Ellipse : Draw an ellipse `[ 61 ]`

Description

Draws an ellipse with current draw and fill colors and current line width which ought to have been previously specified by respectively SetDrawColor(), SetFillColor() and SetLineWidth(). This function takes 5 parameters described below:

X ⇒ Float number which specifies abscissa or ellipse center
Y ⇒ Float number which specifies ordinate or ellipse center
RX ⇒ Float number which specifies ellipse horizontal radius
RY ⇒ Float number which specifies ellipse vertical radius
DF ⇒ String which specifies rendering mode:
- "D" for Draw,
- "F" for Fill,
- "DF" or "FD" for Draw and Fill

C calling syntax

void Ellipse (float x, float y, float rx, float ry, char *style)

Cobol calling syntax

CALL "Ellipse" using by value X,Y,RX,RY,STYLE.

C sample code

#include   "fpdf.h"

static char   f_ini ??(??) = ??< "ini??/??/demofpdf.ini" ??>;
static char   f_out ??(??) = ??< "pdf??/??/demo_b.pdf" ??>;

/* ----------------------------------------------------------------- */

int  main (int argc, char *argv [])

??<
int   ii;

NewPdfy (f_ini, 1);
AddPage ("P");
SetLineWidth (0.2);
SetFillColor (240, 240, 240);
SuperRect (10, 10, 190, 275, "DF", 1, 1, 1, 1);
SetDrawColor (16, 64, 240);
for (ii = 0; ii < 180; ii ++) {
    Rotate (ii * 2, 105, 145);
    Ellipse (105, 145, 30, 90, "D");
    }
Output (f_out);
??>

Cobol sample code

       Procedure division.
           String   'DD:FINI' Low-Value delimited by size into T0.
           String   'DD:FINI' Low-Value delimited by size into T0.
           MOVE  NB_PAGES TO I.
           CALL "NewPdfy" USING BY value Pt0, NB_PAGES.
      *
           String 'P' Low-Value delimited by size into T0.
           Call "AddPage" Using by value Pt0.
      *
           MOVE 0.2 TO LW.
           Call "SetLineWidth" Using by value LW.
      *
           MOVE 16   TO R.
           MOVE 32   TO G.
           MOVE 240 TO B.
           Call "SetFillColor" Using by value R,G,B.
           MOVE 1   TO RADIUS.
           MOVE 10   TO X.
           MOVE 10   TO Y.
           MOVE 190   TO W.
           MOVE 275   TO H.
           String  'DF' Low-Value delimited by size into T0.
           Call "SuperRect" Using by value X,Y,W,H,Pt0,RADIUS,RADIUS,RADIUS,RADIUS.
      *
           MOVE 16   TO R.
           MOVE 32   TO G.
           MOVE 240 TO B.
           Call "SetDrawColor" Using by value R,G,B.
      *
           MOVE 105 TO X.
           MOVE 145 TO Y.
           MOVE 180 TO N.
           MOVE 0 TO I.
           PERFORM UNTIL N <= 0
               COMPUTE ANGLE = I * 2
               Call "Rotate" Using by value Angle,X,Y.
               Call "Ellipse" Using by value X,Y,RX,RY,T0.
               SUBTRACT 1 FROM N
           END-PERFORM.
      *
           String  'DD:FOUT' Low-Value delimited by size into T0.
           Call "Output" Using by value Pt0.

Description of sample code

This piece of code creates an elementary rosette within a rounded corners rectangle, illustrating the use of following functions.
- SetLineWidth()  -->  Set the width of lines to be drawn
- SetDrawColor()  -->  Set the color of lines to be drawn
- SetFillColor()  -->  Set the color of area to be filled
- SuperRect()     -->  Draw a rounded corner rectangle
- Ellipse()       -->  Draw an ellipse
- Rotate()        -->  Rotate the XY coordinates of a given angle around a point

See sample source code in 'C' as well as PDF execution result - NB: For encrypted PDFs, user password is USER-PSWD

Ellipse : Draw an ellipse [ 61 ]

Ellipse : Draw an ellipse `[ 61 ]`