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@@ -8,29 +8,32 @@ DESCRIPTION rasterise glyphs nor does it know about the montor's subpixel layout or rendering configurations. - To use libglitter you first apply hinting to the text so that - the glyph outlines aligns with the output's pixel-grid as - closely as possible. The next step is to get the output's - subpixel arrangement and scaling factor, then assuming that - the output's subpixel arrangement is subpixel-rendering - compatible and that its native resolution is used, you - rasterise the text using greyscale-antialiasing into a raster - sized according to the output's horizontal and vertical + To use libglitter you first (optionally) apply hinting to the + text so that the glyph outlines aligns with the output's + pixel-grid as closely as possible. The next step is to get + the output's subpixel arrangement and scaling factor, then + assuming that the output's subpixel arrangement is subpixel- + rendering compatible and that its native resolution is used, + you rasterise the text using greyscale-antialiasing into a + raster sized according to the output's horizontal and vertical subpixel densities (rather than pixel densities as normally done with greyscale-antialiasing; some subpixels may have be counted multiple times depending on the subpixel arrangement). - After this you create an uninitialised colour raster for text - and the output's pixel density, and split it into one raster - per colour channel using libglitter_split_uint64_raster(3) or - libglitter_split_uint32_raster(3), this is when libglitter is - first used in this process; alternatively you create one - raster for each colour channel directly. Then you use - libglitter_compose_double(3), libglitter_compose_float(3), - libglitter_compose_uint64(3), libglitter_compose_uint32(3), - libglitter_compose_uint16(3), or libglitter_compose_uint8(3) - to create the subpixel-antialiased image of the text; you may - have to first call libglitter_reorder_rasters(3) to put the - rasters in the expected order. + At this point, depending on final result, you may (will + probably) want to use libglitter_redistribute_energy_double(3) + or libglitter_redistribute_energy_float(3) to make the text a + bit blurrier but reduce colour fringing. After this you create + an uninitialised colour raster for text and the output's pixel + density, and split it into one raster per colour channel using + libglitter_split_uint64_raster(3) or libglitter_split_uint32_- + raster(3), this is when libglitter is first used in this + process; alternatively you create one raster for each colour + channel directly. Then you use libglitter_compose_double(3), + libglitter_compose_float(3), libglitter_compose_uint64(3), + libglitter_compose_uint32(3), libglitter_compose_uint16(3), or + libglitter_compose_uint8(3) to create the subpixel-antialiased + image of the text; you may have to first call libglitter_- + reorder_rasters(3) to put the rasters in the expected order. An optional next step is to use lessen the intensity of the subpixel-antialiasing with libglitter_desaturate_double(3), |