source: mainline/uspace/srv/hid/fb/ega.c@ 8ff0bd2

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 8ff0bd2 was c6f08726, checked in by Martin Decky <martin@…>, 14 years ago

eradicate PPMs and pixmaps completely
make TGA and image map code more robust
  • Property mode set to 100644
File size: 10.6 KB
Line 
1/*
2 * Copyright (c) 2006 Ondrej Palkovsky
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @defgroup egafb EGA framebuffer
30 * @brief HelenOS EGA framebuffer.
31 * @ingroup fbs
32 * @{
33 */
34/** @file
35 */
36
37#include <stdlib.h>
38#include <unistd.h>
39#include <align.h>
40#include <async.h>
41#include <errno.h>
42#include <stdio.h>
43#include <ddi.h>
44#include <sysinfo.h>
45#include <as.h>
46#include <ipc/fb.h>
47#include <ipc/ns.h>
48#include <ipc/services.h>
49#include <libarch/ddi.h>
50#include <io/style.h>
51#include <io/color.h>
52#include <io/screenbuffer.h>
53#include <sys/types.h>
54#include "ega.h"
55#include "main.h"
56
57// FIXME: remove this header
58#include <abi/ipc/methods.h>
59
60#define MAX_SAVED_SCREENS 256
61
62typedef struct saved_screen {
63 short *data;
64} saved_screen;
65
66saved_screen saved_screens[MAX_SAVED_SCREENS];
67
68#define EGA_IO_BASE ((ioport8_t *) 0x3d4)
69#define EGA_IO_SIZE 2
70
71/* Allow only 1 connection */
72static int client_connected = 0;
73
74static sysarg_t scr_width;
75static sysarg_t scr_height;
76static uint8_t *scr_addr;
77
78static uint8_t style_normal = 0xf0;
79static uint8_t style_inverted = 0x0f;
80static uint8_t style;
81
82static uint8_t style_to_ega_style(uint8_t style)
83{
84 switch (style) {
85 case STYLE_EMPHASIS:
86 return (style_normal | 0x04);
87 case STYLE_SELECTED:
88 return (style_inverted | 0x40);
89 case STYLE_INVERTED:
90 return style_inverted;
91 }
92
93 return style_normal;
94}
95
96static uint8_t color_to_ega_style(uint8_t fg_color, uint8_t bg_color,
97 uint8_t attr)
98{
99 uint8_t style = (fg_color & 7) | ((bg_color & 7) << 4);
100
101 if (attr & CATTR_BRIGHT)
102 style |= 0x08;
103
104 return style;
105}
106
107static uint8_t rgb_to_ega_style(uint32_t fg, uint32_t bg)
108{
109 return (fg > bg) ? style_inverted : style_normal;
110}
111
112static uint8_t attr_to_ega_style(const attrs_t *attr)
113{
114 switch (attr->t) {
115 case at_style:
116 return style_to_ega_style(attr->a.s.style);
117 case at_idx:
118 return color_to_ega_style(attr->a.i.fg_color,
119 attr->a.i.bg_color, attr->a.i.flags);
120 case at_rgb:
121 return rgb_to_ega_style(attr->a.r.fg_color, attr->a.r.bg_color);
122 default:
123 return style_normal;
124 }
125}
126
127static uint8_t ega_glyph(wchar_t ch)
128{
129 if (ch >= 0 && ch < 128)
130 return ch;
131
132 return '?';
133}
134
135static void clrscr(void)
136{
137 unsigned i;
138
139 for (i = 0; i < scr_width * scr_height; i++) {
140 scr_addr[i * 2] = ' ';
141 scr_addr[i * 2 + 1] = style;
142 }
143}
144
145static void cursor_goto(sysarg_t col, sysarg_t row)
146{
147 sysarg_t cursor = col + scr_width * row;
148
149 pio_write_8(EGA_IO_BASE, 0xe);
150 pio_write_8(EGA_IO_BASE + 1, (cursor >> 8) & 0xff);
151 pio_write_8(EGA_IO_BASE, 0xf);
152 pio_write_8(EGA_IO_BASE + 1, cursor & 0xff);
153}
154
155static void cursor_disable(void)
156{
157 pio_write_8(EGA_IO_BASE, 0xa);
158
159 uint8_t stat = pio_read_8(EGA_IO_BASE + 1);
160
161 pio_write_8(EGA_IO_BASE, 0xa);
162 pio_write_8(EGA_IO_BASE + 1, stat | (1 << 5));
163}
164
165static void cursor_enable(void)
166{
167 pio_write_8(EGA_IO_BASE, 0xa);
168
169 uint8_t stat = pio_read_8(EGA_IO_BASE + 1);
170
171 pio_write_8(EGA_IO_BASE, 0xa);
172 pio_write_8(EGA_IO_BASE + 1, stat & (~(1 << 5)));
173}
174
175static void scroll(ssize_t rows)
176{
177 size_t i;
178
179 if (rows > 0) {
180 memmove(scr_addr, ((char *) scr_addr) + rows * scr_width * 2,
181 scr_width * scr_height * 2 - rows * scr_width * 2);
182 for (i = 0; i < rows * scr_width; i++)
183 (((short *) scr_addr) + scr_width * scr_height - rows *
184 scr_width)[i] = ((style << 8) + ' ');
185 } else if (rows < 0) {
186 memmove(((char *)scr_addr) - rows * scr_width * 2, scr_addr,
187 scr_width * scr_height * 2 + rows * scr_width * 2);
188 for (i = 0; i < -rows * scr_width; i++)
189 ((short *) scr_addr)[i] = ((style << 8 ) + ' ');
190 }
191}
192
193static void printchar(wchar_t c, sysarg_t col, sysarg_t row)
194{
195 scr_addr[(row * scr_width + col) * 2] = ega_glyph(c);
196 scr_addr[(row * scr_width + col) * 2 + 1] = style;
197
198 cursor_goto(col + 1, row);
199}
200
201/** Draw text data to viewport.
