From 5c1676dfe6d2f3c837a5e074117b45613fd29a72 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:30:19 +0200 Subject: Adding upstream version 2.10.34. Signed-off-by: Daniel Baumann --- app/tools/gimptilehandleriscissors.c | 331 +++++++++++++++++++++++++++++++++++ 1 file changed, 331 insertions(+) create mode 100644 app/tools/gimptilehandleriscissors.c (limited to 'app/tools/gimptilehandleriscissors.c') diff --git a/app/tools/gimptilehandleriscissors.c b/app/tools/gimptilehandleriscissors.c new file mode 100644 index 0000000..63e434a --- /dev/null +++ b/app/tools/gimptilehandleriscissors.c @@ -0,0 +1,331 @@ +/* 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 "libgimpmath/gimpmath.h" + +#include "tools-types.h" + +#include "gegl/gimp-gegl-loops.h" + +#include "core/gimppickable.h" + +#include "gimptilehandleriscissors.h" + + +enum +{ + PROP_0, + PROP_PICKABLE +}; + + +static void gimp_tile_handler_iscissors_finalize (GObject *object); +static void gimp_tile_handler_iscissors_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_tile_handler_iscissors_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); + +static void gimp_tile_handler_iscissors_validate (GimpTileHandlerValidate *validate, + const GeglRectangle *rect, + const Babl *format, + gpointer dest_buf, + gint dest_stride); + + +G_DEFINE_TYPE (GimpTileHandlerIscissors, gimp_tile_handler_iscissors, + GIMP_TYPE_TILE_HANDLER_VALIDATE) + +#define parent_class gimp_tile_handler_iscissors_parent_class + + +static void +gimp_tile_handler_iscissors_class_init (GimpTileHandlerIscissorsClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpTileHandlerValidateClass *validate_class; + + validate_class = GIMP_TILE_HANDLER_VALIDATE_CLASS (klass); + + object_class->finalize = gimp_tile_handler_iscissors_finalize; + object_class->set_property = gimp_tile_handler_iscissors_set_property; + object_class->get_property = gimp_tile_handler_iscissors_get_property; + + validate_class->validate = gimp_tile_handler_iscissors_validate; + + g_object_class_install_property (object_class, PROP_PICKABLE, + g_param_spec_object ("pickable", NULL, NULL, + GIMP_TYPE_PICKABLE, + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT_ONLY)); +} + +static void +gimp_tile_handler_iscissors_init (GimpTileHandlerIscissors *iscissors) +{ +} + +static void +gimp_tile_handler_iscissors_finalize (GObject *object) +{ + GimpTileHandlerIscissors *iscissors = GIMP_TILE_HANDLER_ISCISSORS (object); + + if (iscissors->pickable) + { + g_object_unref (iscissors->pickable); + iscissors->pickable = NULL; + } + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +gimp_tile_handler_iscissors_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpTileHandlerIscissors *iscissors = GIMP_TILE_HANDLER_ISCISSORS (object); + + switch (property_id) + { + case PROP_PICKABLE: + iscissors->pickable = g_value_dup_object (value); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_tile_handler_iscissors_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpTileHandlerIscissors *iscissors = GIMP_TILE_HANDLER_ISCISSORS (object); + + switch (property_id) + { + case PROP_PICKABLE: + g_value_set_object (value, iscissors->pickable); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static const gfloat horz_deriv[9] = +{ + 1, 0, -1, + 2, 0, -2, + 1, 0, -1, +}; + +static const gfloat vert_deriv[9] = +{ + 1, 2, 1, + 0, 0, 0, + -1, -2, -1, +}; + +static const gfloat blur_32[9] = +{ + 1, 1, 1, + 1, 24, 1, + 1, 1, 1, +}; + +#define MAX_GRADIENT 179.606 /* == sqrt (127^2 + 127^2) */ +#define MIN_GRADIENT 63 /* gradients < this are directionless */ +#define COST_WIDTH 2 /* number of bytes for each pixel in cost map */ + +static void +gimp_tile_handler_iscissors_validate (GimpTileHandlerValidate *validate, + const GeglRectangle *rect, + const