How to disable smoothing for Stroke ?

Question

Hello,
I am trying to boost performance of drawing, I am not using the built it Ink for InkCanvas, 
instead I am creating a System.Windows.Ink.Stroke and place it on a Canvas, then I add points 
to its StylusPointCollection when I have new points from input module ...
I couldn't use the built in drawing feature for InkCanvas, because I am not using a real mouse, instead, I just receive new coordinates and draw them
As a result, I didn't have the same performance of the built in drawing feature for InkCanvas 
How can I disable smoothing for System.Windows.Ink.Stroke ? I didn't find any related property for DrawingAttributes
So, any idea please ? 
Also, as for the InkCanvas, is it possible to use it's native ink drawing by just passing coordinates only ? 
if not, why its so fast ? what's the secret of its high sampling rate responsiveness ?<html:span id="textmarked_95" name="textmarker_96" style="background-color:#99ff99;"></html:span><html:span id="textmarked_94" name="textmarker_95" style="background-color:#99ff99;"></html:span><html:span id="textmarked_93" name="textmarker_94" style="background-color:#99ff99;"></html:span><html:span id="textmarked_92" name="textmarker_93" style="background-color:#99ff99;"></html:span><html:span id="textmarked_91" name="textmarker_92" style="background-color:#ccccff;"></html:span> :-)<html:span id="textmarked_89" name="textmarker_90" style="background-color:#99ff99;"></html:span><html:span id="textmarked_88" name="textmarker_89" style="background-color:#99ff99;"></html:span>
 Thanks in advance<html:span id="textmarked_86" name="textmarker_87" style="background-color:#99ff99;"></html:span><html:span id="textmarked_85" name="textmarker_86" style="background-color:#99ff99;"></html:span><html:span id="textmarked_84" name="textmarker_85" style="background-color:#99ff99;"></html:span>

---

hopewise

Answer 1

If you draw it by own code, the performance will be poor, the only way to improve your performance is collect the point, and when mouse up, you clear all points in collect and generate a Path object, and add this Path object to your Canvas.

the default InkCanvas draw by InkPresenter class

http://msdn.microsoft.com/en-us/library/system.windows.controls.inkpresenter.aspx

---

Stay hungry, stay foolish

Answer 2

> the only way to improve your performance is collect the point, and when mouse up, you clear all points in collect and generate a Path object

Do you mean that there is no way to draw real time ink with InkCanvas without using the mouse ? ( I want a way to send points to InkCanvas without using the mouse )

What about the first part of question, can I disable the smoothing for stroke ?

Thanks

---

hopewise

Answer 3

it will cause performance issue.

what is the meaning of "disable the smoothing for stroke"

---

Stay hungry, stay foolish

Answer 4

>what is the meaning of "disable the smoothing for stroke"

I mean to disable the anti-aliasing for the stroke I am drawing, please read the top of this thread again.

<html:span id="textmarked_7" name="textmarker_8" style="background-color:#99ff99;"></html:span><html:span id="textmarked_6" name="textmarker_7" style="background-color:#99ff99;"></html:span><html:span id="textmarked_5" name="textmarker_6" style="background-color:#ccccff;"></html:span><html:span id="textmarked_4" name="textmarker_5" style="background-color:#99ff99;"></html:span><html:span id="textmarked_3" name="textmarker_4" style="background-color:#99ff99;"></html:span><html:span id="textmarked_2" name="textmarker_3" style="background-color:#66cccc;"></html:span><html:span id="textmarked_1" name="textmarker_2" style="background-color:#99ff99;"></html:span><html:span id="textmarked_0" name="textmarker_1" style="background-color:#ccccff;"></html:span>

---

hopewise

Answer 5

Hi hopewise,

You could try to RenderOptions property:

 RenderOptions.EdgeMode="Aliased"

Best regards,

---

Sheldon _Xiao[MSFT]
MSDN Community Support | Feedback to us
Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 6

Thanks Sheldon, but, can't I draw on InkCanvas without mouse ? by sending points only ?

---

hopewise

Answer 7

Hi hopewise,

If you could add any objects to your InkCanvas, however, if you do not draw on InkCanvas, add point by point, it will cause performance issue.

best regards,

---

Sheldon _Xiao[MSFT]
MSDN Community Support | Feedback to us
Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 8

Hi,

I am pretty sure this is not applicable here, but anyway I share my idea here:
Couldn't SnapToDevicePixel help in having plain strokes?

Regards,

---

Charles HETIER http://www.charly-studio.com

Answer 9

What will speed my drawing is to use the same approach InkCanvas work when user draw by mouse .. can I use the same approach applied by InkCanvas ?

---

hopewise

Answer 10

The methods in inkcanvs class is internal, you cannot use it out of the assembly.

Maybe you can try to write this control by yourself and sharing with us.

 

---

NEU_ShieldEdge