+++ /dev/null
-/*
- * scale.c - deal with server-side scaling.
- */
-
-/*
- * Copyright (C) 2005 Rohit Kumar, Johannes E. Schindelin
- * Copyright (C) 2002 RealVNC Ltd.
- * OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
- * Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
- * All Rights Reserved.
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
-#ifdef __STRICT_ANSI__
-#define _BSD_SOURCE
-#endif
-#include <string.h>
-#include <rfb/rfb.h>
-#include <rfb/rfbregion.h>
-#include "private.h"
-
-#ifdef LIBVNCSERVER_HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-
-#ifdef WIN32
-#define write(sock,buf,len) send(sock,buf,len,0)
-#else
-#ifdef LIBVNCSERVER_HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <pwd.h>
-#ifdef LIBVNCSERVER_HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef LIBVNCSERVER_HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#endif
-#endif
-
-#ifdef CORBA
-#include <vncserverctrl.h>
-#endif
-
-#ifdef DEBUGPROTO
-#undef DEBUGPROTO
-#define DEBUGPROTO(x) x
-#else
-#define DEBUGPROTO(x)
-#endif
-
-/****************************/
-#define CEIL(x) ( (double) ((int) (x)) == (x) ? \
- (double) ((int) (x)) : (double) ((int) (x) + 1) )
-#define FLOOR(x) ( (double) ((int) (x)) )
-
-
-int ScaleX(rfbScreenInfoPtr from, rfbScreenInfoPtr to, int x)
-{
- if ((from==to) || (from==NULL) || (to==NULL)) return x;
- return ((int)(((double) x / (double)from->width) * (double)to->width ));
-}
-
-int ScaleY(rfbScreenInfoPtr from, rfbScreenInfoPtr to, int y)
-{
- if ((from==to) || (from==NULL) || (to==NULL)) return y;
- return ((int)(((double) y / (double)from->height) * (double)to->height ));
-}
-
-/* So, all of the encodings point to the ->screen->frameBuffer,
- * We need to change this!
- */
-void rfbScaledCorrection(rfbScreenInfoPtr from, rfbScreenInfoPtr to, int *x, int *y, int *w, int *h, char *function)
-{
- double x1,y1,w1,h1, x2, y2, w2, h2;
- double scaleW = ((double) to->width) / ((double) from->width);
- double scaleH = ((double) to->height) / ((double) from->height);
-
-
- /*
- * rfbLog("rfbScaledCorrection(%p -> %p, %dx%d->%dx%d (%dXx%dY-%dWx%dH)\n",
- * from, to, from->width, from->height, to->width, to->height, *x, *y, *w, *h);
- */
-
- /* If it's the original framebuffer... */
- if (from==to) return;
-
- x1 = ((double) *x) * scaleW;
- y1 = ((double) *y) * scaleH;
- w1 = ((double) *w) * scaleW;
- h1 = ((double) *h) * scaleH;
-
-
- /*cast from double to int is same as "*x = floor(x1);" */
- x2 = FLOOR(x1);
- y2 = FLOOR(y1);
-
- /* include into W and H the jitter of scaling X and Y */
- w2 = CEIL(w1 + ( x1 - x2 ));
- h2 = CEIL(h1 + ( y1 - y2 ));
-
- /*
- * rfbLog("%s (%dXx%dY-%dWx%dH -> %fXx%fY-%fWx%fH) {%dWx%dH -> %dWx%dH}\n",
- * function, *x, *y, *w, *h, x2, y2, w2, h2,
- * from->width, from->height, to->width, to->height);
- */
-
- /* simulate ceil() without math library */
- *x = (int)x2;
- *y = (int)y2;
- *w = (int)w2;
- *h = (int)h2;
-
- /* Small changes for a thumbnail may be scaled to zero */
- if (*w==0) (*w)++;
- if (*h==0) (*h)++;
- /* scaling from small to big may overstep the size a bit */
