app: Bug 753163 - Add blend mode "RGB Luminance"

This adds a blend mode similar to CIE Luminance - but that does not alter saturation.
2017-02-20 05:26:51 -05:00
parent eeebd98005
commit aaed8a6eb9
10 changed files with 89 additions and 31 deletions
--- a/app/operations/operations-enums.h
+++ b/app/operations/operations-enums.h
@ -85,6 +85,7 @@ typedef enum
  GIMP_LAYER_MODE_LCH_CHROMA,            /*< desc="Chroma (LCH)"             >*/
  GIMP_LAYER_MODE_LCH_COLOR,             /*< desc="Color (LCH)"              >*/
  GIMP_LAYER_MODE_LCH_LIGHTNESS,         /*< desc="Lightness (LCH)"          >*/
+  GIMP_LAYER_MODE_LUMINANCE,             /*< desc="Luminance"                >*/

  /*  Since 2.10  */
  GIMP_LAYER_MODE_NORMAL_LINEAR,         /*< desc="Normal (linear)"          >*/