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-rw-r--r--xorg-server/cfb/cfbbresd.c404
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diff --git a/xorg-server/cfb/cfbbresd.c b/xorg-server/cfb/cfbbresd.c
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-/***********************************************************
-
-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.
-
-******************************************************************/
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <X11/X.h>
-#include "misc.h"
-#include "cfb.h"
-#include "cfbmskbits.h"
-#include "miline.h"
-
-/* Dashed bresenham line */
-
-void
-cfbBresD(rrops,
- pdashIndex, pDash, numInDashList, pdashOffset, isDoubleDash,
- addrl, nlwidth,
- signdx, signdy, axis, x1, y1, e, e1, e2, len)
- cfbRRopPtr rrops;
- int *pdashIndex; /* current dash */
- unsigned char *pDash; /* dash list */
- int numInDashList; /* total length of dash list */
- int *pdashOffset; /* offset into current dash */
- int isDoubleDash;
- CfbBits *addrl; /* 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 */
-{
-#ifdef PIXEL_ADDR
- register PixelType *addrp;
-#endif
- register int e3 = e2-e1;
- int dashIndex;
- int dashOffset;
- int dashRemaining;
- CfbBits xorFg, andFg, xorBg, andBg;
- Bool isCopy;
- int thisDash;
-#if PSZ == 24
- CfbBits xorPiQxlFg[3], andPiQxlFg[3], xorPiQxlBg[3], andPiQxlBg[3];
- char *addrb;
- int signdx3, signdy3;
-#endif
-
- dashOffset = *pdashOffset;
- dashIndex = *pdashIndex;
- isCopy = (rrops[0].rop == GXcopy && rrops[1].rop == GXcopy);
-#if PSZ == 24
- xorFg = rrops[0].xor & 0xffffff;
- andFg = rrops[0].and & 0xffffff;
- xorBg = rrops[1].xor & 0xffffff;
- andBg = rrops[1].and & 0xffffff;
- xorPiQxlFg[0] = xorFg | (xorFg << 24);
- xorPiQxlFg[1] = (xorFg >> 8) | (xorFg << 16);
- xorPiQxlFg[2] = (xorFg >> 16) | (xorFg << 8);
- andPiQxlFg[0] = andFg | (andFg << 24);
- andPiQxlFg[1] = (andFg >> 8) | (andFg << 16);
- andPiQxlFg[2] = (andFg >> 16) | (andFg << 8);
- xorPiQxlBg[0] = xorBg | (xorBg << 24);
- xorPiQxlBg[1] = (xorBg >> 8) | (xorBg << 16);
- xorPiQxlBg[2] = (xorBg >> 16) | (xorBg << 8);
- andPiQxlBg[0] = andBg | (andBg << 24);
- andPiQxlBg[1] = (andBg >> 8) | (andBg << 16);
- andPiQxlBg[2] = (andFg >> 16) | (andBg << 8);
-#else
- xorFg = rrops[0].xor;
- andFg = rrops[0].and;
- xorBg = rrops[1].xor;
- andBg = rrops[1].and;
-#endif
- dashRemaining = pDash[dashIndex] - dashOffset;
- if ((thisDash = dashRemaining) >= len)
- {
- thisDash = len;
- dashRemaining -= len;
- }
- e = e-e1; /* to make looping easier */
-
-#define BresStep(minor,major) {if ((e += e1) >= 0) { e += e3; minor; } major;}
-
-#define NextDash {\
