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qgsgrassgislib.cpp
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qgsgrassgislib.cpp
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/***************************************************************************
qgsgrassgislib.cpp - Fake GRASS gis lib
-------------------
begin : Nov 2012
copyright : (C) 2012 by Radim Blazek
email : radim dot blazek at gmail dot com
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
//#include <signal.h>
#include <stdio.h>
#include <stdarg.h>
#include <qmath.h>
#include <QtGlobal>
// If qgsgrassgislibfunctions.h is included on Linux, symbols defined here
// cannot be found (undefined symbol error) even if they are present in
// the library (in code section) - why?
#ifdef Q_OS_WIN
#include "qgsgrassgislibfunctions.h"
extern "C"
{
// defined here because too complex for parser in CMakeLists.txt
int GRASS_LIB_EXPORT G_cell_stats_histo_eq( struct Cell_stats *statf, CELL min1, CELL max1, CELL min2, CELL max2, int zero, void ( *func )( CELL, CELL, CELL ) );
}
#endif
#include "qgsgrassgislib.h"
#include "qgis.h"
#include "qgslogger.h"
#include "qgsapplication.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsdatasourceuri.h"
#include "qgsgeometry.h"
#include "qgsrectangle.h"
#include "qgsconfig.h"
#include "qgsunittypes.h"
#include <QByteArray>
#include <QFileDialog>
#include <QMessageBox>
#include <QProcess>
#include <QSettings>
#include <QTextStream>
#include <QTemporaryFile>
#include <QHash>
#include <QTextCodec>
#if 0
extern "C"
{
#ifndef _MSC_VER
#include <unistd.h>
#endif
#include <grass/gprojects.h>
#include <grass/Vect.h>
#include <grass/version.h>
}
#endif
#if !defined(GRASS_VERSION_MAJOR) || \
!defined(GRASS_VERSION_MINOR) || \
GRASS_VERSION_MAJOR<6 || \
(GRASS_VERSION_MAJOR == 6 && GRASS_VERSION_MINOR <= 2)
#define G__setenv(name,value) G__setenv( ( char * ) (name), (char *) (value) )
#endif
#ifdef Q_OS_WIN
#include <windows.h>
#endif
QgsGrassGisLib *QgsGrassGisLib::_instance = 0;
QgsGrassGisLib GRASS_LIB_EXPORT *QgsGrassGisLib::instance()
{
if ( _instance == 0 )
{
_instance = new QgsGrassGisLib();
}
return _instance;
}
QgsGrassGisLib::QgsGrassGisLib()
{
// Load original GRASS library
// GRASS_LIBRARY_GIS (cmake GRASS_LIBRARY_gis) is a path to the GRASS library
// in the time of compilation, it may be used on runtime (it is the same)
// on Linux and Mac but on Windows with OSGEO4W the GRASS may be installed
// in a different directory. qgis.env however calls GRASS etc/env.bat
// which sets GISBASE and GRASS_LIBRARY_GIS on Windows is path to .lib, e.g
// grass_gis.lib. Name of the DLL on Windows is e.g.: libgrass_gis.6.4.3RC1.dll
QString gisBase = getenv( "GISBASE" );
#ifdef Q_OS_WIN
if ( gisBase.isEmpty() )
{
fatal( "GISBASE environment variable not set" );
}
QString libPath = gisBase + "\\lib\\libgrass_gis." + QString( GRASS_VERSION ) + ".dll";
#else
QString libPath = QString( GRASS_LIBRARY_GIS );
// Prefere GISBASE if set
if ( !gisBase.isEmpty() )
{
libPath = gisBase + "/lib/" + QFileInfo( libPath ).fileName();
