Added offset support for HUD items

doc/lua_api.txt

@@ -412,6 +412,9 @@ The direction field is the direction in which something is drawn.
 The alignment field specifies how the item will be aligned. It ranges from -1 to 1,
 with 0 being the center, -1 is moved to the left/up, and 1 is to the right/down. Fractional
 values can be used.
+The offset field specifies a pixel offset from the position. Contrary to position,
+the offset is not scaled to screen size. This allows for some precisely-positioned
+items in the HUD.
 Below are the specific uses for fields in each type; fields not listed for that type are ignored.
 
 Note: Future revisions to the HUD API may be incompatible; the HUD API is still in the experimental stages.
@@ -422,6 +425,7 @@ Note: Future revisions to the HUD API may be incompatible; the HUD API is still
              Only the X coordinate scale is used.
     - text: The name of the texture that is displayed.
     - alignment: The alignment of the image.
+    - offset: offset in pixels from position.
 - text
     Displays text on the HUD.
     - scale: Defines the bounding rectangle of the text.
@@ -430,12 +434,14 @@ Note: Future revisions to the HUD API may be incompatible; the HUD API is still
     - number: An integer containing the RGB value of the color used to draw the text.
               Specify 0xFFFFFF for white text, 0xFF0000 for red, and so on.
     - alignment: The alignment of the text.
+    - offset: offset in pixels from position.
 - statbar
     Displays a horizontal bar made up of half-images.
     - text: The name of the texture that is used.
     - number: The number of half-textures that are displayed.
               If odd, will end with a vertically center-split texture.
     - direction
+    - offset: offset in pixels from position.
 - inventory
     - text: The name of the inventory list to be displayed.
     - number: Number of items in the inventory to be displayed.
@@ -1864,4 +1870,6 @@ HUD Definition (hud_add, hud_get)
     ^ Direction: 0: left-right, 1: right-left, 2: top-bottom, 3: bottom-top
     alignment = {x=0, y=0},
     ^ See "HUD Element Types"
+    offset = {x=0, y=0},
+    ^ See "HUD Element Types"
 }

src/client.cpp

@@ -2055,6 +2055,7 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
 		u32 item         = readU32(is);
 		u32 dir          = readU32(is);
 		v2f align        = readV2F1000(is);
+		v2f offset       = readV2F1000(is);
 
 		ClientEvent event;
 		event.type = CE_HUDADD;
@@ -2068,6 +2069,7 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
 		event.hudadd.item   = item;
 		event.hudadd.dir    = dir;
 		event.hudadd.align  = new v2f(align);
+		event.hudadd.offset = new v2f(offset);
 		m_client_event_queue.push_back(event);
 	}
 	else if(command == TOCLIENT_HUDRM)

src/client.h

@@ -231,6 +231,7 @@ struct ClientEvent
 			u32 item;
 			u32 dir;
 			v2f *align;
+			v2f *offset;
 		} hudadd;
 		struct{
 			u32 id;

src/clientserver.h

@@ -453,6 +453,7 @@ enum ToClientCommand
 		u32 item
 		u32 dir
 		v2f1000 align
+		v2f1000 offset
 	*/
 
 	TOCLIENT_HUDRM = 0x50,

src/game.cpp

@@ -2107,6 +2107,7 @@ void the_game(
 						delete event.hudadd.scale;
 						delete event.hudadd.text;
 						delete event.hudadd.align;
+						delete event.hudadd.offset;
 						continue;
 					}
 					
@@ -2120,6 +2121,7 @@ void the_game(
 					e->item   = event.hudadd.item;
 					e->dir    = event.hudadd.dir;
 					e->align  = *event.hudadd.align;
+					e->offset = *event.hudadd.offset;
 					
 					if (id == nhudelem)
 						player->hud.push_back(e);
@@ -2131,6 +2133,7 @@ void the_game(
 					delete event.hudadd.scale;
 					delete event.hudadd.text;
 					delete event.hudadd.align;
+					delete event.hudadd.offset;
 				}
 				else if (event.type == CE_HUDRM)
 				{
@@ -2175,6 +2178,9 @@ void the_game(
 						case HUD_STAT_ALIGN:
 							e->align = *event.hudchange.v2fdata;
 							break;
+						case HUD_STAT_OFFSET:
+							e->offset = *event.hudchange.v2fdata;
+							break;
 					}
 					
 					delete event.hudchange.v2fdata;

src/hud.cpp

@@ -189,6 +189,7 @@ void Hud::drawLuaElements() {
 				v2s32 offset((e->align.X - 1.0) * ((imgsize.Width  * e->scale.X) / 2),
 				             (e->align.Y - 1.0) * ((imgsize.Height * e->scale.X) / 2));
 				rect += offset;
+				rect += v2s32(e->offset.X, e->offset.Y);
 				driver->draw2DImage(texture, rect,
 					core::rect<s32>(core::position2d<s32>(0,0), imgsize),
 					NULL, colors, true);
@@ -202,11 +203,13 @@ void Hud::drawLuaElements() {
 				core::dimension2d<u32> textsize = font->getDimension(text.c_str());
 				v2s32 offset((e->align.X - 1.0) * (textsize.Width / 2),
 				             (e->align.Y - 1.0) * (textsize.Height / 2));
-				font->draw(text.c_str(), size + pos + offset, color);
+				v2s32 offs(e->offset.X, e->offset.Y);
+				font->draw(text.c_str(), size + pos + offset + offs, color);
+				break; }
+			case HUD_ELEM_STATBAR: {
+				v2s32 offs(e->offset.X, e->offset.Y);
+				drawStatbar(pos, HUD_CORNER_UPPER, e->dir, e->text, e->number, offs);
 				break; }
-			case HUD_ELEM_STATBAR:
-				drawStatbar(pos, HUD_CORNER_UPPER, e->dir, e->text, e->number);
-				break;
 			case HUD_ELEM_INVENTORY: {
 				InventoryList *inv = inventory->getList(e->text);
 				drawItem(pos, hotbar_imagesize, e->number, inv, e->item, e->dir);
@@ -219,7 +222,7 @@ void Hud::drawLuaElements() {
 }
 
