private void DrawPreview()
{
try
{
ImageCaptureInfo copy = imageCaptureInfo;
copy.captureSizeX = previewPictureBox.Width;
copy.captureSizeY = previewPictureBox.Height;
//Show something in the preview
previewImage = CaptureImageFullPreview(ref copy);
float crop_size_x = copy.actual_crop_size_x;
float crop_size_y = copy.actual_crop_size_y;
lastFullCapture = previewImage;
//Draw selection rectangle
DrawCaptureRectangleBitmap();
//Compute image crop coordinates according to selection rectangle
//Get raw image size from imageCaptureInfo.actual_crop_size to compute scaling between raw and rectangle coordinates
//Console.WriteLine("SIZE X: {0}, SIZE Y: {1}", imageCaptureInfo.actual_crop_size_x, imageCaptureInfo.actual_crop_size_y);
imageCaptureInfo.crop_coordinate_left = selectionRectanglePreviewBox.Left * (crop_size_x / previewPictureBox.Width);
imageCaptureInfo.crop_coordinate_right = selectionRectanglePreviewBox.Right * (crop_size_x / previewPictureBox.Width);
imageCaptureInfo.crop_coordinate_top = selectionRectanglePreviewBox.Top * (crop_size_y / previewPictureBox.Height);
imageCaptureInfo.crop_coordinate_bottom = selectionRectanglePreviewBox.Bottom * (crop_size_y / previewPictureBox.Height);
copy.crop_coordinate_left = selectionRectanglePreviewBox.Left * (crop_size_x / previewPictureBox.Width);
copy.crop_coordinate_right = selectionRectanglePreviewBox.Right * (crop_size_x / previewPictureBox.Width);
copy.crop_coordinate_top = selectionRectanglePreviewBox.Top * (crop_size_y / previewPictureBox.Height);
copy.crop_coordinate_bottom = selectionRectanglePreviewBox.Bottom * (crop_size_y / previewPictureBox.Height);
Bitmap full_cropped_capture = CaptureImageFullPreview(ref copy, useCrop: true);
croppedPreviewPictureBox.Image = full_cropped_capture;
lastFullCroppedCapture = full_cropped_capture;
copy.captureSizeX = captureSize.Width;
copy.captureSizeY = captureSize.Height;
//Show matching bins for preview
var capture = CaptureImage();
List <int> dummy;
List <int> dummy2;
int black_level = 0;
var features = FeatureDetector.featuresFromBitmap(capture, out dummy, out black_level, out dummy2);
int tempMatchingBins = 0;
var isLoading = FeatureDetector.compareFeatureVector(features.ToArray(), FeatureDetector.listOfFeatureVectorsEng, out tempMatchingBins, -1.0f, false);
lastFeatures = features;
lastDiagnosticCapture = capture;
lastMatchingBins = tempMatchingBins;
matchDisplayLabel.Text = Math.Round((Convert.ToSingle(tempMatchingBins) / Convert.ToSingle(FeatureDetector.listOfFeatureVectorsEng.GetLength(1))), 4).ToString();
}
catch (Exception ex)
{
Console.WriteLine("Error: " + ex.ToString());
}
}
public static Bitmap CaptureFromDisplay(ref ImageCaptureInfo info)
{
Bitmap b = new Bitmap((int)info.actual_crop_size_x, (int)info.actual_crop_size_y);
//Full screen capture
using (Graphics g = Graphics.FromImage(b))
{
g.CopyFromScreen((int)(info.center_of_frame_x - info.actual_crop_size_x / 2 + info.actual_offset_x),
(int)(info.center_of_frame_y - info.actual_crop_size_y / 2 + info.actual_offset_y), 0, 0, new Size((int)info.actual_crop_size_x, (int)info.actual_crop_size_y), CopyPixelOperation.SourceCopy);
}
b = ResizeImage(b, info.captureSizeX, info.captureSizeY);
return(b);
}
private void initImageCaptureInfo()
{
imageCaptureInfo = new ImageCaptureInfo();
selectionTopLeft = new Point(0, 0);
selectionBottomRight = new Point(previewPictureBox.Width, previewPictureBox.Height);
selectionRectanglePreviewBox = new Rectangle(selectionTopLeft.X, selectionTopLeft.Y, selectionBottomRight.X - selectionTopLeft.X, selectionBottomRight.Y - selectionTopLeft.Y);
imageCaptureInfo.featureVectorResolutionX = featureVectorResolutionX;
imageCaptureInfo.featureVectorResolutionY = featureVectorResolutionY;
imageCaptureInfo.captureSizeX = captureSize.Width;
imageCaptureInfo.captureSizeY = captureSize.Height;
imageCaptureInfo.cropOffsetX = cropOffsetX;
imageCaptureInfo.cropOffsetY = cropOffsetY;
imageCaptureInfo.captureAspectRatio = captureAspectRatioX / captureAspectRatioY;
}
//Should probably refactor this into some kind of struct, whatever...
