public static void Run()
{
// ExStart:ImageInformation
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_Images();
// Load the source PDF file
Document doc = new Document(dataDir + "ImageInformation.pdf");
// Define the default resolution for image
int defaultResolution = 72;
System.Collections.Stack graphicsState = new System.Collections.Stack();
// Define array list object which will hold image names
System.Collections.ArrayList imageNames = new System.Collections.ArrayList(doc.Pages[1].Resources.Images.Names);
// Insert an object to stack
graphicsState.Push(new System.Drawing.Drawing2D.Matrix(1, 0, 0, 1, 0, 0));
// Get all the operators on first page of document
foreach (Operator op in doc.Pages[1].Contents)
{
// Use GSave/GRestore operators to revert the transformations back to previously set
Aspose.Pdf.Operators.GSave opSaveState = op as Aspose.Pdf.Operators.GSave;
Aspose.Pdf.Operators.GRestore opRestoreState = op as Aspose.Pdf.Operators.GRestore;
// Instantiate ConcatenateMatrix object as it defines current transformation matrix.
Aspose.Pdf.Operators.ConcatenateMatrix opCtm = op as Aspose.Pdf.Operators.ConcatenateMatrix;
// Create Do operator which draws objects from resources. It draws Form objects and Image objects
Aspose.Pdf.Operators.Do opDo = op as Aspose.Pdf.Operators.Do;
if (opSaveState != null)
{
// Save previous state and push current state to the top of the stack
graphicsState.Push(((System.Drawing.Drawing2D.Matrix)graphicsState.Peek()).Clone());
}
else if (opRestoreState != null)
{
// Throw away current state and restore previous one
graphicsState.Pop();
}
else if (opCtm != null)
{
System.Drawing.Drawing2D.Matrix cm = new System.Drawing.Drawing2D.Matrix(
(float)opCtm.Matrix.A,
(float)opCtm.Matrix.B,
(float)opCtm.Matrix.C,
(float)opCtm.Matrix.D,
(float)opCtm.Matrix.E,
(float)opCtm.Matrix.F);
// Multiply current matrix with the state matrix
((System.Drawing.Drawing2D.Matrix)graphicsState.Peek()).Multiply(cm);
continue;
}
else if (opDo != null)
{
// In case this is an image drawing operator
if (imageNames.Contains(opDo.Name))
{
System.Drawing.Drawing2D.Matrix lastCTM = (System.Drawing.Drawing2D.Matrix)graphicsState.Peek();
// Create XImage object to hold images of first pdf page
XImage image = doc.Pages[1].Resources.Images[opDo.Name];
// Get image dimensions
double scaledWidth = Math.Sqrt(Math.Pow(lastCTM.Elements[0], 2) + Math.Pow(lastCTM.Elements[1], 2));
double scaledHeight = Math.Sqrt(Math.Pow(lastCTM.Elements[2], 2) + Math.Pow(lastCTM.Elements[3], 2));
// Get Height and Width information of image
double originalWidth = image.Width;
double originalHeight = image.Height;
// Compute resolution based on above information
double resHorizontal = originalWidth * defaultResolution / scaledWidth;
double resVertical = originalHeight * defaultResolution / scaledHeight;
// Display Dimension and Resolution information of each image
Console.Out.WriteLine(
string.Format(dataDir + "image {0} ({1:.##}:{2:.##}): res {3:.##} x {4:.##}",
opDo.Name, scaledWidth, scaledHeight, resHorizontal,
resVertical));
}
}
}
// ExEnd:ImageInformation
}
public static void Run()
{
// ExStart:ExtractBorder
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_Tables();
Document doc = new Document(dataDir + "input.pdf");
Stack graphicsState = new Stack();
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap((int)doc.Pages[1].PageInfo.Width, (int)doc.Pages[1].PageInfo.Height);
System.Drawing.Drawing2D.GraphicsPath graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
// Default ctm matrix value is 1,0,0,1,0,0
System.Drawing.Drawing2D.Matrix lastCTM = new System.Drawing.Drawing2D.Matrix(1, 0, 0, -1, 0, 0);
// System.Drawing coordinate system is top left based, while pdf coordinate system is low left based, so we have to apply the inversion matrix
System.Drawing.Drawing2D.Matrix inversionMatrix = new System.Drawing.Drawing2D.Matrix(1, 0, 0, -1, 0, (float)doc.Pages[1].PageInfo.Height);
System.Drawing.PointF lastPoint = new System.Drawing.PointF(0, 0);
