| /**************************************************************************** |
| ** |
| ** Copyright (C) 2017 The Qt Company Ltd. |
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| ** |
| ** This file is part of the QtWebEngine module of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** General Public License version 3 as published by the Free Software |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #include "pdfium_document_wrapper_qt.h" |
| #include <QtCore/qhash.h> |
| #include <QtGui/qimage.h> |
| #include <QtGui/qpainter.h> |
| |
| #include "third_party/pdfium/public/fpdf_doc.h" |
| #include "third_party/pdfium/public/fpdfview.h" |
| |
| namespace QtWebEngineCore { |
| int PdfiumDocumentWrapperQt::m_libraryUsers = 0; |
| |
| PdfiumDocumentWrapperQt::PdfiumDocumentWrapperQt(const void *pdfData, size_t size, |
| const char *password) |
| { |
| Q_ASSERT(pdfData); |
| Q_ASSERT(size); |
| if (m_libraryUsers++ == 0) |
| FPDF_InitLibrary(); |
| |
| m_documentHandle = (void *)FPDF_LoadMemDocument(pdfData, static_cast<int>(size), password); |
| m_pageCount = FPDF_GetPageCount((FPDF_DOCUMENT)m_documentHandle); |
| } |
| |
| QImage PdfiumDocumentWrapperQt::pageAsQImage(size_t pageIndex,int width , int height) |
| { |
| if (!m_documentHandle || !m_pageCount) { |
| qWarning("Failure to generate QImage from invalid or empty PDF document."); |
| return QImage(); |
| } |
| |
| if (static_cast<int>(pageIndex) >= m_pageCount) { |
| qWarning("Failure to generate QImage from PDF data: index out of bounds."); |
| return QImage(); |
| } |
| |
| FPDF_PAGE pageData(FPDF_LoadPage((FPDF_DOCUMENT)m_documentHandle, pageIndex)); |
| QImage image(width, height, QImage::Format_ARGB32); |
| Q_ASSERT(!image.isNull()); |
| image.fill(0xFFFFFFFF); |
| |
| FPDF_BITMAP bitmap = FPDFBitmap_CreateEx(width, height, |
| FPDFBitmap_BGRA, |
| image.scanLine(0), image.bytesPerLine()); |
| Q_ASSERT(bitmap); |
| FPDF_RenderPageBitmap(bitmap, pageData, |
| 0, 0, width, height, |
| 0, 0); |
| FPDFBitmap_Destroy(bitmap); |
| bitmap = nullptr; |
| FPDF_ClosePage(pageData); |
| return image; |
| } |
| |
| QSizeF PdfiumDocumentWrapperQt::pageSize(size_t index) |
| { |
| QSizeF size; |
| FPDF_GetPageSizeByIndex((FPDF_DOCUMENT)m_documentHandle, index, &size.rwidth(), &size.rheight()); |
| return size; |
| } |
| |
| PdfiumDocumentWrapperQt::~PdfiumDocumentWrapperQt() |
| { |
| FPDF_CloseDocument((FPDF_DOCUMENT)m_documentHandle); |
| if (--m_libraryUsers == 0) |
| FPDF_DestroyLibrary(); |
| } |
| } |