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a1005012 MS |
1 | /* |
2 | * linux/drivers/video/iplan2p2.c -- Low level frame buffer operations for | |
3 | * interleaved bitplanes à la Atari (2 | |
4 | * planes, 2 bytes interleave) | |
5 | * | |
6 | * Created 5 Apr 1997 by Geert Uytterhoeven | |
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 | ||
17 | #include <asm/setup.h> | |
18 | ||
19 | #include "atafb.h" | |
20 | ||
21 | #define BPL 2 | |
22 | #include "atafb_utils.h" | |
23 | ||
24 | void atafb_iplan2p2_copyarea(struct fb_info *info, u_long next_line, | |
25 | int sy, int sx, int dy, int dx, | |
26 | int height, int width) | |
27 | { | |
28 | /* bmove() has to distinguish two major cases: If both, source and | |
29 | * destination, start at even addresses or both are at odd | |
30 | * addresses, just the first odd and last even column (if present) | |
31 | * require special treatment (memmove_col()). The rest between | |
32 | * then can be copied by normal operations, because all adjacent | |
33 | * bytes are affected and are to be stored in the same order. | |
34 | * The pathological case is when the move should go from an odd | |
35 | * address to an even or vice versa. Since the bytes in the plane | |
36 | * words must be assembled in new order, it seems wisest to make | |
37 | * all movements by memmove_col(). | |
38 | */ | |
39 | ||
40 | u8 *src, *dst; | |
41 | u32 *s, *d; | |
42 | int w, l , i, j; | |
43 | u_int colsize; | |
44 | u_int upwards = (dy < sy) || (dy == sy && dx < sx); | |
45 | ||
46 | colsize = height; | |
47 | if (!((sx ^ dx) & 15)) { | |
48 | /* odd->odd or even->even */ | |
49 | ||
50 | if (upwards) { | |
51 | src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL); | |
52 | dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL); | |
53 | if (sx & 15) { | |
54 | memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2); | |
55 | src += BPL * 2; | |
56 | dst += BPL * 2; | |
57 | width -= 8; | |
58 | } | |
59 | w = width >> 4; | |
60 | if (w) { | |
61 | s = (u32 *)src; | |
62 | d = (u32 *)dst; | |
63 | w *= BPL / 2; | |
64 | l = next_line - w * 4; | |
65 | for (j = height; j > 0; j--) { | |
66 | for (i = w; i > 0; i--) | |
67 | *d++ = *s++; | |
68 | s = (u32 *)((u8 *)s + l); | |
69 | d = (u32 *)((u8 *)d + l); | |
70 | } | |
71 | } | |
72 | if (width & 15) | |
73 | memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL), | |
74 | 0xff00ff00, height, next_line - BPL * 2); | |
75 | } else { | |
76 | src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL); | |
77 | dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL); | |
78 | ||
79 | if ((sx + width) & 15) { | |
80 | src -= BPL * 2; | |
81 | dst -= BPL * 2; | |
82 | memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2); | |
83 | width -= 8; | |
84 | } | |
85 | w = width >> 4; | |
86 | if (w) { | |
87 | s = (u32 *)src; | |
88 | d = (u32 *)dst; | |
89 | w *= BPL / 2; | |
90 | l = next_line - w * 4; | |
91 | for (j = height; j > 0; j--) { | |
92 | for (i = w; i > 0; i--) | |
93 | *--d = *--s; | |
94 | s = (u32 *)((u8 *)s - l); | |
95 | d = (u32 *)((u8 *)d - l); | |
96 | } | |
97 | } | |
98 | if (sx & 15) | |
99 | memmove32_col(dst - (width - 16) / (8 / BPL), | |
100 | src - (width - 16) / (8 / BPL), | |
101 | 0xff00ff, colsize, -next_line - BPL * 2); | |
102 | } | |
103 | } else { | |
104 | /* odd->even or even->odd */ | |
105 | if (upwards) { | |
106 | u32 *src32, *dst32; | |
107 | u32 pval[4], v, v1, mask; | |
108 | int i, j, w, f; | |
109 | ||
110 | src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL); | |
111 | dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL); | |
112 | ||
113 | mask = 0xff00ff00; | |
114 | f = 0; | |
115 | w = width; | |
116 | if (sx & 15) { | |
117 | f = 1; | |
118 | w += 8; | |
119 | } | |
120 | if ((sx + width) & 15) | |
121 | f |= 2; | |
122 | w >>= 4; | |
123 | for (i = height; i; i--) { | |
124 | src32 = (u32 *)src; | |
125 | dst32 = (u32 *)dst; | |
126 | ||
127 | if (f & 1) { | |
128 | pval[0] = (*src32++ << 8) & mask; | |
129 | } else { | |
130 | pval[0] = dst32[0] & mask; | |
131 | } | |
132 | ||
133 | for (j = w; j > 0; j--) { | |
