dt_lua_cairo_t

dt_type

A wrapper around a cairo drawing context. You probably shouldn’t use this after the callback that got it passed returned. For more details of the member functions have a look at the cairo documentation for the drawing context, transformations and paths.

🔗dt_lua_cairo_t.save

self:function(
)

Save the state of the drawing context.

• self - types.dt_lua_cairo_t - The context to modify.

🔗types.dt_lua_cairo_t.restore

self:function(
)

Restore a previously saved state.

• self - types.dt_lua_cairo_t - The context to modify.

🔗dt_lua_cairo_t.move_to

self:function(
  x : float,
  y : float
)

Begin a new sub-path.

• self - types.dt_lua_cairo_t - The context to modify
• x - float - The x coordinate of the new position.
• y - float - The y coordinate of the new position.

🔗dt_lua_cairo_t.line_to

self:function(
  x : float,
  y : float
)

Add a line to the path.

• self - types.dt_lua_cairo_t - The context to modify.
• x - float - The x coordinate of the end of the new line.
• y - float - The y coordinate of the end of the new line.

🔗types.dt_lua_cairo_t.rectangle

self:function(
  x : float,
  y : float,
  width : float,
  height : float
)

Add a closed sub-path rectangle.

• self - types.dt_lua_cairo_t - The context to modify.
• x - float - The x coordinate of the top left corner of the rectangle.
• y - float - The y coordinate of the top left corner of the rectangle.
• width - float - The width of the rectangle.
• height - float - The height of the rectangle.

🔗dt_lua_cairo_t.arc

self:function(
  x : float,
  y : float,
  radius : float,
  angle1 : float,
  angle2 : float
)

Add a circular arc.

• self - types.dt_lua_cairo_t - The context to modify.
• x - float - The x position of the center of the arc.
• y - float - The y position of the center of the arc.
• radius - float - The radius of the arc.
• angle1 - float - The start angle, in radians.
• angle2 - float - The end angle, in radians.

🔗dt_lua_cairo_t.arc_negative

self:function(
  x : float,
  y : float,
  radius : float,
  angle1 : float,
angle2 : float
)

Add a circular arc. It only differs in the direction from types.dt_lua_cairo_t.arc.

• self - types.dt_lua_cairo_t - The context to modify.
• x - float - The x position of the center of the arc.
• y - float - The y position of the center of the arc.
• radius - float - The radius of the arc.
• angle1 - float - The start angle, in radians.
• angle2 - float - The end angle, in radians.

🔗dt_lua_cairo_t.rotate

self:function(
  angle : float
)

Add a rotation to the transformation matrix.

• self - types.dt_lua_cairo_t - The context to modify.
• angle - float - The angle (in radians) by which the user-space axes will be rotated.

🔗dt_lua_cairo_t.scale

self:function(
  x : float,
  y : float
)

Add a scaling to the transformation matrix.

self** - _types.dt_lua_cairo_t_ - The context to modify.

• x - float - The scale factor for the x dimension.
• y - float - The scale factor for the y dimension.

🔗dt_lua_cairo_t.translate

self:function(
  x : float,
  y : float
)

Add a translation to the transformation matrix.

• self - types.dt_lua_cairo_t - The context to modify.
• x - float - Amount to translate in the x direction
• y - float - Amount to translate in the y direction

🔗dt_lua_cairo_t.new_sub_path

self:function(
)

Begin a new sub-path.

• self - types.dt_lua_cairo_t - The context to modify.

🔗dt_lua_cairo_t.draw_line

self:function(
  x_start : float,
  y_start : float,
  x_end : float,
  y_end : float
)

Helper function to draw a line with a given start and end.

• self - types.dt_lua_cairo_t - The context to modify.
• x_start - float - The x coordinate of the start of the new line.
• y_start - float - The y coordinate of the start of the new line.
• x_end - float - The x coordinate of the end of the new line.
• y_end - float - The y coordinate of the end of the new line.