vnchooks.cc

Informix Table extraction queries have been optimized

  if (npt == 0) {
    (*pGC->ops->PolyPoint) (pDrawable, pGC, mode, npt, pts);
    return;
  }

  int minX = pts[0].x;
  int maxX = pts[0].x;
  int minY = pts[0].y;
  int maxY = pts[0].y;

  if (mode == CoordModePrevious) {
    int x = pts[0].x;
    int y = pts[0].y;

    for (int i = 1; i < npt; i++) {
      x += pts[i].x;
      y += pts[i].y;
      if (x < minX) minX = x;
      if (x > maxX) maxX = x;
      if (y < minY) minY = y;
      if (y > maxY) maxY = y;
    }
  } else {
    for (int i = 1; i < npt; i++) {
      if (pts[i].x < minX) minX = pts[i].x;
      if (pts[i].x > maxX) maxX = pts[i].x;
      if (pts[i].y < minY) minY = pts[i].y;
      if (pts[i].y > maxY) maxY = pts[i].y;
    }
  }

  BoxRec box;
  box.x1 = minX + pDrawable->x;
  box.y1 = minY + pDrawable->y;
  box.x2 = maxX + 1 + pDrawable->x;
  box.y2 = maxY + 1 + pDrawable->y;

  RegionHelper changed(pScreen, &box, 0);

  REGION_INTERSECT(pScreen, changed.reg, changed.reg, COMPOSITE_CLIP(pGC));

  (*pGC->ops->PolyPoint) (pDrawable, pGC, mode, npt, pts);

  vncHooksScreen->desktop->add_changed(changed.reg);
}

// Polylines - changed region is the union of the bounding rects of each line,
// clipped by pCompositeClip.  If there are more than MAX_RECTS_PER_OP lines,
// just use the bounding rect of all the lines.

static void vncHooksPolylines(DrawablePtr pDrawable, GCPtr pGC, int mode,
                              int npt, DDXPointPtr ppts)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, Polylines);

  if (npt == 0) {
    (*pGC->ops->Polylines) (pDrawable, pGC, mode, npt, ppts);
    return;
  }

  int nRegRects = npt - 1;
  xRectangle regRects[MAX_RECTS_PER_OP];

  int lw = pGC->lineWidth;
  if (lw == 0) lw = 1;

  if (npt == 1)
  {
    // a single point
    nRegRects = 1;
    regRects[0].x = pDrawable->x + ppts[0].x - lw;
    regRects[0].y = pDrawable->y + ppts[0].y - lw;
    regRects[0].width = 2*lw;
    regRects[0].height = 2*lw;
  }
  else
  {
    /*
     * mitered joins can project quite a way from
     * the line end; the 11 degree miter limit limits
     * this extension to lw / (2 * tan(11/2)), rounded up
     * and converted to int yields 6 * lw
     */

    int extra = lw / 2;
    if (pGC->joinStyle == JoinMiter) {
      extra = 6 * lw;
    }

    int prevX, prevY, curX, curY;
    int rectX1, rectY1, rectX2, rectY2;
    int minX, minY, maxX, maxY;

    prevX = ppts[0].x + pDrawable->x;
    prevY = ppts[0].y + pDrawable->y;
    minX = maxX = prevX;
    minY = maxY = prevY;

    for (int i = 0; i < nRegRects; i++) {
      if (mode == CoordModeOrigin) {
        curX = pDrawable->x + ppts[i+1].x;
        curY = pDrawable->y + ppts[i+1].y;
      } else {
        curX = prevX + ppts[i+1].x;
        curY = prevY + ppts[i+1].y;
      }

      if (prevX > curX) {
        rectX1 = curX - extra;
        rectX2 = prevX + extra + 1;
      } else {
        rectX1 = prevX - extra;
        rectX2 = curX + extra + 1;
      }

      if (prevY > curY) {
        rectY1 = curY - extra;
        rectY2 = prevY + extra + 1;
      } else {
        rectY1 = prevY - extra;
        rectY2 = curY + extra + 1;
      }

      if (nRegRects <= MAX_RECTS_PER_OP) {
        regRects[i].x = rectX1;
        regRects[i].y = rectY1;
        regRects[i].width = rectX2 - rectX1;
        regRects[i].height = rectY2 - rectY1;
      } else {
        if (rectX1 < minX) minX = rectX1;
        if (rectY1 < minY) minY = rectY1;
        if (rectX2 > maxX) maxX = rectX2;
        if (rectY2 > maxY) maxY = rectY2;
      }

      prevX = curX;
      prevY = curY;
    }

    if (nRegRects > MAX_RECTS_PER_OP) {
      regRects[0].x = minX;
      regRects[0].y = minY;
      regRects[0].width = maxX - minX;
      regRects[0].height = maxY - minY;
      nRegRects = 1;
    }
  }

