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misc.cpp
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/*++
Copyright (c) Microsoft Corporation.
Licensed under the MIT license.
Module Name:
misc.c
Abstract:
This file implements the NT console server font routines.
Author:
Therese Stowell (thereses) 22-Jan-1991
Revision History:
--*/
#include "precomp.h"
#include <strsafe.h>
#include <ShellScalingAPI.h>
#pragma hdrstop
#if DBG
ULONG gDebugFlag = 0;
#endif
#define MAX_FONT_INFO_ALLOC (ULONG_MAX / sizeof(FONT_INFO))
#define FE_ABANDONFONT 0
#define FE_SKIPFONT 1
#define FE_FONTOK 2
#define TERMINAL_FACENAME L"Terminal"
/*
* TTPoints -- Initial font pixel heights for TT fonts
*/
SHORT TTPoints[] = {
5,
6,
7,
8,
10,
12,
14,
16,
18,
20,
24,
28,
36,
72
};
/*
* TTPointsDbcs -- Initial font pixel heights for TT fonts of DBCS.
* So, This list except odd point size because font width is (SBCS:DBCS != 1:2).
*/
SHORT TTPointsDbcs[] = {
6,
8,
10,
12,
14,
16,
18,
20,
24,
28,
36,
72
};
typedef struct _FONTENUMDATA
{
HDC hDC;
BOOL bFindFaces;
ULONG ulFE;
__field_ecount_opt(nTTPoints) PSHORT pTTPoints;
UINT nTTPoints;
} FONTENUMDATA, *PFONTENUMDATA;
PFACENODE
AddFaceNode(
__in_ecount(LF_FACESIZE) LPCWSTR ptsz)
{
PFACENODE pNew, *ppTmp;
size_t cch;
/*
* Is it already here?
*/
for (ppTmp = &gpFaceNames; *ppTmp; ppTmp = &((*ppTmp)->pNext))
{
if (0 == lstrcmp(((*ppTmp)->atch), ptsz))
{
// already there !
return *ppTmp;
}
}
cch = wcslen(ptsz);
pNew = (PFACENODE)HeapAlloc(GetProcessHeap(),
0,
sizeof(FACENODE) + ((cch + 1) * sizeof(WCHAR)));
if (pNew == nullptr)
{
return nullptr;
}
pNew->pNext = nullptr;
pNew->dwFlag = 0;
StringCchCopy(pNew->atch, cch + 1, ptsz);
*ppTmp = pNew;
return pNew;
}
VOID DestroyFaceNodes(VOID)
{
PFACENODE pNext, pTmp;
pTmp = gpFaceNames;
while (pTmp != nullptr)
{
pNext = pTmp->pNext;
HeapFree(GetProcessHeap(), 0, pTmp);
pTmp = pNext;
}
gpFaceNames = nullptr;
}
// TODO: Refactor into lib for use by both conhost and console.dll
// see http://osgvsowi/677457
UINT GetCurrentDPI(const HWND hWnd, const BOOL fReturnYDPI)
{
UINT dpiX = 0;
UINT dpiY = 0;
GetDpiForMonitor(MonitorFromWindow(hWnd, MONITOR_DEFAULTTONEAREST),
MDT_EFFECTIVE_DPI,
&dpiX,
&dpiY);
return (fReturnYDPI) ? dpiY : dpiX;
}
int GetDPIScaledPixelSize(const int px, const int iCurrentDPI)
{
return MulDiv(px, iCurrentDPI, 96);
}
int GetDPIYScaledPixelSize(const HWND hWnd, const int px)
{
return GetDPIScaledPixelSize(px, GetCurrentDPI(hWnd, TRUE));
}
int GetDPIXScaledPixelSize(const HWND hWnd, const int px)
{
return GetDPIScaledPixelSize(px, GetCurrentDPI(hWnd, FALSE));
}
// If we're running the V2 console, enumerate all of our TrueType fonts and rescale them as appropriate to match the
// current monitor's DPI. This function gets triggered when either the DPI of a single monitor changes, or when the
// properties dialog is moved between monitors of differing DPIs.
