source: mainline/uspace/srv/fb/ega.c@ 99272a3

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 99272a3 was 8dc12ac, checked in by Martin Decky <martin@…>, 16 years ago

framebuffer server rewrite: cleanup, always use canonical order of coordinates (x, y)
  • Property mode set to 100644
File size: 10.1 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 int 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 int i;
133 if (rows > 0) {
134 memmove(scr_addr, ((char *) scr_addr) + rows * scr_width * 2,
135 scr_width * scr_height * 2 - rows * scr_width * 2);
136 for (i = 0; i < rows * scr_width; i++)
137 (((short *) scr_addr) + scr_width * scr_height - rows *
138 scr_width)[i] = ((style << 8) + ' ');
139 } else if (rows < 0) {
140 memmove(((char *)scr_addr) - rows * scr_width * 2, scr_addr,
141 scr_width * scr_height * 2 + rows * scr_width * 2);
142 for (i = 0; i < -rows * scr_width; i++)
143 ((short *)scr_addr)[i] = ((style << 8 ) + ' ');
144 }
145}
146
147static void printchar(wchar_t c, unsigned int col, unsigned int row)
148{
149 scr_addr[(row * scr_width + col) * 2] = ega_glyph(c);
150 scr_addr[(row * scr_width + col) * 2 + 1] = style;
151
152 cursor_goto(row, col + 1);
153}
154
155/** Draw text data to viewport.
156 *
157 * @param vport Viewport id
158 * @param data Text data.
159 * @param x Leftmost column of the area.
160 * @param y Topmost row of the area.
161 * @param w Number of rows.
162 * @param h Number of columns.
163 */
164static void draw_text_data(keyfield_t *data, unsigned int x,
165 unsigned int y, unsigned int w, unsigned int h)
166{
167 unsigned int i, j;
168 keyfield_t *field;
169 uint8_t *dp;
170
171 for (j = 0; j < h; j++) {
172 for (i = 0; i < w; i++) {
173 field = &data[j * w + i];
174 dp = &scr_addr[2 * ((y + j) * scr_width + (x + i))];
175
176 dp[0] = ega_glyph(field->character);
177 dp[1] = attr_to_ega_style(&field->attrs);
178 }
179 }
180}
181
182static int save_screen(void)
183{
184 int i;
185
186 for (i = 0; (i < MAX_SAVED_SCREENS) && (saved_screens[i].data); i++)
187 ;
188 if (i == MAX_SAVED_SCREENS)
189 return EINVAL;
190 if (!(saved_screens[i].data = malloc(2 * scr_width * scr_height)))
191 return ENOMEM;
192 memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
193
194 return i;
195}
196
197static int print_screen(int i)
198{
199 if (saved_screens[i].data)
200 memcpy(scr_addr, saved_screens[i].data, 2 * scr_width *
201 scr_height);
202 else
203 return EINVAL;
204 return i;
205}
206
207static int style_to_ega_style(int style)
208{
209 unsigned int ega_style;
210
211 switch (style) {
212 case STYLE_NORMAL:
213 ega_style = INVERTED_COLOR;
214 break;
215 case STYLE_EMPHASIS:
216 ega_style = INVERTED_COLOR | 4;
217 break;
218 default:
219 return INVERTED_COLOR;
220 }
221
222 return ega_style;
223}
224
225static unsigned int color_to_ega_style(int fg_color, int bg_color, int attr)
226{
227 unsigned int style;
228
229 style = (fg_color & 7) | ((bg_color & 7) << 4);
230 if (attr & CATTR_BRIGHT)
231 style = style | 0x08;
232
233 return style;
234}
235
236static unsigned int rgb_to_ega_style(uint32_t fg, uint32_t bg)
237{
238 return (fg > bg) ? NORMAL_COLOR : INVERTED_COLOR;
239}
240
241static unsigned attr_to_ega_style(const attrs_t *a)
242{
243 switch (a->t) {
244 case at_style:
245 return style_to_ega_style(a->a.s.style);
246 case at_rgb:
247 return rgb_to_ega_style(a->a.r.fg_color, a->a.r.bg_color);
248 case at_idx:
249 return color_to_ega_style(a->a.i.fg_color,
250 a->a.i.bg_color, a->a.i.flags);
251 default:
252 return INVERTED_COLOR;
253 }
254}
255
256static uint8_t ega_glyph(wchar_t ch)
257{
258 if (ch >= 0 && ch < 128)
259 return ch;
260
261 return '?';
262}
263
264static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
265{
266 int retval;
267 ipc_callid_t callid;
268 ipc_call_t call;
269 wchar_t c;
270 unsigned int row, col, w, h;
271 int bg_color, fg_color, attr;
272 uint32_t bg_rgb, fg_rgb;
