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gdiplus: Fetch font family metrics from truetype font data.

This commit is contained in:
Dmitry Timoshkov 2012-05-11 19:21:00 +09:00 committed by Alexandre Julliard
parent c626528a91
commit 83e88af325
2 changed files with 173 additions and 43 deletions
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211
dlls/gdiplus/font.c
View File

@ -34,21 +34,93 @@ WINE_DEFAULT_DEBUG_CHANNEL (gdiplus);
#include "gdiplus.h"
#include "gdiplus_private.h"
/* PANOSE is 10 bytes in size, need to pack the structure properly */
#include "pshpack2.h"
typedef struct
{
USHORT version;
SHORT xAvgCharWidth;
USHORT usWeightClass;
USHORT usWidthClass;
SHORT fsType;
SHORT ySubscriptXSize;
SHORT ySubscriptYSize;
SHORT ySubscriptXOffset;
SHORT ySubscriptYOffset;
SHORT ySuperscriptXSize;
SHORT ySuperscriptYSize;
SHORT ySuperscriptXOffset;
SHORT ySuperscriptYOffset;
SHORT yStrikeoutSize;
SHORT yStrikeoutPosition;
SHORT sFamilyClass;
PANOSE panose;
ULONG ulUnicodeRange1;
ULONG ulUnicodeRange2;
ULONG ulUnicodeRange3;
ULONG ulUnicodeRange4;
CHAR achVendID[4];
USHORT fsSelection;
USHORT usFirstCharIndex;
USHORT usLastCharIndex;
/* According to the Apple spec, original version didn't have the below fields,
* version numbers were taken from the OpenType spec.
*/
/* version 0 (TrueType 1.5) */
USHORT sTypoAscender;
USHORT sTypoDescender;
USHORT sTypoLineGap;
USHORT usWinAscent;
USHORT usWinDescent;
/* version 1 (TrueType 1.66) */
ULONG ulCodePageRange1;
ULONG ulCodePageRange2;
/* version 2 (OpenType 1.2) */
SHORT sxHeight;
SHORT sCapHeight;
USHORT usDefaultChar;
USHORT usBreakChar;
USHORT usMaxContext;
} TT_OS2_V2;
typedef struct
{
ULONG Version;
SHORT Ascender;
SHORT Descender;
SHORT LineGap;
USHORT advanceWidthMax;
SHORT minLeftSideBearing;
SHORT minRightSideBearing;
SHORT xMaxExtent;
SHORT caretSlopeRise;
SHORT caretSlopeRun;
SHORT caretOffset;
SHORT reserved[4];
SHORT metricDataFormat;
USHORT numberOfHMetrics;
} TT_HHEA;
#include "poppack.h"
#ifdef WORDS_BIGENDIAN
#define GET_BE_WORD(x) (x)
#define GET_BE_DWORD(x) (x)
#else
#define GET_BE_WORD(x) MAKEWORD(HIBYTE(x), LOBYTE(x))
#define GET_BE_DWORD(x) MAKELONG(GET_BE_WORD(HIWORD(x)), GET_BE_WORD(LOWORD(x)));
#endif
#define MS_MAKE_TAG(ch0, ch1, ch2, ch3) \
((DWORD)(BYTE)(ch0) | ((DWORD)(BYTE)(ch1) << 8) | \
((DWORD)(BYTE)(ch2) << 16) | ((DWORD)(BYTE)(ch3) << 24))
#define MS_OS2_TAG MS_MAKE_TAG('O','S','/','2')
#define MS_HHEA_TAG MS_MAKE_TAG('h','h','e','a')
static const REAL mm_per_inch = 25.4;
static const REAL inch_per_point = 1.0/72.0;
static GpFontCollection installedFontCollection = {0};
static inline LONG get_dpi(void)
{
LONG dpi;
HDC hdc = GetDC(0);
dpi = GetDeviceCaps(hdc, LOGPIXELSY);
ReleaseDC (0, hdc);
return dpi;
}
static LONG em_size_to_pixel(REAL em_size, Unit unit, LONG dpi)
{
switch (unit)
@ -121,7 +193,7 @@ GpStatus WINGDIPAPI GdipCreateFont(GDIPCONST GpFontFamily *fontFamily,
stat = GdipGetFamilyName(fontFamily, lfw.lfFaceName, LANG_NEUTRAL);
if (stat != Ok) return stat;
lfw.lfHeight = -em_size_to_pixel(emSize, unit, get_dpi());
lfw.lfHeight = -em_size_to_pixel(emSize, unit, fontFamily->dpi);
