pandemonium_engine/modules/paint/paint_canvas.cpp

/*
Copyright (c) 2019 Flairieve
Copyright (c) 2020-2022 cobrapitz
Copyright (c) 2022 Péter Magyar

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

#include "paint_canvas.h"

void PaintCanvas::_enter_tree() {
	/*
	#-------------------------------
	# Set nodes
	#-------------------------------
	canvas = find_node("Canvas")
	grid = find_node("Grid")
	big_grid = find_node("BigGrid")
	canvas_layers = find_node("CanvasLayers")

	#-------------------------------
	# setup layers and canvas
	#-------------------------------
	connect("mouse_entered", self, "_on_mouse_entered")
	connect("mouse_exited", self, "_on_mouse_exited")

	#-------------------------------
	# setup layers and canvas
	#-------------------------------
	#canvas_size = Vector2(int(rect_size.x / grid_size), int(rect_size.y / grid_size))
	#pixel_size = canvas_size

	active_layer = add_new_layer("Layer1")
	preview_layer = add_new_layer("Preview")
	tool_layer = add_new_layer("Tool")

	set_process(true)
	*/
}
void PaintCanvas::_process(float delta) {
	/*
	if not is_visible_in_tree():
		return
	var mouse_position = get_local_mouse_position()
	var rect = Rect2(Vector2(0, 0), rect_size)
	mouse_in_region = rect.has_point(mouse_position)
	*/
}
void PaintCanvas::_draw() {
	/*
	for layer in layers:
		layer.update_texture()

	preview_layer.update_texture()
	tool_layer.update_texture()
	*/
}

void PaintCanvas::resize(int width, int height) {
	/*
	if width < 0:
		width = 1
	if height < 0:
		height = 1

	set_canvas_width(width)
	set_canvas_height(height)

	preview_layer.resize(width, height)
	tool_layer.resize(width, height)
	for layer in layers:
		layer.resize(width, height)
	*/
}
void PaintCanvas::set_pixel_size(int size) {
	/*
	pixel_size = size
	set_grid_size(grid_size)
	set_big_grid_size(big_grid_size)
	set_canvas_width(canvas_width)
	set_canvas_height(canvas_height)
	*/
}
void PaintCanvas::set_grid_size(int size) {
	/*
	grid_size = size
	if not find_node("Grid"):
		return
	find_node("Grid").size = size * pixel_size
	*/
}
void PaintCanvas::set_big_grid_size(int size) {
	/*
	big_grid_size = size
	if not find_node("BigGrid"):
		return
	find_node("BigGrid").size = size * pixel_size
	*/
}
void PaintCanvas::set_canvas_width(int val) {
	/*
	canvas_width = val
	rect_size.x = canvas_width * pixel_size
	*/
}
void PaintCanvas::set_canvas_height(int val) {
	/*
	canvas_height = val
	rect_size.y = canvas_height * pixel_size
	*/
}
void PaintCanvas::toggle_alpha_locked(String layer_name) {
	/*
	var layer = find_layer_by_name(layer_name)
	layer.toggle_alpha_locked()
	*/
}
bool PaintCanvas::is_alpha_locked() {
	/*
	return active_layer.alpha_locked
	*/
}
Rect2 PaintCanvas::get_content_margin() {
	/*
	var rect = Rect2(999999, 999999, -999999, -999999)

	preview_layer.image.get_used_rect()
	for layer in layers:

		var r = layer.image.get_used_rect()

		if r.position.x < rect.position.x:
			rect.position.x = r.position.x
		if r.position.y < rect.position.y:
			rect.position.y = r.position.y
		if r.size.x > rect.size.x:
			rect.size.x = r.size.x
		if r.size.y > rect.size.y:
			rect.size.y = r.size.y

	return rect
	*/
}
void PaintCanvas::crop_to_content() {
	/*
	var rect = get_content_margin()

