source: mainline/uspace/srv/fb/ega.c@ 50cfa6c

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 50cfa6c was 50cfa6c, checked in by Jiri Svoboda <jirik.svoboda@…>, 16 years ago

Method for getting console color capabilities. Use to fix invisible tetris pieces.
  • Property mode set to 100644
File size: 10.2 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 <ipc/ipc.h>
42#include <errno.h>
43#include <stdio.h>
44#include <ddi.h>
45#include <sysinfo.h>
46#include <as.h>
47#include <ipc/fb.h>
48#include <ipc/ipc.h>
49#include <ipc/ns.h>
50#include <ipc/services.h>
51#include <libarch/ddi.h>
52#include <io/style.h>
53#include <io/color.h>
54#include <sys/types.h>
55
56#include "ega.h"
57#include "../console/screenbuffer.h"
58#include "main.h"
59
60#define MAX_SAVED_SCREENS 256
61typedef struct saved_screen {
62 short *data;
63} saved_screen;
64
65saved_screen saved_screens[MAX_SAVED_SCREENS];
66
67#define EGA_IO_BASE ((ioport8_t *) 0x3d4)
68#define EGA_IO_SIZE 2
69
70int ega_normal_color = 0x0f;
71int ega_inverted_color = 0xf0;
72
73#define NORMAL_COLOR ega_normal_color
74#define INVERTED_COLOR ega_inverted_color
75
76/* Allow only 1 connection */
77static int client_connected = 0;
78
79static unsigned int scr_width;
80static unsigned int scr_height;
81static uint8_t *scr_addr;
82
83static unsigned int style;
84
85static unsigned attr_to_ega_style(const attrs_t *a);
86static uint8_t ega_glyph(wchar_t ch);
87
88static void clrscr(void)
89{
90 unsigned i;
91
92 for (i = 0; i < scr_width * scr_height; i++) {
93 scr_addr[i * 2] = ' ';
94 scr_addr[i * 2 + 1] = style;
95 }
96}
97
98static void cursor_goto(unsigned int col, unsigned int row)
99{
100 int ega_cursor;
101
102 ega_cursor = col + scr_width * row;
103
104 pio_write_8(EGA_IO_BASE, 0xe);
105 pio_write_8(EGA_IO_BASE + 1, (ega_cursor >> 8) & 0xff);
106 pio_write_8(EGA_IO_BASE, 0xf);
107 pio_write_8(EGA_IO_BASE + 1, ega_cursor & 0xff);
108}
109
110static void cursor_disable(void)
111{
112 uint8_t stat;
113
114 pio_write_8(EGA_IO_BASE, 0xa);
115 stat = pio_read_8(EGA_IO_BASE + 1);
116 pio_write_8(EGA_IO_BASE, 0xa);
117 pio_write_8(EGA_IO_BASE + 1, stat | (1 << 5));
118}
119
120static void cursor_enable(void)
121{
122 uint8_t stat;
123
124 pio_write_8(EGA_IO_BASE, 0xa);
125 stat = pio_read_8(EGA_IO_BASE + 1);
126 pio_write_8(EGA_IO_BASE, 0xa);
127 pio_write_8(EGA_IO_BASE + 1, stat & (~(1 << 5)));
128}
129
130static void scroll(int rows)
131{
132 unsigned i;
133
134 if (rows > 0) {
135 memmove(scr_addr, ((char *) scr_addr) + rows * scr_width * 2,
136 scr_width * scr_height * 2 - rows * scr_width * 2);
137 for (i = 0; i < rows * scr_width; i++)
138 (((short *) scr_addr) + scr_width * scr_height - rows *
139 scr_width)[i] = ((style << 8) + ' ');
140 } else if (rows < 0) {
141 memmove(((char *)scr_addr) - rows * scr_width * 2, scr_addr,
142 scr_width * scr_height * 2 + rows * scr_width * 2);
143 for (i = 0; i < -rows * scr_width; i++)
144 ((short *)scr_addr)[i] = ((style << 8 ) + ' ');
145 }
146}
147
148static void printchar(wchar_t c, unsigned int col, unsigned int row)
149{
150 scr_addr[(row * scr_width + col) * 2] = ega_glyph(c);
151 scr_addr[(row * scr_width + col) * 2 + 1] = style;
152
153 cursor_goto(col + 1, row);
154}
155
156/** Draw text data to viewport.
