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8f4700b83908169a2da6adc900389f79e7f0e30d
gimp/app/core/gimp-layer-modes.c
Ell 8f4700b839 app: add "hard mix" blend mode 
Similar to the Photoshop mode of the same name.  Assigns
either 0 or 1 to each of the channels, depending on whether the
sum of source and destination channel values is less than, or
greater than (or equals to), one, respectively.

This is equivalent to inverting the source, and using it to perform
per-pixel, per-channel threshold against the destination, which is
useful for various effects.
2017-02-04 21:30:56 -05:00

575 lines
13 KiB
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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimp-layer-modes.c
* Copyright (C) 2017 Michael Natterer <mitch@gimp.org>
* Øyvind Kolås <pippin@gimp.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <glib-object.h>
#include "core-types.h"
#include "gimp-layer-modes.h"
#include "operations/layer-modes/gimpoperationlayermode.h"
/* static variables */
static const GimpLayerMode layer_mode_group_default[] =
{
GIMP_LAYER_MODE_NORMAL,
GIMP_LAYER_MODE_DISSOLVE,
GIMP_LAYER_MODE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_LUMINANCE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_SCREEN,
GIMP_LAYER_MODE_DODGE,
GIMP_LAYER_MODE_ADDITION,
GIMP_LAYER_MODE_DARKEN_ONLY,
GIMP_LAYER_MODE_LUMINANCE_DARKEN_ONLY,
GIMP_LAYER_MODE_MULTIPLY,
GIMP_LAYER_MODE_BURN,
GIMP_LAYER_MODE_OVERLAY,
GIMP_LAYER_MODE_SOFTLIGHT,
GIMP_LAYER_MODE_HARDLIGHT,
GIMP_LAYER_MODE_VIVID_LIGHT,
GIMP_LAYER_MODE_PIN_LIGHT,
GIMP_LAYER_MODE_LINEAR_LIGHT,
GIMP_LAYER_MODE_HARD_MIX,
GIMP_LAYER_MODE_DIFFERENCE,
GIMP_LAYER_MODE_SUBTRACT,
GIMP_LAYER_MODE_GRAIN_EXTRACT,
GIMP_LAYER_MODE_GRAIN_MERGE,
GIMP_LAYER_MODE_DIVIDE,
GIMP_LAYER_MODE_LCH_HUE,
GIMP_LAYER_MODE_LCH_CHROMA,
GIMP_LAYER_MODE_LCH_COLOR,
GIMP_LAYER_MODE_LCH_LIGHTNESS,
GIMP_LAYER_MODE_EXCLUSION,
GIMP_LAYER_MODE_LINEAR_BURN
};
static const GimpLayerMode layer_mode_group_linear[] =
{
GIMP_LAYER_MODE_NORMAL_LINEAR,
GIMP_LAYER_MODE_DISSOLVE,
GIMP_LAYER_MODE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_LUMINANCE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_SCREEN_LINEAR,
GIMP_LAYER_MODE_DODGE_LINEAR,
GIMP_LAYER_MODE_ADDITION_LINEAR,
GIMP_LAYER_MODE_DARKEN_ONLY,
