1 // Copyright 2016 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 "core/fpdfapi/font/cpdf_type3char.h" 8 9 #include <utility> 10 11 #include "core/fpdfapi/page/cpdf_form.h" 12 #include "core/fpdfapi/page/cpdf_image.h" 13 #include "core/fpdfapi/page/cpdf_imageobject.h" 14 #include "core/fpdfapi/page/cpdf_pageobject.h" 15 #include "core/fxge/dib/cfx_dibitmap.h" 16 #include "core/fxge/fx_dib.h" 17 18 namespace { 19 20 constexpr float kTextUnitInGlyphUnit = 1000.0f; 21 22 } // namespace 23 CPDF_Type3Char(std::unique_ptr<CPDF_Form> pForm)24CPDF_Type3Char::CPDF_Type3Char(std::unique_ptr<CPDF_Form> pForm) 25 : m_pForm(std::move(pForm)) {} 26 ~CPDF_Type3Char()27CPDF_Type3Char::~CPDF_Type3Char() {} 28 29 // static TextUnitToGlyphUnit(float fTextUnit)30float CPDF_Type3Char::TextUnitToGlyphUnit(float fTextUnit) { 31 return fTextUnit * kTextUnitInGlyphUnit; 32 } 33 34 // static TextUnitRectToGlyphUnitRect(CFX_FloatRect * pRect)35void CPDF_Type3Char::TextUnitRectToGlyphUnitRect(CFX_FloatRect* pRect) { 36 pRect->Scale(kTextUnitInGlyphUnit); 37 } 38 LoadBitmap(CPDF_RenderContext * pContext)39bool CPDF_Type3Char::LoadBitmap(CPDF_RenderContext* pContext) { 40 if (m_pBitmap || !m_pForm) 41 return true; 42 43 if (m_pForm->GetPageObjectList()->size() != 1 || m_bColored) 44 return false; 45 46 auto& pPageObj = m_pForm->GetPageObjectList()->front(); 47 if (!pPageObj->IsImage()) 48 return false; 49 50 m_ImageMatrix = pPageObj->AsImage()->matrix(); 51 { 52 // |pSource| actually gets assigned a CPDF_DIBSource, which has pointers 53 // into objects owned by |m_pForm|. Make sure it is out of scope before 54 // clearing the form. 55 RetainPtr<CFX_DIBSource> pSource = 56 pPageObj->AsImage()->GetImage()->LoadDIBSource(); 57 58 // Clone() is non-virtual, and can't be overloaded by CPDF_DIBSource to 59 // return a clone of the subclass as one would typically expect from a 60 // such a method. Instead, it only clones the CFX_DIBSource, none of whose 61 // members point to objects owned by the form. As a result, |m_pBitmap| 62 // may outlive |m_pForm|. 63 if (pSource) 64 m_pBitmap = pSource->Clone(nullptr); 65 } 66 m_pForm.reset(); 67 return true; 68 } 69 InitializeFromStreamData(bool bColored,const float * pData)70void CPDF_Type3Char::InitializeFromStreamData(bool bColored, 71 const float* pData) { 72 m_bColored = bColored; 73 m_Width = FXSYS_round(TextUnitToGlyphUnit(pData[0])); 74 m_BBox.left = FXSYS_round(TextUnitToGlyphUnit(pData[2])); 75 m_BBox.bottom = FXSYS_round(TextUnitToGlyphUnit(pData[3])); 76 m_BBox.right = FXSYS_round(TextUnitToGlyphUnit(pData[4])); 77 m_BBox.top = FXSYS_round(TextUnitToGlyphUnit(pData[5])); 78 } 79 Transform(const CFX_Matrix & matrix)80void CPDF_Type3Char::Transform(const CFX_Matrix& matrix) { 81 m_Width = m_Width * matrix.GetXUnit() + 0.5f; 82 83 CFX_FloatRect char_rect; 84 if (m_BBox.right <= m_BBox.left || m_BBox.bottom >= m_BBox.top) { 85 char_rect = form()->CalcBoundingBox(); 86 TextUnitRectToGlyphUnitRect(&char_rect); 87 } else { 88 char_rect = CFX_FloatRect(m_BBox); 89 } 90 91 m_BBox = matrix.TransformRect(char_rect).ToRoundedFxRect(); 92 } 93 ResetForm()94void CPDF_Type3Char::ResetForm() { 95 m_pForm.reset(); 96 } 97 GetBitmap()98RetainPtr<CFX_DIBitmap> CPDF_Type3Char::GetBitmap() { 99 return m_pBitmap; 100 } 101 GetBitmap() const102const RetainPtr<CFX_DIBitmap>& CPDF_Type3Char::GetBitmap() const { 103 return m_pBitmap; 104 } 105