- if (*x+*w > to->width) *w=to->width - *x;
- if (*y+*h > to->height) *h=to->height - *y;
-}
-
-void rfbScaledScreenUpdateRect(rfbScreenInfoPtr screen, rfbScreenInfoPtr ptr, int x0, int y0, int w0, int h0)
-{
- int x,y,w,v,z;
- int x1, y1, w1, h1;
- int bitsPerPixel, bytesPerPixel, bytesPerLine, areaX, areaY, area2;
- unsigned char *srcptr, *dstptr;
-
- /* Nothing to do!!! */
- if (screen==ptr) return;
-
- x1 = x0;
- y1 = y0;
- w1 = w0;
- h1 = h0;
-
- rfbScaledCorrection(screen, ptr, &x1, &y1, &w1, &h1, "rfbScaledScreenUpdateRect");
- x0 = ScaleX(ptr, screen, x1);
- y0 = ScaleY(ptr, screen, y1);
- w0 = ScaleX(ptr, screen, w1);
- h0 = ScaleY(ptr, screen, h1);
-
- bitsPerPixel = screen->bitsPerPixel;
- bytesPerPixel = bitsPerPixel / 8;
- bytesPerLine = w1 * bytesPerPixel;
- srcptr = (unsigned char *)(screen->frameBuffer +
- (y0 * screen->paddedWidthInBytes + x0 * bytesPerPixel));
- dstptr = (unsigned char *)(ptr->frameBuffer +
- ( y1 * ptr->paddedWidthInBytes + x1 * bytesPerPixel));
- /* The area of the source framebuffer for each destination pixel */
- areaX = ScaleX(ptr,screen,1);
- areaY = ScaleY(ptr,screen,1);
- area2 = areaX*areaY;
-
-
- /* Ensure that we do not go out of bounds */
- if ((x1+w1) > (ptr->width))
- {
- if (x1==0) w1=ptr->width; else x1 = ptr->width - w1;
- }
- if ((y1+h1) > (ptr->height))
- {
- if (y1==0) h1=ptr->height; else y1 = ptr->height - h1;
- }
- /*
- * rfbLog("rfbScaledScreenUpdateRect(%dXx%dY-%dWx%dH -> %dXx%dY-%dWx%dH <%dx%d>) {%dWx%dH -> %dWx%dH} 0x%p\n",
- * x0, y0, w0, h0, x1, y1, w1, h1, areaX, areaY,
- * screen->width, screen->height, ptr->width, ptr->height, ptr->frameBuffer);
- */
-
- if (screen->serverFormat.trueColour) { /* Blend neighbouring pixels together */
- unsigned char *srcptr2;
- unsigned long pixel_value, red, green, blue;
- unsigned int redShift = screen->serverFormat.redShift;
- unsigned int greenShift = screen->serverFormat.greenShift;
- unsigned int blueShift = screen->serverFormat.blueShift;
- unsigned long redMax = screen->serverFormat.redMax;
- unsigned long greenMax = screen->serverFormat.greenMax;
- unsigned long blueMax = screen->serverFormat.blueMax;
-
- /* for each *destination* pixel... */
- for (y = 0; y < h1; y++) {
- for (x = 0; x < w1; x++) {
- red = green = blue = 0;
- /* Get the totals for rgb from the source grid... */
- for (w = 0; w < areaX; w++) {
- for (v = 0; v < areaY; v++) {
- srcptr2 = &srcptr[(((x * areaX) + w) * bytesPerPixel) +
- (v * screen->paddedWidthInBytes)];
- pixel_value = 0;
-
-
- switch (bytesPerPixel) {
- case 4: pixel_value = *((unsigned int *)srcptr2); break;
- case 2: pixel_value = *((unsigned short *)srcptr2); break;
- case 1: pixel_value = *((unsigned char *)srcptr2); break;
- default:
- /* fixme: endianess problem? */
- for (z = 0; z < bytesPerPixel; z++)
- pixel_value += (srcptr2[z] << (8 * z));
- break;
- }
- /*
- srcptr2 += bytesPerPixel;
- */
-
- red += ((pixel_value >> redShift) & redMax);
- green += ((pixel_value >> greenShift) & greenMax);
- blue += ((pixel_value >> blueShift) & blueMax);
-
- }
- }
- /* We now have a total for all of the colors, find the average! */
