aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/video/fbdev/atafb_iplan2p4.c
blob: bee0d89463f755a4fc7a22a4d37966e618d148cb (plain) (blame)
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
/*
 *  linux/drivers/video/iplan2p4.c -- Low level frame buffer operations for
 *				      interleaved bitplanes à la Atari (4
 *				      planes, 2 bytes interleave)
 *
 *	Created 5 Apr 1997 by Geert Uytterhoeven
 *
 *  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/setup.h>

#include "atafb.h"

#define BPL	4
#include "atafb_utils.h"

void atafb_iplan2p4_copyarea(struct fb_info *info, u_long next_line,
			     int sy, int sx, int dy, int dx,
			     int height, int width)
{
	/*  bmove() has to distinguish two major cases: If both, source and
	 *  destination, start at even addresses or both are at odd
	 *  addresses, just the first odd and last even column (if present)
	 *  require special treatment (memmove_col()). The rest between
	 *  then can be copied by normal operations, because all adjacent
	 *  bytes are affected and are to be stored in the same order.
	 *    The pathological case is when the move should go from an odd
	 *  address to an even or vice versa. Since the bytes in the plane
	 *  words must be assembled in new order, it seems wisest to make
	 *  all movements by memmove_col().
	 */

	u8 *src, *dst;
	u32 *s, *d;
	int w, l , i, j;
	u_int colsize;
	u_int upwards = (dy < sy) || (dy == sy && dx < sx);

	colsize = height;
	if (!((sx ^ dx) & 15)) {
		/* odd->odd or even->even */

		if (upwards) {
			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
			if (sx & 15) {
				memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
				src += BPL * 2;
				dst += BPL * 2;
				width -= 8;
			}
			w = width >> 4;
			if (w) {
				s = (u32 *)src;
				d = (u32 *)dst;
				w *= BPL / 2;
				l = next_line - w * 4;
				for (j = height; j > 0; j--) {
					for (i = w; i > 0; i--)
						*d++ = *s++;
					s = (u32 *)((u8 *)s + l);
					d = (u32 *)((u8 *)d + l);
				}
			}
			if (width & 15)
				memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
					      0xff00ff00, height, next_line - BPL * 2);
		} else {
			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);

			if ((sx + width) & 15) {
				src -= BPL * 2;
				dst -= BPL * 2;
				memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
				width -= 8;
			}
			w = width >> 4;
			if (w) {
				s = (u32 *)src;
				d = (u32 *)dst;
				w *= BPL / 2;
				l = next_line - w * 4;
				for (j = height; j > 0; j--) {
					for (i = w; i > 0; i--)
						*--d = *--s;
					s = (u32 *)((u8 *)s - l);
					d = (u32 *)((u8 *)d - l);
				}
			}
			if (sx & 15)
				memmove32_col(dst - (width - 16) / (8 / BPL),
					      src - (width - 16) / (8 / BPL),
					      0xff00ff, colsize, -next_line - BPL * 2);
		}
	} else {
		/* odd->even or even->odd */
		if (upwards) {
			u32 *src32, *dst32;
			u32 pval[4], v, v1, mask;
			int i, j, w, f;

			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);

			mask = 0xff00ff00;
			f = 0;
			w = width;
			if (sx & 15) {
				f = 1;
				w += 8;
			}
			if ((sx + width) & 15)
				f |= 2;
			w >>= 4;
			for (i = height; i; i--) {
				src32 = (u32 *)src;
				dst32 = (u32 *)dst;

				if (f & 1) {
					pval[0] = (*src32++ << 8) & mask;
					pval[1] = (*src32++ << 8) & mask;
				} else {
					pval[0] = dst32[0] & mask;
					pval[1] = dst32[1] & mask;
				}

				for (j = w; j > 0; j--) {
					v = *src32++;
					v1 = v & mask;
					*dst32++ = pval[0] | (v1 >> 8);
					pval[0] = (v ^ v1) << 8;
					v = *src32++;
					v1 = v & mask;
					*dst32++ = pval[1] | (v1 >> 8);
					pval[1] = (v ^ v1) << 8;
				}

				if (f & 2) {
					dst32[0] = (dst32[0] & mask) | pval[0];
					dst32[1] = (dst32[1] & mask) | pval[1];
				}

				src += next_line;
				dst += next_line;
			}
		} else {
			u32 *src32, *dst32;
			u32 pval[4], v, v1, mask;
			int i, j, w, f;

