Encodes raw RGBA pixels as a PNG.
Only what FrenchCurve.Backend.Iterm2 needs to wrap a raster in the one image format
iTerm2's inline-image protocol accepts. Encoding only; there is no decoder.
png = FrenchCurve.Png.encode(width, height, FrenchCurve.Raster.to_rgba_binary(raster))Summary
Functions
Encodes a dense RGBA buffer as a complete PNG binary.
Functions
@spec encode(pos_integer(), pos_integer(), binary()) :: binary()
Encodes a dense RGBA buffer as a complete PNG binary.
rgba must be exactly width * height * 4 bytes, four bytes per pixel in red, green,
blue, alpha order and rows top to bottom; a mismatched size raises FunctionClauseError,
as do non-positive dimensions.
The result is an 8-bit-per-channel truecolour-with-alpha PNG whose scanlines all use
filter type 0 and whose pixel data sits in a single zlib-compressed IDAT chunk.