add 'region' image property

src/graphics/ui/elements/Image.cpp

@@ -55,7 +55,7 @@ void Image::draw(const DrawContext& pctx, const Assets& assets) {
         0,
         0,
         0,
-        UVRegion(),
+        region,
         false,
         true,
         calcColor()
@@ -76,3 +76,7 @@ const std::string& Image::getTexture() const {
 void Image::setTexture(const std::string& name) {
     texture = name;
 }
+
+void Image::setRegion(const UVRegion& region) {
+    this->region = region;
+}

src/graphics/ui/elements/Image.hpp

@@ -1,11 +1,13 @@
 #pragma once
 
 #include "UINode.hpp"
+#include "maths/UVRegion.hpp"
 
 namespace gui {
     class Image : public UINode {
     protected:
         std::string texture;
+        UVRegion region {};
         bool autoresize = false;
     public:
         Image(GUI& gui, std::string texture, glm::vec2 size=glm::vec2(32,32));
@@ -16,5 +18,6 @@ namespace gui {
         virtual bool isAutoResize() const;
         virtual const std::string& getTexture() const;
         virtual void setTexture(const std::string& name);
+        void setRegion(const UVRegion& region);
     };
 }

src/graphics/ui/gui_xml.cpp

@@ -544,6 +544,11 @@ static std::shared_ptr<UINode> read_image(
     std::string src = element.attr("src", "").getText();
     auto image = std::make_shared<Image>(reader.getGUI(), src);
     read_uinode(reader, element, *image);
+
+    if (element.has("region")) {
+        auto vec = element.attr("region").asVec4();
+        image->setRegion(UVRegion(vec.x, vec.y, vec.z, vec.w));
+    }
     return image;
 }
 

src/logic/scripting/lua/libs/libgui.cpp

@@ -659,6 +659,12 @@ static void p_set_src(UINode* node, lua::State* L, int idx) {
         iframe->setSrc(lua::require_string(L, idx));
     }
 }
+static void p_set_region(UINode* node, lua::State* L, int idx) {
+    if (auto image = dynamic_cast<Image*>(node)) {
+        auto vec = lua::tovec4(L, idx);
+        image->setRegion(UVRegion(vec.x, vec.y, vec.z, vec.w));
+    }
+}
 static void p_set_value(UINode* node, lua::State* L, int idx) {
     if (auto bar = dynamic_cast<TrackBar*>(node)) {
         bar->setValue(lua::tonumber(L, idx));
@@ -785,6 +791,7 @@ static int l_gui_setattr(lua::State* L) {
             {"inventory", p_set_inventory},
             {"cursor", p_set_cursor},
             {"focused", p_set_focused},
+            {"region", p_set_region},
         };
     auto func = setters.find(attr);
     if (func != setters.end()) {