private void StitchScreenshot_(Size stitchOffset, IPositionProvider stitchProvider,
ICollection <SubregionForStitching> screenshotParts, Bitmap stitchedImage, double scaleRatio,
ICutProvider scaledCutProvider, float sizeRatio)
{
int index = 0;
logger_.Verbose($"enter: {nameof(stitchOffset)}: {{0}} ; {nameof(screenshotParts)}.Count: {{1}}, {nameof(scaleRatio)}: {{2}}",
stitchOffset, screenshotParts.Count, scaleRatio);
Stopwatch stopwatch = Stopwatch.StartNew();
foreach (SubregionForStitching partRegion in screenshotParts)
{
if (stopwatch.Elapsed > TimeSpan.FromMinutes(5))
{
logger_.Log("Still Running..."); // this is so CI systems won't kill the build due to lack of activity.
stopwatch.Restart();
}
logger_.Verbose("Part: {0}", partRegion);
// Scroll to the part's top/left
Point partAbsoluteLocationInCurrentFrame = partRegion.ScrollTo;
partAbsoluteLocationInCurrentFrame += stitchOffset;
Point scrollPosition = new Point(
(int)Math.Round(partAbsoluteLocationInCurrentFrame.X * sizeRatio),
(int)Math.Round(partAbsoluteLocationInCurrentFrame.Y * sizeRatio));
Point originPosition = stitchProvider.SetPosition(scrollPosition);
int dx = scrollPosition.X - originPosition.X;
int dy = scrollPosition.Y - originPosition.Y;
Point partPastePosition = partRegion.PasteLocation;
//partPastePosition.Offset(-fullarea.Left, -fullarea.Top);
partPastePosition.Offset(dx, dy);
// Actually taking the screenshot.
Thread.Sleep(waitBeforeScreenshots_);
using (Bitmap partImage = imageProvider_.GetImage())
using (Bitmap cutPart = scaledCutProvider.Cut(partImage))
{
Bitmap croppedPart;
Rectangle r = partRegion.PhysicalCropArea;
if ((r.Width * r.Height) != 0)
{
croppedPart = BasicImageUtils.Crop(cutPart, r);
}
else
{
croppedPart = cutPart;
}
Rectangle r2 = partRegion.LogicalCropArea;
using (Bitmap scaledPartImage = BasicImageUtils.ScaleImage(croppedPart, scaleRatio))
using (Bitmap scaledCroppedPartImage = BasicImageUtils.Crop(scaledPartImage, r2))
using (Graphics g = Graphics.FromImage(stitchedImage))
{
debugScreenshotsProvider_.Save(partImage, "partImage-" + originPosition.X + "_" + originPosition.Y);
debugScreenshotsProvider_.Save(cutPart, "cutPart-" + originPosition.X + "_" + originPosition.Y);
debugScreenshotsProvider_.Save(croppedPart, "croppedPart-" + originPosition.X + "_" + originPosition.Y);
debugScreenshotsProvider_.Save(scaledPartImage, "scaledPartImage-" + originPosition.X + "_" + originPosition.Y);
debugScreenshotsProvider_.Save(scaledCroppedPartImage, "scaledCroppedPartImage-" + partPastePosition.X + "_" + partPastePosition.Y);
logger_.Verbose("pasting part at {0}", partPastePosition);
g.DrawImage(scaledCroppedPartImage, partPastePosition);
}
if (!object.ReferenceEquals(croppedPart, cutPart))
{
croppedPart.Dispose();
}
debugScreenshotsProvider_.Save(stitchedImage, $"stitched_{index}_({partPastePosition.X}_{partPastePosition.Y})");
index++;
}
}
debugScreenshotsProvider_.Save(stitchedImage, "stitched");
}
/// <summary>
/// Encapsulates an algorithm for creating full-page images of a page.
