1 /*
2 * linux/drivers/video/console/bitblit.c -- BitBlitting Operation
3 *
4 * Originally from the 'accel_*' routines in drivers/video/console/fbcon.c
5 *
6 * Copyright (C) 2004 Antonino Daplas <adaplas @pol.net>
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive for
10 * more details.
11 */
12
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/string.h>
16 #include <linux/fb.h>
17 #include <linux/vt_kern.h>
18 #include <linux/console.h>
19 #include <asm/types.h>
20 #include "fbcon.h"
21
22 /*
23 * Accelerated handlers.
24 */
update_attr(u8 * dst,u8 * src,int attribute,struct vc_data * vc)25 static void 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 = DIV_ROUND_UP(vc->vc_font.width, 8);
30 unsigned int cellsize = vc->vc_font.height * width;
31 u8 c;
32
33 offset = cellsize - (offset * width);
34 for (i = 0; i < cellsize; i++) {
35 c = src[i];
36 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
37 c = 0xff;
38 if (attribute & FBCON_ATTRIBUTE_BOLD)
39 c |= c >> 1;
40 if (attribute & FBCON_ATTRIBUTE_REVERSE)
41 c = ~c;
42 dst[i] = c;
43 }
44 }
45
bit_bmove(struct vc_data * vc,struct fb_info * info,int sy,int sx,int dy,int dx,int height,int width)46 static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
47 int sx, int dy, int dx, int height, int width)
48 {
49 struct fb_copyarea area;
50
51 area.sx = sx * vc->vc_font.width;
52 area.sy = sy * vc->vc_font.height;
53 area.dx = dx * vc->vc_font.width;
54 area.dy = dy * vc->vc_font.height;
55 area.height = height * vc->vc_font.height;
56 area.width = width * vc->vc_font.width;
57
58 info->fbops->fb_copyarea(info, &area);
59 }
60
bit_clear(struct vc_data * vc,struct fb_info * info,int sy,int sx,int height,int width,int fg,int bg)61 static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
62 int sx, int height, int width, int fg, int bg)
63 {
64 struct fb_fillrect region;
65
66 region.color = bg;
67 region.dx = sx * vc->vc_font.width;
68 region.dy = sy * vc->vc_font.height;
69 region.width = width * vc->vc_font.width;
70 region.height = height * vc->vc_font.height;
71 region.rop = ROP_COPY;
72
73 info->fbops->fb_fillrect(info, ®ion);
74 }
75
bit_putcs_aligned(struct vc_data * vc,struct fb_info * info,const u16 * s,u32 attr,u32 cnt,u32 d_pitch,u32 s_pitch,u32 cellsize,struct fb_image * image,u8 * buf,u8 * dst)76 static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,
77 const u16 *s, u32 attr, u32 cnt,
78 u32 d_pitch, u32 s_pitch, u32 cellsize,
79 struct fb_image *image, u8 *buf, u8 *dst)
80 {
81 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
82 unsigned int charcnt = vc->vc_font.charcount;
83 u32 idx = vc->vc_font.width >> 3;
84 u8 *src;
85
86 while (cnt--) {
87 u16 ch = scr_readw(s++) & charmask;
88
89 if (ch >= charcnt)
90 ch = 0;
91 src = vc->vc_font.data + (unsigned int)ch * cellsize;
92
93 if (attr) {
94 update_attr(buf, src, attr, vc);
95 src = buf;
96 }
97
98 if (likely(idx == 1))
99 __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
100 image->height);
101 else
102 fb_pad_aligned_buffer(dst, d_pitch, src, idx,
103 image->height);
104
105 dst += s_pitch;
106 }
107
108 info->fbops->fb_imageblit(info, image);
109 }
110
bit_putcs_unaligned(struct vc_data * vc,struct fb_info * info,const u16 * s,u32 attr,u32 cnt,u32 d_pitch,u32 s_pitch,u32 cellsize,struct fb_image * image,u8 * buf,u8 * dst)111 static inline void bit_putcs_unaligned(struct vc_data *vc,
112 struct fb_info *info, const u16 *s,
113 u32 attr, u32 cnt, u32 d_pitch,
114 u32 s_pitch, u32 cellsize,
115 struct fb_image *image, u8 *buf,
116 u8 *dst)
117 {
118 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
119 unsigned int charcnt = vc->vc_font.charcount;
120 u32 shift_low = 0, mod = vc->vc_font.width % 8;
121 u32 shift_high = 8;
122 u32 idx = vc->vc_font.width >> 3;
123 u8 *src;
124
125 while (cnt--) {
126 u16 ch = scr_readw(s++) & charmask;
127
128 if (ch >= charcnt)
129 ch = 0;
130 src = vc->vc_font.data + (unsigned int)ch * cellsize;
131
132 if (attr) {
133 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