GIMP_LAYER_MODE_LUMINANCE_DARKEN_ONLY,
GIMP_LAYER_MODE_MULTIPLY_LINEAR,
GIMP_LAYER_MODE_BURN_LINEAR,
GIMP_LAYER_MODE_OVERLAY_LINEAR,
GIMP_LAYER_MODE_SOFTLIGHT_LINEAR,
GIMP_LAYER_MODE_HARDLIGHT_LINEAR,
GIMP_LAYER_MODE_VIVID_LIGHT_LINEAR,
GIMP_LAYER_MODE_PIN_LIGHT_LINEAR,
GIMP_LAYER_MODE_LINEAR_LIGHT_LINEAR,
GIMP_LAYER_MODE_HARD_MIX_LINEAR,
GIMP_LAYER_MODE_DIFFERENCE_LINEAR,
GIMP_LAYER_MODE_SUBTRACT_LINEAR,
GIMP_LAYER_MODE_GRAIN_EXTRACT_LINEAR,
GIMP_LAYER_MODE_GRAIN_MERGE_LINEAR,
GIMP_LAYER_MODE_DIVIDE_LINEAR,
GIMP_LAYER_MODE_EXCLUSION_LINEAR,
GIMP_LAYER_MODE_LINEAR_BURN_LINEAR
};
static const GimpLayerMode layer_mode_group_perceptual[] =
{
GIMP_LAYER_MODE_NORMAL,
GIMP_LAYER_MODE_DISSOLVE,
GIMP_LAYER_MODE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_LUMA_LIGHTEN_ONLY,
GIMP_LAYER_MODE_SCREEN,
GIMP_LAYER_MODE_DODGE,
GIMP_LAYER_MODE_ADDITION,
GIMP_LAYER_MODE_DARKEN_ONLY,
GIMP_LAYER_MODE_LUMA_DARKEN_ONLY,
GIMP_LAYER_MODE_MULTIPLY,
GIMP_LAYER_MODE_BURN,
GIMP_LAYER_MODE_OVERLAY,
GIMP_LAYER_MODE_SOFTLIGHT,
GIMP_LAYER_MODE_HARDLIGHT,
GIMP_LAYER_MODE_VIVID_LIGHT,
GIMP_LAYER_MODE_PIN_LIGHT,
GIMP_LAYER_MODE_LINEAR_LIGHT,
GIMP_LAYER_MODE_HARD_MIX,
GIMP_LAYER_MODE_DIFFERENCE,
GIMP_LAYER_MODE_SUBTRACT,
GIMP_LAYER_MODE_GRAIN_EXTRACT,
GIMP_LAYER_MODE_GRAIN_MERGE,
GIMP_LAYER_MODE_DIVIDE,
GIMP_LAYER_MODE_HSV_HUE,
GIMP_LAYER_MODE_HSV_SATURATION,
GIMP_LAYER_MODE_HSV_COLOR,
GIMP_LAYER_MODE_HSV_VALUE,
GIMP_LAYER_MODE_LCH_HUE,
GIMP_LAYER_MODE_LCH_CHROMA,
GIMP_LAYER_MODE_LCH_COLOR,
GIMP_LAYER_MODE_LCH_LIGHTNESS,
GIMP_LAYER_MODE_EXCLUSION,
GIMP_LAYER_MODE_LINEAR_BURN
};
static const GimpLayerMode layer_mode_group_legacy[] =
{
GIMP_LAYER_MODE_NORMAL,
GIMP_LAYER_MODE_DISSOLVE,
GIMP_LAYER_MODE_LIGHTEN_ONLY_LEGACY,
GIMP_LAYER_MODE_SCREEN_LEGACY,
GIMP_LAYER_MODE_DODGE_LEGACY,
GIMP_LAYER_MODE_ADDITION_LEGACY,
GIMP_LAYER_MODE_DARKEN_ONLY_LEGACY,
GIMP_LAYER_MODE_MULTIPLY_LEGACY,
GIMP_LAYER_MODE_BURN_LEGACY,
GIMP_LAYER_MODE_SOFTLIGHT_LEGACY,
GIMP_LAYER_MODE_HARDLIGHT_LEGACY,
GIMP_LAYER_MODE_DIFFERENCE_LEGACY,
GIMP_LAYER_MODE_SUBTRACT_LEGACY,
GIMP_LAYER_MODE_GRAIN_EXTRACT_LEGACY,
GIMP_LAYER_MODE_GRAIN_MERGE_LEGACY,
GIMP_LAYER_MODE_DIVIDE_LEGACY,
GIMP_LAYER_MODE_HSV_HUE_LEGACY,
GIMP_LAYER_MODE_HSV_SATURATION_LEGACY,
GIMP_LAYER_MODE_HSV_COLOR_LEGACY,
GIMP_LAYER_MODE_HSV_VALUE_LEGACY
};
