Class: Mittsu::OpenGLRenderTarget

Inherits:
Texture
  • Object
show all
Includes:
EventDispatcher
Defined in:
lib/mittsu/renderers/opengl_render_target.rb

Constant Summary

Constants inherited from Texture

Texture::DEFAULT_IMAGE, Texture::DEFAULT_MAPPING

Instance Attribute Summary collapse

Attributes inherited from Texture

#filp_y, #id, #image, #mapping, #mipmaps, #name, #on_update, #opengl_texture, #premultiply_alpha, #source_file, #unpack_alignment, #uuid

Instance Method Summary collapse

Methods included from EventDispatcher

#add_event_listener, #dispatch_event, #has_event_listener, #remove_event_listener

Methods inherited from Texture

#needs_update=, #set, #update, #update_opengl

Constructor Details

#initialize(width, height, options = {}) ⇒ OpenGLRenderTarget

Returns a new instance of OpenGLRenderTarget.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 25

def initialize(width, height, options = {})
  super(self, nil)

  @width = width
  @height = height

  @wrap_s = options.fetch(:wrap_s, ClampToEdgeWrapping)
  @wrap_t = options.fetch(:wrap_t, ClampToEdgeWrapping)

  @mag_filter = options.fetch(:mag_filter, LinearFilter)
  @min_filter = options.fetch(:min_filter, LinearMipMapLinearFilter)

  @anisotropy = options.fetch(:anisotropy, 1.0);

  @offset = Vector2.new(0.0, 0.0)
  @repeat = Vector2.new(1.0, 1.0)

  @format = options.fetch(:format, RGBAFormat)
  @type = options.fetch(:type, UnsignedByteType)

  @depth_buffer = options.fetch(:depth_buffer, true)
  @stencil_buffer = options.fetch(:stencil_buffer, true)

  @generate_mipmaps = true

  @share_depth_from = options.fetch(:share_depth_from, nil)
end

Instance Attribute Details

#anisotropy ⇒ Object

Returns the value of attribute anisotropy.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def anisotropy
  @anisotropy
end

#depth_buffer ⇒ Object

Returns the value of attribute depth_buffer.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def depth_buffer
  @depth_buffer
end

#format ⇒ Object

Returns the value of attribute format.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def format
  @format
end

#framebuffer ⇒ Object (readonly)

Returns the value of attribute framebuffer.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 21

def framebuffer
  @framebuffer
end

#generate_mipmaps ⇒ Object

Returns the value of attribute generate_mipmaps.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def generate_mipmaps
  @generate_mipmaps
end

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def height
  @height
end

#mag_filter ⇒ Object

Returns the value of attribute mag_filter.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def mag_filter
  @mag_filter
end

#min_filter ⇒ Object

Returns the value of attribute min_filter.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def min_filter
  @min_filter
end

#offset ⇒ Object

Returns the value of attribute offset.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def offset
  @offset
end

#renderer=(value) ⇒ Object (writeonly)

Sets the attribute renderer

Parameters:

  • value —

    the value to set the attribute renderer to.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 23

def renderer=(value)
  @renderer = value
end

#repeat ⇒ Object

Returns the value of attribute repeat.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def repeat
  @repeat
end

#share_depth_from ⇒ Object

Returns the value of attribute share_depth_from.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def share_depth_from
  @share_depth_from
end

#stencil_buffer ⇒ Object

Returns the value of attribute stencil_buffer.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def stencil_buffer
  @stencil_buffer
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def type
  @type
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def width
  @width
end

#wrap_s ⇒ Object

Returns the value of attribute wrap_s.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def wrap_s
  @wrap_s
end

#wrap_t ⇒ Object

Returns the value of attribute wrap_t.



