+++ /dev/null
-/*
- * translate.c - translate between different pixel formats
- */
-
-/*
- * Copyright (C) 2002 RealVNC Ltd.
- * 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.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "rfb.h"
-
-static void PrintPixelFormat(rfbPixelFormat *pf);
-static Bool rfbSetClientColourMapBGR233();
-
-Bool rfbEconomicTranslate = FALSE;
-
-/*
- * Structure representing pixel format for RFB server (i.e. us).
- */
-
-rfbPixelFormat rfbServerFormat;
-
-
-/*
- * Some standard pixel formats.
- */
-
-static const rfbPixelFormat BGR233Format = {
- 8, 8, 0, 1, 7, 7, 3, 0, 3, 6
-};
-
-
-/*
- * Macro to compare pixel formats.
- */
-
-#define PF_EQ(x,y) \
- ((x.bitsPerPixel == y.bitsPerPixel) && \
- (x.depth == y.depth) && \
- ((x.bigEndian == y.bigEndian) || (x.bitsPerPixel == 8)) && \
- (x.trueColour == y.trueColour) && \
- (!x.trueColour || ((x.redMax == y.redMax) && \
- (x.greenMax == y.greenMax) && \
- (x.blueMax == y.blueMax) && \
- (x.redShift == y.redShift) && \
- (x.greenShift == y.greenShift) && \
- (x.blueShift == y.blueShift))))
-
-#define CONCAT2(a,b) a##b
-#define CONCAT2E(a,b) CONCAT2(a,b)
-#define CONCAT4(a,b,c,d) a##b##c##d
-#define CONCAT4E(a,b,c,d) CONCAT4(a,b,c,d)
-
-#define OUT 8
-#include "tableinittctemplate.c"
-#include "tableinitcmtemplate.c"
-#define IN 8
-#include "tabletranstemplate.c"
-#undef IN
-#define IN 16
-#include "tabletranstemplate.c"
-#undef IN
-#define IN 32
-#include "tabletranstemplate.c"
-#undef IN
-#undef OUT
-
-#define OUT 16
-#include "tableinittctemplate.c"
-#include "tableinitcmtemplate.c"
-#define IN 8
-#include "tabletranstemplate.c"
-#undef IN
-#define IN 16
-#include "tabletranstemplate.c"
-#undef IN
-#define IN 32
-#include "tabletranstemplate.c"
-#undef IN
-#undef OUT
-
-#define OUT 32
-#include "tableinittctemplate.c"
-#include "tableinitcmtemplate.c"
-#define IN 8
-#include "tabletranstemplate.c"
-#undef IN
-#define IN 16
-#include "tabletranstemplate.c"
-#undef IN
-#define IN 32
-#include "tabletranstemplate.c"
-#undef IN
-#undef OUT
-
-typedef void (*rfbInitTableFnType)(char **table, rfbPixelFormat *in,
- rfbPixelFormat *out);
-
-rfbInitTableFnType rfbInitTrueColourSingleTableFns[3] = {
- rfbInitTrueColourSingleTable8,
- rfbInitTrueColourSingleTable16,
- rfbInitTrueColourSingleTable32
-};
-
-rfbInitTableFnType rfbInitColourMapSingleTableFns[3] = {
- rfbInitColourMapSingleTable8,
- rfbInitColourMapSingleTable16,
- rfbInitColourMapSingleTable32
-};
-
-rfbInitTableFnType rfbInitTrueColourRGBTablesFns[3] = {
- rfbInitTrueColourRGBTables8,
- rfbInitTrueColourRGBTables16,
- rfbInitTrueColourRGBTables32
-};
-
-rfbTranslateFnType rfbTranslateWithSingleTableFns[3][3] = {
- { rfbTranslateWithSingleTable8to8,
- rfbTranslateWithSingleTable8to16,
- rfbTranslateWithSingleTable8to32 },
- { rfbTranslateWithSingleTable16to8,
- rfbTranslateWithSingleTable16to16,
- rfbTranslateWithSingleTable16to32 },
- { rfbTranslateWithSingleTable32to8,
- rfbTranslateWithSingleTable32to16,
- rfbTranslateWithSingleTable32to32 }
-};
-
-rfbTranslateFnType rfbTranslateWithRGBTablesFns[3][3] = {
- { rfbTranslateWithRGBTables8to8,
- rfbTranslateWithRGBTables8to16,
- rfbTranslateWithRGBTables8to32 },
- { rfbTranslateWithRGBTables16to8,
- rfbTranslateWithRGBTables16to16,
- rfbTranslateWithRGBTables16to32 },
- { rfbTranslateWithRGBTables32to8,
- rfbTranslateWithRGBTables32to16,
- rfbTranslateWithRGBTables32to32 }
-};
-
-
-
-/*
- * rfbTranslateNone is used when no translation is required.
