1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* 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"
#include <wtf/MathExtras.h>
// Unicode.h needs to be included before fontprops.h for UChar* to be defined.
// FIXME: This is wrong, fontprops.h should just forward-declare UChar.
#include <wtf/unicode/Unicode.h>
#include "fontprops.h"
#include "math.h"
#include <wx/defs.h>
#include <wx/gdicmn.h>
#include <wx/wx.h>
#include "wx/msw/private.h"
#include <mlang.h>
#include <usp10.h>
inline long my_round(double x)
{
return (long)(x < 0 ? x - 0.5 : x + 0.5);
}
wxFontProperties::wxFontProperties(wxFont* font):
m_ascent(0), m_descent(0), m_lineGap(0), m_lineSpacing(0), m_xHeight(0)
{
HDC dc = GetDC(0);
WXHFONT hFont = font->GetHFONT();
::SelectObject(dc, hFont);
if (font){
int height = font->GetPointSize();
TEXTMETRIC tm;
GetTextMetrics(dc, &tm);
m_ascent = lroundf(tm.tmAscent);
m_descent = lroundf(tm.tmDescent);
m_xHeight = m_ascent * 0.56f; // Best guess for xHeight for non-Truetype fonts.
m_lineGap = lroundf(tm.tmExternalLeading);
m_lineSpacing = m_lineGap + m_ascent + m_descent;
}
RestoreDC(dc, -1);
ReleaseDC(0, dc);
}
bool wxFontContainsCharacters(void* font, const UChar* characters, int length)
{
// FIXME: Microsoft documentation seems to imply that characters can be output using a given font and DC
// merely by testing code page intersection. This seems suspect though. Can't a font only partially
// cover a given code page?
static IMultiLanguage *multiLanguage;
if (!multiLanguage) {
if (CoCreateInstance(CLSID_CMultiLanguage, 0, CLSCTX_ALL, IID_IMultiLanguage, (void**)&multiLanguage) != S_OK)
return true;
}
static IMLangFontLink2* langFontLink;
if (!langFontLink) {
if (multiLanguage->QueryInterface(&langFontLink) != S_OK)
return true;
}
HDC dc = GetDC(0);
DWORD acpCodePages;
langFontLink->CodePageToCodePages(CP_ACP, &acpCodePages);
DWORD fontCodePages;
langFontLink->GetFontCodePages(dc, (HFONT)font, &fontCodePages);
DWORD actualCodePages;
long numCharactersProcessed;
long offset = 0;
while (offset < length) {
langFontLink->GetStrCodePages(characters, length, acpCodePages, &actualCodePages, &numCharactersProcessed);
if ((actualCodePages & fontCodePages))
return false;
offset += numCharactersProcessed;
}
ReleaseDC(0, dc);
return true;
}
void GetTextExtent( const wxFont& font, const wxString& str, wxCoord *width, wxCoord *height,
wxCoord *descent, wxCoord *externalLeading )
{
HDC dc = GetDC(0);
WXHFONT hFont = font.GetHFONT();
::SelectObject(dc, hFont);
HFONT hfontOld;
if ( font != wxNullFont )
{
wxASSERT_MSG( font.Ok(), _T("invalid font in wxDC::GetTextExtent") );
hfontOld = (HFONT)::SelectObject(dc, hFont);
}
else // don't change the font
{
hfontOld = 0;
}
SIZE sizeRect;
const size_t len = str.length();
if ( !::GetTextExtentPoint32(dc, str, len, &sizeRect) )
{
wxLogLastError(_T("GetTextExtentPoint32()"));
}
#if !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
// the result computed by GetTextExtentPoint32() may be too small as it
// accounts for under/overhang of the first/last character while we want
// just the bounding rect for this string so adjust the width as needed
// (using API not available in 2002 SDKs of WinCE)
if ( len > 1 )
{
ABC width;
const wxChar chFirst = *str.begin();
if ( ::GetCharABCWidths(dc, chFirst, chFirst, &width) )
{
if ( width.abcA < 0 )
sizeRect.cx -= width.abcA;
if ( len > 1 )
{
const wxChar chLast = *str.rbegin();
::GetCharABCWidths(dc, chLast, chLast, &width);
}
//else: we already have the width of the last character
if ( width.abcC < 0 )
sizeRect.cx -= width.abcC;
}
//else: GetCharABCWidths() failed, not a TrueType font?
}
#endif // !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
TEXTMETRIC tm;
::GetTextMetrics(dc, &tm);
if (width)
*width = sizeRect.cx;
if (height)
*height = sizeRect.cy;
if (descent)
*descent = tm.tmDescent;
if (externalLeading)
*externalLeading = tm.tmExternalLeading;
if ( hfontOld )
{
::SelectObject(dc, hfontOld);
}
ReleaseDC(0, dc);
}
|
