vnchooks.cc

Informix Table extraction queries have been optimized

// FillPolygon - changed region is the bounding rect around the polygon,
// clipped by pCompositeClip

static void vncHooksFillPolygon(DrawablePtr pDrawable, GCPtr pGC, int shape,
                                int mode, int count, DDXPointPtr pts)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, FillPolygon);

  if (count == 0) {
    (*pGC->ops->FillPolygon) (pDrawable, pGC, shape, mode, count, 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 < count; 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 < count; 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->FillPolygon) (pDrawable, pGC, shape, mode, count, pts);

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

// PolyFillRect - changed region is the union of the 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 vncHooksPolyFillRect(DrawablePtr pDrawable, GCPtr pGC, int nrects,
                                 xRectangle *rects)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, PolyFillRect);

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

  xRectangle regRects[MAX_RECTS_PER_OP];
  int nRegRects = nrects;
  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].x = rects[i].x + pDrawable->x;
      regRects[i].y = rects[i].y + pDrawable->y;
      regRects[i].width = rects[i].width;
      regRects[i].height = rects[i].height;
    } else {
      rectX1 = pDrawable->x + rects[i].x;
      rectY1 = pDrawable->y + rects[i].y;
      rectX2 = pDrawable->x + rects[i].x + rects[i].width;
      rectY2 = pDrawable->y + rects[i].y + rects[i].height;
      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->PolyFillRect) (pDrawable, pGC, nrects, rects);

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

// PolyFillArc - 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 vncHooksPolyFillArc(DrawablePtr pDrawable, GCPtr pGC, int narcs,
                                xArc *arcs)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, PolyFillArc);

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

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

// GetTextBoundingRect - calculate a bounding rectangle around n chars of a
// font.  Not particularly accurate, but good enough.

static void GetTextBoundingRect(DrawablePtr pDrawable, FontPtr font, int x,
                                int y, int nchars, BoxPtr box)
{
  int ascent = __rfbmax(FONTASCENT(font), FONTMAXBOUNDS(font, ascent));
  int descent = __rfbmax(FONTDESCENT(font), FONTMAXBOUNDS(font, descent));
  int charWidth = __rfbmax(FONTMAXBOUNDS(font,rightSideBearing),
                           FONTMAXBOUNDS(font,characterWidth));

  box->x1 = pDrawable->x + x;
  box->y1 = pDrawable->y + y - ascent;
  box->x2 = box->x1 + charWidth * nchars;
  box->y2 = box->y1 + ascent + descent;

  if (FONTMINBOUNDS(font,leftSideBearing) < 0)
    box->x1 += FONTMINBOUNDS(font,leftSideBearing);
}

// PolyText8 - changed region is bounding rect around count chars, clipped by
// pCompositeClip

static int vncHooksPolyText8(DrawablePtr pDrawable, GCPtr pGC, int x, int y,
                             int count, char *chars)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, PolyText8);

  if (count == 0)
    return (*pGC->ops->PolyText8) (pDrawable, pGC, x, y, count, chars);

  BoxRec box;
  GetTextBoundingRect(pDrawable, pGC->font, x, y, count, &box);

  RegionHelper changed(pScreen, &box, 0);

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

  int ret = (*pGC->ops->PolyText8) (pDrawable, pGC, x, y, count, chars);

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

  return ret;
}

// PolyText16 - changed region is bounding rect around count chars, clipped by
// pCompositeClip

static int vncHooksPolyText16(DrawablePtr pDrawable, GCPtr pGC, int x, int y,
                              int count, unsigned short *chars)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, PolyText16);

  if (count == 0)
    return (*pGC->ops->PolyText16) (pDrawable, pGC, x, y, count, chars);

  BoxRec box;
  GetTextBoundingRect(pDrawable, pGC->font, x, y, count, &box);

  RegionHelper changed(pScreen, &box, 0);

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

  int ret = (*pGC->ops->PolyText16) (pDrawable, pGC, x, y, count, chars);

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

  return ret;
}

// ImageText8 - changed region is bounding rect around count chars, clipped by
// pCompositeClip

static void vncHooksImageText8(DrawablePtr pDrawable, GCPtr pGC, int x, int y,
                               int count, char *chars)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, ImageText8);

  if (count == 0) {
    (*pGC->ops->ImageText8) (pDrawable, pGC, x, y, count, chars);
    return;
  }

  BoxRec box;
  GetTextBoundingRect(pDrawable, pGC->font, x, y, count, &box);

  RegionHelper changed(pScreen, &box, 0);

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

  (*pGC->ops->ImageText8) (pDrawable, pGC, x, y, count, chars);

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

// ImageText16 - changed region is bounding rect around count chars, clipped by
// pCompositeClip

static void vncHooksImageText16(DrawablePtr pDrawable, GCPtr pGC, int x, int y,
                                int count, unsigned short *chars)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, ImageText16);

  if (count == 0) {
    (*pGC->ops->ImageText16) (pDrawable, pGC, x, y, count, chars);
    return;
  }

  BoxRec box;
  GetTextBoundingRect(pDrawable, pGC->font, x, y, count, &box);

  RegionHelper changed(pScreen, &box, 0);

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

  (*pGC->ops->ImageText16) (pDrawable, pGC, x, y, count, chars);

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

// ImageGlyphBlt - changed region is bounding rect around nglyph chars, clipped
// by pCompositeClip

static void vncHooksImageGlyphBlt(DrawablePtr pDrawable, GCPtr pGC, int x,
                                  int y, unsigned int nglyph,
                                  CharInfoPtr *ppci, pointer pglyphBase)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, ImageGlyphBlt);

  if (nglyph == 0) {
    (*pGC->ops->ImageGlyphBlt) (pDrawable, pGC, x, y, nglyph, ppci,pglyphBase);
    return;
  }

  BoxRec box;
  GetTextBoundingRect(pDrawable, pGC->font, x, y, nglyph, &box);

  RegionHelper changed(pScreen, &box, 0);

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

  (*pGC->ops->ImageGlyphBlt) (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);

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

// PolyGlyphBlt - changed region is bounding rect around nglyph chars, clipped
// by pCompositeClip

static void vncHooksPolyGlyphBlt(DrawablePtr pDrawable, GCPtr pGC, int x,
                                 int y, unsigned int nglyph,
                                 CharInfoPtr *ppci, pointer pglyphBase)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, PolyGlyphBlt);

  if (nglyph == 0) {
    (*pGC->ops->PolyGlyphBlt) (pDrawable, pGC, x, y, nglyph, ppci,pglyphBase);
    return;
  }

  BoxRec box;
  GetTextBoundingRect(pDrawable, pGC->font, x, y, nglyph, &box);

  RegionHelper changed(pScreen, &box, 0);

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

  (*pGC->ops->PolyGlyphBlt) (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);

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

// PushPixels - changed region is the given rectangle, clipped by
// pCompositeClip

static void vncHooksPushPixels(GCPtr pGC, PixmapPtr pBitMap,
                               DrawablePtr pDrawable, int w, int h, int x,
                               int y)
{
  GC_OP_UNWRAPPER(pDrawable, pGC, PushPixels);

  BoxRec box;
  box.x1 = x + pDrawable->x;
  box.y1 = y + pDrawable->y;
  box.x2 = box.x1 + w;
  box.y2 = box.y1 + h;

  RegionHelper changed(pScreen, &box, 0);

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

  (*pGC->ops->PushPixels) (pGC, pBitMap, pDrawable, w, h, x, y);

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