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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/video/fbdev/atafb_iplan2p8.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/video/fbdev/atafb_iplan2p8.c')
-rw-r--r-- | drivers/video/fbdev/atafb_iplan2p8.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/drivers/video/fbdev/atafb_iplan2p8.c b/drivers/video/fbdev/atafb_iplan2p8.c new file mode 100644 index 000000000..39a6cbbb6 --- /dev/null +++ b/drivers/video/fbdev/atafb_iplan2p8.c @@ -0,0 +1,322 @@ +/* + * linux/drivers/video/iplan2p8.c -- Low level frame buffer operations for + * interleaved bitplanes à la Atari (8 + * planes, 2 bytes interleave) + * + * Created 5 Apr 1997 by Geert Uytterhoeven + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ + +#include <linux/string.h> +#include <linux/fb.h> + +#include <asm/setup.h> + +#include "atafb.h" + +#define BPL 8 +#include "atafb_utils.h" + + +/* Copies a 8 plane column from 's', height 'h', to 'd'. */ + +/* This expands a 8 bit color into two longs for two movepl (8 plane) + * operations. + */ + +void atafb_iplan2p8_copyarea(struct fb_info *info, u_long next_line, + int sy, int sx, int dy, int dx, + int height, int width) +{ + /* bmove() has to distinguish two major cases: If both, source and + * destination, start at even addresses or both are at odd + * addresses, just the first odd and last even column (if present) + * require special treatment (memmove_col()). The rest between + * then can be copied by normal operations, because all adjacent + * bytes are affected and are to be stored in the same order. + * The pathological case is when the move should go from an odd + * address to an even or vice versa. Since the bytes in the plane + * words must be assembled in new order, it seems wisest to make + * all movements by memmove_col(). + */ + + u8 *src, *dst; + u32 *s, *d; + int w, l , i, j; + u_int colsize; + u_int upwards = (dy < sy) || (dy == sy && dx < sx); + + colsize = height; + if (!((sx ^ dx) & 15)) { + /* odd->odd or even->even */ + + if (upwards) { + src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL); + dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL); + if (sx & 15) { + memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2); + src += BPL * 2; + dst += BPL * 2; + width -= 8; + } + w = width >> 4; + if (w) { + s = (u32 *)src; + d = (u32 *)dst; + w *= BPL / 2; + l = next_line - w * 4; + for (j = height; j > 0; j--) { + for (i = w; i > 0; i--) + *d++ = *s++; + s = (u32 *)((u8 *)s + l); + d = (u32 *)((u8 *)d + l); + } + } + if (width & 15) + memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL), + 0xff00ff00, height, next_line - BPL * 2); + } else { + src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL); + dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL); + + if ((sx + width) & 15) { + src -= BPL * 2; + dst -= BPL * 2; + memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2); + width -= 8; + } + w = width >> 4; + if (w) { + s = (u32 *)src; + d = (u32 *)dst; + w *= BPL / 2; + l = next_line - w * 4; + for (j = height; j > 0; j--) { + for (i = w; i > 0; i--) + *--d = *--s; + s = (u32 *)((u8 *)s - l); + d = (u32 *)((u8 *)d - l); + } + } + if (sx & 15) + memmove32_col(dst - (width - 16) / (8 / BPL), + src - (width - 16) / (8 / BPL), + 0xff00ff, colsize, -next_line - BPL * 2); + } + } else { + /* odd->even or even->odd */ + if (upwards) { + u32 *src32, *dst32; + u32 pval[4], v, v1, mask; + int i, j, w, f; + + src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL); + dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL); + + mask = 0xff00ff00; + f = 0; + w = width; + if (sx & 15) { + f = 1; + w += 8; + } + if ((sx + width) & 15) + f |= 2; + w >>= 4; + for (i = height; i; i--) { + src32 = (u32 *)src; + dst32 = (u32 *)dst; + + if (f & 1) { + pval[0] = (*src32++ << 8) & mask; + pval[1] = (*src32++ << 8) & mask; + pval[2] = (*src32++ << 8) & mask; + pval[3] = (*src32++ << 8) & mask; + } else { + pval[0] = dst32[0] & mask; + pval[1] = dst32[1] & mask; + pval[2] = dst32[2] & mask; + pval[3] = dst32[3] & mask; + } + + for (j = w; j > 0; j--) { + v = *src32++; + v1 = v & mask; + *dst32++ = pval[0] | (v1 >> 8); + pval[0] = (v ^ v1) << 8; + v = *src32++; + v1 = v & mask; + *dst32++ = pval[1] | (v1 >> 8); + pval[1] = (v ^ v1) << 8; + v = *src32++; + v1 = v & mask; + *dst32++ = pval[2] | (v1 >> 8); + pval[2] = (v ^ v1) << 8; + v = *src32++; + v1 = v & mask; + *dst32++ = pval[3] | (v1 >> 8); + pval[3] = (v ^ v1) << 8; + } + + if (f & 2) { + dst32[0] = (dst32[0] & mask) | pval[0]; + dst32[1] = (dst32[1] & mask) | pval[1]; + dst32[2] = (dst32[2] & mask) | pval[2]; + dst32[3] = (dst32[3] & mask) | pval[3]; + } + + src += next_line; + dst += next_line; + } + } else { + u32 *src32, *dst32; + u32 pval[4], v, v1, mask; + int i, j, w, f; + + src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL); + dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL); + + mask = 0xff00ff; + f = 0; + w = width; + if ((dx + width) & 15) + f = 1; + if (sx & 15) { + f |= 2; + w += 8; + } + w >>= 4; + for (i = height; i; i--) { + src32 = (u32 *)src; + dst32 = (u32 *)dst; + + if (f & 1) { + pval[0] = dst32[-1] & mask; + pval[1] = dst32[-2] & mask; + pval[2] = dst32[-3] & mask; + pval[3] = dst32[-4] & mask; + } else { + pval[0] = (*--src32 >> 8) & mask; + pval[1] = (*--src32 >> 8) & mask; + pval[2] = (*--src32 >> 8) & mask; + pval[3] = (*--src32 >> 8) & mask; + } + + for (j = w; j > 0; j--) { + v = *--src32; + v1 = v & mask; + *--dst32 = pval[0] | (v1 << 8); + pval[0] = (v ^ v1) >> 8; + v = *--src32; + v1 = v & mask; + *--dst32 = pval[1] | (v1 << 8); + pval[1] = (v ^ v1) >> 8; + v = *--src32; + v1 = v & mask; + *--dst32 = pval[2] | (v1 << 8); + pval[2] = (v ^ v1) >> 8; + v = *--src32; + v1 = v & mask; + *--dst32 = pval[3] | (v1 << 8); + pval[3] = (v ^ v1) >> 8; + } + + if (!(f & 2)) { + dst32[-1] = (dst32[-1] & mask) | pval[0]; + dst32[-2] = (dst32[-2] & mask) | pval[1]; + dst32[-3] = (dst32[-3] & mask) | pval[2]; + dst32[-4] = (dst32[-4] & mask) | pval[3]; + } + + src -= next_line; + dst -= next_line; + } + } + } +} + +void atafb_iplan2p8_fillrect(struct fb_info *info, u_long next_line, u32 color, + int sy, int sx, int height, int width) +{ + u32 *dest; + int rows, i; + u32 cval[4]; + + dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL)); + if (sx & 15) { + u8 *dest8 = (u8 *)dest + 1; + + expand8_col2mask(color, cval); + + for (i = height; i; i--) { + fill8_col(dest8, cval); + dest8 += next_line; + } + dest += BPL / 2; + width -= 8; + } + + expand16_col2mask(color, cval); + rows = width >> 4; + if (rows) { + u32 *d = dest; + u32 off = next_line - rows * BPL * 2; + for (i = height; i; i--) { + d = fill16_col(d, rows, cval); + d = (u32 *)((long)d + off); + } + dest += rows * BPL / 2; + width &= 15; + } + + if (width) { + u8 *dest8 = (u8 *)dest; + + expand8_col2mask(color, cval); + + for (i = height; i; i--) { + fill8_col(dest8, cval); + dest8 += next_line; + } + } +} + +void atafb_iplan2p8_linefill(struct fb_info *info, u_long next_line, + int dy, int dx, u32 width, + const u8 *data, u32 bgcolor, u32 fgcolor) +{ + u32 *dest; + const u16 *data16; + int rows; + u32 fgm[4], bgm[4], m; + + dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL)); + if (dx & 15) { + fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++); + dest += BPL / 2; + width -= 8; + } + + if (width >= 16) { + data16 = (const u16 *)data; + expand16_2col2mask(fgcolor, bgcolor, fgm, bgm); + + for (rows = width / 16; rows; rows--) { + u16 d = *data16++; + m = d | ((u32)d << 16); + *dest++ = (m & fgm[0]) ^ bgm[0]; + *dest++ = (m & fgm[1]) ^ bgm[1]; + *dest++ = (m & fgm[2]) ^ bgm[2]; + *dest++ = (m & fgm[3]) ^ bgm[3]; + } + + data = (const u8 *)data16; + width &= 15; + } + + if (width) + fill8_2col((u8 *)dest, fgcolor, bgcolor, *data); +} |