	#print(rect)

	for layer in layers:
		layer.image

#	set_canvas_width(rect.size.x)
#	set_canvas_height(rect.size.x)

#	preview_layer.resize(width, height)
#	tool_layer.resize(width, height)
#	for layer in layers:
#		layer.resize(width, height)
	*/
}
Node *PaintCanvas::get_active_layer() {
	/*
	return active_layer
	*/
}
Node *PaintCanvas::get_preview_layer() {
	/*
	return preview_layer
	*/
}
void PaintCanvas::clear_active_layer() {
	/*
	active_layer.clear()
	*/
}
void PaintCanvas::clear_preview_layer() {
	/*
	preview_layer.clear()
	*/
}

void PaintCanvas::clear_layer(String layer_name) {
	/*
	for layer in layers:
		if layer.name == layer_name:
			layer.clear()
			break
	*/
}
Node *PaintCanvas::remove_layer(String layer_name) {
	/*
	# change current layer if the active layer is removed
	var del_layer = find_layer_by_name(layer_name)
	del_layer.clear()
	if del_layer == active_layer:
		for layer in layers:
			if layer == preview_layer or layer == active_layer or layer == tool_layer:
				continue
			active_layer = layer
			break
	layers.erase(del_layer)
	return active_layer
	*/
}
Node *PaintCanvas::add_new_layer(String layer_name) {
	/*
	for layer in layers:
		if layer.name == layer_name:
			return
	var layer = GELayer.new()
	layer.name = layer_name

	if layer_name == "Preview":
		layer.create($PreviewLayer, canvas_width, canvas_height)
	elif layer_name == "Tool":
		layer.create($ToolPreviewLayer, canvas_width, canvas_height)
	else:
		var texture_rect = TextureRect.new()
		texture_rect.name = layer_name
		canvas_layers.add_child(texture_rect, true)
		texture_rect.expand = true
		texture_rect.anchor_right = 1
		texture_rect.anchor_bottom = 1
		texture_rect.margin_right = 0
		texture_rect.margin_bottom = 0
		texture_rect.mouse_filter = Control.MOUSE_FILTER_IGNORE
		layer.create(texture_rect, canvas_width, canvas_height)
		layers.append(layer)

	return layer
	*/
}
Node *PaintCanvas::duplicate_layer(String layer_name, String new_layer_name) {
	/*
	for layer in layers:
		if layer.name == new_layer_name:
			return

	var dup_layer :GELayer = find_layer_by_name(layer_name)
	var layer :GELayer = add_new_layer(new_layer_name)
	layer.image.copy_from(dup_layer.image)
	return layer
	*/
}
void PaintCanvas::toggle_layer_visibility(String layer_name) {
	/*
	for layer in layers:
		if layer.name == layer_name:
			layer.visible = not layer.visible
	*/
}
Node *PaintCanvas::find_layer_by_name(String layer_name) {
	/*
	for layer in layers:
		if layer.name == layer_name:
			return layer
	return null
	*/
}
void PaintCanvas::toggle_lock_layer(String layer_name) {
	/*
	find_layer_by_name(layer_name).toggle_lock()
	*/
}
bool PaintCanvas::is_active_layer_locked() {
	/*
	return active_layer.locked
	*/
}
void PaintCanvas::move_layer_forward(String layer_name) {
	/*
	var layer = find_layer_by_name(layer_name).texture_rect_ref
	var new_idx = max(layer.get_index() - 1, 0)
	canvas_layers.move_child(layer, new_idx)
	*/
}
void PaintCanvas::move_layer_back(String layer_name) {
	/*
	var layer = find_layer_by_name(layer_name).texture_rect_ref
	canvas_layers.move_child(layer, layer.get_index() + 1)
	*/
}

void PaintCanvas::select_layer(String layer_name) {
	/*
	active_layer = find_layer_by_name(layer_name)
	*/
}
void PaintCanvas::_on_mouse_entered() {
	/*
	mouse_on_top = true
	*/
}
void PaintCanvas::_on_mouse_exited() {
	/*
	mouse_on_top = false
	*/
}
bool PaintCanvas::is_inside_canvas(int x, int y) {
	/*
	if x < 0 or y < 0:
		return false
	if x >= canvas_width or y >= canvas_height:
		return false
	return true
	*/
}

//Note: Arrays are always passed by reference. To get a copy of an array which
//      can be modified independently of the original array, use duplicate.
// (https://docs.godotengine.org/en/stable/classes/class_array.html)
void PaintCanvas::set_pixel_arr(Array pixels, Color color) {
	/*
	for pixel in pixels:
		_set_pixel(active_layer, pixel.x, pixel.y, color)
	*/
}
void PaintCanvas::set_pixel_v(Vector2 pos, Color color) {
	/*
	set_pixel(pos.x, pos.y, color)
	*/
}
void PaintCanvas::set_pixel(int x, int y, Color color) {
	/*
	_set_pixel(active_layer, x, y, color)
	*/
}
void PaintCanvas::_set_pixel_v(PaintCanvasLayer *layer, Vector2 v, Color color) {
	/*
	_set_pixel(layer, v.x, v.y, color)
	*/
}
void PaintCanvas::_set_pixel(PaintCanvasLayer *layer, int x, int y, Color color) {
	/*
	if not is_inside_canvas(x, y):
		return
	layer.set_pixel(x, y, color)
	*/
}
Color PaintCanvas::get_pixel_v(Vector2 pos) {
	/*
	return get_pixel(pos.x, pos.y)
	*/
}
Color PaintCanvas::get_pixel(int x, int y) {
	/*
	if active_layer:
		return active_layer.get_pixel(x, y)
	return null
	*/
}
void PaintCanvas::set_preview_pixel_v(Vector2 pos, Color color) {
	/*
	set_preview_pixel(pos.x, pos.y, color)
	*/
}