- */
-
-void
-rfbTranslateNone(char *table, rfbPixelFormat *in, rfbPixelFormat *out,
- char *iptr, char *optr, int bytesBetweenInputLines,
- int width, int height)
-{
- int bytesPerOutputLine = width * (out->bitsPerPixel / 8);
-
- while (height > 0) {
- memcpy(optr, iptr, bytesPerOutputLine);
- iptr += bytesBetweenInputLines;
- optr += bytesPerOutputLine;
- height--;
- }
-}
-
-
-/*
- * rfbSetTranslateFunction sets the translation function.
- */
-
-Bool
-rfbSetTranslateFunction(cl)
- rfbClientPtr cl;
-{
- rfbLog("Pixel format for client %s:\n",cl->host);
- PrintPixelFormat(&cl->format);
-
- /*
- * Check that bits per pixel values are valid
- */
-
- if ((rfbServerFormat.bitsPerPixel != 8) &&
- (rfbServerFormat.bitsPerPixel != 16) &&
- (rfbServerFormat.bitsPerPixel != 32))
- {
- rfbLog("%s: server bits per pixel not 8, 16 or 32\n",
- "rfbSetTranslateFunction");
- rfbCloseSock(cl->sock);
- return FALSE;
- }
-
- if ((cl->format.bitsPerPixel != 8) &&
- (cl->format.bitsPerPixel != 16) &&
- (cl->format.bitsPerPixel != 32))
- {
- rfbLog("%s: client bits per pixel not 8, 16 or 32\n",
- "rfbSetTranslateFunction");
- rfbCloseSock(cl->sock);
- return FALSE;
- }
-
- if (!rfbServerFormat.trueColour && (rfbServerFormat.bitsPerPixel != 8)) {
- rfbLog("rfbSetTranslateFunction: server has colour map "
- "but %d-bit - can only cope with 8-bit colour maps\n",
- rfbServerFormat.bitsPerPixel);
- rfbCloseSock(cl->sock);
- return FALSE;
- }
-
- if (!cl->format.trueColour && (cl->format.bitsPerPixel != 8)) {
- rfbLog("rfbSetTranslateFunction: client has colour map "
- "but %d-bit - can only cope with 8-bit colour maps\n",
- cl->format.bitsPerPixel);
- rfbCloseSock(cl->sock);
- return FALSE;
- }
-
- /*
- * bpp is valid, now work out how to translate
- */
-
- if (!cl->format.trueColour) {
-
- /* ? -> colour map */
-
- if (!rfbServerFormat.trueColour) {
-
- /* colour map -> colour map */
-
- rfbLog("rfbSetTranslateFunction: both 8-bit colour map: "
- "no translation needed\n");
- cl->translateFn = rfbTranslateNone;
- return rfbSetClientColourMap(cl, 0, 0);
- }
-
- /*
- * truecolour -> colour map
- *
- * Set client's colour map to BGR233, then effectively it's
- * truecolour as well
- */
-
- if (!rfbSetClientColourMapBGR233(cl))
- return FALSE;
-
- cl->format = BGR233Format;
- }
-
- /* ? -> truecolour */
-
- if (!rfbServerFormat.trueColour) {
-
- /* colour map -> truecolour */
-
- rfbLog("rfbSetTranslateFunction: client is %d-bit trueColour,"
- " server has colour map\n",cl->format.bitsPerPixel);
-
- cl->translateFn = rfbTranslateWithSingleTableFns
- [rfbServerFormat.bitsPerPixel / 16]
- [cl->format.bitsPerPixel / 16];
-
- return rfbSetClientColourMap(cl, 0, 0);
- }
-
- /* truecolour -> truecolour */
-
- if (PF_EQ(cl->format,rfbServerFormat)) {
-
- /* client & server the same */
-
- rfbLog("no translation needed\n");
- cl->translateFn = rfbTranslateNone;
- return TRUE;
- }
-
- if ((rfbServerFormat.bitsPerPixel < 16) ||
- (!rfbEconomicTranslate && (rfbServerFormat.bitsPerPixel == 16))) {
-
- /* we can use a single lookup table for <= 16 bpp */
-
- cl->translateFn = rfbTranslateWithSingleTableFns
- [rfbServerFormat.bitsPerPixel / 16]
- [cl->format.bitsPerPixel / 16];
-
- (*rfbInitTrueColourSingleTableFns
- [cl->format.bitsPerPixel / 16]) (&cl->translateLookupTable,
- &rfbServerFormat, &cl->format);
-
- } else {
-
- /* otherwise we use three separate tables for red, green and blue */
-
- cl->translateFn = rfbTranslateWithRGBTablesFns
- [rfbServerFormat.bitsPerPixel / 16]
- [cl->format.bitsPerPixel / 16];
-
- (*rfbInitTrueColourRGBTablesFns
- [cl->format.bitsPerPixel / 16]) (&cl->translateLookupTable,
- &rfbServerFormat, &cl->format);
- }
-
- return TRUE;
-}
-
-
-
-/*
- * rfbSetClientColourMapBGR233 sets the client's colour map so that it's
- * just like an 8-bit BGR233 true colour client.