bit_putcs(struct vc_data * vc,struct fb_info * info,const unsigned short * s,int count,int yy,int xx,int fg,int bg)150 static void bit_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 u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);
156 u32 cellsize = width * vc->vc_font.height;
157 u32 maxcnt = info->pixmap.size/cellsize;
158 u32 scan_align = info->pixmap.scan_align - 1;
159 u32 buf_align = info->pixmap.buf_align - 1;
160 u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
161 u32 attribute = get_attribute(info, scr_readw(s));
162 u8 *dst, *buf = NULL;
163
164 image.fg_color = fg;
165 image.bg_color = bg;
166 image.dx = xx * vc->vc_font.width;
167 image.dy = yy * vc->vc_font.height;
168 image.height = vc->vc_font.height;
169 image.depth = 1;
170
171 if (image.dy >= info->var.yres)
172 return;
173
174 image.height = min(image.height, info->var.yres - image.dy);
175
176 if (attribute) {
177 buf = kmalloc(cellsize, GFP_ATOMIC);
178 if (!buf)
179 return;
180 }
181
182 while (count) {
183 if (count > maxcnt)
184 cnt = maxcnt;
185 else
186 cnt = count;
187
188 image.width = vc->vc_font.width * cnt;
189
190 if (image.dx >= info->var.xres)
191 break;
192
193 if (image.dx + image.width > info->var.xres) {
194 image.width = info->var.xres - image.dx;
195 cnt = image.width / vc->vc_font.width;
196 if (cnt == 0)
197 break;
198 image.width = cnt * vc->vc_font.width;
199 }
200
201 pitch = DIV_ROUND_UP(image.width, 8) + scan_align;
202 pitch &= ~scan_align;
203 size = pitch * image.height + buf_align;
204 size &= ~buf_align;
205 dst = fb_get_buffer_offset(info, &info->pixmap, size);
206 image.data = dst;
207
208 if (!mod)
209 bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
210 width, cellsize, &image, buf, dst);
211 else
212 bit_putcs_unaligned(vc, info, s, attribute, cnt,
213 pitch, width, cellsize, &image,
214 buf, dst);
215
216 image.dx += cnt * vc->vc_font.width;
217 count -= cnt;
218 s += cnt;
219 }
220
221 /* buf is always NULL except when in monochrome mode, so in this case
222 it's a gain to check buf against NULL even though kfree() handles
223 NULL pointers just fine */
224 if (unlikely(buf))
225 kfree(buf);
226
227 }
228
bit_clear_margins(struct vc_data * vc,struct fb_info * info,int color,int bottom_only)229 static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
230 int color, int bottom_only)
231 {
232 unsigned int cw = vc->vc_font.width;
233 unsigned int ch = vc->vc_font.height;
234 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
235 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
236 unsigned int rs = info->var.xres - rw;
237 unsigned int bs = info->var.yres - bh;
238 struct fb_fillrect region;
239
240 region.color = color;
241 region.rop = ROP_COPY;
242
243 if ((int) rw > 0 && !bottom_only) {
244 region.dx = info->var.xoffset + rs;
245 region.dy = 0;
246 region.width = rw;
247 region.height = info->var.yres_virtual;
248 info->fbops->fb_fillrect(info, ®ion);
249 }
250
251 if ((int) bh > 0) {
252 region.dx = info->var.xoffset;
253 region.dy = info->var.yoffset + bs;
254 region.width = rs;
255 region.height = bh;
256 info->fbops->fb_fillrect(info, ®ion);
257 }
258 }
259
bit_cursor(struct vc_data * vc,struct fb_info * info,bool enable,int fg,int bg)260 static void bit_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
261 int fg, int bg)
262 {
263 struct fb_cursor cursor;
264 struct fbcon_ops *ops = info->fbcon_par;
265 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
266 int w = DIV_ROUND_UP(vc->vc_font.width, 8), c;
267 int y = real_y(ops->p, vc->state.y);
268 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
269 int err = 1;
270 char *src;
271
272 cursor.set = 0;
273
274 if (!vc->vc_font.data)
275 return;
276
277 c = scr_readw((u16 *) vc->vc_pos);
278 attribute = get_attribute(info, c);
279 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
280
281 if (ops->cursor_state.image.data != src ||
282 ops->cursor_reset) {
283 ops->cursor_state.image.data = src;
