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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 "pdfread.hxx"
#include <config_features.h>
#if HAVE_FEATURE_PDFIUM
#include <fpdfview.h>
#include <fpdf_edit.h>
#endif
#include <vcl/bitmapaccess.hxx>
using namespace com::sun::star;
namespace
{
#if HAVE_FEATURE_PDFIUM
/// Convert to inch, then assume 96 DPI.
double pointToPixel(double fPoint)
{
return fPoint / 72 * 96;
}
/// Does PDF to bitmap conversion using pdfium.
bool generatePreview(SvStream& rStream, Graphic& rGraphic)
{
FPDF_LIBRARY_CONFIG aConfig;
aConfig.version = 2;
aConfig.m_pUserFontPaths = nullptr;
aConfig.m_pIsolate = nullptr;
aConfig.m_v8EmbedderSlot = 0;
FPDF_InitLibraryWithConfig(&aConfig);
// Read input into a buffer.
SvMemoryStream aInBuffer;
aInBuffer.WriteStream(rStream);
// Load the buffer using pdfium.
FPDF_DOCUMENT pPdfDocument = FPDF_LoadMemDocument(aInBuffer.GetData(), aInBuffer.GetSize(), /*password=*/nullptr);
if (!pPdfDocument)
return false;
// Render the first page.
FPDF_PAGE pPdfPage = FPDF_LoadPage(pPdfDocument, /*page_index=*/0);
if (!pPdfPage)
return false;
// Returned unit is points, convert that to pixel.
size_t nPageWidth = pointToPixel(FPDF_GetPageWidth(pPdfPage));
size_t nPageHeight = pointToPixel(FPDF_GetPageHeight(pPdfPage));
FPDF_BITMAP pPdfBitmap = FPDFBitmap_Create(nPageWidth, nPageHeight, /*alpha=*/1);
if (!pPdfBitmap)
return false;
FPDF_DWORD nColor = FPDFPage_HasTransparency(pPdfPage) ? 0x00000000 : 0xFFFFFFFF;
FPDFBitmap_FillRect(pPdfBitmap, 0, 0, nPageWidth, nPageHeight, nColor);
FPDF_RenderPageBitmap(pPdfBitmap, pPdfPage, /*start_x=*/0, /*start_y=*/0, nPageWidth, nPageHeight, /*rotate=*/0, /*flags=*/0);
// Save the buffer as a bitmap.
Bitmap aBitmap(Size(nPageWidth, nPageHeight), 24);
{
Bitmap::ScopedWriteAccess pWriteAccess(aBitmap);
auto pPdfBuffer = static_cast<ConstScanline>(FPDFBitmap_GetBuffer(pPdfBitmap));
for (size_t nRow = 0; nRow < nPageHeight; ++nRow)
{
int nStride = FPDFBitmap_GetStride(pPdfBitmap);
ConstScanline pPdfLine = pPdfBuffer + (nStride * nRow);
// pdfium byte order is BGRA.
pWriteAccess->CopyScanline(nRow, pPdfLine, ScanlineFormat::N32BitTcBgra, nStride);
}
}
rGraphic = aBitmap;
FPDFBitmap_Destroy(pPdfBitmap);
FPDF_ClosePage(pPdfPage);
FPDF_CloseDocument(pPdfDocument);
FPDF_DestroyLibrary();
return true;
}
#else
bool generatePreview(SvStream& rStream, Graphic& rGraphic)
{
(void)rStream;
(void)rGraphic;
return true;
}
#endif // HAVE_FEATURE_PDFIUM
}
namespace vcl
{
bool ImportPDF(SvStream& rStream, Graphic& rGraphic)
{
// Get the preview of the first page.
if (!generatePreview(rStream, rGraphic))
return false;
// Save the original PDF stream for later use.
rStream.Seek(STREAM_SEEK_TO_END);
uno::Sequence<sal_Int8> aPdfData(rStream.Tell());
rStream.Seek(STREAM_SEEK_TO_BEGIN);
rStream.ReadBytes(aPdfData.getArray(), aPdfData.getLength());
rGraphic.setPdfData(aPdfData);
return true;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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