- */
-
-static Bool
-rfbSetClientColourMapBGR233(cl)
- rfbClientPtr cl;
-{
- char buf[sz_rfbSetColourMapEntriesMsg + 256 * 3 * 2];
- rfbSetColourMapEntriesMsg *scme = (rfbSetColourMapEntriesMsg *)buf;
- CARD16 *rgb = (CARD16 *)(&buf[sz_rfbSetColourMapEntriesMsg]);
- int i, len;
- int r, g, b;
-
- if (cl->format.bitsPerPixel != 8) {
- rfbLog("%s: client not 8 bits per pixel\n",
- "rfbSetClientColourMapBGR233");
- rfbCloseSock(cl->sock);
- return FALSE;
- }
-
- scme->type = rfbSetColourMapEntries;
-
- scme->firstColour = Swap16IfLE(0);
- scme->nColours = Swap16IfLE(256);
-
- len = sz_rfbSetColourMapEntriesMsg;
-
- i = 0;
-
- for (b = 0; b < 4; b++) {
- for (g = 0; g < 8; g++) {
- for (r = 0; r < 8; r++) {
- rgb[i++] = Swap16IfLE(r * 65535 / 7);
- rgb[i++] = Swap16IfLE(g * 65535 / 7);
- rgb[i++] = Swap16IfLE(b * 65535 / 3);
- }
- }
- }
-
- len += 256 * 3 * 2;
-
- if (WriteExact(cl->sock, buf, len) < 0) {
- rfbLogPerror("rfbSetClientColourMapBGR233: write");
- rfbCloseSock(cl->sock);
- return FALSE;
- }
- return TRUE;
-}
-
-
-/*
- * rfbSetClientColourMap is called to set the client's colour map. If the
- * client is a true colour client, we simply update our own translation table
- * and mark the whole screen as having been modified.
- */
-
-Bool
-rfbSetClientColourMap(cl, firstColour, nColours)
- rfbClientPtr cl;
- int firstColour;
- int nColours;
-{
- BoxRec box;
-
- if (nColours == 0) {
- nColours = rfbInstalledColormap->pVisual->ColormapEntries;
- }
-
- if (rfbServerFormat.trueColour || !cl->readyForSetColourMapEntries) {
- return TRUE;
- }
-
- if (cl->format.trueColour) {
- (*rfbInitColourMapSingleTableFns
- [cl->format.bitsPerPixel / 16]) (&cl->translateLookupTable,
- &rfbServerFormat, &cl->format);
-
- REGION_UNINIT(pScreen,&cl->modifiedRegion);
- box.x1 = box.y1 = 0;
- box.x2 = rfbScreen.width;
- box.y2 = rfbScreen.height;
- REGION_INIT(pScreen,&cl->modifiedRegion,&box,0);
-
- return TRUE;
- }
-
- return rfbSendSetColourMapEntries(cl, firstColour, nColours);
-}
-
-
-/*
- * rfbSetClientColourMaps sets the colour map for each RFB client.
- */
-
-void
-rfbSetClientColourMaps(firstColour, nColours)
- int firstColour;
- int nColours;
-{
- rfbClientPtr cl, nextCl;
-
- for (cl = rfbClientHead; cl; cl = nextCl) {
- nextCl = cl->next;
- rfbSetClientColourMap(cl, firstColour, nColours);
- }
-}
-
-
-static void
-PrintPixelFormat(pf)
- rfbPixelFormat *pf;
-{
- if (pf->bitsPerPixel == 1) {
- rfbLog(" 1 bpp, %s sig bit in each byte is leftmost on the screen.\n",
- (pf->bigEndian ? "most" : "least"));
- } else {
- rfbLog(" %d bpp, depth %d%s\n",pf->bitsPerPixel,pf->depth,
- ((pf->bitsPerPixel == 8) ? ""
- : (pf->bigEndian ? ", big endian" : ", little endian")));
- if (pf->trueColour) {
- rfbLog(" true colour: max r %d g %d b %d, shift r %d g %d b %d\n",
- pf->redMax, pf->greenMax, pf->blueMax,
- pf->redShift, pf->greenShift, pf->blueShift);
- } else {
- rfbLog(" uses a colour map (not true colour).\n");
- }
- }
-}
projects / rdpsrv / blobdiff