fbcon_ccw.c

  1/*
  2 *  linux/drivers/video/console/fbcon_ccw.c -- Software Rotation - 270 degrees
  3 *
  4 *      Copyright (C) 2005 Antonino Daplas <adaplas @pol.net>
  5 *
  6 *  This file is subject to the terms and conditions of the GNU General Public
  7 *  License.  See the file COPYING in the main directory of this archive for
  8 *  more details.
  9 */
 10
 11#include <linux/module.h>
 12#include <linux/slab.h>
 13#include <linux/string.h>
 14#include <linux/fb.h>
 15#include <linux/vt_kern.h>
 16#include <linux/console.h>
 17#include <asm/types.h>
 18#include "fbcon.h"
 19#include "fbcon_rotate.h"
 20
 21/*
 22 * Rotation 270 degrees
 23 */
 24
 25static void ccw_update_attr(u8 *dst, u8 *src, int attribute,
 26				  struct vc_data *vc)
 27{
 28	int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2;
 29	int width = (vc->vc_font.height + 7) >> 3;
 30	int mod = vc->vc_font.height % 8;
 31	u8 c, msk = ~(0xff << offset), msk1 = 0;
 32
 33	if (mod)
 34		msk <<= (8 - mod);
 35
 36	if (offset > mod)
 37		msk1 |= 0x01;
 38
 39	for (i = 0; i < vc->vc_font.width; i++) {
 40		for (j = 0; j < width; j++) {
 41			c = *src;
 42
 43			if (attribute & FBCON_ATTRIBUTE_UNDERLINE) {
 44				if (j == width - 1)
 45					c |= msk;
 46
 47				if (msk1 && j == width - 2)
 48					c |= msk1;
 49			}
 50
 51			if (attribute & FBCON_ATTRIBUTE_BOLD && i)
 52				*(dst - width) |= c;
 53
 54			if (attribute & FBCON_ATTRIBUTE_REVERSE)
 55				c = ~c;
 56			src++;
 57			*dst++ = c;
 58		}
 59	}
 60}
 61
 62
 63static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
 64		     int sx, int dy, int dx, int height, int width)
 65{
 66	struct fbcon_par *par = info->fbcon_par;
 67	struct fb_copyarea area;
 68	u32 vyres = GETVYRES(par->p, info);
 69
 70	area.sx = sy * vc->vc_font.height;
 71	area.sy = vyres - ((sx + width) * vc->vc_font.width);
 72	area.dx = dy * vc->vc_font.height;
 73	area.dy = vyres - ((dx + width) * vc->vc_font.width);
 74	area.width = height * vc->vc_font.height;
 75	area.height  = width * vc->vc_font.width;
 76
 77	info->fbops->fb_copyarea(info, &area);
 78}
 79
 80static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
 81		     int sx, int height, int width, int fg, int bg)
 82{
 83	struct fbcon_par *par = info->fbcon_par;
 84	struct fb_fillrect region;
 85	u32 vyres = GETVYRES(par->p, info);
 86
 87	region.color = bg;
 88	region.dx = sy * vc->vc_font.height;
 89	region.dy = vyres - ((sx + width) * vc->vc_font.width);
 90	region.height = width * vc->vc_font.width;
 91	region.width = height * vc->vc_font.height;
 92	region.rop = ROP_COPY;
 93
 94	info->fbops->fb_fillrect(info, &region);
 95}
 96
 97static inline void ccw_putcs_aligned(struct vc_data *vc, struct fb_info *info,
 98				    const u16 *s, u32 attr, u32 cnt,
 99				    u32 d_pitch, u32 s_pitch, u32 cellsize,
100				    struct fb_image *image, u8 *buf, u8 *dst)
101{
102	struct fbcon_par *par = info->fbcon_par;
103	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
104	u32 idx = (vc->vc_font.height + 7) >> 3;
105	u8 *src;
106
107	while (cnt--) {
108		src = par->fontbuffer + (scr_readw(s--) & charmask) * cellsize;
109
110		if (attr) {
111			ccw_update_attr(buf, src, attr, vc);
112			src = buf;
113		}
114
115		if (likely(idx == 1))
116			__fb_pad_aligned_buffer(dst, d_pitch, src, idx,
117						vc->vc_font.width);
118		else
119			fb_pad_aligned_buffer(dst, d_pitch, src, idx,
120					      vc->vc_font.width);
121
122		dst += d_pitch * vc->vc_font.width;
123	}
124
125	info->fbops->fb_imageblit(info, image);
126}
127
128static void ccw_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	struct fbcon_par *par = info->fbcon_par;
134	u32 width = (vc->vc_font.height + 7)/8;
