Bump version

assets/shaders/fragment/g_buffer.glsl

@@ -0,0 +1,30 @@
+# version 330 core
+
+layout(location  = 0) out vec3 fragPosition;
+layout (location = 1) out vec4 fragColor;
+layout (location = 2) out vec3 fragNormal;
+layout (location = 3) out vec3 fragUV;
+
+in vec3 outPosition, outColor, outNormal, outUV, outFragPos, outCameraPos;
+out vec4 outputFragColor;
+flat in int outHasTexture;
+
+uniform sampler2D diffuse_texture;
+
+void main() {
+  vec3 result;
+
+  if (outHasTexture == 0) {
+    result = outColor;
+  } else {
+    result = texture(diffuse_texture, outUV.xy).xyz + 0.25;
+  }
+
+  fragPosition = outPosition;
+  fragColor = vec4(result, 1.0);
+  fragNormal = outNormal;
+  fragUV = outUV;
+
+  float gamma = 2.2;
+  outputFragColor.rgb = pow(fragColor.rgb, vec3(1.0 / gamma));
+}

assets/shaders/fragment/lighting.glsl

@@ -0,0 +1,63 @@
+#version 330 core
+out vec4 FragColor;
+
+@include "light_struct"
+const int DIRECTIONAL = 0;
+const int POINT = 1;
+const int SPOT = 2;
+
+in vec2 outTexCoords;
+flat in Light outLight[1];
+
+uniform sampler2D diffuse, position, texcoord, normal, depth;
+
+vec4 directionalLight(Light light) {
+  vec3 norm = normalize(texture(normal, outTexCoords).rgb);
+  vec3 diffuse_color = texture(diffuse, outTexCoords).rgb;
+  vec3 fragPos = texture(position, outTexCoords).rgb;
+
+  vec3 lightDir = normalize(light.position - fragPos);
+  float diff = max(dot(norm, lightDir), 0);
+
+  vec3 _ambient = light.ambient;
+  vec3 _diffuse = light.diffuse * diff;
+  vec3 _specular = light.specular;
+
+  return vec4(_diffuse + _ambient + _specular, 1.0);
+}
+
+vec4 pointLight(Light light) {
+  return vec4(0.25, 0.25, 0.25, 1);
+}
+
+vec4 spotLight(Light light) {
+  return vec4(0.5, 0.5, 0.5, 1);
+}
+
+vec4 calculateLighting(Light light) {
+  vec4 result;
+
+  // switch(light.type) {
+  //   case DIRECTIONAL: {
+  //     result = directionalLight(light);
+  //   }
+  //   case SPOT: {
+  //     result = spotLight(light);
+  //   }
+  //   default: {
+  //     result = pointLight(light);
+  //   }
+  // }
+
+  if (light.type == DIRECTIONAL) {
+    result = directionalLight(light);
+  } else {
+    result = pointLight(light);
+  }
+
+  return result;
+}
+
+void main() {
+  FragColor = texture(diffuse, outTexCoords) * calculateLighting(outLight[0]);
+}

assets/shaders/include/light_struct.glsl

@@ -0,0 +1,11 @@
+struct Light {
+  int  type;
+  vec3 direction;
+  vec3 position;
+
+  vec3 diffuse;
+  vec3 ambient;
+  vec3 specular;
+
+  float intensity;
+};

assets/shaders/vertex/g_buffer.glsl

@@ -0,0 +1,28 @@
+# version 330 core
+
+layout(location = 0) in vec3 inPosition;
+layout(location = 1) in vec3 inColor;
+layout(location = 2) in vec3 inNormal;
+layout(location = 3) in vec3 inUV;
+
+uniform mat4 projection, view, model;
+uniform int hasTexture;
+uniform vec3 cameraPos;
+
+out vec3 outPosition, outColor, outNormal, outUV;
+out vec3 outFragPos, outViewPos, outCameraPos;
+flat out int outHasTexture;
+
+void main() {
+  // projection * view * model * position
+  outPosition = inPosition;
+  outColor = inColor;
+  outNormal= normalize(transpose(inverse(mat3(model))) * inNormal);
+  outUV    = inUV;
+  outHasTexture = hasTexture;
+  outCameraPos = cameraPos;
+
+  outFragPos = vec3(model * vec4(inPosition, 1.0));
+
+  gl_Position = projection * view * model * vec4(inPosition, 1.0);
+}

assets/shaders/vertex/lighting.glsl

@@ -0,0 +1,17 @@
+#version 330 core
+@include "light_struct"
+
+layout (location = 0) in vec3 inPosition;
+layout (location = 1) in vec2 inTexCoords;
+
+uniform sampler2D diffuse, position, texcoord, normal, depth;
+uniform Light light[1];
+
+out vec2 outTexCoords;
+flat out Light outLight[1];
+
+void main() {
+  gl_Position = vec4(inPosition.x, inPosition.y, inPosition.z, 1.0);
+  outTexCoords = inTexCoords;
+  outLight = light;
+}

cyberarm_engine.gemspec

@@ -27,8 +27,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = %w[lib assets]
 
-  spec.add_dependency "clipboard", "~> 1.3.5"
+  spec.add_dependency "excon", "~> 0.88"
-  spec.add_dependency "excon", "~> 0.78.0"
   spec.add_dependency "gosu", "~> 1.1"
   spec.add_dependency "gosu_more_drawables", "~> 0.3"
   # spec.add_dependency "ffi", :platforms => [:mswin, :mingw] # Required by Clipboard on Windows

lib/cyberarm_engine.rb

@@ -8,7 +8,6 @@ end
 require "json"
 require "excon"
 require "gosu_more_drawables"
-require "clipboard"
 
 require_relative "cyberarm_engine/version"
 require_relative "cyberarm_engine/stats"
@@ -24,6 +23,7 @@ require_relative "cyberarm_engine/transform"
 require_relative "cyberarm_engine/ray"
 require_relative "cyberarm_engine/background"
 require_relative "cyberarm_engine/background_nine_slice"
+require_relative "cyberarm_engine/background_image"
 require_relative "cyberarm_engine/animator"
 
 require_relative "cyberarm_engine/text"

lib/cyberarm_engine/background_image.rb

@@ -0,0 +1,93 @@
+module CyberarmEngine
+  class BackgroundImage
+    include CyberarmEngine::Common
+    attr_accessor :x, :y, :z, :mode
+    attr_reader :image, :width, :height, :color
+
+    def initialize(image_path: nil, x: 0, y: 0, z: 0, width: 0, height: 0, mode: :fill, color: Gosu::Color::WHITE)
+      @image_path = image_path
+      @image = get_image(image_path) if image_path
+
+      @x = x
+      @y = y
+      @z = z
+      @width = width
+      @height = height
+
+      @mode = mode
+
+      @color = color
+
+      @cached_tiling = nil
+    end
+
+    def image=(image_path)
+      @cached_tiling = nil if image_path != @image_path
+      @image_path = image_path
+      @image = image_path ? get_image(image_path) : image_path
+    end
+
+    def width=(n)
+      @cached_tiling = nil if @width != n
+      @width = n
+    end
+
+    def height=(n)
+      @cached_tiling = nil if @height != n
+      @height = n
+    end
+
+    def color=(c)
+      @cached_tiling = nil if @color != c
+      @color = c
+    end
+
+    def width_scale
+      (@width.to_f / @image.width).abs
+    end
+
+    def height_scale
+      (@height.to_f / @image.height).abs
+    end
+
+    def draw
+      return unless @image
+
+      Gosu.clip_to(@x, @y, @width, @height) do
+        send(:"draw_#{mode}")
+      end
+    end
+
+    def draw_stretch
+      @image.draw(@x, @y, @z, width_scale, height_scale, @color)
+    end
+
+    def draw_tiled
+      @cached_tiling ||= Gosu.record(@width, @height) do
+        height_scale.ceil.times do |y|
+          width_scale.ceil.times do |x|
+            @image.draw(x * @image.width, y * @image.height, @z, 1, 1, @color)
+          end
+        end
+      end
+
+      @cached_tiling.draw(@x, @y, @z)
+    end
+
+    def draw_fill
+      if (@image.width * width_scale) >= @width && (@image.height * width_scale) >= @height
+        draw_fill_width
+      else
+        draw_fill_height
+      end
+    end
+
+    def draw_fill_width
+      @image.draw(@x, @y, @z, width_scale, width_scale, @color)
+    end
+
+    def draw_fill_height
+      @image.draw(@x, @y, @z, height_scale, height_scale, @color)
+    end
+  end
+end

lib/cyberarm_engine/builtin/intro_state.rb

@@ -7,8 +7,8 @@ module CyberarmEngine
       @title_size = 56
       @caption_size = 24
 
-      @title = CyberarmEngine::Text.new("", size: @title_size, shadow_color: 0xaa_222222)
+      @title = CyberarmEngine::Text.new("", size: @title_size, shadow_color: 0xaa_222222, static: true)
-      @caption = CyberarmEngine::Text.new("", size: @caption_size, shadow_color: 0xaa_222222)
+      @caption = CyberarmEngine::Text.new("", size: @caption_size, shadow_color: 0xaa_222222, static: true)
 
       @spacer_width = 256
       @spacer_height = 6

lib/cyberarm_engine/common.rb

@@ -8,8 +8,11 @@ module CyberarmEngine
       window.current_state
     end
 
-    def previous_state
+    def previous_state(state = nil)
-      window.previous_state
+      raise "Only available for CyberarmEngine::GameState and subclasses" unless is_a?(CyberarmEngine::GameState) || state.is_a?(CyberarmEngine::GameState)
+
+      i = window.states.index(state || self)
+      window.states[i - 1] unless (i - 1).negative?
     end
 
     def pop_state
@@ -28,6 +31,18 @@ module CyberarmEngine
       window.show_cursor = boolean
     end
 
+    def find_element_by_tag(container, tag, list = [])
+      return unless container
+
+      container.children.each do |child|
+        list << child if child.style.tag == tag
+
+        find_element_by_tag(child, tag, list) if child.is_a?(CyberarmEngine::Element::Container)
+      end
+
+      list.first
+    end
+
     def draw_rect(x, y, width, height, color, z = 0, mode = :default)
       Gosu.draw_rect(x, y, width, height, color, z, mode)
     end
@@ -95,7 +110,7 @@ module CyberarmEngine
     end
 
     def window
-      $window
+      CyberarmEngine::Window.instance
     end
 
     def control_down?

lib/cyberarm_engine/game_object.rb

@@ -7,7 +7,7 @@ module CyberarmEngine
     attr_reader :alpha
 
     def initialize(options = {})
-      $window.current_state.add_game_object(self) if options[:auto_manage] || options[:auto_manage].nil?
+      window.current_state.add_game_object(self) if options[:auto_manage] || options[:auto_manage].nil?
 
