| /* |
| * Copyright (C) 2007 Kevin Ollivier <kevino@theolliviers.com> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| // this needs to be included before fontprops.h for UChar* to be defined. |
| #include <wtf/unicode/Unicode.h> |
| |
| #include "fontprops.h" |
| #include "WebCoreSystemInterface.h" |
| |
| #include <ApplicationServices/ApplicationServices.h> |
| |
| #include <wx/defs.h> |
| #include <wx/gdicmn.h> |
| #include <wx/graphics.h> |
| |
| const float smallCapsFontSizeMultiplier = 0.7f; |
| const float contextDPI = 72.0f; |
| static inline float scaleEmToUnits(float x, unsigned unitsPerEm) { return x * (contextDPI / (contextDPI * unitsPerEm)); } |
| |
| wxFontProperties::wxFontProperties(wxFont* font): |
| m_ascent(0), m_descent(0), m_lineGap(0), m_lineSpacing(0), m_xHeight(0) |
| { |
| CGFontRef cgFont; |
| |
| #ifdef wxOSX_USE_CORE_TEXT && wxOSX_USE_CORE_TEXT |
| cgFont = CTFontCopyGraphicsFont((CTFontRef)font->OSXGetCTFont(), NULL); |
| #else |
| ATSFontRef fontRef; |
| |
| fontRef = FMGetATSFontRefFromFont(font->MacGetATSUFontID()); |
| |
| if (fontRef) |
| cgFont = CGFontCreateWithPlatformFont((void*)&fontRef); |
| #endif |
| |
| if (cgFont) { |
| int iAscent; |
| int iDescent; |
| int iLineGap; |
| unsigned unitsPerEm; |
| iAscent = CGFontGetAscent(cgFont); |
| iDescent = CGFontGetDescent(cgFont); |
| iLineGap = CGFontGetLeading(cgFont); |
| unitsPerEm = CGFontGetUnitsPerEm(cgFont); |
| float pointSize = font->GetPointSize(); |
| float fAscent = scaleEmToUnits(iAscent, unitsPerEm) * pointSize; |
| float fDescent = -scaleEmToUnits(iDescent, unitsPerEm) * pointSize; |
| float fLineGap = scaleEmToUnits(iLineGap, unitsPerEm) * pointSize; |
| |
| m_ascent = lroundf(fAscent); |
| m_descent = lroundf(fDescent); |
| m_lineGap = lroundf(fLineGap); |
| wxCoord xHeight = 0; |
| GetTextExtent(*font, wxT("x"), NULL, &xHeight, NULL, NULL); |
| m_xHeight = lroundf(xHeight); |
| m_lineSpacing = m_ascent + m_descent + m_lineGap; |
| |
| } |
| |
| if (cgFont) |
| CGFontRelease(cgFont); |
| |
| } |
| |
| bool wxFontContainsCharacters(void* font, const UChar* characters, int length) |
| { |
| NSString* string = [[NSString alloc] initWithCharactersNoCopy:const_cast<unichar*>(characters) length:length freeWhenDone:NO]; |
| NSCharacterSet* set = [[(NSFont*)font coveredCharacterSet] invertedSet]; |
| bool result = set && [string rangeOfCharacterFromSet:set].location == NSNotFound; |
| [string release]; |
| return result; |
| } |
| |
| void GetTextExtent( const wxFont& font, const wxString& str, wxCoord *width, wxCoord *height, |
| wxCoord *descent, wxCoord *externalLeading ) |
| { |
| wxGraphicsContext * const gc = wxGraphicsContext::Create(); |
| |
| gc->SetFont(font, *wxBLACK); // colour doesn't matter but must be specified |
| struct GCTextExtent |
| { |
| wxDouble width, height, descent, externalLeading; |
| } e; |
| gc->GetTextExtent(str, &e.width, &e.height, &e.descent, &e.externalLeading); |
| if ( width ) |
| *width = wxCoord(e.width + .5); |
| if ( height ) |
| *height = wxCoord(e.height + .5); |
| if ( descent ) |
| *descent = wxCoord(e.descent + .5); |
| if ( externalLeading ) |
| *externalLeading = wxCoord(e.externalLeading + .5); |
| |
| delete gc; |
| } |