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 (image.dy >= info->var.yres)
164 return;
165
166 image.height = min(image.height, info->var.yres - image.dy);
167
168 if (attribute) {
169 buf = kmalloc(cellsize, GFP_ATOMIC);
170 if (!buf)
171 return;
172 }
173
174 while (count) {
175 if (count > maxcnt)
176 cnt = maxcnt;
177 else
178 cnt = count;
179
180 image.width = vc->vc_font.width * cnt;
181
182 if (image.dx >= info->var.xres)
183 break;
184
185 if (image.dx + image.width > info->var.xres) {
186 image.width = info->var.xres - image.dx;
187 cnt = image.width / vc->vc_font.width;
188 if (cnt == 0)
189 break;
190 image.width = cnt * vc->vc_font.width;
191 }
192
193 pitch = DIV_ROUND_UP(image.width, 8) + scan_align;
194 pitch &= ~scan_align;
195 size = pitch * image.height + buf_align;
196 size &= ~buf_align;
197 dst = fb_get_buffer_offset(info, &info->pixmap, size);
198 image.data = dst;
199
200 if (!mod)
201 bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
202 width, cellsize, &image, buf, dst);
203 else
204 bit_putcs_unaligned(vc, info, s, attribute, cnt,
205 pitch, width, cellsize, &image,
206 buf, dst);
207
208 image.dx += cnt * vc->vc_font.width;
209 count -= cnt;
210 s += 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
bit_clear_margins(struct vc_data * vc,struct fb_info * info,int color,int bottom_only)221 static void bit_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 unsigned int rs = info->var.xres - rw;
229 unsigned int bs = info->var.yres - bh;
230 struct fb_fillrect region;
231
232 region.color = color;
233 region.rop = ROP_COPY;
234
235 if ((int) rw > 0 && !bottom_only) {
236 region.dx = info->var.xoffset + rs;
237 region.dy = 0;
238 region.width = rw;
239 region.height = info->var.yres_virtual;
240 info->fbops->fb_fillrect(info, ®ion);
241 }
242
243 if ((int) bh > 0) {
244 region.dx = info->var.xoffset;
245 region.dy = info->var.yoffset + bs;
246 region.width = rs;
247 region.height = bh;
248 info->fbops->fb_fillrect(info, ®ion);
249 }
250 }
251
bit_cursor(struct vc_data * vc,struct fb_info * info,bool enable,int fg,int bg)252 static void bit_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
253 int fg, int bg)
254 {
255 struct fb_cursor cursor;
256 struct fbcon_ops *ops = info->fbcon_par;
257 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
258 int w = DIV_ROUND_UP(vc->vc_font.width, 8), c;
259 int y = real_y(ops->p, vc->state.y);
260 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
261 int err = 1;
262 char *src;
263
264 cursor.set = 0;
265
266 if (!vc->vc_font.data)
267 return;
268
269 c = scr_readw((u16 *) vc->vc_pos);
270 attribute = get_attribute(info, c);
271 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
272
273 if (ops->cursor_state.image.data != src ||
274 ops->cursor_reset) {
275 ops->cursor_state.image.data = src;
276 cursor.set |= FB_CUR_SETIMAGE;
277 }
278
279 if (attribute) {
280 u8 *dst;
281
282 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
283 if (!dst)
284 return;
285 kfree(ops->cursor_data);
286 ops->cursor_data = dst;
287 update_attr(dst, src, attribute, vc);
288 src = dst;
289 }
290
291 if (ops->cursor_state.image.fg_color != fg ||
292 ops->cursor_state.image.bg_color != bg ||
293 ops->cursor_reset) {
294 ops->cursor_state.image.fg_color = fg;
295 ops->cursor_state.image.bg_color = bg;
296 cursor.set |= FB_CUR_SETCMAP;
297 }
298
299 if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) ||
