Remove obsolete LargeTexture, it's no longer useful since 3.x

It existed in early Godot releases to allow working around hardware limitations
on max texture sizes (e.g. hardware limits of 1024x1024 pixels).

Nowadays the max texture size supported natively by Godot is 16384x16384, and
even low end mobile hardware should support at least 4096x4096.

The LargeTexture implementation is basically just an array with offsets, sizes
and textures and should be easy to replicate with a custom Texture resource if
needed - solving most of its bugs on the way as the implementation removed here
has various unimplemented or incomplete methods.

9 files changed, 3 insertions, 323 deletions

diff --git a/doc/classes/LargeTexture.xml b/doc/classes/LargeTexture.xml
deleted file mode 100644
index a1d172e4b1..0000000000
--- a/doc/classes/LargeTexture.xml
+++ /dev/null
@@ -1,90 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<class name="LargeTexture" inherits="Texture2D" version="4.0">
-	<brief_description>
-		A [Texture2D] capable of storing many smaller textures with offsets.
-	</brief_description>
-	<description>
-		A [Texture2D] capable of storing many smaller textures with offsets.
-		You can dynamically add pieces ([Texture2D]s) to this [LargeTexture] using different offsets.
-	</description>
-	<tutorials>
-	</tutorials>
-	<methods>
-		<method name="add_piece">
-			<return type="int">
-			</return>
-			<argument index="0" name="ofs" type="Vector2">
-			</argument>
-			<argument index="1" name="texture" type="Texture2D">
-			</argument>
-			<description>
-				Adds [code]texture[/code] to this [LargeTexture], starting on offset [code]ofs[/code].
-			</description>
-		</method>
-		<method name="clear">
-			<return type="void">
-			</return>
-			<description>
-				Clears the [LargeTexture].
-			</description>
-		</method>
-		<method name="get_piece_count" qualifiers="const">
-			<return type="int">
-			</return>
-			<description>
-				Returns the number of pieces currently in this [LargeTexture].
-			</description>
-		</method>
-		<method name="get_piece_offset" qualifiers="const">
-			<return type="Vector2">
-			</return>
-			<argument index="0" name="idx" type="int">
-			</argument>
-			<description>
-				Returns the offset of the piece with the index [code]idx[/code].
-			</description>
-		</method>
-		<method name="get_piece_texture" qualifiers="const">
-			<return type="Texture2D">
-			</return>
-			<argument index="0" name="idx" type="int">
-			</argument>
-			<description>
-				Returns the [Texture2D] of the piece with the index [code]idx[/code].
-			</description>
-		</method>
-		<method name="set_piece_offset">
-			<return type="void">
-			</return>
-			<argument index="0" name="idx" type="int">
-			</argument>
-			<argument index="1" name="ofs" type="Vector2">
-			</argument>
-			<description>
-				Sets the offset of the piece with the index [code]idx[/code] to [code]ofs[/code].
-			</description>
-		</method>
-		<method name="set_piece_texture">
-			<return type="void">
-			</return>
-			<argument index="0" name="idx" type="int">
-			</argument>
-			<argument index="1" name="texture" type="Texture2D">
-			</argument>
-			<description>
-				Sets the [Texture2D] of the piece with index [code]idx[/code] to [code]texture[/code].
-			</description>
-		</method>
-		<method name="set_size">
-			<return type="void">
-			</return>
-			<argument index="0" name="size" type="Vector2">
-			</argument>
-			<description>
-				Sets the size of this [LargeTexture].
-			</description>
-		</method>
-	</methods>
-	<constants>
-	</constants>
-</class>
diff --git a/editor/icons/LargeTexture.svg b/editor/icons/LargeTexture.svg
deleted file mode 100644
index 137a761e1d..0000000000
--- a/editor/icons/LargeTexture.svg
+++ /dev/null
@@ -1 +0,0 @@
-<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg"><path d="m1 1v1 2h1v-2h2v-1zm11 0v1h2v2h1v-3zm-3 5v1h-1v1h-2v1h-1v1h-1v1h2 2 2 2v-2h-1v-1-1h-1v-1zm-8 6v2 1h3v-1h-2v-2zm13 0v2h-2v1h3v-1-2z" fill="#e0e0e0" fill-opacity=".99608"/></svg>
diff --git a/editor/plugins/canvas_item_editor_plugin.cpp b/editor/plugins/canvas_item_editor_plugin.cpp
index fc3e15aa52..6ac47595dc 100644
--- a/editor/plugins/canvas_item_editor_plugin.cpp
+++ b/editor/plugins/canvas_item_editor_plugin.cpp
@@ -6518,8 +6518,7 @@ bool CanvasItemEditorViewport::can_drop_data(const Point2 &p_point, const Varian
 						   type == "CurveTexture" ||
 						   type == "GradientTexture" ||
 						   type == "StreamTexture2D" ||
-						   type == "AtlasTexture" ||
-						   type == "LargeTexture") {
+						   type == "AtlasTexture") {
 					Ref<Texture2D> texture = Ref<Texture2D>(Object::cast_to<Texture2D>(*res));
 					if (!texture.is_valid()) {
 						continue;
diff --git a/editor/plugins/editor_preview_plugins.cpp b/editor/plugins/editor_preview_plugins.cpp
index d3e5854786..87eeb82101 100644
--- a/editor/plugins/editor_preview_plugins.cpp
+++ b/editor/plugins/editor_preview_plugins.cpp
@@ -81,7 +81,6 @@ bool EditorTexturePreviewPlugin::generate_small_preview_automatically() const {
 Ref<Texture2D> EditorTexturePreviewPlugin::generate(const RES &p_from, const Size2 &p_size) const {
 	Ref<Image> img;
 	Ref<AtlasTexture> atex = p_from;
-	Ref<LargeTexture> ltex = p_from;
 	if (atex.is_valid()) {
 		Ref<Texture2D> tex = atex->get_atlas();
 		if (!tex.is_valid()) {
@@ -94,8 +93,6 @@ Ref<Texture2D> EditorTexturePreviewPlugin::generate(const RES &p_from, const Siz
 		}
 