}
#endif
QgsDebugMsg( "libPath = " + libPath );
mLibrary.setFileName( libPath );
if ( !mLibrary.load() )
{
fatal( "Cannot load true GRASS library, path: " + libPath );
return;
}
}
int GRASS_LIB_EXPORT QgsGrassGisLib::errorRoutine( const char *msg, int fatal )
{
Q_UNUSED( fatal );
QgsDebugMsg( QString( "error_routine (fatal = %1): %2" ).arg( fatal ).arg( msg ) );
// qFatal does core dump, useful for backtrace
if ( fatal )
{
qFatal( "Fatal: %s", msg );
}
else
{
qWarning( "Warning: %s", msg );
}
return 1;
}
void QgsGrassGisLib::fatal( QString msg )
{
QgsLogger::fatal( msg ); // calls qFatal which does core dump
}
void QgsGrassGisLib::warning( QString msg )
{
QgsLogger::warning( msg );
}
void * QgsGrassGisLib::resolve( const char * symbol )
{
QgsDebugMsgLevel( QString( "symbol = %1" ).arg( symbol ), 5 );
void * fn = mLibrary.resolve( symbol );
if ( !fn )
{
fatal( "Cannot resolve symbol " + QString( symbol ) );
}
return fn;
}
int GRASS_LIB_EXPORT QgsGrassGisLib::G__gisinit( const char * version, const char * programName )
{
Q_UNUSED( version );
// We use this function also to init our fake lib
QgsDebugMsg( QString( "version = %1 programName = %2" ).arg( version ).arg( programName ) );
// Init providers path
int argc = 1;
char **argv = new char*[1];
argv[0] = qstrdup( programName );
// unfortunately it seems impossible to get QGIS prefix
// QCoreApplication::applicationDirPath() returns $GISBASE/lib on Linux
#if 0
QDir dir( QCoreApplication::applicationDirPath() );
dir.cdUp();
QString prefixPath = dir.absolutePath();
#endif
//QCoreApplication app( argc, argv ); // to init paths
QgsApplication app( argc, argv, false ); // to init paths
// TODO: WCS (network) fails with: "QTimer can only be used with threads started
// with QThread" because QCoreApplication::exec() was not called, but
// QCoreApplication::exec() goes to loop. We need to start QThread somehow.
// QGIS_PREFIX_PATH should be loaded by QgsApplication
//QString prefixPath = getenv( "QGIS_PREFIX_PATH" );
//if ( prefixPath.isEmpty() )
//{
// fatal( "Cannot get QGIS_PREFIX_PATH" );
//}
//QgsApplication::setPrefixPath( prefixPath, true );
QgsDebugMsg( "Plugin path: " + QgsApplication::pluginPath() );
QgsProviderRegistry::instance( QgsApplication::pluginPath() );
QgsDebugMsg( "qgisSettingsDirPath = " + app.qgisSettingsDirPath() );
G_set_error_routine( &errorRoutine );
G_set_gisrc_mode( G_GISRC_MODE_MEMORY );
G_setenv( "OVERWRITE", "1" ); // avoid checking if map exists
G_suppress_masking();
#if GRASS_VERSION_MAJOR<6 || (GRASS_VERSION_MAJOR == 6 && GRASS_VERSION_MINOR <= 4)
G__init_null_patterns();
#endif
// Read projection if set
//mCrs.createFromOgcWmsCrs( "EPSG:900913" );
QString crsStr = getenv( "QGIS_GRASS_CRS" );
QgsDebugMsg( "Setting CRS to " + crsStr );
if ( !crsStr.isEmpty() )
{
if ( !mCrs.createFromProj4( crsStr ) )
{
fatal( "Cannot create CRS from QGIS_GRASS_CRS: " + crsStr );
}
//TODO: createFromProj4 used to save to the user database any new CRS
// this behavior was changed in order to separate creation and saving.
