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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#include <config_features.h>
#if HAVE_FEATURE_PDFIUM
#include <vcl/filter/PDFiumLibrary.hxx>
#include <fpdf_doc.h>
#include <vcl/bitmap.hxx>
#include <bitmapwriteaccess.hxx>
namespace vcl::pdf
{
PDFium::PDFium()
{
FPDF_LIBRARY_CONFIG aConfig;
aConfig.version = 2;
aConfig.m_pUserFontPaths = nullptr;
aConfig.m_pIsolate = nullptr;
aConfig.m_v8EmbedderSlot = 0;
FPDF_InitLibraryWithConfig(&aConfig);
}
PDFium::~PDFium() { FPDF_DestroyLibrary(); }
PDFiumDocument::PDFiumDocument(FPDF_DOCUMENT pPdfDocument)
: mpPdfDocument(pPdfDocument)
{
}
PDFiumDocument::~PDFiumDocument()
{
if (mpPdfDocument)
FPDF_CloseDocument(mpPdfDocument);
}
std::unique_ptr<PDFiumPage> PDFiumDocument::openPage(int nIndex)
{
std::unique_ptr<PDFiumPage> pPDFiumPage;
FPDF_PAGE pPage = FPDF_LoadPage(mpPdfDocument, nIndex);
if (pPage)
{
pPDFiumPage = std::make_unique<PDFiumPage>(pPage);
}
return pPDFiumPage;
}
int PDFiumDocument::getPageCount() { return FPDF_GetPageCount(mpPdfDocument); }
BitmapChecksum PDFiumPage::getChecksum(int nMDPPerm)
{
size_t nPageWidth = FPDF_GetPageWidth(mpPage);
size_t nPageHeight = FPDF_GetPageHeight(mpPage);
FPDF_BITMAP pPdfBitmap = FPDFBitmap_Create(nPageWidth, nPageHeight, /*alpha=*/1);
if (!pPdfBitmap)
{
return 0;
}
int nFlags = 0;
if (nMDPPerm != 3)
{
// Annotations/commenting should affect the checksum, signature verification wants this.
nFlags = FPDF_ANNOT;
}
FPDF_RenderPageBitmap(pPdfBitmap, mpPage, /*start_x=*/0, /*start_y=*/0, nPageWidth, nPageHeight,
/*rotate=*/0, nFlags);
Bitmap aBitmap(Size(nPageWidth, nPageHeight), 24);
{
BitmapScopedWriteAccess pWriteAccess(aBitmap);
const auto pPdfBuffer = static_cast<ConstScanline>(FPDFBitmap_GetBuffer(pPdfBitmap));
const int nStride = FPDFBitmap_GetStride(pPdfBitmap);
for (size_t nRow = 0; nRow < nPageHeight; ++nRow)
{
ConstScanline pPdfLine = pPdfBuffer + (nStride * nRow);
pWriteAccess->CopyScanline(nRow, pPdfLine, ScanlineFormat::N32BitTcBgra, nStride);
}
}
return aBitmap.GetChecksum();
}
} // end vcl::pdf
#endif // HAVE_FEATURE_PDFIUM
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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