Class: Hokusai::Backends::RaylibBackend

Inherits:
Object
  • Object
show all
Defined in:
ui/src/hokusai/backends/raylib.rb,
ui/src/hokusai/backends/raylib/font.rb,
ui/src/hokusai/backends/raylib/keys.rb

Defined Under Namespace

Classes: Config, ConfigError, DataForCb, Font

Constant Summary collapse

RAYLIB_PATH = 
ENV["RAYLIB_PATH"] || "#{__dir__}/../../../../vendor/lib"
OnWidthCb = 
Proc.new do |char, ffi_pointer|
  data = DataForCb.new ffi_pointer

  Raylib.MeasureTextEx(data[:raw], "#{char.chr}", data[:size], data[:spacing]).x + 1.565#@ data[:spacing]
end
Keys = 
[
[:null, Raylib::KEY_NULL],
[:left_shift, Raylib::KEY_LEFT_SHIFT],
[:left_control, Raylib::KEY_LEFT_CONTROL],
[:left_alt, Raylib::KEY_LEFT_ALT],
[:left_super, Raylib::KEY_LEFT_SUPER],
[:right_shift, Raylib::KEY_RIGHT_SHIFT],
[:right_control, Raylib::KEY_RIGHT_CONTROL],
[:right_alt, Raylib::KEY_RIGHT_ALT],
[:right_super, Raylib::KEY_RIGHT_SUPER],
[:apostrophe, Raylib::KEY_APOSTROPHE],
[:comma, Raylib::KEY_COMMA],
[:minus, Raylib::KEY_MINUS],
[:period, Raylib::KEY_PERIOD],
[:slash, Raylib::KEY_SLASH],
[:zero, Raylib::KEY_ZERO],
[:one, Raylib::KEY_ONE],
[:two, Raylib::KEY_TWO],
[:three, Raylib::KEY_THREE],
[:four, Raylib::KEY_FOUR],
[:five, Raylib::KEY_FIVE],
[:six, Raylib::KEY_SIX],
[:seven, Raylib::KEY_SEVEN],
[:eight, Raylib::KEY_EIGHT],
[:nine, Raylib::KEY_NINE],
[:semicolon, Raylib::KEY_SEMICOLON],
[:equal, Raylib::KEY_EQUAL],
[:a, Raylib::KEY_A],
[:b, Raylib::KEY_B],
[:c, Raylib::KEY_C],
[:d, Raylib::KEY_D],
[:e, Raylib::KEY_E],
[:f, Raylib::KEY_F],
[:g, Raylib::KEY_G],
[:h, Raylib::KEY_H],
[:i, Raylib::KEY_I],
[:j, Raylib::KEY_J],
[:k, Raylib::KEY_K],
[:l, Raylib::KEY_L],
[:m, Raylib::KEY_M],
[:n, Raylib::KEY_N],
[:o, Raylib::KEY_O],
[:p, Raylib::KEY_P],
[:q, Raylib::KEY_Q],
[:r, Raylib::KEY_R],
[:s, Raylib::KEY_S],
[:t, Raylib::KEY_T],
[:u, Raylib::KEY_U],
[:v, Raylib::KEY_V],
[:w, Raylib::KEY_W],
[:x, Raylib::KEY_X],
[:y, Raylib::KEY_Y],
[:z, Raylib::KEY_Z],
[:left_bracket, Raylib::KEY_LEFT_BRACKET],
[:backslash, Raylib::KEY_BACKSLASH],
[:right_bracket, Raylib::KEY_RIGHT_BRACKET],
[:grave, Raylib::KEY_GRAVE],
[:space, Raylib::KEY_SPACE],
[:escape, Raylib::KEY_ESCAPE],
[:enter, Raylib::KEY_ENTER],
[:tab, Raylib::KEY_TAB],
[:backspace, Raylib::KEY_BACKSPACE],
[:insert, Raylib::KEY_INSERT],
[:delete, Raylib::KEY_DELETE],
[:right, Raylib::KEY_RIGHT],
[:left, Raylib::KEY_LEFT],
[:down, Raylib::KEY_DOWN],
[:up, Raylib::KEY_UP],
[:page_up, Raylib::KEY_PAGE_UP],
[:page_down, Raylib::KEY_PAGE_DOWN],
[:home, Raylib::KEY_HOME],
[:end, Raylib::KEY_END],
[:caps_lock, Raylib::KEY_CAPS_LOCK],
[:scroll_lock, Raylib::KEY_SCROLL_LOCK],
[:num_lock, Raylib::KEY_NUM_LOCK],
[:print_screen, Raylib::KEY_PRINT_SCREEN],
[:pause, Raylib::KEY_PAUSE],
[:f1, Raylib::KEY_F1],
[:f2, Raylib::KEY_F2],
[:f3, Raylib::KEY_F3],
[:f4, Raylib::KEY_F4],
[:f5, Raylib::KEY_F5],
[:f6, Raylib::KEY_F6],
[:f7, Raylib::KEY_F7],
[:f8, Raylib::KEY_F8],
[:f9, Raylib::KEY_F9],
[:f10, Raylib::KEY_F10],
[:f11, Raylib::KEY_F11],
[:f12, Raylib::KEY_F12],
[:left_shift, Raylib::KEY_LEFT_SHIFT],
[:left_control, Raylib::KEY_LEFT_CONTROL],
[:left_alt, Raylib::KEY_LEFT_ALT],
[:left_super, Raylib::KEY_LEFT_SUPER],
[:right_shift, Raylib::KEY_RIGHT_SHIFT],
[:right_control, Raylib::KEY_RIGHT_CONTROL],
[:right_alt, Raylib::KEY_RIGHT_ALT],
[:right_super, Raylib::KEY_RIGHT_SUPER],
[:kb_menu, Raylib::KEY_KB_MENU],
[:kp_0, Raylib::KEY_KP_0],
[:kp_1, Raylib::KEY_KP_1],
[:kp_2, Raylib::KEY_KP_2],
[:kp_3, Raylib::KEY_KP_3],
[:kp_4, Raylib::KEY_KP_4],
[:kp_5, Raylib::KEY_KP_5],
[:kp_6, Raylib::KEY_KP_6],
[:kp_7, Raylib::KEY_KP_7],
[:kp_8, Raylib::KEY_KP_8],
[:kp_9, Raylib::KEY_KP_9],
[:kp_decimal, Raylib::KEY_KP_DECIMAL],
[:kp_divide, Raylib::KEY_KP_DIVIDE],
[:kp_multiply, Raylib::KEY_KP_MULTIPLY],
[:kp_subtract, Raylib::KEY_KP_SUBTRACT],
[:kp_add, Raylib::KEY_KP_ADD],
[:kp_enter, Raylib::KEY_KP_ENTER],
[:kp_equal, Raylib::KEY_KP_EQUAL],
[:back, Raylib::KEY_BACK],
[:menu, Raylib::KEY_MENU],
[:volume_up, Raylib::KEY_VOLUME_UP],
[:volume_down, Raylib::KEY_VOLUME_DOWN]]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize {|config| ... } ⇒ RaylibBackend

Returns a new instance of RaylibBackend.

Yields:



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# File 'ui/src/hokusai/backends/raylib.rb', line 34

def initialize
  @config = Config.new

  yield(config)
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'ui/src/hokusai/backends/raylib.rb', line 10

def config
  @config
end

Class Method Details

.icons ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 12

def self.icons
  @icons ||= {}
end

.images ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 16

def self.images
  @images ||= {}
end

.reset ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 30

def self.reset
  @stop = false
end

.run(app) ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 128

def self.run(app)
  backend = new do |config|
    yield config
  end

  block = app.mount
  backend.run(block)
end

.stop! ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 26

def self.stop!
  @stop = true
end

.stopped? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ui/src/hokusai/backends/raylib.rb', line 20

def self.stopped?
  @stop = false if @stop.nil?

  @stop
end

Instance Method Details

#color(hc) ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 61

def color(hc)
  if @raylib_color.nil?
    @raylib_color = Raylib::Color.from_u8(hc.red, hc.green, hc.blue, hc.alpha)
  else
    @raylib_color[:r] = hc.red
    @raylib_color[:g] = hc.green
    @raylib_color[:b] = hc.blue
    @raylib_color[:a] = hc.alpha
  end

  @raylib_color
end

#hml_vec2(x, y) ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 50

def hml_vec2(x, y)
  if @hml_vec2.nil?
    @hml_vec2 = LibHokusai::HmlVec2.create(x, y)
  else
    @hml_vec2[:x] = x
    @hml_vec2[:y] = y
  end