// Not sure if it necessary to save it here, should be checked by someone
// familiar with the code (should also give a more descriptive name to the generated CRS)
if ( mCrs.srsid() == 0 )
{
QString myName = QString( " * %1 (%2)" )
.arg( QObject::tr( "Generated CRS", "A CRS automatically generated from layer info get this prefix for description" ) )
.arg( mCrs.toProj4() );
mCrs.saveAsUserCRS( myName );
}
}
mDistanceArea.setSourceCrs( mCrs );
// Read region fron environment variable
// QGIS_GRASS_REGION=west,south,east,north,cols,rows
#if 0
QString regionStr = getenv( "QGIS_GRASS_REGION" );
QStringList regionList = regionStr.split( "," );
if ( regionList.size() != 6 )
{
fatal( "Cannot read region from QGIS_GRASS_REGION environment variable" );
}
double xMin, yMin, xMax, yMax;
int cols, rows;
bool xMinOk, yMinOk, xMaxOk, yMaxOk, colsOk, rowsOk;
xMin = regionList.value( 0 ).toDouble( &xMinOk );
yMin = regionList.value( 1 ).toDouble( &yMinOk );
xMax = regionList.value( 2 ).toDouble( &xMaxOk );
yMax = regionList.value( 3 ).toDouble( &yMaxOk );
cols = regionList.value( 4 ).toInt( &colsOk );
rows = regionList.value( 5 ).toInt( &rowsOk );
if ( !xMinOk || !yMinOk || !xMaxOk || !yMaxOk || !colsOk || !rowsOk )
{
fatal( "Cannot parse QGIS_GRASS_REGION" );
}
struct Cell_head window;
window.west = xMin;
window.south = yMin;
window.east = xMax;
window.north = yMax;
window.rows = rows;
window.cols = cols;
char* err = G_adjust_Cell_head( &window, 1, 1 );
if ( err )
{
fatal( QString( err ) );
}
G_set_window( &window );
#endif
QString regionStr = getenv( "GRASS_REGION" );
if ( regionStr.isEmpty() )
{
fatal( "GRASS_REGION environment variable not set" );
}
QgsDebugMsg( "Getting region via true lib from GRASS_REGION: " + regionStr );
// GRASS true lib reads GRASS_REGION environment variable
G_get_window( &mWindow );
mExtent = QgsRectangle( mWindow.west, mWindow.south, mWindow.east, mWindow.north );
mRows = mWindow.rows;
mColumns = mWindow.cols;
mXRes = mExtent.width() / mColumns;
mYRes = mExtent.height() / mColumns;
QgsDebugMsg( "End" );
return 0;
}
int GRASS_LIB_EXPORT G__gisinit( const char * version, const char * programName )
{
return QgsGrassGisLib::instance()->G__gisinit( version, programName );
}
typedef int G_parser_type( int argc, char **argv );
int GRASS_LIB_EXPORT G_parser( int argc, char **argv )
{
G_parser_type* fn = ( G_parser_type* ) cast_to_fptr( QgsGrassGisLib::instance()->resolve( "G_parser" ) );
int ret = fn( argc, argv );
if ( ret == 0 ) // parsed OK
{
// It would be useful to determine the region from input raster layers if
// no one is given by environment variable but there seems to be no way to
// get access to module options. Everything is in static variables in
// parser.c and there are no access functions to them.
}
return ret;
}
// Defined here just because parser in cmake does not recognize this kind of params
typedef int G_set_error_routine_type( int ( * )( const char *, int ) );
int GRASS_LIB_EXPORT G_set_error_routine( int ( *error_routine )( const char *, int ) )
{
G_set_error_routine_type* fn = ( G_set_error_routine_type* ) cast_to_fptr( QgsGrassGisLib::instance()->resolve( "G_set_error_routine" ) );
return fn( error_routine );
}
typedef int G_warning_type( const char *, ... );
int GRASS_LIB_EXPORT G_warning( const char * msg, ... )
{
G_warning_type* fn = ( G_warning_type* ) cast_to_fptr( QgsGrassGisLib::instance()->resolve( "G_warning" ) );
va_list ap;
va_start( ap, msg );
int ret = fn( msg, ap );
va_end( ap );
return ret;
}
typedef void G_important_message_type( const char *msg, ... );
void GRASS_LIB_EXPORT G_important_message( const char * msg, ... )
{
G_important_message_type* fn = ( G_important_message_type* ) cast_to_fptr( QgsGrassGisLib::instance()->resolve( "G_important_message" ) );
va_list ap;
va_start( ap, msg );
fn( msg, ap );
va_end( ap );
}
// G_fatal_error is declared in gisdefs.h as int but noreturn
//typedef int G_fatal_error_type( const char *, ... );
int GRASS_LIB_EXPORT G_fatal_error( const char * msg, ... )
{
//G_fatal_error_type* fn = ( G_fatal_error_type* ) cast_to_fptr( QgsGrassGisLib::instance()->resolve( "G_fatal_error" ) );
va_list ap;
va_start( ap, msg );
//fn( msg, ap );
char buffer[2000];
vsprintf( buffer, msg, ap );
va_end( ap );
// qFatal does core dump, useful for backtrace