       @options = options
       @image = options[:image] ? image(options[:image]) : nil
@@ -55,9 +55,9 @@ module CyberarmEngine
 
       if $debug
         show_debug_heading
-        $window.draw_circle(@position.x, @position.y, radius, 9999, @debug_color)
+        Gosu.draw_circle(@position.x, @position.y, radius, 9999, @debug_color)
         if @debug_text.text != ""
-          $window.draw_rect(@debug_text.x - 10, (@debug_text.y - 10), @debug_text.width + 20, @debug_text.height + 20,
+          Gosu.draw_rect(@debug_text.x - 10, (@debug_text.y - 10), @debug_text.width + 20, @debug_text.height + 20,
                             Gosu::Color.rgba(0, 0, 0, 200), 9999)
           @debug_text.draw
         end
@@ -102,13 +102,13 @@ module CyberarmEngine
     end
 
     def _x_visible
-      x.between?(($window.width / 2) - @world_center_point.x, ($window.width / 2) + @world_center_point.x) ||
+      x.between?((window.width / 2) - @world_center_point.x, (window.width / 2) + @world_center_point.x) ||
-        x.between?((@world_center_point.x - $window.width / 2), ($window.width / 2) + @world_center_point.x)
+        x.between?((@world_center_point.x - window.width / 2), (window.width / 2) + @world_center_point.x)
     end
 
     def _y_visible
-      y.between?(($window.height / 2) - @world_center_point.y, ($window.height / 2) + @world_center_point.y) ||
+      y.between?((window.height / 2) - @world_center_point.y, (window.height / 2) + @world_center_point.y) ||
-        y.between?(@world_center_point.y - ($window.height / 2), ($window.height / 2) + @world_center_point.y)
+        y.between?(@world_center_point.y - (window.height / 2), (window.height / 2) + @world_center_point.y)
     end
 
     def heading(ahead_by = 100, _object = nil, angle_only = false)
@@ -153,10 +153,6 @@ module CyberarmEngine
       @color = Gosu::Color.rgba(@color.red, @color.green, @color.blue, int)
     end
 
-    def draw_rect(x, y, width, height, color, z = 0)
-      $window.draw_rect(x, y, width, height, color, z)
-    end
-
     def button_up(id)
     end
 
@@ -190,12 +186,12 @@ module CyberarmEngine
     # Duplication... so DRY.
     def each_circle_collision(object, _resolve_with = :width, &block)
       if object.class != Class && object.instance_of?(object.class)
-        $window.current_state.game_objects.select { |i| i.instance_of?(object.class) }.each do |o|
+        window.current_state.game_objects.select { |i| i.instance_of?(object.class) }.each do |o|
           distance = Gosu.distance(x, y, object.x, object.y)
           block.call(o, object) if distance <= radius + object.radius && block
         end
       else
-        list = $window.current_state.game_objects.select { |i| i.instance_of?(object) }
+        list = window.current_state.game_objects.select { |i| i.instance_of?(object) }
         list.each do |o|
           next if self == o
 
@@ -206,9 +202,9 @@ module CyberarmEngine
     end
 
     def destroy
-      if $window.current_state
+      if window.current_state
-        $window.current_state.game_objects.each do |o|
+        window.current_state.game_objects.each do |o|
-          $window.current_state.game_objects.delete(o) if o.is_a?(self.class) && o == self
+          window.current_state.game_objects.delete(o) if o.is_a?(self.class) && o == self
         end
       end
     end
@@ -220,13 +216,13 @@ module CyberarmEngine
 
     def self.each_circle_collision(object, _resolve_with = :width, &block)
       if object.class != Class && object.instance_of?(object.class)
-        $window.current_state.game_objects.select { |i| i.instance_of?(self) }.each do |o|
+        window.current_state.game_objects.select { |i| i.instance_of?(self) }.each do |o|
           distance = Gosu.distance(o.x, o.y, object.x, object.y)
           block.call(o, object) if distance <= o.radius + object.radius && block
         end
       else
-        lista = $window.current_state.game_objects.select { |i| i.instance_of?(self) }
+        lista = window.current_state.game_objects.select { |i| i.instance_of?(self) }
-        listb = $window.current_state.game_objects.select { |i| i.instance_of?(object) }
+        listb = window.current_state.game_objects.select { |i| i.instance_of?(object) }
         lista.product(listb).each do |o, o2|
           next if o == o2
 
@@ -238,9 +234,9 @@ module CyberarmEngine
 
     def self.destroy_all
       INSTANCES.clear
-      if $window.current_state
+      if window.current_state
-        $window.current_state.game_objects.each do |o|
+        window.current_state.game_objects.each do |o|
-          $window.current_state.game_objects.delete(o) if o.is_a?(self.class)
+          window.current_state.game_objects.delete(o) if o.is_a?(self.class)
         end
       end
     end

lib/cyberarm_engine/game_state.rb

@@ -9,7 +9,7 @@ module CyberarmEngine
       @options = options
       @game_objects = []
       @global_pause = false
-      $window.text_input = nil unless options[:preserve_text_input]
+      window.text_input = nil unless options[:preserve_text_input]
 
       @down_keys = {}
     end
@@ -30,48 +30,27 @@ module CyberarmEngine
       @game_objects.each(&:update)
     end
 
-    def draw_bounding_box(box)
+    def needs_redraw?
-      x = box.x
+      true
-      y = box.y
-      max_x = box.max_x
-      max_y = box.max_y
-
-      color = Gosu::Color.rgba(255, 127, 64, 240)
-
-      # pipe = 4
-      # Gosu.draw_rect(x-width, y-height, x+(width*2), y+(height*2), color, Float::INFINITY)
-      # puts "BB render: #{x}:#{y} w:#{x.abs+width} h:#{y.abs+height}"
-      # Gosu.draw_rect(x, y, x.abs+width, y.abs+height, color, Float::INFINITY)
-
-      # TOP LEFT to BOTTOM LEFT
-      $window.draw_line(
-        x, y, color,
-        x, max_y, color,
-        Float::INFINITY
-      )
-      # BOTTOM LEFT to BOTTOM RIGHT
-      $window.draw_line(
-        x, max_y, color,
-        max_x, max_y, color,
-        Float::INFINITY
-      )
-      # BOTTOM RIGHT to TOP RIGHT
-      $window.draw_line(
-        max_x, max_y, color,
-        max_x, y, color,
-        Float::INFINITY
-      )
-      # TOP RIGHT to TOP LEFT
-      $window.draw_line(
-        max_x, y, color,
-        x, y, color,
-        Float::INFINITY
-      )
     end
 
-    def destroy
+    def needs_repaint?
-      @options.clear
+      true
-      @game_objects.clear
+    end
+
+    def drop(filename)
+    end
+
+    def gamepad_connected(index)
+    end
+
+    def gamepad_disconnected(index)
+    end
+
+    def gain_focus
+    end
+
+    def lose_focus
     end
 
     def button_down(id)
@@ -90,6 +69,54 @@ module CyberarmEngine
       end
     end
 
+    def close
+      window.close!
+    end
+
+    def draw_bounding_box(box)
+      x = box.x
+      y = box.y
+      max_x = box.max_x
+      max_y = box.max_y
+
+      color = Gosu::Color.rgba(255, 127, 64, 240)
+
+      # pipe = 4
+      # Gosu.draw_rect(x-width, y-height, x+(width*2), y+(height*2), color, Float::INFINITY)
+      # puts "BB render: #{x}:#{y} w:#{x.abs+width} h:#{y.abs+height}"
+      # Gosu.draw_rect(x, y, x.abs+width, y.abs+height, color, Float::INFINITY)
+
+      # TOP LEFT to BOTTOM LEFT
+      Gosu.draw_line(
+        x, y, color,
+        x, max_y, color,
+        Float::INFINITY
+      )
+      # BOTTOM LEFT to BOTTOM RIGHT
+      Gosu.draw_line(
+        x, max_y, color,
+        max_x, max_y, color,
+        Float::INFINITY
+      )
+      # BOTTOM RIGHT to TOP RIGHT
+      Gosu.draw_line(
+        max_x, max_y, color,
+        max_x, y, color,
+        Float::INFINITY
+      )
+      # TOP RIGHT to TOP LEFT
+      Gosu.draw_line(
+        max_x, y, color,
+        x, y, color,
+        Float::INFINITY
+      )
+    end
+
+    def destroy
+      @options.clear
+      @game_objects.clear
+    end
+
     def add_game_object(object)
       @game_objects << object
     end

