2 * linux/drivers/video/iplan2p8.c -- Low level frame buffer operations for
3 * interleaved bitplanes à la Atari (8
4 * planes, 2 bytes interleave)
6 * Created 5 Apr 1997 by Geert Uytterhoeven
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
13 #include <linux/string.h>
16 #include <asm/setup.h>
21 #include "atafb_utils.h"
24 /* Copies a 8 plane column from 's', height 'h', to 'd'. */
26 /* This expands a 8 bit color into two longs for two movepl (8 plane)
30 void atafb_iplan2p8_copyarea(struct fb_info *info, u_long next_line,
31 int sy, int sx, int dy, int dx,
32 int height, int width)
34 /* bmove() has to distinguish two major cases: If both, source and
35 * destination, start at even addresses or both are at odd
36 * addresses, just the first odd and last even column (if present)
37 * require special treatment (memmove_col()). The rest between
38 * then can be copied by normal operations, because all adjacent
39 * bytes are affected and are to be stored in the same order.
40 * The pathological case is when the move should go from an odd
41 * address to an even or vice versa. Since the bytes in the plane
42 * words must be assembled in new order, it seems wisest to make
43 * all movements by memmove_col().
50 u_int upwards = (dy < sy) || (dy == sy && dx < sx);
53 if (!((sx ^ dx) & 15)) {
54 /* odd->odd or even->even */
57 src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
58 dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
60 memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
70 l = next_line - w * 4;
71 for (j = height; j > 0; j--) {
72 for (i = w; i > 0; i--)
74 s = (u32 *)((u8 *)s + l);
75 d = (u32 *)((u8 *)d + l);
79 memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
80 0xff00ff00, height, next_line - BPL * 2);
82 src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
83 dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
85 if ((sx + width) & 15) {
88 memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
96 l = next_line - w * 4;
97 for (j = height; j > 0; j--) {
98 for (i = w; i > 0; i--)
100 s = (u32 *)((u8 *)s - l);
101 d = (u32 *)((u8 *)d - l);
105 memmove32_col(dst - (width - 16) / (8 / BPL),
106 src - (width - 16) / (8 / BPL),
107 0xff00ff, colsize, -next_line - BPL * 2);
110 /* odd->even or even->odd */
113 u32 pval[4], v, v1, mask;
116 src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
117 dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
126 if ((sx + width) & 15)
129 for (i = height; i; i--) {
134 pval[0] = (*src32++ << 8) & mask;
135 pval[1] = (*src32++ << 8) & mask;
136 pval[2] = (*src32++ << 8) & mask;
137 pval[3] = (*src32++ << 8) & mask;
139 pval[0] = dst32[0] & mask;
140 pval[1] = dst32[1] & mask;
141 pval[2] = dst32[2] & mask;
142 pval[3] = dst32[3] & mask;
145 for (j = w; j > 0; j--) {
148 *dst32++ = pval[0] | (v1 >> 8);
149 pval[0] = (v ^ v1) << 8;
152 *dst32++ = pval[1] | (v1 >> 8);
153 pval[1] = (v ^ v1) << 8;
156 *dst32++ = pval[2] | (v1 >> 8);
157 pval[2] = (v ^ v1) << 8;
160 *dst32++ = pval[3] | (v1 >> 8);
161 pval[3] = (v ^ v1) << 8;
165 dst32[0] = (dst32[0] & mask) | pval[0];
166 dst32[1] = (dst32[1] & mask) | pval[1];
167 dst32[2] = (dst32[2] & mask) | pval[2];
168 dst32[3] = (dst32[3] & mask) | pval[3];
176 u32 pval[4], v, v1, mask;
179 src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
180 dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
185 if ((dx + width) & 15)
192 for (i = height; i; i--) {
197 pval[0] = dst32[-1] & mask;
198 pval[1] = dst32[-2] & mask;
199 pval[2] = dst32[-3] & mask;
200 pval[3] = dst32[-4] & mask;
202 pval[0] = (*--src32 >> 8) & mask;
203 pval[1] = (*--src32 >> 8) & mask;
204 pval[2] = (*--src32 >> 8) & mask;
205 pval[3] = (*--src32 >> 8) & mask;
208 for (j = w; j > 0; j--) {
211 *--dst32 = pval[0] | (v1 << 8);
212 pval[0] = (v ^ v1) >> 8;
215 *--dst32 = pval[1] | (v1 << 8);
216 pval[1] = (v ^ v1) >> 8;
219 *--dst32 = pval[2] | (v1 << 8);
220 pval[2] = (v ^ v1) >> 8;
223 *--dst32 = pval[3] | (v1 << 8);
224 pval[3] = (v ^ v1) >> 8;
228 dst32[-1] = (dst32[-1] & mask) | pval[0];
229 dst32[-2] = (dst32[-2] & mask) | pval[1];
230 dst32[-3] = (dst32[-3] & mask) | pval[2];
231 dst32[-4] = (dst32[-4] & mask) | pval[3];
241 void atafb_iplan2p8_fillrect(struct fb_info *info, u_long next_line, u32 color,
242 int sy, int sx, int height, int width)
248 dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));
250 u8 *dest8 = (u8 *)dest + 1;
252 expand8_col2mask(color, cval);
254 for (i = height; i; i--) {
255 fill8_col(dest8, cval);
262 expand16_col2mask(color, cval);
266 u32 off = next_line - rows * BPL * 2;
267 for (i = height; i; i--) {
268 d = fill16_col(d, rows, cval);
269 d = (u32 *)((long)d + off);
271 dest += rows * BPL / 2;
276 u8 *dest8 = (u8 *)dest;
278 expand8_col2mask(color, cval);
280 for (i = height; i; i--) {
281 fill8_col(dest8, cval);
287 void atafb_iplan2p8_linefill(struct fb_info *info, u_long next_line,
288 int dy, int dx, u32 width,
289 const u8 *data, u32 bgcolor, u32 fgcolor)
294 u32 fgm[4], bgm[4], m;
296 dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));
298 fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);
304 data16 = (const u16 *)data;
305 expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);
307 for (rows = width / 16; rows; rows--) {
309 m = d | ((u32)d << 16);
310 *dest++ = (m & fgm[0]) ^ bgm[0];
311 *dest++ = (m & fgm[1]) ^ bgm[1];
312 *dest++ = (m & fgm[2]) ^ bgm[2];
313 *dest++ = (m & fgm[3]) ^ bgm[3];
316 data = (const u8 *)data16;
321 fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);