Method: Bitmap#gradient_fill_rect

Defined in:
lib/openrgss/bitmap.rb

#gradient_fill_rect(x, y, width, height = false, color1 = nil, color2 = nil, vertical = false) ⇒ Object

:call-seq: gradient_fill_rect(x, y, width, height, color1, color2[, vertical]) gradient_fill_rect(rect, color1, color2[, vertical])

Fills in this bitmap box (x, y, width, height) or rect (Rect) with a gradient from color1 (Color) to color2 (Color).

Set vertical to true to create a vertical gradient. Horizontal gradient is the default.



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# File 'lib/openrgss/bitmap.rb', line 124

def gradient_fill_rect(x, y, width, height=false, color1=nil, color2=nil, vertical=false)
  if x.is_a? Rect
    rect     = x
    color1   = y
    color2   = width
    vertical = height
    x        = rect.x
    y        = rect.y
    width    = rect.width
    height   = rect.height
  end
  if vertical
    height.times do |i|
      @entity.fill_rect(x, y+i, width, 1, @entity.map_rgba(
          color1.red + (color2.red - color1.red) * i / height,
          color1.green + (color2.green - color1.green) * i / height,
          color1.blue + (color2.blue - color1.blue) * i / height,
          color1.alpha + (color2.alpha - color1.alpha) * i / height
      ))
    end
  else
    width.times do |i|
      @entity.fill_rect(x+i, y, 1, height, @entity.map_rgba(
          color1.red + (color2.red - color1.red) * i / width,
          color1.green + (color2.green - color1.green) * i / width,
          color1.blue + (color2.blue - color1.blue) * i / width,
          color1.alpha + (color2.alpha - color1.alpha) * i / width
      ))
    end
  end
end