lfw.lfWeight = style & FontStyleBold ? FW_BOLD : FW_REGULAR;
lfw.lfItalic = style & FontStyleItalic;
lfw.lfUnderline = style & FontStyleUnderline;
@ -466,12 +538,15 @@ GpStatus WINGDIPAPI GdipGetFontHeight(GDIPCONST GpFont *font,
TRACE("%p %p %p\n", font, graphics, height);
if (graphics)
{
stat = GdipGetDpiY((GpGraphics*)graphics, &dpi);
if (stat != Ok) return stat;
}
else
dpi = font->family->dpi;
if (stat == Ok)
stat = GdipGetFontHeightGivenDPI(font, dpi, height);
return stat;
return GdipGetFontHeightGivenDPI(font, dpi, height);
}
/*******************************************************************************
@ -550,35 +625,84 @@ GpStatus WINGDIPAPI GdipGetFontHeightGivenDPI(GDIPCONST GpFont *font, REAL dpi,
static INT CALLBACK is_font_installed_proc(const LOGFONTW *elf,
const TEXTMETRICW *ntm, DWORD type, LPARAM lParam)
{
if (!ntm || type == RASTER_FONTTYPE)
{
if (type != TRUETYPE_FONTTYPE)
return 1;
}
*(LOGFONTW *)lParam = *elf;
return 0;
}
static BOOL find_installed_font(const WCHAR *name, OUTLINETEXTMETRICW *otm)
struct font_metrics
{
UINT16 em_height, ascent, descent, line_spacing; /* in font units */
int dpi;
};
static BOOL get_font_metrics(HDC hdc, struct font_metrics *fm)
{
OUTLINETEXTMETRICW otm;
TT_OS2_V2 tt_os2;
TT_HHEA tt_hori;
LONG size;
UINT16 line_gap;
otm.otmSize = sizeof(otm);
if (!GetOutlineTextMetricsW(hdc, otm.otmSize, &otm)) return FALSE;
fm->em_height = otm.otmEMSquare;
fm->dpi = GetDeviceCaps(hdc, LOGPIXELSY);
memset(&tt_hori, 0, sizeof(tt_hori));
if (GetFontData(hdc, MS_HHEA_TAG, 0, &tt_hori, sizeof(tt_hori)) != GDI_ERROR)
{
fm->ascent = GET_BE_WORD(tt_hori.Ascender);
fm->descent = -GET_BE_WORD(tt_hori.Descender);
TRACE("hhea: ascent %d, descent %d\n", fm->ascent, fm->descent);
line_gap = GET_BE_WORD(tt_hori.LineGap);
fm->line_spacing = fm->ascent + fm->descent + line_gap;
TRACE("line_gap %u, line_spacing %u\n", line_gap, fm->line_spacing);
if (fm->ascent + fm->descent != 0) return TRUE;
}
size = GetFontData(hdc, MS_OS2_TAG, 0, NULL, 0);
if (size == GDI_ERROR) return FALSE;
if (size > sizeof(tt_os2)) size = sizeof(tt_os2);
memset(&tt_os2, 0, sizeof(tt_os2));
if (GetFontData(hdc, MS_OS2_TAG, 0, &tt_os2, size) != size) return FALSE;
fm->ascent = GET_BE_WORD(tt_os2.usWinAscent);
fm->descent = GET_BE_WORD(tt_os2.usWinDescent);
TRACE("usWinAscent %u, usWinDescent %u\n", fm->ascent, fm->descent);
if (fm->ascent + fm->descent == 0)
{
fm->ascent = GET_BE_WORD(tt_os2.sTypoAscender);
fm->descent = GET_BE_WORD(tt_os2.sTypoDescender);
TRACE("sTypoAscender %u, sTypoDescender %u\n", fm->ascent, fm->descent);
}
line_gap = GET_BE_WORD(tt_os2.sTypoLineGap);
fm->line_spacing = fm->ascent + fm->descent + line_gap;
TRACE("line_gap %u, line_spacing %u\n", line_gap, fm->line_spacing);
return TRUE;
}
static GpStatus find_installed_font(const WCHAR *name, struct font_metrics *fm)
{
LOGFONTW lf;
HDC hdc = CreateCompatibleDC(0);
BOOL ret = FALSE;
GpStatus ret = FontFamilyNotFound;
if(!EnumFontFamiliesW(hdc, name, is_font_installed_proc, (LPARAM)&lf))
{
HFONT hfont;
HFONT hfont, old_font;
lf.lfHeight = -2048;
hfont = CreateFontIndirectW(&lf);
