mirror of
https://github.com/sheumann/VNCviewGS.git
synced 2024-11-22 02:30:47 +00:00
5c1fc77f9b
This helps avoid issues where the GS may be unable to "catch up" with the stream of FBUpdates, resulting in it continually drawing out-of-date screen data.
384 lines
12 KiB
C++
384 lines
12 KiB
C++
#if __ORCAC__
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#pragma lint -1
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#pragma noroot
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segment "VNCview GS";
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#endif
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#include <window.h>
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#include <quickdraw.h>
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#include <qdaux.h>
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#include <desk.h>
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#include <memory.h>
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#include <resources.h>
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#include <tcpip.h>
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#include <menu.h>
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#include <control.h>
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#include <misctool.h>
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#include <scrap.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <event.h>
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#include <limits.h>
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#include <orca.h>
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#include "vncsession.h"
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#include "vncview.h"
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#include "vncdisplay.h"
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#include "colortables.h"
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#include "readtcp.h"
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#include "menus.h"
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#include "clipboard.h"
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#include "desktopsize.h"
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#include "mouse.h"
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#include "keyboard.h"
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#include "copyrect.h"
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#include "raw.h"
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#include "hextile.h"
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unsigned int fbHeight;
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unsigned int fbWidth;
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BOOLEAN displayInProgress;
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static BOOLEAN peekedNextMsg;
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static unsigned int numRects;
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unsigned int rectX;
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unsigned int rectY;
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unsigned int rectWidth;
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unsigned int rectHeight;
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static unsigned long rectEncoding;
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GrafPortPtr vncWindow;
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/* VNC session window dimensions */
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unsigned int winHeight;
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unsigned int winWidth;
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/* On the next 2 structs, only certain values are permanently zero.
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* Others are changed later.
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*/
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struct LocInfo srcLocInfo = {0, 0, 0, {0, 0, 0, 0} };
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/* Used by multiple encodings */
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Rect srcRect = {0, 0, 0, 0};
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unsigned char *pixTransTbl;
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BOOLEAN checkBounds = FALSE; /* Adjust drawing to stay in bounds */
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unsigned long skipBytes = 0;
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/* Server-to-client message types */
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#define FBUpdate 0
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#define SetColourMapEntries 1
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#define Bell 2
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#define ServerCutText 3
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#define txtColor 10
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#define txtGray 11
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#define txtTransfers 23
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/* Send a request to be sent the data to redraw the window when part of it has
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* been erased. It will be a while before the data is fully redrawn, but this
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* is an unavoidable penalty of opening other windows over the main VNC window.
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*/
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#pragma databank 1
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static void VNCRedraw (void) {
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RegionHndl updateRgnHndl;
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updateRgnHndl = vncWindow->visRgn;
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SendFBUpdateRequest(FALSE,
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(**updateRgnHndl).rgnBBox.h1,
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(**updateRgnHndl).rgnBBox.v1,
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(**updateRgnHndl).rgnBBox.h2 - (**updateRgnHndl).rgnBBox.h1,
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(**updateRgnHndl).rgnBBox.v2 - (**updateRgnHndl).rgnBBox.v1);
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checkBounds = TRUE;
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}
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#pragma databank 0
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/* Change Super Hi-Res display to the specified resolution (640 or 320).
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* Uses the procedure described in IIgs Tech Note #4.
