// ArcGIS Snippet Title:
// Create JPEG (hi-resolution) from ActiveView
//
// Long Description:
// Creates a .jpg (JPEG) file from IActiveView using a high resolution exporting option. Default values of 96 DPI are overwritten to 300 used for the image creation.
//
// Add the following references to the project:
// ESRI.ArcGIS.Carto
// ESRI.ArcGIS.Display
// ESRI.ArcGIS.Geometry
// ESRI.ArcGIS.Output
//
// Intended ArcGIS Products for this snippet:
// ArcGIS Desktop (ArcEditor, ArcInfo, ArcView)
// ArcGIS Engine
// ArcGIS Server
//
// Applicable ArcGIS Product Versions:
// 9.2
// 9.3
// 9.3.1
// 10.0
//
// Required ArcGIS Extensions:
// (NONE)
//
// Notes:
// This snippet is intended to be inserted at the base level of a Class.
// It is not intended to be nested within an existing Method.
//
///<summary>Creates a .jpg (JPEG) file from the ActiveView using a high resolution exporting option. Default values of 96 DPI are overwritten to 300 used for the image creation.</summary>
///
///<param name="activeView">An IActiveView interface</param>
///<param name="pathFileName">A System.String that the path and filename of the JPEG you want to create. Example: "C:\temp\hiResolutionTest.jpg"</param>
///
///<returns>A System.Boolean indicating the success</returns>
///
///<remarks></remarks>
public System.Boolean CreateJPEGHiResolutionFromActiveView(ESRI.ArcGIS.Carto.IActiveView activeView, System.String pathFileName)
{
//parameter check
if (activeView == null || !(pathFileName.EndsWith(".jpg")))
{
return(false);
}
ESRI.ArcGIS.Output.IExport export = (IExport) new ESRI.ArcGIS.Output.ExportJPEG();
export.ExportFileName = pathFileName;
// Because we are exporting to a resolution that differs from screen
// resolution, we should assign the two values to variables for use
// in our sizing calculations
System.Int32 screenResolution = 96;
System.Int32 outputResolution = 300;
export.Resolution = outputResolution;
tagRECT exportRECT; // This is a structure
exportRECT.left = 0;
exportRECT.top = 0;
exportRECT.right = activeView.ExportFrame.right * (outputResolution / screenResolution);
exportRECT.bottom = activeView.ExportFrame.bottom * (outputResolution / screenResolution);
// Set up the PixelBounds envelope to match the exportRECT
ESRI.ArcGIS.Geometry.IEnvelope envelope = new ESRI.ArcGIS.Geometry.EnvelopeClass();
envelope.PutCoords(exportRECT.left, exportRECT.top, exportRECT.right, exportRECT.bottom);
export.PixelBounds = envelope;
System.Int32 hDC = export.StartExporting();
activeView.Output(hDC, (System.Int16)export.Resolution, ref exportRECT, null, null); // Explicit Cast and 'ref' keyword needed
export.FinishExporting();
export.Cleanup();
return(true);
}
protected override void OnClick()
{
// Get the min/max zoom from user input
int minzoom = 0;
int maxzoom = 6;
Ecotrust.Form1 form1 = new Ecotrust.Form1();
if (form1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
minzoom = (int)form1.numericUpDown1.Value;
maxzoom = (int)form1.numericUpDown2.Value;
}
else
{
return; //TODO
}
// Use the FolderBrowserDialog Class to choose export folder
System.Windows.Forms.FolderBrowserDialog folderDialog = new System.Windows.Forms.FolderBrowserDialog();
folderDialog.Description = "Select output folder for map tiles...";
string exportDir = "";
if (folderDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
// The returned string will be the full path, filename and file-extension for the chosen shapefile. Example: "C:\test\cities.shp"
