Application: gvSIG desktop

/**********************************************************************

 * $Id: rasterband_interfaz.c 716 2004-12-28 14:07:11Z igbrotru $

 *

 * Name:     rasterband_interfaz.c

 * Project:  JGDAL. Interface java to gdal (Frank Warmerdam).

 * Purpose:  Raster band's Basic Funcions.

 * Author:   Nacho Brodin, brodin_ign@gva.es

 *

 **********************************************************************/

/*Copyright (C) 2004  Nacho Brodin <brodin_ign@gva.es>

 This program is free software; you can redistribute it and/or

 modify it under the terms of the GNU General Public License

 as published by the Free Software Foundation; either version 2

 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,

 but WITHOUT ANY WARRANTY; without even the implied warranty of

 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License

 along with this program; if not, write to the Free Software

 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 */

#include <jni.h>

#include "es_gva_cit_wrappergdal_GdalRasterBand.h"

#include "es_gva_cit_wrappergdal_JNIBase.h"

#include "gdal.h"

#include "cpl_string.h"

/******************************************************************************/

//                                                        GetRasterBandXSize

/******************************************************************************/

JNIEXPORT jint JNICALL Java_es_gva_cit_wrappergdal_JNIBase_getRasterBandXSizeNat

  (JNIEnv *env, jobject obj, jlong cPtr){

          GDALRasterBandH *rb  = (GDALRasterBandH *) 0 ;

          int res = -1;

    rb = *(GDALRasterBandH **)&cPtr;

    if(rb!=NULL)

            res = GDALGetRasterBandXSize(rb);        

    return res;

  }

/******************************************************************************/ 

//                                                        GetRasterBandYSize

/******************************************************************************/

JNIEXPORT jint JNICALL Java_es_gva_cit_wrappergdal_JNIBase_getRasterBandYSizeNat

  (JNIEnv *env, jobject obj, jlong cPtr){

          GDALRasterBandH *rb  = (GDALRasterBandH *) 0 ;

          int res = -1;

    rb = *(GDALRasterBandH **)&cPtr;

    if(rb!=NULL)

            res = GDALGetRasterBandYSize(rb);        

    return res;

  }

 /****************************************************************************/

 //                                                         GetOverviewCount

 /******************************************************************************/

  JNIEXPORT jint JNICALL Java_es_gva_cit_wrappergdal_JNIBase_getOverviewCountNat

  (JNIEnv *env, jobject obj, jlong cPtr){

          GDALRasterBandH *rb  = (GDALRasterBandH *) 0 ;

          int res = -1;

    rb = *(GDALRasterBandH **)&cPtr;

    if(rb!=NULL)

                res = GDALGetOverviewCount(rb);        

    return res;

  }

/******************************************************************************/   

//                                                                GetOverview

/******************************************************************************/

JNIEXPORT jlong JNICALL Java_es_gva_cit_wrappergdal_GdalRasterBand_getOverviewNat

  (JNIEnv *env, jobject obj, jlong cPtr, jint noverview){

        GDALRasterBandH *rb  = (GDALRasterBandH *) 0 ;

        GDALRasterBandH *res = NULL;

        jlong jresult = 0;

        rb = *(GDALRasterBandH **)&cPtr;

    if(rb!=NULL)

            res = GDALGetOverview(rb,(int)noverview);

    *(GDALDatasetH **)&jresult = res;

    if(res==NULL)return -1;

    else return jresult;

  }

/******************************************************************************/     

//                                                                ReadRaster

/******************************************************************************/  

JNIEXPORT jobject JNICALL Java_es_gva_cit_wrappergdal_GdalRasterBand_readRasterNat

  (JNIEnv *env, jobject obj, jlong cPtr, jint nXOff, jint nYOff, jint nXSize, jint nYSize, jint BufXSize, jint BufYSize, jint eBufType){

                  jclass class_gdalbuffer;

                  jmethodID metodo;

                  jobject obj_gdalbuffer = NULL;

                  jfieldID id_campo;

                  unsigned char *pabyScanLineBuf;

                  GDALRasterBandH *rb  = (GDALRasterBandH *) 0 ;

                  jbyteArray bytearray;

            rb = *(GDALRasterBandH **)&cPtr;

                  if(rb!=NULL){

                  //Creamos el objeto java que contendr? la l?nea

                          class_gdalbuffer = (*env)->FindClass (env, "es/gva/cit/wrappergdal/GdalBuffer");

