Add some debug output when GDALRasterIO operations fail

Or the compiler will complain about unhandled returns

src/analysis/raster/qgsninecellfilter.cpp

@@ -16,6 +16,7 @@
  ***************************************************************************/
 
 #include "qgsninecellfilter.h"
+#include "qgslogger.h"
 #include "cpl_string.h"
 #include <QProgressDialog>
 #include <QFile>
@@ -138,7 +139,8 @@ int QgsNineCellFilter::processRaster( QProgressDialog* p )
       {
         scanLine1[a] = mInputNodataValue;
       }
-      GDALRasterIO( rasterBand, GF_Read, 0, 0, xSize, 1, scanLine2, xSize, 1, GDT_Float32, 0, 0 );
+      if ( GDALRasterIO( rasterBand, GF_Read, 0, 0, xSize, 1, scanLine2, xSize, 1, GDT_Float32, 0, 0 ) != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
     }
     else
     {
@@ -158,7 +160,8 @@ int QgsNineCellFilter::processRaster( QProgressDialog* p )
     }
     else
     {
-      GDALRasterIO( rasterBand, GF_Read, 0, i + 1, xSize, 1, scanLine3, xSize, 1, GDT_Float32, 0, 0 );
+      if ( GDALRasterIO( rasterBand, GF_Read, 0, i + 1, xSize, 1, scanLine3, xSize, 1, GDT_Float32, 0, 0 ) != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
     }
 
     for ( int j = 0; j < xSize; ++j )
@@ -180,7 +183,8 @@ int QgsNineCellFilter::processRaster( QProgressDialog* p )
       }
     }
 
-    GDALRasterIO( outputRasterBand, GF_Write, 0, i, xSize, 1, resultLine, xSize, 1, GDT_Float32, 0, 0 );
+    if ( GDALRasterIO( outputRasterBand, GF_Write, 0, i, xSize, 1, resultLine, xSize, 1, GDT_Float32, 0, 0 ) != CE_None )
+      QgsDebugMsg( "Raster IO Error" );
   }
 
   if ( p )

src/analysis/raster/qgsrastercalculator.cpp

@@ -156,7 +156,7 @@ int QgsRasterCalculator::processCalculation( QProgressDialog* p )
       //write scanline to the dataset
       if ( GDALRasterIO( outputRasterBand, GF_Write, 0, i, mNumOutputColumns, 1, calcData, mNumOutputColumns, 1, GDT_Float32, 0, 0 ) != CE_None )
       {
-        qWarning( "RasterIO error!" );
+        QgsDebugMsg( "RasterIO error!" );
       }
 
       delete[] calcData;

src/analysis/raster/qgsrelief.cpp

@@ -15,6 +15,7 @@
  *                                                                         *
  ***************************************************************************/
 
+#include "qgslogger.h"
 #include "qgsrelief.h"
 #include "qgsaspectfilter.h"
 #include "qgshillshadefilter.h"
@@ -202,7 +203,8 @@ int QgsRelief::processRaster( QProgressDialog* p )
       {
         scanLine1[a] = mInputNodataValue;
       }
-      GDALRasterIO( rasterBand, GF_Read, 0, 0, xSize, 1, scanLine2, xSize, 1, GDT_Float32, 0, 0 );
+      if ( GDALRasterIO( rasterBand, GF_Read, 0, 0, xSize, 1, scanLine2, xSize, 1, GDT_Float32, 0, 0 )  != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
     }
     else
     {
@@ -222,7 +224,8 @@ int QgsRelief::processRaster( QProgressDialog* p )
     }
     else
     {
-      GDALRasterIO( rasterBand, GF_Read, 0, i + 1, xSize, 1, scanLine3, xSize, 1, GDT_Float32, 0, 0 );
+      if ( GDALRasterIO( rasterBand, GF_Read, 0, i + 1, xSize, 1, scanLine3, xSize, 1, GDT_Float32, 0, 0 ) != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
     }
 
     for ( int j = 0; j < xSize; ++j )
@@ -254,9 +257,12 @@ int QgsRelief::processRaster( QProgressDialog* p )
       }
     }
 
