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 u32 idx = vc->vc_font.width >> 3;
83 u8 *src;
84
85 while (cnt--) {
86 src = vc->vc_font.data + (scr_readw(s++)&
87 charmask)*cellsize;
88
89 if (attr) {
90 update_attr(buf, src, attr, vc);
91 src = buf;
92 }
93
94 if (likely(idx == 1))
95 __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
96 image->height);
97 else
98 fb_pad_aligned_buffer(dst, d_pitch, src, idx,
99 image->height);
100
101 dst += s_pitch;
102 }
103
104 info->fbops->fb_imageblit(info, image);
105 }
106
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)107 static inline void bit_putcs_unaligned(struct vc_data *vc,
108 struct fb_info *info, const u16 *s,
109 u32 attr, u32 cnt, u32 d_pitch,
110 u32 s_pitch, u32 cellsize,
111 struct fb_image *image, u8 *buf,
112 u8 *dst)
113 {
114 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
115 u32 shift_low = 0, mod = vc->vc_font.width % 8;
116 u32 shift_high = 8;
117 u32 idx = vc->vc_font.width >> 3;
118 u8 *src;
119
120 while (cnt--) {
121 src = vc->vc_font.data + (scr_readw(s++)&
122 charmask)*cellsize;
123
124 if (attr) {
125 update_attr(buf, src, attr, vc);
126 src = buf;
127 }
128
129 fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
130 image->height, shift_high,
131 shift_low, mod);
132 shift_low += mod;
133 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
134 shift_low &= 7;
135 shift_high = 8 - shift_low;
136 }
137
138 info->fbops->fb_imageblit(info, image);
139
140 }
141
bit_putcs(struct vc_data * vc,struct fb_info * info,const unsigned short * s,int count,int yy,int xx,int fg,int bg)142 static void bit_putcs(struct vc_data *vc, struct fb_info *info,
143 const unsigned short *s, int count, int yy, int xx,
144 int fg, int bg)
145 {
146 struct fb_image image;
147 u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);
148 u32 cellsize = width * vc->vc_font.height;
149 u32 maxcnt = info->pixmap.size/cellsize;
150 u32 scan_align = info->pixmap.scan_align - 1;
151 u32 buf_align = info->pixmap.buf_align - 1;
152 u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
153 u32 attribute = get_attribute(info, scr_readw(s));
154 u8 *dst, *buf = NULL;
155
156 image.fg_color = fg;
157 image.bg_color = bg;
158 image.dx = xx * vc->vc_font.width;
159 image.dy = yy * vc->vc_font.height;
160 image.height = vc->vc_font.height;
161 image.depth = 1;
162
163 if (attribute) {
164 buf = kmalloc(cellsize, GFP_ATOMIC);
165 if (!buf)
166 return;
167 }
168
169 while (count) {
170 if (count > maxcnt)
171 cnt = maxcnt;
172 else
173 cnt = count;
174
175 image.width = vc->vc_font.width * cnt;
176 pitch = DIV_ROUND_UP(image.width, 8) + scan_align;
177 pitch &= ~scan_align;
178 size = pitch * image.height + buf_align;
179 size &= ~buf_align;
180 dst = fb_get_buffer_offset(info, &info->pixmap, size);
181 image.data = dst;
182
183 if (!mod)
184 bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
185 width, cellsize, &image, buf, dst);
186 else
187 bit_putcs_unaligned(vc, info, s, attribute, cnt,
188 pitch, width, cellsize, &image,
189 buf, dst);
190
191 image.dx += cnt * vc->vc_font.width;
192 count -= cnt;
193 s += cnt;
194 }
195
196 /* buf is always NULL except when in monochrome mode, so in this case
197 it's a gain to check buf against NULL even though kfree() handles
198 NULL pointers just fine */
199 if (unlikely(buf))
200 kfree(buf);
201
202 }
203
bit_clear_margins(struct vc_data * vc,struct fb_info * info,int color,int bottom_only)204 static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
205 int color, int bottom_only)
206 {
207 unsigned int cw = vc->vc_font.width;
208 unsigned int ch = vc->vc_font.height;
209 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
210 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
211 unsigned int rs = info->var.xres - rw;
212 unsigned int bs = info->var.yres - bh;
213 struct fb_fillrect region;
214
215 region.color = color;
216 region.rop = ROP_COPY;
217
218 if ((int) rw > 0 && !bottom_only) {
219 region.dx = info->var.xoffset + rs;
220 region.dy = 0;
221 region.width = rw;
222 region.height = info->var.yres_virtual;
223 info->fbops->fb_fillrect(info, ®ion);
224 }
225
226 if ((int) bh > 0) {
227 region.dx = info->var.xoffset;
228 region.dy = info->var.yoffset + bs;
229 region.width = rs;
230 region.height = bh;
231 info->fbops->fb_fillrect(info, ®ion);
232 }
233 }
234
bit_cursor(struct vc_data * vc,struct fb_info * info,int mode,int fg,int bg)235 static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
236 int fg, int bg)
237 {
238 struct fb_cursor cursor;
239 struct fbcon_ops *ops = info->fbcon_par;
240 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
