Class: RAGE::Text

Inherits:
Object
  • Object
show all
Defined in:
lib/rage/text.rb

Overview

Represents text to draw onscreen. Currently uses SDL_TTF to do so.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ Text

Returns a new instance of Text.



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# File 'lib/rage/text.rb', line 15

def initialize(args = {})
  unless defined? @@ttf_initialized
    @@ttf_initialize = true
    SDL::TTF.init
  end

  @text = args[:text]
  @font = args[:font]
  @font_file = args[:font_file]
  @font_size = args[:font_size]

  # TODO should make use of a font bank or such so fonts can be shared, also specify default font dirs (and allow more to be added)
  @font = SDL::TTF.open(@font_file, @font_size) if @font.nil? && !@font_file.nil? && !@font_size.nil?

  # TODO allow specification of many other font attributes
end

Instance Attribute Details

#text ⇒ Object

Returns the value of attribute text.



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# File 'lib/rage/text.rb', line 11

def text
  @text
end

Instance Method Details

#coordinates ⇒ Object

Return current location coordinates associated w/ the text



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# File 'lib/rage/text.rb', line 47

def coordinates
  [@location.x, @location.y, @location.z]
end

#draw ⇒ Object

Invoked during draw cycle to draw font



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# File 'lib/rage/text.rb', line 52

def draw
  # FIXME allow font color to be set, also perhaps use other render method (solid doesn't seem to work tho)
  surface = @font.render_blended_utf8(@text, 255, 255, 255)

  texture = Gl::glGenTextures(1)[0]
  Gl::glBindTexture(Gl::GL_TEXTURE_2D, texture);

  Gl::glTexParameterf(Gl::GL_TEXTURE_2D, Gl::GL_TEXTURE_MIN_FILTER, Gl::GL_LINEAR);
  Gl::glTexParameterf(Gl::GL_TEXTURE_2D, Gl::GL_TEXTURE_MAG_FILTER, Gl::GL_LINEAR);
  Gl::glTexImage2D(Gl::GL_TEXTURE_2D, 0, Gl::GL_RGBA, surface.w, surface.h, 0, Gl::GL_RGBA, Gl::GL_UNSIGNED_BYTE, surface.pixels);

  Gl::glBegin(Gl::GL_QUADS);
  # FIXME had to switch the order of these as the text seemed backwards, look into this (used to be 00,01,11,10)
  Gl::glTexCoord2d(0, 1); Gl::glVertex3d(*coordinates)
  Gl::glTexCoord2d(1, 1); Gl::glVertex3d(@location.x+surface.w, @location.y, @location.z)
  Gl::glTexCoord2d(1, 0); Gl::glVertex3d(@location.x+surface.w, @location.y+surface.h, @location.z);
  Gl::glTexCoord2d(0, 0); Gl::glVertex3d(@location.x, @location.y+surface.h, @location.z);
  Gl::glEnd();

  Gl::glDeleteTextures([texture]);
  #SDL.SDL_FreeSurface(surface);
end

#show_at(args = {}) ⇒ Object

Create location w/ specified args, associated text w/ it and add it to the LocationsManager



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# File 'lib/rage/text.rb', line 33

def show_at(args = {})
  # XXX not a huge fan of storing location interally,
  # but this is best way to do this for now
  if ! defined? @location
    args[:text] = self
    @location = Location.new(args)
    LocationsManager.instance.add @location
  else
    @location.update args
  end
  return @location
end