qFatal( "Fatal error: %s", buffer );
exit( 1 ); // must exit to avoid compilation warning
}
typedef int G_snprintf_type( char *, size_t, const char *, ... );
int GRASS_LIB_EXPORT G_snprintf( char *str, size_t size, const char *fmt, ... )
{
G_snprintf_type* fn = ( G_snprintf_type* ) cast_to_fptr( QgsGrassGisLib::instance()->resolve( "G_snprintf" ) );
va_list ap;
va_start( ap, fmt );
int ret = fn( str, size, fmt, ap );
va_end( ap );
return ret;
}
int GRASS_LIB_EXPORT G_done_msg( const char *msg, ... )
{
Q_UNUSED( msg );
// TODO
return 0;
}
char GRASS_LIB_EXPORT *QgsGrassGisLib::G_find_cell2( const char * name, const char * mapset )
{
Q_UNUSED( name );
Q_UNUSED( mapset );
QgsDebugMsg( "name = " + QString( name ) );
// G_find_cell2 is used by some modules to test if output exists (r.basins.fill)
// and exits with fatal error if exists -> we must test existence here
Raster rast = raster( name );
if ( !rast.provider || !rast.provider->isValid() )
{
return 0;
}
QString ms = "qgis";
return qstrdup( ms.toLatin1() ); // memory lost
}
char GRASS_LIB_EXPORT *G__file_name( char *path, const char *element, const char *name, const char *mapset )
{
Q_UNUSED( path );
Q_UNUSED( element );
Q_UNUSED( name );
Q_UNUSED( mapset );
return nullptr;
}
char *G__file_name_misc( char *path, const char *dir, const char *element, const char *name, const char *mapset )
{
Q_UNUSED( path );
Q_UNUSED( dir );
Q_UNUSED( element );
Q_UNUSED( name );
Q_UNUSED( mapset );
return nullptr;
}
char GRASS_LIB_EXPORT *G_find_cell2( const char* name, const char *mapset )
{
return QgsGrassGisLib::instance()->G_find_cell2( name, mapset );
}
char GRASS_LIB_EXPORT *G_find_cell( char * name, const char * mapset )
{
// Not really sure about differences between G_find_cell and G_find_cell2
return G_find_cell2( name, mapset );
}
char GRASS_LIB_EXPORT *G_find_file( const char *element, char *name, const char *mapset )
{
Q_UNUSED( element );
Q_UNUSED( name );
Q_UNUSED( mapset );
return nullptr;
}
char GRASS_LIB_EXPORT *G_find_file2( const char *element, const char *name, const char *mapset )
{
Q_UNUSED( element );
Q_UNUSED( name );
Q_UNUSED( mapset );
return nullptr;
}
char GRASS_LIB_EXPORT *G_find_file_misc( const char *dir, const char *element, char *name, const char *mapset )
{
Q_UNUSED( dir );
Q_UNUSED( element );
Q_UNUSED( name );
Q_UNUSED( mapset );
return nullptr;
}
char GRASS_LIB_EXPORT *G_find_file2_misc( const char *dir, const char *element, const char *name, const char *mapset )
{
Q_UNUSED( dir );
Q_UNUSED( element );
Q_UNUSED( name );
Q_UNUSED( mapset );
return nullptr;
}
QgsGrassGisLib::Raster QgsGrassGisLib::raster( QString name )
{
QgsDebugMsg( "name = " + name );
foreach ( Raster raster, mRasters )
{
if ( raster.name == name ) return raster;
}
QString providerKey;
QString dataSource;
int band = 1;
if ( name.contains( "provider=" ) ) // encoded uri
{
QgsDataSourceUri uri;
uri.setEncodedUri( name.toLocal8Bit() );
if ( uri.hasParam( "band" ) )
{
band = uri.param( "band" ).toInt();
}
providerKey = uri.param( "provider" );
if ( providerKey == "gdal" )
{
dataSource = uri.param( "path" );
}
else
{
uri.removeParam( "band" );
uri.removeParam( "provider" );
dataSource = uri.encodedUri();
}
}
else // simple GDAL path
{
providerKey = "gdal";
dataSource = name;
band = 1;
}
QgsDebugMsg( "providerKey = " + providerKey );
QgsDebugMsg( "dataSource = " + dataSource );
QgsDebugMsg( QString( "band = %1" ).arg( band ) );
Raster raster;
raster.name = name;
raster.band = band;
raster.provider = ( QgsRasterDataProvider* )QgsProviderRegistry::instance()->provider( providerKey, dataSource );
if ( !raster.provider || !raster.provider->isValid() )
{
// No fatal, it may be used to test file existence
//fatal( "Cannot load raster provider with data source: " + dataSource );
}
else
{
raster.input = raster.provider;
if ( band < 1 || band > raster.provider->bandCount() )
{
fatal( "Band out of range" );
}
QgsDebugMsg( QString( "mCrs valid = %1 = %2" ).arg( mCrs.isValid() ).arg( mCrs.toProj4() ) );
QgsDebugMsg( QString( "crs valid = %1 = %2" ).arg( raster.provider->crs().isValid() ).arg( raster.provider->crs().toProj4() ) );
if ( mCrs.isValid() )
{
// GDAL provider loads data without CRS as EPSG:4326!!! Verify, it should give
// invalid CRS instead.