public static void SizeAdjustedCropAndOffset(int device_width, int device_height, ref ImageCaptureInfo info)
{
var resolution_factor_x = (device_width / info.featureVectorResolutionX);
var resolution_factor_y = (device_height / info.featureVectorResolutionY);
info.actual_crop_size_x = info.captureSizeX * resolution_factor_x;
info.actual_crop_size_y = info.captureSizeY * resolution_factor_y;
//Scale offset depending on resolution
info.actual_offset_x = info.cropOffsetX * resolution_factor_x;
info.actual_offset_y = info.cropOffsetY * resolution_factor_y;
//Scale offset and sizes depending on actual vs. needed aspect ratio
if (((float)device_width / (float)device_height) > (info.captureAspectRatio))
{
var image_region = (float)device_height / (1.0f / info.captureAspectRatio);
//Aspect ratio is larger than original
var black_bar_width_total = (float)device_width - image_region;
//Compute space occupied by black border relative to total width
var adjust_factor = ((float)(device_width - black_bar_width_total) / (float)device_width);
//info.actual_crop_size_x *= adjust_factor;
//info.actual_offset_x *= adjust_factor;
}
else
{
var image_region = (float)device_width / (info.captureAspectRatio);
//Aspect ratio is larger than original
var black_bar_height_total = (float)device_height - image_region;
//Compute space occupied by black border relative to total width
var adjust_factor = ((float)(device_height - black_bar_height_total) / (float)device_height);
//info.actual_crop_size_y *= adjust_factor;
//info.actual_offset_y *= adjust_factor;
}
info.center_of_frame_x = device_width / 2;
info.center_of_frame_y = device_height / 2;
}
public static Bitmap PrintWindow(IntPtr hwnd, ref ImageCaptureInfo info, bool full = false, bool useCrop = false, float scalingValueFloat = 1.0f)
{
try
{
Rectangle rc;
DLLImportStuff.GetClientRect(hwnd, out rc);
Bitmap ret = new Bitmap(1, 1);
if (rc.Width < 0)
{
return(ret);
}
IntPtr hdcwnd = DLLImportStuff.GetDC(hwnd);
IntPtr hdc = DLLImportStuff.CreateCompatibleDC(hdcwnd);
rc.Width = (int)(rc.Width * scalingValueFloat);
rc.Height = (int)(rc.Height * scalingValueFloat);
if (useCrop)
{
//Change size according to selected crop
rc.Width = (int)(info.crop_coordinate_right - info.crop_coordinate_left);
rc.Height = (int)(info.crop_coordinate_bottom - info.crop_coordinate_top);
}
//Compute crop coordinates and width/ height based on resoution
ImageCapture.SizeAdjustedCropAndOffset(rc.Width, rc.Height, ref info);
float cropOffsetX = info.actual_offset_x;
float cropOffsetY = info.actual_offset_y;
if (full)
{
info.actual_offset_x = 0;
info.actual_offset_y = 0;
info.actual_crop_size_x = 2 * info.center_of_frame_x;
info.actual_crop_size_y = 2 * info.center_of_frame_y;
}
if (useCrop)
{
//Adjust for crop offset
info.center_of_frame_x += info.crop_coordinate_left;
info.center_of_frame_y += info.crop_coordinate_top;
}
IntPtr hbmp = DLLImportStuff.CreateCompatibleBitmap(hdcwnd, (int)info.actual_crop_size_x, (int)info.actual_crop_size_y);
