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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / video / console / bitblit.c
blob69864b1b3f9ee149aa7f2adbf2676574d09c8d49
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/string.h>
15 #include <linux/fb.h>
16 #include <linux/vt_kern.h>
17 #include <linux/console.h>
18 #include <asm/types.h>
19 #include "fbcon.h"
20
21 /*
22 * Accelerated handlers.
23 */
24 static inline void update_attr(u8 *dst, u8 *src, int attribute,
25 struct vc_data *vc)
26 {
27 int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
28 int width = (vc->vc_font.width + 7) >> 3;
29 unsigned int cellsize = vc->vc_font.height * width;
30 u8 c;
31
32 offset = cellsize - (offset * width);
33 for (i = 0; i < cellsize; i++) {
34 c = src[i];
35 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
36 c = 0xff;
37 if (attribute & FBCON_ATTRIBUTE_BOLD)
38 c |= c >> 1;
39 if (attribute & FBCON_ATTRIBUTE_REVERSE)
40 c = ~c;
41 dst[i] = c;
42 }
43 }
44
45 static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
46 int sx, int dy, int dx, int height, int width)
47 {
48 struct fb_copyarea area;
49
50 area.sx = sx * vc->vc_font.width;
51 area.sy = sy * vc->vc_font.height;
52 area.dx = dx * vc->vc_font.width;
53 area.dy = dy * vc->vc_font.height;
54 area.height = height * vc->vc_font.height;
55 area.width = width * vc->vc_font.width;
56
57 info->fbops->fb_copyarea(info, &area);
58 }
59
60 static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
61 int sx, int height, int width)
62 {
63 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
64 struct fb_fillrect region;
65
66 region.color = attr_bgcol_ec(bgshift, vc, info);
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, &region);
74 }
75
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
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
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 = (vc->vc_font.width + 7)/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_KERNEL);
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 = ((image.width + 7) >> 3) + 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
204 static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
205 int bottom_only)
206 {
207 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
208 unsigned int cw = vc->vc_font.width;
209 unsigned int ch = vc->vc_font.height;
210 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
211 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
212 unsigned int rs = info->var.xres - rw;
213 unsigned int bs = info->var.yres - bh;
214 struct fb_fillrect region;
215
216 region.color = attr_bgcol_ec(bgshift, vc, info);
217 region.rop = ROP_COPY;
218
219 if (rw && !bottom_only) {
220 region.dx = info->var.xoffset + rs;
221 region.dy = 0;
222 region.width = rw;
223 region.height = info->var.yres_virtual;
224 info->fbops->fb_fillrect(info, &region);
225 }
226
227 if (bh) {
228 region.dx = info->var.xoffset;
229 region.dy = info->var.yoffset + bs;
230 region.width = rs;
231 region.height = bh;
232 info->fbops->fb_fillrect(info, &region);
233 }
234 }
235
236 static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
237 int softback_lines, int fg, int bg)
238 {
239 struct fb_cursor cursor;
240 struct fbcon_ops *ops = info->fbcon_par;
241 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
242 int w = (vc->vc_font.width + 7) >> 3, c;
243 int y = real_y(ops->p, vc->vc_y);
244 int attribute, use_sw = (vc->vc_cursor_type & 0x10);
245 int err = 1;
246 char *src;
247
248 cursor.set = 0;
249
250 if (softback_lines) {
251 if (y + softback_lines >= vc->vc_rows) {
252 mode = CM_ERASE;
253 ops->cursor_flash = 0;
254 return;
255 } else
256 y += softback_lines;
257 }
258
259 c = scr_readw((u16 *) vc->vc_pos);
260 attribute = get_attribute(info, c);
261 src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
262
263 if (ops->cursor_state.image.data != src ||
264 ops->cursor_reset) {
265 ops->cursor_state.image.data = src;
266 cursor.set |= FB_CUR_SETIMAGE;
267 }
268
269 if (attribute) {
270 u8 *dst;
271
272 dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
273 if (!dst)
274 return;
275 kfree(ops->cursor_data);
