121 lines
4.4 KiB
GDScript
121 lines
4.4 KiB
GDScript
extends Panel
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onready var selected_slot : Control = null
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var images : Array = []
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var current_image = -1
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var dragging = false
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var gradient = null
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var gradient_length : float = 0.0
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func _ready():
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$VBoxContainer/Image.material.set_shader_param("image_size", Vector2(1.0, 1.0))
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select_slot($VBoxContainer/Colors/ColorSlot1)
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change_image(0)
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func on_drop_image_file(file_name : String) -> void:
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var t : ImageTexture = ImageTexture.new()
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t.load(file_name)
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add_reference(t)
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func add_reference(t : Texture) -> void:
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images.insert(current_image+1, { texture=t, scale=1.0, center=Vector2(0.5, 0.5) })
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change_image(1)
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func get_color_under_cursor() -> Color:
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var image : Image = get_viewport().get_texture().get_data()
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var pos = get_global_mouse_position()
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pos.y = image.get_height() - pos.y
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image.lock()
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var c = image.get_pixelv(pos)
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image.unlock()
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return c
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func _on_Image_gui_input(event) -> void:
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if current_image < 0:
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return
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var m : ShaderMaterial = $VBoxContainer/Image.material
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var canvas_size : Vector2 = $VBoxContainer/Image.get_size()
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var image_size : Vector2 = m.get_shader_param("image_size")
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var scale = m.get_shader_param("scale")
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var center : Vector2 = m.get_shader_param("center")
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var new_center : Vector2 = center
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var multiplier : Vector2 = Vector2(canvas_size.x*min(image_size.x/image_size.y, 1.0), canvas_size.y*min(image_size.y/image_size.x, 1.0))
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var image_rect : Rect2 = $VBoxContainer/Image.get_global_rect()
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var offset_from_center : Vector2 = get_global_mouse_position()-(image_rect.position+0.5*image_rect.size)
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if event is InputEventMouseButton:
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if event.pressed:
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var new_scale = scale
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if event.button_index == BUTTON_LEFT and selected_slot != null:
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if selected_slot.get_parent() == $VBoxContainer/Colors:
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selected_slot.set_color(get_color_under_cursor())
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else:
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gradient = selected_slot.gradient
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gradient.clear()
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gradient.add_point(0.0, get_color_under_cursor())
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selected_slot.set_gradient(gradient)
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gradient_length = 0.0
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elif event.button_index == BUTTON_WHEEL_DOWN:
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new_scale = min(new_scale+0.05, 1.0)
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elif event.button_index == BUTTON_WHEEL_UP:
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new_scale = max(new_scale-0.05, 0.05)
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elif event.button_index == BUTTON_MIDDLE:
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dragging = true
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if new_scale != scale:
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m.set_shader_param("scale", new_scale)
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m.set_shader_param("center", center+offset_from_center*(scale-new_scale)/multiplier)
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images[current_image].scale = new_scale
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images[current_image].center = center+offset_from_center*(scale-new_scale)/multiplier
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elif event.button_index == BUTTON_MIDDLE:
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dragging = false
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elif event.button_index == BUTTON_LEFT:
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gradient = null
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elif event is InputEventMouseMotion:
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if dragging:
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new_center = m.get_shader_param("center")-event.relative/multiplier*scale
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elif gradient != null:
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var new_gradient_length = gradient_length + event.relative.length()
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if gradient_length > 0.0:
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for i in range(gradient.get_point_count()):
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gradient.set_point_position(i, gradient.get_point_position(i)*gradient_length/new_gradient_length)
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gradient.add_point(1.0, get_color_under_cursor())
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selected_slot.set_gradient(gradient)
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gradient_length = new_gradient_length
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if new_center != center:
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new_center.x = clamp(new_center.x, 0.0, 1.0)
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new_center.y = clamp(new_center.y, 0.0, 1.0)
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m.set_shader_param("center", new_center)
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images[current_image].center = new_center
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func select_slot(s) -> void:
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if selected_slot != null:
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selected_slot.select(false)
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selected_slot = s
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selected_slot.select(true)
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func _on_Image_resized():
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$VBoxContainer/Image.material.set_shader_param("canvas_size", $VBoxContainer/Image.get_size())
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func change_image(offset = 0):
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current_image += offset
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if current_image < 0:
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current_image = 0
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if current_image >= images.size():
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current_image = images.size()-1
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$VBoxContainer/Image/HBoxContainer/Prev.disabled = current_image <= 0
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$VBoxContainer/Image/HBoxContainer/Next.disabled = current_image >= images.size()-1
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var m : ShaderMaterial = $VBoxContainer/Image.material
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if current_image < 0:
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m.set_shader_param("image", null)
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m.set_shader_param("image_size", Vector2(0, 0))
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m.set_shader_param("scale", 1)
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m.set_shader_param("center", Vector2(0, 0))
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return
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var i = images[current_image]
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var t = i.texture
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m.set_shader_param("image", t)
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m.set_shader_param("image_size", t.get_data().get_size())
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m.set_shader_param("scale", i.scale)
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m.set_shader_param("center", i.center)
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