void RecreateFontHandles(const HWND hWnd)
{
if (gpStateInfo->fIsV2Console)
{
for (UINT iCurrFont = 0; iCurrFont < NumberOfFonts; iCurrFont++)
{
// if the current font is a TrueType font
if (TM_IS_TT_FONT(FontInfo[iCurrFont].Family))
{
LOGFONT lf = { 0 };
lf.lfWidth = GetDPIXScaledPixelSize(hWnd, FontInfo[iCurrFont].Size.X);
lf.lfHeight = GetDPIYScaledPixelSize(hWnd, FontInfo[iCurrFont].Size.Y);
lf.lfWeight = FontInfo[iCurrFont].Weight;
lf.lfCharSet = FontInfo[iCurrFont].tmCharSet;
// NOTE: not using what GDI gave us because some fonts don't quite roundtrip (e.g. MS Gothic and VL Gothic)
lf.lfPitchAndFamily = (FIXED_PITCH | FF_MODERN);
if (SUCCEEDED(StringCchCopy(lf.lfFaceName, ARRAYSIZE(lf.lfFaceName), FontInfo[iCurrFont].FaceName)))
{
auto hRescaledFont = CreateFontIndirect(&lf);
if (hRescaledFont != nullptr)
{
// Only replace the existing font if we've got a replacement. The worst that can happen is that
// we fail to create our scaled font, so the user sees an incorrectly-scaled font preview.
DeleteObject(FontInfo[iCurrFont].hFont);
FontInfo[iCurrFont].hFont = hRescaledFont;
}
}
}
}
}
}
// Routine Description:
// - Add the font described by the LOGFONT structure to the font table if
// it's not already there.
int AddFont(
ENUMLOGFONT* pelf,
NEWTEXTMETRIC* pntm,
int nFontType,
HDC hDC,
PFACENODE pFN)
{
HFONT hFont;
TEXTMETRIC tm;
ULONG nFont;
COORD SizeToShow, SizeActual, SizeWant, SizeOriginal;
BYTE tmFamily;
SIZE Size;
auto fCreatingBoldFont = FALSE;
auto ptszFace = pelf->elfLogFont.lfFaceName;
/* get font info */
SizeWant.X = (SHORT)pelf->elfLogFont.lfWidth;
SizeWant.Y = (SHORT)pelf->elfLogFont.lfHeight;
/* save original size request so that we can use it unmodified when doing DPI calculations */
SizeOriginal.X = (SHORT)pelf->elfLogFont.lfWidth;
SizeOriginal.Y = (SHORT)pelf->elfLogFont.lfHeight;
CreateBoldFont:
pelf->elfLogFont.lfQuality = DEFAULT_QUALITY;
hFont = CreateFontIndirect(&pelf->elfLogFont);
if (!hFont)
{
DBGFONTS((" REJECT font (can't create)\n"));
return FE_SKIPFONT; // same font in other sizes may still be suitable
}
DBGFONTS2((" hFont = %p\n", hFont));
SelectObject(hDC, hFont);
GetTextMetrics(hDC, &tm);
GetTextExtentPoint32(hDC, TEXT("0"), 1, &Size);
SizeActual.X = (SHORT)Size.cx;
SizeActual.Y = (SHORT)(tm.tmHeight + tm.tmExternalLeading);
DBGFONTS2((" actual size %d,%d\n", SizeActual.X, SizeActual.Y));
tmFamily = tm.tmPitchAndFamily;
if (TM_IS_TT_FONT(tmFamily) && (SizeWant.Y >= 0))
{
SizeToShow = SizeWant;
if (SizeWant.X == 0)
{
// Asking for zero width height gets a default aspect-ratio width.
// It's better to show that width rather than 0.
SizeToShow.X = SizeActual.X;
}
}
else
{
SizeToShow = SizeActual;
}
DBGFONTS2((" SizeToShow = (%d,%d), SizeActual = (%d,%d)\n",
SizeToShow.X,
SizeToShow.Y,
SizeActual.X,
SizeActual.Y));
/*
* NOW, determine whether this font entry has already been cached
* LATER : it may be possible to do this before creating the font, if
* we can trust the dimensions & other info from pntm.
