621 lines
23 KiB
C
621 lines
23 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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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 <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "libpikabase/pikabase.h"
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#include "libpikamath/pikamath.h"
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#include "paint-types.h"
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#include "gegl/pika-gegl-utils.h"
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#include "core/pika.h"
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#include "core/pikacontainer.h"
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#include "core/pikadrawable.h"
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#include "core/pikadynamics.h"
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#include "core/pikaerror.h"
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#include "core/pikaimage.h"
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#include "core/pikaimage-new.h"
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#include "core/pikapickable.h"
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#include "core/pikasymmetry.h"
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#include "pikasourcecore.h"
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#include "pikasourceoptions.h"
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#include "pika-intl.h"
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enum
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{
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PROP_0,
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};
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static gboolean pika_source_core_start (PikaPaintCore *paint_core,
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GList *drawables,
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PikaPaintOptions *paint_options,
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const PikaCoords *coords,
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GError **error);
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static void pika_source_core_paint (PikaPaintCore *paint_core,
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GList *drawables,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym,
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PikaPaintState paint_state,
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guint32 time);
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#if 0
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static void pika_source_core_motion (PikaSourceCore *source_core,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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gboolean self_drawable,
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PikaSymmetry *sym);
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#endif
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static gboolean pika_source_core_real_use_source (PikaSourceCore *source_core,
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PikaSourceOptions *options);
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static GeglBuffer *
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pika_source_core_real_get_source (PikaSourceCore *source_core,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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gboolean self_drawable,
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PikaPickable *src_pickable,
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gint src_offset_x,
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gint src_offset_y,
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GeglBuffer *paint_buffer,
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gint paint_buffer_x,
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gint paint_buffer_y,
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gint *paint_area_offset_x,
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gint *paint_area_offset_y,
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gint *paint_area_width,
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gint *paint_area_height,
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GeglRectangle *src_rect);
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G_DEFINE_TYPE (PikaSourceCore, pika_source_core, PIKA_TYPE_BRUSH_CORE)
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#define parent_class pika_source_core_parent_class
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static void
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pika_source_core_class_init (PikaSourceCoreClass *klass)
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{
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PikaPaintCoreClass *paint_core_class = PIKA_PAINT_CORE_CLASS (klass);
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PikaBrushCoreClass *brush_core_class = PIKA_BRUSH_CORE_CLASS (klass);
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paint_core_class->start = pika_source_core_start;
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paint_core_class->paint = pika_source_core_paint;
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brush_core_class->handles_changing_brush = TRUE;
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klass->use_source = pika_source_core_real_use_source;
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klass->get_source = pika_source_core_real_get_source;
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klass->motion = NULL;
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}
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static void
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pika_source_core_init (PikaSourceCore *source_core)
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{
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source_core->set_source = FALSE;
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source_core->orig_src_x = 0;
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source_core->orig_src_y = 0;
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source_core->offset_x = 0;
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source_core->offset_y = 0;
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source_core->first_stroke = TRUE;
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}
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static gboolean
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pika_source_core_start (PikaPaintCore *paint_core,
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GList *drawables,
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PikaPaintOptions *paint_options,
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const PikaCoords *coords,
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GError **error)
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{
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PikaSourceCore *source_core = PIKA_SOURCE_CORE (paint_core);
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PikaSourceOptions *options = PIKA_SOURCE_OPTIONS (paint_options);
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if (! PIKA_PAINT_CORE_CLASS (parent_class)->start (paint_core, drawables,
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paint_options, coords,
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error))
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{
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return FALSE;
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}
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paint_core->use_saved_proj = FALSE;
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if (! source_core->set_source &&
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pika_source_core_use_source (source_core, options))
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{
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if (! options->src_drawables)
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{
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g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
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_("Set a source image first."));
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return FALSE;
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}
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else if (options->align_mode == PIKA_SOURCE_ALIGN_REGISTERED &&
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g_list_length (drawables) > 1)
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{
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g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
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_("\"Registered\" alignment cannot paint on multiple drawables."));
