581 REG_WRITE1(sc, VGA_SEQ_DATA, 1 << plan); 582 583 /* Write all bytes for this plan, from Y to Y+height. */ 584 for (i = 0; i < height; ++i) { 585 offset = (VT_VGA_WIDTH * (y + i) + x) / 8; 586 MEM_WRITE1(sc, offset, plans[i * 4 + plan]); 587 } 588 } 589} 590 591static void 592vga_bitblt_one_text_pixels_block(struct vt_device *vd, 593 const struct vt_window *vw, unsigned int x, unsigned int y) 594{ 595 const struct vt_buf *vb; 596 const struct vt_font *vf; 597 unsigned int i, col, row, src_x, x_count; 598 unsigned int used_colors_list[16], used_colors; 599 uint8_t pattern_2colors[vw->vw_font->vf_height]; 600 uint8_t pattern_ncolors[vw->vw_font->vf_height * 16]; 601 term_char_t c; 602 term_color_t fg, bg; 603 const uint8_t *src; 604 605 vb = &vw->vw_buf; 606 vf = vw->vw_font; 607 608 /* 609 * The current pixels block. 610 * 611 * We fill it with portions of characters, because both "grids" 612 * may not match. 613 * 614 * i is the index in this pixels block. 615 */ 616 617 i = x; 618 used_colors = 0; 619 memset(used_colors_list, 0, sizeof(used_colors_list)); 620 memset(pattern_2colors, 0, sizeof(pattern_2colors)); 621 memset(pattern_ncolors, 0, sizeof(pattern_ncolors)); 622 623 if (i < vw->vw_draw_area.tr_begin.tp_col) { 624 /* 625 * i is in the margin used to center the text area on 626 * the screen. 627 */ 628 629 i = vw->vw_draw_area.tr_begin.tp_col; 630 } 631 632 while (i < x + VT_VGA_PIXELS_BLOCK && 633 i < vw->vw_draw_area.tr_end.tp_col) { 634 /* 635 * Find which character is drawn on this pixel in the 636 * pixels block. 637 * 638 * While here, record what colors it uses. 639 */ 640 641 col = (i - vw->vw_draw_area.tr_begin.tp_col) / vf->vf_width; 642 row = (y - vw->vw_draw_area.tr_begin.tp_row) / vf->vf_height; 643 644 c = VTBUF_GET_FIELD(vb, row, col); 645 src = vtfont_lookup(vf, c); 646 647 vt_determine_colors(c, VTBUF_ISCURSOR(vb, row, col), &fg, &bg); 648 if ((used_colors_list[fg] & 0x1) != 0x1) 649 used_colors++; 650 if ((used_colors_list[bg] & 0x2) != 0x2) 651 used_colors++; 652 used_colors_list[fg] |= 0x1; 653 used_colors_list[bg] |= 0x2; 654 655 /* 656 * Compute the portion of the character we want to draw, 657 * because the pixels block may start in the middle of a 658 * character. 659 * 660 * The first pixel to draw in the character is 661 * the current position - 662 * the start position of the character 663 * 664 * The last pixel to draw is either 665 * - the last pixel of the character, or 666 * - the pixel of the character matching the end of 667 * the pixels block 668 * whichever comes first. This position is then 669 * changed to be relative to the start position of the 670 * character. 671 */ 672 673 src_x = i - 674 (col * vf->vf_width + vw->vw_draw_area.tr_begin.tp_col); 675 x_count = min(min( 676 (col + 1) * vf->vf_width + 677 vw->vw_draw_area.tr_begin.tp_col, 678 x + VT_VGA_PIXELS_BLOCK), 679 vw->vw_draw_area.tr_end.tp_col); 680 x_count -= col * vf->vf_width + 681 vw->vw_draw_area.tr_begin.tp_col; 682 x_count -= src_x; 683 684 /* Copy a portion of the character. */ 685 vga_copy_bitmap_portion(pattern_2colors, pattern_ncolors, 686 src, NULL, vf->vf_width, 687 src_x, i % VT_VGA_PIXELS_BLOCK, x_count, 688 0, 0, vf->vf_height, fg, bg, 0); 689 690 /* We move to the next portion. */ 691 i += x_count; 692 } 693 694#ifndef SC_NO_CUTPASTE 695 /* 696 * Copy the mouse pointer bitmap if it's over the current pixels 697 * block. 