  @hml_vec2
end

#inside_scissor(x, y, h = 0) ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 252

def inside_scissor(x, y, h = 0)
  return true if @scissor.nil?

  val = y + h >= @scissor[1] && y <= @scissor[1] + @scissor[3]
  val
end

#mouse_button(clicked: false, down: false, released: false, up: false) ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 87

def mouse_button(clicked: false, down: false, released: false, up: false)
  if @mouse_button.nil?
    @mouse_button = LibHokusai::HmlInputMouseButton.create(clicked: clicked, down: down, released: released, up: up)
  else
    @mouse_button[:clicked] = clicked
    @mouse_button[:down] = down
    @mouse_button[:released] = released
    @mouse_button[:up] = up
  end

  @mouse_button
end

#process_input(input) ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 100

def process_input(input)
  raylib_mouse_pos = Raylib.GetMousePosition
  raylib_mouse_delta = Raylib.GetMouseDelta
  LibHokusai.hoku_input_mouse_set_scroll(input.raw, Raylib.GetMouseWheelMove)
  LibHokusai.hoku_input_set_mouse_position(input.raw, hml_vec2(raylib_mouse_pos.x, raylib_mouse_pos.y))

  input.raw[:mouse][:delta][:x] = raylib_mouse_delta.x
  input.raw[:mouse][:delta][:y] = raylib_mouse_delta.y

  [0,1,2].each do |button_id|
    clicked = Raylib.IsMouseButtonPressed(button_id)
    down = Raylib.IsMouseButtonDown(button_id)
    released = Raylib.IsMouseButtonReleased(button_id)
    up = Raylib.IsMouseButtonUp(button_id)

    button = mouse_button(clicked: clicked, down: down, released: released, up: up)
    LibHokusai.hoku_input_mouse_set_button(input.raw, button, button_id)
  end

  LibHokusai.hoku_input_keyboard_start(input.raw)

  Keys.each do |(hoku_key, raylib_key)|
    LibHokusai.hoku_input_keyboard_set_key(input.raw, hoku_key, Raylib.IsKeyDown(raylib_key))
  end

  LibHokusai.hoku_input_keyboard_stop(input.raw)
end

#rect(arr) ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 74

def rect(arr)
 if @raylib_rect.nil?
   @raylib_rect = Raylib::Rectangle.create(arr[0], arr[1], arr[2], arr[3])
 else
   @raylib_rect[:x] = arr[0]
   @raylib_rect[:y] = arr[1]
   @raylib_rect[:width] = arr[2]
   @raylib_rect[:height] = arr[3]
 end

 @raylib_rect
end

#register_command_handlers ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 259

def register_command_handlers
  Hokusai.on_close_window do
    self.class.stop!
  end

  Hokusai.on_set_mouse_cursor do |type|
    raylib_type = {
      default: Raylib::MOUSE_CURSOR_DEFAULT,
      arrow: Raylib::MOUSE_CURSOR_ARROW,
      ibeam: Raylib::MOUSE_CURSOR_IBEAM,
      crosshair: Raylib::MOUSE_CURSOR_CROSSHAIR,
      pointer: Raylib::MOUSE_CURSOR_POINTING_HAND,
    }[type]

    raise Hokusai::Error.new("Cursor #{type} not recognized") if raylib_type.nil?

    Raylib::SetMouseCursor(raylib_type)
  end

  Hokusai.on_set_mouse_position do |mouse|
    Raylib.SetMousePosition(mouse.pos.x, mouse.pos.y)
  end

  Hokusai.on_set_window_position do |(dx, dy)|
    wpos = Raylib.GetWindowPosition

    Raylib.SetWindowPosition(wpos.x + dx, wpos.y + dy)
  end

  Hokusai.on_restore_window do
    Raylib.RestoreWindow
  end

  Hokusai.on_maximize_window do
    if Raylib.IsWindowMaximized
      Raylib.RestoreWindow
    else
      Raylib.MaximizeWindow
    end
  end

  Hokusai.on_minimize_window do
    Raylib.MinimizeWindow
  end

  Hokusai.on_renderable do |canvas|
    inside_scissor(canvas.x, canvas.y, canvas.height)
  end

  Hokusai::Commands::ScissorBegin.on_draw do |command|
    Raylib.BeginScissorMode(command.x, command.y, command.width, command.height)
    @scissor = [command.x, command.y, command.width, command.height]
  end

