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 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 31 FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS() : m_pGlyph(nullptr) {} 32 33 FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS(const FXTEXT_GLYPHPOS&) = default; 34 35 FXTEXT_GLYPHPOS::~FXTEXT_GLYPHPOS(){}; 36 37 ScopedFontTransform::ScopedFontTransform(FT_Face face, FXFT_Matrix* matrix) 38 : m_Face(face) { 39 FXFT_Set_Transform(m_Face, matrix, 0); 40 } 41 42 ScopedFontTransform::~ScopedFontTransform() { 43 ResetTransform(m_Face); 44 } 45 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 } 107 108 CFX_SizeGlyphCache::CFX_SizeGlyphCache() {} 109 110 CFX_SizeGlyphCache::~CFX_SizeGlyphCache() { 111 for (const auto& pair : m_GlyphMap) { 112 delete pair.second; 113 } 114 m_GlyphMap.clear(); 115 } 116 117 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
