271 lines
9.4 KiB
C++
271 lines
9.4 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 "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 "raw.h"
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#define EVENT_CHECK_INVERVAL 10 /* tick count between event checks */
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/* Data on state of raw rectangle drawing routines */
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static unsigned int lineBytes; /* Number of bytes in a line of GS pixels */
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static unsigned long pixels;
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static unsigned int drawingLine; /* Line to be drawn while displaying */
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static BOOLEAN extraByteAdvance;
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static unsigned linesAvailable;
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/* Bytes to skip before or after doing raw drawing */
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static unsigned long preSkip, postSkip;
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/* Buffer to hold all SHR pixel data from one update (defined in tables.asm).
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* Must be big enough: at least (WIN_WIDTH_640/4 + 1) * WIN_HEIGHT. */
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#define DESTBUF_SIZE 0x8001
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extern unsigned char destBuf[];
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static unsigned char *destPtr;
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unsigned char * rawDecode640(unsigned startOffset, unsigned endOffset,
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unsigned char *lineDataPtr);
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unsigned char * rawDecode320(unsigned startOffset, unsigned endOffset,
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unsigned char *lineDataPtr);
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/* Ends drawing of a raw rectangle when it is complete or aborted
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* because the rectangle is not visible.
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*/
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static void StopRawDrawing (void) {
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NextRect(); /* Prepare for next rect */
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}
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#pragma optimize 95 /* To work around an ORCA/C optimizer bug */
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/* Draw one or more lines from a raw rectangle
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*/
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void RawDraw (void) {
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static unsigned char *lineDataPtr;
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unsigned int i; /* Loop indices */
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unsigned char *initialLineDataPtr;
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unsigned char *finalDestPtr;
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static EventRecord eventRec;
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unsigned long eventCheckTime;
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/* For use with GetContentOrigin() */
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Origin contentOrigin;
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eventCheckTime = TickCount() + EVENT_CHECK_INVERVAL;
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SetPort(vncWindow); /* Drawing in VNC window */
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#if 0
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/* Check if what we're drawing is visible, and skip any invisible part
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* by skipping some lines or completely aborting drawing the rectangle.
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*/
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if (checkBounds) {
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Rect drawingRect;
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contentOrigin.l = GetContentOrigin(vncWindow);
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drawingRect.h1 = rectX - contentOrigin.pt.h;
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drawingRect.h2 = rectX - contentOrigin.pt.h + rectWidth;
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drawingRect.v1 = rectY - contentOrigin.pt.v + drawingLine;
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drawingRect.v2 = rectY - contentOrigin.pt.v + rectHeight;
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if (!RectInRgn(&drawingRect, GetVisHandle())) {
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StopRawDrawing();
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return;
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}
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else if (rectY + drawingLine < contentOrigin.pt.v) {
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unsigned linesToSkip = contentOrigin.pt.v - rectY - drawingLine;
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preSkip = linesToSkip * rectWidth;
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destPtr += (unsigned long)lineBytes * linesToSkip;
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drawingLine = contentOrigin.pt.v - rectY;
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if (drawingLine >= rectHeight) { /* Sanity check */
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StopRawDrawing();
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return;
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}
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}
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else if (rectY + rectHeight - 1 > contentOrigin.pt.v + winHeight)
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rectHeight = contentOrigin.pt.v + winHeight - rectY + 1;
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checkBounds = FALSE;
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}
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#endif
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do { /* We short-circuit back to here if there are no events pending */
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unsigned inPixelsA, inPixelsB, outPixels;
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if (linesAvailable == 0) {
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linesAvailable = DoReadMultipleTCP(rectWidth, rectHeight - drawingLine);
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if (linesAvailable) {
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lineDataPtr = readBufferPtr;
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} else {
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return;
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}
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}
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finalDestPtr = destPtr + lineBytes - 1;
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if (hRez == 640) {
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initialLineDataPtr = lineDataPtr;
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lineDataPtr = rawDecode640(destPtr-destBuf, finalDestPtr-destBuf, lineDataPtr);
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destPtr = finalDestPtr;
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*destPtr = pixTransTbl[*(lineDataPtr++)] & 0xC0;
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for (i = lineDataPtr - initialLineDataPtr; i < rectWidth; i++)
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switch (i & 0x03) {
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case 0x01: /* pixels 1, 5, 9, ... */
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*destPtr += pixTransTbl[*(lineDataPtr++)] & 0x30;
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break;
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case 0x02: /* pixels 2, 6, 10, ... */
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*destPtr += pixTransTbl[*(lineDataPtr++)] & 0x0C;
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break;
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case 0x03: /* pixels 3, 7, 11, ... */
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*destPtr += pixTransTbl[*(lineDataPtr++)] & 0x03;
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}
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destPtr++;
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}
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else { /* 320 mode */
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lineDataPtr = rawDecode320(destPtr-destBuf, finalDestPtr-destBuf, lineDataPtr);
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destPtr = finalDestPtr;