135	u32 cellsize = width * vc->vc_font.width;
136	u32 maxcnt = info->pixmap.size/cellsize;
137	u32 scan_align = info->pixmap.scan_align - 1;
138	u32 buf_align = info->pixmap.buf_align - 1;
139	u32 cnt, pitch, size;
140	u32 attribute = get_attribute(info, scr_readw(s));
141	u8 *dst, *buf = NULL;
142	u32 vyres = GETVYRES(par->p, info);
143
144	if (!par->fontbuffer)
145		return;
146
147	image.fg_color = fg;
148	image.bg_color = bg;
149	image.dx = yy * vc->vc_font.height;
150	image.dy = vyres - ((xx + count) * vc->vc_font.width);
151	image.width = vc->vc_font.height;
152	image.depth = 1;
153
154	if (attribute) {
155		buf = kmalloc(cellsize, GFP_KERNEL);
156		if (!buf)
157			return;
158	}
159
160	s += count - 1;
161
162	while (count) {
163		if (count > maxcnt)
164			cnt = maxcnt;
165		else
166			cnt = count;
167
168		image.height = vc->vc_font.width * cnt;
169		pitch = ((image.width + 7) >> 3) + scan_align;
170		pitch &= ~scan_align;
171		size = pitch * image.height + buf_align;
172		size &= ~buf_align;
173		dst = fb_get_buffer_offset(info, &info->pixmap, size);
174		image.data = dst;
175		ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
176				 width, cellsize, &image, buf, dst);
177		image.dy += image.height;
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
190static void ccw_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.yres - (vc->vc_cols*cw);
196	unsigned int bh = info->var.xres - (vc->vc_rows*ch);
197	unsigned int bs = vc->vc_rows*ch;
198	struct fb_fillrect region;
199
200	region.color = color;
201	region.rop = ROP_COPY;
202
203	if ((int) rw > 0 && !bottom_only) {
204		region.dx = 0;
205		region.dy = info->var.yoffset;
206		region.height = rw;
207		region.width = info->var.xres_virtual;
208		info->fbops->fb_fillrect(info, &region);
209	}
210
211	if ((int) bh > 0) {
212		region.dx = info->var.xoffset + bs;
213		region.dy = 0;
214                region.height = info->var.yres_virtual;
215                region.width = bh;
216		info->fbops->fb_fillrect(info, &region);
217	}
218}
219
220static void ccw_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
221		       int fg, int bg)
222{
223	struct fb_cursor cursor;
224	struct fbcon_par *par = info->fbcon_par;
225	unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
226	int w = (vc->vc_font.height + 7) >> 3, c;
227	int y = real_y(par->p, vc->state.y);
228	int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
229	int err = 1, dx, dy;
230	char *src;
231	u32 vyres = GETVYRES(par->p, info);
232
233	if (!par->fontbuffer)
234		return;
235
236	cursor.set = 0;
237
238 	c = scr_readw((u16 *) vc->vc_pos);
239	attribute = get_attribute(info, c);
240	src = par->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
241
242	if (par->cursor_state.image.data != src ||
243	    par->cursor_reset) {
244		par->cursor_state.image.data = src;
245		cursor.set |= FB_CUR_SETIMAGE;
246	}
247
248	if (attribute) {
249		u8 *dst;
250
251		dst = kmalloc_array(w, vc->vc_font.width, GFP_ATOMIC);
252		if (!dst)
253			return;
254		kfree(par->cursor_data);
255		par->cursor_data = dst;
256		ccw_update_attr(dst, src, attribute, vc);
257		src = dst;
258	}
259
260	if (par->cursor_state.image.fg_color != fg ||
261	    par->cursor_state.image.bg_color != bg ||
262	    par->cursor_reset) {
263		par->cursor_state.image.fg_color = fg;
264		par->cursor_state.image.bg_color = bg;
265		cursor.set |= FB_CUR_SETCMAP;
266	}
267
268	if (par->cursor_state.image.height != vc->vc_font.width ||
269	    par->cursor_state.image.width != vc->vc_font.height ||
270	    par->cursor_reset) {
271		par->cursor_state.image.height = vc->vc_font.width;
272		par->cursor_state.image.width = vc->vc_font.height;
273		cursor.set |= FB_CUR_SETSIZE;
274	}
275
