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3032 lines
98 KiB
3032 lines
98 KiB
#include "precomp.h"
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//
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// FH.CPP
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// Font Handling
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//
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// Copyright(c) Microsoft 1997-
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//
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#define MLZ_FILE_ZONE ZONE_CORE
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//
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// Table of problem fonts
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//
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const TCHAR c_szIBMHex[] = "r_ibmhex";
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const LPCTSTR c_aszProblemFonts[] =
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{
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c_szIBMHex,
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};
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#define CFONTS_PROBLEM (sizeof(c_aszProblemFonts) / sizeof(c_aszProblemFonts[0]))
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//
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// FH_Init()
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//
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// This routine allocates a structure for the local font list, then fills
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// it in. It returns the number of local fonts in the list, or zero if
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// something went wrong
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//
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UINT FH_Init(void)
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{
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UINT cFonts = 0;
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DebugEntry(FH_Init);
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//
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// Create the font array and the font index array
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//
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g_fhFonts = new FHLOCALFONTS;
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if (!g_fhFonts)
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{
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ERROR_OUT(("FH_Init: couldn't allocate g_fhFonts local list"));
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DC_QUIT;
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}
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ZeroMemory(g_fhFonts, sizeof(FHLOCALFONTS));
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SET_STAMP(g_fhFonts, FHLOCALFONTS);
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//
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// Now we consider the fonts individually, and store all acceptable
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// ones in the local font list.
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//
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FHConsiderAllLocalFonts();
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cFonts = g_fhFonts->fhNumFonts;
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if (cFonts)
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{
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FHSortAndIndexLocalFonts();
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}
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else
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{
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WARNING_OUT(( "No fonts found - this seems unlikely"));
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}
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DC_EXIT_POINT:
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DebugExitDWORD(FH_Init, cFonts);
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return(cFonts);
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}
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//
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// FH_Term()
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//
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void FH_Term(void)
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{
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DebugEntry(FH_Term);
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if (g_fhFonts)
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{
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delete g_fhFonts;
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g_fhFonts = NULL;
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}
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DebugExitVOID(FH_Term);
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}
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//
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// FH_ReceivedPacket - see fh.h
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//
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void ASShare::FH_ReceivedPacket
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(
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ASPerson * pasPerson,
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PS20DATAPACKET pPacket
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)
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{
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PFHPACKET pFontsPacket;
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UINT iLocal;
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UINT iRemote;
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LPNETWORKFONT pRemoteFont;
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POEREMOTEFONT pLocalFont;
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UINT cbSize;
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DebugEntry(ASShare::FH_ReceivedPacket);
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ValidatePerson(pasPerson);
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pFontsPacket = (PFHPACKET)pPacket;
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//
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// If the number we received isn't the same as before, we need to
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// possibly free the previous font block, and then allocate a new one.
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//
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// Once we're in a share with this person, every new joiner will cause
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// existing members to resend their local fonts, usually the same size.
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// So we can optimize and not realloc in that case.
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//
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if (pFontsPacket->cFonts != pasPerson->oecFonts)
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{
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if (pasPerson->poeFontInfo)
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{
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delete[] pasPerson->poeFontInfo;
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pasPerson->poeFontInfo = NULL;
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pasPerson->oecFonts = 0;
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}
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else
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{
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ASSERT(!pasPerson->oecFonts);
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}
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//
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// Allocate a new block
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//
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pasPerson->poeFontInfo = new OEREMOTEFONT[pFontsPacket->cFonts];
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if (!pasPerson->poeFontInfo)
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{
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ERROR_OUT(("Couldn't allocate %d fonts for FH packet from [%d]",
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pasPerson->mcsID));
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DC_QUIT;
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}
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ZeroMemory(pasPerson->poeFontInfo, pFontsPacket->cFonts * sizeof(OEREMOTEFONT));
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pasPerson->oecFonts = pFontsPacket->cFonts;
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}
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TRACE_OUT(("Received %d remote fonts in packet from person [%d]",
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pasPerson->oecFonts, pasPerson->mcsID));
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//
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// Consider each remote font. The multibyte fields of the NETWORKFONT
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// structure are flipped as they are read; otherwise we would have to
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// duplicate the logic about which fields are present in which version.
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//
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//
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// The size of each font is in the packet.
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//
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cbSize = pFontsPacket->cbFontSize;
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pRemoteFont = pFontsPacket->aFonts;
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pLocalFont = pasPerson->poeFontInfo;
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for (iRemote = 0; iRemote < pasPerson->oecFonts; iRemote++, pLocalFont++)
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{
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//
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// Copy the fields we store directly.
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//
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pLocalFont->rfFontFlags = pRemoteFont->nfFontFlags;
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pLocalFont->rfAveWidth = pRemoteFont->nfAveWidth;
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pLocalFont->rfAveHeight = pRemoteFont->nfAveHeight;
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pLocalFont->rfAspectX = pRemoteFont->nfAspectX;
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pLocalFont->rfAspectY = pRemoteFont->nfAspectY;
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//
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// And the R2.0 field(s)...
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//
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if (m_oeCombinedOrderCaps.capsfFonts & CAPS_FONT_CODEPAGE)
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{
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pLocalFont->rfCodePage = pRemoteFont->nfCodePage;
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}
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//
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// And the other R2.0 field(s)...
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//
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if (m_oeCombinedOrderCaps.capsfFonts & CAPS_FONT_R20_SIGNATURE)
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{
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pLocalFont->rfSigFats = pRemoteFont->nfSigFats;
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pLocalFont->rfSigThins = pRemoteFont->nfSigThins;
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pLocalFont->rfSigSymbol = pRemoteFont->nfSigSymbol;
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}
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if (m_oeCombinedOrderCaps.capsfFonts & CAPS_FONT_EM_HEIGHT)
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{
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pLocalFont->rfMaxAscent = pRemoteFont->nfMaxAscent;
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TRACE_OUT(( "maxAscent %hd", pLocalFont->rfMaxAscent));
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}
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//
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// Set up an initial remote to local handle mapping, by scanning
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// for the first local font with the remote font's facename.
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//
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// We first set a default match value, in case we dont find a true
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// match - this value should never be referenced since we never get
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// sent fonts that we can't match (because we sent details of our
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// fonts to remote systems, and they should be using the same, or a
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// compatible, font matching algorithm.
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//
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// The mapping we obtain here is to the first local font that has
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// the remote font's facename, which is probably not the correct
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// font (ie there are probably multiple fonts with the same
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// facename). This initial mapping will be updated when we do the
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// full matching for all remote fonts. (See FHConsiderRemoteFonts
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// for details), but is sufficient, as all we will use it for until
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// then, is to obtain the facename.
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//
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// This approach means that we do not have to store the remote
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// facename, which is a useful saving on remote font details space.
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//
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// SFR5279: cannot default to zero because that means we give a
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// name to fonts that do not in fact match at all, causing us to
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// always waste effort in FHConsiderRemoteFonts and sometimes to
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// wrongly match two fonts that do not really match at all.
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//
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pLocalFont->rfLocalHandle= NO_FONT_MATCH;
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for (iLocal = 0; iLocal < g_fhFonts->fhNumFonts; iLocal++)
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{
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if (!lstrcmp(g_fhFonts->afhFonts[iLocal].Details.nfFaceName,
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pRemoteFont->nfFaceName))
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{
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pLocalFont->rfLocalHandle = (TSHR_UINT16)iLocal;
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break;
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}
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}
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//
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// Advance to the next remote font.
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//
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pRemoteFont = (LPNETWORKFONT)((LPBYTE)pRemoteFont + cbSize);
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}
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DC_EXIT_POINT:
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//
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// We have a new set of fonts, so determine the common list.
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//
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FH_DetermineFontSupport();
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DebugExitVOID(ASShare::FH_ReceivedPacket);
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}
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//
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// FH_SendLocalFontInfo()
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//
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void ASShare::FH_SendLocalFontInfo(void)
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{
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PFHPACKET pFontPacket = NULL;
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LPBYTE pNetworkFonts;
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UINT pktSize;
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UINT iFont;
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BOOL fSendFont;
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UINT cDummyFonts = 0;
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#ifdef _DEBUG
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UINT sentSize;
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#endif // _DEBUG
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DebugEntry(ASShare::FH_SendLocalFontInfo);
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ASSERT(!m_fhLocalInfoSent);
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//
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//
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// Look at the combined capability flags to see whether the remote(s)
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// can cope with our preferred font structure (R20) or a slightly
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// older one (R11) or only the original flavor (pre R11).
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//
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//
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if (!(m_oeCombinedOrderCaps.capsfFonts & CAPS_FONT_R20_TEST_FLAGS))
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{
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WARNING_OUT(("Remotes in share don't support CAPS_FONT_R20"));
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m_fhLocalInfoSent = TRUE;
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DC_QUIT;
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}
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pktSize = sizeof(FHPACKET) + (g_fhFonts->fhNumFonts - 1) * sizeof(NETWORKFONT);
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pFontPacket = (PFHPACKET)SC_AllocPkt(PROT_STR_MISC, g_s20BroadcastID, pktSize);
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if (!pFontPacket)
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{
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WARNING_OUT(("Failed to alloc FH packet, size %u", pktSize));
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DC_QUIT;
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}
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//
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// Packet successfully allocated. Fill in the data and send it.
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//
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pFontPacket->header.data.dataType = DT_FH;
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pFontPacket->cbFontSize = sizeof(NETWORKFONT);
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//
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// Copy the fonts we want to send into the network packet.
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//
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pNetworkFonts = (LPBYTE)pFontPacket->aFonts;
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cDummyFonts = 0;
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for (iFont = 0 ; iFont < g_fhFonts->fhNumFonts ; iFont++)
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{
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//
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// Assume we will send this font.
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//
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fSendFont = TRUE;
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//
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// Check whether font is ANSI charset or font CodePage capability
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// is supported. If neither, skip on to next local font.
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//
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TRACE_OUT(( "TEST CP set OK: font[%u] CodePage[%hu]", iFont,
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g_fhFonts->afhFonts[iFont].Details.nfCodePage));
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if ((g_fhFonts->afhFonts[iFont].Details.nfCodePage != ANSI_CHARSET) &&
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(!(m_oeCombinedOrderCaps.capsfFonts & CAPS_FONT_CODEPAGE)) )
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{
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TRACE_OUT(( "Dont send font[%u] CodePage[%hu]", iFont,
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g_fhFonts->afhFonts[iFont].Details.nfCodePage));
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fSendFont = FALSE;
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}
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if (fSendFont)
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{
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//
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// We want to send this entry so copy across as much of the
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// stored details as the protocol level requires.
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// We then mask the flags and advance to the next location in
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// the packet.
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//
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memcpy(pNetworkFonts,
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&g_fhFonts->afhFonts[iFont].Details,
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sizeof(NETWORKFONT));
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((LPNETWORKFONT)pNetworkFonts)->nfFontFlags &= ~NF_LOCAL;
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}
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else
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{
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//
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// If we determine that we do not want to send the current
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// font then we fill the corresponding entry in the network
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// packet with zeros. This ensures that an index into our
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// local font table is also an index into the network packet,
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// so no conversion is required. Setting the whole entry to
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// zero gives the font a NULL facename and zero size, which
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// will never match a real font.
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//
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ZeroMemory(pNetworkFonts, sizeof(NETWORKFONT));
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cDummyFonts++;
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}
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//
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// Move to the next entry in the font packet.
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//
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pNetworkFonts += sizeof(NETWORKFONT);
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}
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//
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// Note that at the end of this loop, we may not have sent any fonts,
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// eg where the remote system does not support the font CodePage
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// capability and we do not have any true ANSI fonts. We send the
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// packet anyway, so the remote system sees that we have no fonts to
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// match.
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//
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//
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// Only now do we know the number of fonts we actually put in the
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// packet.
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//
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pFontPacket->cFonts = (TSHR_UINT16)g_fhFonts->fhNumFonts;
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//
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// Send the fonts packet on the MISC stream. It has no dependency on
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// any updates and we want it to get across quickly.
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//
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if (m_scfViewSelf)
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FH_ReceivedPacket(m_pasLocal, &(pFontPacket->header));
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#ifdef _DEBUG
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sentSize =
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#endif // _DEBUG
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DCS_CompressAndSendPacket(PROT_STR_MISC, g_s20BroadcastID,
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&(pFontPacket->header), pktSize);
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TRACE_OUT(("FH packet size: %08d, sent %08d", pktSize, sentSize));
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TRACE_OUT(( "Sent font packet with %u fonts (inc %u dummies)",
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g_fhFonts->fhNumFonts,
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cDummyFonts));
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//
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// Set the flag that indicates that we have successfully sent the
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// font info.
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//
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m_fhLocalInfoSent = TRUE;
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//
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// The font info has been sent, so this may mean we can enable text
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// orders.
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//
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FHMaybeEnableText();
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DC_EXIT_POINT:
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DebugExitVOID(ASShare::FH_SendLocalFontInfo);
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}
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//
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// FUNCTION: FH_GetMaxHeightFromLocalHandle
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//
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// DESCRIPTION:
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//
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// Given an FH font handle (ie a handle originating from the locally
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// supported font structure which was sent to the remote machine at the
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// start of the call) this function returns the MaxBaseLineExt value stored
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// with the LOCALFONT details
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//
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// PARAMETERS:
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//
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// fontHandle - font handle being queried.
