-Make a rare corner case where disabling/reenabling mipmaps causes invalid texture state. Fixes #3102

drivers/gles2/rasterizer_gles2.cpp

@@ -929,6 +929,7 @@ void RasterizerGLES2::texture_allocate(RID p_texture,int p_width, int p_height,I
 	texture->compressed=compressed;
 	texture->has_alpha=false; //by default it doesn't have alpha unless something with alpha is blitteds
 	texture->data_size=0;
+	texture->mipmaps=0;
 
 
 	glActiveTexture(GL_TEXTURE0);
@@ -1086,6 +1087,7 @@ void RasterizerGLES2::texture_set_data(RID p_texture,const Image& p_image,VS::Cu
 		glGenerateMipmap(texture->target);
 	}
 
+	texture->mipmaps=mipmaps;
 
 
 
@@ -1269,11 +1271,14 @@ void RasterizerGLES2::texture_set_flags(RID p_texture,uint32_t p_flags) {
 		p_flags&=VS::TEXTURE_FLAG_FILTER;//can change only filter
 	}
 
+	bool had_mipmaps = texture->flags&VS::TEXTURE_FLAG_MIPMAPS;
+
 	glActiveTexture(GL_TEXTURE0);
 	glBindTexture(texture->target, texture->tex_id);
 	uint32_t cube = texture->flags & VS::TEXTURE_FLAG_CUBEMAP;
 	texture->flags=p_flags|cube; // can't remove a cube from being a cube
 
+
 	bool force_clamp_to_edge = !(p_flags&VS::TEXTURE_FLAG_MIPMAPS && !texture->ignore_mipmaps) && (nearest_power_of_2(texture->alloc_height)!=texture->alloc_height || nearest_power_of_2(texture->alloc_width)!=texture->alloc_width);
 
 	if (!force_clamp_to_edge && (texture->flags&VS::TEXTURE_FLAG_REPEAT || texture->flags&VS::TEXTURE_FLAG_MIRRORED_REPEAT) && texture->target != GL_TEXTURE_CUBE_MAP) {
@@ -1304,9 +1309,13 @@ void RasterizerGLES2::texture_set_flags(RID p_texture,uint32_t p_flags) {
 		}
 	}
 
-	if (texture->flags&VS::TEXTURE_FLAG_MIPMAPS && !texture->ignore_mipmaps)
+	if (texture->flags&VS::TEXTURE_FLAG_MIPMAPS && !texture->ignore_mipmaps) {
+		if (!had_mipmaps && texture->mipmaps==1) {
+			glGenerateMipmap(texture->target);
+		}
 		glTexParameteri(texture->target,GL_TEXTURE_MIN_FILTER,use_fast_texture_filter?GL_LINEAR_MIPMAP_NEAREST:GL_LINEAR_MIPMAP_LINEAR);
-	else{
+
+	} else{
 		if (texture->flags&VS::TEXTURE_FLAG_FILTER) {
 			glTexParameteri(texture->target,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
 		} else {

drivers/gles2/rasterizer_gles2.h

@@ -138,6 +138,8 @@ class RasterizerGLES2 : public Rasterizer {
 		StringName reloader_func;
 		Image image[6];
 
+		int mipmaps;
+
 		bool active;
 		GLuint tex_id;
 
@@ -159,6 +161,7 @@ class RasterizerGLES2 : public Rasterizer {
 			compressed=false;
 			total_data_size=0;
 			target=GL_TEXTURE_2D;
+			mipmaps=0;
 
 			reloader=0;
 		}

scene/gui/tabs.cpp

@@ -266,6 +266,7 @@ void Tabs::_notification(int p_what) {
 			int label_valign_fg = get_constant("label_valign_fg");
 			int label_valign_bg = get_constant("label_valign_bg");
 
+
 			int w=0;
 
 			int mw = 0;
@@ -277,12 +278,16 @@ void Tabs::_notification(int p_what) {
 
 				for(int i=0;i<tabs.size();i++) {
 
+
 					Ref<Texture> tex = tabs[i].icon;
 					if (tex.is_valid()) {
 						if (tabs[i].text!="")
 							mw+=get_constant("hseparation");
 
 					}
+
+					tabs[i].ofs_cache=mw;
+
 					mw+=font->get_string_size(tabs[i].text).width;
 					if (current==i)
 						mw+=tab_fg->get_minimum_size().width;
@@ -303,6 +308,9 @@ void Tabs::_notification(int p_what) {
 						bms.width+=get_constant("hseparation");
 						mw+=bms.width;
 					}
+
+
+
 				}
 
