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app: add split layer mode

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Subtracts the source layer from the destination, such that
recompositing the result with the source using merge mode
reproduces the original content.
This commit is contained in:
Ell
2017-03-10 18:28:40 -05:00
parent 23e6984d46
commit ed0fda032d
11 changed files with 303 additions and 4 deletions
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18
app/operations/layer-modes/gimp-layer-modes.c
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@ -51,6 +51,7 @@
#include "gimpoperationmerge.h"
#include "gimpoperationnormal.h"
#include "gimpoperationreplace.h"
#include "gimpoperationsplit.h"
#include "gimp-layer-modes.h"
@ -848,6 +849,18 @@ static const GimpLayerModeInfo layer_mode_infos[] =
.composite_space = GIMP_LAYER_COLOR_SPACE_RGB_LINEAR
},
{ GIMP_LAYER_MODE_SPLIT,
.op_name = "gimp:split",
.function = gimp_operation_split_process,
.flags = GIMP_LAYER_MODE_FLAG_BLEND_SPACE_IMMUTABLE |
GIMP_LAYER_MODE_FLAG_COMPOSITE_SPACE_IMMUTABLE |
GIMP_LAYER_MODE_FLAG_SUBTRACTIVE,
.context = GIMP_LAYER_MODE_CONTEXT_ALL,
.paint_composite_mode = GIMP_LAYER_COMPOSITE_SRC_ATOP,
.composite_mode = GIMP_LAYER_COMPOSITE_SRC_ATOP
},
{ GIMP_LAYER_MODE_REPLACE,
.op_name = "gimp:replace",
@ -881,6 +894,7 @@ static const GimpLayerMode layer_mode_group_default[] =
GIMP_LAYER_MODE_ERASE,
GIMP_LAYER_MODE_ANTI_ERASE,
GIMP_LAYER_MODE_MERGE,
GIMP_LAYER_MODE_SPLIT,
GIMP_LAYER_MODE_SEPARATOR,
@ -1121,6 +1135,10 @@ static const GimpLayerMode layer_mode_groups[][2] =
[GIMP_LAYER_MODE_GROUP_LEGACY ] = -1
},
{ [GIMP_LAYER_MODE_GROUP_DEFAULT] = GIMP_LAYER_MODE_SPLIT,
[GIMP_LAYER_MODE_GROUP_LEGACY ] = -1
},
{ [GIMP_LAYER_MODE_GROUP_DEFAULT] = GIMP_LAYER_MODE_REPLACE,
[GIMP_LAYER_MODE_GROUP_LEGACY ] = -1
},