GetPageImageColorSpace Method (GdPicturePDF)
Returns the color space of an image, specified by its index within the currently selected page of the loaded PDF document.
public function GetPageImageColorSpace(
: Integer
): PdfColorSpace;
'Declaration
Public Function GetPageImageColorSpace( _
ByVal As Integer _
) As PdfColorSpace
Parameters
- ImageIdx
- The 0-based index of the image within the current page. It must be a value from 0 to GdPicturePDF.GetPageImageCount-1.
Return Value
A member of the PdfColorSpace enumeration. A color space of a specified image.
The GdPicturePDF.GetStat method can be subsequently used to determine if this method has been successful.
How to find out the colorspace of all images contained within the PDF document.
Dim caption As String = "Example: GetPageImageColorSpace"
Dim gdpicturePDF As New GdPicturePDF()
If gdpicturePDF.LoadFromFile("test.pdf", False) = GdPictureStatus.OK Then
Dim message As String = ""
Dim imageCount As Integer = 0
Dim colorspace As PdfColorSpace = PdfColorSpace.PdfColorSpaceUnknown
Dim pageCount As Integer = gdpicturePDF.GetPageCount()
Dim status As GdPictureStatus = gdpicturePDF.GetStat()
If (status = GdPictureStatus.OK) AndAlso (pageCount > 0) Then
For i As Integer = 1 To pageCount
If gdpicturePDF.SelectPage(i) = GdPictureStatus.OK Then
message = message + "Page nr." + i.ToString() + ":" + vbCrLf
imageCount = gdpicturePDF.GetPageImageCount()
status = gdpicturePDF.GetStat()
If (status = GdPictureStatus.OK) AndAlso (imageCount > 0) Then
For j As Integer = 0 To imageCount - 1
colorspace = gdpicturePDF.GetPageImageColorSpace(j)
status = gdpicturePDF.GetStat()
If status = GdPictureStatus.OK Then
message = message + "The image indexed as " + j.ToString() + " has the following color space: " + colorspace.ToString() + "." + vbCrLf
Else
message = message + "The GetPageImageColorSpace() method has failed for the image nr. " + j.ToString() + " with the status: " + status.ToString() + vbCrLf
End If
Next
Else
If status = GdPictureStatus.OK Then
message = message + "This page doesn't contain any image." + vbCrLf
Else
message = message + "The GetPageImageCount() method has failed for the page nr. " + i.ToString() + " with the status: " + status.ToString() + vbCrLf
End If
End If
Else
message = message + "The SelectPage() method has failed for the image nr. " + i.ToString() + " with the status: " + gdpicturePDF.GetStat().ToString() + vbCrLf
End If
Next
MessageBox.Show(message, caption)
Else
If status = GdPictureStatus.OK Then
MessageBox.Show("This file doesn't contain any page.", caption)
Else
MessageBox.Show("The GetPageCount() method has failed with the status: " + status.ToString(), caption)
End If
End If
Else
MessageBox.Show("The file can't be loaded.", caption)
End If
gdpicturePDF.Dispose()
string caption = "Example: GetPageImageColorSpace";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
if (gdpicturePDF.LoadFromFile("test.pdf", false) == GdPictureStatus.OK)
{
string message = "";
int imageCount = 0;
PdfColorSpace colorspace = PdfColorSpace.PdfColorSpaceUnknown;
int pageCount = gdpicturePDF.GetPageCount();
GdPictureStatus status = gdpicturePDF.GetStat();
if ((status == GdPictureStatus.OK) && (pageCount > 0))
{
for (int i = 1; i <= pageCount; i++)
{
if (gdpicturePDF.SelectPage(i) == GdPictureStatus.OK)
{
message = message + "Page nr." + i.ToString() + ":\n";
imageCount = gdpicturePDF.GetPageImageCount();
status = gdpicturePDF.GetStat();
if ((status == GdPictureStatus.OK) && (imageCount > 0))
{
for (int j = 0; j < imageCount; j++)
{
colorspace = gdpicturePDF.GetPageImageColorSpace(j);
status = gdpicturePDF.GetStat();
if (status == GdPictureStatus.OK)
message = message + "The image indexed as " + j.ToString() + " has the following colorspace: " + colorspace.ToString() + ".\n";
else
message = message + "The GetPageImageColorSpace() method has failed for the image nr. " + j.ToString() + " with the status: " + status.ToString() + "\n";
}
}
else
{
if (status == GdPictureStatus.OK)
message = message + "This page doesn't contain any image.\n";
else
message = message + "The GetPageImageCount() method has failed for the page nr. " + i.ToString() + " with the status: " + status.ToString() + "\n";
}
}
else
{
message = message + "The SelectPage() method has failed for the image nr. " + i.ToString() + " with the status: " + gdpicturePDF.GetStat().ToString() + "\n";
}
}
MessageBox.Show(message, caption);
}
else
{
if (status == GdPictureStatus.OK)
MessageBox.Show("This file doesn't contain any page.", caption);
else
MessageBox.Show("The GetPageCount() method has failed with the status: " + status.ToString(), caption);
}
}
else
MessageBox.Show("The file can't be loaded.", caption);
gdpicturePDF.Dispose();
