pdfium舍弃v8依赖
Step 3 去除v8依赖
用文本编辑器打开pdfium根目录下的pdfium.gyp文件,找到‘javascript‘及‘jsapi‘依赖(47行左右):
‘dependencies‘: [ ‘safemath‘, ‘fdrm‘, ‘fpdfdoc‘, ‘fpdfapi‘, ‘fpdftext‘, ‘formfiller‘, ‘fxcodec‘, ‘fxcrt‘, ‘fxedit‘, ‘fxge‘, ‘javascript‘, ‘jsapi‘, ‘pdfwindow‘, ],
将其移除并删除对应的工程(734行至812行):
{ ‘target_name‘: ‘javascript‘, ‘type‘: ‘static_library‘, ‘include_dirs‘: [ ‘<(DEPTH)/v8‘, ‘<(DEPTH)/v8/include‘, ], ‘dependencies‘: [ ‘<(DEPTH)/v8/tools/gyp/v8.gyp:v8‘, ‘<(DEPTH)/v8/tools/gyp/v8.gyp:v8_libplatform‘, ], ‘export_dependent_settings‘: [ ‘<(DEPTH)/v8/tools/gyp/v8.gyp:v8‘, ], ‘ldflags‘: [ ‘-L<(PRODUCT_DIR)‘,], ‘sources‘: [ ‘fpdfsdk/include/javascript/app.h‘, ‘fpdfsdk/include/javascript/color.h‘, ‘fpdfsdk/include/javascript/console.h‘, ‘fpdfsdk/include/javascript/Consts.h‘, ‘fpdfsdk/include/javascript/Document.h‘, ‘fpdfsdk/include/javascript/event.h‘, ‘fpdfsdk/include/javascript/Field.h‘, ‘fpdfsdk/include/javascript/global.h‘, ‘fpdfsdk/include/javascript/Icon.h‘, ‘fpdfsdk/include/javascript/IJavaScript.h‘, ‘fpdfsdk/include/javascript/JavaScript.h‘, ‘fpdfsdk/include/javascript/JS_Console.h‘, ‘fpdfsdk/include/javascript/JS_Context.h‘, ‘fpdfsdk/include/javascript/JS_Define.h‘, ‘fpdfsdk/include/javascript/JS_EventHandler.h‘, ‘fpdfsdk/include/javascript/JS_GlobalData.h‘, ‘fpdfsdk/include/javascript/JS_Module.h‘, ‘fpdfsdk/include/javascript/JS_Object.h‘, ‘fpdfsdk/include/javascript/JS_Runtime.h‘, ‘fpdfsdk/include/javascript/JS_Value.h‘, ‘fpdfsdk/include/javascript/PublicMethods.h‘, ‘fpdfsdk/include/javascript/report.h‘, ‘fpdfsdk/include/javascript/resource.h‘, ‘fpdfsdk/include/javascript/util.h‘, ‘fpdfsdk/src/javascript/app.cpp‘, ‘fpdfsdk/src/javascript/color.cpp‘, ‘fpdfsdk/src/javascript/console.cpp‘, ‘fpdfsdk/src/javascript/Consts.cpp‘, ‘fpdfsdk/src/javascript/Document.cpp‘, ‘fpdfsdk/src/javascript/event.cpp‘, ‘fpdfsdk/src/javascript/Field.cpp‘, ‘fpdfsdk/src/javascript/global.cpp‘, ‘fpdfsdk/src/javascript/Icon.cpp‘, ‘fpdfsdk/src/javascript/JS_Context.cpp‘, ‘fpdfsdk/src/javascript/JS_EventHandler.cpp‘, ‘fpdfsdk/src/javascript/JS_GlobalData.cpp‘, ‘fpdfsdk/src/javascript/JS_Object.cpp‘, ‘fpdfsdk/src/javascript/JS_Runtime.cpp‘, ‘fpdfsdk/src/javascript/JS_Value.cpp‘, ‘fpdfsdk/src/javascript/PublicMethods.cpp‘, ‘fpdfsdk/src/javascript/report.cpp‘, ‘fpdfsdk/src/javascript/util.cpp‘, ], }, { ‘target_name‘: ‘jsapi‘, ‘type‘: ‘static_library‘, ‘dependencies‘: [ ‘<(DEPTH)/v8/tools/gyp/v8.gyp:v8‘, ], ‘export_dependent_settings‘: [ ‘<(DEPTH)/v8/tools/gyp/v8.gyp:v8‘, ], ‘include_dirs‘: [ ‘<(DEPTH)/v8‘, ‘<(DEPTH)/v8/include‘, ], ‘ldflags‘: [ ‘-L<(PRODUCT_DIR)‘,], ‘sources‘: [ ‘fpdfsdk/include/jsapi/fxjs_v8.h‘, ‘fpdfsdk/src/jsapi/fxjs_v8.cpp‘, ], },
‘javascript‘是将pdf js规定的对象嵌入到js引擎中,使得PDF引擎使用的js引擎是标准js的超集。
‘jsapi‘则是导入v8的接口
如果是在windows平台下编译,到这里就可以直接使用gyp生成vs工程了。如果是linux平台的还需要进一步移除源码中对js的引用,均位于
fpdfsdk/src/fsdk_mgr.cpp
文件中。
- 注释掉第11行的头文件应用
//#include "../include/javascript/IJavaScript.h"
- 注释掉215行GetJSRuntimeFactory()函数及其引用(235-238)
CJS_RuntimeFactory* GetJSRuntimeFactory() { static CJS_RuntimeFactory s_JSRuntimeFactory; return &s_JSRuntimeFactory; } m_pJSRuntimeFactory = NULL; m_pJSRuntimeFactory = GetJSRuntimeFactory(); m_pJSRuntimeFactory->AddRef();
- 置CPDFDoc_Environment::GetJSRuntime()函数返回NULL
IFXJS_Runtime* CPDFDoc_Environment::GetJSRuntime() { /*if(!IsJSInitiated()) return NULL; assert(m_pJSRuntimeFactory); if(!m_pJSRuntime) m_pJSRuntime = m_pJSRuntimeFactory->NewJSRuntime(this); return m_pJSRuntime;*/ return NULL; }
OK,前置任务完成!进入编译。
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