 
-void Hud::drawStatbar(v2s32 pos, u16 corner, u16 drawdir, std::string texture, s32 count) {
+void Hud::drawStatbar(v2s32 pos, u16 corner, u16 drawdir, std::string texture, s32 count, v2s32 offset) {
 	const video::SColor color(255, 255, 255, 255);
 	const video::SColor colors[] = {color, color, color, color};
 	
@@ -234,6 +237,8 @@ void Hud::drawStatbar(v2s32 pos, u16 corner, u16 drawdir, std::string texture, s
 	if (corner & HUD_CORNER_LOWER)
 		p -= srcd.Height;
 
+	p += offset;
+
 	v2s32 steppos;
 	switch (drawdir) {
 		case HUD_DIR_RIGHT_LEFT:
@@ -285,7 +290,7 @@ void Hud::drawHotbar(v2s32 centerlowerpos, s32 halfheartcount, u16 playeritem) {
 	
 	drawItem(pos, hotbar_imagesize, hotbar_itemcount, mainlist, playeritem + 1, 0);
 	drawStatbar(pos - v2s32(0, 4), HUD_CORNER_LOWER, HUD_DIR_LEFT_RIGHT,
-				"heart.png", halfheartcount);
+				"heart.png", halfheartcount, v2s32(0, 0));
 }
 
 

src/hud.h

@@ -48,7 +48,8 @@ enum HudElementStat {
 	HUD_STAT_NUMBER,
 	HUD_STAT_ITEM,
 	HUD_STAT_DIR,
-	HUD_STAT_ALIGN
+	HUD_STAT_ALIGN,
+	HUD_STAT_OFFSET
 };
 
 struct HudElement {
@@ -61,6 +62,7 @@ struct HudElement {
 	u32 item;
 	u32 dir;
 	v2f align;
+	v2f offset;
 };
 
 
@@ -108,7 +110,7 @@ public:
 	void drawItem(v2s32 upperleftpos, s32 imgsize, s32 itemcount,
 		InventoryList *mainlist, u16 selectitem, u16 direction);
 	void drawLuaElements();
-	void drawStatbar(v2s32 pos, u16 corner, u16 drawdir, std::string texture, s32 count);
+	void drawStatbar(v2s32 pos, u16 corner, u16 drawdir, std::string texture, s32 count, v2s32 offset);
 	
 	void drawHotbar(v2s32 centerlowerpos, s32 halfheartcount, u16 playeritem);
 	void resizeHotbar();

src/scriptapi_object.cpp

@@ -48,6 +48,7 @@ struct EnumString es_HudElementStat[] =
 	{HUD_STAT_ITEM,   "item"},
 	{HUD_STAT_DIR,    "direction"},
 	{HUD_STAT_ALIGN,  "alignment"},
+	{HUD_STAT_OFFSET, "offset"},
 	{0, NULL},
 };
 
@@ -756,6 +757,10 @@ int ObjectRef::l_hud_add(lua_State *L)
 	elem->align = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
 	lua_pop(L, 1);
 
+	lua_getfield(L, 2, "offset");
+	elem->offset = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
+	lua_pop(L, 1);
+
 	u32 id = get_server(L)->hudAdd(player, elem);
 	if (id == (u32)-1) {
 		delete elem;
@@ -841,6 +846,9 @@ int ObjectRef::l_hud_change(lua_State *L)
 		case HUD_STAT_ALIGN:
 			e->align = read_v2f(L, 4);
 			value = &e->align;
+		case HUD_STAT_OFFSET:
+			e->offset = read_v2f(L, 4);
+			value = &e->offset;
 	}
 
 	get_server(L)->hudChange(player, id, stat, value);

src/server.cpp

@@ -3617,6 +3617,7 @@ void Server::SendHUDAdd(u16 peer_id, u32 id, HudElement *form)
 	writeU32(os, form->item);
 	writeU32(os, form->dir);
 	writeV2F1000(os, form->align);
+	writeV2F1000(os, form->offset);
 
 	// Make data buffer
 	std::string s = os.str();
@@ -3652,6 +3653,7 @@ void Server::SendHUDChange(u16 peer_id, u32 id, HudElementStat stat, void *value
 		case HUD_STAT_POS:
 		case HUD_STAT_SCALE:
 		case HUD_STAT_ALIGN:
+		case HUD_STAT_OFFSET:
 			writeV2F1000(os, *(v2f *)value);
 			break;
 		case HUD_STAT_NAME: