GUI: Box drawing

assets/shaders/includes/gui_image_common.glsl

@@ -0,0 +1,17 @@
+struct Image {
+    vec4 tint;
+    vec2 positionSSPX;
+    vec2 sizePX;
+    vec2 uvMin;
+    vec2 uvMax;
+    uint16_t textureId;
+};
+
+#include "global_uniforms.glsl"
+
+layout(set = 0, binding = 1, scalar) readonly buffer Images {
+    Image _Images[];
+};
+
+layout(set = 0, binding = 2) uniform sampler _Sampler;
+layout(set = 0, binding = 3) uniform texture2D _Textures[];