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// 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);
}