Class: Mittsu::Texture

Inherits:
Object
  • Object
show all
Includes:
EventDispatcher
Defined in:
lib/mittsu/textures/texture.rb,
lib/mittsu/renderers/opengl/textures/texture.rb

Constant Summary collapse

DEFAULT_IMAGE = 
nil
DEFAULT_MAPPING = 
UVMapping

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from EventDispatcher

#add_event_listener, #dispatch_event, #has_event_listener, #remove_event_listener

Constructor Details

#initialize(image = DEFAULT_IMAGE, mapping = DEFAULT_MAPPING, wrap_s = ClampToEdgeWrapping, wrap_t = ClampToEdgeWrapping, mag_filter = LinearFilter, min_filter = LinearMipMapLinearFilter, format = RGBAFormat, type = UnsignedByteType, anisotropy = 1) ⇒ Texture

Returns a new instance of Texture.



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# File 'lib/mittsu/textures/texture.rb', line 18

def initialize(image = DEFAULT_IMAGE, mapping = DEFAULT_MAPPING, wrap_s = ClampToEdgeWrapping, wrap_t = ClampToEdgeWrapping, mag_filter = LinearFilter, min_filter = LinearMipMapLinearFilter, format = RGBAFormat, type = UnsignedByteType, anisotropy = 1)
  super()

  @id = (@@id ||= 1).tap { @@id += 1 }
  @uuid = SecureRandom.uuid

  @name = ''
  @source_file = ''

  @image = image
  @mipmaps = []

  @mapping = mapping
  @wrap_s, @wrap_t = wrap_s, wrap_t
  @mag_filter, @min_filter = mag_filter, min_filter
  @anisotropy = anisotropy
  @format, @type = format, type

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

  @generate_mipmaps = true
  @premultiply_alpha = false
  @filp_y = true
  @unpack_alignment = 4 # valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)

  @_needs_update = false
  @on_update = nil
  @_listeners = {}
end

Instance Attribute Details

#anisotropy ⇒ Object

Returns the value of attribute anisotropy.



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# File 'lib/mittsu/textures/texture.rb', line 15

def anisotropy
  @anisotropy
end

#filp_y ⇒ Object

Returns the value of attribute filp_y.



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# File 'lib/mittsu/textures/texture.rb', line 15

def filp_y
  @filp_y
end

#format ⇒ Object

Returns the value of attribute format.



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# File 'lib/mittsu/textures/texture.rb', line 15

def format
  @format
end

#generate_mipmaps ⇒ Object

Returns the value of attribute generate_mipmaps.



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# File 'lib/mittsu/textures/texture.rb', line 15

def generate_mipmaps
  @generate_mipmaps
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/mittsu/textures/texture.rb', line 13

def id
  @id
end

#image ⇒ Object

Returns the value of attribute image.



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# File 'lib/mittsu/textures/texture.rb', line 15

def image
  @image
end

#mag_filter ⇒ Object

Returns the value of attribute mag_filter.



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# File 'lib/mittsu/textures/texture.rb', line 15

def mag_filter
  @mag_filter
end

#mapping ⇒ Object

Returns the value of attribute mapping.



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# File 'lib/mittsu/textures/texture.rb', line 15

def mapping
  @mapping
end

#min_filter ⇒ Object

Returns the value of attribute min_filter.



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# File 'lib/mittsu/textures/texture.rb', line 15

def min_filter
  @min_filter
end

#mipmaps ⇒ Object

Returns the value of attribute mipmaps.



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# File 'lib/mittsu/textures/texture.rb', line 15

def mipmaps
  @mipmaps
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/mittsu/textures/texture.rb', line 15

def name
  @name
end

#offset ⇒ Object

Returns the value of attribute offset.



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# File 'lib/mittsu/textures/texture.rb', line 15

def offset
  @offset
end

#on_update ⇒ Object

Returns the value of attribute on_update.



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# File 'lib/mittsu/textures/texture.rb', line 15

def on_update
  @on_update
end

#opengl_texture ⇒ Object (readonly)

Returns the value of attribute opengl_texture.



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# File 'lib/mittsu/renderers/opengl/textures/texture.rb', line 3

def opengl_texture
  @opengl_texture
end

#premultiply_alpha ⇒ Object

Returns the value of attribute premultiply_alpha.



