Magic-Mirror/gecko-dev
1
0
Fork 0
mirror of https://github.com/mozilla/gecko-dev.git synced 2024-12-14 02:31:59 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

connected outline metrics

Browse Source
This commit is contained in:
peterl%netscape.com 1998-09-17 00:17:23 +00:00
parent 4fef07a869
commit 4a06f95f5d
2 changed files with 71 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
gfx/src/windows/nsFontMetricsWin.cpp
View File

@ -169,24 +169,23 @@ nsFontMetricsWin::RealizeFont()
{
// Fill in logFont structure; stolen from awt
LOGFONT logFont;
logFont.lfWidth = 0;
logFont.lfWidth = 0;
logFont.lfEscapement = 0;
logFont.lfOrientation = 0;
logFont.lfUnderline =
logFont.lfUnderline =
(mFont->decorations & NS_FONT_DECORATION_UNDERLINE)
? TRUE : FALSE;
? TRUE : FALSE;
logFont.lfStrikeOut =
(mFont->decorations & NS_FONT_DECORATION_LINE_THROUGH)
? TRUE : FALSE;
? TRUE : FALSE;
logFont.lfCharSet = DEFAULT_CHARSET;
logFont.lfOutPrecision = OUT_DEFAULT_PRECIS;
logFont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
logFont.lfQuality = DEFAULT_QUALITY;
logFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
logFont.lfWeight = (mFont->weight > NS_FONT_WEIGHT_NORMAL) // XXX ??? this should be smarter
? FW_BOLD : FW_NORMAL;
logFont.lfItalic = (mFont->style & NS_FONT_STYLE_ITALIC)
? TRUE : FALSE;
logFont.lfWeight = ((400 < mFont->weight) ? FW_BOLD : FW_NORMAL); // XXX could be smarter
logFont.lfItalic = (mFont->style & (NS_FONT_STYLE_ITALIC | NS_FONT_STYLE_OBLIQUE))
? TRUE : FALSE; // XXX need better oblique support
float app2dev, app2twip;
mDeviceContext->GetAppUnitsToDevUnits(app2dev);
mDeviceContext->GetDevUnitsToTwips(app2twip);
@ -220,15 +219,40 @@ nsFontMetricsWin::RealizeFont()
// Get font metrics
float dev2app;
mDeviceContext->GetDevUnitsToAppUnits(dev2app);
TEXTMETRIC metrics;
::GetTextMetrics(dc, &metrics);
mHeight = nscoord(metrics.tmHeight * dev2app);
mAscent = nscoord(metrics.tmAscent * dev2app);
mDescent = nscoord(metrics.tmDescent * dev2app);
mLeading = nscoord(metrics.tmInternalLeading * dev2app);
mMaxAscent = nscoord(metrics.tmAscent * dev2app);
mMaxDescent = nscoord(metrics.tmDescent * dev2app);
mMaxAdvance = nscoord(metrics.tmMaxCharWidth * dev2app);
OUTLINETEXTMETRIC oMetrics;
TEXTMETRIC& metrics = oMetrics.otmTextMetrics;
if (0 < ::GetOutlineTextMetrics(dc, sizeof(oMetrics), &oMetrics)) {
mXHeight = NSToCoordRound(oMetrics.otmsXHeight * dev2app);
mSuperscriptOffset = NSToCoordRound(oMetrics.otmptSuperscriptOffset.y * dev2app);
mSubscriptOffset = NSToCoordRound(oMetrics.otmptSubscriptOffset.y * dev2app);
mStrikeoutSize = NSToCoordRound(oMetrics.otmsStrikeoutSize * dev2app);
mStrikeoutOffset = NSToCoordRound(oMetrics.otmsStrikeoutPosition * dev2app);
mUnderlineSize = NSToCoordRound(oMetrics.otmsUnderscoreSize * dev2app);
mUnderlineOffset = NSToCoordRound(oMetrics.otmsUnderscorePosition * dev2app);
}
else {
// Make a best-effort guess at extended metrics
// this is based on general typographic guidelines
::GetTextMetrics(dc, &metrics);
