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Pixelorama/src/Tools/Pencil.gd

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1.5 KiB
GDScript3
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extends "res://src/Tools/Draw.gd"
var _last_position := Vector2.INF
var _changed := false
class AlphaBlendOp extends Drawer.ColorOp:
var changed := false
func process(src: Color, dst: Color) -> Color:
changed = true
src.a *= strength
return dst.blend(src)
func _init() -> void:
_drawer.color_op = AlphaBlendOp.new()
func draw_start(position : Vector2) -> void:
update_mask()
_changed = false
_drawer.color_op.changed = false
prepare_undo()
_drawer.reset()
_draw_line = Tools.shift
if _draw_line:
_line_start = position
_line_end = position
update_line_polylines(_line_start, _line_end)
else:
draw_tool(position)
_last_position = position
Global.canvas.sprite_changed_this_frame = true
cursor_text = ""
func draw_move(position : Vector2) -> void:
if _draw_line:
var d = _line_angle_constraint(_line_start, position)
_line_end = d.position
cursor_text = d.text
update_line_polylines(_line_start, _line_end)
else:
draw_fill_gap(_last_position, position)
_last_position = position
cursor_text = ""
Global.canvas.sprite_changed_this_frame = true
func draw_end(_position : Vector2) -> void:
if _draw_line:
draw_tool(_line_start)
draw_fill_gap(_line_start, _line_end)
_draw_line = false
if _changed or _drawer.color_op.changed:
commit_undo("Draw")
cursor_text = ""
update_random_image()
func _draw_brush_image(image : Image, src_rect: Rect2, dst: Vector2) -> void:
_changed = true
_get_draw_image().blend_rect(image, src_rect, dst)