// FillPolygon - changed region is the bounding rect around the polygon,// clipped by pCompositeClipstatic 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// pCompositeClipstatic 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// pCompositeClipstatic 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// pCompositeClipstatic 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// pCompositeClipstatic 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 pCompositeClipstatic 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 pCompositeClipstatic 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// pCompositeClipstatic 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);}