lib/cyberarm_engine/opengl.rb

@@ -11,7 +11,19 @@ module CyberarmEngine
     if e != GL_NO_ERROR
       warn "OpenGL error detected by handler at: #{caller[0]}"
       warn "    #{gluErrorString(e)} (#{e})\n"
-      exit if window.exit_on_opengl_error?
+      exit if Window.instance&.exit_on_opengl_error?
+    end
+  end
+
+  def preload_default_shaders
+    shaders = %w[g_buffer lighting]
+    shaders.each do |shader|
+      Shader.new(
+        name: shader,
+        includes_dir: "#{CYBERARM_ENGINE_ROOT_PATH}/assets/shaders/include",
+        vertex: "#{CYBERARM_ENGINE_ROOT_PATH}/assets/shaders/vertex/#{shader}.glsl",
+        fragment: "#{CYBERARM_ENGINE_ROOT_PATH}/assets/shaders/fragment/#{shader}.glsl"
+      )
     end
   end
 end

lib/cyberarm_engine/opengl/renderer/g_buffer.rb

@@ -1,6 +1,7 @@
 module CyberarmEngine
   class GBuffer
     attr_reader :screen_vbo, :vertices, :uvs
+    attr_reader :width, :height
 
     def initialize(width:, height:)
       @width = width

lib/cyberarm_engine/opengl/renderer/renderer.rb

@@ -4,7 +4,7 @@ module CyberarmEngine
 
     def initialize
       @bounding_box_renderer = BoundingBoxRenderer.new
-      @opengl_renderer = OpenGLRenderer.new(width: $window.width, height: $window.height)
+      @opengl_renderer = OpenGLRenderer.new(width: CyberarmEngine::Window.instance.width, height: CyberarmEngine::Window.instance.height)
     end
 
     def draw(camera, lights, entities)

lib/cyberarm_engine/text.rb

@@ -22,19 +22,21 @@ module CyberarmEngine
       else
         @color = Gosu::Color::WHITE
       end
-      @mode     = options[:mode]      || :default
+      @mode      = options[:mode]      || :default
       @alignment = options[:alignment] || nil
 
       @border   = options[:border]
       @border   = true if options[:border].nil?
       @border_size = options[:border_size] || 1
       @border_alpha = options[:border_alpha] || 30
-      @border_color = options[:border_color]
+      @border_color = options[:border_color] || Gosu::Color::BLACK
 
       @shadow = options[:shadow]
       @shadow_size = options[:shadow_size] || 2
       @shadow_alpha = options[:shadow_alpha] || 30
-      @shadow_color = options[:shadow_color]
+      @shadow_color = options[:shadow_color] || Gosu::Color::BLACK
+
+      @static = options[:static] || (options[:static].nil? || options[:static] == false ? false : true)
 
       @textobject = check_cache(@size, @font)
 
@@ -43,9 +45,9 @@ module CyberarmEngine
         when :left
           @x = 0 + BUTTON_PADDING
         when :center
-          @x = ($window.width / 2) - (@textobject.text_width(@text) / 2)
+          @x = (CyberarmEngine::Window.instance.width / 2) - (@textobject.text_width(@text) / 2)
         when :right
-          @x = $window.width - BUTTON_PADDING - @textobject.text_width(@text)
+          @x = CyberarmEngine::Window.instance.width - BUTTON_PADDING - @textobject.text_width(@text)
         end
       end
     end
@@ -84,46 +86,49 @@ module CyberarmEngine
     end
 
     def text=(string)
-      @rendered_border = nil
+      invalidate_cache! if @text != string
       @text = string
     end
 
     def factor_x=(n)
-      @rendered_border = nil
+      invalidate_cache! if @factor_x != n
       @factor_x = n
     end
 
     def factor_y=(n)
-      @rendered_border = nil
+      invalidate_cache! if @factor_y != n
       @factor_y = n
     end
 
     def color=(color)
-      @rendered_border = nil
+      old_color = @color
+
       if color
         @color = color.is_a?(Gosu::Color) ? color : Gosu::Color.new(color)
       else
         raise "color cannot be nil"
       end
+
+      invalidate_cache! if old_color != color
     end
 
     def border=(boolean)
-      @rendered_border = nil
+      invalidate_cache! if @border != boolean
       @border = boolean
     end
 
     def border_size=(n)
-      @rendered_border = nil
+      invalidate_cache! if @border_size != n
       @border_size = n
     end
 
     def border_alpha=(n)
-      @rendered_border = nil
+      invalidate_cache! if @border_alpha != n
       @border_alpha = n
     end
 
     def border_color=(n)
-      @rendered_border = nil
+      invalidate_cache! if @border_color != n
       @border_color = n
     end
 
@@ -132,11 +137,27 @@ module CyberarmEngine
     end
 
     def text_width(text = @text)
-      textobject.text_width(text) + @border_size + @shadow_size
+      spacing = 0
+      spacing += @border_size if @border
+      spacing += @shadow_size if @shadow
+
+      if text == @text && @static && @gosu_cached_text_image
+        @gosu_cached_text_image&.width + spacing
+      else
+        textobject.text_width(text) + spacing
+      end
     end
 
     def markup_width(text = @text)
-      textobject.markup_width(text) + @border_size + @shadow_size
+      spacing = 0
+      spacing += @border_size if @border
+      spacing += @shadow_size if @shadow
+
+      if text == @text && @static && @gosu_cached_text_image
+        @gosu_cached_text_image&.width + spacing
+      else
+        textobject.markup_width(text) + spacing
+      end
     end
 
     def height(text = @text)
@@ -148,39 +169,72 @@ module CyberarmEngine
     end
 
     def draw(method = :draw_markup)
-      if @border && !ARGV.join.include?("--no-border")
+      if @static
-        border_alpha = @color.alpha <= 30 ? @color.alpha : @border_alpha
+        if @border && !@cached_text_border_image
-        border_color = @border_color || Gosu::Color.rgba(@color.red, @color.green, @color.blue,
+          _x = @border_size
-                                                         border_alpha)
+          _y = @border_size
-        white = Gosu::Color::WHITE
+          _width = method == :draw_markup ? text_width : markup_width
+          img = Gosu::Image.send(:"from_#{method.to_s.split("_").last}", @text, @size, font: @font)
 
-        _x = @border_size
+          @cached_text_border_image = Gosu.render((_width + (@border_size * 2)).ceil, (height + (@border_size * 2)).ceil) do
-        _y = @border_size
+            img.draw(-_x, 0, @z, @factor_x, @factor_y, @border_color, @mode)
-        _width = method == :draw_markup ? text_width : markup_width
+            img.draw(-_x, -_y, @z, @factor_x, @factor_y, @border_color, @mode)
 
-        @rendered_border ||= Gosu.render((_width + (border_size * 2)).ceil, (height + (@border_size * 2)).ceil) do
+            img.draw(0, -_y, @z, @factor_x, @factor_y, @border_color, @mode)
-          @textobject.send(method, @text, _x - @border_size, _y, @z, @factor_x, @factor_y, white, @mode)
+            img.draw(_x, -_y, @z, @factor_x, @factor_y, @border_color, @mode)
-          @textobject.send(method, @text, _x - @border_size, _y - @border_size, @z, @factor_x, @factor_y, white, @mode)
 
-          @textobject.send(method, @text, _x, _y - @border_size, @z, @factor_x, @factor_y, white, @mode)
+            img.draw(_x, 0, @z, @factor_x, @factor_y, @border_color, @mode)
-          @textobject.send(method, @text, _x + @border_size, _y - @border_size, @z, @factor_x, @factor_y, white, @mode)
+            img.draw(_x, _y, @z, @factor_x, @factor_y, @border_color, @mode)
 
-          @textobject.send(method, @text, _x, _y + @border_size, @z, @factor_x, @factor_y, white, @mode)
+            img.draw(0, _y, @z, @factor_x, @factor_y, @border_color, @mode)
-          @textobject.send(method, @text, _x - @border_size, _y + @border_size, @z, @factor_x, @factor_y, white, @mode)
+            img.draw(-_x, _y, @z, @factor_x, @factor_y, @border_color, @mode)
-
+          end
-          @textobject.send(method, @text, _x + @border_size, _y, @z, @factor_x, @factor_y, white, @mode)
-          @textobject.send(method, @text, _x + @border_size, _y + @border_size, @z, @factor_x, @factor_y, white, @mode)
         end
 
-        @rendered_border.draw(@x - @border_size, @y - @border_size, @z, @factor_x, @factor_y, border_color)
+        @cached_text_shadow_image ||= Gosu::Image.send(:"from_#{method.to_s.split("_").last}", @text, @size, font: @font) if @shadow
-      end
 
-      if @shadow
+        @gosu_cached_text_image ||= Gosu::Image.send(:"from_#{method.to_s.split("_").last}", @text, @size, font: @font)
-        shadow_color = @shadow_color || Gosu::Color.rgba(@color.red, @color.green, @color.blue, @shadow_alpha)
-        @textobject.send(method, @text, @x + @shadow_size, @y + @shadow_size, @z, @factor_x, @factor_y, shadow_color, @mode)
-      end
 
