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fix generated alpha channel

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This commit is contained in:
Rudolf Polzer 2010-08-20 17:52:39 +02:00
parent 79741c1f70
commit 33b9faedac
1 changed files with 6 additions and 0 deletions
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6
misc/tools/normalmap.sh
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@ -2,6 +2,7 @@
# usage: ./bump2norm.sh foo_bump.tga foo_norm.tga
# NOTE: unfortunately requires X-server (otherwise file-tga-save won't work... no joke)
# also, alpha channel value 0 is avoided as gimp doesn't save it properly
in=$1
out=$2
@ -29,9 +30,14 @@ gimp -i -b - <<EOF
(img (car (gimp-file-load RUN-NONINTERACTIVE "$in" "$in")))
(drawable (car (gimp-image-active-drawable img)))
(layer (car (gimp-image-get-active-layer img)))
(mycurve (cons-array 256 'byte))
(i 1)
)
(gimp-layer-add-alpha layer)
(plug-in-normalmap RUN-NONINTERACTIVE img drawable $filter $minz $scale 1 $heightsource 1 $conv 0 0 1 0 1 layer)
(aset mycurve 0 1)
(while (< i 256) (aset mycurve i i) (set! i (+ i 1)))
(gimp-curves-explicit drawable HISTOGRAM-ALPHA 256 mycurve)
(file-tga-save RUN-NONINTERACTIVE img drawable "$out" "$out" 1 1)
(gimp-quit 0)
)