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/core/gimpdrawable-gradient.c | 313 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 313 insertions(+) create mode 100644 app/core/gimpdrawable-gradient.c (limited to 'app/core/gimpdrawable-gradient.c') diff --git a/app/core/gimpdrawable-gradient.c b/app/core/gimpdrawable-gradient.c new file mode 100644 index 0000000..2d7cbe8 --- /dev/null +++ b/app/core/gimpdrawable-gradient.c @@ -0,0 +1,313 @@ +/* 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 "core-types.h" + +#include "gegl/gimp-gegl-apply-operation.h" +#include "gegl/gimp-gegl-loops.h" +#include "gegl/gimp-gegl-utils.h" + +#include "operations/layer-modes/gimp-layer-modes.h" + +#include "gimp.h" +#include "gimpchannel.h" +#include "gimpcontext.h" +#include "gimpdrawable-gradient.h" +#include "gimpgradient.h" +#include "gimpimage.h" +#include "gimpprogress.h" + +#include "gimp-intl.h" + + +/* public functions */ + +void +gimp_drawable_gradient (GimpDrawable *drawable, + GimpContext *context, + GimpGradient *gradient, + GeglDistanceMetric metric, + GimpLayerMode paint_mode, + GimpGradientType gradient_type, + gdouble opacity, + gdouble offset, + GimpRepeatMode repeat, + gboolean reverse, + GimpGradientBlendColorSpace blend_color_space, + gboolean supersample, + gint max_depth, + gdouble threshold, + gboolean dither, + gdouble startx, + gdouble starty, + gdouble endx, + gdouble endy, + GimpProgress *progress) +{ + GimpImage *image; + GeglBuffer *buffer; + GeglBuffer *shapeburst = NULL; + GeglNode *render; + gint x, y, width, height; + + g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); + g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable))); + g_return_if_fail (GIMP_IS_CONTEXT (context)); + g_return_if_fail (GIMP_IS_GRADIENT (gradient)); + g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress)); + + image = gimp_item_get_image (GIMP_ITEM (drawable)); + + if (! gimp_item_mask_intersect (GIMP_ITEM (drawable), &x, &y, &width, &height)) + return; + + gimp_set_busy (image->gimp); + + /* Always create an alpha temp buf (for generality) */ + buffer = gegl_buffer_new (GEGL_RECTANGLE (x, y, width, height), + gimp_drawable_get_format_with_alpha (drawable)); + + if (gradient_type >= GIMP_GRADIENT_SHAPEBURST_ANGULAR && + gradient_type <= GIMP_GRADIENT_SHAPEBURST_DIMPLED) + { + shapeburst = + gimp_drawable_gradient_shapeburst_distmap (drawable, metric, + GEGL_RECTANGLE (x, y, width, height), + progress); + } + + gimp_drawable_gradient_adjust_coords (drawable, + gradient_type, + GEGL_RECTANGLE (x, y, width, height), + &startx, &starty, &endx, &endy); + + render = gegl_node_new_child (NULL, + "operation", "gimp:gradient", + "context", context, + "gradient", gradient, + "start-x", startx, + "start-y", starty, + "end-x", endx, + "end-y", endy, + "gradient-type", gradient_type, + "gradient-repeat", repeat, + "offset", offset, + "gradient-reverse", reverse, + "gradient-blend-color-space", blend_color_space, + "supersample", supersample, + "supersample-depth", max_depth, + "supersample-threshold", threshold, + "dither", dither, + NULL); + + gimp_gegl_apply_operation (shapeburst, progress, C_("undo-type", "Gradient"), + render, + buffer, GEGL_RECTANGLE (x, y, width, height), + FALSE); + + g_object_unref (render); + + if (shapeburst) + g_object_unref (shapeburst); + + gimp_drawable_apply_buffer (drawable, buffer, + GEGL_RECTANGLE (x, y, width, height), + TRUE, C_("undo-type", "Gradient"), + opacity, paint_mode, + GIMP_LAYER_COLOR_SPACE_AUTO, + GIMP_LAYER_COLOR_SPACE_AUTO, + gimp_layer_mode_get_paint_composite_mode (paint_mode), + NULL, x, y); + + gimp_drawable_update (drawable, x, y, width, height); + + g_object_unref (buffer); + + gimp_unset_busy (image->gimp); +} + +GeglBuffer * +gimp_drawable_gradient_shapeburst_distmap (GimpDrawable *drawable, + GeglDistanceMetric metric, + const GeglRectangle *region, + GimpProgress *progress) +{ + GimpChannel *mask; + GimpImage *image; + GeglBuffer *dist_buffer; + GeglBuffer *temp_buffer; + GeglNode *shapeburst; + + g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL); + g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL); + g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL); + + image = gimp_item_get_image (GIMP_ITEM (drawable)); + + /* allocate the distance map */ + dist_buffer = gegl_buffer_new (region, babl_format ("Y float")); + + /* allocate the selection mask copy */ + temp_buffer = gegl_buffer_new (region, babl_format ("Y float")); + + mask = gimp_image_get_mask (image); + + /* If the image mask is not empty, use it as the shape burst source */ + if (! gimp_channel_is_empty (mask)) + { + gint x, y, width, height; + gint off_x, off_y; + + gimp_item_mask_intersect (GIMP_ITEM (drawable), &x, &y, &width, &height); + gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y); + + /* copy the mask to the temp mask */ + gimp_gegl_buffer_copy ( + gimp_drawable_get_buffer (GIMP_DRAWABLE (mask)), + GEGL_RECTANGLE (x + off_x, y + off_y, width, height), + GEGL_ABYSS_NONE, temp_buffer, region); + } + else + { + /* If the intended drawable has an alpha channel, use that */ + if (gimp_drawable_has_alpha (drawable)) + { + const Babl *component_format; + + component_format = babl_format ("A float"); + + /* extract the aplha into the temp mask */ + gegl_buffer_set_format (temp_buffer, component_format); + gimp_gegl_buffer_copy (gimp_drawable_get_buffer (drawable), region, + GEGL_ABYSS_NONE, + temp_buffer, region); + gegl_buffer_set_format (temp_buffer, NULL); + } + else + { + GeglColor *white = gegl_color_new ("white"); + + /* Otherwise, just fill the shapeburst to white */ + gegl_buffer_set_color (temp_buffer, NULL, white); + g_object_unref (white); + } + } + + shapeburst = gegl_node_new_child (NULL, + "operation", "gegl:distance-transform", + "normalize", TRUE, + "metric", metric, + NULL); + + if (progress) + gimp_gegl_progress_connect (shapeburst, progress, + _("Calculating distance map")); + + gimp_gegl_apply_operation (temp_buffer, NULL, NULL, + shapeburst, + dist_buffer, region, FALSE); + + g_object_unref (shapeburst); + + g_object_unref (temp_buffer); + + return dist_buffer; +} + +void +gimp_drawable_gradient_adjust_coords (GimpDrawable *drawable, + GimpGradientType gradient_type, + const GeglRectangle *region, + gdouble *startx, + gdouble *starty, + gdouble *endx, + gdouble *endy) +{ + g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); + g_return_if_fail (region != NULL); + g_return_if_fail (startx != NULL); + g_return_if_fail (starty != NULL); + g_return_if_fail (endx != NULL); + g_return_if_fail (endy != NULL); + + /* we potentially adjust the gradient coordinates according to the gradient + * type, so that in cases where the gradient span is not related to the + * segment length, the gradient cache (in GimpOperationGradient) is big + * enough not to produce banding. + */ + + switch (gradient_type) + { + /* for conical gradients, use a segment with the original origin and + * direction, whose length is the circumference of the largest circle + * centered at the origin, passing through one of the regions's vertices. + */ + case GIMP_GRADIENT_CONICAL_SYMMETRIC: + case GIMP_GRADIENT_CONICAL_ASYMMETRIC: + { + gdouble r = 0.0; + GimpVector2 v; + + r = MAX (r, hypot (region->x - *startx, + region->y - *starty)); + r = MAX (r, hypot (region->x + region->width - *startx, + region->y - *starty)); + r = MAX (r, hypot (region->x - *startx, + region->y + region->height - *starty)); + r = MAX (r, hypot (region->x + region->width - *startx, + region->y + region->height - *starty)); + + /* symmetric conical gradients only span half a revolution, and + * therefore require only half the cache size. + */ + if (gradient_type == GIMP_GRADIENT_CONICAL_SYMMETRIC) + r /= 2.0; + + gimp_vector2_set (&v, *endx - *startx, *endy - *starty); + gimp_vector2_normalize (&v); + gimp_vector2_mul (&v, 2.0 * G_PI * r); + + *endx = *startx + v.x; + *endy = *starty + v.y; + } + break; + + /* for shaped gradients, only the segment's length matters; use the + * regions's diagonal, which is the largest possible distance between two + * points in the region. + */ + case GIMP_GRADIENT_SHAPEBURST_ANGULAR: + case GIMP_GRADIENT_SHAPEBURST_SPHERICAL: + case GIMP_GRADIENT_SHAPEBURST_DIMPLED: + *startx = region->x; + *starty = region->y; + *endx = region->x + region->width; + *endy = region->y + region->height; + break; + + default: + break; + } +} -- cgit v1.2.3