241 int w = DIV_ROUND_UP(vc->vc_font.width, 8), c;
242 int y = real_y(ops->p, vc->state.y);
243 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
244 int err = 1;
245 char *src;
246
247 cursor.set = 0;
248
249 if (!vc->vc_font.data)
250 return;
251
252 c = scr_readw((u16 *) vc->vc_pos);
253 attribute = get_attribute(info, c);
254 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
255
256 if (ops->cursor_state.image.data != src ||
257 ops->cursor_reset) {
258 ops->cursor_state.image.data = src;
259 cursor.set |= FB_CUR_SETIMAGE;
260 }
261
262 if (attribute) {
263 u8 *dst;
264
265 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
266 if (!dst)
267 return;
268 kfree(ops->cursor_data);
269 ops->cursor_data = dst;
270 update_attr(dst, src, attribute, vc);
271 src = dst;
272 }
273
274 if (ops->cursor_state.image.fg_color != fg ||
275 ops->cursor_state.image.bg_color != bg ||
276 ops->cursor_reset) {
277 ops->cursor_state.image.fg_color = fg;
278 ops->cursor_state.image.bg_color = bg;
279 cursor.set |= FB_CUR_SETCMAP;
280 }
281
282 if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) ||
283 (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
284 ops->cursor_reset) {
285 ops->cursor_state.image.dx = vc->vc_font.width * vc->state.x;
286 ops->cursor_state.image.dy = vc->vc_font.height * y;
287 cursor.set |= FB_CUR_SETPOS;
288 }
289
290 if (ops->cursor_state.image.height != vc->vc_font.height ||
291 ops->cursor_state.image.width != vc->vc_font.width ||
292 ops->cursor_reset) {
293 ops->cursor_state.image.height = vc->vc_font.height;
294 ops->cursor_state.image.width = vc->vc_font.width;
295 cursor.set |= FB_CUR_SETSIZE;
296 }
297
298 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
299 ops->cursor_reset) {
300 ops->cursor_state.hot.x = cursor.hot.y = 0;
301 cursor.set |= FB_CUR_SETHOT;
302 }
303
304 if (cursor.set & FB_CUR_SETSIZE ||
305 vc->vc_cursor_type != ops->p->cursor_shape ||
306 ops->cursor_state.mask == NULL ||
307 ops->cursor_reset) {
308 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
309 int cur_height, size, i = 0;
310 u8 msk = 0xff;
311
312 if (!mask)
313 return;
314
315 kfree(ops->cursor_state.mask);
316 ops->cursor_state.mask = mask;
317
318 ops->p->cursor_shape = vc->vc_cursor_type;
319 cursor.set |= FB_CUR_SETSHAPE;
320
321 switch (CUR_SIZE(ops->p->cursor_shape)) {
322 case CUR_NONE:
323 cur_height = 0;
324 break;
325 case CUR_UNDERLINE:
326 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
327 break;
328 case CUR_LOWER_THIRD:
329 cur_height = vc->vc_font.height/3;
330 break;
331 case CUR_LOWER_HALF:
332 cur_height = vc->vc_font.height >> 1;
333 break;
334 case CUR_TWO_THIRDS:
335 cur_height = (vc->vc_font.height << 1)/3;
336 break;
337 case CUR_BLOCK:
338 default:
339 cur_height = vc->vc_font.height;
340 break;
341 }
342 size = (vc->vc_font.height - cur_height) * w;
343 while (size--)
344 mask[i++] = ~msk;
345 size = cur_height * w;
346 while (size--)
347 mask[i++] = msk;
348 }
349
350 switch (mode) {
351 case CM_ERASE:
352 ops->cursor_state.enable = 0;
353 break;
354 case CM_DRAW:
355 case CM_MOVE:
356 default:
357 ops->cursor_state.enable = (use_sw) ? 0 : 1;
358 break;
359 }
360
361 cursor.image.data = src;
362 cursor.image.fg_color = ops->cursor_state.image.fg_color;
363 cursor.image.bg_color = ops->cursor_state.image.bg_color;
364 cursor.image.dx = ops->cursor_state.image.dx;
365 cursor.image.dy = ops->cursor_state.image.dy;
366 cursor.image.height = ops->cursor_state.image.height;
367 cursor.image.width = ops->cursor_state.image.width;
368 cursor.hot.x = ops->cursor_state.hot.x;
369 cursor.hot.y = ops->cursor_state.hot.y;
370 cursor.mask = ops->cursor_state.mask;
371 cursor.enable = ops->cursor_state.enable;
372 cursor.image.depth = 1;
373 cursor.rop = ROP_XOR;
374
375 if (info->fbops->fb_cursor)
376 err = info->fbops->fb_cursor(info, &cursor);
377
378 if (err)
379 soft_cursor(info, &cursor);
380
381 ops->cursor_reset = 0;
382 }
383
bit_update_start(struct fb_info * info)384 static int bit_update_start(struct fb_info *info)
385 {
386 struct fbcon_ops *ops = info->fbcon_par;
387 int err;
388
389 err = fb_pan_display(info, &ops->var);
390 ops->var.xoffset = info->var.xoffset;
391 ops->var.yoffset = info->var.yoffset;
392 ops->var.vmode = info->var.vmode;
393 return err;
394 }
395
fbcon_set_bitops(struct fbcon_ops * ops)396 void fbcon_set_bitops(struct fbcon_ops *ops)
397 {
398 ops->bmove = bit_bmove;
399 ops->clear = bit_clear;
400 ops->putcs = bit_putcs;
401 ops->clear_margins = bit_clear_margins;
402 ops->cursor = bit_cursor;
403 ops->update_start = bit_update_start;
404 ops->rotate_font = NULL;
405
406 if (ops->rotate)
407 fbcon_set_rotate(ops);
408 }
409