Class: DXRubySDL::Image

Inherits:
Object
  • Object
show all
Includes:
Color
Defined in:
lib/dxruby_sdl/image.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Color

to_sdl_alpha, to_sdl_color

Constructor Details

#initialize(width, height, color = [0, 0, 0, 0]) ⇒ Image

Returns a new instance of Image.



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# File 'lib/dxruby_sdl/image.rb', line 32

def initialize(width, height, color = [0, 0, 0, 0])
  @color = color

  if width == 0 && height == 0
    return
  end

  @_surface =
    SDL::Surface.new(SDL::SWSURFACE, width, height, Window.send(:screen))
  @_surface.fill_rect(0, 0, width, height, @color)

  # TODO: a値が0の時にしか対応していない。
  # 1から254の値に対応すること
  if color[3] == 0
    set_color_key(@color[0..2])
  end
end

Instance Attribute Details

#_surface ⇒ Object (readonly)

Returns the value of attribute _surface.



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# File 'lib/dxruby_sdl/image.rb', line 7

def _surface
  @_surface
end

Class Method Details

.load(filename, x = nil, y = nil, width = nil, height = nil) ⇒ Object 



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# File 'lib/dxruby_sdl/image.rb', line 9

def self.load(filename, x = nil, y = nil, width = nil, height = nil)
  image = new(0, 0)
  surface = SDL::Surface.load(filename)
  image.instance_variable_set('@_surface', surface)
  return image
end

.load_tiles(filename, xcount, ycount) ⇒ Object Also known as: loadTiles, load_to_array 



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# File 'lib/dxruby_sdl/image.rb', line 16

def self.load_tiles(filename, xcount, ycount)
  surface = SDL::Surface.load(filename)
  width = surface.w / xcount
  height = surface.h / ycount
  images = []
  ycount.times do |y|
    xcount.times do |x|
      image = new(0, 0)
      s = surface.copy_rect(x * width, y * height, width, height)
      image.instance_variable_set('@_surface', s)
      images << image
    end
  end
  return images
end

Instance Method Details

#box(x1, y1, x2, y2, color) ⇒ Object 



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# File 'lib/dxruby_sdl/image.rb', line 98

def box(x1, y1, x2, y2, color)
  x = x1 < x2 ? x1 : x2
  w = (x2 - x1).abs
  y = y1 < y2 ? y1 : y2
  h = (y2 - y1).abs
  lock do
    @_surface.draw_rect(x, y, w, h, to_sdl_color(color), false,
                        to_sdl_alpha(color))
  end
  return self
end

#box_fill(x1, y1, x2, y2, color) ⇒ Object Also known as: boxFill 



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# File 'lib/dxruby_sdl/image.rb', line 110

def box_fill(x1, y1, x2, y2, color)
  x = x1 < x2 ? x1 : x2
  w = (x2 - x1).abs
  y = y1 < y2 ? y1 : y2
  h = (y2 - y1).abs
  lock do
    @_surface.draw_rect(x, y, w, h, to_sdl_color(color), true,
                        to_sdl_alpha(color))
  end
  return self
end

#circle(x, y, r, color) ⇒ Object 



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# File 'lib/dxruby_sdl/image.rb', line 82

def circle(x, y, r, color)
  lock do
    @_surface.draw_circle(x, y, r, to_sdl_color(color), false, true,
                          to_sdl_alpha(color))
  end
  return self
end

#circle_fill(x, y, r, color) ⇒ Object Also known as: circleFill 



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# File 'lib/dxruby_sdl/image.rb', line 90

def circle_fill(x, y, r, color)
  lock do
    @_surface.draw_circle(x, y, r, to_sdl_color(color), true, false,
                          to_sdl_alpha(color))
  end
  return self
end

#compare(x, y, color) ⇒ Object 



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# File 'lib/dxruby_sdl/image.rb', line 62

def compare(x, y, color)
  pixel = lock { @_surface.get_pixel(x, y) }
  return @_surface.format.get_rgb(pixel) == color
end

#draw(x, y, image, x1 = 0, y1 = 0, width = image.width, height = image.height) ⇒ Object 



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# File 'lib/dxruby_sdl/image.rb', line 122

def draw(x, y, image, x1 = 0, y1 = 0, width = image.width, height = image.height)
  SDL.blitSurface(image._surface, x1, y1, width, height, self._surface, x, y)
end

#draw_font(x, y, string, font, color = [255, 255, 255]) ⇒ Object Also known as: drawFont 



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# File 'lib/dxruby_sdl/image.rb', line 126

def draw_font(x, y, string, font, color = [255, 255, 255])
  if string.empty?
    return
  end
  r, g, b = *color
  h = font._ttf.height + 1
  string.lines.each.with_index do |line, i|
    line.chomp!
    if line.empty?
      next
    end
    font._ttf.draw_blended_utf8(@_surface, line, x, y + i * h, r, g, b)
  end
  return self
end

#height ⇒ Object 



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# File 'lib/dxruby_sdl/image.rb', line 54

def height
  return @_surface.h
end

#line(x1, y1, x2, y2, color) ⇒ Object 



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# File 'lib/dxruby_sdl/image.rb', line 74

def line(x1, y1, x2, y2, color)
  lock do
    @_surface.draw_line(x1, y1, x2, y2,
                        to_sdl_color(color), true, to_sdl_alpha(color))
  end
  return self
end

#set_color_key(color) ⇒ Object Also known as: setColorKey 



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# File 'lib/dxruby_sdl/image.rb', line 58

def set_color_key(color)
  @_surface.set_color_key(SDL::SRCCOLORKEY | SDL::RLEACCEL, color)
end

#slice(x, y, width, height) ⇒ Object 



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# File 'lib/dxruby_sdl/image.rb', line 67

def slice(x, y, width, height)
  s = @_surface.copy_rect(x, y, width, height)
  image = Image.new(0, 0)
  image.instance_variable_set('@_surface', s)
  return image
end

#width ⇒ Object 



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# File 'lib/dxruby_sdl/image.rb', line 50

def width
  return @_surface.w
end