* Sort by size:
* 1) By pixelheight (negative Y values)
* 2) By height (as shown)
* 3) By width (as shown)
*/
for (nFont = 0; nFont < NumberOfFonts; ++nFont)
{
COORD SizeShown;
if (FontInfo[nFont].hFont == nullptr)
{
DBGFONTS(("! Font %x has a NULL hFont\n", nFont));
continue;
}
if (FontInfo[nFont].SizeWant.X > 0)
{
SizeShown.X = FontInfo[nFont].SizeWant.X;
}
else
{
SizeShown.X = FontInfo[nFont].Size.X;
}
if (FontInfo[nFont].SizeWant.Y > 0)
{
// This is a font specified by cell height.
SizeShown.Y = FontInfo[nFont].SizeWant.Y;
}
else
{
SizeShown.Y = FontInfo[nFont].Size.Y;
if (FontInfo[nFont].SizeWant.Y < 0)
{
// This is a TT font specified by character height.
if (SizeWant.Y < 0 && SizeWant.Y > FontInfo[nFont].SizeWant.Y)
{
// Requested pixelheight is smaller than this one.
DBGFONTS(("INSERT %d pt at %x, before %d pt\n",
-SizeWant.Y,
nFont,
-FontInfo[nFont].SizeWant.Y));
break;
}
}
}
// Note that we're relying on pntm->tmWeight below because some fonts (e.g. Iosevka Extralight) show up as bold
// via GetTextMetrics. pntm->tmWeight doesn't have this issue. However, on the second pass through (see
// :CreateBoldFont) we should use what's in tm.tmWeight
if (SIZE_EQUAL(SizeShown, SizeToShow) &&
FontInfo[nFont].Family == tmFamily &&
FontInfo[nFont].Weight == ((fCreatingBoldFont) ? tm.tmWeight : pntm->tmWeight) &&
0 == lstrcmp(FontInfo[nFont].FaceName, ptszFace))
{
/*
* Already have this font
*/
DBGFONTS2((" Already have the font\n"));
DeleteObject(hFont);
return FE_FONTOK;
}
if ((SizeToShow.Y < SizeShown.Y) ||
(SizeToShow.Y == SizeShown.Y && SizeToShow.X < SizeShown.X))
{
/*
* This new font is smaller than nFont
*/
DBGFONTS(("INSERT at %x, SizeToShow = (%d,%d)\n", nFont, SizeToShow.X, SizeToShow.Y));
break;
}
}
/*
* If we have to grow our font table, do it.
*/
if (NumberOfFonts == FontInfoLength)
{
PFONT_INFO Temp = nullptr;
FontInfoLength += FONT_INCREMENT;
if (FontInfoLength < MAX_FONT_INFO_ALLOC)
{
Temp = (PFONT_INFO)HeapReAlloc(GetProcessHeap(),
0,
FontInfo,
sizeof(FONT_INFO) * FontInfoLength);
}
if (Temp == nullptr)
{
FontInfoLength -= FONT_INCREMENT;
return FE_ABANDONFONT; // no point enumerating more - no memory!
}
FontInfo = Temp;
}
/*
* The font we are adding should be inserted into the list, if it is
* smaller than the last one.
*/
if (nFont < NumberOfFonts)
{
RtlMoveMemory(&FontInfo[nFont + 1],
&FontInfo[nFont],
sizeof(FONT_INFO) * (NumberOfFonts - nFont));
}
/*
* If we're adding a truetype font for the V2 console, secretly swap out the current hFont with one that's scaled
* appropriately for DPI
*/
if (nFontType == TRUETYPE_FONTTYPE && gpStateInfo->fIsV2Console)
{
DeleteObject(hFont);
pelf->elfLogFont.lfWidth = GetDPIXScaledPixelSize(gpStateInfo->hWnd, SizeOriginal.X);
pelf->elfLogFont.lfHeight = GetDPIYScaledPixelSize(gpStateInfo->hWnd, SizeOriginal.Y);
hFont = CreateFontIndirect(&pelf->elfLogFont);
if (!hFont)
{
return FE_SKIPFONT;
}
}
/*
* Store the font info
*/
FontInfo[nFont].hFont = hFont;
FontInfo[nFont].Family = tmFamily;
FontInfo[nFont].Size = SizeActual;
if (TM_IS_TT_FONT(tmFamily))
{
FontInfo[nFont].SizeWant = SizeWant;
}
else
{
FontInfo[nFont].SizeWant.X = 0;
FontInfo[nFont].SizeWant.Y = 0;
}
FontInfo[nFont].Weight = tm.tmWeight;
FontInfo[nFont].FaceName = pFN->atch;
FontInfo[nFont].tmCharSet = tm.tmCharSet;
++NumberOfFonts;
/*
* If this is a true type font, create a bold version too.
