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_clear(struct vc_data * vc,struct fb_info * info,int sy,int sx,int height,int width)46 static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
47 int sx, int height, int width)
48 {
49 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
50 struct fb_fillrect region;
51
52 region.color = attr_bgcol_ec(bgshift, vc, info);
53 region.dx = sx * vc->vc_font.width;
54 region.dy = sy * vc->vc_font.height;
55 region.width = width * vc->vc_font.width;
56 region.height = height * vc->vc_font.height;
57 region.rop = ROP_COPY;
58
59 info->fbops->fb_fillrect(info, ®ion);
60 }
61
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)62 static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,
63 const u16 *s, u32 attr, u32 cnt,
64 u32 d_pitch, u32 s_pitch, u32 cellsize,
65 struct fb_image *image, u8 *buf, u8 *dst)
66 {
67 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
68 u32 idx = vc->vc_font.width >> 3;
69 u8 *src;
70
71 while (cnt--) {
72 src = vc->vc_font.data + (scr_readw(s++)&
73 charmask)*cellsize;
74
75 if (attr) {
76 update_attr(buf, src, attr, vc);
77 src = buf;
78 }
79
80 if (likely(idx == 1))
81 __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
82 image->height);
83 else
84 fb_pad_aligned_buffer(dst, d_pitch, src, idx,
85 image->height);
86
87 dst += s_pitch;
88 }
89
90 info->fbops->fb_imageblit(info, image);
91 }
92
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)93 static inline void bit_putcs_unaligned(struct vc_data *vc,
94 struct fb_info *info, const u16 *s,
95 u32 attr, u32 cnt, u32 d_pitch,
96 u32 s_pitch, u32 cellsize,
97 struct fb_image *image, u8 *buf,
98 u8 *dst)
99 {
100 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
101 u32 shift_low = 0, mod = vc->vc_font.width % 8;
102 u32 shift_high = 8;
103 u32 idx = vc->vc_font.width >> 3;
104 u8 *src;
105
106 while (cnt--) {
107 src = vc->vc_font.data + (scr_readw(s++)&
108 charmask)*cellsize;
109
110 if (attr) {
111 update_attr(buf, src, attr, vc);
112 src = buf;
113 }
114
115 fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
116 image->height, shift_high,
117 shift_low, mod);
118 shift_low += mod;
119 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
120 shift_low &= 7;
121 shift_high = 8 - shift_low;
122 }
123
124 info->fbops->fb_imageblit(info, image);
125
126 }
127
bit_putcs(struct vc_data * vc,struct fb_info * info,const unsigned short * s,int count,int yy,int xx,int fg,int bg)128 static void bit_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 u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);
134 u32 cellsize = width * vc->vc_font.height;
135 u32 maxcnt = info->pixmap.size/cellsize;
136 u32 scan_align = info->pixmap.scan_align - 1;
137 u32 buf_align = info->pixmap.buf_align - 1;
138 u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
139 u32 attribute = get_attribute(info, scr_readw(s));
140 u8 *dst, *buf = NULL;
141
142 image.fg_color = fg;
143 image.bg_color = bg;
144 image.dx = xx * vc->vc_font.width;
145 image.dy = yy * vc->vc_font.height;
146 image.height = vc->vc_font.height;
147 image.depth = 1;
148
149 if (attribute) {
150 buf = kmalloc(cellsize, GFP_ATOMIC);
151 if (!buf)
152 return;
153 }
154
155 while (count) {
156 if (count > maxcnt)
157 cnt = maxcnt;
158 else
159 cnt = count;
160
161 image.width = vc->vc_font.width * cnt;
162 pitch = DIV_ROUND_UP(image.width, 8) + scan_align;
163 pitch &= ~scan_align;
164 size = pitch * image.height + buf_align;
165 size &= ~buf_align;
166 dst = fb_get_buffer_offset(info, &info->pixmap, size);
167 image.data = dst;
168
169 if (!mod)
170 bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
171 width, cellsize, &image, buf, dst);
172 else
173 bit_putcs_unaligned(vc, info, s, attribute, cnt,
174 pitch, width, cellsize, &image,
175 buf, dst);
176
177 image.dx += cnt * vc->vc_font.width;
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
bit_clear_margins(struct vc_data * vc,struct fb_info * info,int color,int bottom_only)190 static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
191 int color, 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.xres - (vc->vc_cols*cw);
196 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
197 unsigned int rs = info->var.xres - rw;
198 unsigned int bs = info->var.yres - bh;
199 struct fb_fillrect region;
200
201 region.color = color;
202 region.rop = ROP_COPY;
203
204 if ((int) rw > 0 && !bottom_only) {
205 region.dx = info->var.xoffset + rs;
206 region.dy = 0;
207 region.width = rw;
208 region.height = info->var.yres_virtual;
209 info->fbops->fb_fillrect(info, ®ion);
210 }
211
212 if ((int) bh > 0) {
213 region.dx = info->var.xoffset;
214 region.dy = info->var.yoffset + bs;
215 region.width = rs;
216 region.height = bh;
217 info->fbops->fb_fillrect(info, ®ion);
218 }
