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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"
CPDF_ImageObject::CPDF_ImageObject() {}
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() {
std::tie(m_Left, m_Right, m_Top, m_Bottom) =
m_Matrix.TransformRect(0.f, 1.f, 1.f, 0.f);
}
void CPDF_ImageObject::SetImage(const RetainPtr<CPDF_Image>& pImage) {
MaybePurgeCache();
m_pImage = pImage;
}
void CPDF_ImageObject::MaybePurgeCache() {
if (!m_pImage)
return;
CPDF_Document* pDocument = m_pImage->GetDocument();
if (!pDocument)
return;
CPDF_DocPageData* pPageData = pDocument->GetPageData();
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);
}