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return FALSE;
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}
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if (options->sample_merged &&
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g_list_length (drawables) == 1 &&
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pika_item_get_image (PIKA_ITEM (options->src_drawables->data)) ==
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pika_item_get_image (PIKA_ITEM (drawables->data)))
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{
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paint_core->use_saved_proj = TRUE;
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}
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}
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return TRUE;
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}
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static void
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pika_source_core_paint (PikaPaintCore *paint_core,
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GList *drawables,
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PikaPaintOptions *paint_options,
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PikaSymmetry *sym,
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PikaPaintState paint_state,
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guint32 time)
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{
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PikaSourceCore *source_core = PIKA_SOURCE_CORE (paint_core);
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PikaSourceOptions *options = PIKA_SOURCE_OPTIONS (paint_options);
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const PikaCoords *coords;
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/* The source is based on the original stroke */
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coords = pika_symmetry_get_origin (sym);
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switch (paint_state)
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{
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case PIKA_PAINT_STATE_INIT:
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if (source_core->set_source)
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{
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g_object_set (options,
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"src-drawables", drawables,
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"src-x", (gint) floor (coords->x),
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"src-y", (gint) floor (coords->y),
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NULL);
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/* FIXME(?): subpixel source sampling */
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source_core->first_stroke = TRUE;
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}
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else if (options->align_mode == PIKA_SOURCE_ALIGN_NO)
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{
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g_object_get (options,
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"src-x", &source_core->orig_src_x,
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"src-y", &source_core->orig_src_y,
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NULL);
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source_core->first_stroke = TRUE;
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}
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break;
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case PIKA_PAINT_STATE_MOTION:
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if (source_core->set_source)
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{
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/* If the control key is down, move the src target and return */
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g_object_set (options,
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"src-drawables", drawables,
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"src-x", (gint) floor (coords->x),
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"src-y", (gint) floor (coords->y),
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NULL);
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source_core->first_stroke = TRUE;
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}
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else
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{
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/* otherwise, update the target */
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gint src_x;
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gint src_y;
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gint dest_x;
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gint dest_y;
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dest_x = floor (coords->x);
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dest_y = floor (coords->y);
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g_object_get (options,
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"src-x", &src_x,
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"src-y", &src_y,
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NULL);
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if (options->align_mode == PIKA_SOURCE_ALIGN_REGISTERED)
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{
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source_core->offset_x = 0;
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source_core->offset_y = 0;
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}
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else if (options->align_mode == PIKA_SOURCE_ALIGN_FIXED)
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{
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source_core->offset_x = src_x - dest_x;
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source_core->offset_y = src_y - dest_y;
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}
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else if (source_core->first_stroke)
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{
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source_core->offset_x = src_x - dest_x;
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source_core->offset_y = src_y - dest_y;
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source_core->first_stroke = FALSE;
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}
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g_object_set (options,
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"src-x", dest_x + source_core->offset_x,
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"src-y", dest_y + source_core->offset_y,
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NULL);
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for (GList *iter = drawables; iter; iter = iter->next)
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pika_source_core_motion (source_core, iter->data,
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paint_options,
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(g_list_length (drawables) > 1),
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sym);
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}
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break;
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case PIKA_PAINT_STATE_FINISH:
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if (options->align_mode == PIKA_SOURCE_ALIGN_NO &&
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! source_core->first_stroke)
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{
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g_object_set (options,
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"src-x", source_core->orig_src_x,
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"src-y", source_core->orig_src_y,
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NULL);
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}
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break;
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default:
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break;
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}
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}
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void
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pika_source_core_motion (PikaSourceCore *source_core,
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PikaDrawable *drawable,
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PikaPaintOptions *paint_options,
