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POFastest way to draw shapes (Line, FilledRectangle, Rectangle etc)
 

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  1. POFastest way to draw shapes (Line, FilledRectangle, Rectangle etc)
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    <p>I am working on a project using .Net Compact Framework 3.5 using C# 3.0.</p> <p>I have a user control which receives data every 15 miliseconds and I have to draw shapes</p> <p>like lines, rectangle, filled rectangles on user control.</p> <p>I want to know what is the fastest way to draw these shapes, I am also open to use P/Invoke methods if there are some to increase performance and speed.</p> <p>The code I am using is as follows:</p> <pre><code> private void DrawThreeFunctions(Graphics g) { // drawing back functions if (DisplayFunction1.DrawOrder == DrawOrder.Back &amp;&amp; GraphDataArray.Length &gt; 0) { DrawFunction(g, DisplayFunction1, GraphDataArray[0]); } if (DisplayFunction2.DrawOrder == DrawOrder.Back &amp;&amp; GraphDataArray.Length &gt; 1) { DrawFunction(g, DisplayFunction2, GraphDataArray[1]); } if (DisplayFunction3.DrawOrder == DrawOrder.Back &amp;&amp; GraphDataArray.Length &gt; 2) { DrawFunction(g, DisplayFunction3, GraphDataArray[2]); } // drawing middle functions if (DisplayFunction1.DrawOrder == DrawOrder.Middle &amp;&amp; GraphDataArray.Length &gt; 0) { DrawFunction(g, DisplayFunction1, GraphDataArray[0]); } if (DisplayFunction2.DrawOrder == DrawOrder.Middle &amp;&amp; GraphDataArray.Length &gt; 1) { DrawFunction(g, DisplayFunction2, GraphDataArray[1]); } if (DisplayFunction3.DrawOrder == DrawOrder.Middle &amp;&amp; GraphDataArray.Length &gt; 2) { DrawFunction(g, DisplayFunction3, GraphDataArray[2]); } // drawing front functions if (DisplayFunction1.DrawOrder == DrawOrder.Front &amp;&amp; GraphDataArray.Length &gt; 0) { DrawFunction(g, DisplayFunction1, GraphDataArray[0]); } if (DisplayFunction2.DrawOrder == DrawOrder.Front &amp;&amp; GraphDataArray.Length &gt; 1) { DrawFunction(g, DisplayFunction2, GraphDataArray[1]); } if (DisplayFunction3.DrawOrder == DrawOrder.Front &amp;&amp; GraphDataArray.Length &gt; 2) { DrawFunction(g, DisplayFunction3, GraphDataArray[2]); } } private void DrawFunction(Graphics g, DisplayFunction function, int[] data) { Color color = Utils.GetColor(function.Color); switch (function.Shape) { case FunctionShape.StepLine: DrawStepLines(g, data, color); break; case FunctionShape.Rectangle: DrawFilledRectangles(g, data, color); break; case FunctionShape.FramedRectangle: DrawFramedRectangles(g, data, color); break; case FunctionShape.Line: DrawLines(g, data, color); break; default: break; } } #region Drawing methods // drawing lines private void DrawLines(Graphics g, int[] lineData, Color lineColor) { BarPositions = new List&lt;int&gt;(); List&lt;Point&gt; linePoints = new List&lt;Point&gt;(); int lineYPos = -1; int lineXPos = FirstBarDrawPosition; Point point = Point.Empty; using (Pen linePen = new Pen(lineColor, 2.0f)) { for (int i = FirstVisibleItemIndex, k = 0; i &lt; _indexLimit; i++, k++) { if (base.GetBarEndPosition(k) &gt; Width) break; lineXPos = GetTickPosition(k); BarPositions.Add(lineXPos); if (i &lt; lineData.Length) lineYPos = lineData[i]; else continue; point.X = lineXPos; point.Y = lineYPos; linePoints.Add(point); } if (linePoints.Any()) { g.DrawLines(linePen, linePoints.ToArray()); } } } // drawing framed rectangles private void DrawFramedRectangles(Graphics g, int[] functionValues, Color functionColor) { BarPositions = new List&lt;int&gt;(); int barXPos = FirstBarDrawPosition; Rectangle barRect = Rectangle.Empty; barRect.Width = WidthOfBar - 1; int barYPos = -1; using (Pen barPen = new Pen(functionColor)) { for (int i = FirstVisibleItemIndex, k = 0; i &lt; _indexLimit; i++, k++) { if (base.GetBarEndPosition(k) &gt; Width) return; BarPositions.Add(GetTickPosition(k)); if (i &lt; functionValues.Length) barYPos = functionValues[i]; else continue; //barRect = new Rectangle(); barRect.X = barXPos; barRect.Y = barYPos; //barRect.Width = WidthOfBar - 1; barRect.Height = Height - barYPos; g.DrawRectangle(barPen, barRect); barXPos += (WidthOfBar + DistanceBetweenBars); } } } // drawing filled rectangles private void DrawFilledRectangles(Graphics g, int[] functionValues, Color functionColor) { BarPositions = new List&lt;int&gt;(); int barXPos = FirstBarDrawPosition; Rectangle barRect = Rectangle.Empty; barRect.Width = WidthOfBar; int barYPos = -1; using (SolidBrush barBrush = new SolidBrush(functionColor)) { for (int i = FirstVisibleItemIndex, k = 0; i &lt; _indexLimit; i++, k++) { if (base.GetBarEndPosition(k) &gt; Width) return; BarPositions.Add(GetTickPosition(k)); if (i &lt; functionValues.Length) barYPos = functionValues[i]; else continue; //barRect = new Rectangle(); barRect.X = barXPos; barRect.Y = barYPos; //barRect.Width = WidthOfBar; barRect.Height = Height - barYPos; g.FillRectangle(barBrush, barRect); barXPos += (WidthOfBar + DistanceBetweenBars); } } } private void DrawStepLines(Graphics g, int[] lineData, Color lineColor) { BarPositions = new List&lt;int&gt;(); int lineYPos = -1; int barXPos = FirstBarDrawPosition; using (Pen linePen = new Pen(lineColor, 2.0f)) { for (int i = FirstVisibleItemIndex, k = 0; i &lt; _indexLimit; i++, k++) { if (base.GetBarEndPosition(k) &gt; Width) return; BarPositions.Add(GetTickPosition(k)); if (i &lt; lineData.Length) lineYPos = lineData[i]; else continue; // draw third function line //lineHeight = lineData[i]; g.DrawLine(linePen, barXPos, lineYPos, barXPos + WidthOfBar - 1, lineYPos); barXPos += (WidthOfBar + DistanceBetweenBars); } } } </code></pre> <p>I am using drawing order and shape like step line , line , framed rectangle ( just rectangle ) and rectangle is filled rectangle.</p> <p>Because of performance critical application I want to know the fastest way of drawing these shapes.</p> <p>Thanks in advance for any suggestion.</p>
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    1. USEmbedd_Khurja
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    1. COHave you checked that the standard functions are too slow? I think that they should be able to provide a decent animation of at least some 10fps. Which is quite enough for any human needs, because the human will need at least a second to react anyway. Any faster will make the animation smoother, perhaps, but it won't add any real value - just eye candy.
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      1. POFastest way to draw shapes (Line, FilledRectangle, Rectangle etc)
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    2. COProbably Flash is your best bet for an underpowered/mobile device.
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    3. CO@Vilx-: 15ms goes into 1 second about 67 times.
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      1. POFastest way to draw shapes (Line, FilledRectangle, Rectangle etc)
      1. USleppie
 

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