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  1. Line • Attributes (X1, Y1, X2, Y2, Color) • The Line Based on Slope • Decision on the dx and dy • Loop on Greater (Counter of 1) • Increment of other (Slope) • Plot Pixels in the loop

  2. Line • ‘dx’, ‘dy’ to calculate the diffrence along x and y axis • ‘steps’ to calculate Loop counting • ‘xInc’, ‘yInc’ to calculate the Difference covered in each step • ‘x’ , ‘y’ to store current pixel position • ‘i’ as a loop variable

  3. Line • Calculate ‘dx’ as x2-x1,‘dy’ as y2-y1 • ‘steps’ will have the greater absolute value from ‘dx’ or ‘dy’ • ‘xInc’ is ‘dx’/’steps’ ,‘yInc’ is ‘dy’/’steps’ • ‘x’ is ‘x1’ • ‘y’ is ‘y1’ • Plot 1st pixel at ‘x’,’y’ using ‘color’ • Loop ‘k’ 1 to steps and ‘x’+=‘xInc’, ‘y’+=‘yInc’

  4. Rectangle • Attributes (X1,Y1,X2,Y2,Color) • Set of four Lines • Line 1(X1,Y1,X2,Y1) • Line 2(X1,Y2,X2,Y2) • Line 3(X1,Y1,X1,Y2) • Line 4(X2,Y1,X2,Y2)

  5. Button • Set of 8 Lines • Line 1(X1,Y1,X2,Y1, Silver) • Line 2(X1,Y2,X2,Y2, Black) • Line 3(X1,Y1,X1,Y2,Silver) • Line 4(X2,Y1,X2,Y2, Black) • Line 5(X1+1,Y1+1,X2-1,Y1+1, White) • Line 6(X1+1,Y2-1,X2-1,Y2-1,Gray) • Line 7(X1+1,Y1+1,X1+1,Y2-1,White) • Line 8(X2-1,Y1+1,X2-1,Y2-1, Gray)

  6. PolyGon • n no of Attributes • Set of n/2 no of lines • Filled or Open Shape • Parameters Array, and count of points

  7. Circle • Attributes ( xc, yc, radius, color) • ‘x’, ‘y’ as current points • ‘i’ to run loop 0 to 360 • ‘x’ is calculated as xc+radius*cos(rad) • ‘y’ is calculated as yc+radius*sin(rad) • Where rad is PI*deg/180

  8. Arc • Attributes ( xc, yc, radius,startAngle, endAngle , color) • ‘x’, ‘y’ as current points • ‘i’ to run loop start to end • ‘x’ is calculated as xc+radius*cos(rad) • ‘y’ is calculated as yc+radius*sin(rad) • Where rad is PI*deg/180

  9. Ellipse • Attributes ( xc, yc, Xradius,Yradius, color) • ‘x’, ‘y’ as current points • ‘i’ to run loop 0 to 360 • ‘x’ is calculated as xc+Xradius*cos(rad) • ‘y’ is calculated as yc+Yradius*sin(rad) • Where rad is PI*deg/180

  10. Elliptical Arc • Attributes ( xc, yc, Xradius,Yradius,start, end, color) • ‘x’, ‘y’ as current points • ‘i’ to run loop start to end • ‘x’ is calculated as xc+Xradius*cos(rad) • ‘y’ is calculated as yc+Yradius*sin(rad) • Where rad is PI*deg/180

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