if ( !raster.provider->crs().isValid() )
{
fatal( "Output CRS specified but input CRS is unknown" );
}
if ( mCrs != raster.provider->crs() )
{
raster.projector = new QgsRasterProjector();
raster.projector->setCRS( raster.provider->crs(), mCrs );
raster.projector->setInput( raster.provider );
raster.input = raster.projector;
}
}
}
raster.fd = mRasters.size();
mRasters.insert( raster.fd, raster );
return raster;
}
int QgsGrassGisLib::G_open_cell_old( const char *name, const char *mapset )
{
Q_UNUSED( mapset );
Raster rast = raster( name );
return rast.fd;
}
int GRASS_LIB_EXPORT G_open_cell_old( const char *name, const char *mapset )
{
return QgsGrassGisLib::instance()->G_open_cell_old( name, mapset );
}
int QgsGrassGisLib::G_close_cell( int fd )
{
Raster rast = mRasters.value( fd );
delete rast.provider;
delete rast.projector;
mRasters.remove( fd );
return 1;
}
int GRASS_LIB_EXPORT G_close_cell( int fd )
{
return QgsGrassGisLib::instance()->G_close_cell( fd );
}
int G_unopen_cell( int fd )
{
// TODO: delete created raster
QgsGrassGisLib::instance()->G_close_cell( fd );
return 1; // OK
}
int QgsGrassGisLib::G_open_raster_new( const char *name, RASTER_MAP_TYPE wr_type )
{
Q_UNUSED( wr_type );
QString providerKey = "gdal";
QString dataSource = name;
Raster raster;
raster.name = name;
//raster.writer = new QgsRasterFileWriter( dataSource );
QString outputFormat = "GTiff";
int nBands = 1;
Qgis::DataType type = qgisRasterType( wr_type );
QgsDebugMsg( QString( "type = %1" ).arg( type ) );
double geoTransform[6];
geoTransform[0] = mExtent.xMinimum();
geoTransform[1] = mExtent.width() / mColumns;
geoTransform[2] = 0.0;
geoTransform[3] = mExtent.yMaximum();
geoTransform[4] = 0.0;
geoTransform[5] = -1. * mExtent.height() / mRows;
raster.provider = QgsRasterDataProvider::create( providerKey, dataSource, outputFormat, nBands, type, mColumns, mRows, geoTransform, mCrs );
if ( !raster.provider || !raster.provider->isValid() )
{
if ( raster.provider ) delete raster.provider;
fatal( "Cannot create output data source: " + dataSource );
}
raster.band = 1;
raster.noDataValue = noDataValueForGrassType( wr_type );
QgsDebugMsg( QString( "noDataValue = %1" ).arg(( int )raster.noDataValue ) );
raster.provider->setNoDataValue( raster.band, raster.noDataValue );
raster.fd = mRasters.size();
mRasters.insert( raster.fd, raster );
return raster.fd;
}
int GRASS_LIB_EXPORT G_open_raster_new( const char *name, RASTER_MAP_TYPE wr_type )
{
return QgsGrassGisLib::instance()->G_open_raster_new( name, wr_type );
}
int GRASS_LIB_EXPORT G_open_cell_new( const char *name )
{
return QgsGrassGisLib::instance()->G_open_raster_new( name, CELL_TYPE );
}
int GRASS_LIB_EXPORT G_open_fp_cell_new( const char *name )
{
return QgsGrassGisLib::instance()->G_open_raster_new( name, FCELL_TYPE );
}
RASTER_MAP_TYPE QgsGrassGisLib::G_raster_map_type( const char *name, const char *mapset )
{
Q_UNUSED( mapset );
Raster rast = raster( name );
return grassRasterType( rast.provider->dataType( rast.band ) );
}
RASTER_MAP_TYPE GRASS_LIB_EXPORT G_raster_map_type( const char *name, const char *mapset )
{
return QgsGrassGisLib::instance()->G_raster_map_type( name, mapset );
}
RASTER_MAP_TYPE QgsGrassGisLib::G_get_raster_map_type( int fd )
{
Raster rast = mRasters.value( fd );
return grassRasterType( rast.provider->dataType( rast.band ) );
}
RASTER_MAP_TYPE GRASS_LIB_EXPORT G_get_raster_map_type( int fd )
{
return QgsGrassGisLib::instance()->G_get_raster_map_type( fd );
}
int GRASS_LIB_EXPORT G_raster_map_is_fp( const char *name, const char *mapset )
{
RASTER_MAP_TYPE type = QgsGrassGisLib::instance()->G_raster_map_type( name, mapset );
if ( type == FCELL_TYPE || type == DCELL_TYPE ) return 1;
return 0;
}
int QgsGrassGisLib::G_read_fp_range( const char *name, const char *mapset, struct FPRange *drange )
{
Q_UNUSED( mapset );
Raster rast = raster( name );
// TODO (no solution): Problem: GRASS has precise min/max values available,
// in QGIS we can calculate, but it would be slow, so we are using estimated
// values, which may result in wrong output
// Hopefully the range is not crutial for most modules, but it is problem certanly
// for r.rescale .. more?