276	dx = y * vc->vc_font.height;
277	dy = vyres - ((vc->state.x + 1) * vc->vc_font.width);
278
279	if (par->cursor_state.image.dx != dx ||
280	    par->cursor_state.image.dy != dy ||
281	    par->cursor_reset) {
282		par->cursor_state.image.dx = dx;
283		par->cursor_state.image.dy = dy;
284		cursor.set |= FB_CUR_SETPOS;
285	}
286
287	if (par->cursor_state.hot.x || par->cursor_state.hot.y ||
288	    par->cursor_reset) {
289		par->cursor_state.hot.x = cursor.hot.y = 0;
290		cursor.set |= FB_CUR_SETHOT;
291	}
292
293	if (cursor.set & FB_CUR_SETSIZE ||
294	    vc->vc_cursor_type != par->p->cursor_shape ||
295	    par->cursor_state.mask == NULL ||
296	    par->cursor_reset) {
297		char *tmp, *mask = kmalloc_array(w, vc->vc_font.width,
298						 GFP_ATOMIC);
299		int cur_height, size, i = 0;
300		int width = (vc->vc_font.width + 7)/8;
301
302		if (!mask)
303			return;
304
305		tmp = kmalloc_array(width, vc->vc_font.height, GFP_ATOMIC);
306
307		if (!tmp) {
308			kfree(mask);
309			return;
310		}
311
312		kfree(par->cursor_state.mask);
313		par->cursor_state.mask = mask;
314
315		par->p->cursor_shape = vc->vc_cursor_type;
316		cursor.set |= FB_CUR_SETSHAPE;
317
318		switch (CUR_SIZE(par->p->cursor_shape)) {
319		case CUR_NONE:
320			cur_height = 0;
321			break;
322		case CUR_UNDERLINE:
323			cur_height = (vc->vc_font.height < 10) ? 1 : 2;
324			break;
325		case CUR_LOWER_THIRD:
326			cur_height = vc->vc_font.height/3;
327			break;
328		case CUR_LOWER_HALF:
329			cur_height = vc->vc_font.height >> 1;
330			break;
331		case CUR_TWO_THIRDS:
332			cur_height = (vc->vc_font.height << 1)/3;
333			break;
334		case CUR_BLOCK:
335		default:
336			cur_height = vc->vc_font.height;
337			break;
338		}
339
340		size = (vc->vc_font.height - cur_height) * width;
341		while (size--)
342			tmp[i++] = 0;
343		size = cur_height * width;
344		while (size--)
345			tmp[i++] = 0xff;
346		memset(mask, 0, w * vc->vc_font.width);
347		rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
348		kfree(tmp);
349	}
350
351	par->cursor_state.enable = enable && !use_sw;
352
353	cursor.image.data = src;
354	cursor.image.fg_color = par->cursor_state.image.fg_color;
355	cursor.image.bg_color = par->cursor_state.image.bg_color;
356	cursor.image.dx = par->cursor_state.image.dx;
357	cursor.image.dy = par->cursor_state.image.dy;
358	cursor.image.height = par->cursor_state.image.height;
359	cursor.image.width = par->cursor_state.image.width;
360	cursor.hot.x = par->cursor_state.hot.x;
361	cursor.hot.y = par->cursor_state.hot.y;
362	cursor.mask = par->cursor_state.mask;
363	cursor.enable = par->cursor_state.enable;
364	cursor.image.depth = 1;
365	cursor.rop = ROP_XOR;
366
367	if (info->fbops->fb_cursor)
368		err = info->fbops->fb_cursor(info, &cursor);
369
370	if (err)
371		soft_cursor(info, &cursor);
372
373	par->cursor_reset = 0;
374}
375
376static int ccw_update_start(struct fb_info *info)
377{
378	struct fbcon_par *par = info->fbcon_par;
379	u32 yoffset;
380	u32 vyres = GETVYRES(par->p, info);
381	int err;
382
383	yoffset = (vyres - info->var.yres) - par->var.xoffset;
384	par->var.xoffset = par->var.yoffset;
385	par->var.yoffset = yoffset;
386	err = fb_pan_display(info, &par->var);
387	par->var.xoffset = info->var.xoffset;
388	par->var.yoffset = info->var.yoffset;
389	par->var.vmode = info->var.vmode;
390	return err;
391}
392
393static const struct fbcon_bitops ccw_fbcon_bitops = {
394	.bmove = ccw_bmove,
395	.clear = ccw_clear,
396	.putcs = ccw_putcs,
397	.clear_margins = ccw_clear_margins,
398	.cursor = ccw_cursor,
399	.update_start = ccw_update_start,
400	.rotate_font = fbcon_rotate_font,
401};
402
403void fbcon_set_bitops_ccw(struct fbcon_par *par)
404{
405	par->bitops = &ccw_fbcon_bitops;
406}