- red /= area2;
- green /= area2;
- blue /= area2;
- /* Stuff the new value back into memory */
- pixel_value = ((red & redMax) << redShift) | ((green & greenMax) << greenShift) | ((blue & blueMax) << blueShift);
-
- switch (bytesPerPixel) {
- case 4: *((unsigned int *)dstptr) = (unsigned int) pixel_value; break;
- case 2: *((unsigned short *)dstptr) = (unsigned short) pixel_value; break;
- case 1: *((unsigned char *)dstptr) = (unsigned char) pixel_value; break;
- default:
- /* fixme: endianess problem? */
- for (z = 0; z < bytesPerPixel; z++)
- dstptr[z]=(pixel_value >> (8 * z)) & 0xff;
- break;
- }
- dstptr += bytesPerPixel;
- }
- srcptr += (screen->paddedWidthInBytes * areaY);
- dstptr += (ptr->paddedWidthInBytes - bytesPerLine);
- }
- } else
- { /* Not truecolour, so we can't blend. Just use the top-left pixel instead */
- for (y = y1; y < (y1+h1); y++) {
- for (x = x1; x < (x1+w1); x++)
- memcpy (&ptr->frameBuffer[(y *ptr->paddedWidthInBytes) + (x * bytesPerPixel)],
- &screen->frameBuffer[(y * areaY * screen->paddedWidthInBytes) + (x *areaX * bytesPerPixel)], bytesPerPixel);
- }
- }
-}
-
-void rfbScaledScreenUpdate(rfbScreenInfoPtr screen, int x1, int y1, int x2, int y2)
-{
- /* ok, now the task is to update each and every scaled version of the framebuffer
- * and we only have to do this for this specific changed rectangle!
- */
- rfbScreenInfoPtr ptr;
- int count=0;
-
- /* We don't point to cl->screen as it is the original */
- for (ptr=screen->scaledScreenNext;ptr!=NULL;ptr=ptr->scaledScreenNext)
- {
- /* Only update if it has active clients... */
- if (ptr->scaledScreenRefCount>0)
- {
- rfbScaledScreenUpdateRect(screen, ptr, x1, y1, x2-x1, y2-y1);
- count++;
- }
- }
-}
-
-/* Create a new scaled version of the framebuffer */
-rfbScreenInfoPtr rfbScaledScreenAllocate(rfbClientPtr cl, int width, int height)
-{
- rfbScreenInfoPtr ptr;
- ptr = malloc(sizeof(rfbScreenInfo));
- if (ptr!=NULL)
- {
- /* copy *everything* (we don't use most of it, but just in case) */
- memcpy(ptr, cl->screen, sizeof(rfbScreenInfo));
- ptr->width = width;
- ptr->height = height;
- ptr->paddedWidthInBytes = (ptr->bitsPerPixel/8)*ptr->width;
-
- /* Need to by multiples of 4 for Sparc systems */
- ptr->paddedWidthInBytes += (ptr->paddedWidthInBytes % 4);
-
- /* Reset the reference count to 0! */
- ptr->scaledScreenRefCount = 0;
-
- ptr->sizeInBytes = ptr->paddedWidthInBytes * ptr->height;
- ptr->serverFormat = cl->screen->serverFormat;
-
- ptr->frameBuffer = malloc(ptr->sizeInBytes);
- if (ptr->frameBuffer!=NULL)
- {
- /* Reset to a known condition: scale the entire framebuffer */
- rfbScaledScreenUpdateRect(cl->screen, ptr, 0, 0, cl->screen->width, cl->screen->height);
- /* Now, insert into the chain */
- LOCK(cl->updateMutex);
- ptr->scaledScreenNext = cl->screen->scaledScreenNext;
- cl->screen->scaledScreenNext = ptr;
- UNLOCK(cl->updateMutex);
- }
- else
- {
- /* Failed to malloc the new frameBuffer, cleanup */
- free(ptr);
- ptr=NULL;
- }
- }
- return ptr;
-}
-
-/* Find an active scaled version of the framebuffer
- * TODO: implement a refcount per scaled screen to prevent
