summaryrefslogtreecommitdiffstats
path: root/drivers/video/fbdev/core/sysfillrect.c
blob: bcdcaeae6538c328cc2de4b2c48bbb6b5307959b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
/*
 *  Generic fillrect for frame buffers in system RAM with packed pixels of
 *  any depth.
 *
 *  Based almost entirely from cfbfillrect.c (which is based almost entirely
 *  on Geert Uytterhoeven's fillrect routine)
 *
 *      Copyright (C)  2007 Antonino Daplas <adaplas@pol.net>
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of this archive for
 *  more details.
 */
#include <linux/module.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <asm/types.h>
#include "fb_draw.h"

    /*
     *  Aligned pattern fill using 32/64-bit memory accesses
     */

static void
bitfill_aligned(struct fb_info *p, unsigned long *dst, int dst_idx,
		unsigned long pat, unsigned n, int bits)
{
	unsigned long first, last;

	if (!n)
		return;

	first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
	last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));

	if (dst_idx+n <= bits) {
		/* Single word */
		if (last)
			first &= last;
		*dst = comp(pat, *dst, first);
	} else {
		/* Multiple destination words */

		/* Leading bits */
 		if (first!= ~0UL) {
			*dst = comp(pat, *dst, first);
			dst++;
			n -= bits - dst_idx;
		}

		/* Main chunk */
		n /= bits;
		memset_l(dst, pat, n);
		dst += n;

		/* Trailing bits */
		if (last)
			*dst = comp(pat, *dst, last);
	}
}


    /*
     *  Unaligned generic pattern fill using 32/64-bit memory accesses
     *  The pattern must have been expanded to a full 32/64-bit value
     *  Left/right are the appropriate shifts to convert to the pattern to be
     *  used for the next 32/64-bit word
     */

static void
bitfill_unaligned(struct fb_info *p, unsigned long *dst, int dst_idx,
		  unsigned long pat, int left, int right, unsigned n, int bits)
{
	unsigned long first, last;

	if (!n)
		return;

	first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
	last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));

	if (dst_idx+n <= bits) {
		/* Single word */
		if (last)
			first &= last;
		*dst = comp(pat, *dst, first);
	} else {
		/* Multiple destination words */
		/* Leading bits */
		if (first) {
			*dst = comp(pat, *dst, first);
			dst++;
			pat = pat << left | pat >> right;
			n -= bits - dst_idx;
		}

		/* Main chunk */
		n /= bits;
		while (n >= 4) {
			*dst++ = pat;
			pat = pat << left | pat >> right;
			*dst++ = pat;
			pat = pat << left | pat >> right;
			*dst++ = pat;
			pat = pat << left | pat >> right;
			*dst++ = pat;
			pat = pat << left | pat >> right;
			n -= 4;
		}
		while (n--) {
			*dst++ = pat;
			pat = pat << left | pat >> right;
		}

		/* Trailing bits */
		if (last)
			*dst = comp(pat, *dst, last);
	}
}

    /*
     *  Aligned pattern invert using 32/64-bit memory accesses
     */
static void
bitfill_aligned_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
		    unsigned long pat, unsigned n, int bits)
{
	unsigned long val = pat;
	unsigned long first, last;

	if (!n)
		return;

	first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
	last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));

	if (dst_idx+n <= bits) {
		/* Single word */
		if (last)
			first &= last;
		*dst = comp(*dst ^ val, *dst, first);
	} else {
		/* Multiple destination words */
		/* Leading bits */
		if (first!=0UL) {
			*dst = comp(*dst ^ val, *dst, first);
			dst++;
			n -= bits - dst_idx;
		}

		/* Main chunk */
		n /= bits;
		while (n >= 8) {
			*dst++ ^= val;
			*dst++ ^= val;
			*dst++ ^= val;
			*dst++ ^= val;
			*dst++ ^= val;
			*dst++ ^= val;
			*dst++ ^= val;
			*dst++ ^= val;
			n -= 8;
		}
		while (n--)
			*dst++ ^= val;
		/* Trailing bits */
		if (last)
			*dst = comp(*dst ^ val, *dst, last);
	}
}