*/
if (nFontType == TRUETYPE_FONTTYPE && !IS_BOLD(FontInfo[nFont].Weight))
{
pelf->elfLogFont.lfWeight = FW_BOLD;
pelf->elfLogFont.lfWidth = SizeOriginal.X;
pelf->elfLogFont.lfHeight = SizeOriginal.Y;
fCreatingBoldFont = TRUE;
goto CreateBoldFont;
}
return FE_FONTOK; // and continue enumeration
}
VOID InitializeFonts(VOID)
{
LOG_IF_FAILED(EnumerateFonts(EF_DEFFACE)); // Just the Default font
}
VOID DestroyFonts(VOID)
{
ULONG FontIndex;
if (FontInfo != nullptr)
{
for (FontIndex = 0; FontIndex < NumberOfFonts; FontIndex++)
{
DeleteObject(FontInfo[FontIndex].hFont);
}
HeapFree(GetProcessHeap(), 0, FontInfo);
FontInfo = nullptr;
NumberOfFonts = 0;
}
DestroyFaceNodes();
}
/*
* Returns bit combination
* FE_ABANDONFONT - do not continue enumerating this font
* FE_SKIPFONT - skip this font but keep enumerating
* FE_FONTOK - font was created and added to cache or already there
*
* Is called exactly once by GDI for each font in the system. This
* routine is used to store the FONT_INFO structure.
*/
int CALLBACK FontEnumForV2Console(ENUMLOGFONT* pelf, NEWTEXTMETRIC* pntm, int nFontType, LPARAM lParam)
{
FAIL_FAST_IF(!(ShouldAllowAllMonoTTFonts()));
UINT i;
LPCTSTR ptszFace = pelf->elfLogFont.lfFaceName;
PFACENODE pFN;
auto pfed = (PFONTENUMDATA)lParam;
DBGFONTS((" FontEnum \"%ls\" (%d,%d) weight 0x%lx(%d) %x -- %s\n",
ptszFace,
pelf->elfLogFont.lfWidth,
pelf->elfLogFont.lfHeight,
pelf->elfLogFont.lfWeight,
pelf->elfLogFont.lfWeight,
pelf->elfLogFont.lfCharSet,
pfed->bFindFaces ? "Finding Faces" : "Creating Fonts"));
// reject non-monospaced fonts
if (!(pelf->elfLogFont.lfPitchAndFamily & FIXED_PITCH))
{
return pfed->bFindFaces ? FE_SKIPFONT : FE_ABANDONFONT;
}
// reject non-modern or italic TT fonts
if ((nFontType == TRUETYPE_FONTTYPE) &&
(((pelf->elfLogFont.lfPitchAndFamily & 0xf0) != FF_MODERN) ||
pelf->elfLogFont.lfItalic))
{
DBGFONTS((" REJECT face (TT but not FF_MODERN)\n"));
return pfed->bFindFaces ? FE_SKIPFONT : FE_ABANDONFONT;
}
// reject non-TT fonts that aren't OEM
if ((nFontType != TRUETYPE_FONTTYPE) && !IS_DBCS_OR_OEM_CHARSET(pelf->elfLogFont.lfCharSet))
{
DBGFONTS((" REJECT face (not TT nor OEM)\n"));
return FE_SKIPFONT;
}
// reject fonts that are vertical
if (ptszFace[0] == TEXT('@'))
{
DBGFONTS((" REJECT face (not TT and TATEGAKI)\n"));
return pfed->bFindFaces ? FE_SKIPFONT : FE_ABANDONFONT;
}
// reject non-TT fonts that aren't terminal
if (g_fEastAsianSystem && (nFontType != TRUETYPE_FONTTYPE) && (0 != lstrcmp(ptszFace, TERMINAL_FACENAME)))
{
DBGFONTS((" REJECT face (not TT nor Terminal)\n"));
return pfed->bFindFaces ? FE_SKIPFONT : FE_ABANDONFONT;
}
// reject East Asian TT fonts that aren't East Asian charset.
if (g_fEastAsianSystem && (nFontType == TRUETYPE_FONTTYPE) && !IS_ANY_DBCS_CHARSET(pelf->elfLogFont.lfCharSet))
{
DBGFONTS((" REJECT face (East Asian charset, but not East Asian TT)\n"));
return FE_SKIPFONT; // should be enumerate next charset.
