зеркало из https://github.com/mozilla/gecko-dev.git
164 строки
4.0 KiB
C++
164 строки
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "PDFiumEngineShim.h"
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namespace mozilla {
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namespace widget {
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static PDFiumEngineShim* sPDFiumEngineShim;
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/* static */
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already_AddRefed<PDFiumEngineShim>
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PDFiumEngineShim::GetInstanceOrNull()
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{
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RefPtr<PDFiumEngineShim> inst = sPDFiumEngineShim;
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if (!inst) {
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inst = new PDFiumEngineShim();
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if (!inst->Init(nsCString("pdfium.dll"))) {
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inst = nullptr;
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}
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sPDFiumEngineShim = inst.get();
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}
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return inst.forget();
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}
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/* static */
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already_AddRefed<PDFiumEngineShim>
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PDFiumEngineShim::GetInstanceOrNull(const nsCString& aLibrary)
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{
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RefPtr<PDFiumEngineShim> shim = new PDFiumEngineShim();
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if (!shim->Init(aLibrary)) {
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return nullptr;
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}
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return shim.forget();
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}
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PDFiumEngineShim::PDFiumEngineShim()
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: mInitialized(false)
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, mFPDF_InitLibrary(nullptr)
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, mFPDF_DestroyLibrary(nullptr)
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, mFPDF_CloseDocument(nullptr)
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, mFPDF_GetPageCount(nullptr)
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, mFPDF_LoadPage(nullptr)
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, mFPDF_ClosePage(nullptr)
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, mFPDF_RenderPage(nullptr)
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, mPRLibrary(nullptr)
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{
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}
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PDFiumEngineShim::~PDFiumEngineShim()
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{
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if (mInitialized) {
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mFPDF_DestroyLibrary();
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}
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sPDFiumEngineShim = nullptr;
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if (mPRLibrary) {
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PR_UnloadLibrary(mPRLibrary);
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}
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}
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bool
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PDFiumEngineShim::Init(const nsCString& aLibrary)
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{
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if (mInitialized) {
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return true;
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}
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mPRLibrary = PR_LoadLibrary(aLibrary.get());
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NS_ENSURE_TRUE(mPRLibrary, false);
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mFPDF_InitLibrary = (FPDF_InitLibrary_Pfn)PR_FindFunctionSymbol(
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mPRLibrary, "FPDF_InitLibrary");
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NS_ENSURE_TRUE(mFPDF_InitLibrary, false);
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mFPDF_DestroyLibrary = (FPDF_DestroyLibrary_Pfn)PR_FindFunctionSymbol(
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mPRLibrary, "FPDF_DestroyLibrary");
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NS_ENSURE_TRUE(mFPDF_DestroyLibrary, false);
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mFPDF_LoadDocument = (FPDF_LoadDocument_Pfn)PR_FindFunctionSymbol(
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mPRLibrary, "FPDF_LoadDocument");
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NS_ENSURE_TRUE(mFPDF_LoadDocument, false);
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mFPDF_CloseDocument = (FPDF_CloseDocument_Pfn)PR_FindFunctionSymbol(
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mPRLibrary, "FPDF_CloseDocument");
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NS_ENSURE_TRUE(mFPDF_CloseDocument, false);
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mFPDF_GetPageCount = (FPDF_GetPageCount_Pfn)PR_FindFunctionSymbol(
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mPRLibrary, "FPDF_GetPageCount");
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NS_ENSURE_TRUE(mFPDF_GetPageCount, false);
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mFPDF_LoadPage = (FPDF_LoadPage_Pfn)PR_FindFunctionSymbol(
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mPRLibrary, "FPDF_LoadPage");
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NS_ENSURE_TRUE(mFPDF_LoadPage, false);
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mFPDF_ClosePage = (FPDF_ClosePage_Pfn)PR_FindFunctionSymbol(
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mPRLibrary, "FPDF_ClosePage");
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NS_ENSURE_TRUE(mFPDF_ClosePage, false);
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mFPDF_RenderPage = (FPDF_RenderPage_Pfn)PR_FindFunctionSymbol(
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mPRLibrary, "FPDF_RenderPage");
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NS_ENSURE_TRUE(mFPDF_RenderPage, false);
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mFPDF_InitLibrary();
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mInitialized = true;
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return true;
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}
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FPDF_DOCUMENT
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PDFiumEngineShim::LoadDocument(FPDF_STRING file_path,
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FPDF_BYTESTRING aPassword)
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{
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MOZ_ASSERT(mInitialized);
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return mFPDF_LoadDocument(file_path, aPassword);
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}
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void
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PDFiumEngineShim::CloseDocument(FPDF_DOCUMENT aDocument)
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{
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MOZ_ASSERT(mInitialized);
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mFPDF_CloseDocument(aDocument);
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}
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int
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PDFiumEngineShim::GetPageCount(FPDF_DOCUMENT aDocument)
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{
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MOZ_ASSERT(mInitialized);
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return mFPDF_GetPageCount(aDocument);
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}
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FPDF_PAGE
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PDFiumEngineShim::LoadPage(FPDF_DOCUMENT aDocument, int aPageIndex)
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{
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MOZ_ASSERT(mInitialized);
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return mFPDF_LoadPage(aDocument, aPageIndex);
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}
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void
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PDFiumEngineShim::ClosePage(FPDF_PAGE aPage)
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{
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MOZ_ASSERT(mInitialized);
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mFPDF_ClosePage(aPage);
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}
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void
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PDFiumEngineShim::RenderPage(HDC aDC, FPDF_PAGE aPage,
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int aStartX, int aStartY,
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int aSizeX, int aSizeY,
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int aRotate, int aFlags)
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{
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MOZ_ASSERT(mInitialized);
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mFPDF_RenderPage(aDC, aPage, aStartX, aStartY,
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aSizeX, aSizeY, aRotate, aFlags);
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}
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} // namespace widget
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} // namespace mozilla
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