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//
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// RETURNS: max font height
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//
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//
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UINT FH_GetMaxHeightFromLocalHandle(UINT fontHandle)
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{
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UINT rc;
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DebugEntry(FH_GetMaxHeightFromLocalHandle);
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//
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// First check that the font handle is valid.
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//
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if (fontHandle >= g_fhFonts->fhNumFonts)
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{
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ERROR_OUT(( "Invalid font handle %u", fontHandle));
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fontHandle = 0;
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}
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//
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// Return the max font height
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//
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rc = g_fhFonts->afhFonts[fontHandle].lMaxBaselineExt;
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DebugExitDWORD(FH_GetMaxHeightFromLocalHandle, rc);
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return(rc);
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}
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//
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// FUNCTION: FH_GetFontFlagsFromLocalHandle
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//
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// DESCRIPTION:
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//
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// Given an FH font handle (ie a handle originating from the locally
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// supported font structure which was sent to the remote machine at the
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// start of the call) this function returns the FontFlags value stored with
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// the LOCALFONT details
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//
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// PARAMETERS:
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//
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// fontHandle - font handle being queried.
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//
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// RETURNS: font flags
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//
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//
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UINT FH_GetFontFlagsFromLocalHandle(UINT fontHandle)
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{
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UINT rc;
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DebugEntry(FH_GetFontFlagsFromLocalHandle);
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//
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// First check that the font handle is valid.
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//
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if (fontHandle >= g_fhFonts->fhNumFonts)
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{
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ERROR_OUT(( "Invalid font handle %u", fontHandle));
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fontHandle = 0;
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}
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//
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// Return the font flags.
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//
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rc = g_fhFonts->afhFonts[fontHandle].Details.nfFontFlags;
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DebugExitDWORD(FH_GetFontFlagsFromLocalHandle, rc);
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return(rc);
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}
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|
|
//
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// FUNCTION: FH_GetCodePageFromLocalHandle
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//
|
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// DESCRIPTION:
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//
|
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// Given an FH font handle (ie a handle originating from the locally
|
|
// supported font structure which was sent to the remote machine at the
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// start of the call) this function returns the CodePage value stored with
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// the LOCALFONT details
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//
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// PARAMETERS:
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//
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// fontHandle - font handle being queried.
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//
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// RETURNS: char set
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//
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//
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UINT FH_GetCodePageFromLocalHandle(UINT fontHandle)
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{
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UINT rc = 0;
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DebugEntry(FH_GetCodePageFromLocalHandle);
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|
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//
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// First check that the font handle is valid.
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//
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if (fontHandle >= g_fhFonts->fhNumFonts)
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{
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ERROR_OUT(( "Invalid font handle %u", fontHandle));
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fontHandle = 0;
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}
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//
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// Return the char set.
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//
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rc = g_fhFonts->afhFonts[fontHandle].Details.nfCodePage;
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DebugExitDWORD(FH_GetCodePageFromLocalHandle, rc);
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return(rc);
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}
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|
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//
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// FH_ConvertAnyFontIDToLocal()
|
|
//
|
|
// DESCRIPTION:
|
|
// Converts any font name ID fields in the passed order from remote font
|
|
// face name IDs to local font facename IDs.
|
|
//
|
|
void ASShare::FH_ConvertAnyFontIDToLocal
|
|
(
|
|
LPCOM_ORDER pOrder,
|
|
ASPerson * pasPerson
|
|
)
|
|
{
|
|
LPCOMMON_TEXTORDER pCommon = NULL;
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|
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DebugEntry(ASShare::FH_ConvertAnyFontIDToLocal);
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|
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ValidatePerson(pasPerson);
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|
|
//
|
|
// Get a pointer to the structure which is common to both TextOut and
|
|
// ExtTextOut
|
|
//
|
|
if (TEXTFIELD(pOrder)->type == LOWORD(ORD_TEXTOUT))
|
|
{
|
|
pCommon = &TEXTFIELD(pOrder)->common;
|
|
}
|
|
else if (EXTTEXTFIELD(pOrder)->type == LOWORD(ORD_EXTTEXTOUT))
|
|
{
|
|
pCommon = &EXTTEXTFIELD(pOrder)->common;
|
|
}
|
|
else
|
|
{
|
|
ERROR_OUT(( "Order type not TextOut or ExtTextOut."));
|
|
DC_QUIT;
|
|
}
|
|
|
|
TRACE_OUT(( "fonthandle IN %lu", pCommon->FontIndex));
|
|
pCommon->FontIndex = FHGetLocalFontHandle(pCommon->FontIndex, pasPerson);
|
|
TRACE_OUT(( "fonthandle OUT %lu", pCommon->FontIndex));
|
|
|
|
DC_EXIT_POINT:
|
|
DebugExitVOID(ASShare::FH_ConvertAnyFontIDToLocal);
|
|
}
|
|
|
|
//
|
|
// FH_GetFaceNameFromLocalHandle - see fh.h
|
|
//
|
|
LPSTR FH_GetFaceNameFromLocalHandle(UINT fontHandle, LPUINT pFaceNameLength)
|
|
{
|
|
LPSTR pFontName = NULL;
|
|
|
|
DebugEntry(FH_GetFaceNameFromLocalHandle);
|
|
|
|
//
|
|
// First check that the font handle is valid.
|
|
//
|
|
if (fontHandle >= g_fhFonts->fhNumFonts)
|
|
{
|
|
ERROR_OUT(( "Invalid font handle %u", fontHandle));
|
|
fontHandle = 0;
|
|
}
|
|
|
|
//
|
|
// Now get the facename
|
|
//
|
|
*pFaceNameLength = lstrlen(g_fhFonts->afhFonts[fontHandle].RealName);
|
|
pFontName = g_fhFonts->afhFonts[fontHandle].RealName;
|
|
|
|
DebugExitVOID(FH_GetFaceNameFromLocalHandle);
|
|
return(pFontName);
|
|
}
|
|
|
|
|
|
//
|
|
// FH_DetermineFontSupport()
|
|
//
|
|
void ASShare::FH_DetermineFontSupport(void)
|
|
{
|
|
UINT cCommonFonts;
|
|
UINT iLocal;
|
|
ASPerson * pasPerson;
|
|
|
|
DebugEntry(ASShare::FH_DetermineFontSupport);
|
|
|
|
//
|
|
// First mark all local fonts as supported.
|
|
//
|
|
cCommonFonts = g_fhFonts->fhNumFonts;
|
|
for (iLocal = 0; iLocal < g_fhFonts->fhNumFonts; iLocal++)
|
|
{
|
|
g_fhFonts->afhFonts[iLocal].SupportCode = FH_SC_EXACT_MATCH;
|
|
}
|
|
|
|
//
|
|
// Work through all remote people (but not us)
|
|
//
|
|
ValidatePerson(m_pasLocal);
|
|
|
|
for (pasPerson = m_pasLocal->pasNext;
|
|
(cCommonFonts > 0) && (pasPerson != NULL);
|
|
pasPerson = pasPerson->pasNext)
|
|
{
|
|
ValidatePerson(pasPerson);
|
|
|
|
if (pasPerson->oecFonts)
|
|
{
|
|
cCommonFonts = FHConsiderRemoteFonts(cCommonFonts, pasPerson);
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// We do not have valid fonts for this person, so must not
|
|
// send any text orders at all.
|
|
//
|
|
TRACE_OUT(( "Pending FONT INFO from person [%d]", pasPerson->mcsID));
|
|
cCommonFonts = 0;
|
|
}
|
|
}
|
|
|
|
//
|
|
// We have determined the common supported fonts, and may be able to
|
|
// enable text orders now.
|
|
//
|
|
FHMaybeEnableText();
|
|
|
|
DebugExitVOID(ASShare::FH_DetermineFontSupport);
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// FH_CreateAndSelectFont()
|
|
//
|
|
BOOL FH_CreateAndSelectFont(HDC surface,
|
|
HFONT* pHNewFont,
|
|
HFONT* pHOldFont,
|
|
LPSTR fontName,
|
|
UINT codepage,
|
|
UINT fontMaxHeight,
|
|
UINT fontHeight,
|
|
UINT fontWidth,
|
|
UINT fontWeight,
|
|
UINT fontFlags)
|
|
{
|
|
BOOL rc;
|
|
BYTE italic;
|
|
BYTE underline;
|
|
BYTE strikeout;
|
|
BYTE pitch;
|
|
BYTE charset;
|
|
BYTE precis;
|
|
|
|
DebugEntry(FH_CreateAndSelectFont);
|
|
|
|
|
|
//
|
|
// Set the return code to indicate failure (FALSE). We will change this
|
|
// later if we successfully create the font.
|
|
//
|
|
rc = FALSE;
|
|
|
|
//
|
|
// Massage the data passed which describes the font into the correct
|
|
// arrangement to pass on a create font call. Then create a font.
|
|
//
|
|
|
|
//
|
|
// If a facename passed is the null string then we are supposed to use
|
|
// the system font.
|
|
//
|
|
if (fontName[0] == 0)
|
|
{
|
|
WARNING_OUT(( "Using system font"));
|
|
*pHNewFont = GetStockFont(SYSTEM_FONT);
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Determine the italic, underline, strikeout and pitch values from
|
|
// the packed flags.
|
|
//
|
|
italic = (BYTE)(fontFlags & NF_ITALIC);
|
|
underline = (BYTE)(fontFlags & NF_UNDERLINE);
|
|
strikeout = (BYTE)(fontFlags & NF_STRIKEOUT);
|
|
|
|
if (fontFlags & NF_FIXED_PITCH)
|
|
{
|
|
pitch = FF_DONTCARE | FIXED_PITCH;
|
|
}
|
|
else
|
|
{
|
|
pitch = FF_DONTCARE | VARIABLE_PITCH;
|
|
}
|
|
|
|
//
|
|
// Check whether this is a TrueType font. This is important, as
|
|
// the Windows Font mapper is biased towards non-TrueType, and it
|
|
// is easy to do the subsequent decoding with a non-TrueType font.
|
|
//
|
|
// Note that the Windows headers do not define a name for the
|
|
// required value (which is 0x04 in the manuals), so we use the
|
|
// value used in the TextMetrics (which has the same value).
|
|
//
|
|
if (fontFlags & NF_TRUE_TYPE)
|
|
{
|
|
pitch |= TMPF_TRUETYPE;
|
|
precis = OUT_TT_ONLY_PRECIS;
|
|
}
|
|
else
|
|
{
|
|
precis = OUT_RASTER_PRECIS;
|
|
}
|
|
|
|
//
|
|
// The height we are passed is the character height, not the cell
|
|
// height. To indicate this to Windows we need to pass it in as a
|
|
// negative value.
|
|
//
|
|
TRACE_OUT(( "CreateFont cx(%u) cy(%u) wt(%u) pitch(%u) name:%s",
|
|
fontWidth,
|
|
fontHeight,
|
|
fontWeight,
|
|
pitch,
|
|
fontName ));
|
|
|
|
//
|
|
// Use the misleadingly named codepage value to calculate what
|
|
// charset to ask Windows for.
|
|
//
|
|
if (codepage == NF_CP_WIN_ANSI)
|
|
{
|
|
charset = ANSI_CHARSET;
|
|
}
|
|
else if (codepage == NF_CP_WIN_OEM)
|
|
{
|
|
charset = OEM_CHARSET;
|
|
}
|
|
else if (codepage == NF_CP_WIN_SYMBOL)
|
|
{
|
|
charset = SYMBOL_CHARSET;
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// We have to trust our luck to Windows by specifying default
|
|
// (meaning don't care).
|
|
//
|
|
charset = DEFAULT_CHARSET;
|
|
}
|
|
|
|
*pHNewFont = CreateFont(-(int)fontHeight,
|
|
fontWidth,
|
|
0, // escapement
|
|
0, // orientation
|
|
fontWeight,
|
|
italic,
|
|
underline,
|
|
strikeout,
|
|
charset,
|
|
precis,
|
|
CLIP_DEFAULT_PRECIS,
|
|
DEFAULT_QUALITY,
|
|
pitch,
|
|
fontName);
|
|
if (*pHNewFont == NULL)
|
|
{
|
|
WARNING_OUT(( "Failed to create font %s", fontName));
|
|
DC_QUIT;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Now we have created the font we need to select it into the HDC
|
|
// which was passed to us.
|
|
//
|
|
*pHOldFont = SelectFont(surface, *pHNewFont);
|
|
if (*pHOldFont == NULL)
|
|
{
|
|
ERROR_OUT(( "Failed to select font %s", fontName));
|
|
DeleteFont(*pHNewFont);
|
|
*pHNewFont = NULL;
|
|
DC_QUIT;
|
|
}
|
|
TRACE_OUT(( "Select new font: %p Old font: %", *pHNewFont,
|
|
*pHOldFont));
|
|
|
|
//
|
|
// We have successfully created and selected the font.
|
|
//
|
|
rc = TRUE;
|
|
|
|
DC_EXIT_POINT:
|
|
DebugExitDWORD(FH_CreateAndSelectFont, rc);
|
|
return(rc);
|
|
}
|
|
|
|
|
|
//
|
|
// FHAddFontToLocalTable
|
|
//
|
|
// Adds the given font into the local font table, along with any renaming
|
|
// and approximate matches.
