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change the pow() workaround to be more HDR safe

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Simon Budig
2012-05-10 21:26:48 +02:00
parent 7ccd10748d
commit 8f40eba702
1 changed files with 1 additions and 4 deletions
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5
app/operations/gimpoperationlevels.c
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@ -86,16 +86,13 @@ gimp_operation_levels_map (gdouble value,
gdouble low_output, gdouble low_output,
gdouble high_output) gdouble high_output)
{ {
/* clamp to guard pow() against negative input */
value = MAX (value, low_input);
/* determine input intensity */ /* determine input intensity */
if (high_input != low_input) if (high_input != low_input)
value = (value - low_input) / (high_input - low_input); value = (value - low_input) / (high_input - low_input);
else else
value = (value - low_input); value = (value - low_input);
if (inv_gamma != 1.0) if (inv_gamma != 1.0 && value > 0)
value = pow (value, inv_gamma); value = pow (value, inv_gamma);
/* determine the output intensity */ /* determine the output intensity */