| // 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/page/cpdf_imageobject.h" |
| |
| #include <memory> |
| |
| #include "core/fpdfapi/page/cpdf_docpagedata.h" |
| #include "core/fpdfapi/page/cpdf_image.h" |
| #include "core/fpdfapi/parser/cpdf_document.h" |
| #include "core/fpdfapi/parser/cpdf_stream.h" |
| #include "core/fxge/dib/cfx_dibbase.h" |
| #include "core/fxge/dib/cfx_dibitmap.h" |
| |
| CPDF_ImageObject::CPDF_ImageObject(int32_t content_stream) |
| : CPDF_PageObject(content_stream) {} |
| |
| CPDF_ImageObject::CPDF_ImageObject() : CPDF_ImageObject(kNoContentStream) {} |
| |
| CPDF_ImageObject::~CPDF_ImageObject() { |
| MaybePurgeCache(); |
| } |
| |
| CPDF_PageObject::Type CPDF_ImageObject::GetType() const { |
| return IMAGE; |
| } |
| |
| void CPDF_ImageObject::Transform(const CFX_Matrix& matrix) { |
| m_Matrix.Concat(matrix); |
| CalcBoundingBox(); |
| SetDirty(true); |
| } |
| |
| bool CPDF_ImageObject::IsImage() const { |
| return true; |
| } |
| |
| CPDF_ImageObject* CPDF_ImageObject::AsImage() { |
| return this; |
| } |
| |
| const CPDF_ImageObject* CPDF_ImageObject::AsImage() const { |
| return this; |
| } |
| |
| void CPDF_ImageObject::CalcBoundingBox() { |
| static constexpr CFX_FloatRect kRect(0.0f, 0.0f, 1.0f, 1.0f); |
| SetRect(m_Matrix.TransformRect(kRect)); |
| } |
| |
| void CPDF_ImageObject::SetImage(const RetainPtr<CPDF_Image>& pImage) { |
| MaybePurgeCache(); |
| m_pImage = pImage; |
| } |
| |
| RetainPtr<CPDF_Image> CPDF_ImageObject::GetImage() const { |
| return m_pImage; |
| } |
| |
| RetainPtr<CFX_DIBitmap> CPDF_ImageObject::GetIndependentBitmap() const { |
| RetainPtr<CFX_DIBBase> pSource = GetImage()->LoadDIBBase(); |
| |
| // Clone() is non-virtual, and can't be overloaded by CPDF_DIBBase to |
| // return a clone of the subclass as one would typically expect from a |
| // such a method. Instead, it only clones the CFX_DIBBase, none of whose |
| // members point to objects owned by |this| or the form containing |this|. |
| // As a result, the clone may outlive them. |
| return pSource ? pSource->Clone(nullptr) : nullptr; |
| } |
| |
| void CPDF_ImageObject::MaybePurgeCache() { |
| if (!m_pImage) |
| return; |
| |
| auto* pPageData = CPDF_DocPageData::FromDocument(m_pImage->GetDocument()); |
| if (!pPageData) |
| return; |
| |
| CPDF_Stream* pStream = m_pImage->GetStream(); |
| if (!pStream) |
| return; |
| |
| uint32_t objnum = pStream->GetObjNum(); |
| if (!objnum) |
| return; |
| |
| m_pImage.Reset(); // Clear my reference before asking the cache. |
| pPageData->MaybePurgeImage(objnum); |
| } |