Sha256: 74f3c7448e8393459194ee5e2478825ca1528d193c02783d12e24db2ad638bf9
Contents?: true
Size: 1.09 KB
Versions: 5
Compression:
Stored size: 1.09 KB
Contents
class PSD
class Renderer
class ClippingMask
attr_reader :canvas, :mask
def initialize(canvas)
@canvas = canvas
@node = @canvas.node
mask_node = @canvas.node.next_sibling
@mask = Canvas.new(mask_node)
end
def apply!
return unless @node.clipped?
PSD.logger.debug "Applying clipping mask #{mask.node.name} to #{@node.name}"
@canvas.height.times do |y|
@canvas.width.times do |x|
doc_x = @canvas.left + x
doc_y = @canvas.top + y
mask_x = doc_x - @mask.left
mask_y = doc_y - @mask.top
if mask_x < 0 || mask_x > mask.width || mask_y < 0 || mask_y > mask.height
alpha = 0
else
pixel = mask.canvas.pixels[mask_y * mask.width + mask_x]
alpha = pixel.nil? ? 0 : ChunkyPNG::Color.a(pixel)
end
color = @canvas[x, y]
@canvas[x, y] = (color & 0xffffff00) | (ChunkyPNG::Color.a(color) * alpha / 255)
end
end
end
end
end
end
Version data entries
5 entries across 5 versions & 2 rubygems