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Desaturate to Luminance using AnyRGB 

Issue #3436 Replace sRGB Y values with Y values from XYZ for the
image's actual RGB space

This patch is for Colors/Desaturate/Desaturate to Luminance or
Luma.
This commit is contained in:
Elle Stone 2019-05-31 19:05:45 -04:00 committed by Øyvind Kolås
parent 8d9e70011d
commit 762fd66d28
1 changed files with 7 additions and 2 deletions
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9
app/operations/gimpoperationdesaturate.c
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@ -167,8 +167,12 @@ gimp_operation_desaturate_process (GeglOperation *operation,
gint level)
{
GimpOperationDesaturate *desaturate = GIMP_OPERATION_DESATURATE (operation);
gfloat *src = in_buf;
gfloat *dest = out_buf;
double red_luminance, green_luminance, blue_luminance;
const Babl *space = gegl_operation_get_source_space (operation, "input");
babl_space_get_rgb_luminance (space, &red_luminance, &green_luminance, &blue_luminance);
switch (desaturate->mode)
{
@ -201,8 +205,9 @@ gimp_operation_desaturate_process (GeglOperation *operation,
case GIMP_DESATURATE_LUMINANCE:
while (samples--)
{
gfloat value = GIMP_RGB_LUMINANCE (src[0], src[1], src[2]);
gfloat value = (src[0] * red_luminance) +
(src[1] * green_luminance) +
(src[2] * blue_luminance);
dest[0] = value;
dest[1] = value;
dest[2] = value;