202 *
203 * @param vport Viewport id
204 * @param data Text data.
205 * @param x Leftmost column of the area.
206 * @param y Topmost row of the area.
207 * @param w Number of rows.
208 * @param h Number of columns.
209 *
210 */
211static void draw_text_data(keyfield_t *data, sysarg_t x, sysarg_t y,
212 sysarg_t w, sysarg_t h)
213{
214 sysarg_t i;
215 sysarg_t j;
216 keyfield_t *field;
217 uint8_t *dp;
218
219 for (j = 0; j < h; j++) {
220 for (i = 0; i < w; i++) {
221 field = &data[j * w + i];
222 dp = &scr_addr[2 * ((y + j) * scr_width + (x + i))];
223
224 dp[0] = ega_glyph(field->character);
225 dp[1] = attr_to_ega_style(&field->attrs);
226 }
227 }
228}
229
230static int save_screen(void)
231{
232 sysarg_t i;
233
234 /* Find empty screen */
235 for (i = 0; (i < MAX_SAVED_SCREENS) && (saved_screens[i].data); i++);
236
237 if (i == MAX_SAVED_SCREENS)
238 return EINVAL;
239
240 if (!(saved_screens[i].data = malloc(2 * scr_width * scr_height)))
241 return ENOMEM;
242
243 memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
244 return (int) i;
245}
246
247static int print_screen(sysarg_t i)
248{
249 if ((i >= MAX_SAVED_SCREENS) || (saved_screens[i].data))
250 memcpy(scr_addr, saved_screens[i].data, 2 * scr_width *
251 scr_height);
252 else
253 return EINVAL;
254
255 return (int) i;
256}
257
258static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall,
259 void *arg)
260{
261 size_t intersize = 0;
262 keyfield_t *interbuf = NULL;
263
264 if (client_connected) {
265 async_answer_0(iid, ELIMIT);
266 return;
267 }
268
269 /* Accept connection */
270 client_connected = 1;
271 async_answer_0(iid, EOK);
272
273 while (true) {
274 ipc_call_t call;
275 ipc_callid_t callid = async_get_call(&call);
276
277 wchar_t c;
278
279 sysarg_t col;
280 sysarg_t row;
281 sysarg_t w;
282 sysarg_t h;
283
284 ssize_t rows;
285
286 uint8_t bg_color;
287 uint8_t fg_color;
288 uint8_t attr;
289
290 uint32_t fg_rgb;
291 uint32_t bg_rgb;
292
293 sysarg_t scr;
294 int retval;
295
296 if (!IPC_GET_IMETHOD(call)) {
297 client_connected = 0;
298 async_answer_0(callid, EOK);
299
300 /* Exit thread */
301 return;
302 }
303
304 switch (IPC_GET_IMETHOD(call)) {
305 case IPC_M_SHARE_OUT:
306 /* We accept one area for data interchange */
307 intersize = IPC_GET_ARG2(call);
308 if (intersize >= scr_width * scr_height *
309 sizeof(*interbuf)) {
310 receive_comm_area(callid, &call,
311 (void *) &interbuf);
312 continue;
313 }
314
315 retval = EINVAL;
316 break;
317 case FB_DRAW_TEXT_DATA:
318 if (!interbuf) {
319 retval = EINVAL;
320 break;
321 }
322
323 col = IPC_GET_ARG1(call);
324 row = IPC_GET_ARG2(call);
325 w = IPC_GET_ARG3(call);
326 h = IPC_GET_ARG4(call);
327
328 if ((col + w > scr_width) || (row + h > scr_height)) {
329 retval = EINVAL;
330 break;
331 }
332
333 draw_text_data(interbuf, col, row, w, h);
334 retval = 0;
335 break;
336 case FB_GET_CSIZE:
337 async_answer_2(callid, EOK, scr_width, scr_height);
338 continue;
339 case FB_GET_COLOR_CAP:
340 async_answer_1(callid, EOK, FB_CCAP_INDEXED);
341 continue;
342 case FB_CLEAR:
343 clrscr();