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*/
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static void ChangeResolution(int rez) {
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static Handle dpSpace;
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unsigned int masterSCB;
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hRez = rez;
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winHeight = WIN_HEIGHT;
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winWidth = (rez == 640) ? WIN_WIDTH_640 : WIN_WIDTH_320;
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/* Set up pixel translation table for correct graphics mode */
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if (rez == 320)
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pixTransTbl = coltab320;
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else /* 640 mode */
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pixTransTbl = coltab640;
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srcLocInfo.portSCB = (rez == 640) ? 0x87 : 0x00;
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/* Check if we need to change modes */
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masterSCB = GetMasterSCB();
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if ( ( (masterSCB & 0x80) && (rez == 640)) ||
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(!(masterSCB & 0x80) && (rez == 320)) ) {
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return; /* Already in right mode, so don't change things */
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}
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/* Perform the basic procedure described in IIgs TN #4 */
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CloseAllNDAs();
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QDAuxShutDown();
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QDShutDown();
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if (dpSpace == NULL)
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dpSpace = NewHandle(0x0300, userid(),
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attrLocked|attrFixed|attrNoCross|attrBank, 0x00000000);
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QDStartUp((Word) *dpSpace, (rez == 640) ? 0xC087 : 0xC000, 0, userid());
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/* SCB 0x87 gives 640 mode with our custom gray palette */
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GrafOff();
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QDAuxStartUp();
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ClampMouse(0, (rez == 640) ? 639 : 319, 0, 199);
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HomeMouse();
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ShowCursor();
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WindNewRes();
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InitPalette(); /* Set up Apple menu colors before it is redrawn */
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MenuNewRes();
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CtlNewRes();
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RefreshDesktop(NULL);
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GrafOn();
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/* Position new connection window at default location for new mode */
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if (rez == 320) {
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MoveControl(25, 64, GetCtlHandleFromID(newConnWindow, txtColor));
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MoveControl(25, 87, GetCtlHandleFromID(newConnWindow, txtGray));
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MoveControl(134, 91, GetCtlHandleFromID(newConnWindow, txtTransfers));
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MoveWindow(2, 35, newConnWindow);
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}
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else {
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MoveControl(35, 64, GetCtlHandleFromID(newConnWindow, txtColor));
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MoveControl(35, 87, GetCtlHandleFromID(newConnWindow, txtGray));
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MoveControl(144, 91, GetCtlHandleFromID(newConnWindow, txtTransfers));
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MoveWindow(162, 35, newConnWindow);
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}
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}
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/* Display the VNC session window, first changing to the appropriate
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* resolution (as specified by the user) if necessary.
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*/
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void InitVNCWindow(void) {
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#define wrNum640 1003
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#define wrNum320 1004
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BOOLEAN resize = FALSE;
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ChangeResolution(hRez);
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vncWindow = NewWindow2(NULL, 0, NULL, NULL, 0x02,
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(hRez == 640) ? wrNum640 : wrNum320,
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rWindParam1);
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if (fbWidth < winWidth) {
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winWidth = fbWidth;
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resize = TRUE;
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}
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if (fbHeight < winHeight) {
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winHeight = fbHeight;
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resize = TRUE;
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}
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if (resize)
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SizeWindow(winWidth, winHeight, vncWindow);
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SetContentDraw(VNCRedraw, vncWindow);
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SetDataSize(fbWidth, fbHeight, vncWindow);
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DrawControls(vncWindow);
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/* We also take the opportunity here to initialize the rectangle info. */
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numRects = 0;
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displayInProgress = FALSE;
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peekedNextMsg = FALSE;
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#undef wrNum320
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#undef wrNum640
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}
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/* Send a request to the VNC server to update the information for a portion of
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* the frame buffer.
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*/
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void SendFBUpdateRequest (BOOLEAN incremental, unsigned int x, unsigned int y,
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unsigned int width, unsigned int height) {
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struct FBUpdateRequest {
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unsigned char messageType;
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unsigned char incremental;
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unsigned int x;
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unsigned int y;
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unsigned int width;
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unsigned int height;
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} fbUpdateRequest = {3 /* Message type 3 */};
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fbUpdateRequest.incremental = !!incremental;
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fbUpdateRequest.x = SwapBytes2(x);
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fbUpdateRequest.y = SwapBytes2(y);
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fbUpdateRequest.width = SwapBytes2(width);
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fbUpdateRequest.height = SwapBytes2(height);
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TCPIPWriteTCP(hostIpid, &fbUpdateRequest.messageType,
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sizeof(fbUpdateRequest), TRUE, FALSE);
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/* No error checking here -- Can't respond to one usefully. */
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}
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/* Start responding to a FramebufferUpdate from the server
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*/
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static void DoFBUpdate (void) {
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unsigned int *dataPtr; /* Pointer to header data */
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if (!DoWaitingReadTCP(15)) {
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DoClose(vncWindow);
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//printf("Closing in DoFBUpdate\n");
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return;
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}
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dataPtr = (unsigned int *) (readBufferPtr + 1);
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numRects = SwapBytes2(dataPtr[0]); /* Get data */
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rectX = SwapBytes2(dataPtr[1]);
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rectY = SwapBytes2(dataPtr[2]);
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rectWidth = SwapBytes2(dataPtr[3]);
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rectHeight = SwapBytes2(dataPtr[4]);
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rectEncoding = SwapBytes4(*(unsigned long *)(dataPtr + 5));
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}
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/* The server should never send a color map, since we don't use a mapped
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* representation for pixel values. If a malfunctioning server tries to
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* send us one, though, we read and ignore it.