 		img = atlas->get_rect(atex->get_region());
-	} else if (ltex.is_valid()) {
-		img = ltex->to_image();
 	} else {
 		Ref<Texture2D> tex = p_from;
 		if (tex.is_valid()) {
diff --git a/editor/plugins/texture_editor_plugin.cpp b/editor/plugins/texture_editor_plugin.cpp
index 253f8878d2..ecf7370834 100644
--- a/editor/plugins/texture_editor_plugin.cpp
+++ b/editor/plugins/texture_editor_plugin.cpp
@@ -143,7 +143,7 @@ TextureEditor::~TextureEditor() {
 
 //
 bool EditorInspectorPluginTexture::can_handle(Object *p_object) {
-	return Object::cast_to<ImageTexture>(p_object) != nullptr || Object::cast_to<AtlasTexture>(p_object) != nullptr || Object::cast_to<StreamTexture2D>(p_object) != nullptr || Object::cast_to<LargeTexture>(p_object) != nullptr || Object::cast_to<AnimatedTexture>(p_object) != nullptr;
+	return Object::cast_to<ImageTexture>(p_object) != nullptr || Object::cast_to<AtlasTexture>(p_object) != nullptr || Object::cast_to<StreamTexture2D>(p_object) != nullptr || Object::cast_to<AnimatedTexture>(p_object) != nullptr;
 }
 
 void EditorInspectorPluginTexture::parse_begin(Object *p_object) {
diff --git a/editor/plugins/tile_set_editor_plugin.cpp b/editor/plugins/tile_set_editor_plugin.cpp
index feaf609557..f683c4b10d 100644
--- a/editor/plugins/tile_set_editor_plugin.cpp
+++ b/editor/plugins/tile_set_editor_plugin.cpp
@@ -319,7 +319,7 @@ void TileSetEditor::_notification(int p_what) {
 			tool_editmode[EDITMODE_NAVIGATION]->set_icon(get_theme_icon("Navigation2D", "EditorIcons"));
 			tool_editmode[EDITMODE_BITMASK]->set_icon(get_theme_icon("PackedDataContainer", "EditorIcons"));
 			tool_editmode[EDITMODE_PRIORITY]->set_icon(get_theme_icon("MaterialPreviewLight1", "EditorIcons"));
-			tool_editmode[EDITMODE_ICON]->set_icon(get_theme_icon("LargeTexture", "EditorIcons"));
+			tool_editmode[EDITMODE_ICON]->set_icon(get_theme_icon("Image", "EditorIcons"));
 			tool_editmode[EDITMODE_Z_INDEX]->set_icon(get_theme_icon("Sort", "EditorIcons"));
 
 			scroll->add_theme_style_override("bg", get_theme_stylebox("bg", "Tree"));
diff --git a/scene/register_scene_types.cpp b/scene/register_scene_types.cpp
index 1b3be13039..580448f6bf 100644
--- a/scene/register_scene_types.cpp
+++ b/scene/register_scene_types.cpp
@@ -729,7 +729,6 @@ void register_scene_types() {
 	ClassDB::register_class<ImageTexture>();
 	ClassDB::register_class<AtlasTexture>();
 	ClassDB::register_class<MeshTexture>();
-	ClassDB::register_class<LargeTexture>();
 	ClassDB::register_class<CurveTexture>();
 	ClassDB::register_class<GradientTexture>();
 	ClassDB::register_class<ProxyTexture>();
diff --git a/scene/resources/texture.cpp b/scene/resources/texture.cpp
index 771365152d..624eae0411 100644
--- a/scene/resources/texture.cpp
+++ b/scene/resources/texture.cpp
@@ -1405,185 +1405,6 @@ MeshTexture::MeshTexture() {
 
