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BUG-2203: Improving on the previous fixes, by locking to make sure things do not run parallel. This might risk a deadlock though.

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Krom, Robertus 2017-06-21 09:16:38 +02:00
commit fcab0a0f79
1 changed files with 99 additions and 74 deletions
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173
Greenshot/Drawing/FreehandContainer.cs
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@ -36,7 +36,10 @@ namespace Greenshot.Drawing {
public class FreehandContainer : DrawableContainer {
private static readonly float [] PointOffset = {0.5f, 0.25f, 0.75f};
[NonSerialized]
[NonSerialized]
private readonly object _freehandPathLock = new object();
[NonSerialized]
private GraphicsPath freehandPath = new GraphicsPath();
private Rectangle myBounds = Rectangle.Empty;
private Point lastMouse = Point.Empty;
@ -104,15 +107,21 @@ namespace Greenshot.Drawing {
if (GeometryHelper.Distance2D(previousPoint.X, previousPoint.Y, mouseX, mouseY) >= 2*EditorConfig.FreehandSensitivity) {
capturePoints.Add(new Point(mouseX, mouseY));
}
if (GeometryHelper.Distance2D(lastMouse.X, lastMouse.Y, mouseX, mouseY) >= EditorConfig.FreehandSensitivity) {
//path.AddCurve(new Point[]{lastMouse, new Point(mouseX, mouseY)});
freehandPath.AddLine(lastMouse, new Point(mouseX, mouseY));
lastMouse = new Point(mouseX, mouseY);
// Only re-calculate the bounds & redraw when we added something to the path
myBounds = Rectangle.Round(freehandPath.GetBounds());
Invalidate();
}
return true;
if (GeometryHelper.Distance2D(lastMouse.X, lastMouse.Y, mouseX, mouseY) < EditorConfig.FreehandSensitivity)
{
return true;
}
//path.AddCurve(new Point[]{lastMouse, new Point(mouseX, mouseY)});
lastMouse = new Point(mouseX, mouseY);
lock (_freehandPathLock)
{
freehandPath.AddLine(lastMouse, new Point(mouseX, mouseY));
// Only re-calculate the bounds & redraw when we added something to the path
myBounds = Rectangle.Round(freehandPath.GetBounds());
}
Invalidate();
return true;
}
/// <summary>
@ -130,25 +139,34 @@ namespace Greenshot.Drawing {
/// Here we recalculate the freehand path by smoothing out the lines with Beziers.
/// </summary>
private void RecalculatePath() {
isRecalculated = true;
// Dispose the previous path, if we have one
freehandPath?.Dispose();
freehandPath = new GraphicsPath();
lock (_freehandPathLock)
{
isRecalculated = true;
// Dispose the previous path, if we have one
freehandPath?.Dispose();
freehandPath = new GraphicsPath();
// Here we can put some cleanup... like losing all the uninteresting points.
if (capturePoints.Count >= 3) {
int index = 0;
while ((capturePoints.Count - 1) % 3 != 0) {
// duplicate points, first at 50% than 25% than 75%
capturePoints.Insert((int)(capturePoints.Count*PointOffset[index]), capturePoints[(int)(capturePoints.Count*PointOffset[index++])]);
}
freehandPath.AddBeziers(capturePoints.ToArray());
} else if (capturePoints.Count == 2) {
freehandPath.AddLine(capturePoints[0], capturePoints[1]);
}
// Here we can put some cleanup... like losing all the uninteresting points.