-      @textobject.send(method, @text, @x, @y, @z, @factor_x, @factor_y, @color, @mode)
+        @cached_text_border_image.draw(@x, @y, @z, @factor_x, @factor_y, @border_color, @mode) if @border
+
+        @cached_text_shadow_image.draw(@x + @shadow_size, @y + @shadow_size, @z, @factor_x, @factor_y, @shadow_color, @mode) if @shadow
+
+        @gosu_cached_text_image.draw(@x, @y, @z, @factor_x, @factor_y, @color, @mode)
+      else
+        if @border && !ARGV.join.include?("--no-border")
+          border_alpha = @color.alpha <= 30 ? @color.alpha : @border_alpha
+          border_color = @border_color || Gosu::Color.rgba(@color.red, @color.green, @color.blue,
+                                                          border_alpha)
+          white = Gosu::Color::WHITE
+
+          _x = @border_size
+          _y = @border_size
+          _width = method == :draw_markup ? text_width : markup_width
+
+          @cached_text_border_image ||= Gosu.render((_width + (border_size * 2)).ceil, (height + (@border_size * 2)).ceil) do
+            @textobject.send(method, @text, _x - @border_size, _y, @z, @factor_x, @factor_y, white, @mode)
+            @textobject.send(method, @text, _x - @border_size, _y - @border_size, @z, @factor_x, @factor_y, white, @mode)
+
+            @textobject.send(method, @text, _x, _y - @border_size, @z, @factor_x, @factor_y, white, @mode)
+            @textobject.send(method, @text, _x + @border_size, _y - @border_size, @z, @factor_x, @factor_y, white, @mode)
+
+            @textobject.send(method, @text, _x, _y + @border_size, @z, @factor_x, @factor_y, white, @mode)
+            @textobject.send(method, @text, _x - @border_size, _y + @border_size, @z, @factor_x, @factor_y, white, @mode)
+
+            @textobject.send(method, @text, _x + @border_size, _y, @z, @factor_x, @factor_y, white, @mode)
+            @textobject.send(method, @text, _x + @border_size, _y + @border_size, @z, @factor_x, @factor_y, white, @mode)
+          end
+
+          @cached_text_border_image.draw(@x - @border_size, @y - @border_size, @z, @factor_x, @factor_y, border_color)
+        end
+
+        if @shadow
+          shadow_color = @shadow_color || Gosu::Color.rgba(@color.red, @color.green, @color.blue, @shadow_alpha)
+          @textobject.send(method, @text, @x + @shadow_size, @y + @shadow_size, @z, @factor_x, @factor_y, shadow_color, @mode)
+        end
+
+        @textobject.send(method, @text, @x, @y, @z, @factor_x, @factor_y, @color, @mode)
+      end
     end
 
     def alpha=(n)
@@ -193,5 +247,11 @@ module CyberarmEngine
 
     def update
     end
+
+    def invalidate_cache!
+      @cached_text_border_image = nil
+      @cached_text_shadow_image = nil
+      @gosu_cached_text_image = nil
+    end
   end
 end

lib/cyberarm_engine/ui/border_canvas.rb

@@ -62,11 +62,11 @@ module CyberarmEngine
 
     def update
       # TOP
-      @top.x = @element.x # + @element.border_thickness_left
+      @top.x = @element.x + @element.style.border_thickness_left
       @top.y = @element.y
       @top.z = @element.z
 
-      @top.width  = @element.width
+      @top.width  = @element.width - @element.style.border_thickness_left
       @top.height = @element.style.border_thickness_top
 
       # RIGHT

lib/cyberarm_engine/ui/dsl.rb

@@ -116,7 +116,7 @@ module CyberarmEngine
     end
 
     private def element_parent
-      $__current_container__
+      CyberarmEngine::Element::Container.current_container
     end
 
     private def container(klass, options = {}, &block)
@@ -126,12 +126,12 @@ module CyberarmEngine
       _container = klass.new(options, block)
 
       old_parent = element_parent
-      $__current_container__ = _container
+      CyberarmEngine::Element::Container.current_container = _container
 
       _container.build
       _container.parent.add(_container)
 
-      $__current_container__ = old_parent
+      CyberarmEngine::Element::Container.current_container = old_parent
 
       _container
     end

lib/cyberarm_engine/ui/element.rb

@@ -4,7 +4,7 @@ module CyberarmEngine
     include Event
     include Common
 
-    attr_accessor :x, :y, :z, :enabled, :tip
+    attr_accessor :x, :y, :z, :tip, :element_visible
     attr_reader :parent, :options, :style, :event_handler, :background_canvas, :border_canvas
 
     def initialize(options = {}, block = nil)
@@ -13,9 +13,9 @@ module CyberarmEngine
       @options = options
       @block = block
 
-      @focus   = @options[:focus].nil?   ? false : @options[:focus]
+      @focus   = !@options.key?(:focus)   ? false : @options[:focus]
-      @enabled = @options[:enabled].nil? ? true  : @options[:enabled]
+      @enabled = !@options.key?(:enabled) ? true  : @options[:enabled]
-      @visible = @options[:visible].nil? ? true  : @options[:visible]
+      @visible = !@options.key?(:visible) ? true  : @options[:visible]
       @tip     = @options[:tip] || ""
 
       @debug_color = @options[:debug_color].nil? ? Gosu::Color::RED : @options[:debug_color]
@@ -24,6 +24,7 @@ module CyberarmEngine
 
       @root ||= nil
       @gui_state ||= nil
+      @element_visible = true
 
       @x = @style.x
       @y = @style.y
@@ -37,6 +38,7 @@ module CyberarmEngine
 
       @style.background_canvas = Background.new
       @style.background_nine_slice_canvas = BackgroundNineSlice.new
+      @style.background_image_canvas = BackgroundImage.new
       @style.border_canvas = BorderCanvas.new(element: self)
 
       @style_event = :default
@@ -51,14 +53,20 @@ module CyberarmEngine
     def stylize
       set_static_position
 
+      set_color
+      set_font
+
       set_padding
       set_margin
 
       set_background
       set_background_nine_slice
+      set_background_image
 
       set_border_thickness
       set_border_color
+
+      root.gui_state.request_repaint
     end
 
     def safe_style_fetch(*args)
@@ -70,6 +78,15 @@ module CyberarmEngine
       @y = @style.y if @style.y != 0
     end
 
+    def set_color
+      @style.color = safe_style_fetch(:color)
+      @text&.color = @style.color
+    end
+
+    def set_font
+      @text&.swap_font(safe_style_fetch(:text_size), safe_style_fetch(:font))
+    end
+
     def set_background
       @style.background = safe_style_fetch(:background)
 
@@ -91,6 +108,14 @@ module CyberarmEngine
       @style.background_nine_slice_bottom    = safe_style_fetch(:background_nine_slice_bottom) || @style.background_nine_slice_from_edge
     end
 
+    def set_background_image
+      @style.background_image = safe_style_fetch(:background_image)
+      @style.background_image_mode = safe_style_fetch(:background_image_mode) || :stretch
+      @style.background_image_color = safe_style_fetch(:background_image_color) || Gosu::Color::WHITE
+      @style.background_image_canvas.mode = @style.background_image_mode
+      @style.background_image_canvas.color = @style.background_image_color
+    end
+
     def set_border_thickness
       @style.border_thickness = safe_style_fetch(:border_thickness)
 
@@ -138,21 +163,15 @@ module CyberarmEngine
       old_width = width
       old_height = height
 
-      _style = @style.send(event)
       @style_event = event
 
-      if @text.is_a?(CyberarmEngine::Text)
-        @text.color = _style&.dig(:color) || @style.default[:color]
-        @text.swap_font(_style&.dig(:text_size) || @style.default[:text_size], _style&.dig(:font) || @style.default[:font])
-      end
-
       return if self.is_a?(ToolTip)
 
       if old_width != width || old_height != height
-        (root&.gui_state || @gui_state).request_recalculate
+        root.gui_state.request_recalculate
-      else
-        stylize
       end
+
+      stylize
     end
 
     def default_events
@@ -238,41 +257,62 @@ module CyberarmEngine
       :handled
     end
 
+    def enabled=(boolean)
+      root.gui_state.request_repaint if @enabled != boolean
+
+      @enabled = boolean
+
+      recalculate
+
+      @enabled
+    end
+
     def enabled?
       @enabled
     end
 
+    def focused?
+      @focus
+    end
+
     def visible?
       @visible
     end
 
+    def element_visible?
+      @element_visible
+    end
+
     def toggle
       @visible = !@visible
       root.gui_state.request_recalculate
+      root.gui_state.request_repaint
     end
 
     def show
       bool = visible?
       @visible = true
       root.gui_state.request_recalculate unless bool
+      root.gui_state.request_repaint unless bool
     end
 
     def hide
       bool = visible?
       @visible = false
       root.gui_state.request_recalculate if bool
+      root.gui_state.request_repaint if bool
     end
 
     def draw
       return unless visible?
+      return unless element_visible?
 
       @style.background_canvas.draw
       @style.background_nine_slice_canvas.draw
+      @style.background_image_canvas.draw
       @style.border_canvas.draw
 
-      Gosu.clip_to(@x, @y, width, height) do
+      render
-        render
-      end
     end
 
     def debug_draw
@@ -370,32 +410,88 @@ module CyberarmEngine
     end
 
     def scroll_width
-      @children.sum(&:width) + noncontent_width
+      @children.sum(&:outer_width)
     end
 
     def scroll_height
-      @children.sum(&:height) + noncontent_height
+      if is_a?(CyberarmEngine::Element::Flow)
+        return 0 if @children.size.zero?
+
+        pairs_ = []
+        sorted_children_ = @children.sort_by(&:y)
+        a_ = []
+        y_position_ = sorted_children_.first.y
+
+        sorted_children_.each do |child|
+          unless child.y == y_position_
+            y_position_ = child.y
+            pairs_ << a_
+            a_ = []
+          end
+
+          a_ << child
+        end
+
+        pairs_ << a_ unless pairs_.last == a_
+
+        pairs_.sum { |pair|  + @style.padding_top + @style.border_thickness_top + pair.map(&:outer_height).max } + @style.padding_bottom + @style.border_thickness_bottom
+      else
+        @style.padding_top + @style.border_thickness_top + @children.sum(&:outer_height) + @style.padding_bottom + @style.border_thickness_bottom
+      end
     end
 
     def max_scroll_width
-      scroll_width - width
+      scroll_width - outer_width
     end
 
     def max_scroll_height
-      scroll_height - height
+      scroll_height - outer_height
     end
 
     def dimensional_size(size, dimension)
       raise "dimension must be either :width or :height" unless %i[width height].include?(dimension)
 