/// </summary>
/// <param name="positionProvider">The position provider used for moving to the actual stitch points.</param>
/// <param name="region">The region to stitch. If <see cref="Region.Empty"/>, the entire image will be stitched.</param>
/// <param name="fullarea">The wanted area of the resulting image. If unknown, pass in <c>null</c> or <see cref="Region.Empty"/>.</param>
/// <param name="originProvider">A position provider used for saving the state before
/// starting the stitching, as well as moving to (0,0). The reason it is separated from
/// the <c>stitchProvider</c>is that the stitchProvider might have side-effects
/// (e.g., changing the CSS transform of the page can cause a layout change at the
/// top of the page), which we can avoid for the first screenshot (since it might be a
/// full page screenshot anyway).</param>
/// <param name="stitchOffset"></param>
/// <returns>The screenshot as Bitmap.</returns>
public Bitmap GetStitchedRegion(Region region, Region fullarea, IPositionProvider positionProvider,
IPositionProvider originProvider, Size stitchOffset)
{
ArgumentGuard.NotNull(region, nameof(region));
ArgumentGuard.NotNull(positionProvider, nameof(positionProvider));
logger_.Verbose("region: {0} ; fullarea: {1} ; positionProvider: {2}",
region, fullarea, positionProvider.GetType().Name);
Point originalStitchedState = positionProvider.GetCurrentPosition();
logger_.Verbose("region size: {0}, originalStitchedState: {1}", region, originalStitchedState);
PositionMemento originProviderState = originProvider.GetState();
logger_.Verbose("originProviderState: {0}", originProviderState);
originProvider.SetPosition(Point.Empty);
Thread.Sleep(waitBeforeScreenshots_);
Bitmap initialScreenshot = imageProvider_.GetImage();
Size initialPhysicalSize = initialScreenshot.Size;
SaveDebugScreenshotPart_(initialScreenshot, region.ToRectangle(), "initial");
IScaleProvider scaleProvider = scaleProviderFactory_.GetScaleProvider(initialScreenshot.Width);
double pixelRatio = 1 / scaleProvider.ScaleRatio;
Size initialSizeScaled = new Size((int)Math.Round(initialScreenshot.Width / pixelRatio), (int)Math.Round(initialScreenshot.Height / pixelRatio));
ICutProvider scaledCutProvider = cutProvider_.Scale(pixelRatio);
if (pixelRatio != 1 && !(scaledCutProvider is NullCutProvider))
{
initialScreenshot = cutProvider_.Cut(initialScreenshot);
debugScreenshotsProvider_.Save(initialScreenshot, "original-cut");
}
Region regionInScreenshot = GetRegionInScreenshot_(region, initialScreenshot, pixelRatio);
Bitmap croppedInitialScreenshot = CropScreenshot_(initialScreenshot, regionInScreenshot);
debugScreenshotsProvider_.Save(croppedInitialScreenshot, "cropped");
Bitmap scaledInitialScreenshot = BasicImageUtils.ScaleImage(croppedInitialScreenshot, scaleProvider);
if (!object.ReferenceEquals(scaledInitialScreenshot, croppedInitialScreenshot))
{
SaveDebugScreenshotPart_(scaledInitialScreenshot, regionInScreenshot.ToRectangle(), "scaled");
}
if (fullarea.IsEmpty)
{
Size entireSize;
try
{
entireSize = positionProvider.GetEntireSize();
logger_.Verbose("Entire size of region context: {0}", entireSize);
}
catch (EyesException e)
{
logger_.Log("WARNING: Failed to extract entire size of region context" + e.Message);
logger_.Log("Using image size instead: " + scaledInitialScreenshot.Width + "x" + scaledInitialScreenshot.Height);
entireSize = new Size(scaledInitialScreenshot.Width, scaledInitialScreenshot.Height);
}
// Notice that this might still happen even if we used
// "getImagePart", since "entirePageSize" might be that of a frame.
