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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / video / console / fbcon_ccw.c
blobbdf913ecf001de64916ede55b21c9b318743ee04
1 /*
2 * linux/drivers/video/console/fbcon_ccw.c -- Software Rotation - 270 degrees
3 *
4 * Copyright (C) 2005 Antonino Daplas <adaplas @pol.net>
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive for
8 * more details.
9 */
10
11 #include <linux/module.h>
12 #include <linux/string.h>
13 #include <linux/fb.h>
14 #include <linux/vt_kern.h>
15 #include <linux/console.h>
16 #include <asm/types.h>
17 #include "fbcon.h"
18 #include "fbcon_rotate.h"
19
20 /*
21 * Rotation 270 degrees
22 */
23
24 static inline void ccw_update_attr(u8 *dst, u8 *src, int attribute,
25 struct vc_data *vc)
26 {
27 int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2;
28 int width = (vc->vc_font.height + 7) >> 3;
29 int mod = vc->vc_font.height % 8;
30 u8 c, msk = ~(0xff << offset), msk1 = 0;
31
32 if (mod)
33 msk <<= (8 - mod);
34
35 if (offset > mod)
36 msk1 |= 0x01;
37
38 for (i = 0; i < vc->vc_font.width; i++) {
39 for (j = 0; j < width; j++) {
40 c = *src;
41
42 if (attribute & FBCON_ATTRIBUTE_UNDERLINE) {
43 if (j == width - 1)
44 c |= msk;
45
46 if (msk1 && j == width - 2)
47 c |= msk1;
48 }
49
50 if (attribute & FBCON_ATTRIBUTE_BOLD && i)
51 *(dst - width) |= c;
52
53 if (attribute & FBCON_ATTRIBUTE_REVERSE)
54 c = ~c;
55 src++;
56 *dst++ = c;
57 }
58 }
59 }
60
61
62 static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
63 int sx, int dy, int dx, int height, int width)
64 {
65 struct fbcon_ops *ops = info->fbcon_par;
66 struct fb_copyarea area;
67 u32 vyres = GETVYRES(ops->p->scrollmode, info);
68
69 area.sx = sy * vc->vc_font.height;
70 area.sy = vyres - ((sx + width) * vc->vc_font.width);
71 area.dx = dy * vc->vc_font.height;
72 area.dy = vyres - ((dx + width) * vc->vc_font.width);
73 area.width = height * vc->vc_font.height;
74 area.height = width * vc->vc_font.width;
75
76 info->fbops->fb_copyarea(info, &area);
77 }
78
79 static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
80 int sx, int height, int width)
81 {
82 struct fbcon_ops *ops = info->fbcon_par;
83 struct fb_fillrect region;
84 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
85 u32 vyres = GETVYRES(ops->p->scrollmode, info);
86
87 region.color = attr_bgcol_ec(bgshift,vc,info);
88 region.dx = sy * vc->vc_font.height;
89 region.dy = vyres - ((sx + width) * vc->vc_font.width);
90 region.height = width * vc->vc_font.width;
91 region.width = height * vc->vc_font.height;
92 region.rop = ROP_COPY;
93
94 info->fbops->fb_fillrect(info, &region);
95 }
96
97 static inline void ccw_putcs_aligned(struct vc_data *vc, struct fb_info *info,
98 const u16 *s, u32 attr, u32 cnt,
99 u32 d_pitch, u32 s_pitch, u32 cellsize,
100 struct fb_image *image, u8 *buf, u8 *dst)
101 {
102 struct fbcon_ops *ops = info->fbcon_par;
103 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
104 u32 idx = (vc->vc_font.height + 7) >> 3;
105 u8 *src;
106
107 while (cnt--) {
108 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
109
110 if (attr) {
111 ccw_update_attr(buf, src, attr, vc);
112 src = buf;
113 }
114
115 if (likely(idx == 1))
116 __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
117 vc->vc_font.width);
118 else
119 fb_pad_aligned_buffer(dst, d_pitch, src, idx,
120 vc->vc_font.width);
121
122 dst += d_pitch * vc->vc_font.width;
123 }
124
125 info->fbops->fb_imageblit(info, image);
126 }
127
128 static void ccw_putcs(struct vc_data *vc, struct fb_info *info,
129 const unsigned short *s, int count, int yy, int xx,
130 int fg, int bg)
131 {
132 struct fb_image image;
133 struct fbcon_ops *ops = info->fbcon_par;
134 u32 width = (vc->vc_font.height + 7)/8;
135 u32 cellsize = width * vc->vc_font.width;
136 u32 maxcnt = info->pixmap.size/cellsize;
137 u32 scan_align = info->pixmap.scan_align - 1;
138 u32 buf_align = info->pixmap.buf_align - 1;
139 u32 cnt, pitch, size;