}
// reject East Asian TT fonts on non-East Asian systems
if (!g_fEastAsianSystem && (nFontType == TRUETYPE_FONTTYPE) && IS_ANY_DBCS_CHARSET(pelf->elfLogFont.lfCharSet))
{
DBGFONTS((" REJECT face (East Asian TT and not East Asian charset)\n"));
return FE_SKIPFONT; // should be enumerate next charset.
}
/*
* Add or find the facename
*/
pFN = AddFaceNode(ptszFace);
if (pFN == nullptr)
{
return FE_ABANDONFONT;
}
if (pfed->bFindFaces)
{
DWORD dwFontType;
if (nFontType == TRUETYPE_FONTTYPE)
{
DBGFONTS(("NEW TT FACE %ls\n", ptszFace));
dwFontType = EF_TTFONT;
}
else if (nFontType == RASTER_FONTTYPE)
{
DBGFONTS(("NEW OEM FACE %ls\n", ptszFace));
dwFontType = EF_OEMFONT;
}
else
{
dwFontType = 0;
}
pFN->dwFlag |= dwFontType | EF_NEW;
if (IS_ANY_DBCS_CHARSET(pelf->elfLogFont.lfCharSet))
{
pFN->dwFlag |= EF_DBCSFONT;
}
return FE_SKIPFONT;
}
/*
* Add the font to the table. If this is a true type font, add the
* sizes from the array. Otherwise, just add the size we got.
*/
if (nFontType & TRUETYPE_FONTTYPE)
{
for (i = 0; i < pfed->nTTPoints; i++)
{
pelf->elfLogFont.lfHeight = pfed->pTTPoints[i];
pelf->elfLogFont.lfWidth = 0;
pelf->elfLogFont.lfWeight = pntm->tmWeight;
pfed->ulFE |= AddFont(pelf, pntm, nFontType, pfed->hDC, pFN);
if (pfed->ulFE == FE_ABANDONFONT)
{
return FE_ABANDONFONT;
}
}
}
else
{
pfed->ulFE |= AddFont(pelf, pntm, nFontType, pfed->hDC, pFN);
if (pfed->ulFE == FE_ABANDONFONT)
{
return FE_ABANDONFONT;
}
}
return FE_FONTOK; // and continue enumeration
}
/*
* Returns bit combination
* FE_ABANDONFONT - do not continue enumerating this font
* FE_SKIPFONT - skip this font but keep enumerating
* FE_FONTOK - font was created and added to cache or already there
*
* Is called exactly once by GDI for each font in the system. This
* routine is used to store the FONT_INFO structure.
