Add list[] bgimg

doc/lua_api.txt

@@ -2911,6 +2911,9 @@ Some types may inherit styles from parent types.
     * noclip - boolean, set to true to allow the element to exceed formspec bounds.
     * size - 2d vector, sets the size of inventory slots in coordinates.
     * spacing - 2d vector, sets the space between inventory slots in coordinates.
+    * bgimg - slot background image. Defaults to none.
+    * bgimg_hovered - hovered slot background image.
+    * bgimg_middle - Makes the bgimg textures render in 9-sliced mode and defines the middle rect.
 * image_button (additional properties)
     * fgimg - standard image. Defaults to none.
     * fgimg_hovered - image when hovered. Defaults to fgimg when not provided.

src/gui/guiFormSpecMenu.cpp

@@ -538,10 +538,14 @@ void GUIFormSpecMenu::parseList(parserData *data, const std::string &element)
 				pos.X + (geom.X - 1) * slot_spacing.X + slot_size.X,
 				pos.Y + (geom.Y - 1) * slot_spacing.Y + slot_size.Y);
 
+		video::ITexture *bgimg = style.getTexture(StyleSpec::BGIMG, m_tsrc, nullptr);
+		video::ITexture *bgimg_hovered = style.getTexture(StyleSpec::BGIMG_HOVERED, m_tsrc, nullptr);
+		core::rect<s32> bgimg_middle = style.getRect(StyleSpec::BGIMG_MIDDLE, core::rect<s32>());
+
 		GUIInventoryList *e = new GUIInventoryList(Environment, data->current_parent,
 				spec.fid, rect, m_invmgr, loc, listname, geom, start_i,
-				v2s32(slot_size.X, slot_size.Y), slot_spacing, this,
+				v2s32(slot_size.X, slot_size.Y), slot_spacing, bgimg, bgimg_hovered,
-				data->inventorylist_options, m_font);
+				bgimg_middle, this, data->inventorylist_options, m_font);
 
 		e->setNotClipped(style.getBool(StyleSpec::NOCLIP, false));
 

src/gui/guiInventoryList.cpp

@@ -19,6 +19,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include "guiInventoryList.h"
 #include "guiFormSpecMenu.h"
+#include "client/guiscalingfilter.h"
 #include "client/hud.h"
 #include "client/client.h"
 
@@ -33,6 +34,9 @@ GUIInventoryList::GUIInventoryList(gui::IGUIEnvironment *env,
 	const s32 start_item_i,
 	const v2s32 &slot_size,
 	const v2f32 &slot_spacing,
+	video::ITexture* slotbg_n_texture,
+	video::ITexture* slotbg_h_texture,
+	const core::rect<s32> &slotbg_middle,
 	GUIFormSpecMenu *fs_menu,
 	const Options &options,
 	gui::IGUIFont *font) :
@@ -44,6 +48,9 @@ GUIInventoryList::GUIInventoryList(gui::IGUIEnvironment *env,
 	m_start_item_i(start_item_i),
 	m_slot_size(slot_size),
 	m_slot_spacing(slot_spacing),
+	m_slotbg_n_texture(slotbg_n_texture),
+	m_slotbg_h_texture(slotbg_h_texture),
+	m_slotbg_middle(slotbg_middle),
 	m_fs_menu(fs_menu),
 	m_options(options),
 	m_font(font),
@@ -109,6 +116,23 @@ void GUIInventoryList::draw()
 			(hovering ? IT_ROT_HOVERED : IT_ROT_NONE);
 
 		// layer 0
+		if (m_slotbg_n_texture) {
+			video::ITexture *texture = m_slotbg_n_texture;
+			if (hovering && m_slotbg_h_texture)
+				texture = m_slotbg_h_texture;
+
+			core::rect<s32> srcrect(core::position2d<s32>(0, 0),
+									core::dimension2di(texture->getOriginalSize()));
+			if (m_slotbg_middle.getArea() == 0) {
+				const video::SColor color(255, 255, 255, 255);
+				const video::SColor colors[] = {color, color, color, color};
+				draw2DImageFilterScaled(driver, texture, rect, srcrect,
+					&AbsoluteClippingRect, colors, true);
+			} else {
+				draw2DImage9Slice(driver, texture, rect, srcrect, m_slotbg_middle,
+					&AbsoluteClippingRect);
+			}
+		} else {
 			if (hovering) {
 				driver->draw2DRectangle(m_options.slotbg_h, rect, &AbsoluteClippingRect);
 			} else {
@@ -138,6 +162,7 @@ void GUIInventoryList::draw()
 					core::rect<s32>(v2s32(x2, y1),
 									v2s32(x2 + border, y2)), clipping_rect_ptr);
 			}
+		}
 
 		// layer 1
 		if (selected)

src/gui/guiInventoryList.h

@@ -69,6 +69,9 @@ public:
 		const s32 start_item_i,
 		const v2s32 &slot_size,
 		const v2f32 &slot_spacing,
+		video::ITexture* slotbg_n_texture,
+		video::ITexture* slotbg_h_texture,
+		const core::rect<s32> &slotbg_middle,
 		GUIFormSpecMenu *fs_menu,
 		const Options &options,
 		gui::IGUIFont *font);
@@ -117,6 +120,11 @@ private:
 	// specifies how large the space between slots is (space between is spacing-size)
 	const v2f32 m_slot_spacing;
 
+	// Slot textures
+	video::ITexture* m_slotbg_n_texture;
+	video::ITexture* m_slotbg_h_texture;
+	core::rect<s32> m_slotbg_middle;
+
 	// the GUIFormSpecMenu can have an item selected and co.
 	GUIFormSpecMenu *m_fs_menu;