344 retval = 0;
345 break;
346 case FB_PUTCHAR:
347 c = IPC_GET_ARG1(call);
348 col = IPC_GET_ARG2(call);
349 row = IPC_GET_ARG3(call);
350
351 if ((col >= scr_width) || (row >= scr_height)) {
352 retval = EINVAL;
353 break;
354 }
355
356 printchar(c, col, row);
357 retval = 0;
358 break;
359 case FB_CURSOR_GOTO:
360 col = IPC_GET_ARG1(call);
361 row = IPC_GET_ARG2(call);
362
363 if ((row >= scr_height) || (col >= scr_width)) {
364 retval = EINVAL;
365 break;
366 }
367
368 cursor_goto(col, row);
369 retval = 0;
370 break;
371 case FB_SCROLL:
372 rows = IPC_GET_ARG1(call);
373
374 if (rows >= 0) {
375 if ((sysarg_t) rows > scr_height) {
376 retval = EINVAL;
377 break;
378 }
379 } else {
380 if ((sysarg_t) (-rows) > scr_height) {
381 retval = EINVAL;
382 break;
383 }
384 }
385
386 scroll(rows);
387 retval = 0;
388 break;
389 case FB_CURSOR_VISIBILITY:
390 if (IPC_GET_ARG1(call))
391 cursor_enable();
392 else
393 cursor_disable();
394
395 retval = 0;
396 break;
397 case FB_SET_STYLE:
398 style = style_to_ega_style(IPC_GET_ARG1(call));
399 retval = 0;
400 break;
401 case FB_SET_COLOR:
402 fg_color = IPC_GET_ARG1(call);
403 bg_color = IPC_GET_ARG2(call);
404 attr = IPC_GET_ARG3(call);
405
406 style = color_to_ega_style(fg_color, bg_color, attr);
407 retval = 0;
408 break;
409 case FB_SET_RGB_COLOR:
410 fg_rgb = IPC_GET_ARG1(call);
411 bg_rgb = IPC_GET_ARG2(call);
412
413 style = rgb_to_ega_style(fg_rgb, bg_rgb);
414 retval = 0;
415 break;
416 case FB_VP_DRAW_IMGMAP:
417 scr = IPC_GET_ARG2(call);
418 retval = print_screen(scr);
419 break;
420 case FB_VP2IMGMAP:
421 retval = save_screen();
422 break;
423 case FB_DROP_IMGMAP:
424 scr = IPC_GET_ARG1(call);
425
426 if (scr >= MAX_SAVED_SCREENS) {
427 retval = EINVAL;
428 break;
429 }
430
431 if (saved_screens[scr].data) {
432 free(saved_screens[scr].data);
433 saved_screens[scr].data = NULL;
434 }
435
436 retval = 0;
437 break;
438 case FB_SCREEN_YIELD:
439 case FB_SCREEN_RECLAIM:
440 retval = EOK;
441 break;
442 default:
443 retval = EINVAL;
444 }
445 async_answer_0(callid, retval);
446 }
447}
448
449int ega_init(void)
450{
451 sysarg_t paddr;
452 if (sysinfo_get_value("fb.address.physical", &paddr) != EOK)
453 return -1;
454
455 if (sysinfo_get_value("fb.width", &scr_width) != EOK)
456 return -1;
457
458 if (sysinfo_get_value("fb.height", &scr_height) != EOK)
459 return -1;
460
461 sysarg_t blinking;
462 if (sysinfo_get_value("fb.blinking", &blinking) != EOK)
463 blinking = false;
464
465 void *ega_ph_addr = (void *) paddr;
466 if (blinking) {
467 style_normal &= 0x77;
468 style_inverted &= 0x77;
469 }
470
471 style = style_normal;
472
473 iospace_enable(task_get_id(), (void *) EGA_IO_BASE, 2);
474
475 size_t sz = scr_width * scr_height * 2;
476 scr_addr = as_get_mappable_page(sz);
477
478 if (physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
479 PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
480 return -1;
481
482 async_set_client_connection(ega_client_connection);
483
484 return 0;
485}
486
487/**
488 * @}
489 */
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