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[WIN32SS][FONT] Use HHEA table metrics if (fsSelection & 0x80) (#1093)

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This PR will fix too tiny glyph rendering. CORE-15166
This commit is contained in:
Katayama Hirofumi MZ 2018-12-05 21:05:42 +09:00 committed by GitHub
parent 9c2a264d77
commit 88ddb37acb
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 14 additions and 3 deletions
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17
win32ss/gdi/ntgdi/freetype.c
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@ -3317,11 +3317,13 @@ IntRequestFontSize(PDC dc, PFONTGDI FontGDI, LONG lfWidth, LONG lfHeight)
return FT_Request_Size(face, &req);
}
/* See also: https://docs.microsoft.com/en-us/typography/opentype/spec/os2#fsselection */
#define FM_SEL_USE_TYPO_METRICS 0x80
if (lfHeight > 0)
{
/* case (A): lfHeight is positive */
Sum = pOS2->usWinAscent + pOS2->usWinDescent;
if (Sum == 0)
if (Sum == 0 || (pOS2->fsSelection & FM_SEL_USE_TYPO_METRICS))
{
Ascent = pHori->Ascender;
Descent = -pHori->Descender;
@ -3341,11 +3343,20 @@ IntRequestFontSize(PDC dc, PFONTGDI FontGDI, LONG lfWidth, LONG lfHeight)
else if (lfHeight < 0)
{
/* case (B): lfHeight is negative */
FontGDI->tmAscent = FT_MulDiv(-lfHeight, pOS2->usWinAscent, face->units_per_EM);
FontGDI->tmDescent = FT_MulDiv(-lfHeight, pOS2->usWinDescent, face->units_per_EM);
if (pOS2->fsSelection & FM_SEL_USE_TYPO_METRICS)
{
FontGDI->tmAscent = FT_MulDiv(-lfHeight, pHori->Ascender, face->units_per_EM);
FontGDI->tmDescent = FT_MulDiv(-lfHeight, -pHori->Descender, face->units_per_EM);
}
else
{
FontGDI->tmAscent = FT_MulDiv(-lfHeight, pOS2->usWinAscent, face->units_per_EM);
FontGDI->tmDescent = FT_MulDiv(-lfHeight, pOS2->usWinDescent, face->units_per_EM);
}
FontGDI->tmHeight = FontGDI->tmAscent + FontGDI->tmDescent;
FontGDI->tmInternalLeading = FontGDI->tmHeight + lfHeight;
}
#undef FM_SEL_USE_TYPO_METRICS
FontGDI->EmHeight = FontGDI->tmHeight - FontGDI->tmInternalLeading;
FontGDI->EmHeight = max(FontGDI->EmHeight, 1);