pdfium舍弃v8依赖
2024-09-06 09:54:52
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。
https://zhuanlan.zhihu.com/p/37729756
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