140 u32 attribute = get_attribute(info, scr_readw(s));
141 u8 *dst, *buf = NULL;
142 u32 vyres = GETVYRES(ops->p->scrollmode, info);
143
144 if (!ops->fontbuffer)
145 return;
146
147 image.fg_color = fg;
148 image.bg_color = bg;
149 image.dx = yy * vc->vc_font.height;
150 image.dy = vyres - ((xx + count) * vc->vc_font.width);
151 image.width = vc->vc_font.height;
152 image.depth = 1;
153
154 if (attribute) {
155 buf = kmalloc(cellsize, GFP_KERNEL);
156 if (!buf)
157 return;
158 }
159
160 s += count - 1;
161
162 while (count) {
163 if (count > maxcnt)
164 cnt = maxcnt;
165 else
166 cnt = count;
167
168 image.height = vc->vc_font.width * cnt;
169 pitch = ((image.width + 7) >> 3) + scan_align;
170 pitch &= ~scan_align;
171 size = pitch * image.height + buf_align;
172 size &= ~buf_align;
173 dst = fb_get_buffer_offset(info, &info->pixmap, size);
174 image.data = dst;
175 ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
176 width, cellsize, &image, buf, dst);
177 image.dy += image.height;
178 count -= cnt;
179 s -= cnt;
180 }
181
182 /* buf is always NULL except when in monochrome mode, so in this case
183 it's a gain to check buf against NULL even though kfree() handles
184 NULL pointers just fine */
185 if (unlikely(buf))
186 kfree(buf);
187
188 }
189
190 static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info,
191 int bottom_only)
192 {
193 unsigned int cw = vc->vc_font.width;
194 unsigned int ch = vc->vc_font.height;
195 unsigned int rw = info->var.yres - (vc->vc_cols*cw);
196 unsigned int bh = info->var.xres - (vc->vc_rows*ch);
197 unsigned int bs = vc->vc_rows*ch;
198 struct fb_fillrect region;
199 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
200
201 region.color = attr_bgcol_ec(bgshift,vc,info);
202 region.rop = ROP_COPY;
203
204 if (rw && !bottom_only) {
205 region.dx = 0;
206 region.dy = info->var.yoffset;
207 region.height = rw;
208 region.width = info->var.xres_virtual;
209 info->fbops->fb_fillrect(info, &region);
210 }
211
212 if (bh) {
213 region.dx = info->var.xoffset + bs;
214 region.dy = 0;
215 region.height = info->var.yres_virtual;
216 region.width = bh;
217 info->fbops->fb_fillrect(info, &region);
218 }
219 }
220
221 static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
222 int softback_lines, int fg, int bg)
223 {
224 struct fb_cursor cursor;
225 struct fbcon_ops *ops = info->fbcon_par;
226 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
227 int w = (vc->vc_font.height + 7) >> 3, c;
228 int y = real_y(ops->p, vc->vc_y);
229 int attribute, use_sw = (vc->vc_cursor_type & 0x10);
230 int err = 1, dx, dy;
231 char *src;
232 u32 vyres = GETVYRES(ops->p->scrollmode, info);
233
234 if (!ops->fontbuffer)
235 return;
236
237 cursor.set = 0;
238
239 if (softback_lines) {
240 if (y + softback_lines >= vc->vc_rows) {
241 mode = CM_ERASE;
242 ops->cursor_flash = 0;
243 return;
244 } else
245 y += softback_lines;
246 }
247
248 c = scr_readw((u16 *) vc->vc_pos);
249 attribute = get_attribute(info, c);
250 src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
251
252 if (ops->cursor_state.image.data != src ||
253 ops->cursor_reset) {
254 ops->cursor_state.image.data = src;
255 cursor.set |= FB_CUR_SETIMAGE;
256 }
257
258 if (attribute) {
259 u8 *dst;
260
261 dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
262 if (!dst)
263 return;
264 kfree(ops->cursor_data);
265 ops->cursor_data = dst;
266 ccw_update_attr(dst, src, attribute, vc);
267 src = dst;
268 }
269
270 if (ops->cursor_state.image.fg_color != fg ||
271 ops->cursor_state.image.bg_color != bg ||
272 ops->cursor_reset) {
273 ops->cursor_state.image.fg_color = fg;
274 ops->cursor_state.image.bg_color = bg;
275 cursor.set |= FB_CUR_SETCMAP;
276 }
277
278 if (ops->cursor_state.image.height != vc->vc_font.width ||
279 ops->cursor_state.image.width != vc->vc_font.height ||
280 ops->cursor_reset) {
281 ops->cursor_state.image.height = vc->vc_font.width;
282 ops->cursor_state.image.width = vc->vc_font.height;
