/* * linux/drivers/video/iplan2p2.c -- Low level frame buffer operations for * interleaved bitplanes à la Atari (2 * 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/module.h> #include <linux/string.h> #include <linux/fb.h> #include <asm/setup.h> #include "atafb.h" #define BPL 2 #include "atafb_utils.h" void atafb_iplan2p2_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; } else { pval[0] = dst32[0] & mask; } for (j = w; j > 0; j--) { v = *src32++; v1 = v & mask; *dst32++ = pval[0] | (v1 >> 8); pval[0] = (v ^ v1) << 8; } if (f & 2) { dst32[0] = (dst32[0] & mask) | pval[0]; } 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; } else { pval[0] = (*--src32 >> 8) & mask; } for (j = w; j > 0; j--) { v = *--src32; v1 = v & mask; *--dst32 = pval[0] | (v1 << 8); pval[0] = (v ^ v1) >> 8; } if (!(f & 2)) { dst32[-1] = (dst32[-1] & mask) | pval[0]; } src -= next_line; dst -= next_line; } } } } void atafb_iplan2p2_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_iplan2p2_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]; } data = (const u8 *)data16; width &= 15; } if (width) fill8_2col((u8 *)dest, fgcolor, bgcolor, *data); } #ifdef MODULE MODULE_LICENSE("GPL"); int init_module(void) { return 0; } void cleanup_module(void) { } #endif /* MODULE */ /* * Visible symbols for modules */ EXPORT_SYMBOL(atafb_iplan2p2_copyarea); EXPORT_SYMBOL(atafb_iplan2p2_fillrect); EXPORT_SYMBOL(atafb_iplan2p2_linefill);