323 lines · c
1/*2 * linux/drivers/video/iplan2p8.c -- Low level frame buffer operations for3 * interleaved bitplanes à la Atari (84 * planes, 2 bytes interleave)5 *6 * Created 5 Apr 1997 by Geert Uytterhoeven7 *8 * This file is subject to the terms and conditions of the GNU General Public9 * License. See the file COPYING in the main directory of this archive for10 * more details.11 */12 13#include <linux/string.h>14#include <linux/fb.h>15 16#include <asm/setup.h>17 18#include "atafb.h"19 20#define BPL 821#include "atafb_utils.h"22 23 24/* Copies a 8 plane column from 's', height 'h', to 'd'. */25 26/* This expands a 8 bit color into two longs for two movepl (8 plane)27 * operations.28 */29 30void 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)33{34 /* bmove() has to distinguish two major cases: If both, source and35 * destination, start at even addresses or both are at odd36 * addresses, just the first odd and last even column (if present)37 * require special treatment (memmove_col()). The rest between38 * then can be copied by normal operations, because all adjacent39 * bytes are affected and are to be stored in the same order.40 * The pathological case is when the move should go from an odd41 * address to an even or vice versa. Since the bytes in the plane42 * words must be assembled in new order, it seems wisest to make43 * all movements by memmove_col().44 */45 46 u8 *src, *dst;47 u32 *s, *d;48 int w, l , i, j;49 u_int colsize;50 u_int upwards = (dy < sy) || (dy == sy && dx < sx);51 52 colsize = height;53 if (!((sx ^ dx) & 15)) {54 /* odd->odd or even->even */55 56 if (upwards) {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);59 if (sx & 15) {60 memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);61 src += BPL * 2;62 dst += BPL * 2;63 width -= 8;64 }65 w = width >> 4;66 if (w) {67 s = (u32 *)src;68 d = (u32 *)dst;69 w *= BPL / 2;70 l = next_line - w * 4;71 for (j = height; j > 0; j--) {72 for (i = w; i > 0; i--)73 *d++ = *s++;74 s = (u32 *)((u8 *)s + l);75 d = (u32 *)((u8 *)d + l);76 }77 }78 if (width & 15)79 memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),80 0xff00ff00, height, next_line - BPL * 2);81 } else {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);84 85 if ((sx + width) & 15) {86 src -= BPL * 2;87 dst -= BPL * 2;88 memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);89 width -= 8;90 }91 w = width >> 4;92 if (w) {93 s = (u32 *)src;94 d = (u32 *)dst;95 w *= BPL / 2;96 l = next_line - w * 4;97 for (j = height; j > 0; j--) {98 for (i = w; i > 0; i--)99 *--d = *--s;100 s = (u32 *)((u8 *)s - l);101 d = (u32 *)((u8 *)d - l);102 }103 }104 if (sx & 15)105 memmove32_col(dst - (width - 16) / (8 / BPL),106 src - (width - 16) / (8 / BPL),107 0xff00ff, colsize, -next_line - BPL * 2);108 }109 } else {110 /* odd->even or even->odd */111 if (upwards) {112 u32 *src32, *dst32;113 u32 pval[4], v, v1, mask;114 int i, j, w, f;115 116 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);118 119 mask = 0xff00ff00;120 f = 0;121 w = width;122 if (sx & 15) {123 f = 1;124 w += 8;125 }126 if ((sx + width) & 15)127 f |= 2;128 w >>= 4;129 for (i = height; i; i--) {130 src32 = (u32 *)src;131 dst32 = (u32 *)dst;132 133 if (f & 1) {134 pval[0] = (*src32++ << 8) & mask;135 pval[1] = (*src32++ << 8) & mask;136 pval[2] = (*src32++ << 8) & mask;137 pval[3] = (*src32++ << 8) & mask;138 } else {139 pval[0] = dst32[0] & mask;140 pval[1] = dst32[1] & mask;141 