 			}
@@ -758,6 +766,79 @@ Tabs::TabAlign Tabs::get_tab_align() const {
 }
 
 
+void Tabs::ensure_tab_visible(int p_idx) {
+
+	if (!is_inside_tree())
+		return;
+
+	ERR_FAIL_INDEX(p_idx,tabs.size());
+
+	if (p_idx<offset) {
+		offset=p_idx;
+		update();
+		return;
+	}
+
+	Ref<StyleBox> tab_bg = get_stylebox("tab_bg");
+	Ref<StyleBox> tab_fg = get_stylebox("tab_fg");
+	Ref<Font> font = get_font("font");
+
+	Ref<Texture> incr = get_icon("increment");
+	Ref<Texture> decr = get_icon("decrement");
+
+	int limit=get_size().width-incr->get_width()-decr->get_width();
+
+
+
+	int x=0;
+	for(int i=0;i<tabs.size();i++) {
+
+		if (i<offset)
+			continue;
+
+		Ref<Texture> tex = tabs[i].icon;
+		if (tex.is_valid()) {
+			if (tabs[i].text!="")
+				x+=get_constant("hseparation");
+
+		}
+
+		tabs[i].x_cache=x;
+
+		x+=font->get_string_size(tabs[i].text).width;
+		if (current==i)
+			x+=tab_fg->get_minimum_size().width;
+		else
+			x+=tab_bg->get_minimum_size().width;
+
+		if (tabs[i].right_button.is_valid()) {
+			Ref<Texture> rb=tabs[i].right_button;
+			Size2 bms = rb->get_size();//+get_stylebox("button")->get_minimum_size();
+			bms.width+=get_constant("hseparation");
+
+			x+=bms.width;
+		}
+
+		if (tabs[i].close_button.is_valid()) {
+			Ref<Texture> cb=tabs[i].close_button;
+			Size2 bms = cb->get_size();//+get_stylebox("button")->get_minimum_size();
+			bms.width+=get_constant("hseparation");
+			x+=bms.width;
+		}
+
+		tabs[i].x_size_cache=x-tabs[i].x_cache;
+
+
+
+	}
+
+	while(offset<tabs.size() && ( (tabs[p_idx].x_cache + tabs[p_idx].x_size_cache) - tabs[offset].x_cache) < limit) {
+		offset++;
+	}
+
+	update();
+}
+
 void Tabs::_bind_methods() {
 
 	ObjectTypeDB::bind_method(_MD("_input_event"),&Tabs::_input_event);
@@ -772,6 +853,7 @@ void Tabs::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("add_tab","title","icon:Texture"),&Tabs::add_tab);
 	ObjectTypeDB::bind_method(_MD("set_tab_align","align"),&Tabs::set_tab_align);
 	ObjectTypeDB::bind_method(_MD("get_tab_align"),&Tabs::get_tab_align);
+	ObjectTypeDB::bind_method(_MD("ensure_tab_visible","idx"),&Tabs::ensure_tab_visible);
 
 	ADD_SIGNAL(MethodInfo("tab_changed",PropertyInfo(Variant::INT,"tab")));
 	ADD_SIGNAL(MethodInfo("right_button_pressed",PropertyInfo(Variant::INT,"tab")));
@@ -804,4 +886,6 @@ Tabs::Tabs() {
 	cb_displaypolicy = SHOW_NEVER; // Default : no close button
 	offset=0;
 	max_drawn_tab=0;
+
+
 }

scene/gui/tabs.h

@@ -59,10 +59,14 @@ private:
 		Ref<Texture> icon;
 		int ofs_cache;
 		int size_cache;
+		int x_cache;
+		int x_size_cache;
+
 		Ref<Texture> right_button;
 		Rect2 rb_rect;
 		Ref<Texture> close_button;
 		Rect2 cb_rect;
+
 	};
 
 
@@ -119,6 +123,8 @@ public:
 
 	void clear_tabs();
 
+	void ensure_tab_visible(int p_idx);
+
 	Size2 get_minimum_size() const;
 
 	Tabs();

tools/editor/editor_node.cpp

@@ -4723,11 +4723,13 @@ void EditorNode::_scene_tab_changed(int p_tab) {
 	editor_data.get_undo_redo().add_do_method(this,"set_current_version",unsaved?saved_version:0);
 	editor_data.get_undo_redo().add_do_method(this,"set_current_scene",p_tab);
 	editor_data.get_undo_redo().add_do_method(scene_tabs,"set_current_tab",p_tab);
+	editor_data.get_undo_redo().add_do_method(scene_tabs,"ensure_tab_visible",p_tab);
 	editor_data.get_undo_redo().add_do_method(this,"set_current_version",next_scene_version==0?editor_data.get_undo_redo().get_version()+1:next_scene_version);
 
 	editor_data.get_undo_redo().add_undo_method(this,"set_current_version",next_scene_version);
 	editor_data.get_undo_redo().add_undo_method(this,"set_current_scene",editor_data.get_edited_scene());
 	editor_data.get_undo_redo().add_undo_method(scene_tabs,"set_current_tab",editor_data.get_edited_scene());
+	editor_data.get_undo_redo().add_undo_method(scene_tabs,"ensure_tab_visible",p_tab,editor_data.get_edited_scene());
 	editor_data.get_undo_redo().add_undo_method(this,"set_current_version",saved_version);
 	editor_data.get_undo_redo().commit_action();