283 cursor.set |= FB_CUR_SETSIZE;
284 }
285
286 dx = y * vc->vc_font.height;
287 dy = vyres - ((vc->vc_x + 1) * vc->vc_font.width);
288
289 if (ops->cursor_state.image.dx != dx ||
290 ops->cursor_state.image.dy != dy ||
291 ops->cursor_reset) {
292 ops->cursor_state.image.dx = dx;
293 ops->cursor_state.image.dy = dy;
294 cursor.set |= FB_CUR_SETPOS;
295 }
296
297 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
298 ops->cursor_reset) {
299 ops->cursor_state.hot.x = cursor.hot.y = 0;
300 cursor.set |= FB_CUR_SETHOT;
301 }
302
303 if (cursor.set & FB_CUR_SETSIZE ||
304 vc->vc_cursor_type != ops->p->cursor_shape ||
305 ops->cursor_state.mask == NULL ||
306 ops->cursor_reset) {
307 char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
308 int cur_height, size, i = 0;
309 int width = (vc->vc_font.width + 7)/8;
310
311 if (!mask)
312 return;
313
314 tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
315
316 if (!tmp) {
317 kfree(mask);
318 return;
319 }
320
321 kfree(ops->cursor_state.mask);
322 ops->cursor_state.mask = mask;
323
324 ops->p->cursor_shape = vc->vc_cursor_type;
325 cursor.set |= FB_CUR_SETSHAPE;
326
327 switch (ops->p->cursor_shape & CUR_HWMASK) {
328 case CUR_NONE:
329 cur_height = 0;
330 break;
331 case CUR_UNDERLINE:
332 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
333 break;
334 case CUR_LOWER_THIRD:
335 cur_height = vc->vc_font.height/3;
336 break;
337 case CUR_LOWER_HALF:
338 cur_height = vc->vc_font.height >> 1;
339 break;
340 case CUR_TWO_THIRDS:
341 cur_height = (vc->vc_font.height << 1)/3;
342 break;
343 case CUR_BLOCK:
344 default:
345 cur_height = vc->vc_font.height;
346 break;
347 }
348
349 size = (vc->vc_font.height - cur_height) * width;
350 while (size--)
351 tmp[i++] = 0;
352 size = cur_height * width;
353 while (size--)
354 tmp[i++] = 0xff;
355 memset(mask, 0, w * vc->vc_font.width);
356 rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
357 kfree(tmp);
358 }
359
360 switch (mode) {
361 case CM_ERASE:
362 ops->cursor_state.enable = 0;
363 break;
364 case CM_DRAW:
365 case CM_MOVE:
366 default:
367 ops->cursor_state.enable = (use_sw) ? 0 : 1;
368 break;
369 }
370
371 cursor.image.data = src;
372 cursor.image.fg_color = ops->cursor_state.image.fg_color;
373 cursor.image.bg_color = ops->cursor_state.image.bg_color;
374 cursor.image.dx = ops->cursor_state.image.dx;
375 cursor.image.dy = ops->cursor_state.image.dy;
376 cursor.image.height = ops->cursor_state.image.height;
377 cursor.image.width = ops->cursor_state.image.width;
378 cursor.hot.x = ops->cursor_state.hot.x;
379 cursor.hot.y = ops->cursor_state.hot.y;
380 cursor.mask = ops->cursor_state.mask;
381 cursor.enable = ops->cursor_state.enable;
382 cursor.image.depth = 1;
383 cursor.rop = ROP_XOR;
384
385 if (info->fbops->fb_cursor)
386 err = info->fbops->fb_cursor(info, &cursor);
387
388 if (err)
389 soft_cursor(info, &cursor);
390
391 ops->cursor_reset = 0;
392 }
393
394 static int ccw_update_start(struct fb_info *info)
395 {
396 struct fbcon_ops *ops = info->fbcon_par;
397 u32 yoffset;
398 u32 vyres = GETVYRES(ops->p->scrollmode, info);
399 int err;
400
401 yoffset = (vyres - info->var.yres) - ops->var.xoffset;
402 ops->var.xoffset = ops->var.yoffset;
403 ops->var.yoffset = yoffset;
404 err = fb_pan_display(info, &ops->var);
405 ops->var.xoffset = info->var.xoffset;
406 ops->var.yoffset = info->var.yoffset;
407 ops->var.vmode = info->var.vmode;
408 return err;
409 }
410
411 void fbcon_rotate_ccw(struct fbcon_ops *ops)
412 {
413 ops->bmove = ccw_bmove;
414 ops->clear = ccw_clear;
415 ops->putcs = ccw_putcs;
416 ops->clear_margins = ccw_clear_margins;
417 ops->cursor = ccw_cursor;
418 ops->update_start = ccw_update_start;
419 }
420 EXPORT_SYMBOL(fbcon_rotate_ccw);
421
422 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
423 MODULE_DESCRIPTION("Console Rotation (270 degrees) Support");
424 MODULE_LICENSE("GPL");
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