hfont = SelectObject(hdc, hfont);
otm->otmSize = sizeof(*otm);
if (GetOutlineTextMetricsW(hdc, otm->otmSize, otm))
ret = TRUE;
DeleteObject(SelectObject(hdc, hfont));
old_font = SelectObject(hdc, hfont);
ret = get_font_metrics(hdc, fm) ? Ok : NotTrueTypeFont;
SelectObject(hdc, old_font);
DeleteObject(hfont);
}
DeleteDC(hdc);
@ -609,8 +733,9 @@ GpStatus WINGDIPAPI GdipCreateFontFamilyFromName(GDIPCONST WCHAR *name,
GpFontCollection *fontCollection,
GpFontFamily **FontFamily)
{
GpStatus stat;
GpFontFamily* ffamily;
OUTLINETEXTMETRICW otm;
struct font_metrics fm;
TRACE("%s, %p %p\n", debugstr_w(name), fontCollection, FontFamily);
@ -619,14 +744,18 @@ GpStatus WINGDIPAPI GdipCreateFontFamilyFromName(GDIPCONST WCHAR *name,
if (fontCollection)
FIXME("No support for FontCollections yet!\n");
if (!find_installed_font(name, &otm))
return FontFamilyNotFound;
stat = find_installed_font(name, &fm);
if (stat != Ok) return stat;
ffamily = GdipAlloc(sizeof (GpFontFamily));
if (!ffamily) return OutOfMemory;
ffamily->otm = otm;
lstrcpynW(ffamily->FamilyName, name, LF_FACESIZE);
ffamily->em_height = fm.em_height;
ffamily->ascent = fm.ascent;
ffamily->descent = fm.descent;
ffamily->line_spacing = fm.line_spacing;
ffamily->dpi = fm.dpi;
*FontFamily = ffamily;
@ -730,8 +859,8 @@ GpStatus WINGDIPAPI GdipGetCellAscent(GDIPCONST GpFontFamily *family,
{
if (!(family && CellAscent)) return InvalidParameter;
*CellAscent = family->otm.otmTextMetrics.tmAscent;
TRACE("%d => %u\n", family->otm.otmTextMetrics.tmHeight, *CellAscent);
*CellAscent = family->ascent;
TRACE("%s => %u\n", debugstr_w(family->FamilyName), *CellAscent);
return Ok;
}
@ -743,8 +872,8 @@ GpStatus WINGDIPAPI GdipGetCellDescent(GDIPCONST GpFontFamily *family,
if (!(family && CellDescent)) return InvalidParameter;
*CellDescent = family->otm.otmTextMetrics.tmDescent;
TRACE("%d => %u\n", family->otm.otmTextMetrics.tmHeight, *CellDescent);
*CellDescent = family->descent;
TRACE("%s => %u\n", debugstr_w(family->FamilyName), *CellDescent);
return Ok;
}
@ -769,8 +898,8 @@ GpStatus WINGDIPAPI GdipGetEmHeight(GDIPCONST GpFontFamily *family, INT style, U
TRACE("%p (%s), %d, %p\n", family, debugstr_w(family->FamilyName), style, EmHeight);
*EmHeight = family->otm.otmEMSquare;
TRACE("%d => %u\n", family->otm.otmTextMetrics.tmHeight, *EmHeight);
*EmHeight = family->em_height;
TRACE("%s => %u\n", debugstr_w(family->FamilyName), *EmHeight);
return Ok;
}
@ -800,8 +929,8 @@ GpStatus WINGDIPAPI GdipGetLineSpacing(GDIPCONST GpFontFamily *family,
if (style) FIXME("ignoring style\n");
*LineSpacing = family->otm.otmTextMetrics.tmAscent + family->otm.otmTextMetrics.tmDescent + family->otm.otmTextMetrics.tmExternalLeading;
TRACE("%d => %u\n", family->otm.otmTextMetrics.tmHeight, *LineSpacing);
*LineSpacing = family->line_spacing;
TRACE("%s => %u\n", debugstr_w(family->FamilyName), *LineSpacing);
return Ok;
}

3
dlls/gdiplus/gdiplus_private.h
View File

@ -375,8 +375,9 @@ struct GpFontCollection{
};
struct GpFontFamily{
OUTLINETEXTMETRICW otm;
WCHAR FamilyName[LF_FACESIZE];
UINT16 em_height, ascent, descent, line_spacing; /* in font units */
int dpi;
};
/* internal use */