Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/drivers/video/console/fbcon_ud.c -- Software Rotation - 180 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/slab.h>
13#include <linux/string.h>
14#include <linux/fb.h>
15#include <linux/vt_kern.h>
16#include <linux/console.h>
17#include <asm/types.h>
18#include "fbcon.h"
19#include "fbcon_rotate.h"
20
21/*
22 * Rotation 180 degrees
23 */
24
25static void ud_update_attr(u8 *dst, u8 *src, int attribute,
26 struct vc_data *vc)
27{
28 int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
29 int width = font_glyph_pitch(vc->vc_font.width);
30 unsigned int cellsize = vc->vc_font.height * width;
31 u8 c;
32
33 offset = offset * width;
34
35 for (i = 0; i < cellsize; i++) {
36 c = src[i];
37 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i < offset)
38 c = 0xff;
39 if (attribute & FBCON_ATTRIBUTE_BOLD)
40 c |= c << 1;
41 if (attribute & FBCON_ATTRIBUTE_REVERSE)
42 c = ~c;
43 dst[i] = c;
44 }
45}
46
47
48static void ud_bmove(struct vc_data *vc, struct fb_info *info, int sy,
49 int sx, int dy, int dx, int height, int width)
50{
51 struct fbcon_par *par = info->fbcon_par;
52 struct fb_copyarea area;
53 u32 vyres = GETVYRES(par->p, info);
54 u32 vxres = GETVXRES(par->p, info);
55
56 area.sy = vyres - ((sy + height) * vc->vc_font.height);
57 area.sx = vxres - ((sx + width) * vc->vc_font.width);
58 area.dy = vyres - ((dy + height) * vc->vc_font.height);
59 area.dx = vxres - ((dx + width) * vc->vc_font.width);
60 area.height = height * vc->vc_font.height;
61 area.width = width * vc->vc_font.width;
62
63 info->fbops->fb_copyarea(info, &area);
64}
65
66static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy,
67 int sx, int height, int width, int fg, int bg)
68{
69 struct fbcon_par *par = info->fbcon_par;
70 struct fb_fillrect region;
71 u32 vyres = GETVYRES(par->p, info);
72 u32 vxres = GETVXRES(par->p, info);
73
74 region.color = bg;
75 region.dy = vyres - ((sy + height) * vc->vc_font.height);
76 region.dx = vxres - ((sx + width) * vc->vc_font.width);
77 region.width = width * vc->vc_font.width;
78 region.height = height * vc->vc_font.height;
79 region.rop = ROP_COPY;
80
81 info->fbops->fb_fillrect(info, ®ion);
82}
83
84static inline void ud_putcs_aligned(struct vc_data *vc, struct fb_info *info,
85 const u16 *s, u32 attr, u32 cnt,
86 u32 d_pitch, u32 s_pitch, u32 cellsize,
87 struct fb_image *image, u8 *buf, u8 *dst)
88{
89 struct fbcon_par *par = info->fbcon_par;
90 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
91 u32 idx = vc->vc_font.width >> 3;
92 u8 *src;
93
94 while (cnt--) {
95 src = par->rotated.buf + (scr_readw(s--) & charmask) * cellsize;
96
97 if (attr) {
98 ud_update_attr(buf, src, attr, vc);
99 src = buf;
100 }
101
102 if (likely(idx == 1))
103 __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
104 image->height);
105 else
106 fb_pad_aligned_buffer(dst, d_pitch, src, idx,
107 image->height);
108
109 dst += s_pitch;
110 }
111
112 info->fbops->fb_imageblit(info, image);
113}
114
115static inline void ud_putcs_unaligned(struct vc_data *vc,
116 struct fb_info *info, const u16 *s,
117 u32 attr, u32 cnt, u32 d_pitch,
118 u32 s_pitch, u32 cellsize,
119 struct fb_image *image, u8 *buf,
120 u8 *dst)
121{
122 struct fbcon_par *par = info->fbcon_par;
123 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
124 u32 shift_low = 0, mod = vc->vc_font.width % 8;
125 u32 shift_high = 8;
126 u32 idx = vc->vc_font.width >> 3;
127 u8 *src;
128
129 while (cnt--) {
130 src = par->rotated.buf + (scr_readw(s--) & charmask) * cellsize;
131
132 if (attr) {
133 ud_update_attr(buf, src, attr, vc);
134 src = buf;
135 }
136
137 fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
138 image->height, shift_high,
139 shift_low, mod);
140 shift_low += mod;
141 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
142 shift_low &= 7;
