How to use JNI to open the fb0 ? about android-vnc-server HOT 5 OPEN

Could you please let me know on the step by step process to compile the 
libandroidvncserver.so from the source code?

I edit this file :Android.mk for androidvncserver .At last code, edit it to be 
:included $(BUILD_SHARED_LIBRARY)
also edit the name after compiled:LOCAL_MODLE:libandroidvncserver.

And also edit the file:Android.mk for jpeg in external.edit it to be :included 
$(BUILD_STATIC_LIBRARY)

Then change the function "int main(int argc, char **argv)" to be "void start()" 
in fbvncserver.c.

Compiled, There will be a file libandroidvncserver.so.

I want to use a android app to call this SO using NDK. But failed.I seems only 
root can open it.

Do you have any suggestion?

Thank you for the input. There are two external libraries that are needed (zlib 
and jpeg). I got the source code and build the corresponding library for jpeg. 
I copied the same to <project_home>/external/jpeg and compiled using ndk-build. 
However, I get a lot of error messages as shown below. Did you come across 
these errors and do you know how to fix them? I have attached the header file 
for reference. I would appreciate any help.
.
.
.
external/jpeg/jpeglib.h:848: error: expected ')' before '(' token
external/jpeg/jpeglib.h: In function 'EXTERN':
external/jpeg/jpeglib.h:928: error: expected declaration specifiers before 
'jpeg_std_error'
external/jpeg/jpeglib.h:944: error: expected declaration specifiers before 
'EXTERN'
external/jpeg/jpeglib.h:946: error: expected declaration specifiers before 
'EXTERN'
.
.
.

Please ignore my previous comment(#3). I had overlooked including some header 
files. Now that issue is fixed. However, I now have another problem. I compiled 
the libz.so and when I use ndk-build to create the libandroidvncserver.so, I 
get the following error.
libz.so: file not recognized: File format not recognized

How did you compile/obtain the libz.so library?

I was able to compile the libandroidvncserver.so but facing the same issue of 
"cannot open fb device /dev/graphics/fb0".
Looks like the android apps do not have access to kernel drivers and hence the 
permissions issue.
Were you able to solve the problem?