// TODO: estimate only for large rasters
warning( "The module needs input raster values range, estimated values used." );
int sampleSize = 250000;
QgsRasterBandStats stats = rast.provider->bandStatistics( rast.band, QgsRasterBandStats::Min | QgsRasterBandStats::Max, rast.provider->extent(), sampleSize );
G_init_fp_range( drange );
// Attention: r.stats prints wrong results if range is wrong
G_update_fp_range( stats.minimumValue, drange );
G_update_fp_range( stats.maximumValue, drange );
return 1;
}
int GRASS_LIB_EXPORT G_read_fp_range( const char *name, const char *mapset, struct FPRange *range )
{
return QgsGrassGisLib::instance()->G_read_fp_range( name, mapset, range );
}
int GRASS_LIB_EXPORT G_read_range( const char *name, const char *mapset, struct Range *range )
{
struct FPRange drange;
QgsGrassGisLib::instance()->G_read_fp_range( name, mapset, &drange );
G_init_range( range );
G_update_range(( CELL ) floor( drange.min ), range );
G_update_range(( CELL ) ceil( drange.max ), range );
return 1;
}
int GRASS_LIB_EXPORT G_debug( int level, const char *msg, ... )
{
Q_UNUSED( level );
va_list ap;
va_start( ap, msg );
QString message = QString().vsprintf( msg, ap );
va_end( ap );
QgsDebugMsg( message );
return 1;
}
void GRASS_LIB_EXPORT G_message( const char *msg, ... )
{
va_list ap;
va_start( ap, msg );
QString message = QString().vsprintf( msg, ap );
va_end( ap );
QgsDebugMsg( message );
}
void GRASS_LIB_EXPORT G_verbose_message( const char *msg, ... )
{
va_list ap;
va_start( ap, msg );
QString message = QString().vsprintf( msg, ap );
va_end( ap );
QgsDebugMsg( message );
}
typedef int G_spawn_type( const char *command, ... );
int GRASS_LIB_EXPORT G_spawn( const char *command, ... )
{
va_list ap;
G_spawn_type* fn = ( G_spawn_type* ) cast_to_fptr( QgsGrassGisLib::instance()->resolve( "G_spawn" ) );
va_start( ap, command );
int ret = fn( command, ap );
va_end( ap );
return ret;
}
typedef int G_spawn_ex_type( const char *command, ... );
int GRASS_LIB_EXPORT G_spawn_ex( const char *command, ... )
{
va_list ap;
G_spawn_ex_type* fn = ( G_spawn_ex_type* ) cast_to_fptr( QgsGrassGisLib::instance()->resolve( "G_spawn_ex" ) );
va_start( ap, command );
int ret = fn( command, ap );
va_end( ap );
return ret;
}
int GRASS_LIB_EXPORT G_set_quant_rules( int fd, struct Quant *q )
{
Q_UNUSED( fd );
Q_UNUSED( q );
return 0;
}
int QgsGrassGisLib::readRasterRow( int fd, void * buf, int row, RASTER_MAP_TYPE data_type, bool noDataAsZero )
{
if ( row < 0 || row >= mRows )
{
QgsDebugMsg( QString( "row %1 out of range 0 - %2" ).arg( row ).arg( mRows ) );
return 0;
}
// TODO: use cached block with more rows
Raster raster = mRasters.value( fd );
//if ( !raster.provider ) return -1;
if ( !raster.input ) return -1;
// Create extent for current row
QgsRectangle blockRect = mExtent;
double yRes = mExtent.height() / mRows;
double yMax = mExtent.yMaximum() - yRes * row;
//QgsDebugMsg( QString( "height = %1 mRows = %2" ).arg( mExtent.height() ).arg( mRows ) );