pval[2] = dst32[2] & mask;142 pval[3] = dst32[3] & mask;143 }144 145 for (j = w; j > 0; j--) {146 v = *src32++;147 v1 = v & mask;148 *dst32++ = pval[0] | (v1 >> 8);149 pval[0] = (v ^ v1) << 8;150 v = *src32++;151 v1 = v & mask;152 *dst32++ = pval[1] | (v1 >> 8);153 pval[1] = (v ^ v1) << 8;154 v = *src32++;155 v1 = v & mask;156 *dst32++ = pval[2] | (v1 >> 8);157 pval[2] = (v ^ v1) << 8;158 v = *src32++;159 v1 = v & mask;160 *dst32++ = pval[3] | (v1 >> 8);161 pval[3] = (v ^ v1) << 8;162 }163 164 if (f & 2) {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];169 }170 171 src += next_line;172 dst += next_line;173 }174 } else {175 u32 *src32, *dst32;176 u32 pval[4], v, v1, mask;177 int i, j, w, f;178 179 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);181 182 mask = 0xff00ff;183 f = 0;184 w = width;185 if ((dx + width) & 15)186 f = 1;187 if (sx & 15) {188 f |= 2;189 w += 8;190 }191 w >>= 4;192 for (i = height; i; i--) {193 src32 = (u32 *)src;194 dst32 = (u32 *)dst;195 196 if (f & 1) {197 pval[0] = dst32[-1] & mask;198 pval[1] = dst32[-2] & mask;199 pval[2] = dst32[-3] & mask;200 pval[3] = dst32[-4] & mask;201 } else {202 pval[0] = (*--src32 >> 8) & mask;203 pval[1] = (*--src32 >> 8) & mask;204 pval[2] = (*--src32 >> 8) & mask;205 pval[3] = (*--src32 >> 8) & mask;206 }207 208 for (j = w; j > 0; j--) {209 v = *--src32;210 v1 = v & mask;211 *--dst32 = pval[0] | (v1 << 8);212 pval[0] = (v ^ v1) >> 8;213 v = *--src32;214 v1 = v & mask;215 *--dst32 = pval[1] | (v1 << 8);216 pval[1] = (v ^ v1) >> 8;217 v = *--src32;218 v1 = v & mask;219 *--dst32 = pval[2] | (v1 << 8);220 pval[2] = (v ^ v1) >> 8;221 v = *--src32;222 v1 = v & mask;223 *--dst32 = pval[3] | (v1 << 8);224 pval[3] = (v ^ v1) >> 8;225 }226 227 if (!(f & 2)) {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];232 }233 234 src -= next_line;235 dst -= next_line;236 }237 }238 }239}240 241void atafb_iplan2p8_fillrect(struct fb_info *info, u_long next_line, u32 color,242 int sy, int sx, int height, int width)243{244 u32 *dest;245 int rows, i;246 u32 cval[4];247 248 dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));249 if (sx & 15) {250 u8 *dest8 = (u8 *)dest + 1;251 252 expand8_col2mask(color, cval);253 254 for (i = height; i; i--) {255 fill8_col(dest8, cval);256 dest8 += next_line;257 }258 dest += BPL / 2;259 width -= 8;260 }261 262 expand16_col2mask(color, cval);263 rows = width >> 4;264 if (rows) {265 u32 *d = dest;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);270 }271 dest += rows * BPL / 2;272 width &= 15;273 }274 275 if (width) {276 u8 *dest8 = (u8 *)dest;277 278 expand8_col2mask(color, cval);279 280 for (i = height; i; i--) {281 fill8_col(dest8, cval);282 dest8 += next_line;283 }284 }285}286 287void 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)290{291 u32 *dest;292 const u16 *data16;293 int rows;294 u32 fgm[4], bgm[4], m;295 296 dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));297 if (dx & 15) {298 fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);299 dest += BPL / 2;300 width -= 8;301 }302 303 if (width >= 16) {304 data16 = (const u16 *)data;305 expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);306 307 for (rows = width / 16; rows; rows--) {308 u16 d = *data16++;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];314 }315 316 data = (const u8 *)data16;317 width &= 15;318 }319 320 if (width)321 fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);322}323