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gboolean self_drawable,
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PikaSymmetry *sym)
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{
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PikaPaintCore *paint_core = PIKA_PAINT_CORE (source_core);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (source_core);
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PikaSourceOptions *options = PIKA_SOURCE_OPTIONS (paint_options);
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PikaDynamics *dynamics = PIKA_BRUSH_CORE (paint_core)->dynamics;
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PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
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PikaPickable *src_pickable = NULL;
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GeglBuffer *src_buffer = NULL;
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GeglRectangle src_rect;
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gint base_src_offset_x;
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gint base_src_offset_y;
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gint src_offset_x;
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gint src_offset_y;
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GeglBuffer *paint_buffer;
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gint paint_buffer_x;
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gint paint_buffer_y;
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gint paint_area_offset_x;
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gint paint_area_offset_y;
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gint paint_area_width;
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gint paint_area_height;
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gdouble fade_point;
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gdouble opacity;
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PikaLayerMode paint_mode;
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GeglNode *op;
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PikaCoords origin;
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PikaCoords coords;
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gint src_off_x = 0;
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gint src_off_y = 0;
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gint src_x, src_y;
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gint off_x, off_y;
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gint n_strokes;
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gint i;
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fade_point = pika_paint_options_get_fade (paint_options, image,
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paint_core->pixel_dist);
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origin = *(pika_symmetry_get_origin (sym));
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pika_item_get_offset (PIKA_ITEM (drawable), &off_x, &off_y);
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coords = origin;
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coords.x -= off_x;
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coords.y -= off_y;
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pika_symmetry_set_origin (sym, drawable, &coords);
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/* Some settings are based on the original stroke. */
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opacity = pika_dynamics_get_linear_value (dynamics,
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PIKA_DYNAMICS_OUTPUT_OPACITY,
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&origin,
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paint_options,
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fade_point);
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if (opacity == 0.0)
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return;
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base_src_offset_x = source_core->offset_x;
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base_src_offset_y = source_core->offset_y;
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if (pika_source_core_use_source (source_core, options))
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{
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if (self_drawable)
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{
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src_pickable = PIKA_PICKABLE (drawable);
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}
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else if (options->sample_merged)
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{
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PikaImage *src_image;
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src_image = pika_pickable_get_image (options->src_drawables->data);
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if (! pika_paint_core_get_show_all (paint_core))
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{
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src_pickable = PIKA_PICKABLE (src_image);
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}
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else
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{
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src_pickable = PIKA_PICKABLE (pika_image_get_projection (src_image));
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}
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}
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else
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{
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src_pickable = options->src_pickable;
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}
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if (PIKA_IS_ITEM (src_pickable))
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pika_item_get_offset (PIKA_ITEM (src_pickable),
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&src_off_x, &src_off_y);
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}
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g_object_get (options,
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"src-x", &src_x,
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"src-y", &src_y,
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NULL);
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pika_brush_core_eval_transform_dynamics (brush_core,
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image,
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paint_options,
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&origin);
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paint_mode = pika_context_get_paint_mode (PIKA_CONTEXT (paint_options));
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n_strokes = pika_symmetry_get_size (sym);
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for (i = 0; i < n_strokes; i++)
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{
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coords = *(pika_symmetry_get_coords (sym, i));
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pika_brush_core_eval_transform_symmetry (brush_core, sym, i);
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paint_buffer = pika_paint_core_get_paint_buffer (paint_core, drawable,
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paint_options,
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paint_mode,
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&coords,
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&paint_buffer_x,
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&paint_buffer_y,
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NULL, NULL);
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if (! paint_buffer)
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continue;
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paint_area_offset_x = 0;
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paint_area_offset_y = 0;
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paint_area_width = gegl_buffer_get_width (paint_buffer);
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paint_area_height = gegl_buffer_get_height (paint_buffer);
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src_offset_x = base_src_offset_x;
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src_offset_y = base_src_offset_y;
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if (pika_source_core_use_source (source_core, options))
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{
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/* When using a source, use the same for every stroke. */
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src_offset_x += floor (origin.x) - floor (coords.x) - src_off_x;