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# File 'lib/mittsu/textures/texture.rb', line 15

def premultiply_alpha
  @premultiply_alpha
end

#repeat ⇒ Object

Returns the value of attribute repeat.



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# File 'lib/mittsu/textures/texture.rb', line 15

def repeat
  @repeat
end

#source_file ⇒ Object

Returns the value of attribute source_file.



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# File 'lib/mittsu/textures/texture.rb', line 15

def source_file
  @source_file
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/mittsu/textures/texture.rb', line 15

def type
  @type
end

#unpack_alignment ⇒ Object

Returns the value of attribute unpack_alignment.



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# File 'lib/mittsu/textures/texture.rb', line 15

def unpack_alignment
  @unpack_alignment
end

#uuid ⇒ Object (readonly)

Returns the value of attribute uuid.



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# File 'lib/mittsu/textures/texture.rb', line 13

def uuid
  @uuid
end

#wrap_s ⇒ Object

Returns the value of attribute wrap_s.



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# File 'lib/mittsu/textures/texture.rb', line 15

def wrap_s
  @wrap_s
end

#wrap_t ⇒ Object

Returns the value of attribute wrap_t.



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# File 'lib/mittsu/textures/texture.rb', line 15

def wrap_t
  @wrap_t
end

Instance Method Details

#clone(texture = Texture.new) ⇒ Object 



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# File 'lib/mittsu/textures/texture.rb', line 58

def clone(texture = Texture.new)
  texture.image = @image
  texture.mipmaps = @mipmaps.dup

  texture.mapping = @mapping

  texture.wrap_s = @wrap_s
  texture.wrap_t = @wrap_t

  texture.mag_filter = @mag_filter
  texture.min_filter = @min_filter

  texture.anisotropy = @anisotropy

  texture.format = @format
  texture.type = @type

  texture.offset.copy(@offset)
  texture.repeat.copy(@repeat)

  texture.generate_mipmaps = @generate_mipmaps
  texture.premultiply_alpha = @premultiply_alpha
  texture.flip_y = @flip_y

  texture
end

#dispose ⇒ Object 



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# File 'lib/mittsu/textures/texture.rb', line 89

def dispose
  dispatch_event type: :dispose
end

#needs_update=(value) ⇒ Object 



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# File 'lib/mittsu/textures/texture.rb', line 53

def needs_update=(value)
  update if value
  @_needs_update = value
end

#needs_update? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mittsu/textures/texture.rb', line 49

def needs_update?
  @_needs_update
end

#set(slot, renderer) ⇒ Object 



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# File 'lib/mittsu/renderers/opengl/textures/texture.rb', line 5

def set(slot, renderer)
  @renderer = renderer

  glActiveTexture(GL_TEXTURE0 + slot)

  if needs_update?
    update_opengl(@renderer)
  else
    glBindTexture(GL_TEXTURE_2D, @opengl_texture)
  end
end

#update ⇒ Object 



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# File 'lib/mittsu/textures/texture.rb', line 85

def update
  dispatch_event type: :update
end

#update_opengl(renderer) ⇒ Object 



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# File 'lib/mittsu/renderers/opengl/textures/texture.rb', line 17

def update_opengl(renderer)
  @renderer = renderer

  if !@initted
    @initted = true
    add_event_listener(:dispose, @renderer.method(:on_texture_dispose))
    @opengl_texture = glCreateTexture
    @renderer.info[:memory][:textures] += 1
  end

  glBindTexture(GL_TEXTURE_2D, @opengl_texture)

  # glPixelStorei(GL_UNPACK_FLIP_Y_WEBGL, flip_y) ???
  # glPixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_WEBGL, premultiply_alpha) ???
  glPixelStorei(GL_UNPACK_ALIGNMENT, unpack_alignment)

  self.image = @renderer.clamp_to_max_size(image)

  is_image_power_of_two = Math.power_of_two?(image.width) && Math.power_of_two?(image.height)

  set_parameters(GL_TEXTURE_2D, is_image_power_of_two)

  update_specific

  if generate_mipmaps && is_image_power_of_two
    glGenerateMipmap(GL_TEXTURE_2D)
  end

  self.needs_update = false

  on_update.call if on_update
end