698 * 699 * We use the saved cursor position (saved in vt_flush()), because 700 * the current position could be different than the one used 701 * to mark the area dirty. 702 */ 703 term_rect_t drawn_area; 704 705 drawn_area.tr_begin.tp_col = x; 706 drawn_area.tr_begin.tp_row = y; 707 drawn_area.tr_end.tp_col = x + VT_VGA_PIXELS_BLOCK; 708 drawn_area.tr_end.tp_row = y + vf->vf_height; 709 if (vd->vd_mshown && vt_is_cursor_in_area(vd, &drawn_area)) { 710 struct vt_mouse_cursor *cursor; 711 unsigned int mx, my; 712 unsigned int dst_x, src_y, dst_y, y_count; 713 714 cursor = vd->vd_mcursor; 715 mx = vd->vd_mx_drawn + vw->vw_draw_area.tr_begin.tp_col; 716 my = vd->vd_my_drawn + vw->vw_draw_area.tr_begin.tp_row; 717 718 /* Compute the portion of the cursor we want to copy. */ 719 src_x = x > mx ? x - mx : 0; 720 dst_x = mx > x ? mx - x : 0; 721 x_count = min(min(min( 722 cursor->width - src_x, 723 x + VT_VGA_PIXELS_BLOCK - mx), 724 vw->vw_draw_area.tr_end.tp_col - mx), 725 VT_VGA_PIXELS_BLOCK); 726 727 /* 728 * The cursor isn't aligned on the Y-axis with 729 * characters, so we need to compute the vertical 730 * start/count. 731 */ 732 src_y = y > my ? y - my : 0; 733 dst_y = my > y ? my - y : 0; 734 y_count = min( 735 min(cursor->height - src_y, y + vf->vf_height - my), 736 vf->vf_height); 737 738 /* Copy the cursor portion. */ 739 vga_copy_bitmap_portion(pattern_2colors, pattern_ncolors, 740 cursor->map, cursor->mask, cursor->width, 741 src_x, dst_x, x_count, src_y, dst_y, y_count, 742 vd->vd_mcursor_fg, vd->vd_mcursor_bg, 1); 743 744 if ((used_colors_list[vd->vd_mcursor_fg] & 0x1) != 0x1) 745 used_colors++; 746 if ((used_colors_list[vd->vd_mcursor_bg] & 0x2) != 0x2) 747 used_colors++; 748 } 749#endif 750 751 /* 752 * The pixels block is completed, we can now draw it on the 753 * screen. 754 */ 755 if (used_colors == 2) 756 vga_bitblt_pixels_block_2colors(vd, pattern_2colors, fg, bg, 757 x, y, vf->vf_height); 758 else 759 vga_bitblt_pixels_block_ncolors(vd, pattern_ncolors, 760 x, y, vf->vf_height); 761} 762 763static void 764vga_bitblt_text_gfxmode(struct vt_device *vd, const struct vt_window *vw, 765 const term_rect_t *area) 766{ 767 const struct vt_font *vf; 768 unsigned int col, row; 769 unsigned int x1, y1, x2, y2, x, y; 770 771 vf = vw->vw_font; 772 773 /* 774 * Compute the top-left pixel position aligned with the video 775 * adapter pixels block size. 776 * 777 * This is calculated from the top-left column of te dirty area: 778 * 779 * 1. Compute the top-left pixel of the character: 780 * col * font width + x offset 781 * 782 * NOTE: x offset is used to center the text area on the 783 * screen. It's expressed in pixels, not in characters 784 * col/row! 785 * 786 * 2. Find the pixel further on the left marking the start of 787 * an aligned pixels block (eg. chunk of 8 pixels): 788 * character's x / blocksize * blocksize 789 * 790 * The division, being made on integers, achieves the 791 * alignment. 