1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include <algorithm>
8 #include <limits>
9 #include <vector>
10
11 #include "core/fxcodec/fx_codec.h"
12 #include "core/fxcrt/fx_safe_types.h"
13 #include "core/fxge/cfx_pathdata.h"
14 #include "core/fxge/fx_freetype.h"
15 #include "core/fxge/ge/fx_text_int.h"
16 #include "core/fxge/ifx_renderdevicedriver.h"
17
18 namespace {
19
ResetTransform(FT_Face face)20 void ResetTransform(FT_Face face) {
21 FXFT_Matrix matrix;
22 matrix.xx = 0x10000L;
23 matrix.xy = 0;
24 matrix.yx = 0;
25 matrix.yy = 0x10000L;
26 FXFT_Set_Transform(face, &matrix, 0);
27 }
28
29 } // namespace
30
FXTEXT_GLYPHPOS()31 FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS() : m_pGlyph(nullptr) {}
32
33 FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS(const FXTEXT_GLYPHPOS&) = default;
34
~FXTEXT_GLYPHPOS()35 FXTEXT_GLYPHPOS::~FXTEXT_GLYPHPOS(){};
36
ScopedFontTransform(FT_Face face,FXFT_Matrix * matrix)37 ScopedFontTransform::ScopedFontTransform(FT_Face face, FXFT_Matrix* matrix)
38 : m_Face(face) {
39 FXFT_Set_Transform(m_Face, matrix, 0);
40 }
41
~ScopedFontTransform()42 ScopedFontTransform::~ScopedFontTransform() {
43 ResetTransform(m_Face);
44 }
45
FXGE_GetGlyphsBBox(const std::vector<FXTEXT_GLYPHPOS> & glyphs,int anti_alias,FX_FLOAT retinaScaleX,FX_FLOAT retinaScaleY)46 FX_RECT FXGE_GetGlyphsBBox(const std::vector<FXTEXT_GLYPHPOS>& glyphs,
47 int anti_alias,
48 FX_FLOAT retinaScaleX,
49 FX_FLOAT retinaScaleY) {
50 FX_RECT rect(0, 0, 0, 0);
51 bool bStarted = false;
52 for (const FXTEXT_GLYPHPOS& glyph : glyphs) {
53 const CFX_GlyphBitmap* pGlyph = glyph.m_pGlyph;
54 if (!pGlyph)
55 continue;
56
57 FX_SAFE_INT32 char_left = glyph.m_Origin.x;
58 char_left += pGlyph->m_Left;
59 if (!char_left.IsValid())
60 continue;
61
62 FX_SAFE_INT32 char_width = pGlyph->m_Bitmap.GetWidth();
63 char_width /= retinaScaleX;
64 if (anti_alias == FXFT_RENDER_MODE_LCD)
65 char_width /= 3;
66 if (!char_width.IsValid())
67 continue;
68
69 FX_SAFE_INT32 char_right = char_left + char_width;
70 if (!char_right.IsValid())
71 continue;
72
73 FX_SAFE_INT32 char_top = glyph.m_Origin.y;
74 char_top -= pGlyph->m_Top;
75 if (!char_top.IsValid())
76 continue;
77
78 FX_SAFE_INT32 char_height = pGlyph->m_Bitmap.GetHeight();
79 char_height /= retinaScaleY;
80 if (!char_height.IsValid())
81 continue;
82
83 FX_SAFE_INT32 char_bottom = char_top + char_height;
84 if (!char_bottom.IsValid())
85 continue;
86
87 if (bStarted) {
88 rect.left = pdfium::base::ValueOrDieForType<int32_t>(
89 pdfium::base::CheckMin(rect.left, char_left));
90 rect.right = pdfium::base::ValueOrDieForType<int32_t>(
91 pdfium::base::CheckMax(rect.right, char_right));
92 rect.top = pdfium::base::ValueOrDieForType<int32_t>(
93 pdfium::base::CheckMin(rect.top, char_top));
94 rect.bottom = pdfium::base::ValueOrDieForType<int32_t>(
95 pdfium::base::CheckMax(rect.bottom, char_bottom));
96 continue;
97 }
98
99 rect.left = char_left.ValueOrDie();
100 rect.right = char_right.ValueOrDie();
101 rect.top = char_top.ValueOrDie();
102 rect.bottom = char_bottom.ValueOrDie();
103 bStarted = true;
104 }
105 return rect;
106 }
107
CFX_SizeGlyphCache()108 CFX_SizeGlyphCache::CFX_SizeGlyphCache() {}
109
~CFX_SizeGlyphCache()110 CFX_SizeGlyphCache::~CFX_SizeGlyphCache() {
111 for (const auto& pair : m_GlyphMap) {
112 delete pair.second;
113 }
114 m_GlyphMap.clear();
115 }
116
Generate(int count,...)117 void _CFX_UniqueKeyGen::Generate(int count, ...) {
118 va_list argList;
119 va_start(argList, count);
120 for (int i = 0; i < count; i++) {
121 int p = va_arg(argList, int);
122 ((uint32_t*)m_Key)[i] = p;
123 }
124 va_end(argList);
125 m_KeyLen = count * sizeof(uint32_t);
126 }
127