  Hokusai::Commands::ScissorEnd.on_draw do |_|
    Raylib.EndScissorMode
    @scissor = nil
  end

  Hokusai::Commands::Circle.on_draw do |command|
    next unless inside_scissor(command.x, command.y)

    radius = command.radius - command.outline
    rc = command.color
    color = Raylib::Color.from_u8(rc.r, rc.g, rc.b, rc.a)
    Raylib.DrawCircleV(vec2(command.x, command.y), radius, color)

    if command.outline > 0
      Raylib.DrawCircleLines(command.x.ceil.to_i, command.y.ceil.to_i, command.radius, color(command.color))
    end
  end

  Hokusai::Commands::SVG.on_draw do |command|
    command = command.as(Hokusai::Commands::SVG)
    texture = begin
                if self.class.images[command.source]
                  self.class.images[command.source]
                else
                  img = Raylib.LoadImageSVG(command.source, command.width, command.height)
                  texture = Raylib.load_texture_from_image(img)
                  Raylib.UnloadImage(img)
                  self.class.images[command.source] = texture
                  Raylib.GenTextureMipmaps(texture)
                  texture
                end
              end

    Raylib.DrawTexture(texture, command.x, command.y, color(command.color))
  end

  Hokusai::Commands::Image.on_draw do |command|
    next unless inside_scissor(command.x, command.y, command.height)

    texture = begin
                if self.class.images[command.cache]
                  self.class.images[command.cache]
                else
                  img = Raylib.LoadImage(command.source)
                  Raylib.ImageResize(img.to_ptr, command.width, command.height)

                  texture = Raylib.LoadTextureFromImage(img)
                  Raylib.UnloadImage(img)
                  self.class.images[command.cache] = texture
                  Raylib.GenTextureMipmaps(texture)
                  texture
                end
              end

    Raylib.DrawTexture(texture, command.x, command.y, Raylib::WHITE)
  end

  Hokusai::Commands::Text.on_draw do |command|
    next unless inside_scissor(command.x, command.y, command.size)

    active_name = Hokusai.fonts.active_font_name
    font = Hokusai.fonts.active

    Hokusai.fonts.activate command.font.nil? ? active_name : command.font
    font = Hokusai.fonts.active

    c = color(command.color)
    x = command.x + command.padding.l
    y = command.y + command.padding.t

    if fnt = font
      # content = FFI::MemoryPointer.from_string(command.content)
      Raylib.DrawTextEx(fnt.raw, command.content.to_s, vec2(x, y), command.size, fnt.spacing, c)
      # content.free
    else
      Raylib.DrawText(command.content, x, y, command.size, c)
    end

    Hokusai.fonts.activate active_name
  end

  Hokusai::Commands::Rect.on_draw do |command|
    next unless inside_scissor(command.x, command.y, command.height)

    background_color = color(command.color)
    # the rect has an outline
    # so we want to render twice
    if command.outline?
      # for Raylib, the boundaries for background and outline are the same
      # rectangles render in from the boundary
      # and outlines render out from the boundary
      # background_rect = outline_rect
      outline_rect = rect(command.background_boundary)
      background_rect = outline_rect
      # rect is rounded so we need a rounded outline and
      # a regular one
      if command.rounding > 0
        Raylib.DrawRectangleRounded(background_rect, command.rounding, 50, background_color)
      else
        Raylib.DrawRectangleRec(background_rect, background_color)
      end

      outline_color = color(command.outline_color)

      # now draw the outlines
      if command.outline_uniform? && command.rounding > 0.0 && outline_color.a > 0
        Raylib.DrawRectangleRoundedLinesEx(outline_rect, command.rounding, 50, command.outline.top + 1, outline_color)
      elsif command.outline_uniform? && !(command.rounding <= 0.0) && outline_color.a > 0
        Raylib.DrawRectangleLinesEx(outline_rect, command.outline.top, outline_color)
      elsif !command.outline_uniform?
        ox, oy, ow, oh = command.background_boundary

        if command.outline.top > 0.0
          Raylib.DrawLineEx(vec2(ox, oy, true), vec2(ox + ow, oy, true), command.outline.top, outline_color)
        end

        if command.outline.left > 0.0
          Raylib.DrawLineEx(vec2(ox, oy, true), vec2(ox, oy + oh, true), command.outline.left, outline_color)
        end