System.Drawing.Color fillColor = System.Drawing.Color.FromArgb(0, 0, 0);
System.Drawing.Color strokeColor = System.Drawing.Color.FromArgb(0, 0, 0);
using (System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage(bitmap))
{
gr.SmoothingMode = SmoothingMode.HighQuality;
graphicsState.Push(new System.Drawing.Drawing2D.Matrix(1, 0, 0, 1, 0, 0));
// Process all the contents commands
foreach (Operator op in doc.Pages[1].Contents)
{
Aspose.Pdf.Operators.GSave opSaveState = op as Aspose.Pdf.Operators.GSave;
Aspose.Pdf.Operators.GRestore opRestoreState = op as Aspose.Pdf.Operators.GRestore;
Aspose.Pdf.Operators.ConcatenateMatrix opCtm = op as Aspose.Pdf.Operators.ConcatenateMatrix;
Aspose.Pdf.Operators.MoveTo opMoveTo = op as Aspose.Pdf.Operators.MoveTo;
Aspose.Pdf.Operators.LineTo opLineTo = op as Aspose.Pdf.Operators.LineTo;
Aspose.Pdf.Operators.Re opRe = op as Aspose.Pdf.Operators.Re;
Aspose.Pdf.Operators.EndPath opEndPath = op as Aspose.Pdf.Operators.EndPath;
Aspose.Pdf.Operators.Stroke opStroke = op as Aspose.Pdf.Operators.Stroke;
Aspose.Pdf.Operators.Fill opFill = op as Aspose.Pdf.Operators.Fill;
Aspose.Pdf.Operators.EOFill opEOFill = op as Aspose.Pdf.Operators.EOFill;
Aspose.Pdf.Operators.SetRGBColor opRGBFillColor = op as Aspose.Pdf.Operators.SetRGBColor;
Aspose.Pdf.Operators.SetRGBColorStroke opRGBStrokeColor = op as Aspose.Pdf.Operators.SetRGBColorStroke;
if (opSaveState != null)
{
// Save previous state and push current state to the top of the stack
graphicsState.Push(((System.Drawing.Drawing2D.Matrix)graphicsState.Peek()).Clone());
lastCTM = (System.Drawing.Drawing2D.Matrix)graphicsState.Peek();
}
else if (opRestoreState != null)
{
// Throw away current state and restore previous one
graphicsState.Pop();
lastCTM = (System.Drawing.Drawing2D.Matrix)graphicsState.Peek();
}
else if (opCtm != null)
{
System.Drawing.Drawing2D.Matrix cm = new System.Drawing.Drawing2D.Matrix(
(float)opCtm.Matrix.A,
(float)opCtm.Matrix.B,
(float)opCtm.Matrix.C,
(float)opCtm.Matrix.D,
(float)opCtm.Matrix.E,
(float)opCtm.Matrix.F);
// Multiply current matrix with the state matrix
((System.Drawing.Drawing2D.Matrix)graphicsState.Peek()).Multiply(cm);
lastCTM = (System.Drawing.Drawing2D.Matrix)graphicsState.Peek();
}
else if (opMoveTo != null)
{
lastPoint = new System.Drawing.PointF((float)opMoveTo.X, (float)opMoveTo.Y);
}
else if (opLineTo != null)
{
System.Drawing.PointF linePoint = new System.Drawing.PointF((float)opLineTo.X, (float)opLineTo.Y);
graphicsPath.AddLine(lastPoint, linePoint);
lastPoint = linePoint;
}
else if (opRe != null)
{
System.Drawing.RectangleF re = new System.Drawing.RectangleF((float)opRe.X, (float)opRe.Y, (float)opRe.Width, (float)opRe.Height);
graphicsPath.AddRectangle(re);
}
else if (opEndPath != null)
{
graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
}
else if (opRGBFillColor != null)
{
fillColor = opRGBFillColor.getColor();
}
else if (opRGBStrokeColor != null)
{
strokeColor = opRGBStrokeColor.getColor();
}
else if (opStroke != null)
{
graphicsPath.Transform(lastCTM);
graphicsPath.Transform(inversionMatrix);
gr.DrawPath(new System.Drawing.Pen(strokeColor), graphicsPath);
graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
}
else if (opFill != null)
{
graphicsPath.FillMode = FillMode.Winding;
graphicsPath.Transform(lastCTM);
graphicsPath.Transform(inversionMatrix);
gr.FillPath(new System.Drawing.SolidBrush(fillColor), graphicsPath);
graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
}
else if (opEOFill != null)
{
graphicsPath.FillMode = FillMode.Alternate;
graphicsPath.Transform(lastCTM);
graphicsPath.Transform(inversionMatrix);
gr.FillPath(new System.Drawing.SolidBrush(fillColor), graphicsPath);
graphicsPath = new System.Drawing.Drawing2D.GraphicsPath();
}
}
}
dataDir = dataDir + "ExtractBorder_out.png";
bitmap.Save(dataDir, ImageFormat.Png);
// ExEnd:ExtractBorder
Console.WriteLine("\nBorder extracted successfully as image.\nFile saved at " + dataDir);
}