static const GimpLayerMode layer_mode_groups[][4] =
{
{
GIMP_LAYER_MODE_NORMAL,
GIMP_LAYER_MODE_NORMAL_LINEAR,
GIMP_LAYER_MODE_NORMAL,
GIMP_LAYER_MODE_NORMAL
},
{
GIMP_LAYER_MODE_DISSOLVE,
GIMP_LAYER_MODE_DISSOLVE,
GIMP_LAYER_MODE_DISSOLVE,
GIMP_LAYER_MODE_DISSOLVE
},
{
GIMP_LAYER_MODE_BEHIND,
GIMP_LAYER_MODE_BEHIND_LINEAR,
GIMP_LAYER_MODE_BEHIND,
GIMP_LAYER_MODE_BEHIND
},
{
GIMP_LAYER_MODE_MULTIPLY,
GIMP_LAYER_MODE_MULTIPLY_LINEAR,
GIMP_LAYER_MODE_MULTIPLY,
GIMP_LAYER_MODE_MULTIPLY_LEGACY
},
{
GIMP_LAYER_MODE_SCREEN,
GIMP_LAYER_MODE_SCREEN_LINEAR,
GIMP_LAYER_MODE_SCREEN,
GIMP_LAYER_MODE_SCREEN_LEGACY
},
{
GIMP_LAYER_MODE_OVERLAY,
GIMP_LAYER_MODE_OVERLAY_LINEAR,
GIMP_LAYER_MODE_OVERLAY,
-1
},
{
GIMP_LAYER_MODE_DIFFERENCE,
GIMP_LAYER_MODE_DIFFERENCE_LINEAR,
GIMP_LAYER_MODE_DIFFERENCE,
GIMP_LAYER_MODE_DIFFERENCE_LEGACY
},
{
GIMP_LAYER_MODE_ADDITION,
GIMP_LAYER_MODE_ADDITION_LINEAR,
GIMP_LAYER_MODE_ADDITION,
GIMP_LAYER_MODE_ADDITION_LEGACY
},
{
GIMP_LAYER_MODE_SUBTRACT,
GIMP_LAYER_MODE_SUBTRACT_LINEAR,
GIMP_LAYER_MODE_SUBTRACT,
GIMP_LAYER_MODE_SUBTRACT_LEGACY
},
{
GIMP_LAYER_MODE_DARKEN_ONLY,
GIMP_LAYER_MODE_DARKEN_ONLY,
GIMP_LAYER_MODE_DARKEN_ONLY,
GIMP_LAYER_MODE_DARKEN_ONLY_LEGACY
},
{
GIMP_LAYER_MODE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_LIGHTEN_ONLY_LEGACY
},
{
-1,
-1,
GIMP_LAYER_MODE_HSV_HUE,
GIMP_LAYER_MODE_HSV_HUE_LEGACY
},
{
-1,
-1,
GIMP_LAYER_MODE_HSV_SATURATION,
GIMP_LAYER_MODE_HSV_SATURATION_LEGACY
},
{
-1,
-1,
GIMP_LAYER_MODE_HSV_COLOR,
GIMP_LAYER_MODE_HSV_COLOR_LEGACY
},
{
-1,
-1,
GIMP_LAYER_MODE_HSV_VALUE,
GIMP_LAYER_MODE_HSV_VALUE_LEGACY
},
{
GIMP_LAYER_MODE_DIVIDE,
GIMP_LAYER_MODE_DIVIDE_LINEAR,
GIMP_LAYER_MODE_DIVIDE,
GIMP_LAYER_MODE_DIVIDE_LEGACY
},
{
GIMP_LAYER_MODE_DODGE,
GIMP_LAYER_MODE_DODGE_LINEAR,
GIMP_LAYER_MODE_DODGE,
GIMP_LAYER_MODE_DODGE_LEGACY
},
{
GIMP_LAYER_MODE_BURN,
GIMP_LAYER_MODE_BURN_LINEAR,
GIMP_LAYER_MODE_BURN,
GIMP_LAYER_MODE_BURN_LEGACY
},
{
GIMP_LAYER_MODE_HARDLIGHT,
GIMP_LAYER_MODE_HARDLIGHT_LINEAR,
GIMP_LAYER_MODE_HARDLIGHT,
GIMP_LAYER_MODE_HARDLIGHT_LEGACY
},
{
GIMP_LAYER_MODE_SOFTLIGHT,
GIMP_LAYER_MODE_SOFTLIGHT_LINEAR,
GIMP_LAYER_MODE_SOFTLIGHT,
GIMP_LAYER_MODE_SOFTLIGHT_LEGACY
},
{
GIMP_LAYER_MODE_GRAIN_EXTRACT,
GIMP_LAYER_MODE_GRAIN_EXTRACT_LINEAR,
GIMP_LAYER_MODE_GRAIN_EXTRACT,
GIMP_LAYER_MODE_GRAIN_EXTRACT_LEGACY