//QgsDebugMsg( QString( "row = %1 yRes = %2 yRes * row = %3" ).arg( row ).arg( yRes ).arg( yRes * row ) );
//QgsDebugMsg( QString( "mExtent.yMaximum() = %1 yMax = %2" ).arg( mExtent.yMaximum() ).arg( yMax ) );
blockRect.setYMaximum( yMax );
blockRect.setYMinimum( yMax - yRes );
QgsRasterBlock *block = raster.input->block( raster.band, blockRect, mColumns, 1 );
if ( !block ) return -1;
Qgis::DataType requestedType = qgisRasterType( data_type );
//QgsDebugMsg( QString("data_type = %1").arg(data_type) );
//QgsDebugMsg( QString("requestedType = %1").arg(requestedType) );
//QgsDebugMsg( QString("requestedType size = %1").arg( QgsRasterBlock::typeSize( requestedType ) ) );
//QgsDebugMsg( QString("block->dataType = %1").arg( block->dataType() ) );
block->convert( requestedType );
memcpy( buf, block->bits( 0 ), QgsRasterBlock::typeSize( requestedType ) * mColumns );
for ( int i = 0; i < mColumns; i++ )
{
QgsDebugMsgLevel( QString( "row = %1 i = %2 val = %3 isNoData = %4" ).arg( row ).arg( i ).arg( block->value( i ) ).arg( block->isNoData( i ) ), 5 );
//(( CELL * ) buf )[i] = i;
if ( block->isNoData( 0, i ) )
{
if ( noDataAsZero )
{
switch ( data_type )
{
case CELL_TYPE:
G_zero(( char * ) &(( CELL * ) buf )[i], G_raster_size( data_type ) );
break;
case FCELL_TYPE:
G_zero(( char * ) &(( FCELL * ) buf )[i], G_raster_size( data_type ) );
break;
case DCELL_TYPE:
G_zero(( char * ) &(( DCELL * ) buf )[i], G_raster_size( data_type ) );
break;
default:
break;
}
}
else
{
switch ( data_type )
{
case CELL_TYPE:
G_set_c_null_value( &(( CELL * ) buf )[i], 1 );
break;
case FCELL_TYPE:
G_set_f_null_value( &(( FCELL * ) buf )[i], 1 );
break;
case DCELL_TYPE:
G_set_d_null_value( &(( DCELL * ) buf )[i], 1 );
break;
default:
break;
}
}
}
//else
//{
//memcpy( &( buf[i] ), block->bits( 0, i ), 4 );
//buf[i] = (int) block->value( 0, i);
//QgsDebugMsg( QString("buf[i] = %1").arg(buf[i]));
//}
}
delete block;
return 1;
}
int GRASS_LIB_EXPORT G_get_raster_row( int fd, void * buf, int row, RASTER_MAP_TYPE data_type )
{
bool noDataAsZero = false;
return QgsGrassGisLib::instance()->readRasterRow( fd, buf, row, data_type, noDataAsZero );
}
int GRASS_LIB_EXPORT G_get_raster_row_nomask( int fd, void * buf, int row, RASTER_MAP_TYPE data_type )
{
return G_get_raster_row( fd, buf, row, data_type );
}
int GRASS_LIB_EXPORT G_get_c_raster_row( int fd, CELL * buf, int row )
{
return G_get_raster_row( fd, ( void* )buf, row, CELL_TYPE );
}
int GRASS_LIB_EXPORT G_get_c_raster_row_nomask( int fd, CELL * buf, int row )
{
return G_get_raster_row_nomask( fd, buf, row, CELL_TYPE );
}
int GRASS_LIB_EXPORT G_get_f_raster_row( int fd, FCELL * buf, int row )
{
return G_get_raster_row( fd, ( void* )buf, row, FCELL_TYPE );
}
int GRASS_LIB_EXPORT G_get_f_raster_row_nomask( int fd, FCELL * buf, int row )
{
return G_get_raster_row_nomask( fd, ( void* )buf, row, FCELL_TYPE );
}
int GRASS_LIB_EXPORT G_get_d_raster_row( int fd, DCELL * buf, int row )
