From 1a6f6c1cc9cdd8110958aeb423239ac21dabc9d6 Mon Sep 17 00:00:00 2001
From: OverloadedOrama <35376950+OverloadedOrama@users.noreply.github.com>
Date: Sun, 29 Dec 2019 22:04:44 +0200
Subject: [PATCH] Resize image on exporting PNG

Also fixed issue when exporting a spritesheet, spritesheet_rows wasn't being updated if the user didn't change the value of the spinbox
---
 Prefabs/Dialogs/ExportSprites.tscn | 43 +++++++++++++++++++++++++++---
 Scripts/Dialogs/ExportSprites.gd   | 17 +++++++++---
 2 files changed, 53 insertions(+), 7 deletions(-)

diff --git a/Prefabs/Dialogs/ExportSprites.tscn b/Prefabs/Dialogs/ExportSprites.tscn
index 7968be807..e621ad6dd 100644
--- a/Prefabs/Dialogs/ExportSprites.tscn
+++ b/Prefabs/Dialogs/ExportSprites.tscn
@@ -27,6 +27,40 @@ text = "Export current frame"
 items = [ "Export current frame", null, false, 0, null, "Export all frames as multiple files", null, false, 1, null, "Export all frames as a spritesheet (single file)", null, false, 2, null ]
 selected = 0
 
+[node name="Resize" type="HBoxContainer" parent="."]
+margin_right = 40.0
+margin_bottom = 40.0
+
+[node name="Label" type="Label" parent="Resize"]
+margin_top = 13.0
+margin_right = 46.0
+margin_bottom = 27.0
+text = "Resize:"
+
+[node name="ResizeValue" type="SpinBox" parent="Resize"]
+margin_left = 50.0
+margin_right = 124.0
+margin_bottom = 40.0
+min_value = 10.0
+max_value = 1000.0
+step = 10.0
+value = 100.0
+suffix = "%"
+
+[node name="Label2" type="Label" parent="Resize"]
+margin_left = 128.0
+margin_top = 13.0
+margin_right = 215.0
+margin_bottom = 27.0
+text = "Interpolation:"
+
+[node name="Interpolation" type="OptionButton" parent="Resize"]
+margin_right = 41.0
+margin_bottom = 20.0
+text = "Item 0"
+items = [ "Nearest", null, false, 0, null, "Bilinear", null, false, 1, null, "Cubic", null, false, 2, null, "Trilinear", null, false, 3, null, "Lanczos", null, true, 4, null ]
+selected = 0
+
 [node name="Spritesheet" type="HBoxContainer" parent="."]
 visible = false
 margin_left = 8.0
@@ -35,19 +69,20 @@ margin_right = 507.0
 margin_bottom = 312.0
 
 [node name="Label" type="Label" parent="Spritesheet"]
-margin_left = 200.0
 margin_top = 145.0
-margin_right = 300.0
+margin_right = 60.0
 margin_bottom = 159.0
 text = "Columns:"
 
 [node name="VerticalFrames" type="SpinBox" parent="Spritesheet"]
-margin_left = 304.0
-margin_right = 378.0
+margin_left = 64.0
+margin_right = 138.0
 margin_bottom = 304.0
 mouse_default_cursor_shape = 2
 min_value = 1.0
 value = 1.0
 [connection signal="file_selected" from="." to="." method="_on_ExportSprites_file_selected"]
 [connection signal="item_selected" from="ExportOption" to="." method="_on_ExportOption_item_selected"]
+[connection signal="value_changed" from="Resize/ResizeValue" to="." method="_on_ResizeValue_value_changed"]
+[connection signal="item_selected" from="Resize/Interpolation" to="." method="_on_Interpolation_item_selected"]
 [connection signal="value_changed" from="Spritesheet/VerticalFrames" to="." method="_on_VerticalFrames_value_changed"]
diff --git a/Scripts/Dialogs/ExportSprites.gd b/Scripts/Dialogs/ExportSprites.gd
index 819efc906..136bceca8 100644
--- a/Scripts/Dialogs/ExportSprites.gd
+++ b/Scripts/Dialogs/ExportSprites.gd
@@ -2,6 +2,8 @@ extends FileDialog
 
 var current_export_path := ""
 var export_option := 0
+var resize := 100
+var interpolation = Image.INTERPOLATE_NEAREST
 var spritesheet_rows = 1
 var spritesheet_columns = 1
 
@@ -23,9 +25,14 @@ func _on_ExportOption_item_selected(ID : int) -> void:
 	else:
 		spritesheet_container.visible = false
 
+func _on_ResizeValue_value_changed(value) -> void:
+	resize = value
+
+func _on_Interpolation_item_selected(ID : int) -> void:
+	interpolation = ID
+
 func _on_VerticalFrames_value_changed(value) -> void:
 	value = min(value, Global.canvases.size())
-	spritesheet_rows = ceil(Global.canvases.size() / value)
 	spritesheet_columns = value
 
 	var vertical_frames : SpinBox = Global.find_node_by_name(self, "VerticalFrames")
@@ -68,11 +75,15 @@ func save_sprite(canvas : Canvas, path : String) -> void:
 
 		canvas.blend_rect(whole_image, img, Rect2(canvas.position, canvas.size), Vector2.ZERO)
 		layer[0].lock()
+
+	if resize != 100:
+		whole_image.resize(whole_image.get_size().x * resize / 100, whole_image.get_size().y * resize / 100, interpolation)
 	var err = whole_image.save_png(path)
 	if err != OK:
 		OS.alert("Can't save file")
 
 func save_spritesheet() -> void:
+	spritesheet_rows = ceil(Global.canvases.size() / spritesheet_columns)
 	var width = Global.canvas.size.x * spritesheet_rows
 	var height = Global.canvas.size.y * spritesheet_columns
 
@@ -105,8 +116,8 @@ func save_spritesheet() -> void:
 			canvas.blend_rect(whole_image, img, Rect2(canvas.position, canvas.size), dst)
 			layer[0].lock()
 
-
+	if resize != 100:
+		whole_image.resize(width * resize / 100, height * resize / 100, interpolation)
 	var err = whole_image.save_png(current_export_path)
 	if err != OK:
 		OS.alert("Can't save file")
-