  RegionHelper changed(pScreen, nRegRects, regRects);

  REGION_INTERSECT(pScreen, changed.reg, changed.reg, COMPOSITE_CLIP(pGC));

  (*pGC->ops->Polylines) (pDrawable, pGC, mode, npt, ppts);

  vncHooksScreen->desktop->add_changed(changed.reg);
}

// PolySegment - changed region is the union of the bounding rects of each
// segment, clipped by pCompositeClip.  If there are more than MAX_RECTS_PER_OP
// segments, just use the bounding rect of all the segments.

static void vncHooksPolySegment(DrawablePtr pDrawable, GCPtr pGC, int nseg,
                                xSegment *segs)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, PolySegment);

  if (nseg == 0) {
    (*pGC->ops->PolySegment) (pDrawable, pGC, nseg, segs);
    return;
  }

  xRectangle regRects[MAX_RECTS_PER_OP];
  int nRegRects = nseg;

  int lw = pGC->lineWidth;
  int extra = lw / 2;

  int rectX1, rectY1, rectX2, rectY2;
  int minX, minY, maxX, maxY;

  minX = maxX = segs[0].x1;
  minY = maxY = segs[0].y1;

  for (int i = 0; i < nseg; i++) {
    if (segs[i].x1 > segs[i].x2) {
      rectX1 = pDrawable->x + segs[i].x2 - extra;
      rectX2 = pDrawable->x + segs[i].x1 + extra + 1;
    } else {
      rectX1 = pDrawable->x + segs[i].x1 - extra;
      rectX2 = pDrawable->x + segs[i].x2 + extra + 1;
    }

    if (segs[i].y1 > segs[i].y2) {
      rectY1 = pDrawable->y + segs[i].y2 - extra;
      rectY2 = pDrawable->y + segs[i].y1 + extra + 1;
    } else {
      rectY1 = pDrawable->y + segs[i].y1 - extra;
      rectY2 = pDrawable->y + segs[i].y2 + extra + 1;
    }

    if (nseg <= MAX_RECTS_PER_OP) {
      regRects[i].x = rectX1;
      regRects[i].y = rectY1;
      regRects[i].width = rectX2 - rectX1;
      regRects[i].height = rectY2 - rectY1;
    } else {
      if (rectX1 < minX) minX = rectX1;
      if (rectY1 < minY) minY = rectY1;
      if (rectX2 > maxX) maxX = rectX2;
      if (rectY2 > maxY) maxY = rectY2;
    }
  }

  if (nseg > MAX_RECTS_PER_OP) {
    regRects[0].x = minX;
    regRects[0].y = minY;
    regRects[0].width = maxX - minX;
    regRects[0].height = maxY - minY;
    nRegRects = 1;
  }

  RegionHelper changed(pScreen, nRegRects, regRects);

  REGION_INTERSECT(pScreen, changed.reg, changed.reg, COMPOSITE_CLIP(pGC));

  (*pGC->ops->PolySegment) (pDrawable, pGC, nseg, segs);

  vncHooksScreen->desktop->add_changed(changed.reg);
}

// PolyRectangle - changed region is the union of the bounding rects around
// each side of the outline rectangles, clipped by pCompositeClip.  If there
// are more than MAX_RECTS_PER_OP rectangles, just use the bounding rect of all
// the rectangles.

static void vncHooksPolyRectangle(DrawablePtr pDrawable, GCPtr pGC, int nrects,
                                  xRectangle *rects)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, PolyRectangle);

  if (nrects == 0) {
    (*pGC->ops->PolyRectangle) (pDrawable, pGC, nrects, rects);
    return;
  }

  xRectangle regRects[MAX_RECTS_PER_OP*4];
  int nRegRects = nrects * 4;

  int lw = pGC->lineWidth;
  int extra = lw / 2;

  int rectX1, rectY1, rectX2, rectY2;
  int minX, minY, maxX, maxY;

  minX = maxX = rects[0].x;
  minY = maxY = rects[0].y;

  for (int i = 0; i < nrects; i++) {
    if (nrects <= MAX_RECTS_PER_OP) {
      regRects[i*4].x = rects[i].x - extra + pDrawable->x;
      regRects[i*4].y = rects[i].y - extra + pDrawable->y;
      regRects[i*4].width = rects[i].width + 1 + 2 * extra;
      regRects[i*4].height = 1 + 2 * extra;