{
return G_get_raster_row( fd, ( void* )buf, row, DCELL_TYPE );
}
int GRASS_LIB_EXPORT G_get_d_raster_row_nomask( int fd, DCELL * buf, int row )
{
return G_get_raster_row_nomask( fd, ( void* )buf, row, DCELL_TYPE );
}
// reads null as zero
int GRASS_LIB_EXPORT G_get_map_row( int fd, CELL * buf, int row )
{
bool noDataAsZero = true;
return QgsGrassGisLib::instance()->readRasterRow( fd, ( void* )buf, row, CELL_TYPE, noDataAsZero );
}
int GRASS_LIB_EXPORT G_get_map_row_nomask( int fd, CELL * buf, int row )
{
return G_get_map_row( fd, buf, row );
}
int QgsGrassGisLib::G_get_null_value_row( int fd, char *flags, int row )
{
FCELL *buf = G_allocate_f_raster_buf();
QgsGrassGisLib::instance()->readRasterRow( fd, buf, row, FCELL_TYPE, false );
for ( int i = 0; i < mColumns; i++ )
{
flags[i] = G_is_f_null_value( &buf[i] ) ? 1 : 0;
}
G_free( buf );
return 1;
}
int GRASS_LIB_EXPORT G_get_null_value_row( int fd, char *flags, int row )
{
return QgsGrassGisLib::instance()->G_get_null_value_row( fd, flags, row );
}
int QgsGrassGisLib::putRasterRow( int fd, const void *buf, RASTER_MAP_TYPE data_type )
{
Raster rast = mRasters.value( fd );
if ( rast.row < 0 || rast.row >= mRows )
{
QgsDebugMsg( QString( "row %1 out of range 0 - %2" ).arg( rast.row ).arg( mRows ) );
return -1;
}
Qgis::DataType inputType = qgisRasterType( data_type );
//QgsDebugMsg( QString("data_type = %1").arg(data_type) );
//QgsDebugMsg( QString("inputType = %1").arg(inputType) );
//QgsDebugMsg( QString("provider->dataType = %1").arg( rast.provider->dataType( rast.band ) ) );
//double noDataValue = rast.provider->noDataValue( rast.band );
QgsRasterBlock block( inputType, mColumns, 1, rast.noDataValue );
memcpy( block.bits( 0 ), buf, QgsRasterBlock::typeSize( inputType )*mColumns );
block.convert( rast.provider->dataType( rast.band ) );
// Set no data after converting to output type
for ( int i = 0; i < mColumns; i++ )
{
bool isNoData = false;
switch ( data_type )
{
case CELL_TYPE:
isNoData = G_is_c_null_value( &(( CELL * ) buf )[i] ) != 0;
break;
case FCELL_TYPE:
isNoData = G_is_f_null_value( &(( FCELL * ) buf )[i] ) != 0;
break;
case DCELL_TYPE:
isNoData = G_is_d_null_value( &(( DCELL * ) buf )[i] ) != 0;
break;
default:
break;
}
if ( isNoData )
{
block.setIsNoData( i );
}
}
if ( !rast.provider->write( block.bits( 0 ), rast.band, mColumns, 1, 0, rast.row ) )
{
fatal( "Cannot write block" );
}
mRasters[fd].row++;
return 1;
}
int GRASS_LIB_EXPORT G_put_raster_row( int fd, const void *buf, RASTER_MAP_TYPE data_type )
{
return QgsGrassGisLib::instance()->putRasterRow( fd, buf, data_type );
}
int GRASS_LIB_EXPORT G_put_c_raster_row( int fd, const CELL * buf )
{
return QgsGrassGisLib::instance()->putRasterRow( fd, buf, CELL_TYPE );
}
int GRASS_LIB_EXPORT G_put_f_raster_row( int fd, const FCELL * buf )
{
return QgsGrassGisLib::instance()->putRasterRow( fd, buf, FCELL_TYPE );
}
int GRASS_LIB_EXPORT G_put_d_raster_row( int fd, const DCELL * buf )
{