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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / console / bitblit.c
blobb28a4b0e395e6ecb62efbf197bc375ae745d25b0
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/config.h>
14 #include <linux/module.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 */
25 #define FBCON_ATTRIBUTE_UNDERLINE 1
26 #define FBCON_ATTRIBUTE_REVERSE 2
27 #define FBCON_ATTRIBUTE_BOLD 4
28
29 static inline int real_y(struct display *p, int ypos)
30 {
31 int rows = p->vrows;
32
33 ypos += p->yscroll;
34 return ypos < rows ? ypos : ypos - rows;
35 }
36
37
38 static inline int get_attribute(struct fb_info *info, u16 c)
39 {
40 int attribute = 0;
41
42 if (fb_get_color_depth(&info->var) == 1) {
43 if (attr_underline(c))
44 attribute |= FBCON_ATTRIBUTE_UNDERLINE;
45 if (attr_reverse(c))
46 attribute |= FBCON_ATTRIBUTE_REVERSE;
47 if (attr_bold(c))
48 attribute |= FBCON_ATTRIBUTE_BOLD;
49 }
50
51 return attribute;
52 }
53
54 static inline void update_attr(u8 *dst, u8 *src, int attribute,
55 struct vc_data *vc)
56 {
57 int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
58 int width = (vc->vc_font.width + 7) >> 3;
59 unsigned int cellsize = vc->vc_font.height * width;
60 u8 c;
61
62 offset = cellsize - (offset * width);
63 for (i = 0; i < cellsize; i++) {
64 c = src[i];
65 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
66 c = 0xff;
67 if (attribute & FBCON_ATTRIBUTE_BOLD)
68 c |= c >> 1;
69 if (attribute & FBCON_ATTRIBUTE_REVERSE)
70 c = ~c;
71 dst[i] = c;
72 }
73 }
74
75 static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
76 int sx, int dy, int dx, int height, int width)
77 {
78 struct fb_copyarea area;
79
80 area.sx = sx * vc->vc_font.width;
81 area.sy = sy * vc->vc_font.height;
82 area.dx = dx * vc->vc_font.width;
83 area.dy = dy * vc->vc_font.height;
84 area.height = height * vc->vc_font.height;
85 area.width = width * vc->vc_font.width;
86
87 info->fbops->fb_copyarea(info, &area);
88 }
89
90 static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
91 int sx, int height, int width)
92 {
93 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
94 struct fb_fillrect region;
95
96 region.color = attr_bgcol_ec(bgshift, vc);
97 region.dx = sx * vc->vc_font.width;
98 region.dy = sy * vc->vc_font.height;
99 region.width = width * vc->vc_font.width;
100 region.height = height * vc->vc_font.height;
101 region.rop = ROP_COPY;
102
103 info->fbops->fb_fillrect(info, &region);
104 }
105
106 static void bit_putcs(struct vc_data *vc, struct fb_info *info,
107 const unsigned short *s, int count, int yy, int xx,
108 int fg, int bg)
109 {
110 void (*move_unaligned)(struct fb_info *info, struct fb_pixmap *buf,
111 u8 *dst, u32 d_pitch, u8 *src, u32 idx,
112 u32 height, u32 shift_high, u32 shift_low,
113 u32 mod);
114 void (*move_aligned)(struct fb_info *info, struct fb_pixmap *buf,
115 u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
116 u32 height);
117 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
118 unsigned int width = (vc->vc_font.width + 7) >> 3;
119 unsigned int cellsize = vc->vc_font.height * width;
120 unsigned int maxcnt = info->pixmap.size/cellsize;
121 unsigned int scan_align = info->pixmap.scan_align - 1;
122 unsigned int buf_align = info->pixmap.buf_align - 1;
123 unsigned int shift_low = 0, mod = vc->vc_font.width % 8;
124 unsigned int shift_high = 8, pitch, cnt, size, k;
125 unsigned int idx = vc->vc_font.width >> 3;
126 unsigned int attribute = get_attribute(info, scr_readw(s));
127 struct fb_image image;
128 u8 *src, *dst, *buf = NULL;
129
130 if (attribute) {
131 buf = kmalloc(cellsize, GFP_KERNEL);
132 if (!buf)
133 return;
134 }
135
136 image.fg_color = fg;
137 image.bg_color = bg;
138
