diff options
Diffstat (limited to 'cfb/cfbbres.c')
| -rw-r--r-- | cfb/cfbbres.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/cfb/cfbbres.c b/cfb/cfbbres.c new file mode 100644 index 000000000..139a868b7 --- /dev/null +++ b/cfb/cfbbres.c @@ -0,0 +1,233 @@ +/*********************************************************** + +Copyright 1987, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +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 +OPEN GROUP 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 Open Group 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 Open Group. + + +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. + +******************************************************************/ +/* $Xorg: cfbbres.c,v 1.4 2001/02/09 02:04:37 xorgcvs Exp $ */ +#include "X.h" +#include "misc.h" +#include "cfb.h" +#include "cfbmskbits.h" +#include "servermd.h" +#include "miline.h" + +/* Solid bresenham line */ +/* NOTES + e2 is used less often than e1, so it's not in a register +*/ + +void +cfbBresS(rop, and, xor, addrl, nlwidth, signdx, signdy, axis, x1, y1, e, e1, + e2, len) + int rop; + unsigned long and, xor; + unsigned long *addrl; /* pointer to base of bitmap */ + int nlwidth; /* width in longwords of bitmap */ + register int signdx; + int 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 */ +{ + register int e3 = e2-e1; +#ifdef PIXEL_ADDR + register PixelType *addrp; /* Pixel pointer */ + + if (len == 0) + return; + /* point to first point */ + nlwidth <<= PWSH; + addrp = (PixelType *)(addrl) + (y1 * nlwidth) + x1; + if (signdy < 0) + nlwidth = -nlwidth; + e = e-e1; /* to make looping easier */ + + if (axis == Y_AXIS) + { + int t; + + t = nlwidth; + nlwidth = signdx; + signdx = t; + } + if (rop == GXcopy) + { + --len; +#define body {\ + *addrp = xor; \ + addrp += signdx; \ + e += e1; \ + if (e >= 0) \ + { \ + addrp += nlwidth; \ + e += e3; \ + } \ + } + while (len >= 4) + { + body body body body + len -= 4; + } + switch (len) + { + case 3: body case 2: body case 1: body + } +#undef body + *addrp = xor; + } + else /* not GXcopy */ + { + while(len--) + { + *addrp = DoRRop (*addrp, and, xor); + e += e1; + if (e >= 0) + { + addrp += nlwidth; + e += e3; + } + addrp += signdx; + } + } +#else /* !PIXEL_ADDR */ + register unsigned long tmp, bit; + unsigned long leftbit, rightbit; + + /* point to longword containing first point */ + addrl = (addrl + (y1 * nlwidth) + (x1 >> PWSH)); + if (signdy < 0) + nlwidth = -nlwidth; + e = e-e1; /* to make looping easier */ + + leftbit = cfbmask[0]; + rightbit = cfbmask[PPW-1]; + bit = cfbmask[x1 & PIM]; + + if (axis == X_AXIS) + { + if (signdx > 0) + { + while (len--) + { + *addrl = DoMaskRRop (*addrl, and, xor, bit); + bit = SCRRIGHT(bit,1); + e += e1; + if (e >= 0) + { + addrl += nlwidth; + e += e3; + } + if (!bit) + { + bit = leftbit; + addrl++; + } + } + } + else + { + while (len--) + { + *addrl = DoMaskRRop (*addrl, and, xor, bit); + e += e1; + bit = SCRLEFT(bit,1); + if (e >= 0) + { + addrl += nlwidth; + e += e3; + } + if (!bit) + { + bit = rightbit; + addrl--; + } + } + } + } /* if X_AXIS */ + else + { + if (signdx > 0) + { + while(len--) + { + *addrl = DoMaskRRop (*addrl, and, xor, bit); + e += e1; + if (e >= 0) + { + bit = SCRRIGHT(bit,1); + if (!bit) + { + bit = leftbit; + addrl++; + } + e += e3; + } + addrl += nlwidth; + } + } + else + { + while(len--) + { + *addrl = DoMaskRRop (*addrl, and, xor, bit); + e += e1; + if (e >= 0) + { + bit = SCRLEFT(bit,1); + if (!bit) + { + bit = rightbit; + addrl--; + } + e += e3; + } + addrl += nlwidth; + } + } + } /* else Y_AXIS */ +#endif +} |