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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 "GlyphBuffer.h"
     28 #include "GraphicsContext.h"
     29 #include "SimpleFontData.h"
     30 
     31 #include <wx/defs.h>
     32 #include <wx/dcclient.h>
     33 #include <wx/dcgraph.h>
     34 #include <wx/gdicmn.h>
     35 #include <vector>
     36 
     37 using namespace std;
     38 
     39 //-----------------------------------------------------------------------------
     40 // constants
     41 //-----------------------------------------------------------------------------
     42 
     43 const double RAD2DEG = 180.0 / M_PI;
     44 
     45 //-----------------------------------------------------------------------------
     46 // Local functions
     47 //-----------------------------------------------------------------------------
     48 
     49 static inline double dmin(double a, double b) { return a < b ? a : b; }
     50 static inline double dmax(double a, double b) { return a > b ? a : b; }
     51 
     52 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
     53 static inline double RadToDeg(double deg) { return (deg * 180.0) / M_PI; }
     54 
     55 #include "wx/msw/private.h"
     56 
     57 // TODO remove this dependency (gdiplus needs the macros)
     58 
     59 #ifndef max
     60 #define max(a,b)            (((a) > (b)) ? (a) : (b))
     61 #endif
     62 
     63 #ifndef min
     64 #define min(a,b)            (((a) < (b)) ? (a) : (b))
     65 #endif
     66 
     67 #include "gdiplus.h"
     68 
     69 
     70 namespace WebCore {
     71 
     72 void drawTextWithSpacing(GraphicsContext* graphicsContext, const SimpleFontData* font, const wxColour& color, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point)
     73 {
     74 #if USE(WXGC)
     75     wxGCDC* dc = static_cast<wxGCDC*>(graphicsContext->platformContext());
     76 #else
     77     wxDC* dc = graphicsContext->platformContext();
     78 #endif
     79 
     80     // get the native HDC handle to draw using native APIs
     81     HDC hdc = 0;
     82     float y = point.y() - font->fontMetrics().ascent();
     83     float x = point.x();
     84 
     85 #if USE(WXGC)
     86     // when going from GdiPlus -> Gdi, any GdiPlus transformations are lost
     87     // so we need to alter the coordinates to reflect their transformed point.
     88     double xtrans = 0;
     89     double ytrans = 0;
     90 
     91     wxGraphicsContext* gc = dc->GetGraphicsContext();
     92     gc->GetTransform().TransformPoint(&xtrans, &ytrans);
     93     Gdiplus::Graphics* g;
     94     if (gc) {
     95         g = (Gdiplus::Graphics*)gc->GetNativeContext();
     96         hdc = g->GetHDC();
     97     }
     98     x += (int)xtrans;
     99     y += (int)ytrans;
    100 #else
    101     hdc = static_cast<HDC>(dc->GetHDC());
    102 #endif
    103 
    104     // ExtTextOut wants the offsets as an array of ints, so extract them
    105     // from the glyph buffer
    106     const GlyphBufferGlyph*   glyphs   = glyphBuffer.glyphs(from);
    107     const GlyphBufferAdvance* advances = glyphBuffer.advances(from);
    108 
    109     int* spacing = new int[numGlyphs - from];
    110     for (unsigned i = 0; i < numGlyphs; ++i)
    111         spacing[i] = advances[i].width();
    112 
    113     wxFont* wxfont = font->getWxFont();
    114     if (wxfont && wxfont->IsOk())
    115         ::SelectObject(hdc, GetHfontOf(*wxfont));
    116 
    117     if (color.Ok())
    118         ::SetTextColor(hdc, color.GetPixel());
    119 
    120     // do not draw background behind characters
    121     ::SetBkMode(hdc, TRANSPARENT);
    122 
    123     // draw text with optional character widths array
    124     wxString string = wxString((wxChar*)(&glyphs[from]), numGlyphs);
    125     ::ExtTextOut(hdc, x, y,  ETO_GLYPH_INDEX, 0, reinterpret_cast<const WCHAR*>(glyphs), numGlyphs, spacing);
    126 
    127     ::SetBkMode(hdc, TRANSPARENT);
    128 
    129     #if USE(WXGC)
    130         g->ReleaseHDC(hdc);
    131     #endif
    132 
    133     delete [] spacing;
    134 }
    135 
    136 }
    137