- * unreferenced scaled screens from hanging around
- */
-rfbScreenInfoPtr rfbScalingFind(rfbClientPtr cl, int width, int height)
-{
- rfbScreenInfoPtr ptr;
- /* include the original in the search (ie: fine 1:1 scaled version of the frameBuffer) */
- for (ptr=cl->screen; ptr!=NULL; ptr=ptr->scaledScreenNext)
- {
- if ((ptr->width==width) && (ptr->height==height))
- return ptr;
- }
- return NULL;
-}
-
-/* Future needs "scale to 320x240, as that's the client's screen size */
-void rfbScalingSetup(rfbClientPtr cl, int width, int height)
-{
- rfbScreenInfoPtr ptr;
-
- ptr = rfbScalingFind(cl,width,height);
- if (ptr==NULL)
- ptr = rfbScaledScreenAllocate(cl,width,height);
- /* Now, there is a new screen available (if ptr is not NULL) */
- if (ptr!=NULL)
- {
- /* Update it! */
- if (ptr->scaledScreenRefCount<1)
- rfbScaledScreenUpdateRect(cl->screen, ptr, 0, 0, cl->screen->width, cl->screen->height);
- /*
- * rfbLog("Taking one from %dx%d-%d and adding it to %dx%d-%d\n",
- * cl->scaledScreen->width, cl->scaledScreen->height,
- * cl->scaledScreen->scaledScreenRefCount,
- * ptr->width, ptr->height, ptr->scaledScreenRefCount);
- */
-
- LOCK(cl->updateMutex);
- cl->scaledScreen->scaledScreenRefCount--;
- ptr->scaledScreenRefCount++;
- cl->scaledScreen=ptr;
- cl->newFBSizePending = TRUE;
- UNLOCK(cl->updateMutex);
-
- rfbLog("Scaling to %dx%d (refcount=%d)\n",width,height,ptr->scaledScreenRefCount);
- }
- else
- rfbLog("Scaling to %dx%d failed, leaving things alone\n",width,height);
-}
-
-int rfbSendNewScaleSize(rfbClientPtr cl)
-{
- /* if the client supports newFBsize Encoding, use it */
- if (cl->useNewFBSize && cl->newFBSizePending)
- return FALSE;
-
- LOCK(cl->updateMutex);
- cl->newFBSizePending = FALSE;
- UNLOCK(cl->updateMutex);
-
- if (cl->PalmVNC==TRUE)
- {
- rfbPalmVNCReSizeFrameBufferMsg pmsg;
- pmsg.type = rfbPalmVNCReSizeFrameBuffer;
- pmsg.pad1 = 0;
- pmsg.desktop_w = Swap16IfLE(cl->screen->width);
- pmsg.desktop_h = Swap16IfLE(cl->screen->height);
- pmsg.buffer_w = Swap16IfLE(cl->scaledScreen->width);
- pmsg.buffer_h = Swap16IfLE(cl->scaledScreen->height);
- pmsg.pad2 = 0;
-
- rfbLog("Sending a response to a PalmVNC style frameuffer resize event (%dx%d)\n", cl->scaledScreen->width, cl->scaledScreen->height);
- if (rfbWriteExact(cl, (char *)&pmsg, sz_rfbPalmVNCReSizeFrameBufferMsg) < 0) {
- rfbLogPerror("rfbNewClient: write");
- rfbCloseClient(cl);
- rfbClientConnectionGone(cl);
- return FALSE;
- }
- }
- else
- {
- rfbResizeFrameBufferMsg rmsg;
- rmsg.type = rfbResizeFrameBuffer;
- rmsg.pad1=0;
- rmsg.framebufferWidth = Swap16IfLE(cl->scaledScreen->width);
- rmsg.framebufferHeigth = Swap16IfLE(cl->scaledScreen->height);
- rfbLog("Sending a response to a UltraVNC style frameuffer resize event (%dx%d)\n", cl->scaledScreen->width, cl->scaledScreen->height);
- if (rfbWriteExact(cl, (char *)&rmsg, sz_rfbResizeFrameBufferMsg) < 0) {
- rfbLogPerror("rfbNewClient: write");
- rfbCloseClient(cl);
- rfbClientConnectionGone(cl);
- return FALSE;
- }
- }
- return TRUE;
-}
-/****************************/
projects / presencevnc / blobdiff