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
18namespace {
19
20constexpr float kTextUnitInGlyphUnit = 1000.0f;
21
22}  // namespace
23
24CPDF_Type3Char::CPDF_Type3Char(std::unique_ptr<CPDF_Form> pForm)
25    : m_pForm(std::move(pForm)) {}
26
27CPDF_Type3Char::~CPDF_Type3Char() {}
28
29// static
30float CPDF_Type3Char::TextUnitToGlyphUnit(float fTextUnit) {
31  return fTextUnit * kTextUnitInGlyphUnit;
32}
33
34// static
35void CPDF_Type3Char::TextUnitRectToGlyphUnitRect(CFX_FloatRect* pRect) {
36  pRect->Scale(kTextUnitInGlyphUnit);
37}
38
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
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
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
94void CPDF_Type3Char::ResetForm() {
95  m_pForm.reset();
96}
97
98RetainPtr<CFX_DIBitmap> CPDF_Type3Char::GetBitmap() {
99  return m_pBitmap;
100}
101
102const RetainPtr<CFX_DIBitmap>& CPDF_Type3Char::GetBitmap() const {
103  return m_pBitmap;
104}
105