mXHeight = NSToCoordRound((float)metrics.tmAscent * dev2app * 0.56f); // 56% of ascent
mSuperscriptOffset = mXHeight; // XXX temporary code!
mSubscriptOffset = mXHeight; // XXX temporary code!
mStrikeoutSize = NSToCoordRound(1 * dev2app); // XXX this is a guess
mStrikeoutOffset = NSToCoordRound(mXHeight / 2.0f); // 50% of xHeight
mUnderlineSize = NSToCoordRound(1 * dev2app); // XXX this is a guess
mUnderlineOffset = -NSToCoordRound((float)metrics.tmDescent * dev2app * 0.30f); // 30% of descent
}
mHeight = NSToCoordRound(metrics.tmHeight * dev2app);
mAscent = NSToCoordRound(metrics.tmAscent * dev2app);
mDescent = NSToCoordRound(metrics.tmDescent * dev2app);
mLeading = NSToCoordRound(metrics.tmInternalLeading * dev2app);
mMaxAscent = NSToCoordRound(metrics.tmAscent * dev2app);
mMaxDescent = NSToCoordRound(metrics.tmDescent * dev2app);
mMaxAdvance = NSToCoordRound(metrics.tmMaxCharWidth * dev2app);
::ReleaseDC(win, dc);
}
@ -236,21 +260,37 @@ nsFontMetricsWin::RealizeFont()
NS_IMETHODIMP
nsFontMetricsWin :: GetXHeight(nscoord& aResult)
{
aResult = mMaxAscent / 2; // XXX temporary code!
aResult = mXHeight;
return NS_OK;
}
NS_IMETHODIMP
nsFontMetricsWin :: GetSuperscriptOffset(nscoord& aResult)
{
aResult = mMaxAscent / 2; // XXX temporary code!
aResult = mSuperscriptOffset;
return NS_OK;
}
NS_IMETHODIMP
nsFontMetricsWin :: GetSubscriptOffset(nscoord& aResult)
{
aResult = mMaxAscent / 2; // XXX temporary code!
aResult = mSubscriptOffset;
return NS_OK;
}
NS_IMETHODIMP
nsFontMetricsWin :: GetStrikeout(nscoord& aOffset, nscoord& aSize)
{
aOffset = mStrikeoutOffset;
aSize = mStrikeoutSize;
return NS_OK;
}
NS_IMETHODIMP
nsFontMetricsWin :: GetUnderline(nscoord& aOffset, nscoord& aSize)
{
aOffset = mUnderlineOffset;
aSize = mUnderlineSize;
return NS_OK;
}
@ -298,7 +338,7 @@ nsFontMetricsWin :: GetWidth(const char* aString,
float dev2app;
mDeviceContext->GetDevUnitsToAppUnits(dev2app);
aWidth = nscoord(float(size.cx) * dev2app);
aWidth = NSToCoordRound(float(size.cx) * dev2app);
return NS_OK;
}
@ -330,7 +370,7 @@ nsFontMetricsWin :: GetWidth(const PRUnichar *aString,
float dev2app;
mDeviceContext->GetDevUnitsToAppUnits(dev2app);
aWidth = nscoord(float(size.cx) * dev2app);
aWidth = NSToCoordRound(float(size.cx) * dev2app);
return NS_OK;
}

9
gfx/src/windows/nsFontMetricsWin.h
View File

@ -48,6 +48,8 @@ public:
NS_IMETHOD GetXHeight(nscoord& aResult);
NS_IMETHOD GetSuperscriptOffset(nscoord& aResult);
NS_IMETHOD GetSubscriptOffset(nscoord& aResult);
NS_IMETHOD GetStrikeout(nscoord& aOffset, nscoord& aSize);
NS_IMETHOD GetUnderline(nscoord& aOffset, nscoord& aSize);
NS_IMETHOD GetWidth(char aC, nscoord& aWidth);
NS_IMETHOD GetWidth(PRUnichar aC, nscoord& aWidth);
NS_IMETHOD GetWidth(const nsString& aString, nscoord& aWidth);
@ -77,6 +79,13 @@ protected:
nscoord mMaxAscent;
nscoord mMaxDescent;
nscoord mMaxAdvance;
nscoord mXHeight;
nscoord mSuperscriptOffset;
nscoord mSubscriptOffset;
nscoord mStrikeoutSize;
nscoord mStrikeoutOffset;
nscoord mUnderlineSize;
nscoord mUnderlineOffset;
HFONT mFontHandle;
};