From 3c57dd931145d43f2b0aef96c4d178135956bf91 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 05:13:10 +0200 Subject: Adding upstream version 2.10.36. Signed-off-by: Daniel Baumann --- app/core/gimpchannel-combine.c | 471 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 471 insertions(+) create mode 100644 app/core/gimpchannel-combine.c (limited to 'app/core/gimpchannel-combine.c') diff --git a/app/core/gimpchannel-combine.c b/app/core/gimpchannel-combine.c new file mode 100644 index 0000000..8326f65 --- /dev/null +++ b/app/core/gimpchannel-combine.c @@ -0,0 +1,471 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * 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 . + */ + +#include "config.h" + +#include + +#include +#include + +#include "libgimpbase/gimpbase.h" +#include "libgimpmath/gimpmath.h" + +#include "core-types.h" + +#include "gegl/gimp-gegl-mask-combine.h" + +#include "gimpchannel.h" +#include "gimpchannel-combine.h" + + +typedef struct +{ + GeglRectangle rect; + + gboolean bounds_known; + gboolean empty; + GeglRectangle bounds; +} GimpChannelCombineData; + + +/* local function prototypes */ + +static void gimp_channel_combine_clear (GimpChannel *mask, + const GeglRectangle *rect); +static void gimp_channel_combine_clear_complement (GimpChannel *mask, + const GeglRectangle *rect); + +static gboolean gimp_channel_combine_start (GimpChannel *mask, + GimpChannelOps op, + const GeglRectangle *rect, + gboolean full_extent, + gboolean full_value, + GimpChannelCombineData *data); +static void gimp_channel_combine_end (GimpChannel *mask, + GimpChannelCombineData *data); + + +/* private functions */ + +static void +gimp_channel_combine_clear (GimpChannel *mask, + const GeglRectangle *rect) +{ + GeglBuffer *buffer; + GeglRectangle area; + GeglRectangle update_area; + + if (mask->bounds_known && mask->empty) + return; + + buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)); + + if (rect) + { + if (rect->width <= 0 || rect->height <= 0) + return; + + if (mask->bounds_known) + { + if (! gegl_rectangle_intersect (&area, + GEGL_RECTANGLE (mask->x1, + mask->y1, + mask->x2 - mask->x1, + mask->y2 - mask->y1), + rect)) + { + return; + } + } + else + { + area = *rect; + } + + update_area = area; + } + else + { + if (mask->bounds_known) + { + area.x = mask->x1; + area.y = mask->y1; + area.width = mask->x2 - mask->x1; + area.height = mask->y2 - mask->y1; + } + else + { + area.x = 0; + area.y = 0; + area.width = gimp_item_get_width (GIMP_ITEM (mask)); + area.height = gimp_item_get_height (GIMP_ITEM (mask)); + } + + update_area = area; + + gegl_rectangle_align_to_buffer (&area, &area, buffer, + GEGL_RECTANGLE_ALIGNMENT_SUPERSET); + } + + gegl_buffer_clear (buffer, &area); + + gimp_drawable_update (GIMP_DRAWABLE (mask), + update_area.x, update_area.y, + update_area.width, update_area.height); +} + +static void +gimp_channel_combine_clear_complement (GimpChannel *mask, + const GeglRectangle *rect) +{ + gint width = gimp_item_get_width (GIMP_ITEM (mask)); + gint height = gimp_item_get_height (GIMP_ITEM (mask)); + + gimp_channel_combine_clear ( + mask, + GEGL_RECTANGLE (0, + 0, + width, + rect->y)); + + gimp_channel_combine_clear ( + mask, + GEGL_RECTANGLE (0, + rect->y + rect->height, + width, + height - (rect->y + rect->height))); + + gimp_channel_combine_clear ( + mask, + GEGL_RECTANGLE (0, + rect->y, + rect->x, + rect->height)); + + gimp_channel_combine_clear ( + mask, + GEGL_RECTANGLE (rect->x + rect->width, + rect->y, + width - (rect->x + rect->width), + rect->height)); +} + +static gboolean +gimp_channel_combine_start (GimpChannel *mask, + GimpChannelOps op, + const GeglRectangle *rect, + gboolean full_extent, + gboolean full_value, + GimpChannelCombineData *data) +{ + GeglBuffer *buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)); + GeglRectangle extent; + gboolean intersects; + + extent.x = 0; + extent.y = 0; + extent.width = gimp_item_get_width (GIMP_ITEM (mask)); + extent.height = gimp_item_get_height (GIMP_ITEM (mask)); + + intersects = gegl_rectangle_intersect (&data->rect, rect, &extent); + + data->bounds_known = mask->bounds_known; + data->empty = mask->empty; + + data->bounds.x = mask->x1; + data->bounds.y = mask->y1; + data->bounds.width = mask->x2 - mask->x1; + data->bounds.height = mask->y2 - mask->y1; + + gegl_buffer_freeze_changed (buffer); + + /* Determine new boundary */ + switch (op) + { + case GIMP_CHANNEL_OP_REPLACE: + gimp_channel_combine_clear (mask, NULL); + + if (! intersects) + { + data->bounds_known = TRUE; + data->empty = TRUE; + + return FALSE; + } + + data->bounds_known = FALSE; + + if (full_extent) + { + data->bounds_known = TRUE; + data->empty = FALSE; + data->bounds = data->rect; + } + break; + + case GIMP_CHANNEL_OP_ADD: + if (! intersects) + return FALSE; + + data->bounds_known = FALSE; + + if (full_extent && (mask->bounds_known || + gegl_rectangle_equal (&data->rect, &extent))) + { + data->bounds_known = TRUE; + data->empty = FALSE; + + if (mask->bounds_known && ! mask->empty) + { + gegl_rectangle_bounding_box (&data->bounds, + &data->bounds, &data->rect); + } + else + { + data->bounds = data->rect; + } + } + break; + + case GIMP_CHANNEL_OP_SUBTRACT: + if (intersects && mask->bounds_known) + { + if (mask->empty) + { + intersects = FALSE; + } + else + { + intersects = gegl_rectangle_intersect (&data->rect, + &data->rect, + &data->bounds); + } + } + + if (! intersects) + return FALSE; + + if (full_value && + gegl_rectangle_contains (&data->rect, + mask->bounds_known ? &data->bounds : + &extent)) + { + gimp_channel_combine_clear (mask, NULL); + + data->bounds_known = TRUE; + data->empty = TRUE; + + return FALSE; + } + + data->bounds_known = FALSE; + + gegl_buffer_set_abyss (buffer, &data->rect); + break; + + case GIMP_CHANNEL_OP_INTERSECT: + if (intersects && mask->bounds_known) + { + if (mask->empty) + { + intersects = FALSE; + } + else + { + intersects = gegl_rectangle_intersect (&data->rect, + &data->rect, + &data->bounds); + } + } + + if (! intersects) + { + gimp_channel_combine_clear (mask, NULL); + + data->bounds_known = TRUE; + data->empty = TRUE; + + return FALSE; + } + + if (full_value && mask->bounds_known && + gegl_rectangle_contains (&data->rect, &data->bounds)) + { + return FALSE; + } + + data->bounds_known = FALSE; + + gimp_channel_combine_clear_complement (mask, &data->rect); + + gegl_buffer_set_abyss (buffer, &data->rect); + break; + } + + return TRUE; +} + +static void +gimp_channel_combine_end (GimpChannel *mask, + GimpChannelCombineData *data) +{ + GeglBuffer *buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)); + + gegl_buffer_set_abyss (buffer, gegl_buffer_get_extent (buffer)); + + gegl_buffer_thaw_changed (buffer); + + mask->bounds_known = data->bounds_known; + + if (data->bounds_known) + { + mask->empty = data->empty; + + if (data->empty) + { + mask->x1 = 0; + mask->y1 = 0; + mask->x2 = gimp_item_get_width (GIMP_ITEM (mask)); + mask->y2 = gimp_item_get_height (GIMP_ITEM (mask)); + } + else + { + mask->x1 = data->bounds.x; + mask->y1 = data->bounds.y; + mask->x2 = data->bounds.x + data->bounds.width; + mask->y2 = data->bounds.y + data->bounds.height; + } + } + + gimp_drawable_update (GIMP_DRAWABLE (mask), + data->rect.x, data->rect.y, + data->rect.width, data->rect.height); +} + + +/* public functions */ + +void +gimp_channel_combine_rect (GimpChannel *mask, + GimpChannelOps op, + gint x, + gint y, + gint w, + gint h) +{ + GimpChannelCombineData data; + + g_return_if_fail (GIMP_IS_CHANNEL (mask)); + + if (gimp_channel_combine_start (mask, op, GEGL_RECTANGLE (x, y, w, h), + TRUE, TRUE, &data)) + { + GeglBuffer *buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)); + + gimp_gegl_mask_combine_rect (buffer, op, x, y, w, h); + } + + gimp_channel_combine_end (mask, &data); +} + +void +gimp_channel_combine_ellipse (GimpChannel *mask, + GimpChannelOps op, + gint x, + gint y, + gint w, + gint h, + gboolean antialias) +{ + gimp_channel_combine_ellipse_rect (mask, op, x, y, w, h, + w / 2.0, h / 2.0, antialias); +} + +void +gimp_channel_combine_ellipse_rect (GimpChannel *mask, + GimpChannelOps op, + gint x, + gint y, + gint w, + gint h, + gdouble rx, + gdouble ry, + gboolean antialias) +{ + GimpChannelCombineData data; + + g_return_if_fail (GIMP_IS_CHANNEL (mask)); + + if (gimp_channel_combine_start (mask, op, GEGL_RECTANGLE (x, y, w, h), + TRUE, FALSE, &data)) + { + GeglBuffer *buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)); + + gimp_gegl_mask_combine_ellipse_rect (buffer, op, x, y, w, h, + rx, ry, antialias); + } + + gimp_channel_combine_end (mask, &data); +} + +void +gimp_channel_combine_mask (GimpChannel *mask, + GimpChannel *add_on, + GimpChannelOps op, + gint off_x, + gint off_y) +{ + GeglBuffer *add_on_buffer; + + g_return_if_fail (GIMP_IS_CHANNEL (mask)); + g_return_if_fail (GIMP_IS_CHANNEL (add_on)); + + add_on_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (add_on)); + + gimp_channel_combine_buffer (mask, add_on_buffer, + op, off_x, off_y); +} + +void +gimp_channel_combine_buffer (GimpChannel *mask, + GeglBuffer *add_on_buffer, + GimpChannelOps op, + gint off_x, + gint off_y) +{ + GimpChannelCombineData data; + + g_return_if_fail (GIMP_IS_CHANNEL (mask)); + g_return_if_fail (GEGL_IS_BUFFER (add_on_buffer)); + + if (gimp_channel_combine_start (mask, op, + GEGL_RECTANGLE ( + off_x + gegl_buffer_get_x (add_on_buffer), + off_y + gegl_buffer_get_y (add_on_buffer), + gegl_buffer_get_width (add_on_buffer), + gegl_buffer_get_height (add_on_buffer)), + FALSE, FALSE, &data)) + { + GeglBuffer *buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)); + + gimp_gegl_mask_combine_buffer (buffer, add_on_buffer, op, + off_x, off_y); + } + + gimp_channel_combine_end (mask, &data); +} -- cgit v1.2.3