-      if size.is_a?(Numeric) && size.between?(0.0, 1.0)
+      new_size = if size.is_a?(Float) && size.between?(0.0, 1.0)
-        (@parent.send(:"content_#{dimension}") * size).round - send(:"noncontent_#{dimension}").round
+                   (@parent.send(:"content_#{dimension}") * size).floor - send(:"noncontent_#{dimension}").floor
+                 else
+                   size
+                 end
+
+      # Handle fill behavior
+      if @parent && @style.fill &&
+         (dimension == :width && @parent.is_a?(Flow) ||
+          dimension == :height && @parent.is_a?(Stack))
+        return space_available_width - noncontent_width if dimension == :width && @parent.is_a?(Flow)
+        return space_available_height - noncontent_height if dimension == :height && @parent.is_a?(Stack)
+
+      # Handle min_width/height and max_width/height
       else
-        size
+        return @style.send(:"min_#{dimension}") if @style.send(:"min_#{dimension}") && new_size.to_f < @style.send(:"min_#{dimension}")
+        return @style.send(:"max_#{dimension}") if @style.send(:"max_#{dimension}") && new_size.to_f > @style.send(:"max_#{dimension}")
       end
+
+      new_size
+    end
+
+    def space_available_width
+      # TODO: This may get expensive if there are a lot of children, probably should cache it somehow
+      fill_siblings = @parent.children.select { |c| c.style.fill }.count.to_f # include self since we're dividing
+
+      available_space = ((@parent.content_width - (@parent.children.reject { |c| c.style.fill }).map(&:outer_width).sum) / fill_siblings)
+      (available_space.nan? || available_space.infinite?) ? 0 : available_space.floor # The parent element might not have its dimensions, yet.
+    end
+
+    def space_available_height
+      # TODO: This may get expensive if there are a lot of children, probably should cache it somehow
+      fill_siblings = @parent.children.select { |c| c.style.fill }.count.to_f # include self since we're dividing
+
+      available_space = ((@parent.content_height - (@parent.children.reject { |c| c.style.fill }).map(&:outer_height).sum) / fill_siblings)
+      (available_space.nan? || available_space.infinite?) ? 0 : available_space.floor # The parent element might not have its dimensions, yet.
     end
 
     def background=(_background)
+      root.gui_state.request_repaint
+
       @style.background_canvas.background = _background
       update_background
     end
@@ -409,10 +505,13 @@ module CyberarmEngine
 
       @style.background_canvas.update
       update_background_nine_slice
+      update_background_image
       @style.border_canvas.update
     end
 
     def background_nine_slice=(_image_path)
+      root.gui_state.request_repaint
+
       @style.background_nine_slice_canvas.image = _image_path
       update_background_nine_slice
     end
@@ -436,6 +535,26 @@ module CyberarmEngine
       @style.background_nine_slice_canvas.image = @style.background_nine_slice
     end
 
+    def background_image=(image_path)
+      root.gui_state.request_repaint
+
+      @style.background_image = image_path.is_a?(Gosu::Image) ? image_path : get_image(image_path)
+      update_background_image
+    end
+
+    def update_background_image
+      @style.background_image_canvas.x = @x
+      @style.background_image_canvas.y = @y
+      @style.background_image_canvas.z = @z
+      @style.background_image_canvas.width = width
+      @style.background_image_canvas.height = height
+
+      @style.background_image_canvas.mode = @style.background_image_mode
+      @style.background_image_canvas.color = @style.background_image_color
+
+      @style.background_image_canvas.image = @style.background_image
+    end
+
     def root
       return self if is_root?
 

lib/cyberarm_engine/ui/elements/button.rb

@@ -64,8 +64,8 @@ module CyberarmEngine
             @scale_y = 1
           end
 
-          @width = _width || @image.width.round * @scale_x
+          @width = _width || @image.width.floor * @scale_x
-          @height = _height || @image.height.round * @scale_y
+          @height = _height || @image.height.floor * @scale_y
 
           update_background
         else
@@ -86,9 +86,12 @@ module CyberarmEngine
 
         old_width = width
         old_height = height
-        recalculate
 
-        root.gui_state.request_recalculate if old_width != width || old_height != height
+        if old_width != width || old_height != height
+          root.gui_state.request_recalculate
+        else
+          recalculate
+        end
 
         publish(:changed, self.value)
       end

lib/cyberarm_engine/ui/elements/container.rb

@@ -6,6 +6,16 @@ module CyberarmEngine
       attr_accessor :stroke_color, :fill_color
       attr_reader :children, :gui_state, :scroll_position
 
+      def self.current_container
+        @@current_container
+      end
+
+      def self.current_container=(container)
+        raise ArgumentError, "Expected container to an an instance of CyberarmEngine::Element::Container, got #{container.class}" unless container.is_a?(CyberarmEngine::Element::Container)
+
+        @@current_container = container
+      end
+
       def initialize(options = {}, block = nil)
         @gui_state = options.delete(:gui_state)
         super
@@ -32,32 +42,41 @@ module CyberarmEngine
         root.gui_state.request_recalculate
       end
 
+      def remove(element)
+        root.gui_state.request_recalculate if @children.delete(element)
+      end
+
       def clear(&block)
         @children.clear
 
-        old_container = $__current_container__
+        old_container = CyberarmEngine::Element::Container.current_container
 
-        $__current_container__ = self
+        CyberarmEngine::Element::Container.current_container = self
         block.call(self) if block
 
-        $__current_container__ = old_container
+        CyberarmEngine::Element::Container.current_container = old_container
 
         root.gui_state.request_recalculate
       end
 
-      def apend(&block)
+      def append(&block)
-        old_container = $__current_container__
+        old_container = CyberarmEngine::Element::Container.current_container
 
-        $__current_container__ = self
+        CyberarmEngine::Element::Container.current_container = self
         block.call(self) if block
 
-        $__current_container__ = old_container
+        CyberarmEngine::Element::Container.current_container = old_container
 
         root.gui_state.request_recalculate
       end
 
       def render
-        Gosu.clip_to(@x, @y, width, height) do
+        Gosu.clip_to(
+          @x + @style.border_thickness_left + @style.padding_left,
+          @y + @style.border_thickness_top + @style.padding_top,
+          content_width + 1,
+          content_height + 1
+        ) do
           @children.each(&:draw)
         end
       end
@@ -103,8 +122,13 @@ module CyberarmEngine
 
         stylize
 
+        # s = Gosu.milliseconds
+
         layout
 
+        old_width  = @width
+        old_height = @height
+
         if is_root?
           @width  = @style.width  = window.width
           @height = @style.height = window.height
@@ -115,11 +139,35 @@ module CyberarmEngine
           _width = dimensional_size(@style.width, :width)
           _height = dimensional_size(@style.height, :height)
 
-          @width  = _width  || (@children.map { |c| c.x + c.outer_width }.max || 0).round
+          @width  = _width  || (@children.map { |c| c.x + c.outer_width }.max || 0).floor
-          @height = _height || (@children.map { |c| c.y + c.outer_height }.max || 0).round
+          @height = _height || (@children.map { |c| c.y + c.outer_height }.max || 0).floor
         end
 
-        # Move child to parent after positioning
+        # FIXME: Correctly handle alignment when element has siblings
+        # FIXME: Enable alignment for any element, not just containers
+        if @style.v_align
+          space = space_available_height
+
+          case @style.v_align
+          when :center
+            @y = parent.height / 2 - height / 2
+          when :bottom
+            @y = parent.height - height
+          end
+        end
+
+        if @style.h_align
+          space = space_available_width
+
+          case @style.h_align
+          when :center
+            @x = parent.width / 2 - width / 2
+          when :right
+            @x = parent.width - width
+          end
+        end
+
+        # Move children to parent after positioning
         @children.each do |child|
           child.x += (@x + @style.border_thickness_left) - style.margin_left
           child.y += (@y + @style.border_thickness_top) - style.margin_top
@@ -129,9 +177,16 @@ module CyberarmEngine
           child.reposition # TODO: Implement top,bottom,left,center, and right positioning
 
           Stats.increment(:gui_recalculations_last_frame, 1)
+
+          child.element_visible = child.x >= @x - child.width && child.x <= @x + width &&
+                                  child.y >= @y - child.height && child.y <= @y + height
         end
 
+        # puts "TOOK: #{Gosu.milliseconds - s}ms to recalculate #{self.class}:0x#{self.object_id.to_s(16)}"
+
         update_background
+
+        root.gui_state.request_repaint if @width != old_width || @height != old_height
       end
 
       def layout
@@ -139,16 +194,17 @@ module CyberarmEngine
       end
 
       def max_width
-        _width = dimensional_size(@style.width, :width)
+        # _width = dimensional_size(@style.width, :width)
-        if _width
+        # if _width
-          outer_width
+        #   outer_width
-        else
+        # else
-          window.width - (@parent ? @parent.style.margin_right + @style.margin_right : @style.margin_right)
+        #   window.width - (@parent ? @parent.style.margin_right + @style.margin_right : @style.margin_right)
-        end
+        # end
+
+        outer_width
       end
 
       def fits_on_line?(element) # Flow
-        p [@options[:id], @width] if @options[:id]
         @current_position.x + element.outer_width <= max_width &&
           @current_position.x + element.outer_width <= window.width
       end
@@ -158,7 +214,6 @@ module CyberarmEngine
         element.y = element.style.margin_top  + @current_position.y
 
         @current_position.x += element.outer_width
-        @current_position.x = @style.margin_left if @current_position.x >= max_width
       end
 
       def tallest_neighbor(querier, _y_position) # Flow
@@ -171,14 +226,14 @@ module CyberarmEngine
         response
       end
 
