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      1 /*
      2  * Copyright (C) 2007 Kevin Watters, Kevin Ollivier.  All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "FloatSize.h"
     28 #include "GlyphBuffer.h"
     29 #include "GraphicsContext.h"
     30 #include "SimpleFontData.h"
     31 #include <wtf/Vector.h>
     32 
     33 #include <ApplicationServices/ApplicationServices.h>
     34 
     35 #include <dlfcn.h>
     36 
     37 #include <wx/defs.h>
     38 #include <wx/dcclient.h>
     39 #include <wx/dcgraph.h>
     40 #include <wx/gdicmn.h>
     41 
     42 
     43 // Unfortunately we need access to a private function to get the character -> glyph conversion needed to
     44 // allow us to use CGContextShowGlyphsWithAdvances
     45 // Note that on < 10.5, the function is called CGFontGetGlyphsForUnicodes, so we need to detect and deal
     46 // with this.
     47 typedef void (*CGFontGetGlyphsForUnicharsPtr)(CGFontRef, const UniChar[], const CGGlyph[], size_t);
     48 static CGFontGetGlyphsForUnicharsPtr CGFontGetGlyphsForUnichars = (CGFontGetGlyphsForUnicharsPtr)dlsym(RTLD_DEFAULT, "CGFontGetGlyphsForUnichars");
     49 
     50 namespace WebCore {
     51 
     52 void drawTextWithSpacing(GraphicsContext* graphicsContext, const SimpleFontData* font, const wxColour& color, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point)
     53 {
     54     graphicsContext->save();
     55 
     56     wxGCDC* dc = static_cast<wxGCDC*>(graphicsContext->platformContext());
     57 
     58     wxFont* wxfont = font->getWxFont();
     59     graphicsContext->setFillColor(graphicsContext->fillColor(), DeviceColorSpace);
     60 
     61     CGContextRef cgContext = static_cast<CGContextRef>(dc->GetGraphicsContext()->GetNativeContext());
     62 
     63     CGFontRef cgFont;
     64 
     65 #ifdef wxOSX_USE_CORE_TEXT && wxOSX_USE_CORE_TEXT
     66     cgFont = CTFontCopyGraphicsFont((CTFontRef)wxfont->OSXGetCTFont(), NULL);
     67 #else
     68     ATSFontRef fontRef;
     69 
     70     fontRef = FMGetATSFontRefFromFont(wxfont->MacGetATSUFontID());
     71 
     72     if (fontRef)
     73         cgFont = CGFontCreateWithPlatformFont((void*)&fontRef);
     74 #endif
     75 
     76     CGContextSetFont(cgContext, cgFont);
     77 
     78     CGContextSetFontSize(cgContext, wxfont->GetPointSize());
     79 
     80     CGFloat red, green, blue, alpha;
     81     graphicsContext->fillColor().getRGBA(red, green, blue, alpha);
     82     CGContextSetRGBFillColor(cgContext, red, green, blue, alpha);
     83 
     84     CGAffineTransform matrix = CGAffineTransformIdentity;
     85     matrix.b = -matrix.b;
     86     matrix.d = -matrix.d;
     87 
     88     CGContextSetTextMatrix(cgContext, matrix);
     89 
     90     CGContextSetTextPosition(cgContext, point.x(), point.y());
     91 
     92     const FloatSize* advanceSizes = static_cast<const FloatSize*>(glyphBuffer.advances(from));
     93     int size = glyphBuffer.size() - from;
     94     CGSize sizes[size];
     95     CGGlyph glyphs[numGlyphs];
     96 
     97     // if the function doesn't exist, we're probably on tiger and need to grab the
     98     // function under its old name, CGFontGetGlyphsForUnicodes
     99     if (!CGFontGetGlyphsForUnichars)
    100         CGFontGetGlyphsForUnichars = (CGFontGetGlyphsForUnicharsPtr)dlsym(RTLD_DEFAULT, "CGFontGetGlyphsForUnicodes");
    101 
    102     // Let's make sure we got the function under one name or another!
    103     ASSERT(CGFontGetGlyphsForUnichars);
    104     CGFontGetGlyphsForUnichars(cgFont, glyphBuffer.glyphs(from), glyphs, numGlyphs);
    105 
    106     for (int i = 0; i < size; i++) {
    107         FloatSize fsize = advanceSizes[i];
    108         sizes[i] = CGSizeMake(fsize.width(), fsize.height());
    109     }
    110 
    111     CGContextShowGlyphsWithAdvances(cgContext, glyphs, sizes, numGlyphs);
    112 
    113     if (cgFont)
    114         CGFontRelease(cgFont);
    115     graphicsContext->restore();
    116 }
    117 
    118 }
    119