Drawing primitives

Except for _putpixel(), all these routines are affected by the current drawing mode and the clipping rectangle of the destination bitmap. Unless specified otherwise, all coordinates for drawing operations are inclusive, and they, as well as lengths, are specified in pixel units.

clear_bitmap - Clears the bitmap to color 0.
clear_to_color - Clears the bitmap to the specified color.
putpixel - Writes a pixel into a bitmap.
_putpixel
_putpixel15
_putpixel16
_putpixel24
_putpixel32 - Faster specific version of putpixel().
getpixel - Reads a pixel from a bitmap.
_getpixel
_getpixel15
_getpixel16
_getpixel24
_getpixel32 - Faster specific version of getpixel().
vline - Draws a vertical line onto the bitmap.
hline - Draws a horizontal line onto the bitmap.
do_line - Calculates all the points along a line.
line - Draws a line onto the bitmap.
fastline - Faster version of line().
triangle - Draws a filled triangle.
polygon - Draws a filled polygon.
rect - Draws an outline rectangle.
rectfill - Draws a solid filled rectangle.
do_circle - Calculates all the points in a circle.
circle - Draws a circle.
circlefill - Draws a filled circle.
do_ellipse - Calculates all the points in an ellipse.
ellipse - Draws an ellipse.
ellipsefill - Draws a filled ellipse.
do_arc - Calculates all the points in a circular arc.
arc - Draws a circular arc.
calc_spline - Calculates a series of values along a bezier spline.
spline - Draws a bezier spline using four control points.
floodfill - Floodfills an enclosed area.

Allegro Manual

API

Drawing primitives