276 ops->cursor_data = dst;
277 update_attr(dst, src, attribute, vc);
278 src = dst;
279 }
280
281 if (ops->cursor_state.image.fg_color != fg ||
282 ops->cursor_state.image.bg_color != bg ||
283 ops->cursor_reset) {
284 ops->cursor_state.image.fg_color = fg;
285 ops->cursor_state.image.bg_color = bg;
286 cursor.set |= FB_CUR_SETCMAP;
287 }
288
289 if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->vc_x)) ||
290 (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
291 ops->cursor_reset) {
292 ops->cursor_state.image.dx = vc->vc_font.width * vc->vc_x;
293 ops->cursor_state.image.dy = vc->vc_font.height * y;
294 cursor.set |= FB_CUR_SETPOS;
295 }
296
297 if (ops->cursor_state.image.height != vc->vc_font.height ||
298 ops->cursor_state.image.width != vc->vc_font.width ||
299 ops->cursor_reset) {
300 ops->cursor_state.image.height = vc->vc_font.height;
301 ops->cursor_state.image.width = vc->vc_font.width;
302 cursor.set |= FB_CUR_SETSIZE;
303 }
304
305 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
306 ops->cursor_reset) {
307 ops->cursor_state.hot.x = cursor.hot.y = 0;
308 cursor.set |= FB_CUR_SETHOT;
309 }
310
311 if (cursor.set & FB_CUR_SETSIZE ||
312 vc->vc_cursor_type != ops->p->cursor_shape ||
313 ops->cursor_state.mask == NULL ||
314 ops->cursor_reset) {
315 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
316 int cur_height, size, i = 0;
317 u8 msk = 0xff;
318
319 if (!mask)
320 return;
321
322 kfree(ops->cursor_state.mask);
323 ops->cursor_state.mask = mask;
324
325 ops->p->cursor_shape = vc->vc_cursor_type;
326 cursor.set |= FB_CUR_SETSHAPE;
327
328 switch (ops->p->cursor_shape & CUR_HWMASK) {
329 case CUR_NONE:
330 cur_height = 0;
331 break;
332 case CUR_UNDERLINE:
333 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
334 break;
335 case CUR_LOWER_THIRD:
336 cur_height = vc->vc_font.height/3;
337 break;
338 case CUR_LOWER_HALF:
339 cur_height = vc->vc_font.height >> 1;
340 break;
341 case CUR_TWO_THIRDS:
342 cur_height = (vc->vc_font.height << 1)/3;
343 break;
344 case CUR_BLOCK:
345 default:
346 cur_height = vc->vc_font.height;
347 break;
348 }
349 size = (vc->vc_font.height - cur_height) * w;
350 while (size--)
351 mask[i++] = ~msk;
352 size = cur_height * w;
353 while (size--)
354 mask[i++] = msk;
355 }
356
357 switch (mode) {
358 case CM_ERASE:
359 ops->cursor_state.enable = 0;
360 break;
361 case CM_DRAW:
362 case CM_MOVE:
363 default:
364 ops->cursor_state.enable = (use_sw) ? 0 : 1;
365 break;
366 }
367
368 cursor.image.data = src;
369 cursor.image.fg_color = ops->cursor_state.image.fg_color;
370 cursor.image.bg_color = ops->cursor_state.image.bg_color;
371 cursor.image.dx = ops->cursor_state.image.dx;
372 cursor.image.dy = ops->cursor_state.image.dy;
373 cursor.image.height = ops->cursor_state.image.height;
374 cursor.image.width = ops->cursor_state.image.width;
375 cursor.hot.x = ops->cursor_state.hot.x;
376 cursor.hot.y = ops->cursor_state.hot.y;
377 cursor.mask = ops->cursor_state.mask;
378 cursor.enable = ops->cursor_state.enable;
379 cursor.image.depth = 1;
380 cursor.rop = ROP_XOR;
381
382 if (info->fbops->fb_cursor)
383 err = info->fbops->fb_cursor(info, &cursor);
384
385 if (err)
386 soft_cursor(info, &cursor);
387
388 ops->cursor_reset = 0;
389 }
390
391 static int bit_update_start(struct fb_info *info)
392 {
393 struct fbcon_ops *ops = info->fbcon_par;
394 int err;
395
396 err = fb_pan_display(info, &ops->var);
397 ops->var.xoffset = info->var.xoffset;
398 ops->var.yoffset = info->var.yoffset;
399 ops->var.vmode = info->var.vmode;
400 return err;
401 }
402
403 void fbcon_set_bitops(struct fbcon_ops *ops)
404 {
405 ops->bmove = bit_bmove;
406 ops->clear = bit_clear;
407 ops->putcs = bit_putcs;
408 ops->clear_margins = bit_clear_margins;
409 ops->cursor = bit_cursor;
410 ops->update_start = bit_update_start;
411 ops->rotate_font = NULL;
412
413 if (ops->rotate)
414 fbcon_set_rotate(ops);
415 }
416
417 EXPORT_SYMBOL(fbcon_set_bitops);
418
419 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
420 MODULE_DESCRIPTION("Bit Blitting Operation");
421 MODULE_LICENSE("GPL");
422
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