                          metodo = (*env)->GetMethodID(env, class_gdalbuffer, "reserva", "(I)V");

                          obj_gdalbuffer = (*env)->NewObject (env,class_gdalbuffer,metodo,(int)(nXSize*nYSize));

                          id_campo = (*env)->GetFieldID(env, class_gdalbuffer, "pabyScanLineBuf", "[B");

                   //Reservamos memoria para el buffer y lo cargamos llamando a GDALRasterIO

                          pabyScanLineBuf = (unsigned char*) CPLMalloc(sizeof(unsigned char) *(int)nXSize * (int)nYSize);

                          GDALRasterIO(rb, GF_Read,  (int)nXOff, (int)nYOff, (int)nXSize, (int)nYSize, pabyScanLineBuf, (int)BufXSize, (int)BufYSize, GDT_Byte, 0, 0);

                          bytearray = (*env)->NewByteArray(env,(int)(nXSize*nYSize));

                    if(bytearray!=NULL){

                                  (*env)->SetByteArrayRegion(env, bytearray, 0, (int)(nXSize*nYSize),(jbyte *)pabyScanLineBuf); 

                                  (*env)->SetObjectField(env, obj_gdalbuffer, id_campo, bytearray);

                        }

                  //Liberamos la memoria de la linea le?da 

                  if(pabyScanLineBuf != NULL)CPLFree(pabyScanLineBuf);

                  }

                  return obj_gdalbuffer;

  } 

/******************************************************************************/

//                                                                GetBlockXSize

/******************************************************************************/

JNIEXPORT jint JNICALL Java_es_gva_cit_wrappergdal_JNIBase_getBlockXSizeNat

  (JNIEnv *env, jobject obj, jlong cPtr){

          GDALRasterBandH *rb  = (GDALRasterBandH *) 0 ;

          int pnXSize=-1,pnYSize=-1;

    rb = *(GDALRasterBandH **)&cPtr;

    if(rb!=NULL)

            GDALGetBlockSize( rb,&pnXSize, &pnYSize );

    return pnXSize;

  }

/******************************************************************************/     

//                                                                WriteRaster

/******************************************************************************/  

JNIEXPORT void JNICALL Java_es_gva_cit_wrappergdal_GdalRasterBand_writeRasterNat

  (JNIEnv *env, jobject obj, jlong cPtr, jint nXOff, jint nYOff, jint nXSize, jint nYSize, jobject buffer, jint eBufType){

                  GDALRasterBandH *rb  = (GDALRasterBandH *) 0 ;

                  jclass clase;

                  jfieldID id_campo;

                  jmethodID metodo;

                  jbyteArray bytearray;

                  int tam;

                  unsigned char *abyRaster;

                  clase = (*env)->GetObjectClass(env, buffer);

                  id_campo = (*env)->GetFieldID(env, clase, "pabyScanLineBuf", "[B");

                  metodo = (*env)->GetMethodID(env, clase, "getSize","()I");

                  tam = (*env)->CallIntMethod(env,buffer,metodo);

                  bytearray =(jbyteArray)(*env)->GetObjectField(env, buffer, id_campo); 

                  abyRaster=(unsigned char *)malloc(sizeof(unsigned char)*tam);

                  if(bytearray!=NULL){

                      (*env)->GetByteArrayRegion(env,bytearray,0,tam,(jbyte *)abyRaster); 

                }

                  rb = *(GDALRasterBandH **)&cPtr;

                  if(rb!=NULL)

                          GDALRasterIO( rb, GF_Write, nXOff, nYOff, nXSize, nYSize, 

                  abyRaster, nXSize, nYSize, GDT_Byte, 0, 0 );

        free(abyRaster);

  }

/******************************************************************************/

//                                                                GetBlockYSize

/******************************************************************************/

JNIEXPORT jint JNICALL Java_es_gva_cit_wrappergdal_JNIBase_getBlockYSizeNat

  (JNIEnv *env, jobject obj, jlong cPtr){

          GDALRasterBandH *rb  = (GDALRasterBandH *) 0 ;

          int pnXSize=-1,pnYSize=-1;

    rb = *(GDALRasterBandH **)&cPtr;

    if(rb!=NULL)

            GDALGetBlockSize( rb,&pnXSize, &pnYSize );

    return pnYSize;

  }