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src_offset_y += floor (origin.y) - floor (coords.y) - src_off_y;
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src_buffer =
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PIKA_SOURCE_CORE_GET_CLASS (source_core)->get_source (source_core,
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drawable,
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paint_options,
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self_drawable,
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src_pickable,
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src_offset_x,
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src_offset_y,
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paint_buffer,
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paint_buffer_x,
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paint_buffer_y,
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&paint_area_offset_x,
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&paint_area_offset_y,
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&paint_area_width,
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&paint_area_height,
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&src_rect);
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if (! src_buffer)
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continue;
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}
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/* Set the paint buffer to transparent */
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gegl_buffer_clear (paint_buffer, NULL);
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op = pika_symmetry_get_operation (sym, i);
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if (op)
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{
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GeglNode *node;
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GeglNode *input;
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GeglNode *translate_before;
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GeglNode *translate_after;
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GeglNode *output;
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|
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node = gegl_node_new ();
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input = gegl_node_get_input_proxy (node, "input");
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translate_before = gegl_node_new_child (
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node,
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"operation", "gegl:translate",
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"x", -((gdouble) src_x + 0.5),
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"y", -((gdouble) src_y + 0.5),
|
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NULL);
|
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|
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gegl_node_add_child (node, op);
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translate_after = gegl_node_new_child (
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node,
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"operation", "gegl:translate",
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"x", ((gdouble) src_x + 0.5) +
|
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(paint_area_offset_x - src_rect.x),
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"y", ((gdouble) src_y + 0.5) +
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(paint_area_offset_y - src_rect.y),
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NULL);
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|
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output = gegl_node_get_output_proxy (node, "output");
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|
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gegl_node_link_many (input,
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translate_before,
|
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op,
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translate_after,
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output,
|
|
NULL);
|
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|
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g_object_unref (op);
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|
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op = node;
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}
|
|
|
|
PIKA_SOURCE_CORE_GET_CLASS (source_core)->motion (source_core,
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drawable,
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paint_options,
|
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&coords,
|
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op,
|
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opacity,
|
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src_pickable,
|
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src_buffer,
|
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&src_rect,
|
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src_offset_x,
|
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src_offset_y,
|
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paint_buffer,
|
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paint_buffer_x,
|
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paint_buffer_y,
|
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paint_area_offset_x,
|
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paint_area_offset_y,
|
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paint_area_width,
|
|
paint_area_height);
|
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|
|
g_clear_object (&op);
|
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|
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g_clear_object (&src_buffer);
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
pika_source_core_use_source (PikaSourceCore *source_core,
|
|
PikaSourceOptions *options)
|
|
{
|
|
return PIKA_SOURCE_CORE_GET_CLASS (source_core)->use_source (source_core,
|
|
options);
|
|
}
|
|
|
|
static gboolean
|
|
pika_source_core_real_use_source (PikaSourceCore *source_core,
|
|
PikaSourceOptions *options)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
static GeglBuffer *
|
|
pika_source_core_real_get_source (PikaSourceCore *source_core,
|
|
PikaDrawable *drawable,
|
|
PikaPaintOptions *paint_options,
|
|
gboolean self_drawable,
|
|
PikaPickable *src_pickable,
|
|
gint src_offset_x,
|
|
gint src_offset_y,
|
|
GeglBuffer *paint_buffer,
|
|
gint paint_buffer_x,
|
|
gint paint_buffer_y,
|
|
gint *paint_area_offset_x,
|
|
gint *paint_area_offset_y,
|
|
gint *paint_area_width,
|
|
gint *paint_area_height,
|
|
GeglRectangle *src_rect)
|
|
{
|
|
PikaSourceOptions *options = PIKA_SOURCE_OPTIONS (paint_options);
|
|
PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
|
|
PikaImage *src_image = pika_pickable_get_image (src_pickable);
|
|
GeglBuffer *src_buffer = pika_pickable_get_buffer (src_pickable);
|
|
GeglBuffer *dest_buffer;
|
|
gboolean sample_merged;
|
|
gint x, y;
|
|
gint width, height;
|
|
|
|
/* As a special case, we bypass sample merged value when we request
|
|
* each drawable to be its own source.
|
|
*/
|
|
sample_merged = options->sample_merged && (! self_drawable);
|
|
|
|
if (! pika_rectangle_intersect (paint_buffer_x + src_offset_x,
|
|
paint_buffer_y + src_offset_y,
|
|
gegl_buffer_get_width (paint_buffer),
|
|
gegl_buffer_get_height (paint_buffer),
|
|
gegl_buffer_get_x (src_buffer),
|
|
gegl_buffer_get_y (src_buffer),
|
|
gegl_buffer_get_width (src_buffer),
|
|
gegl_buffer_get_height (src_buffer),
|
|
&x, &y,
|
|
&width, &height))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/* If the source image is different from the destination,
|
|
* then we should copy straight from the source image
|
|
* to the canvas.
|
|
* Otherwise, we need a call to get_orig_image to make sure
|
|
* we get a copy of the unblemished (offset) image
|
|
*/
|
|
if (( sample_merged && (src_image != image)) ||
|
|
(! sample_merged && (g_list_length (options->src_drawables) != 1 ||
|
|
options->src_drawables->data != drawable)))
|
|
{
|
|
dest_buffer = src_buffer;
|
|
}
|
|
else
|
|
{
|
|
/* get the original image */
|
|
if (sample_merged)
|
|
dest_buffer = pika_paint_core_get_orig_proj (PIKA_PAINT_CORE (source_core));
|
|
else
|
|
dest_buffer = pika_paint_core_get_orig_image (PIKA_PAINT_CORE (source_core),
|
|
drawable);
|
|
}
|
|
|
|
*paint_area_offset_x = x - (paint_buffer_x + src_offset_x);
|
|
*paint_area_offset_y = y - (paint_buffer_y + src_offset_y);
|
|
*paint_area_width = width;
|
|
*paint_area_height = height;
|
|
|
|
*src_rect = *GEGL_RECTANGLE (x, y, width, height);
|
|
|
|
return g_object_ref (dest_buffer);
|
|
}
|