-      def position_on_next_line(child) # Flow
+      def position_on_next_line(element) # Flow
-        @current_position.x = @style.margin_left
+        @current_position.x = @style.margin_left + @style.padding_left
-        @current_position.y += tallest_neighbor(child, @current_position.y).outer_height
+        @current_position.y += tallest_neighbor(element, @current_position.y).outer_height
 
-        child.x = child.style.margin_left + @current_position.x
+        element.x = element.style.margin_left + @current_position.x
-        child.y = child.style.margin_top  + @current_position.y
+        element.y = element.style.margin_top  + @current_position.y
 
-        @current_position.x += child.outer_width
+        @current_position.x += element.outer_width
       end
 
       def move_to_next_line(element) # Stack
@@ -194,7 +249,9 @@ module CyberarmEngine
         if @scroll_position.y < 0
           @scroll_position.y += @scroll_speed
           @scroll_position.y = 0 if @scroll_position.y > 0
-          recalculate
+
+          root.gui_state.request_recalculate_for(self)
+          root.gui_state.request_repaint
 
           return :handled
         end
@@ -208,7 +265,9 @@ module CyberarmEngine
         if @scroll_position.y.abs < max_scroll_height
           @scroll_position.y -= @scroll_speed
           @scroll_position.y = -max_scroll_height if @scroll_position.y.abs > max_scroll_height
-          recalculate
+
+          root.gui_state.request_recalculate_for(self)
+          root.gui_state.request_repaint
 
           return :handled
         end
@@ -230,7 +289,7 @@ module CyberarmEngine
       end
 
       def value
-        @children.map { |c| c.class }.join(", ")
+        @children.map(&:class).join(", ")
       end
 
       def to_s

lib/cyberarm_engine/ui/elements/edit_box.rb

@@ -98,7 +98,7 @@ module CyberarmEngine
       end
 
       def row_at(y)
-        ((y - @text.y) / @text.textobject.height).round
+        ((y - @text.y) / @text.textobject.height).floor
       end
 
       def column_at(x, y)

lib/cyberarm_engine/ui/elements/edit_line.rb

@@ -1,6 +1,20 @@
 module CyberarmEngine
   class Element
     class EditLine < Button
+      class TextInput < Gosu::TextInput
+        def filter=(filter)
+          @filter = filter
+        end
+
+        def filter(text_in)
+          if @filter
+            @filter.call(text_in)
+          else
+            text_in
+          end
+        end
+      end
+
       def initialize(text, options = {}, block = nil)
         @filter = options.delete(:filter)
         super(text, options, block)
@@ -14,17 +28,11 @@ module CyberarmEngine
         @caret_last_interval = Gosu.milliseconds
         @show_caret = true
 
-        @text_input = Gosu::TextInput.new
+        @text_input = TextInput.new
+        @text_input.filter = @filter
         @text_input.text = text
         @last_text_value = text
-
+        @last_caret_position = @text_input.caret_pos
-        if @filter && @filter.respond_to?(:call)
-          @text_input.instance_variable_set(:@filter, @filter)
-
-          def @text_input.filter(text_in)
-            @filter.call(text_in)
-          end
-        end
 
         @offset_x = 0
         @offset_y = 0
@@ -72,10 +80,22 @@ module CyberarmEngine
           @show_caret = true
           @caret_last_interval = Gosu.milliseconds
 
+          root.gui_state.request_repaint
+
           publish(:changed, value)
         end
 
+        if @last_caret_position != @text_input.caret_pos
+          @last_caret_position = @text_input.caret_pos
+          root.gui_state.request_repaint
+
+          @show_caret = true
+          @caret_last_interval = Gosu.milliseconds
+        end
+
         if Gosu.milliseconds >= @caret_last_interval + @caret_interval
+          root.gui_state.request_repaint
+
           @caret_last_interval = Gosu.milliseconds
 
           @show_caret = !@show_caret
@@ -98,20 +118,20 @@ module CyberarmEngine
             @text_input.caret_pos = @text_input.text.length
 
           when Gosu::KB_C
-            if @text_input.selection_start < @text_input.caret_pos
+            Gosu.clipboard = if @text_input.selection_start < @text_input.caret_pos
-              Clipboard.copy(@text_input.text[@text_input.selection_start...@text_input.caret_pos])
+                               @text_input.text[@text_input.selection_start...@text_input.caret_pos]
-            else
+                             else
-              Clipboard.copy(@text_input.text[@text_input.caret_pos...@text_input.selection_start])
+                               @text_input.text[@text_input.caret_pos...@text_input.selection_start]
-            end
+                             end
 
           when Gosu::KB_X
             chars = @text_input.text.chars
 
             if @text_input.selection_start < @text_input.caret_pos
-              Clipboard.copy(@text_input.text[@text_input.selection_start...@text_input.caret_pos])
+              Gosu.clipboard = @text_input.text[@text_input.selection_start...@text_input.caret_pos]
               chars.slice!(@text_input.selection_start, @text_input.caret_pos)
             else
-              Clipboard.copy(@text_input.text[@text_input.caret_pos...@text_input.selection_start])
+              Gosu.clipboard = @text_input.text[@text_input.caret_pos...@text_input.selection_start]
               chars.slice!(@text_input.caret_pos, @text_input.selection_start)
             end
 
@@ -119,10 +139,9 @@ module CyberarmEngine
 
           when Gosu::KB_V
             if instance_of?(EditLine) # EditLine assumes a single line of text
-              @text_input.text = @text_input.text.insert(@text_input.caret_pos,
+              @text_input.insert_text(Gosu.clipboard.gsub("\n", ""))
-                                                         Clipboard.paste.encode("UTF-8").gsub("\n", ""))
             else
-              @text_input.text = @text_input.text.insert(@text_input.caret_pos, Clipboard.paste.encode("UTF-8"))
+              @text_input.insert_text(Gosu.clipboard)
             end
           end
         end
@@ -180,7 +199,7 @@ module CyberarmEngine
         if @type == :password
           @text.x + @text.width(default(:password_character) * @text_input.text[0...@text_input.send(method)].length)
         else
-          @text.x + @text.width(@text_input.text[0...@text_input.send(method)])
+          @text.x + @text.width(@text_input.text[0...@text_input.send(method)]) - @style.border_thickness_left
         end
       end
 
@@ -197,20 +216,35 @@ module CyberarmEngine
       end
 
       def focus(sender)
-        super
+        @focus = true
-
         window.text_input = @text_input
         @text_input.caret_pos = @text_input.selection_start = @text_input.text.length
 
+        update_styles(:active)
+
         :handled
       end
 
       def enter(sender)
-        _has_focus = @focus
+        if @enabled && @focus
+          update_styles(:active)
+        elsif @enabled && !@focus
+          update_styles(:hover)
+        else
+          update_styles(:disabled)
+        end
 
-        super
+        :handled
+      end
 
-        @focus = _has_focus
+      def leave(sender)
+        if @enabled && @focus
+          update_styles(:active)
+        elsif @enabled && !@focus
+          update_styles
+        else
+          update_styles(:disabled)
+        end
 
         :handled
       end

lib/cyberarm_engine/ui/elements/image.rb

@@ -45,8 +45,8 @@ module CyberarmEngine
           @scale_y = 1
         end
 
-        @width = _width || @image.width.round * @scale_x
+        @width = _width || (@image.width * @scale_x).floor
-        @height = _height || @image.height.round * @scale_y
+        @height = _height || (@image.height * @scale_y).floor
 
         update_background
       end

lib/cyberarm_engine/ui/elements/list_box.rb

@@ -13,10 +13,12 @@ module CyberarmEngine
         @style.background_canvas.background = default(:background)
 
         # TODO: "Clean Up" into own class?
-        @menu = Stack.new(parent: parent, width: @options[:width], theme: @options[:theme])
+        @menu = Stack.new(parent: self, theme: @options[:theme])
         @menu.define_singleton_method(:recalculate_menu) do
           @x = @__list_box.x
           @y = @__list_box.y + @__list_box.height
+
+          @y = @__list_box.y - height if @y + height > window.height
         end
         @menu.instance_variable_set(:"@__list_box", self)
 
@@ -29,6 +31,13 @@ module CyberarmEngine
         self.choose = @choose
       end
 
+      def render
+        super
+
+        w = @text.textobject.text_width("▼")
+        @text.textobject.draw_text("▼", @x + content_width - w, @y + @style.padding_top, @z, 1, 1, @text.color)
+      end
+
       def choose=(item)
         valid = @items.detect { |i| i == item }
         raise "Invalid value '#{item}' for choose, valid options were: #{@items.map { |i| "#{i.inspect}" }.join(", ")}" unless valid
@@ -46,10 +55,20 @@ module CyberarmEngine
         :handled
       end
 
+      def clicked_left_mouse_button(_sender, _x, _y)
+        # @block&.call(self.value) if @enabled
+
+        :handled
+      end
+
       def show_menu
         @menu.clear
 
+        @menu.style.width = width
+
         @items.each do |item|
+          next if item == self.value
+
           btn = Button.new(
             item,
             {
@@ -61,7 +80,7 @@ module CyberarmEngine
             },
             proc do
               self.choose = item
-              @block&.call(item)
+              @block&.call(self.value)
             end
           )
 

lib/cyberarm_engine/ui/elements/progress.rb

@@ -1,9 +1,16 @@
 module CyberarmEngine
   class Element
     class Progress < Element
+      attr_reader :type
+
       def initialize(options = {}, block = nil)
         super(options, block)
 
+        @animation_speed = options[:animation_speed] || 3_000
+        @marquee_width = options[:marquee_width] || 0.25
+        @marquee_offset = 0
+        @marquee_animation_time = Gosu.milliseconds
+        @type = options[:type] || :linear
         @fraction_background = Background.new(background: @style.fraction_background)
         self.value = options[:fraction] || 0.0
       end
@@ -24,15 +31,46 @@ module CyberarmEngine
       def update_background
         super
 
