As it is still in development, it may help you, LiteRGSS2 seems to be the fastest of the bunch for now

class SpriteGenerator
  DEFAULT_SPRITE_COUNT = 20_000
  SCREEN_WIDTH = 640
  SCREEN_HEIGHT = 480
  SPRITE_SIZE = 32

  def initialize
    @sprite_count = DEFAULT_SPRITE_COUNT
    @viewport = Viewport.new(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)
    @bitmap = nil
  end

  def run
    initialize_sprites
    loop do
      Graphics.update
    end
  rescue StandardError
    puts "\nEND\n"
  end

  private

  def initialize_sprites
    puts "Sprite Count: #{@sprite_count}"

    @sprites = @sprite_count.times.map do |i|
      initialize_bitmap if (i % 100).zero?
      initialize_sprite
    end
  end

  def initialize_bitmap
    @bitmap = Bitmap.new(320, 320)
    @bitmap.fill_rect(0, 0, 320, 320, random_color)
  end

  def initialize_sprite
    sprite = Sprite.new(@viewport)
    sprite.bitmap = @bitmap
    sprite.x = rand(SCREEN_WIDTH) - SPRITE_SIZE
    sprite.y = rand(SCREEN_HEIGHT) - SPRITE_SIZE
    set_sprite_src_rect(sprite)
    sprite
  end

  def set_sprite_src_rect(sprite)
    j = @sprite_count % 100
    sprite.src_rect.set(32 * (j / 10), 32 * (j % 10), SPRITE_SIZE, SPRITE_SIZE)
  end

  def random_color
    Color.new(rand(256), rand(256), rand(256), 32)
  end
end

SpriteGenerator.new.run

C++ SDL2

Most complete:
https://github.com/mkxp-z/mkxp-z
https://github.com/thehatkid/mkxp-z-android

Uses some fancy libraries:
https://github.com/gxm11/RGModern

C++ SFML

It is divided into LiteRGSS2 and LiteCGSS:
https://gitlab.com/pokemonsdk/litergss2
https://gitlab.com/NuriYuri/litecgss

https://github.com/Scorbutics/litergss-android

Unmaintained below

C

https://github.com/qnighy/tapir

Java libgdx

https://github.com/CameraBroke/JRGSS/tree/glrw

Ruby SDL

https://github.com/zh99998/OpenRGSS
https://github.com/zh99998/OpenRGSS-RPGMaker

It's better to add a few, otherwise people won't know how to build it, a workflow to build it is also an option

Make third_party be git submodules so we can clone them with the project:
git clone --recurse-submodules https://github.com/Admenri/rguplayer

GitBook: https://git-scm.com/book/en/v2/Git-Tools-Submodules

RGD has this cool thing where you can apply shaders to Graphic/Sprites/Viewports, it would be really cool to see something like that here

After reviewing common extensions to the Bitmap class, it's evident that shapes such as lines, circles, triangles, polygons, isogons, and ellipses are frequently added. As RGU already includes a Geometry class, extending it to handle common geometry shapes beyond just triangles seems beneficial.

• Line
• Circle
• Polygon
• Isogon
• Ellipse

Someone dumped the MZ corescripts for 1.8.0 on github a few weeks ago, it might be a good learning resource, especially since Tilemap works the same way as VXA
https://github.com/leandiez/rmmz-corescript-dev/tree/master/src/rmmz_core

Properties

• Graphics.fullscreen

  • Check if it is in fullscreen with Graphics.fullscreen and toggle it to true or false with Graphics.fullscreen=.

• Graphics.scale

  • Scaling feature allowing users to adjust the game window/screen size dynamically with Graphics.scale= such as scaling it by 2x or 0.5x.

• Graphics.vsync

  • Toogle it to true or false with Graphics.vsync=.

Methods

• Graphics.capture_screen

  • Capture in-game screenshots, enabling sharing of memorable moments or troubleshooting assistance through visual representation.

• Graphics.delta_time

  • Graphics.delta_time is exceptionally useful for modifying your game to stop synchronizing with the frame rate, ensuring consistent gameplay regardless of variations in frame rate.

• Graphics.shader

  • Applying global shaders that will affect all Viewports/Sprites such as xBRZ, scalefx, GameBoy Color...

It appears that it is unable to detect the .so related to Angle (tested putting it in ANGLE/amd64, ANGLE/i32 and in the root folder), i was trying to test running Angle with Vulkan on Linux

It seems like everything related to Audio/Input is not in the repository?

I'm tired of using XCode for Mac builds... as it's still in development you could aim for Zig cross compiler
https://medium.com/@edlyuu/zig-c-c-compiler-wtf-is-zig-c-790d9ad8d85b