GRASS raster rendered by default as pseudo color, color table loaded …

…from GRASS
qgis · Sep 5, 2012 · 08bd084 · 08bd084
1 parent 7b05793
commit 08bd084
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Showing 4 changed files with 29 additions and 8 deletions.
diff --git a/src/core/qgsrasterdataprovider.h b/src/core/qgsrasterdataprovider.h
@@ -76,7 +76,7 @@ class CORE_EXPORT QgsRasterDataProvider : public QgsDataProvider, public QgsRast
     {
       UndefinedColorInterpretation = 0,
       /*! Greyscale */                                      GrayIndex = 1,
-      /*! Paletted (see associated color table) */          PaletteIndex = 2,
+      /*! Paletted (see associated color table) */          PaletteIndex = 2, // indexed color table
       /*! Red band of RGBA image */                         RedBand = 3,
       /*! Green band of RGBA image */                       GreenBand = 4,
       /*! Blue band of RGBA image */                        BlueBand = 5,
@@ -91,7 +91,8 @@ class CORE_EXPORT QgsRasterDataProvider : public QgsDataProvider, public QgsRast
       /*! Y Luminance */                                    YCbCr_YBand = 14,
       /*! Cb Chroma */                                      YCbCr_CbBand = 15,
       /*! Cr Chroma */                                      YCbCr_CrBand = 16,
-      /*! Max current value */                              ColorInterpretationMax = 16
+      /*! Continuous palette, QGIS addition, GRASS */       ContinuousPalette = 17,
+      /*! Max current value */                              ColorInterpretationMax = 17
     };
 
     // Progress types

diff --git a/src/core/raster/qgsrasterlayer.cpp b/src/core/raster/qgsrasterlayer.cpp
@@ -1800,6 +1800,10 @@ void QgsRasterLayer::setDataProvider( QString const & provider )
   {
     mRasterType = Palette;
   }
+  else if ( mDataProvider->colorInterpretation( 1 ) == QgsRasterDataProvider::ContinuousPalette )
+  {
+    mRasterType = Palette;
+  }
   else
   {
     mRasterType = GrayOrUndefined;
@@ -1811,11 +1815,27 @@ void QgsRasterLayer::setDataProvider( QString const & provider )
     QgsDebugMsg( "Setting mDrawingStyle to SingleBandColorDataStyle " + QString::number( SingleBandColorDataStyle ) );
     setDrawingStyle( SingleBandColorDataStyle );
   }
-  else if ( mRasterType == Palette )
+  else if ( mRasterType == Palette && mDataProvider->colorInterpretation( 1 ) == QgsRasterDataProvider::PaletteIndex )
   {
-
     setDrawingStyle( PalettedColor ); //sensible default
   }
+  else if ( mRasterType == Palette && mDataProvider->colorInterpretation( 1 ) == QgsRasterDataProvider::ContinuousPalette )
+  {
+    setDrawingStyle( SingleBandPseudoColor );
+    // Load color table
+    QList<QgsColorRampShader::ColorRampItem> colorTable = mDataProvider->colorTable( 1 );
+    QgsSingleBandPseudoColorRenderer* r = dynamic_cast<QgsSingleBandPseudoColorRenderer*>( renderer() );
+    if ( r )
+    {
+      // TODO: this should go somewhere else
+      QgsRasterShader* shader = new QgsRasterShader();
+      QgsColorRampShader* colorRampShader = new QgsColorRampShader();
+      colorRampShader->setColorRampType( QgsColorRampShader::INTERPOLATED );
+      colorRampShader->setColorRampItemList( colorTable );
+      shader->setRasterShaderFunction( colorRampShader );
+      r->setShader( shader );
+    }
+  }
   else if ( mRasterType == Multiband )
   {
     setDrawingStyle( MultiBandColor );  //sensible default

diff --git a/src/providers/grass/qgis.g.info.c b/src/providers/grass/qgis.g.info.c
@@ -147,8 +147,8 @@ int main( int argc, char **argv )
       G_fatal_error(( "Unable to read range file" ) );
     }
     G_get_fp_range_min_max( &range, &zmin, &zmax );
-    fprintf( stdout, "MIN_VALUE:%f\n", zmin );
-    fprintf( stdout, "MAX_VALUE:%f\n", zmax );
+    fprintf( stdout, "MIN_VALUE:%.17e\n", zmin );
+    fprintf( stdout, "MAX_VALUE:%.17e\n", zmax );
   }
   else if ( strcmp( "colors", info_opt->answer ) == 0 )
   {
@@ -168,7 +168,7 @@ int main( int argc, char **argv )
         unsigned char r1, g1, b1, r2, g2, b2;
 
         G_get_f_color_rule( &val1, &r1, &g1, &b1, &val2, &r2, &g2, &b2, &colors, i );
-        fprintf( stdout, "%e %e %d %d %d %d %d %d\n", val1, val2, r1, g1, b1, r2, g2, b2 );
+        fprintf( stdout, "%.17e %.17e %d %d %d %d %d %d\n", val1, val2, r1, g1, b1, r2, g2, b2 );
       }
     }
   }

diff --git a/src/providers/grass/qgsgrassrasterprovider.cpp b/src/providers/grass/qgsgrassrasterprovider.cpp
@@ -493,7 +493,7 @@ int QgsGrassRasterProvider::colorInterpretation( int bandNo ) const
   QList<QgsColorRampShader::ColorRampItem> ct = colorTable( bandNo );
   if ( ct.size() > 0 )
   {
-    return QgsRasterDataProvider::PaletteIndex;
+    return QgsRasterDataProvider::ContinuousPalette;
   }
   return QgsRasterDataProvider::GrayIndex;
 }