},
{
GIMP_LAYER_MODE_GRAIN_MERGE,
GIMP_LAYER_MODE_GRAIN_MERGE_LINEAR,
GIMP_LAYER_MODE_GRAIN_MERGE,
GIMP_LAYER_MODE_GRAIN_MERGE_LEGACY
},
{
GIMP_LAYER_MODE_COLOR_ERASE,
-1,
GIMP_LAYER_MODE_COLOR_ERASE,
-1,
},
{
GIMP_LAYER_MODE_VIVID_LIGHT,
GIMP_LAYER_MODE_VIVID_LIGHT_LINEAR,
GIMP_LAYER_MODE_VIVID_LIGHT,
-1
},
{
GIMP_LAYER_MODE_PIN_LIGHT,
GIMP_LAYER_MODE_PIN_LIGHT_LINEAR,
GIMP_LAYER_MODE_PIN_LIGHT,
-1
},
{
GIMP_LAYER_MODE_LINEAR_LIGHT,
GIMP_LAYER_MODE_LINEAR_LIGHT_LINEAR,
GIMP_LAYER_MODE_LINEAR_LIGHT,
-1
},
{
GIMP_LAYER_MODE_HARD_MIX,
GIMP_LAYER_MODE_HARD_MIX_LINEAR,
GIMP_LAYER_MODE_HARD_MIX,
-1
},
{
GIMP_LAYER_MODE_EXCLUSION,
GIMP_LAYER_MODE_EXCLUSION_LINEAR,
GIMP_LAYER_MODE_EXCLUSION,
-1
},
{
GIMP_LAYER_MODE_LINEAR_BURN,
GIMP_LAYER_MODE_LINEAR_BURN_LINEAR,
GIMP_LAYER_MODE_LINEAR_BURN,
-1
},
{
GIMP_LAYER_MODE_LUMINANCE_DARKEN_ONLY,
GIMP_LAYER_MODE_LUMINANCE_DARKEN_ONLY,
GIMP_LAYER_MODE_LUMA_DARKEN_ONLY,
-1
},
{
GIMP_LAYER_MODE_LUMINANCE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_LUMINANCE_LIGHTEN_ONLY,
GIMP_LAYER_MODE_LUMA_LIGHTEN_ONLY,
-1
},
{
GIMP_LAYER_MODE_ERASE,
GIMP_LAYER_MODE_ERASE,
-1,
-1
},
{
GIMP_LAYER_MODE_REPLACE,
GIMP_LAYER_MODE_REPLACE,
-1,
-1
},
{
GIMP_LAYER_MODE_ANTI_ERASE,
GIMP_LAYER_MODE_ANTI_ERASE,
-1,
-1
},
};
/* public functions */
gboolean
gimp_layer_mode_is_legacy (GimpLayerMode mode)
{
const GimpLayerModeInfo *info = gimp_layer_mode_info (mode);
if (!info)
return FALSE;
return (info->flags & GIMP_LAYER_MODE_FLAG_LEGACY) != 0;
}
gboolean
gimp_layer_mode_wants_linear_data (GimpLayerMode mode)
{
const GimpLayerModeInfo *info = gimp_layer_mode_info (mode);
if (!info)
return FALSE;
return (info->flags & GIMP_LAYER_MODE_FLAG_WANTS_LINEAR_DATA) != 0;
}
GimpLayerColorSpace
gimp_layer_mode_get_blend_space (GimpLayerMode mode)
{
const GimpLayerModeInfo *info = gimp_layer_mode_info (mode);
if (!info)
return GIMP_LAYER_COLOR_SPACE_RGB_LINEAR;
return info->blend_space;
}
GimpLayerColorSpace
gimp_layer_mode_get_composite_space (GimpLayerMode mode)
{
const GimpLayerModeInfo *info = gimp_layer_mode_info (mode);
if (!info)
return GIMP_LAYER_COLOR_SPACE_RGB_LINEAR;
return info->composite_space;
}
GimpLayerCompositeMode
gimp_layer_mode_get_composite_mode (GimpLayerMode mode)
{
const GimpLayerModeInfo *info = gimp_layer_mode_info (mode);
