| // Copyright 2016 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 "core/fpdfapi/font/cpdf_type3char.h" |
| |
| #include <utility> |
| |
| #include "core/fpdfapi/page/cpdf_form.h" |
| #include "core/fpdfapi/page/cpdf_image.h" |
| #include "core/fpdfapi/page/cpdf_imageobject.h" |
| #include "core/fpdfapi/page/cpdf_pageobject.h" |
| #include "core/fxge/dib/cfx_dibitmap.h" |
| #include "core/fxge/fx_dib.h" |
| |
| namespace { |
| |
| constexpr float kTextUnitInGlyphUnit = 1000.0f; |
| |
| } // namespace |
| |
| CPDF_Type3Char::CPDF_Type3Char(std::unique_ptr<CPDF_Form> pForm) |
| : m_pForm(std::move(pForm)) {} |
| |
| CPDF_Type3Char::~CPDF_Type3Char() {} |
| |
| // static |
| float CPDF_Type3Char::TextUnitToGlyphUnit(float fTextUnit) { |
| return fTextUnit * kTextUnitInGlyphUnit; |
| } |
| |
| // static |
| void CPDF_Type3Char::TextUnitRectToGlyphUnitRect(CFX_FloatRect* pRect) { |
| pRect->Scale(kTextUnitInGlyphUnit); |
| } |
| |
| bool CPDF_Type3Char::LoadBitmap(CPDF_RenderContext* pContext) { |
| if (m_pBitmap || !m_pForm) |
| return true; |
| |
| if (m_pForm->GetPageObjectList()->size() != 1 || m_bColored) |
| return false; |
| |
| auto& pPageObj = m_pForm->GetPageObjectList()->front(); |
| if (!pPageObj->IsImage()) |
| return false; |
| |
| m_ImageMatrix = pPageObj->AsImage()->matrix(); |
| { |
| // |pSource| actually gets assigned a CPDF_DIBSource, which has pointers |
| // into objects owned by |m_pForm|. Make sure it is out of scope before |
| // clearing the form. |
| RetainPtr<CFX_DIBSource> pSource = |
| pPageObj->AsImage()->GetImage()->LoadDIBSource(); |
| |
| // Clone() is non-virtual, and can't be overloaded by CPDF_DIBSource to |
| // return a clone of the subclass as one would typically expect from a |
| // such a method. Instead, it only clones the CFX_DIBSource, none of whose |
| // members point to objects owned by the form. As a result, |m_pBitmap| |
| // may outlive |m_pForm|. |
| if (pSource) |
| m_pBitmap = pSource->Clone(nullptr); |
| } |
| m_pForm.reset(); |
| return true; |
| } |
| |
| void CPDF_Type3Char::InitializeFromStreamData(bool bColored, |
| const float* pData) { |
| m_bColored = bColored; |
| m_Width = FXSYS_round(TextUnitToGlyphUnit(pData[0])); |
| m_BBox.left = FXSYS_round(TextUnitToGlyphUnit(pData[2])); |
| m_BBox.bottom = FXSYS_round(TextUnitToGlyphUnit(pData[3])); |
| m_BBox.right = FXSYS_round(TextUnitToGlyphUnit(pData[4])); |
| m_BBox.top = FXSYS_round(TextUnitToGlyphUnit(pData[5])); |
| } |
| |
| void CPDF_Type3Char::Transform(const CFX_Matrix& matrix) { |
| m_Width = m_Width * matrix.GetXUnit() + 0.5f; |
| |
| CFX_FloatRect char_rect; |
| if (m_BBox.right <= m_BBox.left || m_BBox.bottom >= m_BBox.top) { |
| char_rect = form()->CalcBoundingBox(); |
| TextUnitRectToGlyphUnitRect(&char_rect); |
| } else { |
| char_rect = CFX_FloatRect(m_BBox); |
| } |
| |
| m_BBox = matrix.TransformRect(char_rect).ToRoundedFxRect(); |
| } |
| |
| void CPDF_Type3Char::ResetForm() { |
| m_pForm.reset(); |
| } |
| |
| RetainPtr<CFX_DIBitmap> CPDF_Type3Char::GetBitmap() { |
| return m_pBitmap; |
| } |
| |
| const RetainPtr<CFX_DIBitmap>& CPDF_Type3Char::GetBitmap() const { |
| return m_pBitmap; |
| } |