40c0ea4fe1
Most modes only modify the *color* of overlapping dest/src regions, however, erase and color-erase may also reduce their *alpha*, i.e., eliminate some of the overlapping content. Flag these modes with the new SUBTRACTIVE flag, as they require more general compositing code. The next commit adds the said code.
68 lines
3.4 KiB
C
68 lines
3.4 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimp-layer-modes.h
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* Copyright (C) 2017 Michael Natterer <mitch@gimp.org>
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* Øyvind Kolås <pippin@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GIMP_LAYER_MODES_H__
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#define __GIMP_LAYER_MODES_H__
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void gimp_layer_modes_init (void);
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gboolean gimp_layer_mode_is_legacy (GimpLayerMode mode);
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gboolean gimp_layer_mode_is_blend_space_mutable (GimpLayerMode mode);
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gboolean gimp_layer_mode_is_composite_space_mutable (GimpLayerMode mode);
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gboolean gimp_layer_mode_is_composite_mode_mutable (GimpLayerMode mode);
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gboolean gimp_layer_mode_is_subtractive (GimpLayerMode mode);
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GimpLayerColorSpace gimp_layer_mode_get_blend_space (GimpLayerMode mode);
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GimpLayerColorSpace gimp_layer_mode_get_composite_space (GimpLayerMode mode);
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GimpLayerCompositeMode gimp_layer_mode_get_composite_mode (GimpLayerMode mode);
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GimpLayerCompositeMode gimp_layer_mode_get_paint_composite_mode
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(GimpLayerMode mode);
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const gchar * gimp_layer_mode_get_operation (GimpLayerMode mode);
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GimpLayerModeFunc gimp_layer_mode_get_function (GimpLayerMode mode);
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GimpLayerModeContext gimp_layer_mode_get_context (GimpLayerMode mode);
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GimpLayerMode * gimp_layer_mode_get_context_array (GimpLayerMode mode,
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GimpLayerModeContext context,
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gint *n_modes);
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GimpLayerModeGroup gimp_layer_mode_get_group (GimpLayerMode mode);
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const GimpLayerMode * gimp_layer_mode_get_group_array (GimpLayerModeGroup group,
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gint *n_modes);
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gboolean gimp_layer_mode_get_for_group (GimpLayerMode old_mode,
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GimpLayerModeGroup new_group,
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GimpLayerMode *new_mode);
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const Babl * gimp_layer_mode_get_format (GimpLayerMode mode,
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GimpLayerColorSpace composite_space,
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GimpLayerColorSpace blend_space,
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const Babl *preferred_format);
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#endif /* __GIMP_LAYER_MODES_H__ */
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