139 image.dx = xx * vc->vc_font.width;
140 image.dy = yy * vc->vc_font.height;
141 image.height = vc->vc_font.height;
142 image.depth = 1;
143
144 if (info->pixmap.outbuf && info->pixmap.inbuf) {
145 move_aligned = fb_iomove_buf_aligned;
146 move_unaligned = fb_iomove_buf_unaligned;
147 } else {
148 move_aligned = fb_sysmove_buf_aligned;
149 move_unaligned = fb_sysmove_buf_unaligned;
150 }
151 while (count) {
152 if (count > maxcnt)
153 cnt = k = maxcnt;
154 else
155 cnt = k = count;
156
157 image.width = vc->vc_font.width * cnt;
158 pitch = ((image.width + 7) >> 3) + scan_align;
159 pitch &= ~scan_align;
160 size = pitch * image.height + buf_align;
161 size &= ~buf_align;
162 dst = fb_get_buffer_offset(info, &info->pixmap, size);
163 image.data = dst;
164 if (mod) {
165 while (k--) {
166 src = vc->vc_font.data + (scr_readw(s++)&
167 charmask)*cellsize;
168
169 if (attribute) {
170 update_attr(buf, src, attribute, vc);
171 src = buf;
172 }
173
174 move_unaligned(info, &info->pixmap, dst, pitch,
175 src, idx, image.height,
176 shift_high, shift_low, mod);
177 shift_low += mod;
178 dst += (shift_low >= 8) ? width : width - 1;
179 shift_low &= 7;
180 shift_high = 8 - shift_low;
181 }
182 } else {
183 while (k--) {
184 src = vc->vc_font.data + (scr_readw(s++)&
185 charmask)*cellsize;
186
187 if (attribute) {
188 update_attr(buf, src, attribute, vc);
189 src = buf;
190 }
191
192 move_aligned(info, &info->pixmap, dst, pitch,
193 src, idx, image.height);
194 dst += width;
195 }
196 }
197 info->fbops->fb_imageblit(info, &image);
198 image.dx += cnt * vc->vc_font.width;
199 count -= cnt;
200 }
201
202 /* buf is always NULL except when in monochrome mode, so in this case
203 it's a gain to check buf against NULL even though kfree() handles
204 NULL pointers just fine */
205 if (unlikely(buf))
206 kfree(buf);
207 }
208
209 static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
210 int bottom_only)
211 {
212 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
213 unsigned int cw = vc->vc_font.width;
214 unsigned int ch = vc->vc_font.height;
215 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
216 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
217 unsigned int rs = info->var.xres - rw;
218 unsigned int bs = info->var.yres - bh;
219 struct fb_fillrect region;
220
221 region.color = attr_bgcol_ec(bgshift, vc);
222 region.rop = ROP_COPY;
223
224 if (rw && !bottom_only) {
225 region.dx = info->var.xoffset + rs;
226 region.dy = 0;
227 region.width = rw;
228 region.height = info->var.yres_virtual;
229 info->fbops->fb_fillrect(info, &region);
230 }
231
232 if (bh) {
233 region.dx = info->var.xoffset;
234 region.dy = info->var.yoffset + bs;
235 region.width = rs;
236 region.height = bh;
237 info->fbops->fb_fillrect(info, &region);
238 }
239 }
240
241 static void bit_cursor(struct vc_data *vc, struct fb_info *info,
242 struct display *p, int mode, int softback_lines, int fg, int bg)
243 {
244 struct fb_cursor cursor;
245 struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
246 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
247 int w = (vc->vc_font.width + 7) >> 3, c;
248 int y = real_y(p, vc->vc_y);
249 int attribute, use_sw = (vc->vc_cursor_type & 0x10);
250 char *src;
251
252 cursor.set = 0;
253
254 if (softback_lines) {
255 if (y + softback_lines >= vc->vc_rows) {
256 mode = CM_ERASE;
257 ops->cursor_flash = 0;
258 return;
259 } else
260 y += softback_lines;
261 }
262
263 c = scr_readw((u16 *) vc->vc_pos);
264 attribute = get_attribute(info, c);
265 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
266
267 if (ops->cursor_state.image.data != src ||
268 ops->cursor_reset) {
269 ops->cursor_state.image.data = src;
270 cursor.set |= FB_CUR_SETIMAGE;
271 }
272
273 if (attribute) {
