[Proj] Re: JNI api for Proj4

[Frank Warmerdam]

Steffen,

I agree with your analysis and I have committed the suggested 
changes in CVS. 

On 7/5/05, skoehler at buschjena.de <skoehler at buschjena.de> wrote:
> Hello,
> 
> I installed the proj4 version 4.4.9 on my pc using cygwin. After a hard
> work to create an dll with the cygwin I found a small error in
> the jniproj.c
> In function transform the proj4-function pj_transform is called. This
> functions has three double fields, count and offset as parameter.
> So the loop is wrong with the count and offset parameter from the funtion
> parameter. I will send you my modified version:
> 
> JNIEXPORT void JNICALL Java_org_proj4_Projections_transform
>   (JNIEnv * env, jobject parent, jdoubleArray firstcoord, jdoubleArray
> secondcoord,
>  jdoubleArray values, jstring src, jstring dest, jlong pcount, jint
> poffset)
> {
>         int i;
>         projPJ src_pj, dst_pj;
>         char * srcproj_def = (char *) (*env)->GetStringUTFChars (env, src,
> 0);
>         char * destproj_def = (char *) (*env)->GetStringUTFChars (env,
> dest, 0);
> 
>         if (!(src_pj = pj_init_plus(srcproj_def)))
>                 exit(1);
>         if (!(dst_pj = pj_init_plus(destproj_def)))
>                 exit(1);
> 
>         jdouble *xcoord = (* env)-> GetDoubleArrayElements(env,
> firstcoord, NULL);
>         jdouble *ycoord = (* env) -> GetDoubleArrayElements(env,
> secondcoord, NULL);
>                 jdouble *zcoord = (* env) -> GetDoubleArrayElements(env,
> values, NULL);
> 
>         pj_transform( src_pj, dst_pj, pcount,poffset, xcoord, ycoord,
> zcoord);
> 
>         (* env)->ReleaseDoubleArrayElements(env,firstcoord,xcoord,0);
>         (* env)->ReleaseDoubleArrayElements(env,secondcoord,ycoord,0);
>                 (* env)->ReleaseDoubleArrayElements(env,values,zcoord,0);
> 
>         pj_free( src_pj );
>         pj_free( dst_pj );
> }
> 
> with best regards
> Steffen Köhler
> 
> 
> 
> ---------------------------------------------------------------------------
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> Softwareentwicklung
> Fregestrasse 6/8
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> 
> 
> 


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