284 cursor.set |= FB_CUR_SETIMAGE;
285 }
286
287 if (attribute) {
288 u8 *dst;
289
290 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
291 if (!dst)
292 return;
293 kfree(ops->cursor_data);
294 ops->cursor_data = dst;
295 update_attr(dst, src, attribute, vc);
296 src = dst;
297 }
298
299 if (ops->cursor_state.image.fg_color != fg ||
300 ops->cursor_state.image.bg_color != bg ||
301 ops->cursor_reset) {
302 ops->cursor_state.image.fg_color = fg;
303 ops->cursor_state.image.bg_color = bg;
304 cursor.set |= FB_CUR_SETCMAP;
305 }
306
307 if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) ||
308 (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
309 ops->cursor_reset) {
310 ops->cursor_state.image.dx = vc->vc_font.width * vc->state.x;
311 ops->cursor_state.image.dy = vc->vc_font.height * y;
312 cursor.set |= FB_CUR_SETPOS;
313 }
314
315 if (ops->cursor_state.image.height != vc->vc_font.height ||
316 ops->cursor_state.image.width != vc->vc_font.width ||
317 ops->cursor_reset) {
318 ops->cursor_state.image.height = vc->vc_font.height;
319 ops->cursor_state.image.width = vc->vc_font.width;
320 cursor.set |= FB_CUR_SETSIZE;
321 }
322
323 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
324 ops->cursor_reset) {
325 ops->cursor_state.hot.x = cursor.hot.y = 0;
326 cursor.set |= FB_CUR_SETHOT;
327 }
328
329 if (cursor.set & FB_CUR_SETSIZE ||
330 vc->vc_cursor_type != ops->p->cursor_shape ||
331 ops->cursor_state.mask == NULL ||
332 ops->cursor_reset) {
333 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
334 int cur_height, size, i = 0;
335 u8 msk = 0xff;
336
337 if (!mask)
338 return;
339
340 kfree(ops->cursor_state.mask);
341 ops->cursor_state.mask = mask;
342
343 ops->p->cursor_shape = vc->vc_cursor_type;
344 cursor.set |= FB_CUR_SETSHAPE;
345
346 switch (CUR_SIZE(ops->p->cursor_shape)) {
347 case CUR_NONE:
348 cur_height = 0;
349 break;
350 case CUR_UNDERLINE:
351 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
352 break;
353 case CUR_LOWER_THIRD:
354 cur_height = vc->vc_font.height/3;
355 break;
356 case CUR_LOWER_HALF:
357 cur_height = vc->vc_font.height >> 1;
358 break;
359 case CUR_TWO_THIRDS:
360 cur_height = (vc->vc_font.height << 1)/3;
361 break;
362 case CUR_BLOCK:
363 default:
364 cur_height = vc->vc_font.height;
365 break;
366 }
367 size = (vc->vc_font.height - cur_height) * w;
368 while (size--)
369 mask[i++] = ~msk;
370 size = cur_height * w;
371 while (size--)
372 mask[i++] = msk;
373 }
374
375 ops->cursor_state.enable = enable && !use_sw;
376
377 cursor.image.data = src;
378 cursor.image.fg_color = ops->cursor_state.image.fg_color;
379 cursor.image.bg_color = ops->cursor_state.image.bg_color;
380 cursor.image.dx = ops->cursor_state.image.dx;
381 cursor.image.dy = ops->cursor_state.image.dy;
382 cursor.image.height = ops->cursor_state.image.height;
383 cursor.image.width = ops->cursor_state.image.width;
384 cursor.hot.x = ops->cursor_state.hot.x;
385 cursor.hot.y = ops->cursor_state.hot.y;
386 cursor.mask = ops->cursor_state.mask;
387 cursor.enable = ops->cursor_state.enable;
388 cursor.image.depth = 1;
389 cursor.rop = ROP_XOR;
390
391 if (info->fbops->fb_cursor)
392 err = info->fbops->fb_cursor(info, &cursor);
393
394 if (err)
395 soft_cursor(info, &cursor);
396
397 ops->cursor_reset = 0;
398 }
399
bit_update_start(struct fb_info * info)400 static int bit_update_start(struct fb_info *info)
401 {
402 struct fbcon_ops *ops = info->fbcon_par;
403 int err;
404
405 err = fb_pan_display(info, &ops->var);
406 ops->var.xoffset = info->var.xoffset;
407 ops->var.yoffset = info->var.yoffset;
408 ops->var.vmode = info->var.vmode;
409 return err;
410 }
411
fbcon_set_bitops(struct fbcon_ops * ops)412 void fbcon_set_bitops(struct fbcon_ops *ops)
413 {
414 ops->bmove = bit_bmove;
415 ops->clear = bit_clear;
416 ops->putcs = bit_putcs;
417 ops->clear_margins = bit_clear_margins;
418 ops->cursor = bit_cursor;
419 ops->update_start = bit_update_start;
420 ops->rotate_font = NULL;
421
422 if (ops->rotate)
423 fbcon_set_rotate(ops);
424 }
425