    /*
     *  Unaligned generic pattern invert using 32/64-bit memory accesses
     *  The pattern must have been expanded to a full 32/64-bit value
     *  Left/right are the appropriate shifts to convert to the pattern to be
     *  used for the next 32/64-bit word
     */

static void
bitfill_unaligned_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
		      unsigned long pat, int left, int right, unsigned n,
		      int bits)
{
	unsigned long first, last;

	if (!n)
		return;

	first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
	last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));

	if (dst_idx+n <= bits) {
		/* Single word */
		if (last)
			first &= last;
		*dst = comp(*dst ^ pat, *dst, first);
	} else {
		/* Multiple destination words */

		/* Leading bits */
		if (first != 0UL) {
			*dst = comp(*dst ^ pat, *dst, first);
			dst++;
			pat = pat << left | pat >> right;
			n -= bits - dst_idx;
		}

		/* Main chunk */
		n /= bits;
		while (n >= 4) {
			*dst++ ^= pat;
			pat = pat << left | pat >> right;
			*dst++ ^= pat;
			pat = pat << left | pat >> right;
			*dst++ ^= pat;
			pat = pat << left | pat >> right;
			*dst++ ^= pat;
			pat = pat << left | pat >> right;
			n -= 4;
		}
		while (n--) {
			*dst ^= pat;
			pat = pat << left | pat >> right;
		}

		/* Trailing bits */
		if (last)
			*dst = comp(*dst ^ pat, *dst, last);
	}
}

void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
{
	unsigned long pat, pat2, fg;
	unsigned long width = rect->width, height = rect->height;
	int bits = BITS_PER_LONG, bytes = bits >> 3;
	u32 bpp = p->var.bits_per_pixel;
	unsigned long *dst;
	int dst_idx, left;

	if (p->state != FBINFO_STATE_RUNNING)
		return;

	if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
	    p->fix.visual == FB_VISUAL_DIRECTCOLOR )
		fg = ((u32 *) (p->pseudo_palette))[rect->color];
	else
		fg = rect->color;

	pat = pixel_to_pat( bpp, fg);

	dst = (unsigned long *)((unsigned long)p->screen_base & ~(bytes-1));
	dst_idx = ((unsigned long)p->screen_base & (bytes - 1))*8;
	dst_idx += rect->dy*p->fix.line_length*8+rect->dx*bpp;
	/* FIXME For now we support 1-32 bpp only */
	left = bits % bpp;
	if (p->fbops->fb_sync)
		p->fbops->fb_sync(p);
	if (!left) {
		void (*fill_op32)(struct fb_info *p, unsigned long *dst,
				  int dst_idx, unsigned long pat, unsigned n,
				  int bits) = NULL;

		switch (rect->rop) {
		case ROP_XOR:
			fill_op32 = bitfill_aligned_rev;
			break;
		case ROP_COPY:
			fill_op32 = bitfill_aligned;
			break;
		default:
			printk( KERN_ERR "cfb_fillrect(): unknown rop, "
				"defaulting to ROP_COPY\n");
			fill_op32 = bitfill_aligned;
			break;
		}
		while (height--) {
			dst += dst_idx >> (ffs(bits) - 1);
			dst_idx &= (bits - 1);
			fill_op32(p, dst, dst_idx, pat, width*bpp, bits);
			dst_idx += p->fix.line_length*8;
		}
	} else {
		int right, r;
		void (*fill_op)(struct fb_info *p, unsigned long *dst,
				int dst_idx, unsigned long pat, int left,
				int right, unsigned n, int bits) = NULL;
#ifdef __LITTLE_ENDIAN
		right = left;
		left = bpp - right;
#else
		right = bpp - left;
#endif
		switch (rect->rop) {
		case ROP_XOR:
			fill_op = bitfill_unaligned_rev;
			break;
		case ROP_COPY:
			fill_op = bitfill_unaligned;
			break;
		default:
			printk(KERN_ERR "sys_fillrect(): unknown rop, "
				"defaulting to ROP_COPY\n");
			fill_op = bitfill_unaligned;
			break;
		}
		while (height--) {
			dst += dst_idx / bits;
			dst_idx &= (bits - 1);
			r = dst_idx % bpp;
			/* rotate pattern to the correct start position */
			pat2 = le_long_to_cpu(rolx(cpu_to_le_long(pat), r, bpp));
			fill_op(p, dst, dst_idx, pat2, left, right,
				width*bpp, bits);
			dst_idx += p->fix.line_length*8;
		}
	}
}

EXPORT_SYMBOL(sys_fillrect);

MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
MODULE_DESCRIPTION("Generic fill rectangle (sys-to-sys)");
MODULE_LICENSE("GPL");