Added in some more support files for WMS.

git-svn-id: http://svn.osgeo.org/qgis/trunk@3478 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/qgsrasterdataprovider.cpp

@@ -0,0 +1,27 @@
+/***************************************************************************
+    qgsrasterdataprovider.cpp - DataProvider Interface for raster layers
+     --------------------------------------
+    Date                 : Mar 11, 2005
+    Copyright            : (C) 2005 by Brendan Morley
+    email                : morb at ozemail dot com dot au
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+/* $Id$ */
+
+#include "qgsrasterdataprovider.h"
+
+
+QgsRasterDataProvider::QgsRasterDataProvider()
+{
+
+}
+
+

src/qgsrasterdataprovider.h

@@ -0,0 +1,130 @@
+/***************************************************************************
+    qgsrasterdataprovider.h - DataProvider Interface for raster layers
+     --------------------------------------
+    Date                 : Mar 11, 2005
+    Copyright            : (C) 2005 by Brendan Morley
+    email                : morb at ozemail dot com dot au
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+/* $Id$ */
+
+/* Thank you to Marco Hugentobler for the original vector DataProvider */
+
+#ifndef QGSRASTERDATAPROVIDER_H
+#define QGSRASTERDATAPROVIDER_H
+
+#include <set>
+#include <map>
+#include <qobject.h>
+#include <qtextcodec.h>
+#include <qimage.h>
+
+#include "qgsdataprovider.h"
+#include "qgspoint.h"
+
+
+    //! Copied from QgsRasterProvider
+    struct QgsRasterViewPort
+{
+    /** \brief  The offset from the left hand edge of the raster for the rectangle that will be drawn to screen.
+     * TODO Check this explanation is correc!*/
+    int   rectXOffsetInt;
+    float rectXOffsetFloat;
+    /** \brief  The offset from the bottom edge of the raster for the rectangle that will be drawn to screen.
+     * TODO Check this explanation is correc!*/
+    int   rectYOffsetInt;
+    float rectYOffsetFloat;
+    /** \brief Lower left X dimension of clipped raster image in raster pixel space.
+     *  RasterIO will do the scaling for us, so for example, if the user is zoomed in a long way, there may only 
+     *  be e.g. 5x5 pixels retrieved from the raw raster data, but rasterio will seamlessly scale the up to 
+     *  whatever the screen coordinates are (e.g. a 600x800 display window) */
+    double clippedXMinDouble;
+    /** \brief Top Right X dimension of clipped raster image in raster pixel space.
+     *  RasterIO will do the scaling for us, so for example, if the user is zoomed in a long way, there may only 
+     *  be e.g. 5x5 pixels retrieved from the raw raster data, but rasterio will seamlessly scale the up to 
+     *  whatever the screen coordinates are (e.g. a 600x800 display window) */
+    double clippedXMaxDouble;
+    /** \brief Lower left Y dimension of clipped raster image in raster pixel space.
+     *  RasterIO will do the scaling for us, so for example, if the user is zoomed in a long way, there may only 
+     *  be e.g. 5x5 pixels retrieved from the raw raster data, but rasterio will seamlessly scale the up to 
+     *  whatever the screen coordinates are (e.g. a 600x800 display window) */
+    double clippedYMinDouble;
+    /** \brief Top Right X dimension of clipped raster image in raster pixel space.
+     *  RasterIO will do the scaling for us, so for example, if the user is zoomed in a long way, there may only 
+     *  be e.g. 5x5 pixels retrieved from the raw raster data, but rasterio will seamlessly scale the up to 
+     *  whatever the screen coordinates are (e.g. a 600x800 display window) */
+    double clippedYMaxDouble;
+    /** \brief  Distance in pixels from clippedXMinDouble to clippedXMaxDouble. */
+    int clippedWidthInt;
+    /** \brief Distance in pixels from clippedYMinDouble to clippedYMaxDouble  */
+    int clippedHeightInt;
+    /** \brief Coordinate (in geographic coordinate system) of top left corner of the part of the raster that 
+     * is to be rendered.*/
+    QgsPoint topLeftPoint;
+    /** \brief Coordinate (in geographic coordinate system) of bottom right corner of the part of the raster that 
+     * is to be rendered.*/
+    QgsPoint bottomRightPoint;
+    /** \brief Distance in map units from left edge to right edge for the part of the raster that 
+     * is to be rendered.*/
+    int drawableAreaXDimInt;
+    /** \brief Distance in map units from bottom edge to top edge for the part of the raster that 
+     * is to be rendered.*/
+    int drawableAreaYDimInt;
+};
+
+
+
+/** Base class for raster data providers
+ *
+ *  \note  This class has been copied and pasted from
+ *         QgsVectorDataProvider, and does not yet make
+ *         sense for Raster layers.
+ */
+ 
+class QgsRasterDataProvider : public QgsDataProvider
+{
+ 
+  Q_OBJECT
+     
+public:
+
+
+    QgsRasterDataProvider();
+
+    virtual ~QgsRasterDataProvider() {};
+
+    /**
+     * Add the list of WMS layer names to be rendered by this server
+     */
+    virtual void addLayers(QStringList layers) = 0;
+
+    // TODO: Document this better.
+    /** \brief   Renders the layer as an image
+     */
+    virtual QImage* draw(QgsRect viewExtent, int pixelWidth, int pixelHeight) = 0;
+
+    
+    
+        
+
+    // TODO: Get the supported formats by this provider
+    
+    // TODO: Get the file masks supported by this provider, suitable for feeding into the file open dialog box
+    
+
+
+    
+        
+protected:
+
+};
+
+#endif