2 * linux/drivers/video/iplan2p2.c -- Low level frame buffer operations for
3 * interleaved bitplanes à la Atari (2
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"
23 void atafb_iplan2p2_copyarea(struct fb_info *info, u_long next_line,
24 int sy, int sx, int dy, int dx,
25 int height, int width)
27 /* bmove() has to distinguish two major cases: If both, source and
28 * destination, start at even addresses or both are at odd
29 * addresses, just the first odd and last even column (if present)
30 * require special treatment (memmove_col()). The rest between
31 * then can be copied by normal operations, because all adjacent
32 * bytes are affected and are to be stored in the same order.
33 * The pathological case is when the move should go from an odd
34 * address to an even or vice versa. Since the bytes in the plane
35 * words must be assembled in new order, it seems wisest to make
36 * all movements by memmove_col().
43 u_int upwards = (dy < sy) || (dy == sy && dx < sx);
46 if (!((sx ^ dx) & 15)) {
47 /* odd->odd or even->even */
50 src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
51 dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
53 memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
63 l = next_line - w * 4;
64 for (j = height; j > 0; j--) {
65 for (i = w; i > 0; i--)
67 s = (u32 *)((u8 *)s + l);
68 d = (u32 *)((u8 *)d + l);
72 memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
73 0xff00ff00, height, next_line - BPL * 2);
75 src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
76 dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
78 if ((sx + width) & 15) {
81 memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
89 l = next_line - w * 4;
90 for (j = height; j > 0; j--) {
91 for (i = w; i > 0; i--)
93 s = (u32 *)((u8 *)s - l);
94 d = (u32 *)((u8 *)d - l);
98 memmove32_col(dst - (width - 16) / (8 / BPL),
99 src - (width - 16) / (8 / BPL),
100 0xff00ff, colsize, -next_line - BPL * 2);
103 /* odd->even or even->odd */
106 u32 pval[4], v, v1, mask;
109 src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
110 dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
119 if ((sx + width) & 15)
122 for (i = height; i; i--) {
127 pval[0] = (*src32++ << 8) & mask;
129 pval[0] = dst32[0] & mask;
132 for (j = w; j > 0; j--) {
135 *dst32++ = pval[0] | (v1 >> 8);
136 pval[0] = (v ^ v1) << 8;
140 dst32[0] = (dst32[0] & mask) | pval[0];
148 u32 pval[4], v, v1, mask;
151 src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
152 dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
157 if ((dx + width) & 15)
164 for (i = height; i; i--) {
169 pval[0] = dst32[-1] & mask;
171 pval[0] = (*--src32 >> 8) & mask;
174 for (j = w; j > 0; j--) {
177 *--dst32 = pval[0] | (v1 << 8);
178 pval[0] = (v ^ v1) >> 8;
182 dst32[-1] = (dst32[-1] & mask) | pval[0];
192 void atafb_iplan2p2_fillrect(struct fb_info *info, u_long next_line, u32 color,
193 int sy, int sx, int height, int width)
199 dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));
201 u8 *dest8 = (u8 *)dest + 1;
203 expand8_col2mask(color, cval);
205 for (i = height; i; i--) {
206 fill8_col(dest8, cval);
213 expand16_col2mask(color, cval);
217 u32 off = next_line - rows * BPL * 2;
218 for (i = height; i; i--) {
219 d = fill16_col(d, rows, cval);
220 d = (u32 *)((long)d + off);
222 dest += rows * BPL / 2;
227 u8 *dest8 = (u8 *)dest;
229 expand8_col2mask(color, cval);
231 for (i = height; i; i--) {
232 fill8_col(dest8, cval);
238 void atafb_iplan2p2_linefill(struct fb_info *info, u_long next_line,
239 int dy, int dx, u32 width,
240 const u8 *data, u32 bgcolor, u32 fgcolor)
245 u32 fgm[4], bgm[4], m;
247 dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));
249 fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);
255 data16 = (const u16 *)data;
256 expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);
258 for (rows = width / 16; rows; rows--) {
260 m = d | ((u32)d << 16);
261 *dest++ = (m & fgm[0]) ^ bgm[0];
264 data = (const u8 *)data16;
269 fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);