From 163e0e3ebd4c7b74307fc1ccebbf7e12266f2cf6 Mon Sep 17 00:00:00 2001
From: Timo Schwarzer <me@timoschwarzer.com>
Date: Thu, 3 Jan 2019 13:08:06 +0100
Subject: [PATCH] Add thumbnails to LargeTexture

---
 editor/plugins/editor_preview_plugins.cpp |  3 +++
 scene/resources/texture.cpp               | 11 +++++++++++
 scene/resources/texture.h                 |  1 +
 3 files changed, 15 insertions(+)

diff --git a/editor/plugins/editor_preview_plugins.cpp b/editor/plugins/editor_preview_plugins.cpp
index ccaddbc0a85..8464dfd0aaf 100644
--- a/editor/plugins/editor_preview_plugins.cpp
+++ b/editor/plugins/editor_preview_plugins.cpp
@@ -86,6 +86,7 @@ Ref<Texture> EditorTexturePreviewPlugin::generate(const RES &p_from, const Size2
 
 	Ref<Image> img;
 	Ref<AtlasTexture> atex = p_from;
+	Ref<LargeTexture> ltex = p_from;
 	if (atex.is_valid()) {
 		Ref<Texture> tex = atex->get_atlas();
 		if (!tex.is_valid()) {
@@ -93,6 +94,8 @@ Ref<Texture> EditorTexturePreviewPlugin::generate(const RES &p_from, const Size2
 		}
 		Ref<Image> atlas = tex->get_data();
 		img = atlas->get_rect(atex->get_region());
+	} else if (ltex.is_valid()) {
+		img = ltex->to_image();
 	} else {
 		Ref<Texture> tex = p_from;
 		img = tex->get_data();
diff --git a/scene/resources/texture.cpp b/scene/resources/texture.cpp
index ad962a3551b..2e0f04ffcb0 100644
--- a/scene/resources/texture.cpp
+++ b/scene/resources/texture.cpp
@@ -1205,6 +1205,17 @@ Ref<Texture> LargeTexture::get_piece_texture(int p_idx) const {
 	ERR_FAIL_INDEX_V(p_idx, pieces.size(), Ref<Texture>());
 	return pieces[p_idx].texture;
 }
+Ref<Image> LargeTexture::to_image() const {
+
+	Ref<Image> img = memnew(Image(this->get_width(), this->get_height(), false, Image::FORMAT_RGBA8));
+	for (int i = 0; i < pieces.size(); i++) {
+
+		Ref<Image> src_img = pieces[i].texture->get_data();
+		img->blit_rect(src_img, Rect2(0, 0, src_img->get_width(), src_img->get_height()), pieces[i].offset);
+	}
+
+	return img;
+}
 
 void LargeTexture::_bind_methods() {
 
diff --git a/scene/resources/texture.h b/scene/resources/texture.h
index cf23aad2392..2b67ebec62f 100644
--- a/scene/resources/texture.h
+++ b/scene/resources/texture.h
@@ -330,6 +330,7 @@ public:
 	int get_piece_count() const;
 	Vector2 get_piece_offset(int p_idx) const;
 	Ref<Texture> get_piece_texture(int p_idx) const;
+	Ref<Image> to_image() const;
 
 	virtual void draw(RID p_canvas_item, const Point2 &p_pos, const Color &p_modulate = Color(1, 1, 1), bool p_transpose = false, const Ref<Texture> &p_normal_map = Ref<Texture>()) const;
 	virtual void draw_rect(RID p_canvas_item, const Rect2 &p_rect, bool p_tile = false, const Color &p_modulate = Color(1, 1, 1), bool p_transpose = false, const Ref<Texture> &p_normal_map = Ref<Texture>()) const;