 //////////////////////////////////////////
 
-int LargeTexture::get_width() const {
-	return size.width;
-}
-
-int LargeTexture::get_height() const {
-	return size.height;
-}
-
-RID LargeTexture::get_rid() const {
-	return RID();
-}
-
-bool LargeTexture::has_alpha() const {
-	for (int i = 0; i < pieces.size(); i++) {
-		if (pieces[i].texture->has_alpha()) {
-			return true;
-		}
-	}
-
-	return false;
-}
-
-int LargeTexture::add_piece(const Point2 &p_offset, const Ref<Texture2D> &p_texture) {
-	ERR_FAIL_COND_V(p_texture.is_null(), -1);
-	Piece p;
-	p.offset = p_offset;
-	p.texture = p_texture;
-	pieces.push_back(p);
-
-	return pieces.size() - 1;
-}
-
-void LargeTexture::set_piece_offset(int p_idx, const Point2 &p_offset) {
-	ERR_FAIL_INDEX(p_idx, pieces.size());
-	pieces.write[p_idx].offset = p_offset;
-};
-
-void LargeTexture::set_piece_texture(int p_idx, const Ref<Texture2D> &p_texture) {
-	ERR_FAIL_COND(p_texture == this);
-	ERR_FAIL_COND(p_texture.is_null());
-	ERR_FAIL_INDEX(p_idx, pieces.size());
-	pieces.write[p_idx].texture = p_texture;
-};
-
-void LargeTexture::set_size(const Size2 &p_size) {
-	size = p_size;
-}
-
-void LargeTexture::clear() {
-	pieces.clear();
-	size = Size2i();
-}
-
-Array LargeTexture::_get_data() const {
-	Array arr;
-	for (int i = 0; i < pieces.size(); i++) {
-		arr.push_back(pieces[i].offset);
-		arr.push_back(pieces[i].texture);
-	}
-	arr.push_back(Size2(size));
-	return arr;
-}
-
-void LargeTexture::_set_data(const Array &p_array) {
-	ERR_FAIL_COND(p_array.size() < 1);
-	ERR_FAIL_COND(!(p_array.size() & 1));
-	clear();
-	for (int i = 0; i < p_array.size() - 1; i += 2) {
-		add_piece(p_array[i], p_array[i + 1]);
-	}
-	size = Size2(p_array[p_array.size() - 1]);
-}
-
-int LargeTexture::get_piece_count() const {
-	return pieces.size();
-}
-
-Vector2 LargeTexture::get_piece_offset(int p_idx) const {
-	ERR_FAIL_INDEX_V(p_idx, pieces.size(), Vector2());
-	return pieces[p_idx].offset;
-}
-
-Ref<Texture2D> LargeTexture::get_piece_texture(int p_idx) const {
-	ERR_FAIL_INDEX_V(p_idx, pieces.size(), Ref<Texture2D>());
-	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_image();
-		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() {
-	ClassDB::bind_method(D_METHOD("add_piece", "ofs", "texture"), &LargeTexture::add_piece);
-	ClassDB::bind_method(D_METHOD("set_piece_offset", "idx", "ofs"), &LargeTexture::set_piece_offset);
-	ClassDB::bind_method(D_METHOD("set_piece_texture", "idx", "texture"), &LargeTexture::set_piece_texture);
-	ClassDB::bind_method(D_METHOD("set_size", "size"), &LargeTexture::set_size);
-	ClassDB::bind_method(D_METHOD("clear"), &LargeTexture::clear);
-
-	ClassDB::bind_method(D_METHOD("get_piece_count"), &LargeTexture::get_piece_count);
-	ClassDB::bind_method(D_METHOD("get_piece_offset", "idx"), &LargeTexture::get_piece_offset);
-	ClassDB::bind_method(D_METHOD("get_piece_texture", "idx"), &LargeTexture::get_piece_texture);
-
-	ClassDB::bind_method(D_METHOD("_set_data", "data"), &LargeTexture::_set_data);
-	ClassDB::bind_method(D_METHOD("_get_data"), &LargeTexture::_get_data);
-
-	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "_data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "_set_data", "_get_data");
-}
-
-void LargeTexture::draw(RID p_canvas_item, const Point2 &p_pos, const Color &p_modulate, bool p_transpose) const {
-	for (int i = 0; i < pieces.size(); i++) {
-		// TODO
-		pieces[i].texture->draw(p_canvas_item, pieces[i].offset + p_pos, p_modulate, p_transpose);
-	}
-}
-
-void LargeTexture::draw_rect(RID p_canvas_item, const Rect2 &p_rect, bool p_tile, const Color &p_modulate, bool p_transpose) const {
-	//tiling not supported for this
-	if (size.x == 0 || size.y == 0) {
-		return;
-	}
-
-	Size2 scale = p_rect.size / size;
-
-	for (int i = 0; i < pieces.size(); i++) {
-		// TODO
-		pieces[i].texture->draw_rect(p_canvas_item, Rect2(pieces[i].offset * scale + p_rect.position, pieces[i].texture->get_size() * scale), false, p_modulate, p_transpose);
-	}
-}
-
-void LargeTexture::draw_rect_region(RID p_canvas_item, const Rect2 &p_rect, const Rect2 &p_src_rect, const Color &p_modulate, bool p_transpose, bool p_clip_uv) const {
-	//tiling not supported for this
-	if (p_src_rect.size.x == 0 || p_src_rect.size.y == 0) {
-		return;
-	}
-
-	Size2 scale = p_rect.size / p_src_rect.size;
-
-	for (int i = 0; i < pieces.size(); i++) {
-		// TODO
-		Rect2 rect(pieces[i].offset, pieces[i].texture->get_size());
-		if (!p_src_rect.intersects(rect)) {
-			continue;
-		}
-		Rect2 local = p_src_rect.intersection(rect);
-		Rect2 target = local;
-		target.size *= scale;
-		target.position = p_rect.position + (p_src_rect.position + rect.position) * scale;
-		local.position -= rect.position;
-		pieces[i].texture->draw_rect_region(p_canvas_item, target, local, p_modulate, p_transpose, false);
-	}
-}
-
-bool LargeTexture::is_pixel_opaque(int p_x, int p_y) const {
-	for (int i = 0; i < pieces.size(); i++) {
-		// TODO
-		if (!pieces[i].texture.is_valid()) {
-			continue;
-		}
-
-		Rect2 rect(pieces[i].offset, pieces[i].texture->get_size());
-		if (rect.has_point(Point2(p_x, p_y))) {
-			return pieces[i].texture->is_pixel_opaque(p_x - rect.position.x, p_y - rect.position.y);
-		}
-	}
-
-	return true;
-}
-
-LargeTexture::LargeTexture() {
-}
-
-///////////////////
-
 void CurveTexture::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_width", "width"), &CurveTexture::set_width);
 
