Class: Mittsu::OpenGLDataTexture

Inherits:
OpenGLTexture show all
Defined in:
lib/mittsu/renderers/opengl/textures/opengl_data_texture.rb

Instance Attribute Summary

Attributes inherited from OpenGLTexture

#opengl_texture

Instance Method Summary collapse

Methods inherited from OpenGLTexture

#initialize, #set, #update

Constructor Details

This class inherits a constructor from Mittsu::OpenGLTexture

Instance Method Details

#update_specific ⇒ Object 



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

def update_specific
  gl_format = GL_MITTSU_PARAMS[@texture.format]
  gl_type = GL_MITTSU_PARAMS[@texture.type]
  mipmaps = @texture.mipmaps
  image = @texture.image
  is_image_power_of_two = Math.power_of_two?(image.width) && Math.power_of_two?(image.height)

  # use manually created mipmaps if available
  # if there are no manual mipmaps
  # set 0 level mipmap and then use GL to generate other mipmap levels

  if !mipmaps.empty? && is_image_power_of_two
    mipmaps.each_with_index do |mipmap, i|
      glTexImage2D(GL_TEXTURE_2D, i, gl_format, mipmap.width, mipmap.height, 0, gl_format, gl_type, mipmap.data)
    end
  else
    glTexImage2D(GL_TEXTURE_2D, 0, gl_format, image.width, image.height, 0, gl_format, gl_type, image.data)
  end
end