Add textures bunnymark example

Author: wilsonsilva

examples/README.md

@@ -84,6 +84,7 @@ Examples using raylib textures functionality, including image/textures loading/g
 | 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) |
 | 59 | [textures_sprite_anim](textures/textures_sprite_anim.rb)                   | <img src="textures/textures_sprite_anim.png" alt="textures_sprite_anim" width="80"> | ⭐️⭐️☆☆ | 1.3 | 1.3 | [Ray](https://github.com/raysan5) |
 | 61 | [textures_sprite_explosion](textures/textures_sprite_explosion.rb)         | <img src="textures/textures_sprite_explosion.png" alt="textures_sprite_explosion" width="80"> | ⭐️⭐️☆☆ | 2.5 | 3.5 | [Ray](https://github.com/raysan5) |
+| 62 | [textures_abunnymark](textures/textures_bunnymark.rb)                      | <img src="textures/textures_bunnymark.png" alt="textures_bunnymark" width="80"> | ⭐️⭐️⭐️☆ | 1.6 | 2.5 | [Ray](https://github.com/raysan5) |
 
 ## Text
 

examples/textures/resources/wabbit_alpha.png

@@ -0,0 +1,131 @@
+# ******************************************************************************************
+#
+#   raylib [textures] example - Bunnymark
+#
+#   Example originally created with raylib 1.6, 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) 2014-2023 Ramon Santamaria (@raysan5)
+#
+# ******************************************************************************************
+
+require 'bundler/setup'
+require 'raylib'
+
+# Particle structure with basic data
+class Bunny < FFI::Struct
+  layout :position, Raylib::Vector2,
+         :speed, Raylib::Vector2,
+         :color, Raylib::Color
+
+  def position = self[:position]
+  def position=(new_position) self[:position] = new_position end
+  def speed = self[:speed]
+  def speed=(new_speed) self[:speed] = new_speed end
+  def color = self[:color]
+  def color=(new_color) self[:color] = new_color end
+
+  def self.create(position, speed, color)
+    new.tap do |instance|
+      instance.position = position
+      instance.speed = speed
+      instance.color = color
+    end
+  end
+end
+
+# Initialization
+# --------------------------------------------------------------------------------------
+SCREEN_WIDTH = 800
+SCREEN_HEIGHT = 450
+
+Raylib.init_window(SCREEN_WIDTH, SCREEN_HEIGHT, 'raylib [textures] example - bunnymark')
+
+MAX_BUNNIES = 50_000
+MAX_BATCH_ELEMENTS = 8192
+
+tex_bunny = Raylib.load_texture(File.join(__dir__, 'resources/wabbit_alpha.png'))
+
+bunnies = []
+bunnies_count = 0
+
+Raylib.set_target_fps(60)
+# --------------------------------------------------------------------------------------
+
+# Main game loop
+until Raylib.window_should_close # Detect window close button or ESC key
+  # Update
+  # ----------------------------------------------------------------------------------
+  if Raylib.is_mouse_button_down(Raylib::MOUSE_BUTTON_LEFT)
+    # Create more bunnies
+    100.times do
+      next unless bunnies_count < MAX_BUNNIES
+
+      position = Raylib.get_mouse_position
+
+      speed = Raylib::Vector2.create(
+        Raylib.get_random_value(-250, 250) / 60.0,
+        Raylib.get_random_value(-250, 250) / 60.0
+      )
+
+      color = Raylib::Color.create(
+        Raylib.get_random_value(50, 240),
+        Raylib.get_random_value(80, 240),
+        Raylib.get_random_value(100, 240),
+        255
+      )
+      bunnies << Bunny.create(position, speed, color)
+      bunnies_count += 1
+    end
+  end
+
+  # Update bunnies
+  bunnies.each do |bunny|
+    bunny.position.x += bunny.speed.x
+    bunny.position.y += bunny.speed.y
+
+    if (bunny.position.x + (tex_bunny.width / 2) > Raylib.get_screen_width) ||
+       (bunny.position.x + (tex_bunny.width / 2)).negative?
+      bunny.speed.x *= -1
+    end
+
+    if (bunny.position.y + (tex_bunny.height / 2) > Raylib.get_screen_height) ||
+       (bunny.position.y + (tex_bunny.height / 2) - 40).negative?
+      bunny.speed.y *= -1
+    end
+  end
+  # ----------------------------------------------------------------------------------
+
+  # Draw
+  # ----------------------------------------------------------------------------------
+  Raylib.begin_drawing
+  Raylib.clear_background(Raylib::RAYWHITE)
+
+  bunnies.each do |bunny|
+    # NOTE: When internal batch buffer limit is reached (MAX_BATCH_ELEMENTS),
+    # a draw call is launched and buffer starts being filled again;
+    # before issuing a draw call, updated vertex data from internal CPU buffer is send to GPU...
+    # Process of sending data is costly and it could happen that GPU data has not been completely
+    # processed for drawing while new data is tried to be sent (updating current in-use buffers)
+    # it could generates a stall and consequently a frame drop, limiting the number of drawn bunnies
+    Raylib.draw_texture(tex_bunny, bunny.position.x.to_i, bunny.position.y.to_i, bunny.color)
+  end
+
+  Raylib.draw_rectangle(0, 0, SCREEN_WIDTH, 40, Raylib::BLACK)
+  Raylib.draw_text(Raylib.text_format('bunnies: %i', :int, bunnies_count), 120, 10, 20, Raylib::GREEN)
+  Raylib.draw_text(Raylib.text_format('batched draw calls: %i', :int, 1 + (bunnies_count / MAX_BATCH_ELEMENTS)), 320, 10, 20, Raylib::MAROON)
+
+  Raylib.draw_fps(10, 10)
+  Raylib.end_drawing
+  # ----------------------------------------------------------------------------------
+end
+
+# De-Initialization
+# --------------------------------------------------------------------------------------
+Raylib.unload_texture(tex_bunny) # Unload bunny texture
+Raylib.close_window              # Close window and OpenGL context
+# --------------------------------------------------------------------------------------