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
dmin(double a,double b)49 static inline double dmin(double a, double b) { return a < b ? a : b; }
dmax(double a,double b)50 static inline double dmax(double a, double b) { return a > b ? a : b; }
51
DegToRad(double deg)52 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
RadToDeg(double deg)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
drawTextWithSpacing(GraphicsContext * graphicsContext,const SimpleFontData * font,const wxColour & color,const GlyphBuffer & glyphBuffer,int from,int numGlyphs,const FloatPoint & point)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