-    GDALRasterIO( outputRedBand, GF_Write, 0, i, xSize, 1, resultRedLine, xSize, 1, GDT_Byte, 0, 0 );
-    GDALRasterIO( outputGreenBand, GF_Write, 0, i, xSize, 1, resultGreenLine, xSize, 1, GDT_Byte, 0, 0 );
-    GDALRasterIO( outputBlueBand, GF_Write, 0, i, xSize, 1, resultBlueLine, xSize, 1, GDT_Byte, 0, 0 );
+    if ( GDALRasterIO( outputRedBand, GF_Write, 0, i, xSize, 1, resultRedLine, xSize, 1, GDT_Byte, 0, 0 ) != CE_None )
+      QgsDebugMsg( "Raster IO Error" );
+    if ( GDALRasterIO( outputGreenBand, GF_Write, 0, i, xSize, 1, resultGreenLine, xSize, 1, GDT_Byte, 0, 0 ) != CE_None )
+      QgsDebugMsg( "Raster IO Error" );
+    if ( GDALRasterIO( outputBlueBand, GF_Write, 0, i, xSize, 1, resultBlueLine, xSize, 1, GDT_Byte, 0, 0 ) != CE_None )
+      QgsDebugMsg( "Raster IO Error" );
   }
 
   if ( p )
@@ -531,9 +537,13 @@ bool QgsRelief::exportFrequencyDistributionToCsv( const QString& file )
 
   for ( int i = 0; i < nCellsY; ++i )
   {
-    GDALRasterIO( elevationBand, GF_Read, 0, i, nCellsX, 1,
-                  scanLine, nCellsX, 1, GDT_Float32,
-                  0, 0 );
+    if ( GDALRasterIO( elevationBand, GF_Read, 0, i, nCellsX, 1,
+                       scanLine, nCellsX, 1, GDT_Float32,
+                       0, 0 ) != CE_None )
+    {
+      QgsDebugMsg( "Raster IO Error" );
+    }
+
     for ( int j = 0; j < nCellsX; ++j )
     {
       elevationClass = frequencyClassForElevation( scanLine[j], minMax[0], frequencyClassRange );
@@ -614,9 +624,12 @@ QList< QgsRelief::ReliefColor > QgsRelief::calculateOptimizedReliefClasses()
 
   for ( int i = 0; i < nCellsY; ++i )
   {
-    GDALRasterIO( elevationBand, GF_Read, 0, i, nCellsX, 1,
-                  scanLine, nCellsX, 1, GDT_Float32,
-                  0, 0 );
+    if ( GDALRasterIO( elevationBand, GF_Read, 0, i, nCellsX, 1,
+                       scanLine, nCellsX, 1, GDT_Float32,
+                       0, 0 ) != CE_None )
+    {
+      QgsDebugMsg( "Raster IO Error" );
+    }
     for ( int j = 0; j < nCellsX; ++j )
     {
       elevationClass = frequencyClassForElevation( scanLine[j], minMax[0], frequencyClassRange );

src/analysis/vector/qgszonalstatistics.cpp

@@ -482,7 +482,9 @@ void QgsZonalStatistics::statisticsFromPreciseIntersection( void* band, const Qg
     double currentX = rasterBBox.xMinimum() + cellSizeX / 2.0 + pixelOffsetX * cellSizeX;
     for ( int col = 0; col < nCellsX; ++col )
     {
-      GDALRasterIO( band, GF_Read, pixelOffsetX + col, pixelOffsetY + row, nCellsX, 1, pixelData, 1, 1, GDT_Float32, 0, 0 );
+      if ( GDALRasterIO( band, GF_Read, pixelOffsetX + col, pixelOffsetY + row, nCellsX, 1, pixelData, 1, 1, GDT_Float32, 0, 0 ) != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
+
       if ( !validPixel( *pixelData ) )
         continue;
 

src/plugins/heatmap/heatmap.cpp

@@ -170,7 +170,8 @@ void Heatmap::run()
   // Write the empty raster
   for ( int i = 0; i < rows ; i++ )
   {
-    poBand->RasterIO( GF_Write, 0, i, columns, 1, line, columns, 1, GDT_Float32, 0, 0 );
+    if ( poBand->RasterIO( GF_Write, 0, i, columns, 1, line, columns, 1, GDT_Float32, 0, 0 ) != CE_None )
+      QgsDebugMsg( "Raster IO Error" );
   }
 