157 *
158 * @param vport Viewport id
159 * @param data Text data.
160 * @param x Leftmost column of the area.
161 * @param y Topmost row of the area.
162 * @param w Number of rows.
163 * @param h Number of columns.
164 */
165static void draw_text_data(keyfield_t *data, unsigned int x,
166 unsigned int y, unsigned int w, unsigned int h)
167{
168 unsigned int i, j;
169 keyfield_t *field;
170 uint8_t *dp;
171
172 for (j = 0; j < h; j++) {
173 for (i = 0; i < w; i++) {
174 field = &data[j * w + i];
175 dp = &scr_addr[2 * ((y + j) * scr_width + (x + i))];
176
177 dp[0] = ega_glyph(field->character);
178 dp[1] = attr_to_ega_style(&field->attrs);
179 }
180 }
181}
182
183static int save_screen(void)
184{
185 int i;
186
187 for (i = 0; (i < MAX_SAVED_SCREENS) && (saved_screens[i].data); i++)
188 ;
189 if (i == MAX_SAVED_SCREENS)
190 return EINVAL;
191 if (!(saved_screens[i].data = malloc(2 * scr_width * scr_height)))
192 return ENOMEM;
193 memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
194
195 return i;
196}
197
198static int print_screen(int i)
199{
200 if (saved_screens[i].data)
201 memcpy(scr_addr, saved_screens[i].data, 2 * scr_width *
202 scr_height);
203 else
204 return EINVAL;
205 return i;
206}
207
208static int style_to_ega_style(int style)
209{
210 unsigned int ega_style;
211
212 switch (style) {
213 case STYLE_NORMAL:
214 ega_style = INVERTED_COLOR;
215 break;
216 case STYLE_EMPHASIS:
217 ega_style = INVERTED_COLOR | 4;
218 break;
219 default:
220 return INVERTED_COLOR;
221 }
222
223 return ega_style;
224}
225
226static unsigned int color_to_ega_style(int fg_color, int bg_color, int attr)
227{
228 unsigned int style;
229
230 style = (fg_color & 7) | ((bg_color & 7) << 4);
231 if (attr & CATTR_BRIGHT)
232 style = style | 0x08;
233
234 return style;
235}
236
237static unsigned int rgb_to_ega_style(uint32_t fg, uint32_t bg)
238{
239 return (fg > bg) ? NORMAL_COLOR : INVERTED_COLOR;
240}
241
242static unsigned attr_to_ega_style(const attrs_t *a)
243{
244 switch (a->t) {
245 case at_style:
246 return style_to_ega_style(a->a.s.style);
247 case at_rgb:
248 return rgb_to_ega_style(a->a.r.fg_color, a->a.r.bg_color);
249 case at_idx:
250 return color_to_ega_style(a->a.i.fg_color,
251 a->a.i.bg_color, a->a.i.flags);
252 default:
253 return INVERTED_COLOR;
254 }
255}
256
257static uint8_t ega_glyph(wchar_t ch)
258{
259 if (ch >= 0 && ch < 128)
260 return ch;
261
262 return '?';
263}
264
265static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
266{
267 int retval;
268 ipc_callid_t callid;
269 ipc_call_t call;
270 wchar_t c;
271 unsigned int row, col, w, h;
272 int bg_color, fg_color, attr;
273 uint32_t bg_rgb, fg_rgb;
274 keyfield_t *interbuf = NULL;
275 size_t intersize = 0;
276 int i;
277
278 if (client_connected) {
279 ipc_answer_0(iid, ELIMIT);
280 return;
281 }
282 client_connected = 1;
283 ipc_answer_0(iid, EOK); /* Accept connection */
284
285 while (1) {
286 callid = async_get_call(&call);
287 switch (IPC_GET_METHOD(call)) {
288 case IPC_M_PHONE_HUNGUP:
289 client_connected = 0;
290 ipc_answer_0(callid, EOK);
291 return; /* Exit thread */
292 case IPC_M_SHARE_OUT:
293 /* We accept one area for data interchange */
294 intersize = IPC_GET_ARG2(call);
295 if (intersize >= scr_width * scr_height *
296 sizeof(*interbuf)) {
297 receive_comm_area(callid, &call,
298 (void *) &interbuf);