219 }
220
bit_cursor(struct vc_data * vc,struct fb_info * info,int mode,int fg,int bg)221 static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
222 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 = DIV_ROUND_UP(vc->vc_font.width, 8), c;
228 int y = real_y(ops->p, vc->state.y);
229 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
230 int err = 1;
231 char *src;
232
233 cursor.set = 0;
234
235 c = scr_readw((u16 *) vc->vc_pos);
236 attribute = get_attribute(info, c);
237 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
238
239 if (ops->cursor_state.image.data != src ||
240 ops->cursor_reset) {
241 ops->cursor_state.image.data = src;
242 cursor.set |= FB_CUR_SETIMAGE;
243 }
244
245 if (attribute) {
246 u8 *dst;
247
248 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
249 if (!dst)
250 return;
251 kfree(ops->cursor_data);
252 ops->cursor_data = dst;
253 update_attr(dst, src, attribute, vc);
254 src = dst;
255 }
256
257 if (ops->cursor_state.image.fg_color != fg ||
258 ops->cursor_state.image.bg_color != bg ||
259 ops->cursor_reset) {
260 ops->cursor_state.image.fg_color = fg;
261 ops->cursor_state.image.bg_color = bg;
262 cursor.set |= FB_CUR_SETCMAP;
263 }
264
265 if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) ||
266 (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
267 ops->cursor_reset) {
268 ops->cursor_state.image.dx = vc->vc_font.width * vc->state.x;
269 ops->cursor_state.image.dy = vc->vc_font.height * y;
270 cursor.set |= FB_CUR_SETPOS;
271 }
272
273 if (ops->cursor_state.image.height != vc->vc_font.height ||
274 ops->cursor_state.image.width != vc->vc_font.width ||
275 ops->cursor_reset) {
276 ops->cursor_state.image.height = vc->vc_font.height;
277 ops->cursor_state.image.width = vc->vc_font.width;
278 cursor.set |= FB_CUR_SETSIZE;
279 }
280
281 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
282 ops->cursor_reset) {
283 ops->cursor_state.hot.x = cursor.hot.y = 0;
284 cursor.set |= FB_CUR_SETHOT;
285 }
286
287 if (cursor.set & FB_CUR_SETSIZE ||
288 vc->vc_cursor_type != ops->p->cursor_shape ||
289 ops->cursor_state.mask == NULL ||
290 ops->cursor_reset) {
291 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
292 int cur_height, size, i = 0;
293 u8 msk = 0xff;
294
295 if (!mask)
296 return;
297
298 kfree(ops->cursor_state.mask);
299 ops->cursor_state.mask = mask;
300
301 ops->p->cursor_shape = vc->vc_cursor_type;
302 cursor.set |= FB_CUR_SETSHAPE;
303
304 switch (CUR_SIZE(ops->p->cursor_shape)) {
305 case CUR_NONE:
306 cur_height = 0;
307 break;
308 case CUR_UNDERLINE:
309 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
310 break;
311 case CUR_LOWER_THIRD:
312 cur_height = vc->vc_font.height/3;
313 break;
314 case CUR_LOWER_HALF:
315 cur_height = vc->vc_font.height >> 1;
316 break;
317 case CUR_TWO_THIRDS:
318 cur_height = (vc->vc_font.height << 1)/3;
319 break;
320 case CUR_BLOCK:
321 default:
322 cur_height = vc->vc_font.height;
323 break;
324 }
325 size = (vc->vc_font.height - cur_height) * w;
326 while (size--)
327 mask[i++] = ~msk;
328 size = cur_height * w;
329 while (size--)
330 mask[i++] = msk;
331 }
332
333 switch (mode) {
334 case CM_ERASE:
335 ops->cursor_state.enable = 0;
336 break;
337 case CM_DRAW:
338 case CM_MOVE:
339 default:
340 ops->cursor_state.enable = (use_sw) ? 0 : 1;
341 break;
342 }
343
344 cursor.image.data = src;
345 cursor.image.fg_color = ops->cursor_state.image.fg_color;
346 cursor.image.bg_color = ops->cursor_state.image.bg_color;
347 cursor.image.dx = ops->cursor_state.image.dx;
348 cursor.image.dy = ops->cursor_state.image.dy;
349 cursor.image.height = ops->cursor_state.image.height;
350 cursor.image.width = ops->cursor_state.image.width;
351 cursor.hot.x = ops->cursor_state.hot.x;
352 cursor.hot.y = ops->cursor_state.hot.y;
353 cursor.mask = ops->cursor_state.mask;
354 cursor.enable = ops->cursor_state.enable;
355 cursor.image.depth = 1;
356 cursor.rop = ROP_XOR;
357
358 if (info->fbops->fb_cursor)
359 err = info->fbops->fb_cursor(info, &cursor);
360
361 if (err)
362 soft_cursor(info, &cursor);
363
364 ops->cursor_reset = 0;
365 }
366
bit_update_start(struct fb_info * info)367 static int bit_update_start(struct fb_info *info)
368 {
369 struct fbcon_ops *ops = info->fbcon_par;
370 int err;
371
372 err = fb_pan_display(info, &ops->var);
373 ops->var.xoffset = info->var.xoffset;
374 ops->var.yoffset = info->var.yoffset;
375 ops->var.vmode = info->var.vmode;
376 return err;
377 }
378
fbcon_set_bitops(struct fbcon_ops * ops)379 void fbcon_set_bitops(struct fbcon_ops *ops)
380 {
381 ops->clear = bit_clear;
382 ops->putcs = bit_putcs;
383 ops->clear_margins = bit_clear_margins;
384 ops->cursor = bit_cursor;
385 ops->update_start = bit_update_start;
386 ops->rotate_font = NULL;
387
388 if (ops->rotate)
389 fbcon_set_rotate(ops);
390 }
391