if (capturePoints.Count >= 3)
{
int index = 0;
while ((capturePoints.Count - 1) % 3 != 0)
{
// duplicate points, first at 50% than 25% than 75%
capturePoints.Insert((int)(capturePoints.Count * PointOffset[index]), capturePoints[(int)(capturePoints.Count * PointOffset[index++])]);
}
freehandPath.AddBeziers(capturePoints.ToArray());
}
else if (capturePoints.Count == 2)
{
freehandPath.AddLine(capturePoints[0], capturePoints[1]);
}
// Recalculate the bounds
myBounds = Rectangle.Round(freehandPath.GetBounds());
}
// Recalculate the bounds
myBounds = Rectangle.Round(freehandPath.GetBounds());
}
/// <summary>
@ -157,41 +175,48 @@ namespace Greenshot.Drawing {
/// <param name="graphics"></param>
/// <param name="renderMode"></param>
public override void Draw(Graphics graphics, RenderMode renderMode) {
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
using (Pen pen = new Pen(lineColor)) {
using (var pen = new Pen(lineColor)) {
pen.Width = lineThickness;
if (pen.Width > 0) {
// Make sure the lines are nicely rounded
pen.EndCap = LineCap.Round;
pen.StartCap = LineCap.Round;
pen.LineJoin = LineJoin.Round;
if (!(pen.Width > 0))
{
return;
}
// Make sure the lines are nicely rounded
pen.EndCap = LineCap.Round;
pen.StartCap = LineCap.Round;
pen.LineJoin = LineJoin.Round;
// Move to where we need to draw
graphics.TranslateTransform(Left, Top);
lock (_freehandPathLock)
{
if (isRecalculated && Selected && renderMode == RenderMode.EDIT)
{
DrawSelectionBorder(graphics, pen, freehandPath);
}
graphics.DrawPath(pen, freehandPath);
}
// Move to where we need to draw
graphics.TranslateTransform(Left,Top);
if (isRecalculated && Selected && renderMode == RenderMode.EDIT) {
DrawSelectionBorder(graphics, pen);
}
graphics.DrawPath(pen, freehandPath);
// Move back, otherwise everything is shifted
graphics.TranslateTransform(-Left,-Top);
}
// Move back, otherwise everything is shifted
graphics.TranslateTransform(-Left,-Top);
}
}
/// <summary>
/// Draw a selectionborder around the freehand path
/// </summary>
/// <param name="graphics"></param>
/// <param name="linePen"></param>
protected void DrawSelectionBorder(Graphics graphics, Pen linePen) {
using (Pen selectionPen = (Pen) linePen.Clone()) {
using (GraphicsPath selectionPath = (GraphicsPath) freehandPath.Clone()) {
/// <summary>
/// Draw a selectionborder around the freehand path
/// </summary>
/// <param name="graphics">Graphics</param>
/// <param name="linePen">Pen</param>
/// <param name="path">GraphicsPath</param>
protected static void DrawSelectionBorder(Graphics graphics, Pen linePen, GraphicsPath path) {
using (var selectionPen = (Pen) linePen.Clone()) {
using (var selectionPath = (GraphicsPath)path.Clone()) {
selectionPen.Width += 5;
selectionPen.Color = Color.FromArgb(120, Color.LightSeaGreen);
graphics.DrawPath(selectionPen, selectionPath);
@ -218,42 +243,42 @@ namespace Greenshot.Drawing {
}
}
/// <summary>
/// FreehandContainer are regarded equal if they are of the same type and their paths are equal.
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public override bool Equals(object obj) {
/// <summary>
/// FreehandContainer are regarded equal if they are of the same type and their paths are equal.
/// </summary>
/// <param name="obj">object</param>
/// <returns>bool</returns>
public override bool Equals(object obj) {
bool ret = false;
if(obj != null && GetType() == obj.GetType()) {
FreehandContainer other = obj as FreehandContainer;
if(other != null && freehandPath.Equals(other.freehandPath)) {
ret = true;
}
}
return ret;
if (obj == null || GetType() != obj.GetType())
{
return false;
}
var other = obj as FreehandContainer;
if (other != null && Equals(freehandPath, other.freehandPath)) {
ret = true;
}
return ret;
}
public override int GetHashCode() {
if (freehandPath == null)
lock (_freehandPathLock)
{
return 0;
return freehandPath?.GetHashCode() ?? 0;
}
return freehandPath.GetHashCode();
}
public override bool ClickableAt(int x, int y) {
bool returnValue = base.ClickableAt(x, y);
if (returnValue) {
if (freehandPath == null)
{
return false;
}
int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
using (var pen = new Pen(Color.White)) {
pen.Width = lineThickness + 10;
returnValue = freehandPath.IsOutlineVisible(x-Left,y-Top, pen);
}
lock (_freehandPathLock)
{
returnValue = freehandPath.IsOutlineVisible(x - Left, y - Top, pen);
}
}
}
return returnValue;
}