small drawItemStack cleanup

-> Replace the three bool params with an enum
-> Add struct for the static content, leads to less repetition
-> cache enable_animations setting

src/guiFormSpecMenu.cpp

@@ -2196,6 +2196,8 @@ void GUIFormSpecMenu::drawList(const ListDrawSpec &s, int phase,
 			&& m_selected_item->listname == s.listname
 			&& m_selected_item->i == item_i;
 		bool hovering = rect.isPointInside(m_pointer);
+		ItemRotationKind rotation_kind = selected ? IT_ROT_SELECTED :
+			(hovering ? IT_ROT_HOVERED : IT_ROT_NONE);
 
 		if (phase == 0) {
 			if (hovering) {
@@ -2238,7 +2240,7 @@ void GUIFormSpecMenu::drawList(const ListDrawSpec &s, int phase,
 			{
 				drawItemStack(driver, m_font, item,
 					rect, &AbsoluteClippingRect, m_gamedef,
-					selected, hovering, false);
+					rotation_kind);
 			}
 
 			// Draw tooltip
@@ -2284,7 +2286,7 @@ void GUIFormSpecMenu::drawSelectedItem()
 	if (!m_selected_item) {
 		drawItemStack(driver, m_font, ItemStack(),
 			core::rect<s32>(v2s32(0, 0), v2s32(0, 0)),
-			NULL, m_gamedef, false, false, true);
+			NULL, m_gamedef, IT_ROT_DRAGGED);
 		return;
 	}
 
@@ -2297,7 +2299,7 @@ void GUIFormSpecMenu::drawSelectedItem()
 
 	core::rect<s32> imgrect(0,0,imgsize.X,imgsize.Y);
 	core::rect<s32> rect = imgrect + (m_pointer - imgrect.getCenter());
-	drawItemStack(driver, m_font, stack, rect, NULL, m_gamedef, false, false, true);
+	drawItemStack(driver, m_font, stack, rect, NULL, m_gamedef, IT_ROT_DRAGGED);
 }
 
 void GUIFormSpecMenu::drawMenu()
@@ -2434,7 +2436,7 @@ void GUIFormSpecMenu::drawMenu()
 		// Viewport rectangle on screen
 		core::rect<s32> rect = imgrect + spec.pos;
 		drawItemStack(driver, m_font, item, rect, &AbsoluteClippingRect,
-				m_gamedef, false, false, false);
+				m_gamedef, IT_ROT_NONE);
 	}
 
 	/*
@@ -2452,7 +2454,7 @@ void GUIFormSpecMenu::drawMenu()
 	if (!item_hovered) {
 		drawItemStack(driver, m_font, ItemStack(),
 			core::rect<s32>(v2s32(0, 0), v2s32(0, 0)),
-			NULL, m_gamedef, false, true, false);
+			NULL, m_gamedef, IT_ROT_HOVERED);
 	}
 
 /* TODO find way to show tooltips on touchscreen */

src/hud.cpp

@@ -156,7 +156,7 @@ void Hud::drawItem(const ItemStack &item, const core::rect<s32>& rect,
 		if (!use_hotbar_image)
 			driver->draw2DRectangle(bgcolor2, rect, NULL);
 		drawItemStack(driver, g_fontengine->getFont(), item, rect, NULL,
-			gamedef, selected, false, false);
+			gamedef, selected ? IT_ROT_SELECTED : IT_ROT_NONE);
 	}
 
 //NOTE: selectitem = 0 -> no selected; selectitem 1-based
@@ -486,32 +486,26 @@ void Hud::resizeHotbar() {
 	}
 }
 
+struct MeshTimeInfo {
+	s32 time;
+	scene::IMesh *mesh;
+};
+
 void drawItemStack(video::IVideoDriver *driver,
 		gui::IGUIFont *font,
 		const ItemStack &item,
 		const core::rect<s32> &rect,
 		const core::rect<s32> *clip,
 		IGameDef *gamedef,
-		bool selected,
-		bool hovered,
-		bool dragged)
+		ItemRotationKind rotation_kind)
 {
-	static s32 hovered_time;
-	static s32 selected_time;
-	static s32 dragged_time;
-	static scene::IMesh *hovered_mesh;
-	static scene::IMesh *selected_mesh;
-	static scene::IMesh *dragged_mesh;
-	bool enable_animations =
+	static MeshTimeInfo rotation_time_infos[IT_ROT_NONE];
+	static bool enable_animations =
 		g_settings->getBool("inventory_items_animations");
 
 	if (item.empty()) {
-		if (selected) {
-			selected_mesh = NULL;
-		} else if (hovered) {
-			hovered_mesh = NULL;
-		} else if (dragged) {
-			dragged_mesh = NULL;
+		if (rotation_kind < IT_ROT_NONE) {
+			rotation_time_infos[rotation_kind].mesh = NULL;
 		}
 		return;
 	}
@@ -522,26 +516,13 @@ void drawItemStack(video::IVideoDriver *driver,
 	if (mesh) {
 		driver->clearZBuffer();
 		s32 delta = 0;
-		if (selected) {
-			if (mesh != selected_mesh) {
-				selected_mesh = mesh;
-				selected_time = getTimeMs();
+		if (rotation_kind < IT_ROT_NONE) {
+			MeshTimeInfo &ti = rotation_time_infos[rotation_kind];
+			if (mesh != ti.mesh) {
+				ti.mesh = mesh;
+				ti.time = getTimeMs();
 			} else {
-				delta = porting::getDeltaMs(selected_time, getTimeMs()) % 100000;
-			}
-		} else if (hovered) {
-			if (mesh != hovered_mesh) {
-				hovered_mesh = mesh;
-				hovered_time = getTimeMs();
-			} else {
-				delta = porting::getDeltaMs(hovered_time, getTimeMs()) % 100000;
-			}
-		} else if (dragged) {
-			if (mesh != dragged_mesh) {
-				dragged_mesh = mesh;
-				dragged_time = getTimeMs();
-			} else {
-				delta = porting::getDeltaMs(dragged_time, getTimeMs()) % 100000;
+				delta = porting::getDeltaMs(ti.time, getTimeMs()) % 100000;
 			}
 		}
 		core::rect<s32> oldViewPort = driver->getViewPort();

src/hud.h

@@ -147,15 +147,20 @@ private:
 	video::SColor hbar_colors[4];
 };
 
+enum ItemRotationKind {
+	IT_ROT_SELECTED,
+	IT_ROT_HOVERED,
+	IT_ROT_DRAGGED,
+	IT_ROT_NONE, // Must be last, also serves as number
+};
+
 void drawItemStack(video::IVideoDriver *driver,
 		gui::IGUIFont *font,
 		const ItemStack &item,
 		const core::rect<s32> &rect,
 		const core::rect<s32> *clip,
 		IGameDef *gamedef,
-		bool selected,
-		bool hovered,
-		bool dragged);
+		ItemRotationKind rotation_kind);
 
 #endif