*/
int
CALLBACK
FontEnum(
ENUMLOGFONT* pelf,
NEWTEXTMETRIC* pntm,
int nFontType,
LPARAM lParam)
{
UINT i;
LPCTSTR ptszFace = pelf->elfLogFont.lfFaceName;
PFACENODE pFN;
auto pfed = (PFONTENUMDATA)lParam;
DBGFONTS((" FontEnum \"%ls\" (%d,%d) weight 0x%lx(%d) %x -- %s\n",
ptszFace,
pelf->elfLogFont.lfWidth,
pelf->elfLogFont.lfHeight,
pelf->elfLogFont.lfWeight,
pelf->elfLogFont.lfWeight,
pelf->elfLogFont.lfCharSet,
pfed->bFindFaces ? "Finding Faces" : "Creating Fonts"));
//
// reject variable width and italic fonts, also tt fonts with neg ac
//
if (
!(pelf->elfLogFont.lfPitchAndFamily & FIXED_PITCH) ||
(pelf->elfLogFont.lfItalic) ||
!(pntm->ntmFlags & NTM_NONNEGATIVE_AC))
{
if (!IsAvailableTTFont(ptszFace))
{
DBGFONTS((" REJECT face (dbcs, variable pitch, italic, or neg a&c)\n"));
return pfed->bFindFaces ? FE_SKIPFONT : FE_ABANDONFONT;
}
}
/*
* reject TT fonts for whom family is not modern, that is do not use
* FF_DONTCARE // may be surprised unpleasantly
* FF_DECORATIVE // likely to be symbol fonts
* FF_SCRIPT // cursive, inappropriate for console
* FF_SWISS OR FF_ROMAN // variable pitch
*/
if ((nFontType == TRUETYPE_FONTTYPE) &&
((pelf->elfLogFont.lfPitchAndFamily & 0xf0) != FF_MODERN))
{
DBGFONTS((" REJECT face (TT but not FF_MODERN)\n"));
return pfed->bFindFaces ? FE_SKIPFONT : FE_ABANDONFONT;
}
/*
* reject non-TT fonts that aren't OEM
*/
if ((nFontType != TRUETYPE_FONTTYPE) &&
(!g_fEastAsianSystem || !IS_ANY_DBCS_CHARSET(pelf->elfLogFont.lfCharSet)) &&
(pelf->elfLogFont.lfCharSet != OEM_CHARSET))
{
DBGFONTS((" REJECT face (not TT nor OEM)\n"));
return FE_SKIPFONT;
}
/*
* reject non-TT fonts that are vertical font
*/
if ((nFontType != TRUETYPE_FONTTYPE) &&
(ptszFace[0] == TEXT('@')))
{
DBGFONTS((" REJECT face (not TT and TATEGAKI)\n"));
return pfed->bFindFaces ? FE_SKIPFONT : FE_ABANDONFONT;
}
/*
* reject non-TT fonts that aren't Terminal
*/
if (g_fEastAsianSystem && (nFontType != TRUETYPE_FONTTYPE) &&
(0 != lstrcmp(ptszFace, TERMINAL_FACENAME)))
{
DBGFONTS((" REJECT face (not TT nor Terminal)\n"));
return pfed->bFindFaces ? FE_SKIPFONT : FE_ABANDONFONT;
}
/*
* reject East Asian TT fonts that aren't East Asian charset.
*/
if (IsAvailableTTFont(ptszFace) &&
!IS_ANY_DBCS_CHARSET(pelf->elfLogFont.lfCharSet) &&
!IsAvailableTTFontCP(ptszFace, 0))
{
DBGFONTS((" REJECT face (East Asian TT and not East Asian charset)\n"));
return FE_SKIPFONT; // should be enumerate next charset.
}
/*
* Add or find the facename
*/
pFN = AddFaceNode(ptszFace);
if (pFN == nullptr)
{
return FE_ABANDONFONT;
}
if (pfed->bFindFaces)
{
DWORD dwFontType;
if (nFontType == TRUETYPE_FONTTYPE)
{
DBGFONTS(("NEW TT FACE %ls\n", ptszFace));
dwFontType = EF_TTFONT;
}
else if (nFontType == RASTER_FONTTYPE)
{
DBGFONTS(("NEW OEM FACE %ls\n", ptszFace));
dwFontType = EF_OEMFONT;
}
else
{
dwFontType = 0;
}
pFN->dwFlag |= dwFontType | EF_NEW;
if (IS_ANY_DBCS_CHARSET(pelf->elfLogFont.lfCharSet))
{
pFN->dwFlag |= EF_DBCSFONT;
}
return FE_SKIPFONT;
}
if (IS_BOLD(pelf->elfLogFont.lfWeight))
{
DBGFONTS2((" A bold font (weight %d)\n", pelf->elfLogFont.lfWeight));
// return FE_SKIPFONT;
}
/*
* Add the font to the table. If this is a true type font, add the
* sizes from the array. Otherwise, just add the size we got.
*/
if (nFontType & TRUETYPE_FONTTYPE)
{
for (i = 0; i < pfed->nTTPoints; i++)
{
pelf->elfLogFont.lfHeight = pfed->pTTPoints[i];
pelf->elfLogFont.lfWidth = 0;
pelf->elfLogFont.lfWeight = 400;
pfed->ulFE |= AddFont(pelf, pntm, nFontType, pfed->hDC, pFN);
if (pfed->ulFE == FE_ABANDONFONT)
{
return FE_ABANDONFONT;
}
}
}
else
{
pfed->ulFE |= AddFont(pelf, pntm, nFontType, pfed->hDC, pFN);
if (pfed->ulFE == FE_ABANDONFONT)
{
return FE_ABANDONFONT;
}
}
return FE_FONTOK; // and continue enumeration
}
BOOL DoFontEnum(
__in_opt HDC hDC,
__in_ecount_opt(LF_FACESIZE) LPTSTR ptszFace,
__in_ecount_opt(nTTPoints) PSHORT pTTPoints,
__in UINT nTTPoints)
{
auto bDeleteDC = FALSE;
FONTENUMDATA fed;
LOGFONT LogFont;
DBGFONTS(("DoFontEnum \"%ls\"\n", ptszFace));
if (hDC == nullptr)
{
hDC = CreateCompatibleDC(nullptr);
bDeleteDC = TRUE;
}
fed.hDC = hDC;
fed.bFindFaces = (ptszFace == nullptr);
fed.ulFE = 0;
fed.pTTPoints = pTTPoints;
fed.nTTPoints = nTTPoints;
RtlZeroMemory(&LogFont, sizeof(LOGFONT));
LogFont.lfCharSet = DEFAULT_CHARSET;
if (ptszFace != nullptr)
{
StringCchCopy(LogFont.lfFaceName, LF_FACESIZE, ptszFace);
if (NumberOfFonts == 0 && // We've yet to enumerate fonts
g_fEastAsianSystem && // And we're currently using a CJK codepage
!IS_ANY_DBCS_CHARSET(CodePageToCharSet(OEMCP)) && // But the system codepage *isn't* CJK
0 == lstrcmp(ptszFace, TERMINAL_FACENAME))
{ // and we're looking at the raster font
// In this specific scenario, the raster font will only be enumerated if we ask for OEM_CHARSET rather than
// a CJK charset
LogFont.lfCharSet = OEM_CHARSET;
}
}
/*
* EnumFontFamiliesEx function enumerates one font in every face in every
* character set.
*/
EnumFontFamiliesEx(hDC, &LogFont, (FONTENUMPROC)((ShouldAllowAllMonoTTFonts()) ? FontEnumForV2Console : FontEnum), (LPARAM)&fed, 0);
if (bDeleteDC)
{
DeleteDC(hDC);
}
return (fed.ulFE & FE_FONTOK) != 0;
}
VOID RemoveFace(__in_ecount(LF_FACESIZE) LPCTSTR ptszFace)
{
DWORD i;
auto nToRemove = 0;
DBGFONTS(("RemoveFace %ls\n", ptszFace));
//
// Delete & Remove fonts with Face Name == ptszFace
//
for (i = 0; i < NumberOfFonts; i++)
{
if (0 == lstrcmp(FontInfo[i].FaceName, ptszFace))
{
auto bDeleted = DeleteObject(FontInfo[i].hFont);
DBGFONTS(("RemoveFace: hFont %p was %sdeleted\n",
FontInfo[i].hFont,
bDeleted ? "" : "NOT "));
bDeleted; // to fix x86 build complaining
FontInfo[i].hFont = nullptr;
nToRemove++;
}
else if (nToRemove > 0)
{
/*
* Shuffle from FontInfo[i] down nToRemove slots.
*/
RtlMoveMemory(&FontInfo[i - nToRemove],
&FontInfo[i],
sizeof(FONT_INFO) * (NumberOfFonts - i));
NumberOfFonts -= nToRemove;
i -= nToRemove;
nToRemove = 0;
}
}
NumberOfFonts -= nToRemove;
}
// Given a desired SHORT size, search pTTPoints to determine if size is in the list.
static bool IsSizePresentInList(const __in SHORT sSizeDesired, __in_ecount(nTTPoints) PSHORT pTTPoints, __in UINT nTTPoints)
{
auto fSizePresent = false;
for (UINT i = 0; i < nTTPoints; i++)
{
if (pTTPoints[i] == sSizeDesired)
{
fSizePresent = true;
break;
}
}
return fSizePresent;
}
// Given a face name, determine if the size provided is custom (i.e. not on the hardcoded list of sizes). Note that the
// list of sizes we use varies depending on the codepage being used
bool IsFontSizeCustom(__in PCWSTR pszFaceName, const __in SHORT sSize)
{
bool fUsingCustomFontSize;
if (g_fEastAsianSystem && !IsAvailableTTFontCP(pszFaceName, 0))
{
fUsingCustomFontSize = !IsSizePresentInList(sSize, TTPointsDbcs, ARRAYSIZE(TTPointsDbcs));
}
else
{
fUsingCustomFontSize = !IsSizePresentInList(sSize, TTPoints, ARRAYSIZE(TTPoints));
}
return fUsingCustomFontSize;
}
// Determines if the currently-selected font is using a custom size
static bool IsCurrentFontSizeCustom()
{
return IsFontSizeCustom(gpStateInfo->FaceName, gpStateInfo->FontSize.Y);
}
// Given a size, iterate through all TT fonts and load them in the provided size (only used for custom (non-hardcoded)
// font sizes)
void CreateSizeForAllTTFonts(const __in SHORT sSize)
{
auto hDC = CreateCompatibleDC(nullptr);
// for each font face
for (auto pFN = gpFaceNames; pFN; pFN = pFN->pNext)
{
if (pFN->dwFlag & EF_TTFONT)
{
// if it's a TT font, load the supplied size
DoFontEnum(hDC, pFN->atch, (PSHORT)&sSize, 1);
}
}
}
[[nodiscard]] NTSTATUS
EnumerateFonts(
DWORD Flags)
{
TEXTMETRIC tm;
HDC hDC;
PFACENODE pFN;
DWORD FontIndex;
DWORD dwFontType = 0;
DBGFONTS(("EnumerateFonts %lx\n", Flags));
dwFontType = (EF_TTFONT | EF_OEMFONT | EF_DEFFACE) & Flags;
if (FontInfo == nullptr)
{
//
// allocate memory for the font array
//
NumberOfFonts = 0;
FontInfo = (PFONT_INFO)HeapAlloc(GetProcessHeap(), 0, sizeof(FONT_INFO) * INITIAL_FONTS);
if (FontInfo == nullptr)
{
return STATUS_NO_MEMORY;
}
FontInfoLength = INITIAL_FONTS;
}
hDC = CreateCompatibleDC(nullptr);
if (Flags & EF_DEFFACE)
{
SelectObject(hDC, GetStockObject(OEM_FIXED_FONT));
GetTextMetrics(hDC, &tm);
GetTextFace(hDC, LF_FACESIZE, DefaultFaceName);
DefaultFontSize.X = (SHORT)(tm.tmMaxCharWidth);
DefaultFontSize.Y = (SHORT)(tm.tmHeight + tm.tmExternalLeading);
DefaultFontFamily = tm.tmPitchAndFamily;
if (IS_ANY_DBCS_CHARSET(tm.tmCharSet))
{
DefaultFontSize.X /= 2;
}
DBGFONTS(("Default (OEM) Font %ls (%d,%d) CharSet 0x%02X\n", DefaultFaceName, DefaultFontSize.X, DefaultFontSize.Y, tm.tmCharSet));
// Make sure we are going to enumerate the OEM face.
pFN = AddFaceNode(DefaultFaceName);
if (pFN != nullptr)
{
pFN->dwFlag |= EF_DEFFACE | EF_OEMFONT;
}
}
if (gbEnumerateFaces)
{
/*
* Set the EF_OLD bit and clear the EF_NEW bit
* for all previously available faces
*/
for (pFN = gpFaceNames; pFN; pFN = pFN->pNext)
{
pFN->dwFlag |= EF_OLD;
pFN->dwFlag &= ~EF_NEW;
}
//
// Use DoFontEnum to get the names of all the suitable Faces
// All facenames found will be put in gpFaceNames with
// the EF_NEW bit set.
//
DoFontEnum(hDC, nullptr, TTPoints, 1);
gbEnumerateFaces = FALSE;
}
// Use DoFontEnum to get all fonts from the system. Our FontEnum