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/* Final byte to produce */
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*destPtr = pixTransTbl[*(lineDataPtr++)] & 0xF0;
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if (extraByteAdvance)
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destPtr++; /* Not ending on byte boundary - update index */
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else
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*(destPtr++) += pixTransTbl[*(lineDataPtr++)] & 0x0F;
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}
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drawingLine++;
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if (pixels > 613 && !(drawingLine & 0x03)) { /* Draw every 4th line */
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srcRect.v2 = drawingLine;
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contentOrigin.l = GetContentOrigin(vncWindow);
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PPToPort(&srcLocInfo, &srcRect, rectX - contentOrigin.pt.h,
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rectY + srcRect.v1 - contentOrigin.pt.v, modeCopy);
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srcRect.v1 = drawingLine;
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}
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/* Check whether we're done with this rectangle */
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if (drawingLine >= rectHeight) {
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/* Draw final rect, if necessary */
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if (drawingLine > srcRect.v1) {
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srcRect.v2 = drawingLine;
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contentOrigin.l = GetContentOrigin(vncWindow);
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PPToPort(&srcLocInfo, &srcRect, rectX - contentOrigin.pt.h,
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rectY + srcRect.v1 - contentOrigin.pt.v, modeCopy);
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}
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StopRawDrawing();
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return;
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}
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linesAvailable--;
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/* Check if there are actually any events that need to be processed.
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* If not, save time by not going through the whole event loop, but
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* instead processing the minimum necessary periodic tasks and then
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* going straight to the next line of data.
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*/
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if (TickCount() >= eventCheckTime) {
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if (EventAvail(0xFFFF, &eventRec))
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return;
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SystemTask(); /* Let periodic Desk Accesories do their things */
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eventCheckTime = eventRec.when + EVENT_CHECK_INVERVAL;
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}
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TCPIPPoll(); /* Let Marinetti keep processing data */
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} while (1);
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}
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#pragma optimize -1
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/* Process rectangle data in raw encoding and write it to screen.
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*/
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void DoRawRect (void) {
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pixels = (unsigned long) rectWidth * rectHeight;
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if (hRez == 640) {
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if (rectWidth & 0x03) { /* Width not an exact multiple of 4 */
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lineBytes = rectWidth/4 + 1;
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}
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else { /* Width is a multiple of 4 */
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lineBytes = rectWidth/4;
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}
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}
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else { /* 320 mode */
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if (rectWidth & 0x01) { /* Width not an exact multiple of 2 */
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lineBytes = rectWidth/2 + 1;
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extraByteAdvance = TRUE;
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}
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else { /* Width is a multiple of 2 */
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lineBytes = rectWidth/2;
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extraByteAdvance = FALSE;
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}
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}
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/* If we get an oversized update, ignore it and ask for another one.
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* Shouldn't normally happen, except possibly if there are outstanding
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* update requests for multiple screen regions due to scrolling.
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*/
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if (lineBytes * rectHeight >= DESTBUF_SIZE) {
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Origin contentOrigin;
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contentOrigin.l = GetContentOrigin(vncWindow);
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SendFBUpdateRequest(FALSE, contentOrigin.pt.h, contentOrigin.pt.v,
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winWidth, winHeight);
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skipBytes = pixels;
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StopRawDrawing();
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return;
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}
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destPtr = destBuf;
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srcLocInfo.ptrToPixImage = destPtr;
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srcLocInfo.width = lineBytes;
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srcLocInfo.boundsRect.v2 = rectHeight;
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/* Since the lines are rounded up to integral numbers of bytes, this
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* padding must be accounted for here.
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*/
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if (hRez == 640) {
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switch (rectWidth & 0x03) {
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case 0x00: srcLocInfo.boundsRect.h2 = rectWidth; break;
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case 0x01: srcLocInfo.boundsRect.h2 = rectWidth+3; break;
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case 0x02: srcLocInfo.boundsRect.h2 = rectWidth+2; break;
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case 0x03: srcLocInfo.boundsRect.h2 = rectWidth+1;
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}
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}
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else {
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switch (rectWidth & 0x01) {
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case 0x00: srcLocInfo.boundsRect.h2 = rectWidth; break;
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case 0x01: srcLocInfo.boundsRect.h2 = rectWidth+1;
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}
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}
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/* Don't include padding in the area we will actually copy over */
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srcRect.h2 = rectWidth;
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srcRect.v1 = 0;
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displayInProgress = TRUE;
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drawingLine = 0; /* Drawing first line of rect */
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linesAvailable = 0; /* No line data read yet */
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checkBounds = TRUE; /* Flag to check bounds when drawing 1st line */
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}
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