diff options
Diffstat (limited to 'xorg-server/hw/xfree86/xf4bpp/mfbbresd.c')
| -rw-r--r-- | xorg-server/hw/xfree86/xf4bpp/mfbbresd.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/xf4bpp/mfbbresd.c b/xorg-server/hw/xfree86/xf4bpp/mfbbresd.c new file mode 100644 index 000000000..318d4f5da --- /dev/null +++ b/xorg-server/hw/xfree86/xf4bpp/mfbbresd.c @@ -0,0 +1,205 @@ +/*********************************************************** + +Copyright (c) 1987 X Consortium + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of the X Consortium shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from the X Consortium. + + +Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the name of Digital not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR +ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +SOFTWARE. + +******************************************************************/ +/* GJA -- modified this file for vga16 */ + +#ifdef HAVE_XORG_CONFIG_H +#include <xorg-config.h> +#endif + +#include "xf4bpp.h" +#include "OScompiler.h" +#include "mfbmap.h" +#include "mfb.h" +#include "maskbits.h" +#include "miline.h" +#include "wm3.h" +#include "xf86.h" + +/* Dashed bresenham line */ + +#define NO_INK (-1) /* GJA -- means: dash is off */ + +#define StepDash\ + if (!--dashRemaining) { \ + if (++ dashIndex == numInDashList) \ + dashIndex = 0; \ + dashRemaining = pDash[dashIndex]; \ + ink = fgink; \ + if (dashIndex & 1) \ + ink = bgink; \ + if (isDoubleDash) \ + WM3_SET_INK(ink); \ + } + +void +xf4bppBresD(pDrawable, fgink, bgink, + pdashIndex, pDash, numInDashList, pdashOffset, isDoubleDash, + addrlbase, nlwidth, + signdx, signdy, axis, x1, y1, e, e1, e2, len) +DrawablePtr pDrawable; +int fgink, bgink; +int *pdashIndex; /* current dash */ +unsigned char *pDash; /* dash list */ +int numInDashList; /* total length of dash list */ +int *pdashOffset; /* offset into current dash */ +int isDoubleDash; +PixelType *addrlbase; /* pointer to base of bitmap */ +int nlwidth; /* width in longwords of bitmap */ +int signdx, signdy; /* signs of directions */ +int axis; /* major axis (Y_AXIS or X_AXIS) */ +int x1, y1; /* initial point */ +register int e; /* error accumulator */ +register int e1; /* bresenham increments */ +int e2; +int len; /* length of line */ +{ + IOADDRESS REGBASE = + xf86Screens[pDrawable->pScreen->myNum]->domainIOBase + 0x300; + register int yinc; /* increment to next scanline, in bytes */ + register PixelType *addrl; + register int e3 = e2-e1; + register unsigned long bit; + PixelType leftbit = mfbGetmask(0); /* leftmost bit to process in new word */ + PixelType rightbit = mfbGetmask(PPW-1); /* rightmost bit to process in new word */ + int dashIndex; + int dashOffset; + int dashRemaining; + int ink; + + fgink &= 0x0F; bgink &= 0x0F; /* GJA -- so they're != NO_INK */ + + dashOffset = *pdashOffset; + dashIndex = *pdashIndex; + dashRemaining = pDash[dashIndex] - dashOffset; + ink = fgink; + if (!isDoubleDash) + bgink = NO_INK; + if (dashIndex & 1) + ink = bgink; + if ( ink != NO_INK ) WM3_SET_INK(ink); + + /* point to longword containing first point */ + addrl = mfbScanline(addrlbase, x1, y1, nlwidth); + yinc = signdy * nlwidth; + e = e-e1; /* to make looping easier */ + bit = mfbGetmask(x1 & PIM); + if (axis == X_AXIS) + { + if (signdx > 0) + { + while(len--) + { + if ( ink != NO_INK ) UPDRW(addrl,bit); + e += e1; + if (e >= 0) + { + addrl += yinc; + e += e3; + } + bit = SCRRIGHT(bit,1); + if (!bit) { bit = leftbit; addrl++; } + StepDash + } + } + else + { + while(len--) + { + + if ( ink != NO_INK ) UPDRW(addrl,bit); + e += e1; + if (e >= 0) + { + addrl += yinc; + e += e3; + } + bit = SCRLEFT(bit,1); + if (!bit) { bit = rightbit; addrl--; } + StepDash + } + } + } /* if X_AXIS */ + else + { + if (signdx > 0) + { + while(len--) + { + if ( ink != NO_INK ) UPDRW(addrl,bit); + e += e1; + if (e >= 0) + { + bit = SCRRIGHT(bit,1); + if (!bit) { bit = leftbit; addrl++; } + e += e3; + } + addrl += yinc; + StepDash + } + } + else + { + while(len--) + { + + if ( ink != NO_INK ) UPDRW(addrl,bit); + e += e1; + if (e >= 0) + { + bit = SCRLEFT(bit,1); + if (!bit) { bit = rightbit; addrl--; } + e += e3; + } + addrl += yinc; + StepDash + } + } + } /* else Y_AXIS */ + *pdashIndex = dashIndex; + *pdashOffset = pDash[dashIndex] - dashRemaining; +} |