143 shift_high = 8 - shift_low;
144 }
145
146 info->fbops->fb_imageblit(info, image);
147
148}
149
150static void ud_putcs(struct vc_data *vc, struct fb_info *info,
151 const unsigned short *s, int count, int yy, int xx,
152 int fg, int bg)
153{
154 struct fb_image image;
155 struct fbcon_par *par = info->fbcon_par;
156 u32 width = font_glyph_pitch(vc->vc_font.width);
157 u32 cellsize = width * vc->vc_font.height;
158 u32 maxcnt = info->pixmap.size/cellsize;
159 u32 scan_align = info->pixmap.scan_align - 1;
160 u32 buf_align = info->pixmap.buf_align - 1;
161 u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
162 u32 attribute = get_attribute(info, scr_readw(s));
163 u8 *dst, *buf = NULL;
164 u32 vyres = GETVYRES(par->p, info);
165 u32 vxres = GETVXRES(par->p, info);
166
167 if (!par->rotated.buf)
168 return;
169
170 image.fg_color = fg;
171 image.bg_color = bg;
172 image.dy = vyres - ((yy * vc->vc_font.height) + vc->vc_font.height);
173 image.dx = vxres - ((xx + count) * vc->vc_font.width);
174 image.height = vc->vc_font.height;
175 image.depth = 1;
176
177 if (attribute) {
178 buf = kmalloc(cellsize, GFP_KERNEL);
179 if (!buf)
180 return;
181 }
182
183 s += count - 1;
184
185 while (count) {
186 if (count > maxcnt)
187 cnt = maxcnt;
188 else
189 cnt = count;
190
191 image.width = vc->vc_font.width * cnt;
192 pitch = ((image.width + 7) >> 3) + scan_align;
193 pitch &= ~scan_align;
194 size = pitch * image.height + buf_align;
195 size &= ~buf_align;
196 dst = fb_get_buffer_offset(info, &info->pixmap, size);
197 image.data = dst;
198
199 if (!mod)
200 ud_putcs_aligned(vc, info, s, attribute, cnt, pitch,
201 width, cellsize, &image, buf, dst);
202 else
203 ud_putcs_unaligned(vc, info, s, attribute, cnt, pitch,
204 width, cellsize, &image,
205 buf, dst);
206
207 image.dx += image.width;
208 count -= cnt;
209 s -= cnt;
210 xx += cnt;
211 }
212
213 /* buf is always NULL except when in monochrome mode, so in this case
214 it's a gain to check buf against NULL even though kfree() handles
215 NULL pointers just fine */
216 if (unlikely(buf))
217 kfree(buf);
218
219}
220
221static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
222 int color, int bottom_only)
223{
224 unsigned int cw = vc->vc_font.width;
225 unsigned int ch = vc->vc_font.height;
226 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
227 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
228 struct fb_fillrect region;
229
230 region.color = color;
231 region.rop = ROP_COPY;
232
233 if ((int) rw > 0 && !bottom_only) {
234 region.dy = 0;
235 region.dx = info->var.xoffset;
236 region.width = rw;
237 region.height = info->var.yres_virtual;
238 info->fbops->fb_fillrect(info, ®ion);
239 }
240
241 if ((int) bh > 0) {
242 region.dy = info->var.yoffset;
243 region.dx = info->var.xoffset;
244 region.height = bh;
245 region.width = info->var.xres;
246 info->fbops->fb_fillrect(info, ®ion);
247 }
248}
249
250static void ud_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
251 int fg, int bg)
252{
253 struct fb_cursor cursor;
254 struct fbcon_par *par = info->fbcon_par;
255 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
256 int w = font_glyph_pitch(vc->vc_font.width);
257 int c;
258 int y = real_y(par->p, vc->state.y);
259 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
260 int err = 1, dx, dy;
261 char *src;
262 u32 vyres = GETVYRES(par->p, info);
263 u32 vxres = GETVXRES(par->p, info);
264
265 if (!par->rotated.buf)
266 return;
267
268 cursor.set = 0;
269
270 c = scr_readw((u16 *) vc->vc_pos);
271 attribute = get_attribute(info, c);
272 src = par->rotated.buf + ((c & charmask) * (w * vc->vc_font.height));
273
274 if (par->cursor_state.image.data != src ||
275 par->cursor_reset) {
276 par->cursor_state.image.data = src;
277 cursor.set |= FB_CUR_SETIMAGE;
278 }
279
280 if (attribute) {
281 u8 *dst;
282