diff --git a/scene/resources/texture.h b/scene/resources/texture.h
index 16c98f2891..264d85d187 100644
--- a/scene/resources/texture.h
+++ b/scene/resources/texture.h
@@ -297,51 +297,6 @@ public:
 	MeshTexture();
 };
 
-class LargeTexture : public Texture2D {
-	GDCLASS(LargeTexture, Texture2D);
-	RES_BASE_EXTENSION("largetex");
-
-protected:
-	struct Piece {
-		Point2 offset;
-		Ref<Texture2D> texture;
-	};
-
-	Vector<Piece> pieces;
-	Size2i size;
-
-	Array _get_data() const;
-	void _set_data(const Array &p_array);
-	static void _bind_methods();
-
-public:
-	virtual int get_width() const override;
-	virtual int get_height() const override;
-	virtual RID get_rid() const override;
-
-	virtual bool has_alpha() const override;
-
-	int add_piece(const Point2 &p_offset, const Ref<Texture2D> &p_texture);
-	void set_piece_offset(int p_idx, const Point2 &p_offset);
-	void set_piece_texture(int p_idx, const Ref<Texture2D> &p_texture);
-
-	void set_size(const Size2 &p_size);
-	void clear();
-
-	int get_piece_count() const;
-	Vector2 get_piece_offset(int p_idx) const;
-	Ref<Texture2D> 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 override;
-	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 override;
-	virtual void draw_rect_region(RID p_canvas_item, const Rect2 &p_rect, const Rect2 &p_src_rect, const Color &p_modulate = Color(1, 1, 1), bool p_transpose = false, bool p_clip_uv = true) const override;
-
-	bool is_pixel_opaque(int p_x, int p_y) const override;
-
-	LargeTexture();
-};
-
 class TextureLayered : public Texture {
 	GDCLASS(TextureLayered, Texture);