|
|
//
|
|
//
|
|
void FHAddFontToLocalTable( LPSTR faceName,
|
|
TSHR_UINT16 fontFlags,
|
|
TSHR_UINT16 codePage,
|
|
TSHR_UINT16 maxHeight,
|
|
TSHR_UINT16 aveHeight,
|
|
TSHR_UINT16 aveWidth,
|
|
TSHR_UINT16 aspectX,
|
|
TSHR_UINT16 aspectY,
|
|
TSHR_UINT16 maxAscent)
|
|
{
|
|
TSHR_INT16 fatSig;
|
|
TSHR_INT16 thinSig;
|
|
TSHR_INT16 symbolSig;
|
|
FHWIDTHTABLE wTable;
|
|
TSHR_UINT16 height;
|
|
TSHR_UINT16 width;
|
|
TSHR_UINT16 weight;
|
|
LOCALFONT thisFont;
|
|
TSHR_UINT16 fIndex;
|
|
|
|
//
|
|
// SFRFONT: place marker.
|
|
// Here would be the best place to adjust codepage; for example suppose
|
|
// we find that CodePage 950 (Chinese) is so different on all platforms
|
|
// that we just should not send text orders in this codepage, we can
|
|
// set codePage=NF_CP_UNKNOWN and it will be discarded.
|
|
//
|
|
|
|
//
|
|
// SFRFONT: no point hanging on to details of fonts with unknown
|
|
// code pages; we cannot risk matching them.
|
|
//
|
|
if (codePage == NF_CP_UNKNOWN)
|
|
{
|
|
TRACE_OUT(( "unknown CP: discard"));
|
|
DC_QUIT;
|
|
}
|
|
|
|
//
|
|
// Check we still have room for more fonts.
|
|
//
|
|
if (g_fhFonts->fhNumFonts >= FH_MAX_FONTS)
|
|
{
|
|
//
|
|
// We are already at our maximum number of fonts.
|
|
//
|
|
DC_QUIT;
|
|
}
|
|
|
|
//
|
|
// Zero the fields where we store facenames to allow bytewise matches.
|
|
//
|
|
ZeroMemory(thisFont.Details.nfFaceName, FH_FACESIZE);
|
|
ZeroMemory(thisFont.RealName, FH_FACESIZE);
|
|
|
|
//
|
|
// Store the easy bits!
|
|
//
|
|
thisFont.Details.nfFontFlags = fontFlags;
|
|
thisFont.Details.nfAveWidth = aveWidth;
|
|
thisFont.Details.nfAveHeight = aveHeight;
|
|
thisFont.Details.nfAspectX = aspectX;
|
|
thisFont.Details.nfAspectY = aspectY;
|
|
thisFont.Details.nfCodePage = codePage;
|
|
|
|
thisFont.lMaxBaselineExt = maxHeight;
|
|
|
|
//
|
|
// Store the real name, for use when we want to create an instance of
|
|
// this font.
|
|
//
|
|
lstrcpy (thisFont.RealName, faceName);
|
|
|
|
//
|
|
// Fill in the wire-format facename.
|
|
//
|
|
// NB - This has a machine-specific prefix, but for NT the prefix is an
|
|
// empty string, so we can just use a strcpy without worrying about the
|
|
// issues of adding a prefix.
|
|
//
|
|
lstrcpy (thisFont.Details.nfFaceName, faceName);
|
|
|
|
//
|
|
// Make sure the signatures are zero for now.
|
|
//
|
|
thisFont.Details.nfSigFats = 0;
|
|
thisFont.Details.nfSigThins = 0;
|
|
thisFont.Details.nfSigSymbol = 0;
|
|
|
|
//
|
|
// Now calculate the signature and maxAscent for this font
|
|
//
|
|
weight = 0; // use default weight
|
|
|
|
if ((fontFlags & NF_FIXED_SIZE) != 0)
|
|
{
|
|
//
|
|
// Fixed size font: use actual font size for signatures/maxAscent
|
|
//
|
|
height = thisFont.lMaxBaselineExt;
|
|
width = thisFont.Details.nfAveWidth;
|
|
|
|
thisFont.Details.nfMaxAscent = maxAscent;
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Scalable font: use default height/width for signatures/maxAscent
|
|
//
|
|
height = NF_METRICS_HEIGHT;
|
|
width = NF_METRICS_WIDTH;
|
|
|
|
thisFont.Details.nfMaxAscent = NF_METRICS_HEIGHT;
|
|
}
|
|
|
|
//
|
|
// Initialise signature fields to zero (== NF_NO_SIGNATURE). They will
|
|
// be overwritten assuming we get a font width table OK.
|
|
//
|
|
fatSig = 0;
|
|
thinSig = 0;
|
|
symbolSig = 0;
|
|
|
|
//
|
|
// FHGenerateFontWidthTable also gives us a proper maxAscent value for
|
|
// scalable fonts (i.e. based on its own rendition of the font)
|
|
//
|
|
if (FHGenerateFontWidthTable(&wTable,
|
|
&thisFont,
|
|
height,
|
|
width,
|
|
weight,
|
|
thisFont.Details.nfFontFlags,
|
|
&maxAscent))
|
|
{
|
|
//
|
|
// If this is a scalable font, use the updated maxAscent value that
|
|
// FHGenerateFontWidthTable has given us.
|
|
//
|
|
if (0 == (thisFont.Details.nfFontFlags & NF_FIXED_SIZE))
|
|
{
|
|
thisFont.Details.nfMaxAscent = maxAscent;
|
|
TRACE_OUT(( "Set maxAscent = %d", thisFont.Details.nfMaxAscent));
|
|
}
|
|
|
|
//
|
|
// We have all the raw data we need. Calculate the signatures.
|
|
//
|
|
FHCalculateSignatures(&wTable, &fatSig, &thinSig, &symbolSig);
|
|
}
|
|
|
|
//
|
|
// Store the signatures. If the call to FHGenerateFontWidthTable
|
|
// fails, the signatures are zero.
|
|
//
|
|
thisFont.Details.nfSigFats = (BYTE)fatSig;
|
|
thisFont.Details.nfSigThins = (BYTE)thinSig;
|
|
thisFont.Details.nfSigSymbol = (TSHR_UINT16)symbolSig;
|
|
|
|
TRACE_OUT(( "Font %hu signatures: (x%.4hx%.2hx%.2hx)",
|
|
g_fhFonts->fhNumFonts,
|
|
thisFont.Details.nfSigSymbol,
|
|
(TSHR_UINT16)(thisFont.Details.nfSigThins),
|
|
(TSHR_UINT16)(thisFont.Details.nfSigFats)));
|
|
|
|
//
|
|
// We can now copy the details to the end of the local table.
|
|
//
|
|
memcpy((void *)&g_fhFonts->afhFonts[g_fhFonts->fhNumFonts],
|
|
(void *)&thisFont,
|
|
sizeof(LOCALFONT));
|
|
|
|
//
|
|
// Count this font.
|
|
//
|
|
TRACE_OUT(( "Added record %s",
|
|
g_fhFonts->afhFonts[g_fhFonts->fhNumFonts].Details.nfFaceName));
|
|
g_fhFonts->fhNumFonts++;
|
|
|
|
TRACE_OUT(( "g_fhFonts->fhNumFonts now %u", g_fhFonts->fhNumFonts));
|
|
|
|
DC_EXIT_POINT:
|
|
DebugExitVOID(FHAddFontToLocalTable);
|
|
}
|
|
|
|
//
|
|
// FHConsiderRemoteFonts
|
|
//
|
|
// Considers the remote fonts for a single remote person.
|
|
//
|
|
// Takes the existing number of supported fonts, and returns the number
|
|
// that are still common after considering this person.
|
|
//
|
|
UINT ASShare::FHConsiderRemoteFonts
|
|
(
|
|
UINT cCanSend,
|
|
ASPerson * pasPerson
|
|
)
|
|
{
|
|
UINT iLocal;
|
|
UINT iRemote;
|
|
UINT cCanReceive=0;
|
|
BOOL fCanReceive, fOnlyAscii;
|
|
UINT sendSupportCode;
|
|
UINT bestSupportSoFar;
|
|
|
|
DebugEntry(ASShare::FHConsiderRemoteFonts);
|
|
|
|
ValidatePerson(pasPerson);
|
|
//
|
|
// Consider each of the still valid local fonts, and see if the remote
|
|
// person also supports them.
|
|
//
|
|
|
|
//
|
|
// SFR5396: LOOP ONE
|
|
//
|
|
// Look through all the LOCAL fonts, for ones where we find a match in
|
|
// the remote font table. These are fonts we can SEND, and for which
|
|
// we must set g_fhFonts->afhFonts[].Supported.
|
|
//
|
|
// We also set the rfLocalHandle for remote fonts that we can receive
|
|
// if we encounter them in this search. We complete the search for
|
|
// remote fonts that we can receive in LOOP TWO.
|
|
//
|
|
// Things we check in this loop: - we may already know there is no
|
|
// match for this local name
|
|
// so drop out quickly. - otherwise check through EVERY REMOTE
|
|
// font looking for the
|
|
// best possible match. (If we find an EXACT match, leave the
|
|
// inner loop early)
|
|
//
|
|
//
|
|
for (iLocal=0;
|
|
(cCanSend > 0) && (iLocal < g_fhFonts->fhNumFonts);
|
|
iLocal++)
|
|
{
|
|
if (g_fhFonts->afhFonts[iLocal].SupportCode != FH_SC_NO_MATCH)
|
|
{
|
|
//
|
|
//
|
|
// This font is still valid so check it with all the remote
|
|
// fonts for this person.
|
|
//
|
|
// Things we check in this loop:
|
|
// - do the face names match? if no - try next remote font.
|
|
// - the pitch: if one is FIXED pitch and one isn't try next
|
|
// - the codepages: are the local/remote the same? This
|
|
// determines whether we send only ASCII chars.
|
|
// - scalability: possible combinations are:
|
|
// local fixed/remote scalable (can send/not rcv)
|
|
// local scalable/remote scalable (can send and rcv)
|
|
// local fixed/remote fixed, sizes match (send & rcv)
|
|
// local scalable/remote fixed (cannot send/can rcv)
|
|
// for this last case, keep trying the remote fonts.
|
|
//
|
|
// In "back level" calls to Pre-R11 boxes we stop here but
|
|
// force the matches to be approximate. Otherwise check
|
|
//
|
|
// - aspect ratios (if present): must match or try the
|
|
// next remote font.
|
|
// - signatures: these are used to finally decide whether
|
|
// the fonts are exact matches; good enough to treat as
|
|
// approximate matches or such poor matches that the
|
|
// font is not supported (cannot be sent).
|
|
//
|
|
//
|
|
|
|
//
|
|
// Handy SHORTHAND macroes.
|
|
//
|
|
#define REMOTEFONT pasPerson->poeFontInfo[iRemote]
|
|
#define LOCALFT g_fhFonts->afhFonts[iLocal]
|
|
#define LOCALDETS LOCALFT.Details
|
|
|
|
//
|
|
// Initially assume that the fonts do not match, but that
|
|
// if they do they will match across the whole codepage
|
|
// (not just the ascii set).
|
|
//
|
|
sendSupportCode = FH_SC_NO_MATCH;
|
|
bestSupportSoFar = FH_SC_NO_MATCH;
|
|
fOnlyAscii = FALSE;
|
|
|
|
//
|
|
//
|
|
// Loop through all the remote fonts looking to see which, if
|
|
// any, offers the best possible match. Initially,
|
|
// sendSupportCode is set to NO_MATCH; as we go through each
|
|
// iteration we see if we can improve on the current setting
|
|
// of sendSupportCode. We leave the loop as soon as we find
|
|
// an EXACT_MATCH ('cos we are not going to do any better than
|
|
// that!) or when we run out of remote fonts. The best match
|
|
// found so far is kept in bestSupportSoFar.
|
|
//
|
|
//
|
|
for (iRemote = 0;
|
|
(iRemote < pasPerson->oecFonts)
|
|
&& (sendSupportCode != FH_SC_EXACT_MATCH);
|
|
iRemote++)
|
|
{
|
|
//
|
|
// If the remote font is already flagged as having no
|
|
// possible match then skip out now. (We set this field
|
|
// during the initial processing of the remote font).
|
|
//
|
|
if (REMOTEFONT.rfLocalHandle==NO_FONT_MATCH)
|
|
{
|
|
continue; // SFR5279
|
|
}
|
|
|
|
//
|
|
// Check the face names...
|
|
//
|
|
if (lstrcmp(LOCALDETS.nfFaceName,
|
|
g_fhFonts->afhFonts[REMOTEFONT.rfLocalHandle].Details.nfFaceName))
|
|
{
|
|
continue;
|
|
}
|
|
TRACE_OUT(( "Matched Remote Face Name %s",
|
|
g_fhFonts->afhFonts[REMOTEFONT.rfLocalHandle]
|
|
.Details.nfFaceName));
|
|
|
|
//
|
|
// Check the pitch...
|
|
//
|
|
if( (LOCALDETS.nfFontFlags & NF_FIXED_PITCH)!=
|
|
(REMOTEFONT.rfFontFlags & NF_FIXED_PITCH) )
|
|
{
|
|
TRACE_OUT(( "Different Pitch %x %x",
|
|
LOCALDETS.nfFontFlags,
|
|
REMOTEFONT.rfFontFlags));
|
|
continue;
|
|
}
|
|
|
|
//
|
|
//
|
|
// If both systems support the font CodePage capability
|
|
// (indicated by the remote capability flags - which are
|
|
// the union of remote and local by now), check that the
|
|
// CodePages and CodePage flags match, and if not,
|
|
// restrict ourselves to sending the ASCII subset.