-        @fraction_background.x = @style.border_thickness_left + @style.padding_left + @x
+        @fraction_background.x = (@style.border_thickness_left + @style.padding_left + @x) + @marquee_offset
         @fraction_background.y = @style.border_thickness_top + @style.padding_top + @y
         @fraction_background.z = @z
-        @fraction_background.width = @width * @fraction
+        @fraction_background.width = @width * (@type == :marquee ? @marquee_width : @fraction)
         @fraction_background.height = @height
 
         @fraction_background.background = @style.fraction_background
       end
 
+      def update
+        super
+
+        return unless @type == :marquee
+
+        marquee_width = @width * @marquee_width
+        range = @width + marquee_width
+
+        @marquee_offset = (@width * (Gosu.milliseconds - @marquee_animation_time) / @animation_speed) - marquee_width
+        @marquee_animation_time = Gosu.milliseconds if @marquee_offset > range
+
+        update_background
+        root.gui_state.request_repaint
+      end
+
+      def type=(type)
+        @type = type
+
+        case type
+        when :linear
+          @marquee_offset = 0
+        when :marquee
+          @marquee_offset = 0
+          @marquee_animation_time = Gosu.milliseconds
+        else
+          raise ArgumentError, "Only types :linear and :marquee are supported"
+        end
+
+        update_background
+      end
+
       def value
         @fraction
       end
@@ -40,9 +78,13 @@ module CyberarmEngine
       def value=(decimal)
         raise "value must be number" unless decimal.is_a?(Numeric)
 
+        old_value = @fraction
+
         @fraction = decimal.clamp(0.0, 1.0)
         update_background
 
+        root.gui_state.request_repaint if @fraction != old_value
+
         publish(:changed, @fraction)
         @fraction
       end

lib/cyberarm_engine/ui/elements/slider.rb

@@ -42,7 +42,7 @@ module CyberarmEngine
         @step_size = @options[:step] || 0.1
         @value     = @options[:value] || (@range.first + @range.last) / 2
 
-        @handle = Handle.new("", parent: self, width: 8, height: 1.0) { close }
+        @handle = Handle.new("", parent: self, theme: options[:theme], width: 8, height: 1.0) { close }
         add(@handle)
       end
 
@@ -61,10 +61,10 @@ module CyberarmEngine
       end
 
       def position_handle
-        @handle.x = @x + @style.padding_left + @style.border_thickness_left +
+        @handle.x = @x + @handle.style.margin_left + @style.padding_left + @style.border_thickness_left +
                     ((content_width - @handle.outer_width) * (@value - @range.min) / (@range.max - @range.min).to_f)
 
-        @handle.y = @y + @style.border_thickness_top + @style.padding_top
+        @handle.y = @y + @handle.style.margin_top + @style.border_thickness_top + @style.padding_top
       end
 
       def draw
@@ -97,6 +97,8 @@ module CyberarmEngine
         position_handle
         @handle.recalculate
 
+        root.gui_state.request_repaint
+
         publish(:changed, @value)
       end
     end

lib/cyberarm_engine/ui/elements/text_block.rb

@@ -7,6 +7,7 @@ module CyberarmEngine
         @text = Text.new(
           text, font: @options[:font], z: @z, color: @options[:color],
                 size: @options[:text_size], shadow: @options[:text_shadow],
+                static: @options[:text_static],
                 shadow_size: @options[:text_shadow_size],
                 shadow_color: @options[:text_shadow_color],
                 border: @options[:text_border],
@@ -18,7 +19,14 @@ module CyberarmEngine
       end
 
       def render
-        @text.draw
+        # Gosu.clip_to is too expensive to always use so check if we actually need it.
+        if @text.width > width || @text.height > height
+          Gosu.clip_to(@x, @y, width, height) do
+            @text.draw
+          end
+        else
+          @text.draw
+        end
       end
 
       def recalculate
@@ -28,6 +36,9 @@ module CyberarmEngine
           @text.color = @style.color
         end
 
+        old_width  = @width
+        old_height = @height
+
         @width  = 0
         @height = 0
 
@@ -36,19 +47,19 @@ module CyberarmEngine
 
         handle_text_wrapping(_width)
 
-        @width  = _width  || @text.width.round
+        @width  = _width  || @text.width.floor
-        @height = _height || @text.height.round
+        @height = _height || @text.height.floor
 
         @text.y = @style.border_thickness_top + @style.padding_top + @y
         @text.z = @z + 3
 
-        if (text_alignment = @options[:text_align])
+        if (text_alignment = @options[:text_align] || @options[:text_h_align])
           case text_alignment
           when :left
             @text.x = @style.border_thickness_left + @style.padding_left + @x
           when :center
-            @text.x = if @text.width <= outer_width
+            @text.x = if @text.width <= width
-                        @x + outer_width / 2 - @text.width / 2
+                        @x + width / 2 - @text.width / 2
                       else # Act as left aligned
                         @style.border_thickness_left + @style.padding_left + @x
                       end
@@ -57,50 +68,83 @@ module CyberarmEngine
           end
         end
 
+        if (vertical_alignment = @options[:text_v_align])
+          case vertical_alignment
+          when :center
+            @text.y = if @text.height <= height
+                        @y + height / 2 - @text.height / 2
+                      else
+                        @style.border_thickness_top + @style.padding_top + @y
+                      end
+          when :bottom
+            @text.y = @y + outer_height - (@text.height + @style.border_thickness_bottom + @style.padding_bottom)
+          end
+        end
+
         update_background
+
+        root.gui_state.request_repaint if @width != old_width || @height != old_height
       end
 
       def handle_text_wrapping(max_width)
-        max_width ||= @parent&.width
+        max_width ||= @parent&.content_width
         max_width ||= @x - (window.width + noncontent_width)
         wrap_behavior = style.text_wrap
         copy = @raw_text.to_s.dup
 
-        if line_width(copy[0]) <= max_width && line_width(copy) > max_width && wrap_behavior != :none
+        # Only perform text wrapping: if it is enabled, is possible to wrap, and text is too long to fit on one line
-          breaks = []
+        if wrap_behavior != :none && line_width(copy[0]) <= max_width && line_width(copy) > max_width
+          breaks = [] # list of indexes to insert a line break
           line_start = 0
-          line_end   = copy.length
+          line_end = copy.length
 
-          while line_start != copy.length
+          stalled = false
-            if line_width(copy[line_start...line_end]) > max_width
+          stalled_interations = 0
-              line_end = ((line_end - line_start) / 2.0)
+          max_stalled_iterations = 10
-              line_end = 1.0 if line_end <= 1
+          checked_copy_length = line_width(copy[line_start..line_end])
-            elsif line_end < copy.length && line_width(copy[line_start...line_end + 1]) < max_width
-              # To small, grow!
-              # TODO: find a more efficient way
-              line_end += 1
 
-            else # FOUND IT!
+          # find length of lines
-              entering_line_end = line_end.floor
+          while line_width(copy[line_start..line_end]) > max_width && stalled_interations < max_stalled_iterations
-              max_reach = line_end.floor - line_start < 63 ? line_end.floor - line_start : 63
+            search_start = line_start
-              reach = 0
+            search_end = line_end
 
-              if wrap_behavior == :word_wrap
+            # Perform a binary search to find length of line
-                max_reach.times do |i|
+            while search_start < search_end
-                  reach = i
+              midpoint = ((search_start.to_f + search_end) / 2.0).floor
-                  break if copy[line_end.floor - i].to_s.match(/[[:punct:]]| /)
+
+              if line_width(copy[line_start..midpoint]) > max_width
+                search_end = midpoint
+              else
+                search_start = midpoint + 1
+              end
+            end
+
+            if wrap_behavior == :word_wrap
+              word_search_end = search_end
+              failed = false
+
+              until(copy[word_search_end].to_s.match(/[[:punct:]]| /))
+                word_search_end -= 1
+
+                if word_search_end <= 1 || word_search_end < line_start
+                  failed = true
+                  break
                 end
-
-                # puts "Max width: #{max_width}/#{line_width(@raw_text)} Reach: {#{reach}/#{max_reach}} Line Start: #{line_start}/#{line_end.floor} (#{copy.length}|#{@raw_text.length}) [#{entering_line_end}] '#{copy}' {#{copy[line_start...line_end]}}"
-                line_end = line_end.floor - reach + 1 if reach != max_reach # Add +1 to walk in front of punctuation
               end
 
-              breaks << line_end.floor
+              line_start = failed ? search_end : word_search_end + 1 # walk in front of punctuation
-              line_start = line_end.floor
+            else
-              line_end = copy.length
+              line_start = search_end
-
-              break if entering_line_end == copy.length || reach == max_reach
             end
+
+            breaks << line_start
+
+            # Prevent locking up due to outer while loop text width < max_width check not being satisfied.
+            stalled = checked_copy_length == line_width(copy[line_start..line_end])
+            checked_copy_length = line_width(copy[line_start..line_end])
+
+            stalled_interations += 1 if stalled
+            stalled_interations = 0 unless stalled
           end
 
           breaks.each_with_index do |pos, index|
@@ -120,13 +164,19 @@ module CyberarmEngine
       end
 
       def value=(value)
+        old_value = @raw_text
         @raw_text = value.to_s.chomp
 
         old_width = width
         old_height = height
-        recalculate
 
-        root.gui_state.request_recalculate if old_width != width || old_height != height
+        if old_width != width || old_height != height
+          root.gui_state.request_recalculate
+        else
+          recalculate
+        end
+
+        root.gui_state.request_repaint if old_value != @raw_text
 
         publish(:changed, self.value)
       end

lib/cyberarm_engine/ui/elements/toggle_button.rb

@@ -5,7 +5,7 @@ module CyberarmEngine
 
       def initialize(options, block = nil)
         if options.dig(:theme, :ToggleButton, :checkmark_image)
-          options[:theme][:ToggleButton][:image_width] ||= options[:theme][:Label][:text_size]
+          options[:theme][:ToggleButton][:image_width] ||= options[:theme][:TextBlock][:text_size]
           super(get_image(options.dig(:theme, :ToggleButton, :checkmark_image)), options, block)
 
