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
|
// Copyright 2016 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxge/android/cfpf_skiafont.h"
#include <algorithm>
#include "core/fxcrt/fx_system.h"
#include "core/fxge/android/cfpf_skiafontmgr.h"
#include "core/fxge/android/cfpf_skiapathfont.h"
#include "core/fxge/fx_freetype.h"
#define FPF_EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em)
CFPF_SkiaFont::CFPF_SkiaFont(CFPF_SkiaFontMgr* pFontMgr,
const CFPF_SkiaPathFont* pFont,
uint32_t dwStyle,
uint8_t uCharset)
: m_pFontMgr(pFontMgr),
m_pFont(pFont),
m_Face(m_pFontMgr->GetFontFace(m_pFont->path(), m_pFont->face_index())),
m_dwStyle(dwStyle),
m_uCharset(uCharset) {}
CFPF_SkiaFont::~CFPF_SkiaFont() {
if (m_Face)
FXFT_Done_Face(m_Face);
}
ByteString CFPF_SkiaFont::GetFamilyName() {
if (!m_Face)
return ByteString();
return ByteString(FXFT_Get_Face_Family_Name(m_Face));
}
ByteString CFPF_SkiaFont::GetPsName() {
if (!m_Face)
return ByteString();
return FXFT_Get_Postscript_Name(m_Face);
}
int32_t CFPF_SkiaFont::GetGlyphIndex(wchar_t wUnicode) {
if (!m_Face)
return wUnicode;
if (FXFT_Select_Charmap(m_Face, FXFT_ENCODING_UNICODE))
return 0;
return FXFT_Get_Char_Index(m_Face, wUnicode);
}
int32_t CFPF_SkiaFont::GetGlyphWidth(int32_t iGlyphIndex) {
if (!m_Face)
return 0;
if (FXFT_Load_Glyph(
m_Face, iGlyphIndex,
FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
return 0;
}
return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Glyph_HoriAdvance(m_Face));
}
int32_t CFPF_SkiaFont::GetAscent() const {
if (!m_Face)
return 0;
return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_Ascender(m_Face));
}
int32_t CFPF_SkiaFont::GetDescent() const {
if (!m_Face)
return 0;
return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_Descender(m_Face));
}
bool CFPF_SkiaFont::GetGlyphBBox(int32_t iGlyphIndex, FX_RECT& rtBBox) {
if (!m_Face)
return false;
if (FXFT_Is_Face_Tricky(m_Face)) {
if (FXFT_Set_Char_Size(m_Face, 0, 1000 * 64, 72, 72))
return false;
if (FXFT_Load_Glyph(m_Face, iGlyphIndex,
FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
return false;
}
FXFT_Glyph glyph;
if (FXFT_Get_Glyph(m_Face->glyph, &glyph)) {
FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
return false;
}
FXFT_BBox cbox;
FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox);
int32_t x_ppem = m_Face->size->metrics.x_ppem;
int32_t y_ppem = m_Face->size->metrics.y_ppem;
rtBBox.left = FPF_EM_ADJUST(x_ppem, cbox.xMin);
rtBBox.right = FPF_EM_ADJUST(x_ppem, cbox.xMax);
rtBBox.top = FPF_EM_ADJUST(y_ppem, cbox.yMax);
rtBBox.bottom = FPF_EM_ADJUST(y_ppem, cbox.yMin);
rtBBox.top = std::min(rtBBox.top, GetAscent());
rtBBox.bottom = std::max(rtBBox.bottom, GetDescent());
FXFT_Done_Glyph(glyph);
return FXFT_Set_Pixel_Sizes(m_Face, 0, 64) == 0;
}
if (FXFT_Load_Glyph(
m_Face, iGlyphIndex,
FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
return false;
}
rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Glyph_HoriBearingX(m_Face));
rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Glyph_HoriBearingY(m_Face));
rtBBox.right = FPF_EM_ADJUST(
FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Glyph_HoriBearingX(m_Face) + FXFT_Get_Glyph_Width(m_Face));
rtBBox.top = FPF_EM_ADJUST(
FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Glyph_HoriBearingY(m_Face) - FXFT_Get_Glyph_Height(m_Face));
return true;
}
bool CFPF_SkiaFont::GetBBox(FX_RECT& rtBBox) {
if (!m_Face) {
return false;
}
rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_xMin(m_Face));
rtBBox.top = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_yMin(m_Face));
rtBBox.right = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_xMax(m_Face));
rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_yMax(m_Face));
return true;
}
int32_t CFPF_SkiaFont::GetHeight() const {
if (!m_Face)
return 0;
return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_Height(m_Face));
}
int32_t CFPF_SkiaFont::GetItalicAngle() const {
if (!m_Face)
return 0;
auto* info =
static_cast<TT_Postscript*>(FT_Get_Sfnt_Table(m_Face, ft_sfnt_post));
return info ? info->italicAngle : 0;
}
uint32_t CFPF_SkiaFont::GetFontData(uint32_t dwTable,
uint8_t* pBuffer,
uint32_t dwSize) {
if (!m_Face)
return 0;
FT_ULong ulSize = pdfium::base::checked_cast<FT_ULong>(dwSize);
if (FXFT_Load_Sfnt_Table(m_Face, dwTable, 0, pBuffer, &ulSize))
return 0;
return pdfium::base::checked_cast<uint32_t>(ulSize);
}
|
