private void mnuCaptureScreen_Click(object sender, System.EventArgs e)
{
picScreen.Image = CaptureScreen.GetDesktopImage();
}
// Public method to get A screen rectangle as ASCII text where screen is cleaned before
// recognition
public static string OCRSDK_Get_CleanedScreen_Ascii(int OCRSDK_ScrAx,
int OCRSDK_ScrAy,
int OCRSDK_ScrBx,
int OCRSDK_ScrBy)
{
int OCRSDK_Stat;
OCRSDK_Source_struct OCRSDK_Source;
OCRSDK_Dest_struct OCRSDK_Dest;
int OCRSDK_Dest_Fmt;
string retstring; // the string that is returned
// Filename of output .bmp file as a array for OCRSDK
// Got to use bytes because char is now the unicode crap
byte[] OCRSDKfilename = new byte[20];
OCRSDKfilename[0] = 0x73; // s
OCRSDKfilename[1] = 0x66; // f
OCRSDKfilename[2] = 0x2E; // .
OCRSDKfilename[3] = 0x62; // b
OCRSDKfilename[4] = 0x6D; // m
OCRSDKfilename[5] = 0x70; // p
OCRSDKfilename[6] = 0;
// Filename for C# System.IO classes is a (Unicode chars) string
string filename = "sf.bmp"; // C# filename
// They want a clean version we will be recognising from sf.bmp
// which we will build before the call to textract as follows
// 1. Capture the rectangle from a screen area
// 2. Clean the rectangle pixel by pixel so that any non white pixel is set black
// 3. write the bmp for the cleaned rectangle to cleanrect.bmp
// Capture from the screen rectangle into a Bitmap
// (I'll use my own code rather than the OCRSDK way to contain the unknowns)
// Get the raw Bitmap from the screen into mybmp1
Image screen_rect_img = CaptureScreen.GetDesktopImage();
Bitmap mybmp1 = new Bitmap(screen_rect_img);
// Clean it
// Can use a C# string for filename here
// And can also use the C# ref here
image_clean(ref mybmp1);
mybmp1.Save(filename, System.Drawing.Imaging.ImageFormat.Bmp);
// Check whether or Not OCRSDK has been inited and init if required
if (!OCRSDK_Inited)
{
// Set up and send a message about status before the call
OCRSDK_Stat = -1;
// System.Windows.Forms.MessageBox.Show("Goinginto OCRSDK TextractInit with = OCRSDK_Stat=" + OCRSDK_Stat);
// Make the call to init OCRSDK
OCRSDK_Stat = TextractInit();
//System.Windows.Forms.MessageBox.Show("Back from OCRSDK TextractInit with = OCRSDK_Stat=" + OCRSDK_Stat);
OCRSDK_Inited = true;
}
// Check whether or Not OCRSDK pattern file has been built and build if required
if (!OCRSDK_Built)
{
// Set up and send a message about status before the call
OCRSDK_Stat = -1;
//System.Windows.Forms.MessageBox.Show("Goinginto OCRSDK TextractBuild with = OCRSDK_Stat=" + OCRSDK_Stat);
// Make the call to init OCRSDK
OCRSDK_Stat = TextractBuild();
//System.Windows.Forms.MessageBox.Show("Back from OCRSDK TextractBuild with = OCRSDK_Stat=" + OCRSDK_Stat);
OCRSDK_Built = true;
}
// Fix the byte string for filename in memory while the OCRSDK.DLL does its foots around
//
fixed(byte *fixpointer = OCRSDKfilename)
{
// all this crap with fixpointer fixed so OCRSDKfilename is locked into memory
// and the memory manager will leave it alone
// shouldnt need to reset the filename - but it wont hurt
OCRSDKfilename[0] = 0x73; // s
OCRSDKfilename[1] = 0x66; // f
OCRSDKfilename[2] = 0x2E; // .
OCRSDKfilename[3] = 0x62; // b
OCRSDKfilename[4] = 0x6D; // m
OCRSDKfilename[5] = 0x70; // p
OCRSDKfilename[6] = 0;
// Source for recognition will be cleaned bmp file we created
OCRSDK_Source.OCRSDK_Source_Bmp = (byte *)fixpointer; // Pointer to a bmp file name char array
OCRSDK_Source.OCRSDK_Source_WindH = null; // Pointer to a Window Handle (not used)
OCRSDK_Source.OCRSDK_Source_Ax = 0; // Screen rectangle top LH X coord (not used)
OCRSDK_Source.OCRSDK_Source_Ay = 0; // Screen rectangle top LH X coord (not used)
OCRSDK_Source.OCRSDK_Source_Bx = 0; // Screen rectangle top LH X coord (not used)
OCRSDK_Source.OCRSDK_Source_By = 0; // Screen rectangle top LH X coord (not used)
// Set the destination the way we want it
OCRSDK_Dest.OCRSDK_Dest_Bmp = null; // Pointer to a bmp destination file name (not used)
// Set the format to Ascii
OCRSDK_Dest_Fmt = 0;
// Set up and send a message about status before the call
OCRSDK_Stat = -1;
//System.Windows.Forms.MessageBox.Show("Goinginto OCRSDK Textract from bmpfile with = OCRSDK_Stat="
// + OCRSDK_Stat);
// Make the call that should get text from the file sf.bmp
OCRSDK_Stat = Textract(&OCRSDK_Source, // Source structure pointer
&OCRSDK_Dest, // Dest structure pointer
OCRSDK_Dest_Fmt); // Required format
//System.Windows.Forms.MessageBox.Show("Backfrom OCRSDK Textract from bmpfile with = OCRSDK_Stat="
// + OCRSDK_Stat);
//System.Windows.Forms.MessageBox.Show("OCRSDK Textract No of chars found =" + OCRSDK_Dest.OCRSDK_Dest_Size);
} // Close out the scope where we fixed the pointer to the filename
// Examine and set the return string
// If there was nothing there return "" in the string, else return what OCRSDK found
if ((OCRSDK_Dest.OCRSDK_Dest_Size != 0)
&&
((sbyte *)OCRSDK_Dest.OCRSDK_Dest_Area != null))
{
// build a C# string (unicode chars etc etc) from the ASCII bytes in Dest_Area
string mystring = new string((sbyte *)OCRSDK_Dest.OCRSDK_Dest_Area, 0, OCRSDK_Dest.OCRSDK_Dest_Size);
retstring = mystring;
}
else
{
string mystring = "";
retstring = mystring;
}
// System.Windows.Forms.MessageBox.Show(" found =" + retstring);
return(retstring);
}// Ends OCRSDK_Get_CleanScreen_Ascii