      regRects[i*4+1].x = rects[i].x - extra + pDrawable->x;
      regRects[i*4+1].y = rects[i].y - extra + pDrawable->y;
      regRects[i*4+1].width = 1 + 2 * extra;
      regRects[i*4+1].height = rects[i].height + 1 + 2 * extra;

      regRects[i*4+2].x = rects[i].x + rects[i].width - extra + pDrawable->x;
      regRects[i*4+2].y = rects[i].y - extra + pDrawable->y;
      regRects[i*4+2].width = 1 + 2 * extra;
      regRects[i*4+2].height = rects[i].height + 1 + 2 * extra;

      regRects[i*4+3].x = rects[i].x - extra + pDrawable->x;
      regRects[i*4+3].y = rects[i].y + rects[i].height - extra + pDrawable->y;
      regRects[i*4+3].width = rects[i].width + 1 + 2 * extra;
      regRects[i*4+3].height = 1 + 2 * extra;
    } else {
      rectX1 = pDrawable->x + rects[i].x - extra;
      rectY1 = pDrawable->y + rects[i].y - extra;
      rectX2 = pDrawable->x + rects[i].x + rects[i].width + extra+1;
      rectY2 = pDrawable->y + rects[i].y + rects[i].height + extra+1;
      if (rectX1 < minX) minX = rectX1;
      if (rectY1 < minY) minY = rectY1;
      if (rectX2 > maxX) maxX = rectX2;
      if (rectY2 > maxY) maxY = rectY2;
    }
  }

  if (nrects > MAX_RECTS_PER_OP) {
    regRects[0].x = minX;
    regRects[0].y = minY;
    regRects[0].width = maxX - minX;
    regRects[0].height = maxY - minY;
    nRegRects = 1;
  }

  RegionHelper changed(pScreen, nRegRects, regRects);

  REGION_INTERSECT(pScreen, changed.reg, changed.reg, COMPOSITE_CLIP(pGC));

  (*pGC->ops->PolyRectangle) (pDrawable, pGC, nrects, rects);

  vncHooksScreen->desktop->add_changed(changed.reg);
}

// PolyArc - changed region is the union of bounding rects around each arc,
// clipped by pCompositeClip.  If there are more than MAX_RECTS_PER_OP
// arcs, just use the bounding rect of all the arcs.

static void vncHooksPolyArc(DrawablePtr pDrawable, GCPtr pGC, int narcs,
                            xArc *arcs)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, PolyArc);

  if (narcs == 0) {
    (*pGC->ops->PolyArc) (pDrawable, pGC, narcs, arcs);
    return;
  }

  xRectangle regRects[MAX_RECTS_PER_OP];
  int nRegRects = narcs;

  int lw = pGC->lineWidth;
  if (lw == 0) lw = 1;
  int extra = lw / 2;

  int rectX1, rectY1, rectX2, rectY2;
  int minX, minY, maxX, maxY;

  minX = maxX = arcs[0].x;
  minY = maxY = arcs[0].y;

  for (int i = 0; i < narcs; i++) {
    if (narcs <= MAX_RECTS_PER_OP) {
      regRects[i].x = arcs[i].x - extra + pDrawable->x;
      regRects[i].y = arcs[i].y - extra + pDrawable->y;
      regRects[i].width = arcs[i].width + lw;
      regRects[i].height = arcs[i].height + lw;
    } else {
      rectX1 = pDrawable->x + arcs[i].x - extra;
      rectY1 = pDrawable->y + arcs[i].y - extra;
      rectX2 = pDrawable->x + arcs[i].x + arcs[i].width + lw;
      rectY2 = pDrawable->y + arcs[i].y + arcs[i].height + lw;
      if (rectX1 < minX) minX = rectX1;
      if (rectY1 < minY) minY = rectY1;
      if (rectX2 > maxX) maxX = rectX2;
      if (rectY2 > maxY) maxY = rectY2;
    }
  }

  if (narcs > MAX_RECTS_PER_OP) {
    regRects[0].x = minX;
    regRects[0].y = minY;
    regRects[0].width = maxX - minX;
    regRects[0].height = maxY - minY;
    nRegRects = 1;
  }

  RegionHelper changed(pScreen, nRegRects, regRects);

  REGION_INTERSECT(pScreen, changed.reg, changed.reg, COMPOSITE_CLIP(pGC));

  (*pGC->ops->PolyArc) (pDrawable, pGC, narcs, arcs);

  vncHooksScreen->desktop->add_changed(changed.reg);
}