Add native c++ algorithm provider

src/core/processing/qgsnativealgorithms.cpp

@@ -26,6 +26,43 @@
 
 ///@cond PRIVATE
 
+QgsNativeAlgorithms::QgsNativeAlgorithms( QObject *parent )
+  : QgsProcessingProvider( parent )
+{}
+
+QIcon QgsNativeAlgorithms::icon() const
+{
+  return QgsApplication::getThemeIcon( QStringLiteral( "/providerQgis.svg" ) );
+}
+
+QString QgsNativeAlgorithms::svgIconPath() const
+{
+  return QgsApplication::iconPath( QStringLiteral( "providerQgis.svg" ) );
+}
+
+QString QgsNativeAlgorithms::id() const
+{
+  return QStringLiteral( "native" );
+}
+
+QString QgsNativeAlgorithms::name() const
+{
+  return tr( "QGIS" );
+}
+
+bool QgsNativeAlgorithms::supportsNonFileBasedOutput() const
+{
+  return true;
+}
+
+void QgsNativeAlgorithms::loadAlgorithms()
+{
+  addAlgorithm( new QgsCentroidAlgorithm() );
+  addAlgorithm( new QgsBufferAlgorithm() );
+}
+
+
+
 QgsCentroidAlgorithm::QgsCentroidAlgorithm()
 {
   addParameter( new QgsProcessingParameterVector( QStringLiteral( "INPUT" ), QObject::tr( "Input layer" ) ) );

src/core/processing/qgsnativealgorithms.h

@@ -21,9 +21,28 @@
 #include "qgis_core.h"
 #include "qgis.h"
 #include "qgsprocessingalgorithm.h"
+#include "qgsprocessingprovider.h"
 
 ///@cond PRIVATE
 
+class QgsNativeAlgorithms: public QgsProcessingProvider
+{
+  public:
+
+    QgsNativeAlgorithms( QObject *parent = nullptr );
+
+    QIcon icon() const override;
+    QString svgIconPath() const override;
+    QString id() const override;
+    QString name() const override;
+    bool supportsNonFileBasedOutput() const override;
+
+  protected:
+
+    void loadAlgorithms() override;
+
+};
+
 /**
  * Native centroid algorithm.
  */
@@ -54,7 +73,7 @@ class QgsBufferAlgorithm : public QgsProcessingAlgorithm
 
     QgsBufferAlgorithm();
 
-    QString name() const override { return QStringLiteral( "fixeddistancebuffer" ); }
+    QString name() const override { return QStringLiteral( "buffer" ); }
     QString displayName() const override { return QObject::tr( "Buffer" ); }
     virtual QStringList tags() const override { return QObject::tr( "buffer,grow" ).split( ',' ); }
     QString group() const override { return QObject::tr( "Vector geometry tools" ); }

src/core/qgsapplication.cpp

@@ -40,6 +40,7 @@
 
 #include "gps/qgsgpsconnectionregistry.h"
 #include "processing/qgsprocessingregistry.h"
+#include "processing/qgsnativealgorithms.h"
 
 #include <QDir>
 #include <QFile>
@@ -1578,6 +1579,7 @@ QgsApplication::ApplicationMembers::ApplicationMembers()
   mGpsConnectionRegistry = new QgsGPSConnectionRegistry();
   mPluginLayerRegistry = new QgsPluginLayerRegistry();
   mProcessingRegistry = new QgsProcessingRegistry();
+  mProcessingRegistry->addProvider( new QgsNativeAlgorithms( mProcessingRegistry ) );
   mAnnotationRegistry = new QgsAnnotationRegistry();
 }