RPG Maker Forums

module FrameBuffer
 
  def self.start(frames = 1, viewport_z = 10000)
    dispose unless disposed?
    this_frame =  Graphics.snap_to_bitmap
    @buffer = []
    @viewport = Viewport.new(0,0,544,416)
    @viewport.z = viewport_z
   
    frames.times do
      sprite = Sprite.new(@viewport)
      sprite.bitmap = this_frame.clone
      sprite.x = Graphics.width / 2
      sprite.y = Graphics.height / 2
      sprite.ox = Graphics.width / 2
      sprite.oy = Graphics.height / 2
      @buffer.push(sprite)
    end
    this_frame.dispose
  end
   
  def self.dispose
    return if disposed?
    @buffer.each {|sprite| sprite.dispose}
    @viewport.dispose if @viewport
    @buffer = nil
  end
   
  def self.disposed?
    !@buffer
  end
#===============================================================================
# Deletes the oldest frame bitmaps and shuffles all the bitmaps down
# replacing the first frame with a fresh snap shot.
#===============================================================================
  def self.cycle
    return if disposed?
    @buffer[-1].bitmap.dispose
    @buffer.each_index do |i|
      next if i == 0
      @buffer[i].bitmap = @buffer[i - 1].bitmap
    end
    @buffer[0].bitmap = Graphics.snap_to_bitmap
  end
#===============================================================================
# Set's all the frame buffer sprites to use a fresh snapshot.
#===============================================================================
  def self.refresh
    this_frame = Graphics.snap_to_bitmap
    @buffer.each do |sprite|
      sprite.bitmap.dispose
      sprite.bitmap = this_frame.clone
    end
    this_frame.dispose
  end
 
  def self.[](num)
    return nil if disposed?
    return @buffer[num]
  end
 
end

class Scene_Map < Scene_Base
 
#===============================================================================
# Preprocessing for Battle Screen Transition.
#===============================================================================

  alias fbst_call_battle call_battle
  def call_battle
    Graphics.update
    Graphics.freeze
   
    FrameBuffer.start(3)
   
    FrameBuffer[0].z = 0
    FrameBuffer[0].zoom_x = 1
    FrameBuffer[0].zoom_y = 1
    FrameBuffer[0].opacity = 235
    FrameBuffer[0].angle = 0
    FrameBuffer[0].blend_type = 0

    FrameBuffer[1].z = 1
    FrameBuffer[1].zoom_x = 1.2
    FrameBuffer[1].zoom_y = 1.2
    FrameBuffer[1].opacity = 128
    FrameBuffer[1].angle = 2872
    FrameBuffer[1].blend_type = 0
   
    FrameBuffer[2].z = 2
    FrameBuffer[2].zoom_x = 0.8
    FrameBuffer[2].zoom_y = 0.9
    FrameBuffer[2].opacity = 12
    FrameBuffer[2].angle = 5744
    FrameBuffer[2].blend_type = 1
   
    fbst_call_battle
   
    #@spriteset.dispose_characters
    #BattleManager.save_bgm_and_bgs
    #BattleManager.play_battle_bgm
    #Sound.play_battle_start
  end
 
#===============================================================================
# Execute Pre-battle Transition
#===============================================================================

  def perform_battle_transition
    Graphics.transition(1)
    (0..30).each do |i|
      Graphics.brightness = 255
      FrameBuffer.refresh
      Graphics.frame_reset
      Graphics.brightness = 255 - (255 * ((i - 20) / 10.0)) if i > 20
      Graphics.update
    end
    FrameBuffer.dispose
    Graphics.freeze
  end
 
end