exportDir = folderDialog.SelectedPath;
if (exportDir == "")
{
return; // TODO raise error
}
}
else
{
return; //TODO
}
ESRI.ArcGIS.ArcMapUI.IMxDocument mxDocument = ArcMap.Application.Document as ESRI.ArcGIS.ArcMapUI.IMxDocument; // Dynamic Cast
ESRI.ArcGIS.Carto.IActiveView activeView = mxDocument.ActiveView;
ESRI.ArcGIS.Carto.IMap map = activeView.FocusMap;
ESRI.ArcGIS.Geometry.IEnvelope mapaoi = activeView.Extent;
// Set up export object and tile pixel coordinates
int tileSizeX = 256;
int tileSizeY = 256;
// set up exporter with transparent background
ESRI.ArcGIS.Output.IExportPNG pngexport = new ESRI.ArcGIS.Output.ExportPNGClass();
ESRI.ArcGIS.Display.IColor tcolor = new ESRI.ArcGIS.Display.RgbColorClass();
// Warning: 254,254,254 will be set to transparent; don't use in any of map styling
((IRgbColor)tcolor).Red = 254;
((IRgbColor)tcolor).Green = 254;
((IRgbColor)tcolor).Blue = 254;
((ExportPNG)pngexport).BackgroundColor = tcolor;
pngexport.TransparentColor = tcolor;
ESRI.ArcGIS.Output.IExport export = (ESRI.ArcGIS.Output.IExport)pngexport;
ESRI.ArcGIS.esriSystem.tagRECT exportRECT;
exportRECT.left = 0;
exportRECT.top = 0;
exportRECT.right = tileSizeX;
exportRECT.bottom = tileSizeY;
ESRI.ArcGIS.Geometry.IEnvelope envelope = new ESRI.ArcGIS.Geometry.EnvelopeClass();
envelope.PutCoords(exportRECT.left, exportRECT.top, exportRECT.right, exportRECT.bottom);
export.PixelBounds = envelope;
map.DelayDrawing(true);
// Turn off all layers
for (int i = 0; i < map.LayerCount; i++)
{
map.get_Layer(i).Visible = false;
}
// Calculate total number of tiles needed
GlobalMercator mercator = new GlobalMercator();
GlobalMercator.Coords tempmins;
GlobalMercator.Coords tempmaxs;
Double numTiles = 0;
for (int tz = minzoom; tz <= maxzoom; tz++)
{
tempmins = mercator.MetersToTile(mapaoi.XMin, mapaoi.YMin, tz);
tempmaxs = mercator.MetersToTile(mapaoi.XMax, mapaoi.YMax, tz);
numTiles += ((tempmaxs.y - tempmins.y) + 1) * ((tempmaxs.x - tempmins.x) + 1);
}
numTiles *= map.LayerCount;
ESRI.ArcGIS.esriSystem.IStatusBar statusBar = ArcMap.Application.StatusBar;
statusBar.set_Message(0, "Rendering " + numTiles.ToString() + " tiles");
// Create a CancelTracker
ESRI.ArcGIS.esriSystem.ITrackCancel trackCancel = new ESRI.ArcGIS.Display.CancelTrackerClass();
ESRI.ArcGIS.Framework.IProgressDialogFactory progressDialogFactory = new ESRI.ArcGIS.Framework.ProgressDialogFactoryClass();
// Set the properties of the Step Progressor
System.Int32 int32_hWnd = ArcMap.Application.hWnd;
ESRI.ArcGIS.esriSystem.IStepProgressor stepProgressor = progressDialogFactory.Create(trackCancel, int32_hWnd);
stepProgressor.MinRange = 0;
stepProgressor.MaxRange = (int)numTiles;
stepProgressor.StepValue = 1;
stepProgressor.Message = "Calculating " + numTiles.ToString() + " tiles";
// Create the ProgressDialog. This automatically displays the dialog
ESRI.ArcGIS.Framework.IProgressDialog2 progressDialog2 = (ESRI.ArcGIS.Framework.IProgressDialog2)stepProgressor; // Explict Cast
// Set the properties of the ProgressDialog
progressDialog2.CancelEnabled = true;
progressDialog2.Description = "Rendering " + numTiles.ToString() + " map tiles";
progressDialog2.Title = "Creating map tiles...";
progressDialog2.Animation = ESRI.ArcGIS.Framework.esriProgressAnimationTypes.esriDownloadFile;
System.Boolean boolean_Continue = true;
int tileCount = 0;
