Module drawing

Helpers for drawing basic shapes on images.

Every draw_ function comes in two variants: one creates a new copy of the input image, one modifies the image in place. The latter is more memory efficient, but you lose the original image.

Structs

• Blend
  A canvas that blends pixels when drawing.
• BresenhamLineIter
  Iterates over the coordinates in a line segment using Bresenham’s line drawing algorithm.
• BresenhamLinePixelIter
  Iterates over the image pixels in a line segment using Bresenham’s line drawing algorithm.
• BresenhamLinePixelIterMut
  Iterates over the image pixels in a line segment using Bresenham’s line drawing algorithm.

Traits

• Canvas
  A surface for drawing on - many drawing functions in this library are generic over a Canvas to allow the user to configure e.g. whether to use blending.

Functions

• draw_antialiased_line_segment
  Draws an antialised line segment on a new copy of an image.
• draw_antialiased_line_segment_mut
  Draws an antialised line segment on an image in place.
• draw_cross
  Draws a colored cross on a new copy of an image.
• draw_cross_mut
  Draws a colored cross on an image in place.
• draw_cubic_bezier_curve
  Draws a cubic Bézier curve on a new copy of an image.
• draw_cubic_bezier_curve_mut
  Draws a cubic Bézier curve on an image in place.
• draw_filled_circle
  Draws a circle and its contents on a new copy of the image.
• draw_filled_circle_mut
  Draws a circle and its contents on an image in place.
• draw_filled_ellipse
  Draws an ellipse and its contents on a new copy of the image.
• draw_filled_ellipse_mut
  Draws an ellipse and its contents on an image in place.
• draw_filled_rect
  Draws a rectangle and its contents on a new copy of an image.
• draw_filled_rect_mut
  Draws a rectangle and its contents on an image in place.
• draw_hollow_circle
  Draws the outline of a circle on a new copy of an image.
• draw_hollow_circle_mut
  Draws the outline of a circle on an image in place.
• draw_hollow_ellipse
  Draws the outline of an ellipse on a new copy of an image.
• draw_hollow_ellipse_mut
  Draws the outline of an ellipse on an image in place.
• draw_hollow_rect
  Draws the outline of a rectangle on a new copy of an image.
• draw_hollow_rect_mut
  Draws the outline of a rectangle on an image in place.
• draw_line_segment
  Draws a line segment on a new copy of an image.
• draw_line_segment_mut
  Draws a line segment on an image in place.
• draw_polygon
  Draws a polygon and its contents on a new copy of an image.
• draw_polygon_mut
  Draws a polygon and its contents on an image in place.
• draw_text
  Draws colored text on a new copy of an image.
• draw_text_mut
  Draws colored text on an image in place.
• text_size
  Get the width and height of the given text, rendered with the given font and scale.