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Versions: 30
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Contents
module ChunkyPNG
class Canvas
# Methods to save load a canvas from to stream, encoded in RGB, RGBA, BGR or ABGR format.
module StreamExporting
# Creates an RGB-formatted pixelstream with the pixel data from this canvas.
#
# Note that this format is fast but bloated, because no compression is used
# and the internal representation is left intact. To reconstruct the
# canvas, the width and height should be known.
#
# @return [String] The RGBA-formatted pixel data.
def to_rgba_stream
pixels.pack('N*')
end
# Creates an RGB-formatted pixelstream with the pixel data from this canvas.
#
# Note that this format is fast but bloated, because no compression is used
# and the internal representation is almost left intact. To reconstruct
# the canvas, the width and height should be known.
#
# @return [String] The RGB-formatted pixel data.
def to_rgb_stream
pixels.pack('NX' * (width * height))
end
# Creates an ABGR-formatted pixelstream with the pixel data from this canvas.
#
# Note that this format is fast but bloated, because no compression is used
# and the internal representation is left intact. To reconstruct the
# canvas, the width and height should be known.
#
# @return [String] The RGBA-formatted pixel data.
def to_abgr_stream
pixels.pack('V*')
end
end
end
end
Version data entries
30 entries across 30 versions & 1 rubygems