   CPLFree( line );
@@ -299,8 +300,9 @@ void Heatmap::run()
 
       // get the data
       float *dataBuffer = ( float * ) CPLMalloc( sizeof( float ) * blockSize * blockSize );
-      poBand->RasterIO( GF_Read, xPosition, yPosition, blockSize, blockSize,
-                        dataBuffer, blockSize, blockSize, GDT_Float32, 0, 0 );
+      if ( poBand->RasterIO( GF_Read, xPosition, yPosition, blockSize, blockSize,
+                             dataBuffer, blockSize, blockSize, GDT_Float32, 0, 0 ) != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
 
       for ( int xp = 0; xp <= myBuffer; xp++ )
       {
@@ -341,8 +343,9 @@ void Heatmap::run()
           }
         }
       }
-      poBand->RasterIO( GF_Write, xPosition, yPosition, blockSize, blockSize,
-                        dataBuffer, blockSize, blockSize, GDT_Float32, 0, 0 );
+      if ( poBand->RasterIO( GF_Write, xPosition, yPosition, blockSize, blockSize,
+                             dataBuffer, blockSize, blockSize, GDT_Float32, 0, 0 ) != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
       CPLFree( dataBuffer );
     }
   }

src/providers/wcs/qgswcsprovider.cpp

@@ -587,7 +587,8 @@ void QgsWcsProvider::readBlock( int bandNo, QgsRectangle  const & viewExtent, in
         QgsDebugMsg( QString( "Couldn't allocate memory of %1 bytes" ).arg( size ) );
         return;
       }
-      GDALRasterIO( gdalBand, GF_Read, 0, 0, width, height, tmpData, width, height, ( GDALDataType ) mGdalDataType.at( bandNo - 1 ), 0, 0 );
+      if ( GDALRasterIO( gdalBand, GF_Read, 0, 0, width, height, tmpData, width, height, ( GDALDataType ) mGdalDataType.at( bandNo - 1 ), 0, 0 ) != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
       for ( int i = 0; i < pixelHeight; i++ )
       {
         for ( int j = 0; j < pixelWidth; j++ )
@@ -601,13 +602,16 @@ void QgsWcsProvider::readBlock( int bandNo, QgsRectangle  const & viewExtent, in
     }
     else if ( width == pixelWidth && height == pixelHeight )
     {
-      GDALRasterIO( gdalBand, GF_Read, 0, 0, pixelWidth, pixelHeight, block, pixelWidth, pixelHeight, ( GDALDataType ) mGdalDataType.at( bandNo - 1 ), 0, 0 );
-      QgsDebugMsg( tr( "Block read OK" ) );
+      if ( GDALRasterIO( gdalBand, GF_Read, 0, 0, pixelWidth, pixelHeight, block, pixelWidth, pixelHeight, ( GDALDataType ) mGdalDataType.at( bandNo - 1 ), 0, 0 ) != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
+      else
+        QgsDebugMsg( "Block read OK" );
     }
     else
     {
       // This should not happen, but it is better to give distorted result + warning
-      GDALRasterIO( gdalBand, GF_Read, 0, 0, width, height, block, pixelWidth, pixelHeight, ( GDALDataType ) mGdalDataType.at( bandNo - 1 ), 0, 0 );
+      if ( GDALRasterIO( gdalBand, GF_Read, 0, 0, width, height, block, pixelWidth, pixelHeight, ( GDALDataType ) mGdalDataType.at( bandNo - 1 ), 0, 0 ) != CE_None )
+        QgsDebugMsg( "Raster IO Error" );
       QgsMessageLog::logMessage( tr( "Received coverage has wrong size %1 x %2 (expected %3 x %4)" ).arg( width ).arg( height ).arg( pixelWidth ).arg( pixelHeight ), tr( "WCS" ) );
     }
   }