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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
commit | 5c1676dfe6d2f3c837a5e074117b45613fd29a72 (patch) | |
tree | cbffb45144febf451e54061db2b21395faf94bfe /app/core/gimppickable.c | |
parent | Initial commit. (diff) | |
download | gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.tar.xz gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.zip |
Adding upstream version 2.10.34.upstream/2.10.34upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | app/core/gimppickable.c | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/app/core/gimppickable.c b/app/core/gimppickable.c new file mode 100644 index 0000000..2949def --- /dev/null +++ b/app/core/gimppickable.c @@ -0,0 +1,378 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimppickable.c + * Copyright (C) 2004 Michael Natterer <mitch@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 <https://www.gnu.org/licenses/>. + */ + +/* This file contains an interface for pixel objects that their color at + * a given position can be picked. Also included is a utility for + * sampling an average area (which uses the implemented picking + * functions). + */ + +#include "config.h" + +#include <string.h> + +#include <cairo.h> +#include <gegl.h> +#include <gdk-pixbuf/gdk-pixbuf.h> + +#include "libgimpcolor/gimpcolor.h" +#include "libgimpmath/gimpmath.h" + +#include "core-types.h" + +#include "gimpobject.h" +#include "gimpimage.h" +#include "gimppickable.h" + + +/* local function prototypes */ + +static void gimp_pickable_real_get_pixel_average (GimpPickable *pickable, + const GeglRectangle *rect, + const Babl *format, + gpointer pixel); + + +G_DEFINE_INTERFACE (GimpPickable, gimp_pickable, GIMP_TYPE_OBJECT) + + +/* private functions */ + + +static void +gimp_pickable_default_init (GimpPickableInterface *iface) +{ + iface->get_pixel_average = gimp_pickable_real_get_pixel_average; + + g_object_interface_install_property (iface, + g_param_spec_object ("buffer", + NULL, NULL, + GEGL_TYPE_BUFFER, + GIMP_PARAM_READABLE)); +} + +static void +gimp_pickable_real_get_pixel_average (GimpPickable *pickable, + const GeglRectangle *rect, + const Babl *format, + gpointer pixel) +{ + const Babl *average_format = babl_format ("RaGaBaA double"); + gdouble average[4] = {}; + gint n = 0; + gint x; + gint y; + gint c; + + for (y = rect->y; y < rect->y + rect->height; y++) + { + for (x = rect->x; x < rect->x + rect->width; x++) + { + gdouble sample[4]; + + if (gimp_pickable_get_pixel_at (pickable, + x, y, average_format, sample)) + { + for (c = 0; c < 4; c++) + average[c] += sample[c]; + + n++; + } + } + } + + if (n > 0) + { + for (c = 0; c < 4; c++) + average[c] /= n; + } + + babl_process (babl_fish (average_format, format), average, pixel, 1); +} + + +/* public functions */ + + +void +gimp_pickable_flush (GimpPickable *pickable) +{ + GimpPickableInterface *pickable_iface; + + g_return_if_fail (GIMP_IS_PICKABLE (pickable)); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->flush) + pickable_iface->flush (pickable); +} + +GimpImage * +gimp_pickable_get_image (GimpPickable *pickable) +{ + GimpPickableInterface *pickable_iface; + + g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->get_image) + return pickable_iface->get_image (pickable); + + return NULL; +} + +const Babl * +gimp_pickable_get_format (GimpPickable *pickable) +{ + GimpPickableInterface *pickable_iface; + + g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->get_format) + return pickable_iface->get_format (pickable); + + return NULL; +} + +const Babl * +gimp_pickable_get_format_with_alpha (GimpPickable *pickable) +{ + GimpPickableInterface *pickable_iface; + + g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->get_format_with_alpha) + return pickable_iface->get_format_with_alpha (pickable); + + return NULL; +} + +GeglBuffer * +gimp_pickable_get_buffer (GimpPickable *pickable) +{ + GimpPickableInterface *pickable_iface; + + g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->get_buffer) + return pickable_iface->get_buffer (pickable); + + return NULL; +} + +gboolean +gimp_pickable_get_pixel_at (GimpPickable *pickable, + gint x, + gint y, + const Babl *format, + gpointer pixel) +{ + GimpPickableInterface *pickable_iface; + + g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), FALSE); + g_return_val_if_fail (pixel != NULL, FALSE); + + if (! format) + format = gimp_pickable_get_format (pickable); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->get_pixel_at) + return pickable_iface->get_pixel_at (pickable, x, y, format, pixel); + + return FALSE; +} + +void +gimp_pickable_get_pixel_average (GimpPickable *pickable, + const GeglRectangle *rect, + const Babl *format, + gpointer pixel) +{ + GimpPickableInterface *pickable_iface; + + g_return_if_fail (GIMP_IS_PICKABLE (pickable)); + g_return_if_fail (rect != NULL); + g_return_if_fail (pixel != NULL); + + if (! format) + format = gimp_pickable_get_format (pickable); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->get_pixel_average) + pickable_iface->get_pixel_average (pickable, rect, format, pixel); + else + memset (pixel, 0, babl_format_get_bytes_per_pixel (format)); +} + +gboolean +gimp_pickable_get_color_at (GimpPickable *pickable, + gint x, + gint y, + GimpRGB *color) +{ + gdouble pixel[4]; + + g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), FALSE); + g_return_val_if_fail (color != NULL, FALSE); + + if (! gimp_pickable_get_pixel_at (pickable, x, y, NULL, pixel)) + return FALSE; + + gimp_pickable_pixel_to_srgb (pickable, NULL, pixel, color); + + return TRUE; +} + +gdouble +gimp_pickable_get_opacity_at (GimpPickable *pickable, + gint x, + gint y) +{ + GimpPickableInterface *pickable_iface; + + g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), GIMP_OPACITY_TRANSPARENT); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->get_opacity_at) + return pickable_iface->get_opacity_at (pickable, x, y); + + return GIMP_OPACITY_TRANSPARENT; +} + +void +gimp_pickable_pixel_to_srgb (GimpPickable *pickable, + const Babl *format, + gpointer pixel, + GimpRGB *color) +{ + GimpPickableInterface *pickable_iface; + + g_return_if_fail (GIMP_IS_PICKABLE (pickable)); + g_return_if_fail (pixel != NULL); + g_return_if_fail (color != NULL); + + if (! format) + format = gimp_pickable_get_format (pickable); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->pixel_to_srgb) + { + pickable_iface->pixel_to_srgb (pickable, format, pixel, color); + } + else + { + gimp_rgba_set_pixel (color, format, pixel); + } +} + +void +gimp_pickable_srgb_to_pixel (GimpPickable *pickable, + const GimpRGB *color, + const Babl *format, + gpointer pixel) +{ + GimpPickableInterface *pickable_iface; + + g_return_if_fail (GIMP_IS_PICKABLE (pickable)); + g_return_if_fail (color != NULL); + g_return_if_fail (pixel != NULL); + + if (! format) + format = gimp_pickable_get_format (pickable); + + pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable); + + if (pickable_iface->srgb_to_pixel) + { + pickable_iface->srgb_to_pixel (pickable, color, format, pixel); + } + else + { + gimp_rgba_get_pixel (color, format, pixel); + } +} + +void +gimp_pickable_srgb_to_image_color (GimpPickable *pickable, + const GimpRGB *color, + GimpRGB *image_color) +{ + g_return_if_fail (GIMP_IS_PICKABLE (pickable)); + g_return_if_fail (color != NULL); + g_return_if_fail (image_color != NULL); + + gimp_pickable_srgb_to_pixel (pickable, + color, + babl_format ("R'G'B'A double"), + image_color); +} + +gboolean +gimp_pickable_pick_color (GimpPickable *pickable, + gint x, + gint y, + gboolean sample_average, + gdouble average_radius, + gpointer pixel, + GimpRGB *color) +{ + const Babl *format; + gdouble sample[4]; + + g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), FALSE); + g_return_val_if_fail (color != NULL, FALSE); + + format = gimp_pickable_get_format (pickable); + + if (! gimp_pickable_get_pixel_at (pickable, x, y, format, sample)) + return FALSE; + + if (pixel) + memcpy (pixel, sample, babl_format_get_bytes_per_pixel (format)); + + if (sample_average) + { + gint radius = floor (average_radius); + + format = babl_format ("RaGaBaA double"); + + gimp_pickable_get_pixel_average (pickable, + GEGL_RECTANGLE (x - radius, + y - radius, + 2 * radius + 1, + 2 * radius + 1), + format, sample); + } + + gimp_pickable_pixel_to_srgb (pickable, format, sample, color); + + return TRUE; +} |