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*/
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static void DoSetColourMapEntries (void) {
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unsigned int numColors;
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DoWaitingReadTCP(3);
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DoWaitingReadTCP(2);
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numColors = SwapBytes2(*(unsigned int *)readBufferPtr);
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skipBytes = 6UL * numColors;
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}
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/* Skip a specified number of bytes.
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*/
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static void DoSkipBytes (void) {
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if (DoReadTCP(skipBytes)) {
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DoneWithReadBuffer();
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skipBytes = 0;
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}
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}
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/* Here when we're done processing one rectangle and ready to start the next.
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* If last FramebufferUpdate had multiple rectangles, we set up for next one.
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* If no more rectangles are available, we send a FramebufferUpdateRequest.
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*/
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void NextRect (void) {
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unsigned int *dataPtr;
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displayInProgress = FALSE;
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numRects--;
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if (numRects) { /* Process next rectangle */
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if (!DoWaitingReadTCP(12)) {
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//printf("Closing in NextRect\n");
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DoClose(vncWindow);
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return;
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}
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dataPtr = (unsigned int *)readBufferPtr;
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rectX = SwapBytes2(dataPtr[0]);
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rectY = SwapBytes2(dataPtr[1]);
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rectWidth = SwapBytes2(dataPtr[2]);
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rectHeight = SwapBytes2(dataPtr[3]);
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rectEncoding = SwapBytes4(*(unsigned long *)(dataPtr + 4));
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//printf("New Rect: X = %u, Y = %u, Width = %u, Height = %u\n", rectX, rectY, rectWidth, rectHeight);
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}
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else { /* No more rectangles from last update */
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Origin contentOrigin;
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DoneWithReadBuffer();
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if (DoReadTCP(1)) {
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peekedNextMsg = TRUE;
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if (*readBufferPtr == FBUpdate) {
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/* Don't request another FBUpdate if one is already coming.
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* This helps avoid a condition where the GS may be unable
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* to "catch up" with a stream of frequent updates. */
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return;
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}
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}
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contentOrigin.l = GetContentOrigin(vncWindow);
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SendFBUpdateRequest(TRUE, contentOrigin.pt.h, contentOrigin.pt.v,
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winWidth, winHeight);
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}
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}
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void ConnectedEventLoop (void) {
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unsigned char messageType;
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if (FrontWindow() != vncWindow && menuOffset == noKB)
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InitMenus(0);
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else if (FrontWindow() == vncWindow && menuOffset != noKB)
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InitMenus(noKB);
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if (skipBytes) {
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DoSkipBytes();
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return;
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} else if (displayInProgress) {
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switch (rectEncoding) {
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case encodingRaw: RawDraw();
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return;
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case encodingHextile: HexDispatch();
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return;
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case nonEncodingClipboard: GetClipboard();
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return;
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default: DoClose(vncWindow);
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return;
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}
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}
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else if (numRects) {
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switch (rectEncoding) {
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case encodingHextile:
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DoHextileRect();
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return;
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case encodingRaw: DoRawRect();
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return;
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case encodingCopyRect:
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DoCopyRect();
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return;
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case encodingDesktopSize:
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DoDesktopSize();
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return;
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case encodingCursor:
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DoCursor();
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return;
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default: DisplayConnectStatus (
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"\pInvalid rectangle from server.", FALSE);
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DoClose(vncWindow);
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//printf("Closing due to bad rectangle encoding %lu\n", rectEncoding);
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//printf("rectX = %u, rectY = %u, rectWidth = %u, rectHeight = %u\n", rectX, rectY, rectWidth, rectHeight);
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return;
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}
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}
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else if (peekedNextMsg || DoReadTCP(1)) { /* Read message type byte */
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peekedNextMsg = FALSE;
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messageType = *readBufferPtr;
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switch (messageType) {
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case FBUpdate: DoFBUpdate();
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break;
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case SetColourMapEntries: DoSetColourMapEntries();
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break;
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case Bell: SysBeep();
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break;
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case ServerCutText: rectEncoding = nonEncodingClipboard;
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DoServerCutText();
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break;
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default: DisplayConnectStatus (
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"\pInvalid message from server.",
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FALSE);
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DoClose(vncWindow);
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return;
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}
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}
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}
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