|
|
//
|
|
// If we support the font CodePage capability but remote
|
|
// system does not, then restrict ourselves to sending the
|
|
// ASCII subset.
|
|
//
|
|
// If we do not support the font CodePage capability, then
|
|
// we assume that the remote is only sending ANSI CodePage,
|
|
// either because it doesn't know about the font CodePage
|
|
// capability or because it can see that we don't support
|
|
// it. Therefore, we do not need to check the CodePage.
|
|
// BUT: restrict ourselves to ASCII only.
|
|
//
|
|
//
|
|
if (!(m_pasLocal->cpcCaps.orders.capsfFonts & CAPS_FONT_CODEPAGE))
|
|
{
|
|
//
|
|
// We do not support codepage checking.
|
|
//
|
|
TRACE_OUT(( "not checking CP"));
|
|
fOnlyAscii = TRUE;
|
|
}
|
|
|
|
if ((m_oeCombinedOrderCaps.capsfFonts & CAPS_FONT_CODEPAGE)
|
|
&& (LOCALDETS.nfCodePage != REMOTEFONT.rfCodePage) )
|
|
{
|
|
TRACE_OUT(( "Different CPs %hu %hu",
|
|
LOCALDETS.nfCodePage,
|
|
REMOTEFONT.rfCodePage));
|
|
//
|
|
//
|
|
// Assume that all codepages include ASCII.
|
|
//
|
|
//
|
|
fOnlyAscii = TRUE;
|
|
}
|
|
|
|
//
|
|
//
|
|
// If we support codepage, but the remote does not then
|
|
// the remote will only be sending us ANSI chars. Make sure
|
|
// that we send only ASCII subset.
|
|
//
|
|
//
|
|
if ((m_pasLocal->cpcCaps.orders.capsfFonts & CAPS_FONT_CODEPAGE) &&
|
|
!(m_oeCombinedOrderCaps.capsfFonts & CAPS_FONT_CODEPAGE))
|
|
{
|
|
TRACE_OUT(( "Only ASCII"));
|
|
fOnlyAscii = TRUE;
|
|
}
|
|
|
|
//
|
|
//
|
|
// The face names and CodePages match and the fonts are of
|
|
// the same type of pitch (ie both are fixed pitch or both
|
|
// are variable pitch).
|
|
//
|
|
//
|
|
if ((REMOTEFONT.rfFontFlags & NF_FIXED_SIZE) == 0)
|
|
{
|
|
//
|
|
//
|
|
// The remote font is scalable, so we can send any font
|
|
// (with this facename) to the remote system, even if
|
|
// the local font is fixed sized. Set sendSupportCode
|
|
// to FH_SC_EXACT_MATCH now - we will change this to
|
|
// FH_SC_APPROX_MATCH later if other fields differ.
|
|
//
|
|
//
|
|
TRACE_OUT((
|
|
"Person [%d] Can SEND: remote SCALABLE %s (remote)%u to (local)%u",
|
|
pasPerson->mcsID,
|
|
LOCALDETS.nfFaceName,
|
|
iRemote, iLocal));
|
|
sendSupportCode = FH_SC_EXACT_MATCH;
|
|
|
|
//
|
|
//
|
|
// SFR5396: it is true that we can SEND this font
|
|
// because the remote version of the font is scalable.
|
|
// That does not mean that we can necessarily receive
|
|
// the font... unless ours is scalable too.
|
|
//
|
|
//
|
|
if ((LOCALDETS.nfFontFlags & NF_FIXED_SIZE)==0)
|
|
{
|
|
TRACE_OUT((
|
|
"Person [%d] Can RECEIVE remote font %u as local %u",
|
|
pasPerson->mcsID, iRemote, iLocal));
|
|
REMOTEFONT.rfLocalHandle = (TSHR_UINT16)iLocal;
|
|
}
|
|
}
|
|
else if (LOCALDETS.nfFontFlags & NF_FIXED_SIZE)
|
|
{
|
|
//
|
|
//
|
|
// The remote font is fixed size and so is the local
|
|
// one, so check if the sizes match exactly.
|
|
//
|
|
//
|
|
if ((LOCALDETS.nfAveWidth == REMOTEFONT.rfAveWidth) &&
|
|
(LOCALDETS.nfAveHeight == REMOTEFONT.rfAveHeight))
|
|
{
|
|
//
|
|
//
|
|
// Our fixed size local font is the same as the
|
|
// fixed size font at the remote. We set
|
|
// sendSupportCode to FH_SC_EXACT_MATCH now - we
|
|
// will change this to FH_SC_APPROX_MATCH later if
|
|
// other fields differ.
|
|
//
|
|
//
|
|
TRACE_OUT(("Person [%d] Matched remote fixed font %s %u to %u",
|
|
pasPerson->mcsID,
|
|
LOCALDETS.nfFaceName,
|
|
iRemote, iLocal));
|
|
sendSupportCode = FH_SC_EXACT_MATCH;
|
|
REMOTEFONT.rfLocalHandle = (TSHR_UINT16)iLocal;
|
|
}
|
|
else
|
|
{
|
|
TRACE_OUT(( "rejected %s ave width/heights "
|
|
"local/remote width %d/%d height %d/%d",
|
|
LOCALDETS.nfFaceName,
|
|
LOCALDETS.nfAveWidth,
|
|
REMOTEFONT.rfAveWidth,
|
|
LOCALDETS.nfAveHeight,
|
|
REMOTEFONT.rfAveHeight));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
TRACE_OUT((
|
|
"Can only RECEIVE %s %u Remote is fixed, but local %u not",
|
|
LOCALDETS.nfFaceName,
|
|
iRemote,
|
|
iLocal));
|
|
//
|
|
//
|
|
// SFR5396: while we cannot SEND this font because our
|
|
// local version is scalable, but the remote's is
|
|
// fixed - we can still receive the font in an order.
|
|
//
|
|
//
|
|
REMOTEFONT.rfLocalHandle = (TSHR_UINT16)iLocal;
|
|
}
|
|
|
|
//
|
|
//
|
|
// If we have have set the send support code to indicate
|
|
// that we have matched we now consider any R1.1 info if it
|
|
// is present. As a result of this we may adjust the send
|
|
// support code (from indicating an exact match) to
|
|
// indicate either an approximate match or no match at all.
|
|
//
|
|
//
|
|
if (!pasPerson->oecFonts)
|
|
{
|
|
//
|
|
//
|
|
// The remote system did not send us any R11 font
|
|
// info. In this case we assume all font matches are
|
|
// approximate and restrict ourselves to the ascii
|
|
// subset.
|
|
//
|
|
//
|
|
if (sendSupportCode != FH_SC_NO_MATCH)
|
|
{
|
|
TRACE_OUT(( "No R11 so approx match only"));
|
|
sendSupportCode = FH_SC_APPROX_ASCII_MATCH;
|
|
}
|
|
}
|
|
else if (sendSupportCode != FH_SC_NO_MATCH)
|
|
{
|
|
//
|
|
//
|
|
// The remote system did send us R11 font info and
|
|
// the font is flagged as matching.
|
|
//
|
|
//
|
|
|
|
if ((m_oeCombinedOrderCaps.capsfFonts
|
|
& CAPS_FONT_R20_SIGNATURE)!=0)
|
|
{
|
|
//
|
|
//
|
|
// Check the signatures.
|
|
//
|
|
//
|
|
TRACE_OUT((
|
|
"Person [%d] local %d (remote %d) signatures (x%.4hx%.2hx%.2hx v x%.4hx%.2hx%.2hx)",
|
|
pasPerson->mcsID,
|
|
iLocal,
|
|
iRemote,
|
|
LOCALDETS.nfSigSymbol,
|
|
(TSHR_UINT16)(LOCALDETS.nfSigThins),
|
|
(TSHR_UINT16)(LOCALDETS.nfSigFats),
|
|
REMOTEFONT.rfSigSymbol,
|
|
(TSHR_UINT16)(REMOTEFONT.rfSigThins),
|
|
(TSHR_UINT16)(REMOTEFONT.rfSigFats)));
|
|
|
|
if ((LOCALDETS.nfSigFats != REMOTEFONT.rfSigFats) ||
|
|
(LOCALDETS.nfSigThins != REMOTEFONT.rfSigThins) ||
|
|
(LOCALDETS.nfSigSymbol != REMOTEFONT.rfSigSymbol) ||
|
|
(REMOTEFONT.rfSigSymbol == NF_NO_SIGNATURE))
|
|
{
|
|
//
|
|
// Decide what to do from the signatures.
|
|
//
|
|
if (REMOTEFONT.rfSigSymbol == NF_NO_SIGNATURE)
|
|
{
|
|
TRACE_OUT(("NO match: remote no signature"));
|
|
sendSupportCode = FH_SC_APPROX_ASCII_MATCH;
|
|
}
|
|
else if ((LOCALDETS.nfSigFats == REMOTEFONT.rfSigFats)
|
|
&& (LOCALDETS.nfSigThins == REMOTEFONT.rfSigThins))
|
|
{
|
|
TRACE_OUT(( "our ASCII sigs match"));
|
|
sendSupportCode = FH_SC_EXACT_ASCII_MATCH;
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// NOTE:
|
|
// We could use the "closeness" of the fat
|
|
// and thin signatures to help us decide
|
|
// whether to use approximate matching or
|
|
// not. But currently we don't.
|
|
//
|
|
TRACE_OUT(( "Sig mismatch: APPROX_ASC"));
|
|
sendSupportCode = FH_SC_APPROX_ASCII_MATCH;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//
|
|
//
|
|
// All signatures match exactly.
|
|
// Leave SendSupportCode as FH_SC_EXACT_MATCH
|
|
//
|
|
//
|
|
TRACE_OUT(("EXACT MATCH: Signatures match exactly"));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Not using signatures. Do we care?
|
|
//
|
|
sendSupportCode = FH_SC_APPROX_MATCH;
|
|
TRACE_OUT(( "APPROX MATCH: no sigs"));
|
|
}
|
|
|
|
//
|
|
//
|
|
// Check the aspect ratio - but only if we do not
|
|
// already know that this font does not match.
|
|
//
|
|
//
|
|
if ( (sendSupportCode!=FH_SC_NO_MATCH) &&
|
|
( (!(m_oeCombinedOrderCaps.capsfFonts
|
|
& CAPS_FONT_ASPECT))
|
|
|| (LOCALDETS.nfAspectX != REMOTEFONT.rfAspectX)
|
|
|| (LOCALDETS.nfAspectY != REMOTEFONT.rfAspectY) ))
|
|
{
|
|
//
|
|
//
|
|
// Either no aspect ratio was supplied or the
|
|
// aspect ratio differed.
|
|
//
|
|
//
|
|
if (sendSupportCode == FH_SC_EXACT_MATCH)
|
|
{
|
|
//
|
|
// Force delta-X text orders for mismatched
|
|
// aspect ratio. Note we tested above to
|
|
// see whether supportCode == EXACT because if
|
|
// we have already "downgraded" support then
|
|
// we do not need to change it here
|
|
//
|
|
sendSupportCode = FH_SC_APPROX_MATCH;
|
|
TRACE_OUT(( "AR mismatch: APPROX_MATCH"));
|
|
}
|
|
else if (sendSupportCode == FH_SC_EXACT_ASCII_MATCH)
|
|
{
|
|
//
|
|
// Same again but for ASCII only.
|
|
//
|
|
sendSupportCode = FH_SC_APPROX_ASCII_MATCH;
|
|
TRACE_OUT(( "AR mismatch: APPROX_ASCII_MATCH"));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (sendSupportCode != FH_SC_NO_MATCH)
|
|
{
|
|
//
|
|
//
|
|
// Is this a better match than any we have seen
|
|
// before?
|
|
//
|
|
//
|
|
switch (sendSupportCode)
|
|
{
|
|
case FH_SC_EXACT_MATCH:
|
|
case FH_SC_APPROX_MATCH:
|
|
//
|
|
//
|
|
// Note that we do not have to worry about
|
|
// overwriting a bestSupportSoFar of EXACT
|
|
// with APPROX because we leave the loop when
|
|
// we get an exact match.
|
|
//
|
|
//
|
|
bestSupportSoFar = sendSupportCode;
|
|
break;
|
|
|
|
case FH_SC_EXACT_ASCII_MATCH:
|
|
//
|
|
//
|
|
// An approximate match over the whole 255
|
|
// code points is better than an exact one
|
|
// over just the ascii-s. Debatable, but that
|
|
// is what I have decided.
|
|
//
|
|
//
|
|
if (bestSupportSoFar != FH_SC_APPROX_MATCH)
|
|
{
|
|
bestSupportSoFar = FH_SC_EXACT_ASCII_MATCH;
|
|
}
|
|
break;
|
|
|
|
case FH_SC_APPROX_ASCII_MATCH:
|
|
//
|
|
//
|
|
// An approximate match over just the ascii-s
|
|
// is better than nothing at all!