300 (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
301 ops->cursor_reset) {
302 ops->cursor_state.image.dx = vc->vc_font.width * vc->state.x;
303 ops->cursor_state.image.dy = vc->vc_font.height * y;
304 cursor.set |= FB_CUR_SETPOS;
305 }
306
307 if (ops->cursor_state.image.height != vc->vc_font.height ||
308 ops->cursor_state.image.width != vc->vc_font.width ||
309 ops->cursor_reset) {
310 ops->cursor_state.image.height = vc->vc_font.height;
311 ops->cursor_state.image.width = vc->vc_font.width;
312 cursor.set |= FB_CUR_SETSIZE;
313 }
314
315 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
316 ops->cursor_reset) {
317 ops->cursor_state.hot.x = cursor.hot.y = 0;
318 cursor.set |= FB_CUR_SETHOT;
319 }
320
321 if (cursor.set & FB_CUR_SETSIZE ||
322 vc->vc_cursor_type != ops->p->cursor_shape ||
323 ops->cursor_state.mask == NULL ||
324 ops->cursor_reset) {
325 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
326 int cur_height, size, i = 0;
327 u8 msk = 0xff;
328
329 if (!mask)
330 return;
331
332 kfree(ops->cursor_state.mask);
333 ops->cursor_state.mask = mask;
334
335 ops->p->cursor_shape = vc->vc_cursor_type;
336 cursor.set |= FB_CUR_SETSHAPE;
337
338 switch (CUR_SIZE(ops->p->cursor_shape)) {
339 case CUR_NONE:
340 cur_height = 0;
341 break;
342 case CUR_UNDERLINE:
343 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
344 break;
345 case CUR_LOWER_THIRD:
346 cur_height = vc->vc_font.height/3;
347 break;
348 case CUR_LOWER_HALF:
349 cur_height = vc->vc_font.height >> 1;
350 break;
351 case CUR_TWO_THIRDS:
352 cur_height = (vc->vc_font.height << 1)/3;
353 break;
354 case CUR_BLOCK:
355 default:
356 cur_height = vc->vc_font.height;
357 break;
358 }
359 size = (vc->vc_font.height - cur_height) * w;
360 while (size--)
361 mask[i++] = ~msk;
362 size = cur_height * w;
363 while (size--)
364 mask[i++] = msk;
365 }
366
367 ops->cursor_state.enable = enable && !use_sw;
368
369 cursor.image.data = src;
370 cursor.image.fg_color = ops->cursor_state.image.fg_color;
371 cursor.image.bg_color = ops->cursor_state.image.bg_color;
372 cursor.image.dx = ops->cursor_state.image.dx;
373 cursor.image.dy = ops->cursor_state.image.dy;
374 cursor.image.height = ops->cursor_state.image.height;
375 cursor.image.width = ops->cursor_state.image.width;
376 cursor.hot.x = ops->cursor_state.hot.x;
377 cursor.hot.y = ops->cursor_state.hot.y;
378 cursor.mask = ops->cursor_state.mask;
379 cursor.enable = ops->cursor_state.enable;
380 cursor.image.depth = 1;
381 cursor.rop = ROP_XOR;
382
383 if (info->fbops->fb_cursor)
384 err = info->fbops->fb_cursor(info, &cursor);
385
386 if (err)
387 soft_cursor(info, &cursor);
388
389 ops->cursor_reset = 0;
390 }
391
bit_update_start(struct fb_info * info)392 static int bit_update_start(struct fb_info *info)
393 {
394 struct fbcon_ops *ops = info->fbcon_par;
395 int err;
396
397 err = fb_pan_display(info, &ops->var);
398 ops->var.xoffset = info->var.xoffset;
399 ops->var.yoffset = info->var.yoffset;
400 ops->var.vmode = info->var.vmode;
401 return err;
402 }
403
fbcon_set_bitops(struct fbcon_ops * ops)404 void fbcon_set_bitops(struct fbcon_ops *ops)
405 {
406 ops->bmove = bit_bmove;
407 ops->clear = bit_clear;
408 ops->putcs = bit_putcs;
409 ops->clear_margins = bit_clear_margins;
410 ops->cursor = bit_cursor;
411 ops->update_start = bit_update_start;
412 ops->rotate_font = NULL;
413
414 if (ops->rotate)
415 fbcon_set_rotate(ops);
416 }
417