DLLImportStuff.SelectObject(hdc, hbmp);
DLLImportStuff.BitBlt(hdc, 0, 0, (int)info.actual_crop_size_x, (int)info.actual_crop_size_y, hdcwnd, (int)(info.center_of_frame_x + info.actual_offset_x - info.actual_crop_size_x / 2),
(int)(info.center_of_frame_y + info.actual_offset_y - info.actual_crop_size_y / 2), DLLImportStuff.TernaryRasterOperations.SRCCOPY);
info.actual_offset_x = cropOffsetX;
info.actual_offset_y = cropOffsetY;
ret = (Bitmap)Image.FromHbitmap(hbmp).Clone();
DLLImportStuff.DeleteObject(hbmp);
DLLImportStuff.ReleaseDC(hwnd, hdcwnd);
DLLImportStuff.DeleteDC(hdc);
return(ResizeImage(ret, info.captureSizeX, info.captureSizeY));
}
catch (System.Runtime.InteropServices.ExternalException)
{
return(new Bitmap(10, 10));
}
}
private Bitmap CaptureImageFullPreview(ref ImageCaptureInfo imageCaptureInfo, bool useCrop = false)
{
Bitmap b = new Bitmap(1, 1);
//Full screen capture
if (processCaptureIndex < 0)
{
Screen selected_screen = Screen.AllScreens[-processCaptureIndex - 1];
Rectangle screenRect = selected_screen.Bounds;
screenRect.Width = (int)(screenRect.Width * scalingValueFloat);
screenRect.Height = (int)(screenRect.Height * scalingValueFloat);
Point screenCenter = new Point((int)(screenRect.Width / 2.0f), (int)(screenRect.Height / 2.0f));
if (useCrop)
{
//Change size according to selected crop
screenRect.Width = (int)(imageCaptureInfo.crop_coordinate_right - imageCaptureInfo.crop_coordinate_left);
screenRect.Height = (int)(imageCaptureInfo.crop_coordinate_bottom - imageCaptureInfo.crop_coordinate_top);
}
//Compute crop coordinates and width/ height based on resoution
ImageCapture.SizeAdjustedCropAndOffset(screenRect.Width, screenRect.Height, ref imageCaptureInfo);
imageCaptureInfo.actual_crop_size_x = 2 * imageCaptureInfo.center_of_frame_x;
imageCaptureInfo.actual_crop_size_y = 2 * imageCaptureInfo.center_of_frame_y;
if (useCrop)
{
//Adjust for crop offset
imageCaptureInfo.center_of_frame_x += imageCaptureInfo.crop_coordinate_left;
imageCaptureInfo.center_of_frame_y += imageCaptureInfo.crop_coordinate_top;
}
//Adjust for selected screen offset
imageCaptureInfo.center_of_frame_x += selected_screen.Bounds.X;
imageCaptureInfo.center_of_frame_y += selected_screen.Bounds.Y;
imageCaptureInfo.actual_offset_x = 0;
imageCaptureInfo.actual_offset_y = 0;
b = ImageCapture.CaptureFromDisplay(ref imageCaptureInfo);
imageCaptureInfo.actual_offset_x = cropOffsetX;
imageCaptureInfo.actual_offset_y = cropOffsetY;
}
else
{
IntPtr handle = new IntPtr(0);
if (processCaptureIndex >= processList.Length)
{
return(b);
}
if (processCaptureIndex != -1)
{
handle = processList[processCaptureIndex].MainWindowHandle;
}
//Capture from specific process
processList[processCaptureIndex].Refresh();
if ((int)handle == 0)
{
return(b);
}
b = ImageCapture.PrintWindow(handle, ref imageCaptureInfo, full: true, useCrop: useCrop, scalingValueFloat: scalingValueFloat);
}
return(b);
}