for (int lyrnum = 0; lyrnum < map.LayerCount; lyrnum++)
{
// Turn on the layer of interest
ESRI.ArcGIS.Carto.ILayer layer = map.get_Layer(lyrnum);
layer.Visible = true;
// Set extents
//ESRI.ArcGIS.Geometry.IEnvelope layeraoi = layer.AreaOfInterest;
ESRI.ArcGIS.Geometry.IEnvelope aoi = new ESRI.ArcGIS.Geometry.EnvelopeClass();
// Create layer directory if it doesn't exist
DirectoryInfo dir = new DirectoryInfo(exportDir + "\\" + layer.Name);
if (!dir.Exists)
{
dir.Create();
}
DateTime startTime = DateTime.Now;
// Loop through zoom levels, rows, cols
for (int tz = minzoom; tz <= maxzoom; tz++)
{
GlobalMercator.Coords mins = mercator.MetersToTile(mapaoi.XMin, mapaoi.YMin, tz);
GlobalMercator.Coords maxs = mercator.MetersToTile(mapaoi.XMax, mapaoi.YMax, tz);
// Create zoom directory if it doesn't exist
DirectoryInfo dir2 = new DirectoryInfo(dir.FullName + "\\" + tz);
if (!dir2.Exists)
{
dir2.Create();
}
for (int tx = (int)mins.x; tx <= (int)maxs.x; tx++)
{
// Create X directory if it doesn't exist
DirectoryInfo dir3 = new DirectoryInfo(dir2.FullName + "\\" + tx);
if (!dir3.Exists)
{
dir3.Create();
}
for (int ty = (int)mins.y; ty <= (int)maxs.y; ty++)
{
// Flip y-axis for output tile name
int invertTy = (int)((Math.Pow(2, tz) - 1) - ty);
tileCount += 1;
// TODO Calculate time and set new message
// TimeSpan timeElapsed = TimeSpan.FromTicks(DateTime.Now.Subtract(startTime).Ticks); // * ((double)tileCount - (numTiles + 1)) / (numTiles + 1));
// double timeRemaining = (timeElapsed.TotalSeconds / (tileCount / numTiles)) - timeElapsed.TotalSeconds;
//(" + ((int)timeRemaining).ToString() +" remaining)";
stepProgressor.Message = layer.Name + "\\" + tz + "\\" + tx + "\\" + invertTy +
".png (" + tileCount + " of " + numTiles + ")";
export.ExportFileName = dir3.FullName + "\\" + invertTy + ".png";
GlobalMercator.Bounds bnd = mercator.TileBounds(tx, ty, tz);
aoi.PutCoords(bnd.minx, bnd.miny, bnd.maxx, bnd.maxy);
aoi.SpatialReference = map.SpatialReference; // TODO aoi spatial reference == mercator?
// Use FullExtent instead of Extent to make the extent independent of the activeView ratio
activeView.FullExtent = aoi;
// Export
System.Int32 hDC = export.StartExporting();
activeView.Output(hDC, (System.Int16)export.Resolution, ref exportRECT, null, null); // Explicit Cast and 'ref' keyword needed
export.FinishExporting();
export.Cleanup();
stepProgressor.Position = tileCount;
//Check if the cancel button was pressed. If so, break out of row
boolean_Continue = trackCancel.Continue();
if (!boolean_Continue)
{
break;
}
}
//Check if the cancel button was pressed. If so, break out of col
boolean_Continue = trackCancel.Continue();
if (!boolean_Continue)
{
break;
}
}
//Check if the cancel button was pressed. If so, break out of layers
boolean_Continue = trackCancel.Continue();
if (!boolean_Continue)
{
break;
}
// Write log
using (System.IO.StreamWriter file = new System.IO.StreamWriter(exportDir + "\\log.txt", true))
{
file.WriteLine(layer.Name + ", zoom " + tz + ", numtiles " + tileCount + ":" +
mins.x + " " + mins.y + " " + maxs.x + " " + maxs.y);
}
}
// Turn it off
layer.Visible = false;
}
map.DelayDrawing(false);
// Turn ON all layers
for (int i = 0; i < map.LayerCount; i++)
{
map.get_Layer(i).Visible = true;
}
// restore extent
activeView.FullExtent = mapaoi;
activeView.Refresh();
// Done
trackCancel = null;
stepProgressor = null;
progressDialog2.HideDialog();
progressDialog2 = null;
}