Add textures raw data example

wilsonsilva · Oct 24, 2023 · a5df771 · a5df771
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diff --git a/examples/README.md b/examples/README.md
@@ -102,4 +102,5 @@ Examples using raylib textures functionality, including image/textures loading/g
 | 52 | [textures_image_processing](textures/textures_image_processing.rb)         | <img src="textures/textures_image_processing.png" alt="textures_image_processing" width="80"> | ⭐️⭐️⭐️☆ | 1.4 | 3.5 | [Ray](https://github.com/raysan5) |
 | 53 | [textures_image_text](textures/textures_image_text.rb)                     | <img src="textures/textures_image_text.png" alt="textures_image_text" width="80"> | ⭐️⭐️☆☆ | 1.8 | **4.0** | [Ray](https://github.com/raysan5) |
 | 54 | [textures_to_image](textures/textures_to_image.rb)                         | <img src="textures/textures_to_image.png" alt="textures_to_image" width="80"> | ⭐️☆☆☆ | 1.3 | **4.0** | [Ray](https://github.com/raysan5) |
+| 55 | [textures_raw_data](textures/textures_raw_data.rb)                         | <img src="textures/textures_raw_data.png" alt="textures_raw_data" width="80"> | ⭐️⭐️⭐️☆ | 1.3 | 3.5 | [Ray](https://github.com/raysan5) |
 | 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) |
diff --git a/examples/textures/resources/fudesumi.raw b/examples/textures/resources/fudesumi.raw
diff --git a/examples/textures/textures_raw_data.png b/examples/textures/textures_raw_data.png
diff --git a/examples/textures/textures_raw_data.rb b/examples/textures/textures_raw_data.rb
@@ -0,0 +1,87 @@
+# ******************************************************************************************
+#
+#   raylib [textures] example - Load textures from raw data
+#
+#   NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
+#
+#   Example originally created with raylib 1.3, last time updated with raylib 3.5
+#
+#   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) 2015-2023 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 - texture from raw data')
+
+# NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
+
+# Load RAW image data (512x512, 32bit RGBA, no file header)
+fudesumi_raw = Raylib.load_image_raw(File.join(__dir__, 'resources/fudesumi.raw'), 384, 512, Raylib::PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, 0)
+fudesumi = Raylib.load_texture_from_image(fudesumi_raw) # Upload CPU (RAM) image to GPU (VRAM)
+Raylib.unload_image(fudesumi_raw)
+
+# Generate a checked texture by code
+width = 960
+height = 480
+
+# Dynamic memory allocation to store pixels data (Color type)
+pixels_data = Array.new(width * height) do |i|
+  x, y = i % width, i / width
+  color = ((x/32 + y/32)/1) % 2 == 0 ? Raylib::ORANGE : Raylib::GOLD
+  [color.r, color.g, color.b, color.a]
+end.flatten
+
+# Convert the array to a pointer
+pixels = FFI::MemoryPointer.new(:uchar, width * height * 4)
+pixels.put_array_of_uchar(0, pixels_data)
+
+# Load pixels data into an image structure and create texture
+checked_im = Raylib::Image.create(
+  pixels, # We can assign pixels directly to data
+  width,
+  height,
+  1,
+  Raylib::PIXELFORMAT_UNCOMPRESSED_R8G8B8A8
+)
+checked = Raylib.load_texture_from_image(checked_im)
+Raylib.unload_image(checked_im) # Unload CPU (RAM) image data (pixels)
+# --------------------------------------------------------------------------------------
+
+# Main game loop
+until Raylib.window_should_close
+  # Draw
+  # ----------------------------------------------------------------------------------
+  Raylib.begin_drawing
+  Raylib.clear_background(Raylib::RAYWHITE)
+
+  Raylib.draw_texture(checked, SCREEN_WIDTH/2 - checked.width/2, SCREEN_HEIGHT/2 - checked.height/2, Raylib.fade(Raylib::WHITE, 0.5))
+  Raylib.draw_texture(fudesumi, 430, -30, Raylib::WHITE)
+
+  Raylib.draw_text('CHECKED TEXTURE ', 84, 85, 30, Raylib::BROWN)
+  Raylib.draw_text('GENERATED by CODE', 72, 148, 30, Raylib::BROWN)
+  Raylib.draw_text('and RAW IMAGE LOADING', 46, 210, 30, Raylib::BROWN)
+
+  Raylib.draw_text('(c) Fudesumi sprite by Eiden Marsal', 310, SCREEN_HEIGHT - 20, 10, Raylib::BROWN)
+
+  Raylib.end_drawing
+  # ----------------------------------------------------------------------------------
+end
+
+# De-Initialization
+# --------------------------------------------------------------------------------------
+Raylib.unload_texture(fudesumi) # Texture unloading
+Raylib.unload_texture(checked)  # Texture unloading
+Raylib.close_window # Close window and OpenGL context
+# --------------------------------------------------------------------------------------