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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); |
294 |
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