void PaintCanvas::set_preview_pixel(int x, int y, Color color) {
	/*
	if not is_inside_canvas(x, y):
		return
	preview_layer.set_pixel(x, y, color)
	*/
}
Color PaintCanvas::get_preview_pixel_v(Vector2 pos) {
	/*
	return get_preview_pixel(pos.x, pos.y)
	*/
}

Color PaintCanvas::get_preview_pixel(int x, int y) {
	/*
	if not preview_layer:
		return null
	return preview_layer.get_pixel(x, y)
	*/
}
void PaintCanvas::toggle_grid() {
	/*
$Grid.visible = not $Grid.visible
	*/
}
void PaintCanvas::show_grid() {
	/*
$Grid.show()
	*/
}
void PaintCanvas::hide_grid() {
	/*
	$Grid.hide()
	*/
}

Array PaintCanvas::select_color(int x, int y) {
	/*
	print("???")
	var same_color_pixels = []
	var color = get_pixel(x, y)
	for x in range(active_layer.layer_width):
		for y in range(active_layer.layer_height):
			var pixel_color = active_layer.get_pixel(x, y)
			if pixel_color == color:
				same_color_pixels.append(color)
	return same_color_pixels
	*/
}
Array PaintCanvas::select_same_color(int x, int y) {
	/*
	return get_neighbouring_pixels(x, y)
	*/
}

// returns array of Vector2
// yoinked from
// https://www.geeksforgeeks.org/flood-fill-algorithm-implement-fill-paint/
Array PaintCanvas::get_neighbouring_pixels(int pos_x, int pos_y) {
	/*
	var pixels = []

	var to_check_queue = []
	var checked_queue = []

	to_check_queue.append(GEUtils.to_1D(pos_x, pos_y, canvas_width))

	var color = get_pixel(pos_x, pos_y)

	while not to_check_queue.empty():
		var idx = to_check_queue.pop_front()
		var p = GEUtils.to_2D(idx, canvas_width)

		if idx in checked_queue:
			continue

		checked_queue.append(idx)

		if get_pixel(p.x, p.y) != color:
			continue

		# add to result
		pixels.append(p)

		# check neighbours
		var x = p.x - 1
		var y = p.y
		if is_inside_canvas(x, y):
			idx = GEUtils.to_1D(x, y, canvas_width)
			to_check_queue.append(idx)

		x = p.x + 1
		if is_inside_canvas(x, y):
			idx = GEUtils.to_1D(x, y, canvas_width)
			to_check_queue.append(idx)

		x = p.x
		y = p.y - 1
		if is_inside_canvas(x, y):
			idx = GEUtils.to_1D(x, y, canvas_width)
			to_check_queue.append(idx)

		y = p.y + 1
		if is_inside_canvas(x, y):
			idx = GEUtils.to_1D(x, y, canvas_width)
			to_check_queue.append(idx)

	return pixels
	*/
}

PaintCanvas::PaintCanvas() {
	/*

export var pixel_size: int = 16 setget set_pixel_size
export(int, 1, 2500) var canvas_width = 48 setget set_canvas_width # == pixels
export(int, 1, 2500) var canvas_height = 28 setget set_canvas_height # == pixels
export var grid_size = 16 setget set_grid_size
export var big_grid_size = 10 setget set_big_grid_size
export var can_draw = true

var mouse_in_region
var mouse_on_top

var layers : Array = [] # Key: layer_name, val: GELayer
var active_layer: GELayer
var preview_layer: GELayer
var tool_layer: GELayer
var canvas_layers: Control

var canvas
var grid
var big_grid
var selected_pixels = []

var symmetry_x = false
var symmetry_y = false


	*/
}

PaintCanvas::~PaintCanvas() {
}

void PaintCanvas::_bind_methods() {
}