|
|
//
|
|
//
|
|
if (bestSupportSoFar == FH_SC_NO_MATCH)
|
|
{
|
|
bestSupportSoFar = FH_SC_APPROX_ASCII_MATCH;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ERROR_OUT(("invalid support code"));
|
|
break;
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
sendSupportCode = bestSupportSoFar;
|
|
|
|
//
|
|
// If we matched the remote font, we have already updated
|
|
// its local handle to
|
|
// the matched local font. While the local handle was already
|
|
// set up, it was only set up to the first local font with the
|
|
// same facename, rather than the correct font.
|
|
//
|
|
// If we did not match the remote font, mark it as not
|
|
// supported, and decrement the common font count.
|
|
//
|
|
if (sendSupportCode != FH_SC_NO_MATCH)
|
|
{
|
|
TRACE_OUT(( "Local font %d/%s can be SENT (code=%u)",
|
|
iLocal,
|
|
LOCALDETS.nfFaceName,
|
|
sendSupportCode));
|
|
if (fOnlyAscii)
|
|
{
|
|
if (sendSupportCode == FH_SC_EXACT_MATCH)
|
|
{
|
|
sendSupportCode = FH_SC_EXACT_ASCII_MATCH;
|
|
TRACE_OUT(( "Adjust %d/%s to EXACT_ASC (code=%u)",
|
|
iLocal,
|
|
LOCALDETS.nfFaceName,
|
|
sendSupportCode));
|
|
}
|
|
else
|
|
{
|
|
TRACE_OUT(( "Adjust %d/%s to APPROX_ASC (code=%u)",
|
|
iLocal,
|
|
LOCALDETS.nfFaceName,
|
|
sendSupportCode));
|
|
sendSupportCode = FH_SC_APPROX_ASCII_MATCH;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
TRACE_OUT(( "Local font %d/%s cannot be SENT",
|
|
iLocal,LOCALDETS.nfFaceName));
|
|
cCanSend--;
|
|
}
|
|
|
|
LOCALFT.SupportCode &= sendSupportCode;
|
|
}
|
|
else
|
|
{
|
|
TRACE_OUT(( "Cannot SEND %d/%s",iLocal,LOCALDETS.nfFaceName));
|
|
}
|
|
}
|
|
|
|
//
|
|
//
|
|
// SFR5396: LOOP TWO
|
|
//
|
|
// Loop through all the remote fonts, looking for ones where we have
|
|
// a locally matching font. These are fonts that we can RECEIVE in
|
|
// orders, and for which we need to map the remote font handle to the
|
|
// local font handle. This means setting REMOTEFONT.rfLocalHandle.
|
|
//
|
|
// By the time we reach here, REMOTEFONT.rfLocalHandle is already set
|
|
// to:
|
|
// - NO_FONT_MATCH (in FH_ProcessRemoteFonts)
|
|
// or the index in the local table of a definite match found in LOOP1
|
|
// or the index of the first entry in the local table with the
|
|
// same face name as the remote font (set in FH_ProcessRemoteFonts)
|
|
//
|
|
// so - we can begin our search in the local table from
|
|
// REMOTEFONT.rfLocalHandle.
|
|
//
|
|
//
|
|
for (iRemote = 0;
|
|
(iRemote < pasPerson->oecFonts);
|
|
iRemote++)
|
|
{
|
|
iLocal = REMOTEFONT.rfLocalHandle;
|
|
if (iLocal == NO_FONT_MATCH)
|
|
{
|
|
//
|
|
// We have no fonts whatsoever that match this font name
|
|
// Go round again... try the next REMOTE font.
|
|
//
|
|
continue;
|
|
}
|
|
|
|
TRACE_OUT(( "Can we receive %s?",
|
|
g_fhFonts->afhFonts[REMOTEFONT.rfLocalHandle].Details.nfFaceName));
|
|
for (fCanReceive = FALSE;
|
|
(iLocal < g_fhFonts->fhNumFonts) && (!fCanReceive);
|
|
iLocal++)
|
|
{
|
|
//
|
|
// Check the face names...
|
|
//
|
|
if (lstrcmp(LOCALDETS.nfFaceName,
|
|
g_fhFonts->afhFonts[REMOTEFONT.rfLocalHandle].Details.nfFaceName))
|
|
{
|
|
//
|
|
// Try the next LOCAL font.
|
|
//
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// Check the pitch...
|
|
//
|
|
if((LOCALDETS.nfFontFlags & NF_FIXED_PITCH)!=
|
|
(REMOTEFONT.rfFontFlags & NF_FIXED_PITCH))
|
|
{
|
|
//
|
|
// Different pitches, try the next local font.
|
|
//
|
|
TRACE_OUT(( "Pitch mismatch"));
|
|
continue;
|
|
}
|
|
|
|
//
|
|
//
|
|
// The face names match and the fonts are of
|
|
// the same type of pitch (ie both are fixed pitch or both
|
|
// are variable pitch).
|
|
//
|
|
//
|
|
if ((REMOTEFONT.rfFontFlags & NF_FIXED_SIZE) == 0)
|
|
{
|
|
if ((LOCALDETS.nfFontFlags & NF_FIXED_SIZE)==0)
|
|
{
|
|
//
|
|
//
|
|
// The remote font is scalable. Ours is also
|
|
// scalable then we can receive the font.
|
|
//
|
|
// We do not need to look at any more LOCAL fonts.
|
|
//
|
|
//
|
|
fCanReceive = TRUE;
|
|
}
|
|
}
|
|
else if (LOCALDETS.nfFontFlags & NF_FIXED_SIZE)
|
|
{
|
|
//
|
|
//
|
|
// The remote font is fixed size and so is the local
|
|
// one, so check if the sizes match exactly.
|
|
//
|
|
//
|
|
if ((LOCALDETS.nfAveWidth == REMOTEFONT.rfAveWidth) &&
|
|
(LOCALDETS.nfAveHeight == REMOTEFONT.rfAveHeight))
|
|
{
|
|
//
|
|
//
|
|
// Our fixed size local font is the same as the
|
|
// fixed size font at the remote.
|
|
//
|
|
// We do not need to look at any more LOCAL fonts.
|
|
//
|
|
//
|
|
fCanReceive = TRUE;
|
|
}
|
|
else
|
|
{
|
|
TRACE_OUT(( "different fixed sizes"));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//
|
|
//
|
|
// The remote is FIXED but the LOCAL is scalable. We
|
|
// can receive orders for text of this type (but not send)
|
|
//
|
|
// We do not need to look at any more LOCAL fonts.
|
|
//
|
|
//
|
|
fCanReceive = TRUE;
|
|
}
|
|
|
|
if (fCanReceive)
|
|
{
|
|
TRACE_OUT(("Person [%d] Can RECEIVE remote font %s %u as %u",
|
|
pasPerson->mcsID,
|
|
LOCALDETS.nfFaceName,
|
|
iRemote, iLocal));
|
|
REMOTEFONT.rfLocalHandle = (TSHR_UINT16)iLocal;
|
|
cCanReceive++;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
TRACE_OUT(("Person [%d] Can SEND %d fonts", pasPerson->mcsID, cCanSend));
|
|
TRACE_OUT(("Person [%d] Can RECEIVE %d fonts", pasPerson->mcsID, cCanReceive));
|
|
|
|
DebugExitDWORD(ASShare::FHConsiderRemoteFonts, cCanSend);
|
|
return(cCanSend);
|
|
}
|
|
|
|
//
|
|
// FHMaybeEnableText
|
|
//
|
|
// Enables or disables sending of text orders
|
|
//
|
|
void ASShare::FHMaybeEnableText(void)
|
|
{
|
|
BOOL fEnableText = FALSE;
|
|
ASPerson * pasPerson;
|
|
|
|
DebugEntry(ASShare::FHMaybeEnableText);
|
|
|
|
//
|
|
// To enable sending text orders we must have sent out our own packet
|
|
// of fonts, and there must be no outstanding remote packets required.
|
|
//
|
|
if (m_fhLocalInfoSent)
|
|
{
|
|
//
|
|
// Assume we can enable text orders.
|
|
//
|
|
fEnableText = TRUE;
|
|
|
|
//
|
|
// The local info was sent, so check remote dudes (not us)
|
|
//
|
|
ValidatePerson(m_pasLocal);
|
|
for (pasPerson = m_pasLocal->pasNext; pasPerson != NULL; pasPerson = pasPerson->pasNext)
|
|
{
|
|
ValidatePerson(pasPerson);
|
|
|
|
if (!pasPerson->oecFonts)
|
|
{
|
|
//
|
|
// We have found a font packet that we have not yet
|
|
// received, so must disable sending text, and can break
|
|
// out of the search.
|
|
//
|
|
TRACE_OUT(( "No font packet yet from person [%d]", pasPerson->mcsID));
|
|
fEnableText = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
TRACE_OUT(( "Local font info not yet sent"));
|
|
}
|
|
|
|
OE_EnableText(fEnableText);
|
|
|
|
if (g_asCanHost)
|
|
{
|
|
//
|
|
// Pass on new font data to the other tasks.
|
|
//
|
|
if (fEnableText)
|
|
{
|
|
OE_NEW_FONTS newFontData;
|
|
|
|
//
|
|
// Copy the data from the Share Core.
|
|
//
|
|
newFontData.fontCaps = m_oeCombinedOrderCaps.capsfFonts;
|
|
newFontData.countFonts = (WORD)g_fhFonts->fhNumFonts;
|
|
newFontData.fontData = g_fhFonts->afhFonts;
|
|
newFontData.fontIndex = g_fhFonts->afhFontIndex;
|
|
|
|
TRACE_OUT(( "Sending %d Fonts", g_fhFonts->fhNumFonts));
|
|
|
|
//
|
|
// Notify display driver of new fonts
|
|
//
|
|
OSI_FunctionRequest(OE_ESC_NEW_FONTS,
|
|
(LPOSI_ESCAPE_HEADER)&newFontData,
|
|
sizeof(newFontData));
|
|
}
|
|
}
|
|
|
|
DebugExitVOID(ASShare::FHMaybeEnableText);
|
|
}
|
|
|
|
//
|
|
// FHGetLocalFontHandle
|
|
//
|
|
// Translate a remote font handle/local ID pair to a local font handle.
|
|
//
|
|
UINT ASShare::FHGetLocalFontHandle
|
|
(
|
|
UINT remotefont,
|
|
ASPerson * pasPerson
|
|
)
|
|
{
|
|
DebugEntry(ASShare::FHGetLocalFontHandle);
|
|
|
|
ValidatePerson(pasPerson);
|
|
|
|
if (!pasPerson->oecFonts)
|
|
{
|
|
WARNING_OUT(("Order packet from [%d] but no fonts", pasPerson->mcsID));
|
|
}
|
|
|
|
if (remotefont == DUMMY_FONT_ID)
|
|
{
|
|
//
|
|
// The dummy font ID has been supplied for the remote font Id.
|
|
// Substitute the first valid local font Id.
|
|
//
|
|
for (remotefont = 0;
|
|
remotefont < pasPerson->oecFonts;
|
|
remotefont++)
|
|
{
|
|
if (pasPerson->poeFontInfo[remotefont].rfLocalHandle !=
|
|
NO_FONT_MATCH)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (remotefont >= pasPerson->oecFonts)
|
|
{
|
|
//
|
|
// The remote font is invalid.
|
|
// There is no error value, we simply return the valid but
|
|
// incorrect value 0.
|
|
//
|
|
TRACE_OUT(("Person [%d] Invalid font handle %u",
|
|
pasPerson->mcsID, remotefont));
|
|
return(0);
|
|
}
|
|
|
|
DebugExitVOID(ASShare::FHGetLocalFontHandle);
|
|
return(pasPerson->poeFontInfo[remotefont].rfLocalHandle);
|
|
}
|
|
|
|
|
|
//
|
|
//
|
|
// FUNCTION: FHCalculateSignatures
|
|
//
|
|
// DESCRIPTION:
|
|
//
|
|
// Given a width table, calculates the three font signatures that are
|
|
// included in the R2.0 NETWORKFONT structure.
|
|
//
|
|
// PARAMETERS:
|
|
//
|
|
// pTable - pointer to width table
|
|
// pSigFats, pSigThins, pSigSymbol - return the three signatures
|
|
//
|
|
// RETURNS:
|
|
//
|
|
// None
|
|
//
|
|
//
|
|
void FHCalculateSignatures(PFHWIDTHTABLE pTable,
|
|
LPTSHR_INT16 pSigFats,
|
|
LPTSHR_INT16 pSigThins,
|
|
LPTSHR_INT16 pSigSymbol)
|
|
{
|
|
UINT charI = 0;
|
|
UINT fatSig = 0;
|
|
UINT thinSig = 0;
|
|
UINT symbolSig = 0;
|
|
|
|
DebugEntry(FHCalculateSignatures);
|
|
|
|
ASSERT((pTable != NULL));
|
|
ASSERT((pSigFats != NULL));
|
|
ASSERT((pSigThins != NULL));
|
|
ASSERT((pSigSymbol != NULL));
|
|
|
|
//
|
|
// nfSigFats the sum of the widths (in pels) of the chars
|
|
// 0-9,@-Z,$,%,&. divided by two: the fat chars
|
|
// nfSigThins the sum of the widths (in pels) of the chars
|
|
// 0x20->0x7F EXCLUDING those summed in nfSigFats.
|
|
// Again - divided by two. The thin chars.
|
|
// nfSigSymbol The sum of the widths (in pels) of the chars
|
|
// x80->xFF.
|
|
//
|
|
|
|
//
|
|
// Loop for 0-9, some punctuation, A-Z. Then add $,% and &. i.e. mainly
|
|
// fat characters.
