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tdf#103725: Fix horizontal scaling on Windows

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* Restore the hack for adjusting font width on Windows, for the life of
  me I can’t find where we change font width or why I get different
  values on Windows than Linux.
* Create IDWriteFont from LOGFONT instead of HDC, as it seems the later
  will discard the font width.

Change-Id: I74d6685b8c2a6f5d8087f439fbb02f0343f13691
This commit is contained in:
Khaled Hosny
2016-11-11 13:58:21 +02:00
parent b9ed8e553e
commit 30fefcf714
3 changed files with 37 additions and 22 deletions
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6
vcl/source/gdi/CommonSalLayout.cxx
View File

@@ -95,7 +95,13 @@ void CommonSalLayout::getScale(double* nXScale, double* nYScale)
unsigned int nUPEM = hb_face_get_upem(pHbFace);
double nHeight(mrFontSelData.mnHeight);
#if _WIN32
// FIXME: we get very weird font width on Windows, the number below is
// “reverse engineered” so that I get the width I’m expecting.
double nWidth(mrFontSelData.mnWidth ? mrFontSelData.mnWidth * 1.8285 : nHeight);
#else
double nWidth(mrFontSelData.mnWidth ? mrFontSelData.mnWidth : nHeight);
#endif
if (nYScale)
*nYScale = nHeight / nUPEM;

37
vcl/win/gdi/salfont.cxx
View File

@@ -1106,24 +1106,27 @@ HFONT WinSalGraphics::ImplDoSetFont( FontSelectPattern* i_pFont, float& o_rFontS
LOGFONTW aLogFont;
ImplGetLogFontFromFontSelect( getHDC(), i_pFont, aLogFont, true );
// #i47675# limit font requests to MAXFONTHEIGHT
// TODO: share MAXFONTHEIGHT font instance
if( (-aLogFont.lfHeight <= MAXFONTHEIGHT)
&& (+aLogFont.lfWidth <= MAXFONTHEIGHT) )
if (!SalLayout::UseCommonLayout())
{
o_rFontScale = 1.0;
}
else if( -aLogFont.lfHeight >= +aLogFont.lfWidth )
{
o_rFontScale = -aLogFont.lfHeight / (float)MAXFONTHEIGHT;
aLogFont.lfHeight = -MAXFONTHEIGHT;
aLogFont.lfWidth = FRound( aLogFont.lfWidth / o_rFontScale );
}
else // #i95867# also limit font widths
{
o_rFontScale = +aLogFont.lfWidth / (float)MAXFONTHEIGHT;
aLogFont.lfWidth = +MAXFONTHEIGHT;
aLogFont.lfHeight = FRound( aLogFont.lfHeight / o_rFontScale );
// #i47675# limit font requests to MAXFONTHEIGHT
// TODO: share MAXFONTHEIGHT font instance
if( (-aLogFont.lfHeight <= MAXFONTHEIGHT)
&& (+aLogFont.lfWidth <= MAXFONTHEIGHT) )
{
o_rFontScale = 1.0;
}
else if( -aLogFont.lfHeight >= +aLogFont.lfWidth )
{
o_rFontScale = -aLogFont.lfHeight / (float)MAXFONTHEIGHT;
aLogFont.lfHeight = -MAXFONTHEIGHT;
aLogFont.lfWidth = FRound( aLogFont.lfWidth / o_rFontScale );
}
else // #i95867# also limit font widths
{
o_rFontScale = +aLogFont.lfWidth / (float)MAXFONTHEIGHT;
aLogFont.lfWidth = +MAXFONTHEIGHT;
aLogFont.lfHeight = FRound( aLogFont.lfHeight / o_rFontScale );
}
}
hNewFont = ::CreateFontIndirectW( &aLogFont );

16
vcl/win/gdi/winlayout.cxx
View File

@@ -3599,9 +3599,19 @@ std::vector<Rectangle> D2DWriteTextOutRenderer::GetGlyphInkBoxes(uint16_t * pGid
bool D2DWriteTextOutRenderer::GetDWriteFaceFromHDC(HDC hDC, IDWriteFontFace ** ppFontFace, float * lfSize) const
{
bool succeeded = false;
IDWriteFont* pFont;
LOGFONTW aLogFont;
HFONT hFont = static_cast<HFONT>(::GetCurrentObject(hDC, OBJ_FONT));
GetObjectW(hFont, sizeof(LOGFONTW), &aLogFont);
try
{
succeeded = SUCCEEDED(mpGdiInterop->CreateFontFaceFromHdc(hDC, ppFontFace));
succeeded = SUCCEEDED(mpGdiInterop->CreateFontFromLOGFONT(&aLogFont, &pFont));
if (succeeded)
{
succeeded = SUCCEEDED(pFont->CreateFontFace(ppFontFace));
pFont->Release();
}
}
catch (const std::exception& e)
{
@@ -3611,10 +3621,6 @@ bool D2DWriteTextOutRenderer::GetDWriteFaceFromHDC(HDC hDC, IDWriteFontFace ** p
if (succeeded)
{
LOGFONTW aLogFont;
HFONT hFont = static_cast<HFONT>(::GetCurrentObject(hDC, OBJ_FONT));
GetObjectW(hFont, sizeof(LOGFONTW), &aLogFont);
float dpix, dpiy;
mpRT->GetDpi(&dpix, &dpiy);
*lfSize = aLogFont.lfHeight * 96.0f / dpiy;