			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);

			mask = 0xff00ff;
			f = 0;
			w = width;
			if ((dx + width) & 15)
				f = 1;
			if (sx & 15) {
				f |= 2;
				w += 8;
			}
			w >>= 4;
			for (i = height; i; i--) {
				src32 = (u32 *)src;
				dst32 = (u32 *)dst;

				if (f & 1) {
					pval[0] = dst32[-1] & mask;
					pval[1] = dst32[-2] & mask;
				} else {
					pval[0] = (*--src32 >> 8) & mask;
					pval[1] = (*--src32 >> 8) & mask;
				}

				for (j = w; j > 0; j--) {
					v = *--src32;
					v1 = v & mask;
					*--dst32 = pval[0] | (v1 << 8);
					pval[0] = (v ^ v1) >> 8;
					v = *--src32;
					v1 = v & mask;
					*--dst32 = pval[1] | (v1 << 8);
					pval[1] = (v ^ v1) >> 8;
				}

				if (!(f & 2)) {
					dst32[-1] = (dst32[-1] & mask) | pval[0];
					dst32[-2] = (dst32[-2] & mask) | pval[1];
				}

				src -= next_line;
				dst -= next_line;
			}
		}
	}
}

void atafb_iplan2p4_fillrect(struct fb_info *info, u_long next_line, u32 color,
                             int sy, int sx, int height, int width)
{
	u32 *dest;
	int rows, i;
	u32 cval[4];

	dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));
	if (sx & 15) {
		u8 *dest8 = (u8 *)dest + 1;

		expand8_col2mask(color, cval);

		for (i = height; i; i--) {
			fill8_col(dest8, cval);
			dest8 += next_line;
		}
		dest += BPL / 2;
		width -= 8;
	}

	expand16_col2mask(color, cval);
	rows = width >> 4;
	if (rows) {
		u32 *d = dest;
		u32 off = next_line - rows * BPL * 2;
		for (i = height; i; i--) {
			d = fill16_col(d, rows, cval);
			d = (u32 *)((long)d + off);
		}
		dest += rows * BPL / 2;
		width &= 15;
	}

	if (width) {
		u8 *dest8 = (u8 *)dest;

		expand8_col2mask(color, cval);

		for (i = height; i; i--) {
			fill8_col(dest8, cval);
			dest8 += next_line;
		}
	}
}

void atafb_iplan2p4_linefill(struct fb_info *info, u_long next_line,
                             int dy, int dx, u32 width,
                             const u8 *data, u32 bgcolor, u32 fgcolor)
{
	u32 *dest;
	const u16 *data16;
	int rows;
	u32 fgm[4], bgm[4], m;

	dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));
	if (dx & 15) {
		fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);
		dest += BPL / 2;
		width -= 8;
	}

	if (width >= 16) {
		data16 = (const u16 *)data;
		expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);

		for (rows = width / 16; rows; rows--) {
			u16 d = *data16++;
			m = d | ((u32)d << 16);
			*dest++ = (m & fgm[0]) ^ bgm[0];
			*dest++ = (m & fgm[1]) ^ bgm[1];
		}

		data = (const u8 *)data16;
		width &= 15;
	}

	if (width)
		fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);
}

#ifdef MODULE
MODULE_LICENSE("GPL");

int init_module(void)
{
	return 0;
}

void cleanup_module(void)
{
}
#endif /* MODULE */


    /*
     *  Visible symbols for modules
     */

EXPORT_SYMBOL(atafb_iplan2p4_copyarea);
EXPORT_SYMBOL(atafb_iplan2p4_fillrect);
EXPORT_SYMBOL(atafb_iplan2p4_linefill);