299 continue;
300 }
301 retval = EINVAL;
302 break;
303 case FB_DRAW_TEXT_DATA:
304 col = IPC_GET_ARG1(call);
305 row = IPC_GET_ARG2(call);
306 w = IPC_GET_ARG3(call);
307 h = IPC_GET_ARG4(call);
308 if (!interbuf) {
309 retval = EINVAL;
310 break;
311 }
312 if (col + w > scr_width || row + h > scr_height) {
313 retval = EINVAL;
314 break;
315 }
316 draw_text_data(interbuf, col, row, w, h);
317 retval = 0;
318 break;
319 case FB_GET_CSIZE:
320 ipc_answer_2(callid, EOK, scr_width, scr_height);
321 continue;
322 case FB_GET_COLOR_CAP:
323 ipc_answer_1(callid, EOK, FB_CCAP_INDEXED);
324 continue;
325 case FB_CLEAR:
326 clrscr();
327 retval = 0;
328 break;
329 case FB_PUTCHAR:
330 c = IPC_GET_ARG1(call);
331 col = IPC_GET_ARG2(call);
332 row = IPC_GET_ARG3(call);
333 if (col >= scr_width || row >= scr_height) {
334 retval = EINVAL;
335 break;
336 }
337 printchar(c, col, row);
338 retval = 0;
339 break;
340 case FB_CURSOR_GOTO:
341 col = IPC_GET_ARG1(call);
342 row = IPC_GET_ARG2(call);
343 if (row >= scr_height || col >= scr_width) {
344 retval = EINVAL;
345 break;
346 }
347 cursor_goto(col, row);
348 retval = 0;
349 break;
350 case FB_SCROLL:
351 i = IPC_GET_ARG1(call);
352 if (i > (int) scr_height || i < -((int) scr_height)) {
353 retval = EINVAL;
354 break;
355 }
356 scroll(i);
357 retval = 0;
358 break;
359 case FB_CURSOR_VISIBILITY:
360 if (IPC_GET_ARG1(call))
361 cursor_enable();
362 else
363 cursor_disable();
364 retval = 0;
365 break;
366 case FB_SET_STYLE:
367 style = style_to_ega_style(IPC_GET_ARG1(call));
368 retval = 0;
369 break;
370 case FB_SET_COLOR:
371 fg_color = IPC_GET_ARG1(call);
372 bg_color = IPC_GET_ARG2(call);
373 attr = IPC_GET_ARG3(call);
374 style = color_to_ega_style(fg_color, bg_color, attr);
375 retval = 0;
376 break;
377 case FB_SET_RGB_COLOR:
378 fg_rgb = IPC_GET_ARG1(call);
379 bg_rgb = IPC_GET_ARG2(call);
380 style = rgb_to_ega_style(fg_rgb, bg_rgb);
381 retval = 0;
382 break;
383 case FB_VP_DRAW_PIXMAP:
384 i = IPC_GET_ARG2(call);
385 retval = print_screen(i);
386 break;
387 case FB_VP2PIXMAP:
388 retval = save_screen();
389 break;
390 case FB_DROP_PIXMAP:
391 i = IPC_GET_ARG1(call);
392 if (i >= MAX_SAVED_SCREENS) {
393 retval = EINVAL;
394 break;
395 }
396 if (saved_screens[i].data) {
397 free(saved_screens[i].data);
398 saved_screens[i].data = NULL;
399 }
400 retval = 0;
401 break;
402 case FB_SCREEN_YIELD:
403 case FB_SCREEN_RECLAIM:
404 retval = EOK;
405 break;
406 default:
407 retval = EINVAL;
408 }
409 ipc_answer_0(callid, retval);
410 }
411}
412
413int ega_init(void)
414{
415 void *ega_ph_addr;
416 size_t sz;
417
418 ega_ph_addr = (void *) sysinfo_value("fb.address.physical");
419 scr_width = sysinfo_value("fb.width");
420 scr_height = sysinfo_value("fb.height");
421
422 if (sysinfo_value("fb.blinking")) {
423 ega_normal_color &= 0x77;
424 ega_inverted_color &= 0x77;
425 }
426
427 style = NORMAL_COLOR;
428
429 iospace_enable(task_get_id(), (void *) EGA_IO_BASE, 2);
430
431 sz = scr_width * scr_height * 2;
432 scr_addr = as_get_mappable_page(sz);
433
434 if (physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
435 PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
436 return -1;
437
438 async_set_client_connection(ega_client_connection);
439
440 return 0;
441}
442
443
444/**
445 * @}
446 */
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