274 u8 *dst;
275
276 dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
277 if (!dst)
278 return;
279 kfree(ops->cursor_data);
280 ops->cursor_data = dst;
281 update_attr(dst, src, attribute, vc);
282 src = dst;
283 }
284
285 if (ops->cursor_state.image.fg_color != fg ||
286 ops->cursor_state.image.bg_color != bg ||
287 ops->cursor_reset) {
288 ops->cursor_state.image.fg_color = fg;
289 ops->cursor_state.image.bg_color = bg;
290 cursor.set |= FB_CUR_SETCMAP;
291 }
292
293 if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->vc_x)) ||
294 (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
295 ops->cursor_reset) {
296 ops->cursor_state.image.dx = vc->vc_font.width * vc->vc_x;
297 ops->cursor_state.image.dy = vc->vc_font.height * y;
298 cursor.set |= FB_CUR_SETPOS;
299 }
300
301 if (ops->cursor_state.image.height != vc->vc_font.height ||
302 ops->cursor_state.image.width != vc->vc_font.width ||
303 ops->cursor_reset) {
304 ops->cursor_state.image.height = vc->vc_font.height;
305 ops->cursor_state.image.width = vc->vc_font.width;
306 cursor.set |= FB_CUR_SETSIZE;
307 }
308
309 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
310 ops->cursor_reset) {
311 ops->cursor_state.hot.x = cursor.hot.y = 0;
312 cursor.set |= FB_CUR_SETHOT;
313 }
314
315 if (cursor.set & FB_CUR_SETSIZE ||
316 vc->vc_cursor_type != p->cursor_shape ||
317 ops->cursor_state.mask == NULL ||
318 ops->cursor_reset) {
319 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
320 int cur_height, size, i = 0;
321 u8 msk = 0xff;
322
323 if (!mask)
324 return;
325
326 kfree(ops->cursor_state.mask);
327 ops->cursor_state.mask = mask;
328
329 p->cursor_shape = vc->vc_cursor_type;
330 cursor.set |= FB_CUR_SETSHAPE;
331
332 switch (p->cursor_shape & CUR_HWMASK) {
333 case CUR_NONE:
334 cur_height = 0;
335 break;
336 case CUR_UNDERLINE:
337 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
338 break;
339 case CUR_LOWER_THIRD:
340 cur_height = vc->vc_font.height/3;
341 break;
342 case CUR_LOWER_HALF:
343 cur_height = vc->vc_font.height >> 1;
344 break;
345 case CUR_TWO_THIRDS:
346 cur_height = (vc->vc_font.height << 1)/3;
347 break;
348 case CUR_BLOCK:
349 default:
350 cur_height = vc->vc_font.height;
351 break;
352 }
353 size = (vc->vc_font.height - cur_height) * w;
354 while (size--)
355 mask[i++] = ~msk;
356 size = cur_height * w;
357 while (size--)
358 mask[i++] = msk;
359 }
360
361 switch (mode) {
362 case CM_ERASE:
363 ops->cursor_state.enable = 0;
364 break;
365 case CM_DRAW:
366 case CM_MOVE:
367 default:
368 ops->cursor_state.enable = (use_sw) ? 0 : 1;
369 break;
370 }
371
372 cursor.image.data = src;
373 cursor.image.fg_color = ops->cursor_state.image.fg_color;
374 cursor.image.bg_color = ops->cursor_state.image.bg_color;
375 cursor.image.dx = ops->cursor_state.image.dx;
376 cursor.image.dy = ops->cursor_state.image.dy;
377 cursor.image.height = ops->cursor_state.image.height;
378 cursor.image.width = ops->cursor_state.image.width;
379 cursor.hot.x = ops->cursor_state.hot.x;
380 cursor.hot.y = ops->cursor_state.hot.y;
381 cursor.mask = ops->cursor_state.mask;
382 cursor.enable = ops->cursor_state.enable;
383 cursor.image.depth = 1;
384 cursor.rop = ROP_XOR;
385
386 info->fbops->fb_cursor(info, &cursor);
387
388 ops->cursor_reset = 0;
389 }
390
391 void fbcon_set_bitops(struct fbcon_ops *ops)
392 {
393 ops->bmove = bit_bmove;
394 ops->clear = bit_clear;
395 ops->putcs = bit_putcs;
396 ops->clear_margins = bit_clear_margins;
397 ops->cursor = bit_cursor;
398 }
399
400 EXPORT_SYMBOL(fbcon_set_bitops);
401
402 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
403 MODULE_DESCRIPTION("Bit Blitting Operation");
404 MODULE_LICENSE("GPL");
405
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