- dashIndex++; \
- if (dashIndex == numInDashList) \
- dashIndex = 0; \
- dashRemaining = pDash[dashIndex]; \
- if ((thisDash = dashRemaining) >= len) \
- { \
- dashRemaining -= len; \
- thisDash = len; \
- } \
-}
-
-#ifdef PIXEL_ADDR
-
-#if PSZ == 24
-#define Loop(store) while (thisDash--) {\
- store; \
- BresStep(addrb+=signdy3,addrb+=signdx3) \
- }
- /* point to first point */
- nlwidth <<= PWSH;
- addrp = (PixelType *)(addrl) + (y1 * nlwidth);
- addrb = (char *)addrp + x1 * 3;
-
-#else
-#define Loop(store) while (thisDash--) {\
- store; \
- BresStep(addrp+=signdy,addrp+=signdx) \
- }
- /* point to first point */
- nlwidth <<= PWSH;
- addrp = (PixelType *)(addrl) + (y1 * nlwidth) + x1;
-#endif
- signdy *= nlwidth;
-#if PSZ == 24
- signdx3 = signdx * 3;
- signdy3 = signdy * sizeof (CfbBits);
-#endif
- if (axis == Y_AXIS)
- {
- int t;
-
- t = signdx;
- signdx = signdy;
- signdy = t;
-#if PSZ == 24
- t = signdx3;
- signdx3 = signdy3;
- signdy3 = t;
-#endif
- }
-
- if (isCopy)
- {
-#if PSZ == 24
-#define body_copy(pix) { \
- addrp = (PixelType *)((unsigned long)addrb & ~0x03); \
- switch((unsigned long)addrb & 3){ \
- case 0: \
- *addrp = (*addrp & 0xFF000000)|((pix)[0] & 0xFFFFFF); \
- break; \
- case 1: \
- *addrp = (*addrp & 0xFF)|((pix)[2] & 0xFFFFFF00); \
- break; \
- case 3: \
- *addrp = (*addrp & 0xFFFFFF)|((pix)[0] & 0xFF000000); \
- *(addrp+1) = (*(addrp+1) & 0xFFFF0000)|((pix)[1] & 0xFFFF); \
- break; \
- case 2: \
- *addrp = (*addrp & 0xFFFF)|((pix)[1] & 0xFFFF0000); \
- *(addrp+1) = (*(addrp+1) & 0xFFFFFF00)|((pix)[2] & 0xFF); \
- break; \
- } \
-}
-#endif /* PSZ == 24 */
-
- for (;;)
- {
- len -= thisDash;
- if (dashIndex & 1) {
- if (isDoubleDash) {
-#if PSZ == 24
- Loop(body_copy(xorPiQxlBg))
-#else
- Loop(*addrp = xorBg)
-#endif
- } else {
- Loop(;)
- }
- } else {
-#if PSZ == 24
- Loop(body_copy(xorPiQxlFg))
-#else
- Loop(*addrp = xorFg)
-#endif
- }
- if (!len)
- break;
- NextDash
- }
-#undef body_copy
- }
- else
- {
-#define body_set(and, xor) { \
- addrp = (PixelType *)((unsigned long)addrb & ~0x03); \
- switch((unsigned long)addrb & 3){ \
- case 0: \
- *addrp = (*addrp & ((and)[0]|0xFF000000)) ^ ((xor)[0] & 0xFFFFFF); \
- break; \
- case 1: \
- *addrp = (*addrp & ((and)[2]|0xFF)) ^ ((xor)[2] & 0xFFFFFF00); \
- break; \
- case 3: \
- *addrp = (*addrp & ((and)[0]|0xFFFFFF)) ^ ((xor)[0] & 0xFF000000); \
- *(addrp+1)=(*(addrp+1)&((and)[1]|0xFFFF0000)) ^ ((xor)[1]&0xFFFF); \
- break; \
- case 2: \
- *addrp = (*addrp & ((and)[1]|0xFFFF)) ^ ((xor)[1] & 0xFFFF0000); \
- *(addrp+1)=(*(addrp+1)&((and)[2]|0xFFFFFF00)) ^ ((xor)[2] & 0xFF); \
- break; \
- } \
-}
-
- for (;;)
- {