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 5

def wrap_t
  @wrap_t
end

Instance Method Details

#clone ⇒ Object 



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 62

def clone
  OpenGLRenderTarget.new(@width, @height).tap do |tmp|
    tmp.renderer = @renderer

		tmp.wrap_s = @wrap_s
		tmp.wrap_t = @wrap_t

		tmp.mag_filter = @mag_filter
		tmp.min_filter = @min_filter

		tmp.anisotropy = @anisotropy

		tmp.offset.copy(@offset)
		tmp.repeat.copy(@repeat)

		tmp.format = @format
		tmp.type = @type

		tmp.depth_buffer = @depth_buffer
		tmp.stencil_buffer = @stencil_buffer

		tmp.generate_mipmaps = @generate_mipmaps

		tmp.share_depth_from = @share_depth_from
  end
end

#dispose ⇒ Object 



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 158

def dispose
  dispatch_event(type: :dispose)
end

#needs_update? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 58

def needs_update?
  false
end

#set_size(width, height) ⇒ Object 



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 53

def set_size(width, height)
  @width = width
  @height = height
end

#setup_buffers ⇒ Object 



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 89

def setup_buffers
  return unless @framebuffer.nil?

  # TODO: when OpenGLRenderTargetCube exists
  is_cube = false # render_target.is_a? OpenGLRenderTargetCube

  @depth_buffer = true if @depth_buffer.nil?
  @stencil_buffer = true if @stencil_buffer.nil?

  add_event_listener(:dispose, @renderer.method(:on_render_target_dispose))

  @opengl_texture = glCreateTexture

  @renderer.info[:memory][:textures] += 1

  # Setup texture, create render and frame buffers

  is_target_power_of_two = Math.power_of_two?(@width) && Math.power_of_two?(@height)
  gl_format = GL_MITTSU_PARAMS[@format]
  gl_type = GL_MITTSU_PARAMS[@type]

  if is_cube
    # TODO
  else
    @framebuffer = glCreateFramebuffer

    if @share_depth_from
      @renderbuffer = share_depth_from.renderbuffer
    else
      @renderbuffer = glCreateRenderbuffer
    end

    glBindTexture(GL_TEXTURE_2D, @opengl_texture)
    set_parameters(GL_TEXTURE_2D, is_target_power_of_two)

    glTexImage2D(GL_TEXTURE_2D, 0, gl_format, @width, @height, 0, gl_format, gl_type, nil)

    setup_framebuffer(GL_TEXTURE_2D)

    if @share_depth_from
      if @depth_buffer && !@stencil_buffer
        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, @renderbuffer)
      elsif @depth_buffer && @stencil_buffer
        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, @renderbuffer)
      end
    else
      setup_renderbuffer
    end

    glGenerateMipmap(GL_TEXTURE_2D) if is_target_power_of_two
  end

  # Release everything

  if is_cube
    # TODO
  else
    glBindTexture(GL_TEXTURE_2D, 0)
  end

  glBindRenderbuffer(GL_RENDERBUFFER, 0)
  glBindFramebuffer(GL_FRAMEBUFFER, 0)
end

#update_mipmap ⇒ Object 



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 162

def update_mipmap
  return if !@generate_mipmaps || @min_filter == NearestFilter || @min_filter == LinearFilter
  # TODO: when OpenGLRenderTargetCube exists
# 	glBindTexture(GL_TEXTURE_CUBE_MAP, @opengl_texture)
# 	glGenerateMipmap(GL_TEXTURE_CUBE_MAP)
# 	glBindTexture(GL_TEXTURE_CUBE_MAP, nil)
			glBindTexture(GL_TEXTURE_2D, @opengl_texture)
			glGenerateMipmap(GL_TEXTURE_2D)
			glBindTexture(GL_TEXTURE_2D, nil)
end

#use ⇒ Object 



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# File 'lib/mittsu/renderers/opengl_render_target.rb', line 153

def use
  glBindFramebuffer(GL_FRAMEBUFFER, @framebuffer)
  glViewport(0, 0, @width, @height)
end