792 * 793 * For the Y-axis, we need to compute the character's y 794 * coordinate, but we don't need to align it. 795 */ 796 797 col = area->tr_begin.tp_col; 798 row = area->tr_begin.tp_row; 799 x1 = (int)((col * vf->vf_width + vw->vw_draw_area.tr_begin.tp_col) 800 / VT_VGA_PIXELS_BLOCK) 801 * VT_VGA_PIXELS_BLOCK; 802 y1 = row * vf->vf_height + vw->vw_draw_area.tr_begin.tp_row; 803 804 /* 805 * Compute the bottom right pixel position, again, aligned with 806 * the pixels block size. 807 * 808 * The same rules apply, we just add 1 to base the computation 809 * on the "right border" of the dirty area. 810 */ 811 812 col = area->tr_end.tp_col; 813 row = area->tr_end.tp_row; 814 x2 = (int)((col * vf->vf_width + vw->vw_draw_area.tr_begin.tp_col 815 + VT_VGA_PIXELS_BLOCK - 1) 816 / VT_VGA_PIXELS_BLOCK) 817 * VT_VGA_PIXELS_BLOCK; 818 y2 = row * vf->vf_height + vw->vw_draw_area.tr_begin.tp_row; 819 820 /* Clip the area to the screen size. */ 821 x2 = min(x2, vw->vw_draw_area.tr_end.tp_col); 822 y2 = min(y2, vw->vw_draw_area.tr_end.tp_row); 823 824 /* 825 * Now, we take care of N pixels line at a time (the first for 826 * loop, N = font height), and for these lines, draw one pixels 827 * block at a time (the second for loop), not a character at a 828 * time. 829 * 830 * Therefore, on the X-axis, characters my be drawn partially if 831 * they are not aligned on 8-pixels boundary. 832 * 833 * However, the operation is repeated for the full height of the 834 * font before moving to the next character, because it allows 835 * to keep the color settings and write mode, before perhaps 836 * changing them with the next one. 837 */ 838 839 for (y = y1; y < y2; y += vf->vf_height) { 840 for (x = x1; x < x2; x += VT_VGA_PIXELS_BLOCK) { 841 vga_bitblt_one_text_pixels_block(vd, vw, x, y); 842 } 843 } 844} 845 846static void 847vga_bitblt_text_txtmode(struct vt_device *vd, const struct vt_window *vw, 848 const term_rect_t *area) 849{ 850 struct vga_softc *sc; 851 const struct vt_buf *vb; 852 unsigned int col, row; 853 term_char_t c; 854 term_color_t fg, bg; 855 uint8_t ch, attr; 856 857 sc = vd->vd_softc; 858 vb = &vw->vw_buf; 859 860 for (row = area->tr_begin.tp_row; row < area->tr_end.tp_row; ++row) { 861 for (col = area->tr_begin.tp_col; 862 col < area->tr_end.tp_col; 863 ++col) { 864 /* 865 * Get next character and its associated fg/bg 866 * colors. 867 */ 868 c = VTBUF_GET_FIELD(vb, row, col); 869 vt_determine_colors(c, VTBUF_ISCURSOR(vb, row, col), 870 &fg, &bg); 871 872 /* 873 * Convert character to CP437, which is the 874 * character set used by the VGA hardware by 875 * default. 876 */ 877 ch = vga_get_cp437(TCHAR_CHARACTER(c)); 878 879 /* Convert colors to VGA attributes. */ 880 attr = bg << 4 | fg; 881 882 MEM_WRITE1(sc, 0x18000 + (row * 80 + col) * 2 + 0, 883 ch); 884 MEM_WRITE1(sc, 0x18000 + (row * 80 + col) * 2 + 1, 885 attr); 886 } 887 } 888} 889 890static void 891vga_bitblt_text(struct vt_device *vd, const struct vt_window *vw, 892 const term_rect_t *area) 893{ 894 895 if (!(vd->vd_flags & VDF_TEXTMODE)) { 896 vga_bitblt_text_gfxmode(vd, vw, area); 897 } else { 898 vga_bitblt_text_txtmode(vd, vw, area); 899 } 900} 901 902static void 903vga_bitblt_bitmap(struct vt_device *vd, const struct vt_window *vw, 904 const uint8_t *pattern, const uint8_t *mask, 905 unsigned int width, unsigned int height, 906 unsigned int x, unsigned int y, term_color_t fg, term_color_t bg) 907{ 908 unsigned int x1, y1, x2, y2, i, j, src_x, dst_x, x_count; 909 uint8_t pattern_2colors; 910 911 /* Align coordinates with the 8-pxels grid. */ 912 x1 = x / VT_VGA_PIXELS_BLOCK * VT_VGA_PIXELS_BLOCK; 913 y1 = y; 914 915 x2 = (x + width + VT_VGA_PIXELS_BLOCK - 1) / 916 VT_VGA_PIXELS_BLOCK * VT_VGA_PIXELS_BLOCK; 917 y2 = y + height; 918 x2 = min(x2, vd->vd_width - 1); 919 y2 = min(y2, vd->vd_height - 1); 920 921 for (j = y1; j < y2; ++j) { 922 src_x = 0; 923 dst_x = x - x1; 924 x_count = VT_VGA_PIXELS_BLOCK - dst_x; 925 926 for (i = x1; i < x2; i += VT_VGA_PIXELS_BLOCK) { 927 pattern_2colors = 0; 928 929 vga_copy_bitmap_portion( 930 &pattern_2colors, NULL, 931 pattern, mask, width, 932 src_x, dst_x, x_count, 933 j - y1, 0, 1, fg, bg, 0); 934 935 vga_bitblt_pixels_block_2colors(vd, 936 &pattern_2colors, fg, bg, 937 i, j, 1); 938 939 src_x += x_count; 940 dst_x = (dst_x + x_count) % VT_VGA_PIXELS_BLOCK; 941 x_count = min(width - src_x, VT_VGA_PIXELS_BLOCK); 942 } 943 } 944} 945 946static void |
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406vga_initialize_graphics(struct vt_device *vd) 407{ 408 struct vga_softc *sc = vd->vd_softc; 409 410 /* Clock select. */ 411 REG_WRITE1(sc, VGA_GEN_MISC_OUTPUT_W, VGA_GEN_MO_VSP | VGA_GEN_MO_HSP | 412 VGA_GEN_MO_PB | VGA_GEN_MO_ER | VGA_GEN_MO_IOA); 413 /* Set sequencer clocking and memory mode. */ --- 206 unchanged lines hidden (view full) --- 620 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_MODE_CONTROL); 621 x = REG_READ1(sc, VGA_CRTC_DATA); 622 REG_WRITE1(sc, VGA_CRTC_DATA, x | VGA_CRTC_MC_HR); 623 624 if (!textmode) { 625 /* Switch to write mode 3, because we'll mainly do bitblt. */ 626 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_MODE); 627 REG_WRITE1(sc, VGA_GC_DATA, 3); | 947vga_initialize_graphics(struct vt_device *vd) 948{ 949 struct vga_softc *sc = vd->vd_softc; 950 951 /* Clock select. */ 952 REG_WRITE1(sc, VGA_GEN_MISC_OUTPUT_W, VGA_GEN_MO_VSP | VGA_GEN_MO_HSP | 953 VGA_GEN_MO_PB | VGA_GEN_MO_ER | VGA_GEN_MO_IOA); 954 /* Set sequencer clocking and memory mode. */ --- 206 unchanged lines hidden (view full) --- 1161 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_MODE_CONTROL); 1162 x = REG_READ1(sc, VGA_CRTC_DATA); 1163 REG_WRITE1(sc, VGA_CRTC_DATA, x | VGA_CRTC_MC_HR); 1164 1165 if (!textmode) { 1166 /* Switch to write mode 3, because we'll mainly do bitblt. */ 1167 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_MODE); 1168 REG_WRITE1(sc, VGA_GC_DATA, 3); |
1169 sc->vga_wmode = 3; 1170 1171 /* 1172 * In Write Mode 3, Enable Set/Reset is ignored, but we 1173 * use Write Mode 0 to write a group of 8 pixels using 1174 * 3 or more colors. In this case, we want to disable 1175 * Set/Reset: set Enable Set/Reset to 0. 1176 */ |
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628 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_ENABLE_SET_RESET); | 1177 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_ENABLE_SET_RESET); |
629 REG_WRITE1(sc, VGA_GC_DATA, 0x0f); | 1178 REG_WRITE1(sc, VGA_GC_DATA, 0x00); 1179 1180 /* 1181 * Clear the colors we think are loaded into Set/Reset or 1182 * the latches. 1183 */ 1184 sc->vga_curfg = sc->vga_curbg = 0xff; |
630 } 631} 632 633static int 634vga_probe(struct vt_device *vd) 635{ 636 637 return (CN_INTERNAL); --- 50 unchanged lines hidden --- | 1185 } 1186} 1187 1188static int 1189vga_probe(struct vt_device *vd) 1190{ 1191 1192 return (CN_INTERNAL); --- 50 unchanged lines hidden --- |