|
|
//
|
|
for (charI= NF_ASCII_ZERO; charI<NF_ASCII_Z ; charI++ )
|
|
{
|
|
fatSig += pTable->charWidths[charI];
|
|
}
|
|
fatSig += pTable->charWidths[NF_ASCII_DOLLAR] +
|
|
pTable->charWidths[NF_ASCII_PERCENT] +
|
|
pTable->charWidths[NF_ASCII_AMPERSAND];
|
|
|
|
//
|
|
// thin sig covers the rest of the "ascii" characters (x20->7F) not
|
|
// already included in fatSig.
|
|
//
|
|
for (charI= NF_ASCII_FIRST; charI<NF_ASCII_LAST ; charI++ )
|
|
{
|
|
thinSig += pTable->charWidths[charI];
|
|
}
|
|
thinSig -= fatSig;
|
|
|
|
//
|
|
// symbolSig covers the "non-ascii" characters (x0->1F, 80->FF)
|
|
//
|
|
for (charI= 0x00; charI<(NF_ASCII_FIRST-1) ; charI++ )
|
|
{
|
|
symbolSig += pTable->charWidths[charI];
|
|
}
|
|
for (charI= NF_ASCII_LAST+1; charI<0xFF ; charI++ )
|
|
{
|
|
symbolSig += pTable->charWidths[charI];
|
|
}
|
|
TRACE_OUT(( "Signatures: symbol %#lx thin %#lx fat %#lx",
|
|
symbolSig, thinSig, fatSig));
|
|
|
|
//
|
|
// Halve the fat and thin sigs so that they fit into one byte each.
|
|
//
|
|
fatSig /= 2;
|
|
thinSig /= 2;
|
|
if ( (((TSHR_UINT16)symbolSig)==0)
|
|
&& (((BYTE)fatSig)==0) && (((BYTE)thinSig)==0))
|
|
{
|
|
//
|
|
// Worry about the faint possibility that all three sums could add
|
|
// up to a value of zero when truncated.
|
|
//
|
|
symbolSig=1;
|
|
}
|
|
|
|
//
|
|
// Fill in return pointers.
|
|
//
|
|
*pSigFats = (TSHR_INT16)fatSig;
|
|
*pSigThins = (TSHR_INT16)thinSig;
|
|
*pSigSymbol = (TSHR_INT16)symbolSig;
|
|
|
|
DebugExitVOID(FHCalculateSignatures);
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// FHEachFontFamily
|
|
//
|
|
// This callback is called for each font family. We use it to build up a
|
|
// list of all the family names.
|
|
//
|
|
//
|
|
// Although wingdi.h defines the first two parameters for an ENUMFONTPROC
|
|
// as LOGFONT and TEXTMETRIC (thereby disagreeing with MSDN), tests show
|
|
// that the structures are actually as defined in MSDN (i.e. we get valid
|
|
// information when accessing the extended fields)
|
|
//
|
|
int CALLBACK FHEachFontFamily
|
|
(
|
|
const ENUMLOGFONT FAR * enumlogFont,
|
|
const NEWTEXTMETRIC FAR * TextMetric,
|
|
int FontType,
|
|
LPARAM lParam
|
|
)
|
|
{
|
|
LPFHFAMILIES lpFamilies = (LPFHFAMILIES)lParam;
|
|
|
|
DebugEntry(FHEachFontFamily);
|
|
|
|
ASSERT(!IsBadWritePtr(lpFamilies, sizeof(*lpFamilies)));
|
|
|
|
if (lpFamilies->fhcFamilies == FH_MAX_FONTS)
|
|
{
|
|
//
|
|
// We cannot support any more font families so stop enumerating.
|
|
//
|
|
WARNING_OUT(( "Can only handle %u families", FH_MAX_FONTS));
|
|
return(FALSE); // Stop the enumeration
|
|
}
|
|
|
|
TRACE_OUT(("FHEachFontFamily: %s", enumlogFont->elfLogFont.lfFaceName));
|
|
|
|
ASSERT(lstrlen(enumlogFont->elfLogFont.lfFaceName) < FH_FACESIZE);
|
|
lstrcpy(lpFamilies->afhFamilies[lpFamilies->fhcFamilies].szFontName,
|
|
enumlogFont->elfLogFont.lfFaceName);
|
|
|
|
lpFamilies->fhcFamilies++;
|
|
|
|
DebugExitBOOL(FHEachFontFamily, TRUE);
|
|
return(TRUE); // Continue enumerating
|
|
}
|
|
|
|
//
|
|
// FHEachFont
|
|
//
|
|
// This callback is called for each font. It gathers and stores the font
|
|
// details.
|
|
//
|
|
//
|
|
//
|
|
// Although wingdi.h defines the first two parameters for an ENUMFONTPROC
|
|
// as LOGFONT and TEXTMETRIC (thereby disagreeing with MSDN), tests show
|
|
// that the structures are actually as defined in MSDN (i.e. we get valid
|
|
// information when accessing the extended fields)
|
|
//
|
|
int CALLBACK FHEachFont(const ENUMLOGFONT FAR * enumlogFont,
|
|
const NEWTEXTMETRIC FAR * TextMetric,
|
|
int FontType,
|
|
LPARAM lParam)
|
|
{
|
|
HDC hdc = (HDC)lParam;
|
|
TSHR_UINT16 fontflags = 0;
|
|
TSHR_UINT16 CodePage = 0;
|
|
HFONT hfont;
|
|
HFONT holdfont = NULL;
|
|
TEXTMETRIC tm;
|
|
BOOL fAcceptFont;
|
|
int rc;
|
|
|
|
DebugEntry(FHEachFont);
|
|
|
|
TRACE_OUT(( "Family name: %s", enumlogFont->elfLogFont.lfFaceName));
|
|
TRACE_OUT(( "Full name: %s", enumlogFont->elfFullName));
|
|
|
|
if (g_fhFonts->fhNumFonts >= FH_MAX_FONTS)
|
|
{
|
|
//
|
|
// We cannot support any more fonts so stop enumerating.
|
|
//
|
|
WARNING_OUT(( "Can only handle %u fonts", FH_MAX_FONTS));
|
|
rc = 0;
|
|
DC_QUIT; // Stop the enumeration
|
|
}
|
|
|
|
//
|
|
// We want to continue...
|
|
//
|
|
rc = 1;
|
|
|
|
//
|
|
// Don't bother with this if it's a bold/italic variant.
|
|
//
|
|
// NOTE:
|
|
// The elfFullName field is only valid for TrueType fonts on Win95. For
|
|
// non TrueType fonts, assume that the full name and face name are the
|
|
// same.
|
|
//
|
|
if (!g_asWin95 || (FontType & TRUETYPE_FONTTYPE))
|
|
{
|
|
if (lstrcmp(enumlogFont->elfLogFont.lfFaceName, (LPCSTR)enumlogFont->elfFullName))
|
|
{
|
|
TRACE_OUT(( "Discarding variant: %s", enumlogFont->elfFullName));
|
|
DC_QUIT; // Jump out, but don't stop enumerating!
|
|
}
|
|
}
|
|
|
|
//
|
|
// We now accumulate information on all local fonts in all CodePages.
|
|
// This relies on the subsequent sending of local fonts and matching of
|
|
// remote fonts taking into account the CodePage capabilities of the
|
|
// systems.
|
|
//
|
|
|
|
//
|
|
// On this pass we copy the details into our structure.
|
|
//
|
|
if (FontType & TRUETYPE_FONTTYPE)
|
|
{
|
|
//
|
|
// This is a truetype font, which we simply accept without double
|
|
// checking its metrics. (Metric double checking to exclude
|
|
// duplicates is of most relevance to fixed size fonts, which are
|
|
// explicitly optimised for one screen size)
|
|
//
|
|
fAcceptFont = TRUE;
|
|
|
|
//
|
|
// Indicate TrueType (this will go in the NETWORKFONT structure
|
|
// (i.e. over the wire)
|
|
//
|
|
fontflags |= NF_TRUE_TYPE;
|
|
|
|
//
|
|
// Signal that we did not call CreateFont for this font.
|
|
//
|
|
hfont = NULL;
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// We create a font from the logical description, and select it so
|
|
// that we can query its metrics.
|
|
//
|
|
// The point of this is that it allows us to identify fonts where
|
|
// the logical font description is not a unique description of this
|
|
// font, and hence if we cannot get to this font via a logical font
|
|
// description, we cannot get to it at all.
|
|
//
|
|
// If we cannot get to it, then we cannot claim to support it.
|
|
//
|
|
// This selection operation is SLOW - of the order of a couple of
|
|
// seconds in some extreme cases (for example where the font is
|
|
// stored on a network drive, and pageing has to take place) and
|
|
// when you can have hundreds of fonts this can add up to a
|
|
// considerable time.
|
|
//
|
|
// Hence we only do the selection for non truetype fonts because
|
|
// these are the fonts where it is easy to get multiple fonts of
|
|
// the same logical description, though designed for different
|
|
// display drivers.
|
|
//
|
|
|
|
//
|
|
// Create a font from the logical font, so we can see what font
|
|
// Windows actually choses.
|
|
//
|
|
hfont = CreateFontIndirect(&enumlogFont->elfLogFont);
|
|
holdfont = SelectFont(hdc, hfont);
|
|
|
|
//
|
|
// Find the metrics of the font that Windows has actually selected.
|
|
//
|
|
GetTextMetrics(hdc, &tm);
|
|
|
|
//
|
|
// Double check the aspect ratios - enumerate returns all fonts,
|
|
// but it is possible to have fonts that are never matched by
|
|
// Windows due to duplications.
|
|
//
|
|
fAcceptFont = ((tm.tmDigitizedAspectX == TextMetric->tmDigitizedAspectX)
|
|
&& (tm.tmDigitizedAspectY == TextMetric->tmDigitizedAspectY));
|
|
}
|
|
|
|
//
|
|
// Trace out the full text metrics for debugging.
|
|
//
|
|
|
|
if (fAcceptFont)
|
|
{
|
|
//
|
|
// This font is accepted.
|
|
//
|
|
//
|
|
// Determine the font flags settings.
|
|
//
|
|
if ((TextMetric->tmPitchAndFamily & TMPF_FIXED_PITCH) == 0)
|
|
{
|
|
//
|
|
// Setting the TMPF_FIXED_PITCH bit in the text metrics is used
|
|
// to indicate that the font is NOT fixed pitch. What a
|
|
// wonderfully named bit (see Microsoft CD for explanation).
|
|
//
|
|
fontflags |= NF_FIXED_PITCH;
|
|
}
|
|
|
|
if ((FontType & RASTER_FONTTYPE) ||
|
|
(FontType & TRUETYPE_FONTTYPE) == 0)
|
|
{
|
|
//
|
|
// This is a raster font, but not a truetype font so it must be
|
|
// of fixed size.
|
|
//
|
|
fontflags |= NF_FIXED_SIZE;
|
|
}
|
|
|
|
//
|
|
// Get the font CodePage. SFRFONT: must map from CharSet to
|
|
// Codepage. For now we only support ANSI and OEM charsets. This
|
|
// will need to change to support e.g BiDi/Arabic
|
|
//
|
|
CodePage = TextMetric->tmCharSet;
|
|
if (CodePage == ANSI_CHARSET)
|
|
{
|
|
TRACE_OUT(( "ANSI codepage"));
|
|
CodePage = NF_CP_WIN_ANSI;
|
|
}
|
|
else if (CodePage == OEM_CHARSET)
|
|
{
|
|
TRACE_OUT(( "OEM codepage"));
|
|
CodePage = NF_CP_WIN_OEM;
|
|
}
|
|
else if (CodePage == SYMBOL_CHARSET)
|
|
{
|
|
TRACE_OUT(("Symbol codepage"));
|
|
CodePage = NF_CP_WIN_SYMBOL;
|
|
}
|
|
else
|
|
{
|
|
TRACE_OUT(( "Charset %hu, unknown codepage", CodePage));
|
|
CodePage = NF_CP_UNKNOWN;
|
|
}
|
|
|
|
|
|
//
|
|
//
|
|
// SFRFONT: We have replaced the "old" checksum which was based on
|
|
// the actual bits making up the font to one based on the widths of
|
|
// characters in the font. The intention is that we use this to
|
|
// ensure that the actual characters in the local font and in the
|
|
// remote font which matches it are all the same width as each
|
|
// other.
|
|
//
|
|
// We calculate this sum for all fonts (not just non-truetype as
|
|
// before) because in cross platform calls with approximate font
|
|
// matching it applies to fonts of all types.
|
|
//
|
|
//
|
|
|
|
//
|
|
//
|
|
// There is considerable confusion caused by the terminology for
|
|
// fonts characteristics. The protocol uses two values MAXHEIGHT
|
|
// and AVEHEIGHT. In fact neither of these names is accurate
|
|
// (MAXHEIGHT is not the maximum height of a char; and AVEHEIGHT is
|
|
// not the average height of all chars).
|
|
//
|
|
// SFRFONT: we have added maxAscent to the protocol. This is the
|
|
// height of a capital letter (such as eM!) PLUS any internal
|
|
// leading. This value allows remote boxes to find the baseline -
|
|
// the point at which the bottommost pel of a letter with no
|
|
// descenders (e.g. capital M) is to be drawn. This is needed
|
|
// because not all boxes in the call follow the windows convention
|
|
// of specifying the start of text as being the top-left corner of
|
|
// the first character cell. maxAscent == tmAscent in the
|
|
// TextMetric.
