Groogy

class Page
  # ....
  private def render_glyph_to_texture(glyph, width, height) : Nil
    bitmap = @face.value.glyph.value.bitmap  
    buffer = Bytes.new bitmap.buffer, bitmap.width * bitmap.rows
    show_pixels bitmap.buffer, bitmap.width, bitmap.rows
    @texture.update(bitmap.buffer, bitmap.width, bitmap.rows, 0, 0, 8)
  end

  def show_pixels(pixels, width, height)

Groogy

require "boleite"
require "./ego/*"
require "./ego/serializers/*"

app = EgoApplication.new # Inherits from Boleite::Application, defines how to get the configuration
app.state_stack.push GameState.new(app)
app.run

Groogy

require "crystal-clear"

class FooBar
  invariants do
    @val != nil
  end

  def initialize(@val = nil)
    @val = 5
  end

Groogy

alias Vector4f32 = Boleite::Vector4f32
alias Vector2f32 = Boleite::Vector2f32

struct SimpleVertex < Boleite::Vertex
  @pos   = Vector4f32.zero
  @color = Vector4f32.zero
  @uv    = Vector2f32.zero

  def initialize
  end

Groogy

if LibGLFW3.init != 0
error_callback = ->(error : Int32, description : Int8*) {
  puts "Error #{error}: #{String.new(description.as(UInt8*))}"
}
LibGLFW3.setErrorCallback(error_callback)

LibGLFW3.windowHint(LibGLFW3::OPENGL_PROFILE, LibGLFW3::OPENGL_CORE_PROFILE)
LibGLFW3.windowHint(LibGLFW3::OPENGL_FORWARD_COMPAT, 1)
LibGLFW3.windowHint(LibGLFW3::CONTEXT_VERSION_MAJOR, 4)
LibGLFW3.windowHint(LibGLFW3::CONTEXT_VERSION_MINOR, 2)

Groogy

if LibGLFW3.init != 0
error_callback = ->(error : Int32, description : Int8*) {
  puts "Error #{error}: #{String.new(description.as(UInt8*))}"
}
LibGLFW3.setErrorCallback(error_callback)

LibGLFW3.windowHint(LibGLFW3::OPENGL_PROFILE, LibGLFW3::OPENGL_CORE_PROFILE)
LibGLFW3.windowHint(LibGLFW3::OPENGL_FORWARD_COMPAT, 1)
LibGLFW3.windowHint(LibGLFW3::CONTEXT_VERSION_MAJOR, 4)
LibGLFW3.windowHint(LibGLFW3::CONTEXT_VERSION_MINOR, 2)

Groogy

abstract class Glue
  abstract def interested?(input) : Bool
  abstract def execute(input) : Nil
end

class GlueImp(T, P) < Glue
  def initialize(@bar : T, @callback : P)
  end
  
  def interested?(input) : Bool

Groogy

receiver = Boleite::InputReceiver.new
receiver.action_table << Boleite::DefaultAction.new :close
receiver.action_table << Boleite::MoveCameraAction.new :player_camera
receiver.register :close, ->() { puts "Closing!" }
receiver.register :player_camera, ->(x : Float64, y : Float64) { puts "Moving camera!" }

receiver.process Boleite::ClosedEvent.new
receiver.process Boleite::MouseMovedEvent.new(some_x, some_y)

Groogy

# Binding code
type Monitor = Void*
type Window  = Void*
type Cursor  = Void*


# My code
module Boleite
  # Forward declaration
  class RenderTarget

Groogy

module Boleite
  abstract struct Configuration
  end

  abstract class Application
    getter :configuration

    @configuration : Configuration

    def initialize()