149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/xaa/xaaLineMisc.c,v 1.4 1998/09/27 04:43:45 dawes Exp $ */
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#include "misc.h"
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#include "xf86.h"
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#include "xf86_ansic.h"
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#include "xf86_OSproc.h"
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#include <X11/X.h>
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#include "scrnintstr.h"
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#include "miline.h"
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#include "xf86str.h"
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#include "xaa.h"
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#include "xaalocal.h"
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void
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XAASolidHorVertLineAsRects(
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ScrnInfoPtr pScrn,
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int x, int y, int len, int dir
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){
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
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if(dir == DEGREES_0)
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(*infoRec->SubsequentSolidFillRect)(pScrn, x, y, len, 1);
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else
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(*infoRec->SubsequentSolidFillRect)(pScrn, x, y, 1, len);
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}
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void
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XAASolidHorVertLineAsTwoPoint(
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ScrnInfoPtr pScrn,
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int x, int y, int len, int dir
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){
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
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len--;
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if(dir == DEGREES_0)
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(*infoRec->SubsequentSolidTwoPointLine)(pScrn, x, y, x + len, y, 0);
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else
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(*infoRec->SubsequentSolidTwoPointLine)(pScrn, x, y, x, y + len, 0);
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}
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void
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XAASolidHorVertLineAsBresenham(
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ScrnInfoPtr pScrn,
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int x, int y, int len, int dir
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){
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
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if(dir == DEGREES_0)
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(*infoRec->SubsequentSolidBresenhamLine)(
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pScrn, x, y, len << 1, 0, -len, len, 0);
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else
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(*infoRec->SubsequentSolidBresenhamLine)(
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pScrn, x, y, len << 1, 0, -len, len, YMAJOR);
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}
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void
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XAAComputeDash(GCPtr pGC)
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{
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
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XAAGCPtr pGCPriv = (XAAGCPtr) (pGC)->devPrivates[XAAGCIndex].ptr;
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Bool EvenDash = (pGC->numInDashList & 0x01) ? FALSE : TRUE;
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int PatternLength = 0;
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unsigned char* DashPtr = (unsigned char*)pGC->dash;
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CARD32 *ptr;
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int count = pGC->numInDashList;
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int shift, value, direction;
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Bool set;
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if(pGCPriv->DashPattern)
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xfree(pGCPriv->DashPattern);
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pGCPriv->DashPattern = NULL;
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pGCPriv->DashLength = 0;
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while(count--)
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PatternLength += *(DashPtr++);
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if(!EvenDash)
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PatternLength <<= 1;
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if(PatternLength > infoRec->DashPatternMaxLength)
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return;
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if((infoRec->DashedLineFlags & LINE_PATTERN_POWER_OF_2_ONLY) &&
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(PatternLength & (PatternLength - 1)))
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return;
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pGCPriv->DashPattern = xcalloc((PatternLength + 31) >> 5, 4);
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if(!pGCPriv->DashPattern) return;
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pGCPriv->DashLength = PatternLength;
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if(infoRec->DashedLineFlags & (LINE_PATTERN_LSBFIRST_MSBJUSTIFIED |
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LINE_PATTERN_LSBFIRST_LSBJUSTIFIED)) {
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direction = 1;
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set = TRUE;
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DashPtr = (unsigned char*)pGC->dash;
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} else {
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direction = -1;
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set = FALSE;
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DashPtr = (unsigned char*)pGC->dash + pGC->numInDashList - 1;
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}
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if(infoRec->DashedLineFlags & (LINE_PATTERN_LSBFIRST_MSBJUSTIFIED |
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LINE_PATTERN_MSBFIRST_MSBJUSTIFIED))
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shift = 32 - (PatternLength & 31);
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else
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shift = 0;
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ptr = (CARD32*)(pGCPriv->DashPattern);
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CONCATENATE:
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count = pGC->numInDashList;
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while(count--) {
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value = *DashPtr;
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DashPtr += direction;
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while(value) {
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if(value < (32 - shift)) {
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if(set) *ptr |= XAAShiftMasks[value] << shift;
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shift += value;
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break;
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} else {
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if(set) *ptr |= ~0L << shift;
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value -= (32 - shift);
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shift = 0;
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ptr++;
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}
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}
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if(set) set = FALSE;
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else set = TRUE;
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}
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if(!EvenDash) {
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EvenDash = TRUE;
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if(infoRec->DashedLineFlags & (LINE_PATTERN_LSBFIRST_MSBJUSTIFIED |
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LINE_PATTERN_LSBFIRST_LSBJUSTIFIED))
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DashPtr = (unsigned char*)pGC->dash;
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else
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DashPtr = (unsigned char*)pGC->dash + pGC->numInDashList;
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goto CONCATENATE;
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}
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}
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