if (!info)
return GIMP_LAYER_COMPOSITE_SRC_OVER;
return info->composite_mode;
}
const gchar *
gimp_layer_mode_get_operation (GimpLayerMode mode)
{
const GimpLayerModeInfo *info = gimp_layer_mode_info (mode);
if (!info)
return "gimp:layer-mode";
return info->op_name;
}
static gboolean
is_mode_in_array (const GimpLayerMode *modes,
gint n_modes,
GimpLayerMode mode)
{
gint i;
for (i = 0; i < n_modes; i++)
if (modes[i] == mode)
return TRUE;
return FALSE;
}
GimpLayerModeGroup
gimp_layer_mode_get_group (GimpLayerMode mode)
{
if (is_mode_in_array (layer_mode_group_default,
G_N_ELEMENTS (layer_mode_group_default), mode))
{
return GIMP_LAYER_MODE_GROUP_DEFAULT;
}
else if (is_mode_in_array (layer_mode_group_linear,
G_N_ELEMENTS (layer_mode_group_linear), mode))
{
return GIMP_LAYER_MODE_GROUP_LINEAR;
}
else if (is_mode_in_array (layer_mode_group_perceptual,
G_N_ELEMENTS (layer_mode_group_perceptual), mode))
{
return GIMP_LAYER_MODE_GROUP_PERCEPTUAL;
}
else if (is_mode_in_array (layer_mode_group_legacy,
G_N_ELEMENTS (layer_mode_group_legacy), mode))
{
return GIMP_LAYER_MODE_GROUP_LEGACY;
}
return GIMP_LAYER_MODE_GROUP_DEFAULT;
}
const GimpLayerMode *
gimp_layer_mode_get_group_array (GimpLayerModeGroup group,
gint *n_modes)
{
g_return_val_if_fail (n_modes != NULL, NULL);
switch (group)
{
case GIMP_LAYER_MODE_GROUP_DEFAULT:
*n_modes = G_N_ELEMENTS (layer_mode_group_default);
return layer_mode_group_default;
case GIMP_LAYER_MODE_GROUP_LINEAR:
*n_modes = G_N_ELEMENTS (layer_mode_group_linear);
return layer_mode_group_linear;
case GIMP_LAYER_MODE_GROUP_PERCEPTUAL:
*n_modes = G_N_ELEMENTS (layer_mode_group_perceptual);
return layer_mode_group_perceptual;
case GIMP_LAYER_MODE_GROUP_LEGACY:
*n_modes = G_N_ELEMENTS (layer_mode_group_legacy);
return layer_mode_group_legacy;
default:
g_return_val_if_reached (NULL);
}
}
gboolean
gimp_layer_mode_get_for_group (GimpLayerMode old_mode,
GimpLayerModeGroup new_group,
GimpLayerMode *new_mode)
{
gint i;
g_return_val_if_fail (new_mode != NULL, FALSE);
for (i = 0; i < G_N_ELEMENTS (layer_mode_groups); i++)
{
if (is_mode_in_array (layer_mode_groups[i], 4, old_mode))
{
*new_mode = layer_mode_groups[i][new_group];
if (*new_mode != -1)
return TRUE;
return FALSE;
}
}
*new_mode = -1;
return FALSE;
}
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