           @_image = @image

lib/cyberarm_engine/ui/gui_state.rb

@@ -12,7 +12,7 @@ module CyberarmEngine
 
       @root_container = Element::Stack.new(gui_state: self)
       @game_objects << @root_container
-      $__current_container__ = @root_container
+      CyberarmEngine::Element::Container.current_container = @root_container
 
       @active_width  = window.width
       @active_height = window.height
@@ -25,6 +25,9 @@ module CyberarmEngine
       @last_mouse_pos = nil
       @dragging_element = nil
       @pending_recalculate_request = false
+      @pending_element_recalculate_requests = []
+
+      @needs_repaint = false
 
       @menu = nil
       @min_drag_distance = 0
@@ -54,8 +57,9 @@ module CyberarmEngine
         @menu.draw
       end
 
-      if @tip.value.length.positive?
+      if @tip && @tip.value.length.positive?
         Gosu.flush
+
         @tip.draw
       end
 
@@ -64,6 +68,12 @@ module CyberarmEngine
 
         @root_container.debug_draw
       end
+
+      @needs_repaint = false
+    end
+
+    def needs_repaint?
+      @needs_repaint
     end
 
     def update
@@ -75,6 +85,9 @@ module CyberarmEngine
         @pending_recalculate_request = false
       end
 
+      @pending_element_recalculate_requests.each(&:recalculate)
+      @pending_element_recalculate_requests.clear
+
       if @pending_focus_request
         @pending_focus_request = false
 
@@ -83,8 +96,20 @@ module CyberarmEngine
       end
 
       @menu&.update
+
       super
 
+      if @active_width != window.width || @active_height != window.height
+        request_recalculate
+        @root_container.publish(:window_size_changed)
+      end
+
+      @active_width  = window.width
+      @active_height = window.height
+
+      return unless window.has_focus?
+      return unless window.current_state == self
+
       new_mouse_over = @menu.hit_element?(window.mouse_x, window.mouse_y) if @menu
       new_mouse_over ||= @root_container.hit_element?(window.mouse_x, window.mouse_y)
 
@@ -120,18 +145,6 @@ module CyberarmEngine
 
       @last_mouse_pos = Vector.new(window.mouse_x, window.mouse_y)
       @mouse_pos = @last_mouse_pos.clone
-
-      if @active_width != window.width || @active_height != window.height
-        request_recalculate
-        @root_container.publish(:window_size_changed)
-      end
-
-      @active_width  = window.width
-      @active_height = window.height
-    end
-
-    def tool_tip_delay
-      250 # ms
     end
 
     def button_down(id)
@@ -168,6 +181,13 @@ module CyberarmEngine
       end
 
       @focus.button_up(id) if @focus.respond_to?(:button_up)
+
+      # Prevents menu from popping back up if the listbox is clicked to hide it.
+      @hid_menu_for = nil
+    end
+
+    def tool_tip_delay
+      @tip.style.delay || 250 # ms
     end
 
     def redirect_mouse_button(button)
@@ -178,7 +198,7 @@ module CyberarmEngine
         @focus = nil
       end
 
-      if @mouse_over
+      if @mouse_over && @hid_menu_for != @mouse_over
         @mouse_down_position[button] = Vector.new(window.mouse_x, window.mouse_y)
         @mouse_down_on[button]       = @mouse_over
 
@@ -192,7 +212,7 @@ module CyberarmEngine
     def redirect_released_mouse_button(button)
       hide_menu if @menu && (@menu == @mouse_over) || (@mouse_over&.parent == @menu)
 
-      if @mouse_over
+      if @mouse_over && @hid_menu_for != @mouse_over
         @mouse_over.publish(:"released_#{button}_mouse_button", window.mouse_x, window.mouse_y)
         if @mouse_over == @mouse_down_on[button]
           @mouse_over.publish(:"clicked_#{button}_mouse_button", window.mouse_x,
@@ -231,16 +251,32 @@ module CyberarmEngine
       @pending_recalculate_request = true
     end
 
+    def request_recalculate_for(element)
+      # element is already queued
+      return if @pending_element_recalculate_requests.detect { |e| e == element }
+
+      @pending_element_recalculate_requests << element
+    end
+
     def request_focus(element)
       @pending_focus_request = true
       @pending_focus_element = element
     end
 
+    def request_repaint
+      # puts caller[0..4]
+      # puts
+      @needs_repaint = true
+    end
+
     def show_menu(list_box)
       @menu = list_box
     end
 
     def hide_menu
+      return unless @menu
+
+      @hid_menu_for = @menu.parent
       @menu = nil
     end
 

lib/cyberarm_engine/ui/theme.rb

@@ -76,6 +76,7 @@ module CyberarmEngine
         border_radius: 0,
         background: ["ffc75e61".to_i(16), "ffe26623".to_i(16)],
         text_align: :center,
+        text_v_align: :center,
         text_wrap: :none,
 
         hover: {
@@ -102,7 +103,12 @@ module CyberarmEngine
         caret_color: Gosu::Color::WHITE,
         caret_interval: 500,
         selection_color: Gosu::Color.rgba(255, 128, 50, 200),
-        text_align: :left
+        text_align: :left,
+        text_static: false # static text causes issues correctly displaying caret position
+      },
+
+      EditBox: { # < EditLine
+        text_v_align: :top
       },
 
       Image: { # < Element
@@ -154,6 +160,7 @@ module CyberarmEngine
       },
 
       ToolTip: { # < TextBlock
+        delay: 100, # ms
         color: Gosu::Color::WHITE,
         padding_top: 4,
         padding_bottom: 4,

lib/cyberarm_engine/version.rb

@@ -1,4 +1,4 @@
 module CyberarmEngine
   NAME    = "InDev".freeze
-  VERSION = "0.19.0".freeze
+  VERSION = "0.23.0".freeze
 end

lib/cyberarm_engine/window.rb

@@ -8,39 +8,53 @@ module CyberarmEngine
 
     attr_accessor :show_cursor
     attr_writer :exit_on_opengl_error
-    attr_reader :last_frame_time
+    attr_reader :last_frame_time, :states
 
     def self.now
       Gosu.milliseconds
     end
 
     def self.dt
-      $window.last_frame_time / 1000.0
+      instance.last_frame_time / 1000.0
+    end
+
+    def self.instance=(window)
+      raise ArgumentError, "Expected window to be a subclass of CyberarmEngine::Window, got: #{window.class}" unless window.is_a?(CyberarmEngine::Window)
+
+      @@instance = window
+    end
+
+    def self.instance
+      @@instance
     end
 
     def initialize(width: 800, height: 600, fullscreen: false, update_interval: 1000.0 / 60, resizable: false, borderless: false)
       @show_cursor = false
+      @has_focus = false
 
       super(width, height, fullscreen: fullscreen, update_interval: update_interval, resizable: resizable, borderless: borderless)
-      $window = self
+      Window.instance = self
+
       @last_frame_time = Gosu.milliseconds - 1
       @current_frame_time = Gosu.milliseconds
       self.caption = "CyberarmEngine #{CyberarmEngine::VERSION} #{Gosu.language}"
 
       @states = []
       @exit_on_opengl_error = false
+      preload_default_shaders if respond_to?(:preload_default_shaders)
 
       setup if defined?(setup)
     end
 
     def draw
-      current_state.draw if current_state
+      current_state&.draw
     end
 
     def update
       Stats.clear
 
-      current_state.update if current_state
+      current_state&.update
+
       @last_frame_time = Gosu.milliseconds - @current_frame_time
       @current_frame_time = Gosu.milliseconds
     end
@@ -49,6 +63,48 @@ module CyberarmEngine
       @show_cursor
     end
 
+    def needs_redraw?
+      current_state ? current_state.needs_redraw? : true
+    end
+
+    def drop(filename)
+      current_state&.drop(filename)
+    end
+
+    def gamepad_connected(index)
+      current_state&.gamepad_connected(index)
+    end
+
+    def gamepad_disconnected(index)
+      current_state&.gamepad_disconnected(index)
+    end
+
+    def gain_focus
+      @has_focus = true
+
+      current_state&.gain_focus
+    end
+
+    def lose_focus
+      @has_focus = false
+
+      current_state&.lose_focus
+    end
+
+    def button_down(id)
+      super
+      current_state&.button_down(id)
+    end
+
+    def button_up(id)
+      super
+      current_state&.button_up(id)
+    end
+
+    def close
+      current_state ? current_state.close : super
+    end
+
     def dt
       @last_frame_time / 1000.0
     end
@@ -61,16 +117,6 @@ module CyberarmEngine
       @exit_on_opengl_error
     end
 
-    def button_down(id)
-      super
-      current_state.button_down(id) if current_state
-    end
-
-    def button_up(id)
-      super
-      current_state.button_up(id) if current_state
-    end
-
     def push_state(klass, options = {})
       options = { setup: true }.merge(options)
 
@@ -94,18 +140,20 @@ module CyberarmEngine
       @states.last
     end
 
-    def previous_state
-      if @states.size > 1 && (state = @states[@states.size - 2])
-        state
-      end
-    end
-
     def pop_state
       @states.pop
+
+      current_state.request_repaint if current_state&.is_a?(GuiState)
     end
 
     def shift_state
       @states.shift
+
+      current_state.request_repaint if current_state&.is_a?(GuiState)
+    end
+
+    def has_focus?
+      @has_focus
     end
 
     # Sourced from https://gist.github.com/ippa/662583