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
|
// Copyright 2014 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 <algorithm>
#include <limits>
#include <vector>
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxge/cfx_pathdata.h"
#include "core/fxge/fx_freetype.h"
#include "core/fxge/ifx_renderdevicedriver.h"
namespace {
void ResetTransform(FT_Face face) {
FXFT_Matrix matrix;
matrix.xx = 0x10000L;
matrix.xy = 0;
matrix.yx = 0;
matrix.yy = 0x10000L;
FXFT_Set_Transform(face, &matrix, 0);
}
} // namespace
FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS() : m_pGlyph(nullptr) {}
FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS(const FXTEXT_GLYPHPOS&) = default;
FXTEXT_GLYPHPOS::~FXTEXT_GLYPHPOS(){};
ScopedFontTransform::ScopedFontTransform(FT_Face face, FXFT_Matrix* matrix)
: m_Face(face) {
FXFT_Set_Transform(m_Face, matrix, 0);
}
ScopedFontTransform::~ScopedFontTransform() {
ResetTransform(m_Face);
}
FX_RECT FXGE_GetGlyphsBBox(const std::vector<FXTEXT_GLYPHPOS>& glyphs,
int anti_alias,
float retinaScaleX,
float retinaScaleY) {
FX_RECT rect(0, 0, 0, 0);
bool bStarted = false;
for (const FXTEXT_GLYPHPOS& glyph : glyphs) {
const CFX_GlyphBitmap* pGlyph = glyph.m_pGlyph;
if (!pGlyph)
continue;
FX_SAFE_INT32 char_left = glyph.m_Origin.x;
char_left += pGlyph->m_Left;
if (!char_left.IsValid())
continue;
FX_SAFE_INT32 char_width = pGlyph->m_pBitmap->GetWidth();
char_width /= retinaScaleX;
if (anti_alias == FXFT_RENDER_MODE_LCD)
char_width /= 3;
if (!char_width.IsValid())
continue;
FX_SAFE_INT32 char_right = char_left + char_width;
if (!char_right.IsValid())
continue;
FX_SAFE_INT32 char_top = glyph.m_Origin.y;
char_top -= pGlyph->m_Top;
if (!char_top.IsValid())
continue;
FX_SAFE_INT32 char_height = pGlyph->m_pBitmap->GetHeight();
char_height /= retinaScaleY;
if (!char_height.IsValid())
continue;
FX_SAFE_INT32 char_bottom = char_top + char_height;
if (!char_bottom.IsValid())
continue;
if (bStarted) {
rect.left = pdfium::base::ValueOrDieForType<int32_t>(
pdfium::base::CheckMin(rect.left, char_left));
rect.right = pdfium::base::ValueOrDieForType<int32_t>(
pdfium::base::CheckMax(rect.right, char_right));
rect.top = pdfium::base::ValueOrDieForType<int32_t>(
pdfium::base::CheckMin(rect.top, char_top));
rect.bottom = pdfium::base::ValueOrDieForType<int32_t>(
pdfium::base::CheckMax(rect.bottom, char_bottom));
continue;
}
rect.left = char_left.ValueOrDie();
rect.right = char_right.ValueOrDie();
rect.top = char_top.ValueOrDie();
rect.bottom = char_bottom.ValueOrDie();
bStarted = true;
}
return rect;
}
|