273 keyfield_t *interbuf = NULL;
274 size_t intersize = 0;
275 int i;
276
277 if (client_connected) {
278 ipc_answer_0(iid, ELIMIT);
279 return;
280 }
281 client_connected = 1;
282 ipc_answer_0(iid, EOK); /* Accept connection */
283
284 while (1) {
285 callid = async_get_call(&call);
286 switch (IPC_GET_METHOD(call)) {
287 case IPC_M_PHONE_HUNGUP:
288 client_connected = 0;
289 ipc_answer_0(callid, EOK);
290 return; /* Exit thread */
291 case IPC_M_SHARE_OUT:
292 /* We accept one area for data interchange */
293 intersize = IPC_GET_ARG2(call);
294 if (intersize >= scr_width * scr_height *
295 sizeof(*interbuf)) {
296 receive_comm_area(callid, &call,
297 (void *) &interbuf);
298 continue;
299 }
300 retval = EINVAL;
301 break;
302 case FB_DRAW_TEXT_DATA:
303 col = IPC_GET_ARG1(call);
304 row = IPC_GET_ARG2(call);
305 w = IPC_GET_ARG3(call);
306 h = IPC_GET_ARG4(call);
307 if (!interbuf) {
308 retval = EINVAL;
309 break;
310 }
311 if (col + w > scr_width || row + h > scr_height) {
312 retval = EINVAL;
313 break;
314 }
315 draw_text_data(interbuf, col, row, w, h);
316 retval = 0;
317 break;
318 case FB_GET_CSIZE:
319 ipc_answer_2(callid, EOK, scr_height, scr_width);
320 continue;
321 case FB_CLEAR:
322 clrscr();
323 retval = 0;
324 break;
325 case FB_PUTCHAR:
326 c = IPC_GET_ARG1(call);
327 col = IPC_GET_ARG2(call);
328 row = IPC_GET_ARG3(call);
329 if (col >= scr_width || row >= scr_height) {
330 retval = EINVAL;
331 break;
332 }
333 printchar(c, col, row);
334 retval = 0;
335 break;
336 case FB_CURSOR_GOTO:
337 col = IPC_GET_ARG1(call);
338 row = IPC_GET_ARG2(call);
339 if (row >= scr_height || col >= scr_width) {
340 retval = EINVAL;
341 break;
342 }
343 cursor_goto(col, row);
344 retval = 0;
345 break;
346 case FB_SCROLL:
347 i = IPC_GET_ARG1(call);
348 if (i > scr_height || i < -((int) scr_height)) {
349 retval = EINVAL;
350 break;
351 }
352 scroll(i);
353 retval = 0;
354 break;
355 case FB_CURSOR_VISIBILITY:
356 if (IPC_GET_ARG1(call))
357 cursor_enable();
358 else
359 cursor_disable();
360 retval = 0;
361 break;
362 case FB_SET_STYLE:
363 style = style_to_ega_style(IPC_GET_ARG1(call));
364 retval = 0;
365 break;
366 case FB_SET_COLOR:
367 fg_color = IPC_GET_ARG1(call);
368 bg_color = IPC_GET_ARG2(call);
369 attr = IPC_GET_ARG3(call);
370 style = color_to_ega_style(fg_color, bg_color, attr);
371 retval = 0;
372 break;
373 case FB_SET_RGB_COLOR:
374 fg_rgb = IPC_GET_ARG1(call);
375 bg_rgb = IPC_GET_ARG2(call);
376 style = rgb_to_ega_style(fg_rgb, bg_rgb);
377 retval = 0;
378 break;
379 case FB_VP_DRAW_PIXMAP:
380 i = IPC_GET_ARG2(call);
381 retval = print_screen(i);
382 break;
383 case FB_VP2PIXMAP:
384 retval = save_screen();
385 break;
386 case FB_DROP_PIXMAP:
387 i = IPC_GET_ARG1(call);
388 if (i >= MAX_SAVED_SCREENS) {
389 retval = EINVAL;
390 break;
391 }
392 if (saved_screens[i].data) {
393 free(saved_screens[i].data);
394 saved_screens[i].data = NULL;
395 }
396 retval = 0;
397 break;
398 case FB_SCREEN_YIELD:
399 case FB_SCREEN_RECLAIM:
400 retval = EOK;
401 break;
402 default:
403 retval = EINVAL;
404 }
405 ipc_answer_0(callid, retval);
406 }
407}
408
409int ega_init(void)
410{
411 void *ega_ph_addr;
412 size_t sz;
413
414 ega_ph_addr = (void *) sysinfo_value("fb.address.physical");
415 scr_width = sysinfo_value("fb.width");
416 scr_height = sysinfo_value("fb.height");
417
418 if (sysinfo_value("fb.blinking")) {
419 ega_normal_color &= 0x77;
420 ega_inverted_color &= 0x77;
421 }
422
423 style = NORMAL_COLOR;
424
425 iospace_enable(task_get_id(), (void *) EGA_IO_BASE, 2);
426
427 sz = scr_width * scr_height * 2;
428 scr_addr = as_get_mappable_page(sz);
429
430 if (physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
431 PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE) != 0)
432 return -1;
433
434 async_set_client_connection(ega_client_connection);
435
436 return 0;
437}
438
439
440/**
441 * @}
442 */
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