Babl *format, + gpointer dest_buf, + gint dest_stride) +{ + GimpTileHandlerIscissors *iscissors = GIMP_TILE_HANDLER_ISCISSORS (validate); + GeglBuffer *src; + GeglBuffer *temp0; + GeglBuffer *temp1; + GeglBuffer *temp2; + gint stride1; + gint stride2; + gint i, j; + + /* temporary convolution buffers -- */ + guchar *maxgrad_conv1; + guchar *maxgrad_conv2; + +#if 0 + g_printerr ("validating at %d %d %d %d\n", + rect->x, + rect->y, + rect->width, + rect->height); +#endif + + gimp_pickable_flush (iscissors->pickable); + + src = gimp_pickable_get_buffer (iscissors->pickable); + + temp0 = gegl_buffer_new (GEGL_RECTANGLE (0, 0, + rect->width, + rect->height), + babl_format ("R'G'B'A u8")); + + temp1 = gegl_buffer_new (GEGL_RECTANGLE (0, 0, + rect->width, + rect->height), + babl_format ("R'G'B'A u8")); + + temp2 = gegl_buffer_new (GEGL_RECTANGLE (0, 0, + rect->width, + rect->height), + babl_format ("R'G'B'A u8")); + + /* XXX tile edges? */ + + /* Blur the source to get rid of noise */ + gimp_gegl_convolve (src, rect, + temp0, GEGL_RECTANGLE (0, 0, rect->width, rect->height), + blur_32, 3, 32, GIMP_NORMAL_CONVOL, FALSE); + + /* Use this blurred region as the new source */ + + /* Get the horizontal derivative */ + gimp_gegl_convolve (temp0, GEGL_RECTANGLE (0, 0, rect->width, rect->height), + temp1, GEGL_RECTANGLE (0, 0, rect->width, rect->height), + horz_deriv, 3, 1, GIMP_NEGATIVE_CONVOL, FALSE); + + /* Get the vertical derivative */ + gimp_gegl_convolve (temp0, GEGL_RECTANGLE (0, 0, rect->width, rect->height), + temp2, GEGL_RECTANGLE (0, 0, rect->width, rect->height), + vert_deriv, 3, 1, GIMP_NEGATIVE_CONVOL, FALSE); + + maxgrad_conv1 = + (guchar *) gegl_buffer_linear_open (temp1, + GEGL_RECTANGLE (0, 0, + rect->width, + rect->height), + &stride1, NULL); + + maxgrad_conv2 = + (guchar *) gegl_buffer_linear_open (temp2, + GEGL_RECTANGLE (0, 0, + rect->width, + rect->height), + &stride2, NULL); + + /* calculate overall gradient */ + + for (i = 0; i < rect->height; i++) + { + const guint8 *datah = maxgrad_conv1 + stride1 * i; + const guint8 *datav = maxgrad_conv2 + stride2 * i; + guint8 *gradmap = (guint8 *) dest_buf + dest_stride * i; + + for (j = 0; j < rect->width; j++) + { + gint8 hmax = datah[0] - 128; + gint8 vmax = datav[0] - 128; + gfloat gradient; + gint b; + + for (b = 1; b < 4; b++) + { + if (abs (datah[b] - 128) > abs (hmax)) + hmax = datah[b] - 128; + + if (abs (datav[b] - 128) > abs (vmax)) + vmax = datav[b] - 128; + } + + if (i == 0 || j == 0 || i == rect->height - 1 || j == rect->width - 1) + { + gradmap[j * COST_WIDTH + 0] = 0; + gradmap[j * COST_WIDTH + 1] = 255; + goto contin; + } + + /* 1 byte absolute magnitude first */ + gradient = sqrt (SQR (hmax) + SQR (vmax)); + gradmap[j * COST_WIDTH] = gradient * 255 / MAX_GRADIENT; + + /* then 1 byte direction */ + if (gradient > MIN_GRADIENT) + { + gfloat direction; + + if (! hmax) + direction = (vmax > 0) ? G_PI_2 : -G_PI_2; + else + direction = atan ((gdouble) vmax / (gdouble) hmax); + + /* Scale the direction from between 0 and 254, + * corresponding to -PI/2, PI/2 255 is reserved for + * directionless pixels + */ + gradmap[j * COST_WIDTH + 1] = + (guint8) (254 * (direction + G_PI_2) / G_PI); + } + else + { + gradmap[j * COST_WIDTH + 1] = 255; /* reserved for weak gradient */ + } + + contin: + datah += 4; + datav += 4; + } + } + + gegl_buffer_linear_close (temp1, maxgrad_conv1); + gegl_buffer_linear_close (temp2, maxgrad_conv2); + + g_object_unref (temp0); + g_object_unref (temp1); + g_object_unref (temp2); +} + +GeglTileHandler * +gimp_tile_handler_iscissors_new (GimpPickable *pickable) +{ + g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL); + + return g_object_new (GIMP_TYPE_TILE_HANDLER_ISCISSORS, + "whole-tile", TRUE, + "pickable", pickable, + NULL); +} -- cgit v1.2.3