|
|
//
|
|
//
|
|
FHAddFontToLocalTable((LPSTR)enumlogFont->elfLogFont.lfFaceName,
|
|
(TSHR_UINT16)fontflags,
|
|
(TSHR_UINT16)CodePage,
|
|
(TSHR_UINT16)TextMetric->tmHeight,
|
|
(TSHR_UINT16)(TextMetric->tmHeight -
|
|
TextMetric->tmInternalLeading),
|
|
(TSHR_UINT16)TextMetric->tmAveCharWidth,
|
|
(TSHR_UINT16)TextMetric->tmDigitizedAspectX,
|
|
(TSHR_UINT16)TextMetric->tmDigitizedAspectY,
|
|
(TSHR_UINT16)TextMetric->tmAscent);
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Windows returns a different font when we use this logical font
|
|
// description - presumably because of duplicate fonts. We
|
|
// therfore must not claim to support this particular font.
|
|
//
|
|
TRACE_OUT(( "Discarding hidden font %s",
|
|
enumlogFont->elfLogFont.lfFaceName));
|
|
}
|
|
|
|
if (hfont)
|
|
{
|
|
//
|
|
// We called CreateFont in processing this font, so now delete it
|
|
// to clean up.
|
|
//
|
|
SelectFont(hdc, holdfont);
|
|
|
|
//
|
|
// We have finished with the font so delete it.
|
|
//
|
|
DeleteFont(hfont);
|
|
}
|
|
|
|
DC_EXIT_POINT:
|
|
DebugExitDWORD(FHEachFont, rc);
|
|
return(rc);
|
|
}
|
|
|
|
|
|
//
|
|
// FHConsiderAllLocalFonts
|
|
//
|
|
// Considers the details of each of the fonts on the local system, and if
|
|
// acceptable adds them to the local font list.
|
|
//
|
|
//
|
|
void FHConsiderAllLocalFonts(void)
|
|
{
|
|
HDC hdcDesktop;
|
|
UINT i;
|
|
UINT iFont;
|
|
LPFONTNAME newFontList;
|
|
LPFHFAMILIES lpFamilies = NULL;
|
|
|
|
DebugEntry(FHConsiderAllLocalFonts);
|
|
|
|
g_fhFonts->fhNumFonts = 0;
|
|
|
|
//
|
|
// We can't enumerate all the fonts directly; we have to enumerate the
|
|
// family names, then the fonts within each family.
|
|
//
|
|
// This alloc assumes the worst case memory-wise (i.e. each
|
|
// family contains a single font) and therefore we will usually
|
|
// allocate more memory than we need. We use LocalReAlloc later to fix
|
|
// this.
|
|
//
|
|
lpFamilies = new FHFAMILIES;
|
|
if (!lpFamilies)
|
|
{
|
|
ERROR_OUT(("Failed to alloc FHFAMILIES"));
|
|
DC_QUIT;
|
|
}
|
|
|
|
SET_STAMP(lpFamilies, FHFAMILIES);
|
|
|
|
hdcDesktop = GetWindowDC(HWND_DESKTOP);
|
|
|
|
//
|
|
// Find all the font family names.
|
|
//
|
|
lpFamilies->fhcFamilies = 0;
|
|
EnumFontFamilies(hdcDesktop, NULL,(FONTENUMPROC)FHEachFontFamily,
|
|
(LPARAM)lpFamilies);
|
|
|
|
TRACE_OUT(("Found %d font families ", lpFamilies->fhcFamilies));
|
|
|
|
//
|
|
// Now enumerate each font for each family
|
|
//
|
|
for (i = 0; i < lpFamilies->fhcFamilies; i++)
|
|
{
|
|
TRACE_OUT(("ASSesion::FHConsiderAllLocalFonts - EnumFontFamilies %s",
|
|
lpFamilies->afhFamilies[i].szFontName));
|
|
|
|
for (iFont = 0; iFont < CFONTS_PROBLEM; iFont++)
|
|
{
|
|
if (!lstrcmpi(lpFamilies->afhFamilies[i].szFontName, c_aszProblemFonts[iFont]))
|
|
{
|
|
WARNING_OUT(("Found problem font %s",
|
|
lpFamilies->afhFamilies[i].szFontName));
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (iFont == CFONTS_PROBLEM)
|
|
{
|
|
//
|
|
// Not in the problem list, go ahead.
|
|
//
|
|
EnumFontFamilies(hdcDesktop, lpFamilies->afhFamilies[i].szFontName,
|
|
(FONTENUMPROC)FHEachFont,
|
|
(LPARAM)hdcDesktop);
|
|
}
|
|
else
|
|
{
|
|
WARNING_OUT(("Skipping problem font %s",
|
|
lpFamilies->afhFamilies[i].szFontName));
|
|
}
|
|
}
|
|
|
|
ReleaseDC(HWND_DESKTOP, hdcDesktop);
|
|
|
|
DC_EXIT_POINT:
|
|
//
|
|
// Having considered all the fonts, we can now free the list of family
|
|
// names.
|
|
//
|
|
if (lpFamilies)
|
|
{
|
|
delete lpFamilies;
|
|
}
|
|
|
|
DebugExitVOID(FHConsiderAllLocalFonts);
|
|
}
|
|
|
|
//
|
|
// FHGenerateFontWidthTable
|
|
//
|
|
BOOL FHGenerateFontWidthTable(PFHWIDTHTABLE pTable,
|
|
LPLOCALFONT pFontInfo,
|
|
UINT fontHeight,
|
|
UINT fontWidth,
|
|
UINT fontWeight,
|
|
UINT fontFlags,
|
|
LPTSHR_UINT16 pMaxAscent)
|
|
|
|
{
|
|
HFONT hNewFont;
|
|
HFONT hOldFont;
|
|
BOOL gdiRC;
|
|
UINT i;
|
|
HDC cachedDC;
|
|
BOOL localRC;
|
|
BOOL functionRC;
|
|
TEXTMETRIC textmetrics;
|
|
int width;
|
|
UINT aFontSizes[256];
|
|
|
|
DebugEntry(FHGenerateFontWidthTable);
|
|
|
|
//
|
|
// Set the return value to FALSE (unsuccessful). We will set it to
|
|
// TRUE later if the function succeeds.
|
|
//
|
|
functionRC = FALSE;
|
|
|
|
//
|
|
// Set the old font handle to NULL. If this is not NULL at the exit
|
|
// point of this function then we will select it back into the cachedDC
|
|
// device context.
|
|
//
|
|
hOldFont = NULL;
|
|
|
|
//
|
|
// Set the new font handle to NULL. If this is not NULL at the exit
|
|
// point of this function then the new font will be deleted.
|
|
//
|
|
hNewFont = NULL;
|
|
|
|
//
|
|
// Get a cached DC with which to do the query.
|
|
//
|
|
cachedDC = GetDC(HWND_DESKTOP);
|
|
if (cachedDC == NULL)
|
|
{
|
|
WARNING_OUT(( "Failed to get DC"));
|
|
DC_QUIT;
|
|
}
|
|
|
|
//
|
|
// Get all the info we need from the local font table.
|
|
//
|
|
|
|
localRC = FH_CreateAndSelectFont(cachedDC,
|
|
&hNewFont,
|
|
&hOldFont,
|
|
pFontInfo->RealName,
|
|
pFontInfo->Details.nfCodePage,
|
|
pFontInfo->lMaxBaselineExt,
|
|
fontHeight,
|
|
fontWidth,
|
|
fontWeight,
|
|
fontFlags);
|
|
|
|
if (localRC == FALSE)
|
|
{
|
|
ERROR_OUT(( "Failed to create/select font %s, %u, %u",
|
|
pFontInfo->RealName,
|
|
fontHeight,
|
|
fontWidth));
|
|
DC_QUIT;
|
|
}
|
|
|
|
//
|
|
// Determine if the current font is a truetype font.
|
|
//
|
|
GetTextMetrics(cachedDC, &textmetrics);
|
|
|
|
if (textmetrics.tmPitchAndFamily & TMPF_TRUETYPE)
|
|
{
|
|
//
|
|
// Truetype fonts are ABC spaced.
|
|
//
|
|
ABC abc[256];
|
|
|
|
TRACE_OUT(("TrueType font %s, first char %d last char %d",
|
|
pFontInfo->RealName, (UINT)(WORD)textmetrics.tmFirstChar,
|
|
(UINT)(WORD)textmetrics.tmLastChar));
|
|
|
|
//
|
|
// Get all widths in one call - faster than getting them separately
|
|
//
|
|
GetCharABCWidths(cachedDC, 0, 255, abc);
|
|
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
width = abc[i].abcA + abc[i].abcB + abc[i].abcC;
|
|
|
|
if ((width < 0) || (width > 255))
|
|
{
|
|
//
|
|
// Width is outside the range we can cope with, so quit.
|
|
//
|
|
TRACE_OUT(( "Width %d is outside range", width));
|
|
DC_QUIT;
|
|
}
|
|
pTable->charWidths[i] = (BYTE)width;
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
TRACE_OUT(( "Non-truetype font"));
|
|
|
|
//
|
|
// Check if the font is fixed or variable pitch - note that a clear
|
|
// bit indicates FIXED, not the reverse which you might expect!
|
|
//
|
|
if ((textmetrics.tmPitchAndFamily & TMPF_FIXED_PITCH) == 0)
|
|
{
|
|
//
|
|
// No need to call GetCharWidth for a fixed width font (and
|
|
// more to the point it can return us bad values if we do)
|
|
//
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
aFontSizes[i] = textmetrics.tmAveCharWidth;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Query the width of each character in the font.
|
|
//
|
|
ZeroMemory(aFontSizes, sizeof(aFontSizes));
|
|
gdiRC = GetCharWidth(cachedDC,
|
|
0,
|
|
255,
|
|
(LPINT)aFontSizes);
|
|
if (gdiRC == FALSE)
|
|
{
|
|
ERROR_OUT(( "Failed to get char widths for %s, %u, %u",
|
|
pFontInfo->RealName,
|
|
fontHeight,
|
|
fontWidth));
|
|
DC_QUIT;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Now copy the widths into the width table.
|
|
// We must adjust the widths to take account of any overhang
|
|
// between characters.
|
|
//
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
width = aFontSizes[i] - textmetrics.tmOverhang;
|
|
if ((width < 0) || (width > 255))
|
|
{
|
|
TRACE_OUT(( "Width %d is outside range", width));
|
|
DC_QUIT;
|
|
}
|
|
pTable->charWidths[i] = (BYTE)width;
|
|
}
|
|
}
|
|
|
|
//
|
|
// The font table has been successfully generated.
|
|
//
|
|
functionRC = TRUE;
|
|
|
|
TRACE_OUT(( "Generated font table for: %s", pFontInfo->RealName));
|
|
|
|
//
|
|
// Return the maxAscent value, as we have easy access to it here. This
|
|
// saves us having to create the font again later to find it.
|
|
//
|
|
TRACE_OUT(( "Updating maxAscent %hu -> %hu",
|
|
*pMaxAscent,
|
|
(TSHR_UINT16)textmetrics.tmAscent));
|
|
*pMaxAscent = (TSHR_UINT16)textmetrics.tmAscent;
|
|
|
|
DC_EXIT_POINT:
|
|
|
|
if (hOldFont != NULL)
|
|
{
|
|
SelectFont(cachedDC, hOldFont);
|
|
}
|
|
|
|
if (hNewFont != NULL)
|
|
{
|
|
DeleteFont(hNewFont);
|
|
}
|
|
|
|
if (cachedDC != NULL)
|
|
{
|
|
ReleaseDC(HWND_DESKTOP, cachedDC);
|
|
}
|
|
|
|
DebugExitDWORD(FHGenerateFontWidthTable, functionRC);
|
|
return(functionRC);
|
|
}
|
|
|
|
//
|
|
// Define a macro to simplify the following code. This returns the first
|
|
// character in the name of the font at position i in the local table.
|
|
//
|
|
|
|
//
|
|
// nfFaceName is an array of CHARs, which are SIGNED. We need to treat them
|
|
// as UNSIGNED values, they are indeces from 0 to 255 into the font hash
|
|
// table.
|
|
//
|
|
#define LF_FIRSTCHAR(i) (BYTE)g_fhFonts->afhFonts[i].Details.nfFaceName[0]
|
|
|
|
//
|
|
// Name: FHSortAndIndexLocalFonts
|
|
//
|
|
// Purpose: Sorts local font table by font name and generates an index for
|
|
// quicker searching in the display driver.
|
|
//
|
|
// Returns: None.
|
|
//
|
|
// Params: None.
|
|
//
|
|
//
|
|
void FHSortAndIndexLocalFonts(void)
|
|
{
|
|
TSHR_UINT16 thisIndexEntry;
|
|
TSHR_UINT16 fontTablePos;
|
|
|
|
DebugEntry(FHSortAndIndexLocalFonts);
|
|
|
|
//
|
|
// Check there are actually some fonts to sort/index
|
|
//
|
|
if (0 == g_fhFonts->fhNumFonts)
|
|
{
|
|
WARNING_OUT(( "No fonts to sort/index"));
|
|
DC_QUIT;
|
|
}
|
|
|
|
//
|
|
// Use qsort to do the sort. We sort on the font name, ascending.