- len -= thisDash;
- if (dashIndex & 1) {
- if (isDoubleDash) {
-#if PSZ == 24
- Loop(body_set(andPiQxlBg, xorPiQxlBg))
-#else
- Loop(*addrp = DoRRop(*addrp,andBg, xorBg))
-#endif
- } else {
- Loop(;)
- }
- } else {
-#if PSZ == 24
- Loop(body_set(andPiQxlFg, xorPiQxlFg))
-#else
- Loop(*addrp = DoRRop(*addrp,andFg, xorFg))
-#endif
- }
- if (!len)
- break;
- NextDash
- }
-#undef body_set
- }
-#else /* !PIXEL_ADDR */
- {
- register CfbBits tmp;
- CfbBits startbit, bit;
-
- /* point to longword containing first point */
-#if PSZ == 24
- addrl = (addrl + (y1 * nlwidth) + ((x1*3) >> 2);
-#else
- addrl = (addrl + (y1 * nlwidth) + (x1 >> PWSH));
-#endif
- signdy = signdy * nlwidth;
-
- if (signdx > 0)
- startbit = cfbmask[0];
- else
-#if PSZ == 24
- startbit = cfbmask[(PPW-1)<<1];
- bit = cfbmask[(x1 & 3)<<1];
-#else
- startbit = cfbmask[PPW-1];
- bit = cfbmask[x1 & PIM];
-#endif
-
-#if PSZ == 24
-#define X_Loop(store) while(thisDash--) {\
- store; \
- BresStep(addrl += signdy, \
- if (signdx > 0) \
- bit = SCRRIGHT(bit,1); \
- else \
- bit = SCRLEFT(bit,1); \
- if (!bit) \
- { \
- bit = startbit; \
- addrl += signdx; \
- }) \
- }
-#define Y_Loop(store) while(thisDash--) {\
- store; \
- BresStep(if (signdx > 0) \
- bit = SCRRIGHT(bit,1); \
- else \
- bit = SCRLEFT(bit,1); \
- if (!bit) \
- { \
- bit = startbit; \
- addrl += signdx; \
- }, \
- addrl += signdy) \
- }
-#else
-#define X_Loop(store) while(thisDash--) {\
- store; \
- BresStep(addrl += signdy, \
- if (signdx > 0) \
- bit = SCRRIGHT(bit,1); \
- else \
- bit = SCRLEFT(bit,1); \
- if (!bit) \
- { \
- bit = startbit; \
- addrl += signdx; \
- }) \
- }
-#define Y_Loop(store) while(thisDash--) {\
- store; \
- BresStep(if (signdx > 0) \
- bit = SCRRIGHT(bit,1); \
- else \
- bit = SCRLEFT(bit,1); \
- if (!bit) \
- { \
- bit = startbit; \
- addrl += signdx; \
- }, \
- addrl += signdy) \
- }
-#endif
-
- if (axis == X_AXIS)
- {
- for (;;)
- {
- len -= thisDash;
- if (dashIndex & 1) {
- if (isDoubleDash) {
- X_Loop(*addrl = DoMaskRRop(*addrl, andBg, xorBg, bit));
- } else {
- X_Loop(;)
- }
- } else {
- X_Loop(*addrl = DoMaskRRop(*addrl, andFg, xorFg, bit));
- }
- if (!len)
- break;
- NextDash
- }
- } /* if X_AXIS */
- else
- {
- for (;;)
- {
- len -= thisDash;
- if (dashIndex & 1) {
- if (isDoubleDash) {
- Y_Loop(*addrl = DoMaskRRop(*addrl, andBg, xorBg, bit));
- } else {
- Y_Loop(;)
- }
- } else {
- Y_Loop(*addrl = DoMaskRRop(*addrl, andFg, xorFg, bit));
- }
- if (!len)
- break;
- NextDash
- }
- } /* else Y_AXIS */
- }
-#endif
- *pdashIndex = dashIndex;
- *pdashOffset = pDash[dashIndex] - dashRemaining;
-}
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