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| author | Přemysl Janouch <p@janouch.name> | 2018-08-23 04:19:28 +0200 |
|---|---|---|
| committer | Přemysl Janouch <p@janouch.name> | 2018-09-02 18:25:35 +0200 |
| commit | 23586eae01b5ff3b187bd3786fe5c55f87f8c001 (patch) | |
| tree | 0afefeedb36b921673fd1876ffa739c355acae30 /prototypes | |
| parent | 9424579c7514aaaebe9d90a354929d52aed57f48 (diff) | |
| download | haven-23586eae01b5ff3b187bd3786fe5c55f87f8c001.tar.gz haven-23586eae01b5ff3b187bd3786fe5c55f87f8c001.tar.xz haven-23586eae01b5ff3b187bd3786fe5c55f87f8c001.zip | |
xgb-render: give up on composite alpha
Diffstat (limited to 'prototypes')
| -rw-r--r-- | prototypes/xgb-xrender.go | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/prototypes/xgb-xrender.go b/prototypes/xgb-xrender.go index dba6687..ea20624 100644 --- a/prototypes/xgb-xrender.go +++ b/prototypes/xgb-xrender.go @@ -234,13 +234,10 @@ func main() { bounds := f.Bounds(fixed.Int26_6(opts.Size * float64(opts.DPI) * (64.0 / 72.0))) - var rgbFormat render.Pictformat + var alphaFormat render.Pictformat for _, pf := range pformats.Formats { - // Hopefully. Might want to check ARGB/BGRA. - if pf.Depth == 32 && pf.Direct.AlphaMask != 0 { - rgbFormat = pf.Id - log.Printf("%+v\n", pf) - break + if pf.Depth == 8 && pf.Direct.AlphaMask == 0xff { + alphaFormat = pf.Id } } @@ -250,11 +247,12 @@ func main() { } // NOTE: A depth of 24 will not work, the server always rejects it. - _ = render.CreateGlyphSet(X, gsid, rgbFormat) + // Composite alpha doesn't make sense since golang/freetype can't use it. + _ = render.CreateGlyphSet(X, gsid, alphaFormat) - // TODO: Seems like we want to use NRGBA. Or RGBA if the A is always 1. - // Or implement our own image.Image for direct gamma-corrected RGB! - nrgb := image.NewRGBA(image.Rect( + // NOTE: We could do gamma post-correction in higher precision if we + // implemented our own clone of the image.Image implementation. + nrgb := image.NewGray(image.Rect( +bounds.Min.X.Floor(), -bounds.Min.Y.Floor(), +bounds.Max.X.Ceil(), |