|
|
// Therefore we must use STRCMP and not lstrcmp. The latter sorts
|
|
// by 'word' method, where upper case sorts before lower case. But
|
|
// our NT driver has no access to a similar routine. And this code +
|
|
// driver code must be in ssync for the driver to successfully search
|
|
// the sorted font table.
|
|
//
|
|
|
|
FH_qsort(g_fhFonts->afhFonts, g_fhFonts->fhNumFonts, sizeof(LOCALFONT));
|
|
TRACE_OUT(( "Sorted local font list"));
|
|
|
|
//
|
|
// Now generate the index. Each element i in the g_fhFonts->afhFontIndex
|
|
// array must indicate the first entry in the local font table
|
|
// beginning with character i. If there are no fonts beginning with
|
|
// character i, then the element is set to USHRT_MAX (i.e. a large
|
|
// value).
|
|
//
|
|
|
|
//
|
|
// First clear the index table to unused entries.
|
|
//
|
|
for (thisIndexEntry = 0;
|
|
thisIndexEntry < FH_LOCAL_INDEX_SIZE;
|
|
thisIndexEntry++)
|
|
{
|
|
g_fhFonts->afhFontIndex[thisIndexEntry] = USHRT_MAX;
|
|
}
|
|
|
|
//
|
|
// Now fill in the useful information.
|
|
//
|
|
// This for loop steps through the index array, using the first
|
|
// character of the first font in the local table as its start point.
|
|
// Since the font table is alphabetically sorted, this will correspond
|
|
// to the first index entry that needs filling in.
|
|
//
|
|
// The terminating condition for this loop may seem a little odd, but
|
|
// works because fontTablePos will always reach a value of g_fhFonts->fhNumFonts
|
|
// before thisIndexEntry gets to the last index element.
|
|
//
|
|
fontTablePos = 0;
|
|
|
|
for (thisIndexEntry = LF_FIRSTCHAR(0);
|
|
fontTablePos < g_fhFonts->fhNumFonts;
|
|
thisIndexEntry++)
|
|
{
|
|
//
|
|
// Don't do anything until we get to the index element
|
|
// corresponding to the first character in the font pointed to by
|
|
// fontTablePos. (We'll be there straight away on the first pass)
|
|
//
|
|
if (thisIndexEntry == LF_FIRSTCHAR(fontTablePos))
|
|
{
|
|
//
|
|
// We've found the first font table entry starting with
|
|
// character thisIndexEntry, so enter it in the index.
|
|
//
|
|
g_fhFonts->afhFontIndex[thisIndexEntry] = fontTablePos;
|
|
|
|
//
|
|
// Now zip past the rest of the local font table entries that
|
|
// start with this character, also checking that we haven't got
|
|
// to the end of the font table.
|
|
//
|
|
// If the latter happens, it means we've finished and the check
|
|
// in the for statement will ensure that we exit the loop.
|
|
//
|
|
while ((LF_FIRSTCHAR(fontTablePos) == thisIndexEntry) &&
|
|
(fontTablePos < g_fhFonts->fhNumFonts))
|
|
{
|
|
fontTablePos++;
|
|
}
|
|
}
|
|
}
|
|
|
|
TRACE_OUT(( "Built local font table index"));
|
|
|
|
DC_EXIT_POINT:
|
|
DebugExitVOID(FHSortAndIndexLocalFonts);
|
|
}
|
|
|
|
|
|
|
|
|
|
//
|
|
// FHComp()
|
|
// This is a wrapper around strcmp(), which becomes an inline function in
|
|
// retail. It also handles the casting of the LPVOIDs.
|
|
//
|
|
//
|
|
// Compare item 1, item 2
|
|
//
|
|
int FHComp
|
|
(
|
|
LPVOID lpFont1,
|
|
LPVOID lpFont2
|
|
)
|
|
{
|
|
return(strcmp(((LPLOCALFONT)lpFont1)->Details.nfFaceName,
|
|
((LPLOCALFONT)lpFont2)->Details.nfFaceName));
|
|
}
|
|
|
|
|
|
//
|
|
// FH_qsort(base, num, wid) - quicksort function for sorting arrays
|
|
//
|
|
// Purpose:
|
|
// quicksort the array of elements
|
|
// side effects: sorts in place
|
|
//
|
|
// Entry:
|
|
// char *base = pointer to base of array
|
|
// unsigned num = number of elements in the array
|
|
// unsigned width = width in bytes of each array element
|
|
//
|
|
// Exit:
|
|
// returns void
|
|
//
|
|
// Exceptions:
|
|
//
|
|
|
|
|
|
|
|
|
|
// sort the array between lo and hi (inclusive)
|
|
|
|
void FH_qsort
|
|
(
|
|
LPVOID base,
|
|
UINT num,
|
|
UINT width
|
|
)
|
|
{
|
|
LPSTR lo;
|
|
LPSTR hi;
|
|
LPSTR mid;
|
|
LPSTR loguy;
|
|
LPSTR higuy;
|
|
UINT size;
|
|
char *lostk[30], *histk[30];
|
|
int stkptr; // stack for saving sub-array to be processed
|
|
|
|
// Note: the number of stack entries required is no more than
|
|
// 1 + log2(size), so 30 is sufficient for any array
|
|
|
|
ASSERT(width);
|
|
if (num < 2)
|
|
return; // nothing to do
|
|
|
|
stkptr = 0; // initialize stack
|
|
|
|
lo = (LPSTR)base;
|
|
hi = (LPSTR)base + width * (num-1); // initialize limits
|
|
|
|
// this entry point is for pseudo-recursion calling: setting
|
|
// lo and hi and jumping to here is like recursion, but stkptr is
|
|
// prserved, locals aren't, so we preserve stuff on the stack
|
|
recurse:
|
|
|
|
size = (UINT)(hi - lo) / width + 1; // number of el's to sort
|
|
|
|
// below a certain size, it is faster to use a O(n^2) sorting method
|
|
if (size <= CUTOFF)
|
|
{
|
|
shortsort(lo, hi, width);
|
|
}
|
|
else
|
|
{
|
|
// First we pick a partititioning element. The efficiency of the
|
|
// algorithm demands that we find one that is approximately the
|
|
// median of the values, but also that we select one fast. Using
|
|
// the first one produces bad performace if the array is already
|
|
// sorted, so we use the middle one, which would require a very
|
|
// weirdly arranged array for worst case performance. Testing shows
|
|
// that a median-of-three algorithm does not, in general, increase
|
|
// performance.
|
|
|
|
mid = lo + (size / 2) * width; // find middle element
|
|
swap(mid, lo, width); // swap it to beginning of array
|
|
|
|
// We now wish to partition the array into three pieces, one
|
|
// consisiting of elements <= partition element, one of elements
|
|
// equal to the parition element, and one of element >= to it. This
|
|
// is done below; comments indicate conditions established at every
|
|
// step.
|
|
|
|
loguy = lo;
|
|
higuy = hi + width;
|
|
|
|
// Note that higuy decreases and loguy increases on every iteration,
|
|
// so loop must terminate.
|
|
for (;;) {
|
|
// lo <= loguy < hi, lo < higuy <= hi + 1,
|
|
// A[i] <= A[lo] for lo <= i <= loguy,
|
|
// A[i] >= A[lo] for higuy <= i <= hi
|
|
|
|
do
|
|
{
|
|
loguy += width;
|
|
}
|
|
while ((loguy <= hi) && (FHComp(loguy, lo) <= 0));
|
|
|
|
// lo < loguy <= hi+1, A[i] <= A[lo] for lo <= i < loguy,
|
|
// either loguy > hi or A[loguy] > A[lo]
|
|
|
|
do
|
|
{
|
|
higuy -= width;
|
|
}
|
|
while ((higuy > lo) && (FHComp(higuy, lo) >= 0));
|
|
|
|
// lo-1 <= higuy <= hi, A[i] >= A[lo] for higuy < i <= hi,
|
|
// either higuy <= lo or A[higuy] < A[lo]
|
|
|
|
if (higuy < loguy)
|
|
break;
|
|
|
|
// if loguy > hi or higuy <= lo, then we would have exited, so
|
|
// A[loguy] > A[lo], A[higuy] < A[lo],
|
|
// loguy < hi, highy > lo
|
|
|
|
swap(loguy, higuy, width);
|
|
|
|
// A[loguy] < A[lo], A[higuy] > A[lo]; so condition at top
|
|
// of loop is re-established
|
|
}
|
|
|
|
// A[i] >= A[lo] for higuy < i <= hi,
|
|
// A[i] <= A[lo] for lo <= i < loguy,
|
|
// higuy < loguy, lo <= higuy <= hi
|
|
// implying:
|
|
// A[i] >= A[lo] for loguy <= i <= hi,
|
|
// A[i] <= A[lo] for lo <= i <= higuy,
|
|
// A[i] = A[lo] for higuy < i < loguy
|
|
|
|
swap(lo, higuy, width); // put partition element in place
|
|
|
|
// OK, now we have the following:
|
|
// A[i] >= A[higuy] for loguy <= i <= hi,
|
|
// A[i] <= A[higuy] for lo <= i < higuy
|
|
// A[i] = A[lo] for higuy <= i < loguy
|
|
|
|
// We've finished the partition, now we want to sort the subarrays
|
|
// [lo, higuy-1] and [loguy, hi].
|
|
// We do the smaller one first to minimize stack usage.
|
|
// We only sort arrays of length 2 or more.
|
|
|
|
if ( higuy - 1 - lo >= hi - loguy ) {
|
|
if (lo + width < higuy) {
|
|
lostk[stkptr] = lo;
|
|
histk[stkptr] = higuy - width;
|
|
++stkptr;
|
|
} // save big recursion for later
|
|
|
|
if (loguy < hi) {
|
|
lo = loguy;
|
|
goto recurse; // do small recursion
|
|
}
|
|
}
|
|
else {
|
|
if (loguy < hi) {
|
|
lostk[stkptr] = loguy;
|
|
histk[stkptr] = hi;
|
|
++stkptr; // save big recursion for later
|
|
}
|
|
|
|
if (lo + width < higuy) {
|
|
hi = higuy - width;
|
|
goto recurse; // do small recursion
|
|
}
|
|
}
|
|
}
|
|
|
|
// We have sorted the array, except for any pending sorts on the stack.
|
|
// Check if there are any, and do them.
|
|
|
|
--stkptr;
|
|
if (stkptr >= 0) {
|
|
lo = lostk[stkptr];
|
|
hi = histk[stkptr];
|
|
goto recurse; // pop subarray from stack
|
|
}
|
|
else
|
|
return; // all subarrays done
|
|
}
|
|
|
|
|
|
//
|
|
// shortsort(hi, lo, width) - insertion sort for sorting short arrays
|
|
//
|
|
// Purpose:
|
|
// sorts the sub-array of elements between lo and hi (inclusive)
|
|
// side effects: sorts in place
|
|
// assumes that lo < hi
|
|
//
|
|
// Entry:
|
|
// char *lo = pointer to low element to sort
|
|
// char *hi = pointer to high element to sort
|
|
// unsigned width = width in bytes of each array element
|
|
//
|
|
// Exit:
|
|
// returns void
|
|
//
|
|
// Exceptions:
|
|
//
|
|
|
|
void shortsort
|
|
(
|
|
char *lo,
|
|
char *hi,
|
|
unsigned int width
|
|
)
|
|
{
|
|
char *p, *max;
|
|
|
|
// Note: in assertions below, i and j are alway inside original bound of
|
|
// array to sort.
|
|
|
|
while (hi > lo) {
|
|
// A[i] <= A[j] for i <= j, j > hi
|
|
max = lo;
|
|
for (p = lo+width; p <= hi; p += width) {
|
|
// A[i] <= A[max] for lo <= i < p
|
|
if (FHComp(p, max) > 0)
|
|
{
|
|
max = p;
|
|
}
|
|
// A[i] <= A[max] for lo <= i <= p
|
|
}
|
|
|
|
// A[i] <= A[max] for lo <= i <= hi
|
|
|
|
swap(max, hi, width);
|
|
|
|
// A[i] <= A[hi] for i <= hi, so A[i] <= A[j] for i <= j, j >= hi
|
|
|
|
hi -= width;
|
|
|
|
// A[i] <= A[j] for i <= j, j > hi, loop top condition established
|
|
}
|
|
// A[i] <= A[j] for i <= j, j > lo, which implies A[i] <= A[j] for i < j,
|
|
// so array is sorted
|
|
}
|
|
|
|
|
|
//
|
|
// swap(a, b, width) - swap two elements
|
|
//
|
|
// Purpose:
|
|
// swaps the two array elements of size width
|
|
//
|
|
// Entry:
|
|
// char *a, *b = pointer to two elements to swap
|
|
// unsigned width = width in bytes of each array element
|
|
//
|
|
// Exit:
|
|
// returns void
|
|
//
|
|
// Exceptions:
|
|
//
|
|
|
|
void swap (
|
|
char *a,
|
|
char *b,
|
|
unsigned int width
|
|
)
|
|
{
|
|
char tmp;
|
|
|
|
if ( a != b )
|
|
// Do the swap one character at a time to avoid potential alignment
|
|
// problems.
|
|
while ( width-- ) {
|
|
tmp = *a;
|
|
*a++ = *b;
|
|
*b++ = tmp;
|
|
}
|
|
}
|
|
|
|
|
|
|