        if command.outline.right > 0.0
          Raylib.DrawLineEx(vec2(ox + ow, oy, true), vec2(ox + ow, oy + oh, true), command.outline.right, outline_color)
        end

        if command.outline.bottom > 0.0
          Raylib.DrawLineEx(vec2(ox, oy + oh, true), vec2(ox + ow, oy + oh, true), command.outline.bottom, outline_color)
        end
      end
    else
      rect = rect(command.background_boundary)

      if command.rounding > 0
        Raylib.DrawRectangleRounded(rect, command.rounding, 50, background_color)
      else
        Raylib.DrawRectangleRec(rect, background_color)
      end
    end
  end
end

#run(block) ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 137

def run(block)
  self.class.reset

  case RbConfig::CONFIG['host_os']
  when /darwin/
    Raylib.load_lib("#{RAYLIB_PATH}/libraylib.dylib")
  when /mswin|msys|mingw/
    Raylib.load_lib("#{RAYLIB_PATH}/libraylib.dll")
  when /linux/
    Raylib.load_lib("#{RAYLIB_PATH}/libraylib.so")
  end

  resize = false
  initial = true
  width = config.width
  height = config.height

  register_command_handlers

  ptr = FFI::MemoryPointer.new :pointer
  LibHokusai.hoku_input_init(ptr)
  raw = LibHokusai::HmlInput.new(ptr.get_pointer(0))
  input = Hokusai::Input.new(raw)
  ptr.free

  Raylib.SetConfigFlags(config.config_flags)
  Raylib.InitWindow(config.width, config.height, config.title)
  Raylib.SetTargetFPS(config.fps)
  Raylib.SetWindowState(config.window_state_flags)

  unless Hokusai.fonts.get("default")
    Hokusai.fonts.register "default", Hokusai::Backends::RaylibBackend::Font.default
    Hokusai.fonts.activate "default"
  end

  config.after_load_cb&.call

  if config.automated
    config.start_automation_driver
  end
  
  canvas = Hokusai::Canvas.new(width.to_f, height.to_f, 0.0, 0.0)
  @texture = Raylib.LoadRenderTexture(width, height)
  Raylib.SetTextureFilter(@texture.texture, Raylib::TEXTURE_FILTER_POINT)

  width = nil
  height = nil

  MemoryProfiler.start if ENV["PROFILE"]

  Raylib.EnableEventWaiting if config.event_waiting
  last_input_hash = nil

  until Raylib.WindowShouldClose
    last_width = Raylib.GetScreenWidth
    last_height = Raylib.GetScreenHeight

    if last_width != width || last_height != height
      resize = true
    else
      resize = false
    end

    width = last_width
    height = last_height

    process_input(input)
    block.public_send(:before_updated) if block.respond_to?(:before_updated)
    block.update
    block.public_send(:after_updated) if block.respond_to?(:after_updated)

    canvas.reset(nil, nil, width.to_f, height.to_f)

    Raylib.BeginDrawing
    Raylib.ClearBackground(config.background)

    painter = Hokusai::Painter.new(block, input)

    if config.automation_driver
      painter.on_before_render do |blocks, canvas, input|
        config.automation_driver.process(blocks, canvas, input)
      end

      painter.on_after_render do
        config.automation_driver.complete
      end

      sleep 0.004
    end

    painter.render(canvas, resize)

    Raylib.DrawFPS(10, 10) if ENV["PROFILE"] || ENV["FPS"]
    Raylib.EndDrawing


    break if self.class.stopped?
  end

  Hokusai.fonts.fonts.each do |key, font|
    Raylib.UnloadFont(font.raw)
  end

  LibHokusai.hoku_input_free(input.raw)

  if ENV["PROFILE"]
    report = MemoryProfiler.stop
    report.pretty_print(scale_bytes: true)
  end

  Raylib.CloseWindow

  config.automation_driver&.stop
end

#vec2(x, y, fresh = false) ⇒ Object 



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# File 'ui/src/hokusai/backends/raylib.rb', line 40

def vec2(x, y, fresh = false)
  if @raylib_vec2.nil? || fresh
    @raylib_vec2 = Raylib::Vector2.new
  end
  @raylib_vec2[:x] = x
  @raylib_vec2[:y] = y

  @raylib_vec2
end