283 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
284 if (!dst)
285 return;
286 kfree(par->cursor_data);
287 par->cursor_data = dst;
288 ud_update_attr(dst, src, attribute, vc);
289 src = dst;
290 }
291
292 if (par->cursor_state.image.fg_color != fg ||
293 par->cursor_state.image.bg_color != bg ||
294 par->cursor_reset) {
295 par->cursor_state.image.fg_color = fg;
296 par->cursor_state.image.bg_color = bg;
297 cursor.set |= FB_CUR_SETCMAP;
298 }
299
300 if (par->cursor_state.image.height != vc->vc_font.height ||
301 par->cursor_state.image.width != vc->vc_font.width ||
302 par->cursor_reset) {
303 par->cursor_state.image.height = vc->vc_font.height;
304 par->cursor_state.image.width = vc->vc_font.width;
305 cursor.set |= FB_CUR_SETSIZE;
306 }
307
308 dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height);
309 dx = vxres - ((vc->state.x * vc->vc_font.width) + vc->vc_font.width);
310
311 if (par->cursor_state.image.dx != dx ||
312 par->cursor_state.image.dy != dy ||
313 par->cursor_reset) {
314 par->cursor_state.image.dx = dx;
315 par->cursor_state.image.dy = dy;
316 cursor.set |= FB_CUR_SETPOS;
317 }
318
319 if (par->cursor_state.hot.x || par->cursor_state.hot.y ||
320 par->cursor_reset) {
321 par->cursor_state.hot.x = cursor.hot.y = 0;
322 cursor.set |= FB_CUR_SETHOT;
323 }
324
325 if (cursor.set & FB_CUR_SETSIZE ||
326 vc->vc_cursor_type != par->p->cursor_shape ||
327 par->cursor_state.mask == NULL ||
328 par->cursor_reset) {
329 unsigned char *tmp, *mask;
330
331 tmp = kmalloc_array(vc->vc_font.height, w, GFP_ATOMIC);
332 if (!tmp)
333 return;
334 fbcon_fill_cursor_mask(par, vc, tmp);
335
336 mask = kmalloc_array(vc->vc_font.height, w, GFP_ATOMIC);
337 if (!mask) {
338 kfree(tmp);
339 return;
340 }
341 font_glyph_rotate_180(tmp, vc->vc_font.width, vc->vc_font.height, mask);
342 kfree(tmp);
343
344 kfree(par->cursor_state.mask);
345 par->cursor_state.mask = (const char *)mask;
346
347 par->p->cursor_shape = vc->vc_cursor_type;
348 cursor.set |= FB_CUR_SETSHAPE;
349 }
350
351 par->cursor_state.enable = enable && !use_sw;
352
353 cursor.image.data = src;
354 cursor.image.fg_color = par->cursor_state.image.fg_color;
355 cursor.image.bg_color = par->cursor_state.image.bg_color;
356 cursor.image.dx = par->cursor_state.image.dx;
357 cursor.image.dy = par->cursor_state.image.dy;
358 cursor.image.height = par->cursor_state.image.height;
359 cursor.image.width = par->cursor_state.image.width;
360 cursor.hot.x = par->cursor_state.hot.x;
361 cursor.hot.y = par->cursor_state.hot.y;
362 cursor.mask = par->cursor_state.mask;
363 cursor.enable = par->cursor_state.enable;
364 cursor.image.depth = 1;
365 cursor.rop = ROP_XOR;
366
367 if (info->fbops->fb_cursor)
368 err = info->fbops->fb_cursor(info, &cursor);
369
370 if (err)
371 soft_cursor(info, &cursor);
372
373 par->cursor_reset = 0;
374}
375
376static int ud_update_start(struct fb_info *info)
377{
378 struct fbcon_par *par = info->fbcon_par;
379 int xoffset, yoffset;
380 u32 vyres = GETVYRES(par->p, info);
381 u32 vxres = GETVXRES(par->p, info);
382 int err;
383
384 xoffset = vxres - info->var.xres - par->var.xoffset;
385 yoffset = vyres - info->var.yres - par->var.yoffset;
386 if (yoffset < 0)
387 yoffset += vyres;
388 par->var.xoffset = xoffset;
389 par->var.yoffset = yoffset;
390 err = fb_pan_display(info, &par->var);
391 par->var.xoffset = info->var.xoffset;
392 par->var.yoffset = info->var.yoffset;
393 par->var.vmode = info->var.vmode;
394 return err;
395}
396
397static const struct fbcon_bitops ud_fbcon_bitops = {
398 .bmove = ud_bmove,
399 .clear = ud_clear,
400 .putcs = ud_putcs,
401 .clear_margins = ud_clear_margins,
402 .cursor = ud_cursor,
403 .update_start = ud_update_start,
404 .rotate_font = fbcon_rotate_font,
405};
406
407void fbcon_set_bitops_ud(struct fbcon_par *par)
408{
409 par->bitops = &ud_fbcon_bitops;
410}