Use Windows metrics for font scaling.
This commit is contained in:
Ian Pilcher
Alexandre Julliard
parent
1c61b3babc
commit
d80b7a0776
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@ -13,6 +13,118 @@
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DEFAULT_DEBUG_CHANNEL(psdrv);
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/*******************************************************************************
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* ScaleFont
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*
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* Scale font to requested lfHeight
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*
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*/
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inline static float round(float f)
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{
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return (f > 0) ? (f + 0.5) : (f - 0.5);
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}
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static void ScaleFont(DC *dc, LOGFONTW *lf, PSDRV_PDEVICE *physDev)
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{
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PSFONT *font = &(physDev->font);
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WINMETRICS *wm = &(font->afm->WinMetrics);
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TEXTMETRICW *tm = &(font->tm);
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LONG lfHeight_ds;
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USHORT usUnitsPerEm, usWinAscent, usWinDescent;
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SHORT sAscender, sDescender, sLineGap, sTypoAscender;
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SHORT sTypoDescender, sTypoLineGap, sAvgCharWidth;
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TRACE("'%s' %li\n", font->afm->FontName, lf->lfHeight);
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lfHeight_ds = INTERNAL_YWSTODS(dc, lf->lfHeight); /* world->viewport */
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if (lfHeight_ds < 0) /* match em height */
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{
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font->scale = - ((float)lfHeight_ds / (float)(wm->usUnitsPerEm));
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}
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else /* match cell height */
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{
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font->scale = (float)lfHeight_ds /
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(float)(wm->usWinAscent + wm->usWinDescent);
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}
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physDev->font.size = (INT)round(font->scale * (float)wm->usUnitsPerEm);
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physDev->font.escapement = lf->lfEscapement;
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physDev->font.set = FALSE;
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usUnitsPerEm = (USHORT)round((float)(wm->usUnitsPerEm) * font->scale);
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sAscender = (SHORT)round((float)(wm->sAscender) * font->scale);
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sDescender = (SHORT)round((float)(wm->sDescender) * font->scale);
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sLineGap = (SHORT)round((float)(wm->sLineGap) * font->scale);
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sTypoAscender = (SHORT)round((float)(wm->sTypoAscender) * font->scale);
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sTypoDescender = (SHORT)round((float)(wm->sTypoDescender) * font->scale);
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sTypoLineGap = (SHORT)round((float)(wm->sTypoLineGap) * font->scale);
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usWinAscent = (USHORT)round((float)(wm->usWinAscent) * font->scale);
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usWinDescent = (USHORT)round((float)(wm->usWinDescent) * font->scale);
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sAvgCharWidth = (SHORT)round((float)(wm->sAvgCharWidth) * font->scale);
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tm->tmAscent = (LONG)usWinAscent;
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tm->tmDescent = (LONG)usWinDescent;
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tm->tmHeight = tm->tmAscent + tm->tmDescent;
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tm->tmInternalLeading = tm->tmHeight - (LONG)usUnitsPerEm;
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if (tm->tmInternalLeading < 0)
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tm->tmInternalLeading = 0;
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tm->tmExternalLeading =
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(LONG)(sAscender - sDescender + sLineGap) - tm->tmHeight;
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if (tm->tmExternalLeading < 0)
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tm->tmExternalLeading = 0;
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/*
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* Character widths are stored as PostScript metrics, which assume an
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* em square size of 1000.
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*/
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tm->tmAveCharWidth = (LONG)sAvgCharWidth;
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tm->tmMaxCharWidth = (LONG)round(
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(font->afm->FontBBox.urx - font->afm->FontBBox.llx) *
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font->scale * (float)(wm->usUnitsPerEm) / 1000.0);
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tm->tmWeight = font->afm->Weight;
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tm->tmItalic = (font->afm->ItalicAngle != 0.0);
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tm->tmUnderlined = 0;
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tm->tmStruckOut = 0;
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tm->tmFirstChar = (WCHAR)(font->afm->Metrics[0].UV);
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tm->tmLastChar =
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(WCHAR)(font->afm->Metrics[font->afm->NumofMetrics - 1].UV);
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tm->tmDefaultChar = 0x001f; /* Win2K does this - FIXME? */
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tm->tmBreakChar = tm->tmFirstChar; /* should be 'space' */
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/* Assume that a font with an em square size of 1000 is a PostScript font */
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tm->tmPitchAndFamily = (font->afm->IsFixedPitch ? 0 : TMPF_FIXED_PITCH) |
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((wm->usUnitsPerEm == 1000) ? TMPF_DEVICE : TMPF_TRUETYPE) |
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TMPF_VECTOR; /* TMPF_VECTOR always set per Win32 API doc */
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tm->tmCharSet = ANSI_CHARSET; /* FIXME */
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tm->tmOverhang = 0;
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tm->tmDigitizedAspectX = dc->devCaps->logPixelsY;
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tm->tmDigitizedAspectY = dc->devCaps->logPixelsX;
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/*
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* This is kludgy. font->scale is used in several places in the driver
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* to adjust PostScript-style metrics. Since these metrics have been
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* "normalized" to an em-square size of 1000, font->scale needs to be
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* similarly adjusted..
