non-kerned-drawing.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2007 Kevin Watters, Kevin Ollivier.  All rights reserved.
 *
 * 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"
#include "GlyphBuffer.h"
#include "GraphicsContext.h"
#include "SimpleFontData.h"

#include <wx/defs.h>
#include <wx/dcclient.h>
#include <wx/dcgraph.h>
#include <wx/gdicmn.h>
#include <vector>

namespace WebCore {

void drawTextWithSpacing(GraphicsContext* graphicsContext, const SimpleFontData* font, const wxColour& color, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point)
{
#if USE(WXGC)
    wxGCDC* dc = static_cast<wxGCDC*>(graphicsContext->platformContext());
#else
    wxDC* dc = graphicsContext->platformContext();
#endif

    wxFont* wxfont = font->getWxFont();
    if (wxfont->IsOk())
        dc->SetFont(*wxfont);
    dc->SetTextForeground(color);

    // convert glyphs to wxString
    GlyphBufferGlyph* glyphs = const_cast<GlyphBufferGlyph*>(glyphBuffer.glyphs(from));
    int offset = point.x();
    wxString text = wxEmptyString;
    for (unsigned i = 0; i < numGlyphs; i++) {
        text = text.Append((wxChar)glyphs[i]);
        offset += glyphBuffer.advanceAt(from + i);
    }
    
    // NOTE: The wx API actually adds the ascent to the y value internally,
    // so we have to subtract it from the y point here so that the ascent
    // isn't added twice. 
    dc->DrawText(text, (wxCoord)point.x(), int(point.y() - font->ascent()));
}

}