if (scaledInitialScreenshot.Width >= entireSize.Width && scaledInitialScreenshot.Height >= entireSize.Height)
{
logger_.Log("WARNING: Seems the image is already a full page screenshot.");
if (!object.ReferenceEquals(scaledInitialScreenshot, initialScreenshot))
{
initialScreenshot.Dispose();
}
return(scaledInitialScreenshot);
}
fullarea = new Region(Point.Empty, entireSize, CoordinatesTypeEnum.SCREENSHOT_AS_IS);
}
float currentFullWidth = fullarea.Width;
fullarea = sizeAdjuster_.AdjustRegion(fullarea, initialSizeScaled);
float sizeRatio = currentFullWidth / fullarea.Width;
logger_.Verbose("adjusted fullarea: {0}", fullarea);
Point scaledCropLocation = fullarea.Location;
Point physicalCropLocation = new Point(
(int)Math.Ceiling(scaledCropLocation.X * pixelRatio),
(int)Math.Ceiling(scaledCropLocation.Y * pixelRatio));
Rectangle sourceRegion;
if (regionInScreenshot.IsSizeEmpty)
{
Size physicalCropSize = new Size(initialPhysicalSize.Width - physicalCropLocation.X, initialPhysicalSize.Height - physicalCropLocation.Y);
sourceRegion = new Rectangle(physicalCropLocation, physicalCropSize);
}
else
{
// Starting with the screenshot we already captured at (0,0).
sourceRegion = regionInScreenshot.ToRectangle();
}
Rectangle scaledCroppedSourceRect = cutProvider_.ToRectangle(sourceRegion.Size);
scaledCroppedSourceRect.Offset(sourceRegion.Location);
Rectangle scaledCroppedSourceRegion = new Rectangle(
(int)Math.Ceiling(scaledCroppedSourceRect.X / pixelRatio),
(int)Math.Ceiling(scaledCroppedSourceRect.Y / pixelRatio),
(int)Math.Ceiling(scaledCroppedSourceRect.Width / pixelRatio),
(int)Math.Ceiling(scaledCroppedSourceRect.Height / pixelRatio));
Size scaledCropSize = scaledCroppedSourceRegion.Size;
// The screenshot part is a bit smaller than the screenshot size, in order to eliminate
// duplicate bottom/right-side scroll bars, as well as fixed position footers.
Size screenshotPartSize = new Size(
Math.Max(scaledCropSize.Width, MinScreenshotPartSize_),
Math.Max(scaledCropSize.Height, MinScreenshotPartSize_)
);
logger_.Verbose("Screenshot part size: {0}", screenshotPartSize);
// Getting the list of viewport regions composing the page (we'll take screenshot for each one).
Rectangle rectInScreenshot;
if (regionInScreenshot.IsSizeEmpty)
{
int x = Math.Max(0, fullarea.Left);
int y = Math.Max(0, fullarea.Top);
int w = Math.Min(fullarea.Width, scaledCropSize.Width);
int h = Math.Min(fullarea.Height, scaledCropSize.Height);
rectInScreenshot = new Rectangle(
(int)Math.Round(x * pixelRatio),
(int)Math.Round(y * pixelRatio),
(int)Math.Round(w * pixelRatio),
(int)Math.Round(h * pixelRatio));
}
else
{
rectInScreenshot = regionInScreenshot.Rectangle;
}
fullarea = CoerceImageSize_(fullarea);
ICollection <SubregionForStitching> screenshotParts = fullarea.GetSubRegions(screenshotPartSize, stitchOverlap_, pixelRatio, rectInScreenshot, logger_);
Bitmap stitchedImage = new Bitmap(fullarea.Width, fullarea.Height);
// Take screenshot and stitch for each screenshot part.
StitchScreenshot_(stitchOffset, positionProvider, screenshotParts, stitchedImage, scaleProvider.ScaleRatio, scaledCutProvider, sizeRatio);
positionProvider.SetPosition(originalStitchedState);
originProvider.RestoreState(originProviderState);
croppedInitialScreenshot.Dispose();
return(stitchedImage);
}