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*/
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font->scale *= (float)wm->usUnitsPerEm / 1000.0;
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TRACE("Selected PS font '%s' size %d weight %ld.\n",
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physDev->font.afm->FontName, physDev->font.size,
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physDev->font.tm.tmWeight );
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TRACE("H = %ld As = %ld Des = %ld IL = %ld EL = %ld\n",
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physDev->font.tm.tmHeight, physDev->font.tm.tmAscent,
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physDev->font.tm.tmDescent, physDev->font.tm.tmInternalLeading,
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physDev->font.tm.tmExternalLeading);
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}
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/***********************************************************************
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* PSDRV_FONT_SelectObject
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@ -24,7 +136,6 @@ HFONT PSDRV_FONT_SelectObject( DC * dc, HFONT hfont )
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PSDRV_PDEVICE *physDev = (PSDRV_PDEVICE *)dc->physDev;
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BOOL bd = FALSE, it = FALSE;
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AFMLISTENTRY *afmle;
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AFM *afm;
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FONTFAMILY *family;
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char FaceName[LF_FACESIZE];
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@ -134,54 +245,10 @@ HFONT PSDRV_FONT_SelectObject( DC * dc, HFONT hfont )
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if(!afmle)
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afmle = family->afmlist; /* not ideal */
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afm = afmle->afm;
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TRACE("Got font '%s'\n", afmle->afm->FontName);
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physDev->font.afm = afm;
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physDev->font.tm.tmHeight = INTERNAL_YWSTODS(dc, lf.lfHeight);
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if(physDev->font.tm.tmHeight < 0) {
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physDev->font.tm.tmHeight *= - (afm->FullAscender - afm->Descender) /
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(afm->Ascender - afm->Descender);
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TRACE("Fixed -ve height to %ld\n", physDev->font.tm.tmHeight);
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}
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physDev->font.size = physDev->font.tm.tmHeight * 1000.0 /
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(afm->FullAscender - afm->Descender);
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physDev->font.scale = physDev->font.size / 1000.0;
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physDev->font.escapement = lf.lfEscapement;
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physDev->font.tm.tmAscent = afm->FullAscender * physDev->font.scale;
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physDev->font.tm.tmDescent = -afm->Descender * physDev->font.scale;
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physDev->font.tm.tmInternalLeading = (afm->FullAscender - afm->Ascender)
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* physDev->font.scale;
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physDev->font.tm.tmExternalLeading = (1000.0 - afm->FullAscender)
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* physDev->font.scale; /* ?? */
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physDev->font.tm.tmAveCharWidth = afm->CharWidths[120] * /* x */
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physDev->font.scale;
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physDev->font.tm.tmMaxCharWidth = afm->CharWidths[77] * /* M */
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physDev->font.scale;
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physDev->font.tm.tmWeight = afm->Weight;
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physDev->font.tm.tmItalic = afm->ItalicAngle != 0.0;
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physDev->font.tm.tmUnderlined = lf.lfUnderline;
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physDev->font.tm.tmStruckOut = lf.lfStrikeOut;
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physDev->font.tm.tmFirstChar = 32;
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physDev->font.tm.tmLastChar = 251;
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physDev->font.tm.tmDefaultChar = 128;
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physDev->font.tm.tmBreakChar = 32;
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physDev->font.tm.tmPitchAndFamily = afm->IsFixedPitch ? 0 :
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TMPF_FIXED_PITCH;
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physDev->font.tm.tmPitchAndFamily |= TMPF_DEVICE;
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physDev->font.tm.tmCharSet = ANSI_CHARSET;
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physDev->font.tm.tmOverhang = 0;
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physDev->font.tm.tmDigitizedAspectX = dc->devCaps->logPixelsY;
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physDev->font.tm.tmDigitizedAspectY = dc->devCaps->logPixelsX;
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physDev->font.set = FALSE;
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TRACE("Selected PS font '%s' size %d weight %ld.\n",
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physDev->font.afm->FontName, physDev->font.size,
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physDev->font.tm.tmWeight );
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TRACE("H = %ld As = %ld Des = %ld IL = %ld EL = %ld\n",
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physDev->font.tm.tmHeight, physDev->font.tm.tmAscent,
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physDev->font.tm.tmDescent, physDev->font.tm.tmInternalLeading,
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physDev->font.tm.tmExternalLeading);
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physDev->font.afm = afmle->afm;
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ScaleFont(dc, &lf, physDev);
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return prevfont;
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}
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