134 | v = *src32++; | |
135 | v1 = v & mask; | |
136 | *dst32++ = pval[0] | (v1 >> 8); | |
137 | pval[0] = (v ^ v1) << 8; | |
138 | } | |
139 | ||
140 | if (f & 2) { | |
141 | dst32[0] = (dst32[0] & mask) | pval[0]; | |
142 | } | |
143 | ||
144 | src += next_line; | |
145 | dst += next_line; | |
146 | } | |
147 | } else { | |
148 | u32 *src32, *dst32; | |
149 | u32 pval[4], v, v1, mask; | |
150 | int i, j, w, f; | |
151 | ||
152 | src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL); | |
153 | dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL); | |
154 | ||
155 | mask = 0xff00ff; | |
156 | f = 0; | |
157 | w = width; | |
158 | if ((dx + width) & 15) | |
159 | f = 1; | |
160 | if (sx & 15) { | |
161 | f |= 2; | |
162 | w += 8; | |
163 | } | |
164 | w >>= 4; | |
165 | for (i = height; i; i--) { | |
166 | src32 = (u32 *)src; | |
167 | dst32 = (u32 *)dst; | |
168 | ||
169 | if (f & 1) { | |
170 | pval[0] = dst32[-1] & mask; | |
171 | } else { | |
172 | pval[0] = (*--src32 >> 8) & mask; | |
173 | } | |
174 | ||
175 | for (j = w; j > 0; j--) { | |
176 | v = *--src32; | |
177 | v1 = v & mask; | |
178 | *--dst32 = pval[0] | (v1 << 8); | |
179 | pval[0] = (v ^ v1) >> 8; | |
180 | } | |
181 | ||
182 | if (!(f & 2)) { | |
183 | dst32[-1] = (dst32[-1] & mask) | pval[0]; | |
184 | } | |
185 | ||
186 | src -= next_line; | |
187 | dst -= next_line; | |
188 | } | |
189 | } | |
190 | } | |
191 | } | |
192 | ||
193 | void atafb_iplan2p2_fillrect(struct fb_info *info, u_long next_line, u32 color, | |
194 | int sy, int sx, int height, int width) | |
195 | { | |
196 | u32 *dest; | |
197 | int rows, i; | |
198 | u32 cval[4]; | |
199 | ||
200 | dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL)); | |
201 | if (sx & 15) { | |
202 | u8 *dest8 = (u8 *)dest + 1; | |
203 | ||
204 | expand8_col2mask(color, cval); | |
205 | ||
206 | for (i = height; i; i--) { | |
207 | fill8_col(dest8, cval); | |
208 | dest8 += next_line; | |
209 | } | |
210 | dest += BPL / 2; | |
211 | width -= 8; | |
212 | } | |
213 | ||
214 | expand16_col2mask(color, cval); | |
215 | rows = width >> 4; | |
216 | if (rows) { | |
217 | u32 *d = dest; | |
218 | u32 off = next_line - rows * BPL * 2; | |
219 | for (i = height; i; i--) { | |
220 | d = fill16_col(d, rows, cval); | |
221 | d = (u32 *)((long)d + off); | |
222 | } | |
223 | dest += rows * BPL / 2; | |
224 | width &= 15; | |
225 | } | |
226 | ||
227 | if (width) { | |
228 | u8 *dest8 = (u8 *)dest; | |
229 | ||
230 | expand8_col2mask(color, cval); | |
231 | ||
232 | for (i = height; i; i--) { | |
233 | fill8_col(dest8, cval); | |
234 | dest8 += next_line; | |
235 | } | |
236 | } | |
237 | } | |
238 | ||
239 | void atafb_iplan2p2_linefill(struct fb_info *info, u_long next_line, | |
240 | int dy, int dx, u32 width, | |
241 | const u8 *data, u32 bgcolor, u32 fgcolor) | |
242 | { | |
243 | u32 *dest; | |
244 | const u16 *data16; | |
245 | int rows; | |
246 | u32 fgm[4], bgm[4], m; | |
247 | ||
248 | dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL)); | |
249 | if (dx & 15) { | |
250 | fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++); | |
251 | dest += BPL / 2; | |
252 | width -= 8; | |
253 | } | |
254 | ||
255 | if (width >= 16) { | |
256 | data16 = (const u16 *)data; | |
257 | expand16_2col2mask(fgcolor, bgcolor, fgm, bgm); | |
258 | ||
259 | for (rows = width / 16; rows; rows--) { | |
260 | u16 d = *data16++; | |
261 | m = d | ((u32)d << 16); | |
262 | *dest++ = (m & fgm[0]) ^ bgm[0]; | |
263 | } | |
264 | ||
265 | data = (const u8 *)data16; | |
266 | width &= 15; | |
267 | } | |
268 | ||
269 | if (width) | |
270 | fill8_2col((u8 *)dest, fgcolor, bgcolor, *data); | |
271 | } | |
272 | ||
273 | #ifdef MODULE | |
274 | MODULE_LICENSE("GPL"); | |
275 | ||
276 | int init_module(void) | |
277 | { | |
278 | return 0; | |
279 | } | |
280 | ||
281 | void cleanup_module(void) | |
282 | { | |
283 | } | |
284 | #endif /* MODULE */ | |
285 | ||
286 | ||
287 | /* | |
288 | * Visible symbols for modules | |
289 | */ | |
290 | ||
291 | EXPORT_SYMBOL(atafb_iplan2p2_copyarea); | |
292 | EXPORT_SYMBOL(atafb_iplan2p2_fillrect); | |
293 | EXPORT_SYMBOL(atafb_iplan2p2_linefill); |