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Imager-1.012
River stage three • 108 direct dependents • 121 total dependents
65 ++
/ draw.c
i_arc(im, x, y, rad, d1, d2, color)

Fills an arc centered at (x,y) with radius rad covering the range of angles in degrees from d1 to d2, with the color.

i_arc_cfill(im, x, y, rad, d1, d2, fill)

Fills an arc centered at (x,y) with radius rad covering the range of angles in degrees from d1 to d2, with the fill object.

i_arc_aa(im, x, y, rad, d1, d2, color)

Anti-alias fills an arc centered at (x,y) with radius rad covering the range of angles in degrees from d1 to d2, with the color.

i_arc_aa_cfill(im, x, y, rad, d1, d2, fill)

Anti-alias fills an arc centered at (x,y) with radius rad covering the range of angles in degrees from d1 to d2, with the fill object.

i_circle_aa(im, x, y, rad, color)

Anti-alias fills a circle centered at (x,y) for radius rad with color.

i_circle_aa_fill(im, x, y, rad, fill)

Anti-alias fills a circle centered at (x,y) for radius rad with fill.

i_circle_out(im, x, y, r, col)

Draw a circle outline centered at (x,y) with radius r, non-anti-aliased.

Parameters:

  • (x, y) - the center of the circle

  • r - the radius of the circle in pixels, must be non-negative

Returns non-zero on success.

Implementation:

arc_seg(angle)

Convert an angle in degrees into an angle measure we can generate simply from the numbers we have when drawing the circle.

i_arc_out(im, x, y, r, d1, d2, col)

Draw an arc outline centered at (x,y) with radius r, non-anti-aliased over the angle range d1 through d2 degrees.

Parameters:

  • (x, y) - the center of the circle

  • r - the radius of the circle in pixels, must be non-negative

  • d1, d2 - the range of angles to draw the arc over, in degrees.

Returns non-zero on success.

Implementation:

i_circle_out_aa(im, xc, yc, r, col)

Draw a circle outline centered at (x,y) with radius r, anti-aliased.

Parameters:

  • (xc, yc) - the center of the circle

  • r - the radius of the circle in pixels, must be non-negative

  • col - an i_color for the color to draw in.

Returns non-zero on success.

i_arc_out_aa(im, xc, yc, r, d1, d2, col)

Draw a circle arc outline centered at (x,y) with radius r, from angle d1 degrees through angle d2 degrees, anti-aliased.

Parameters:

  • (xc, yc) - the center of the circle

  • r - the radius of the circle in pixels, must be non-negative

  • d1, d2 - the range of angle in degrees to draw the arc through. If d2-d1 >= 360 a full circle is drawn.

Returns non-zero on success.

i_box(im, x1, y1, x2, y2, color)

Outlines the box from (x1,y1) to (x2,y2) inclusive with color.

i_box_filled(im, x1, y1, x2, y2, color)

Fills the box from (x1,y1) to (x2,y2) inclusive with color.

i_box_filledf(im, x1, y1, x2, y2, color)

Fills the box from (x1,y1) to (x2,y2) inclusive with a floating point color.

i_box_cfill(im, x1, y1, x2, y2, fill)

Fills the box from (x1,y1) to (x2,y2) inclusive with fill.

i_line(im, x1, y1, x2, y2, color, endp)

Draw a line to image using Bresenham's line drawing algorithm

   im    - image to draw to
   x1    - starting x coordinate
   y1    - starting x coordinate
   x2    - starting x coordinate
   y2    - starting x coordinate
   color - color to write to image
   endp  - endpoint flag (boolean)
i_line_aa(im, x1, x2, y1, y2, color, endp)

Anti-alias draws a line from (x1,y1) to (x2, y2) in color.

The point (x2, y2) is drawn only if endp is set.

i_flood_fill(im, seedx, seedy, color)

Flood fills the 4-connected region starting from the point (seedx, seedy) with color.

Returns false if (seedx, seedy) are outside the image.

i_flood_cfill(im, seedx, seedy, fill)

Flood fills the 4-connected region starting from the point (seedx, seedy) with fill.

Returns false if (seedx, seedy) are outside the image.

i_flood_fill_border(im, seedx, seedy, color, border)

Flood fills the 4-connected region starting from the point (seedx, seedy) with color, fill stops when the fill reaches a pixels with color border.

Returns false if (seedx, seedy) are outside the image.

i_flood_cfill_border(im, seedx, seedy, fill, border)

Flood fills the 4-connected region starting from the point (seedx, seedy) with fill, the fill stops when it reaches pixels of color border.

Returns false if (seedx, seedy) are outside the image.

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