Add the textures background scrolling example

examples/README.md

@@ -87,3 +87,11 @@ Examples using raylib shapes drawing functionality.
 | 41 | [shapes_easings_box_anim](shapes/shapes_easings_box_anim.rb)               | <img src="shapes/shapes_easings_box_anim.png" alt="shapes_easings_box_anim" width="80"> | ⭐️⭐️☆☆ | 2.5 | 2.5 | [Ray](https://github.com/raysan5) |
 | 42 | [shapes_easings_rectangle_array](shapes/shapes_easings_rectangle_array.rb) | <img src="shapes/shapes_easings_rectangle_array.png" alt="shapes_easings_rectangle_array" width="80"> | ⭐️⭐️⭐️☆ | 2.5 | 2.5 | [Ray](https://github.com/raysan5) |
 | 46 | [shapes_top_down_lights](shapes/shapes_top_down_lights.rb)                 | <img src="shapes/shapes_top_down_lights.png" alt="shapes_top_down_lights" width="80"> | ⭐️⭐️⭐️⭐️ | **4.2** | **4.2** | [Jeffery Myers](https://github.com/JeffM2501) |
+
+## Textures
+
+Examples using raylib textures functionality, including image/textures loading/generation and drawing.
+
+| ## | example                                                                    | image  | difficulty<br>level | version<br>created | last version<br>updated | original<br>developer |
+|----|----------------------------------------------------------------------------|--------|:-------------------:|:------------------:|:------------------:|:----------|
+| 58 | [textures_background_scrolling](textures/textures_background_scrolling.rb) | <img src="textures/textures_background_scrolling.png" alt="textures_background_scrolling" width="80"> | ⭐️☆☆☆ | 2.0 | 2.5 | [Ray](https://github.com/raysan5) |

examples/textures/textures_background_scrolling.rb

@@ -0,0 +1,85 @@
+# ******************************************************************************************
+# 
+#   raylib [textures] example - Background scrolling
+# 
+#   Example originally created with raylib 2.0, last time updated with raylib 2.5
+# 
+#   Example ported to Ruby by Wilson Silva (@wilsonsilva). Works with Raylib 4.5
+#
+#   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+#   BSD-like license that allows static linking with closed source software
+#
+#   Copyright (c) 2019-2023 Ramon Santamaria (@raysan5)
+#
+# ******************************************************************************************
+
+require 'bundler/setup'
+require 'raylib'
+
+# Initialization
+# --------------------------------------------------------------------------------------
+SCREEN_WIDTH = 800
+SCREEN_HEIGHT = 450
+
+Raylib.init_window(SCREEN_WIDTH, SCREEN_HEIGHT, 'raylib [textures] example - background scrolling')
+
+# NOTE: Be careful, background width must be equal or bigger than screen width
+# if not, texture should be draw more than two times for scrolling effect
+background = Raylib.load_texture(File.join(__dir__, 'resources/cyberpunk_street_background.png'))
+midground  = Raylib.load_texture(File.join(__dir__, 'resources/cyberpunk_street_midground.png'))
+foreground = Raylib.load_texture(File.join(__dir__, 'resources/cyberpunk_street_foreground.png'))
+
+scrolling_back = 0.0
+scrolling_mid = 0.0
+scrolling_fore = 0.0
+
+Raylib.set_target_fps(60) # Set our game to run at 60 frames-per-second
+# --------------------------------------------------------------------------------------
+
+# Main game loop
+until Raylib.window_should_close # Detect window close button or ESC key
+  # Update
+  # ----------------------------------------------------------------------------------
+  scrolling_back -= 0.1
+  scrolling_mid  -= 0.5
+  scrolling_fore -= 1.0
+
+  # NOTE: Texture is scaled twice its size, so it sould be considered on scrolling
+  scrolling_back = 0 if scrolling_back <= -background.width * 2
+  scrolling_mid  = 0 if scrolling_mid  <= -midground.width * 2
+  scrolling_fore = 0 if scrolling_fore <= -foreground.width * 2
+  # ----------------------------------------------------------------------------------
+
+  # Draw
+  # ----------------------------------------------------------------------------------
+  Raylib.begin_drawing
+  Raylib.clear_background(Raylib.get_color(0x052c46ff))
+
+  # Draw background image twice
+  # NOTE: Texture is scaled twice its size
+  Raylib.draw_texture_ex(background, Raylib::Vector2.create(scrolling_back, 20), 0.0, 2.0, Raylib::WHITE)
+  Raylib.draw_texture_ex(background, Raylib::Vector2.create(background.width * 2 + scrolling_back, 20), 0.0, 2.0, Raylib::WHITE)
+
+  # Draw midground image twice
+  Raylib.draw_texture_ex(midground, Raylib::Vector2.create(scrolling_mid, 20), 0.0, 2.0, Raylib::WHITE)
+  Raylib.draw_texture_ex(midground, Raylib::Vector2.create(midground.width * 2 + scrolling_mid, 20), 0.0, 2.0, Raylib::WHITE)
+
+  # Draw foreground image twice
+  Raylib.draw_texture_ex(foreground, Raylib::Vector2.create(scrolling_fore, 70), 0.0, 2.0, Raylib::WHITE)
+  Raylib.draw_texture_ex(foreground, Raylib::Vector2.create(foreground.width * 2 + scrolling_fore, 70), 0.0, 2.0, Raylib::WHITE)
+
+  Raylib.draw_text('BACKGROUND SCROLLING & PARALLAX', 10, 10, 20, Raylib::RED)
+  Raylib.draw_text('(c) Cyberpunk Street Environment by Luis Zuno (@ansimuz)', SCREEN_WIDTH - 330, SCREEN_HEIGHT - 20, 10, Raylib::RAYWHITE)
+
+  Raylib.end_drawing
+  # ----------------------------------------------------------------------------------
+end
+
+# De-Initialization
+# --------------------------------------------------------------------------------------
+Raylib.unload_texture(background) # Unload background texture
+Raylib.unload_texture(midground)  # Unload midground texture
+Raylib.unload_texture(foreground) # Unload foreground texture
+
+Raylib.close_window               # Close window and OpenGL context
+# --------------------------------------------------------------------------------------