456 lines
17 KiB
C
456 lines
17 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 <string.h>
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikamath/pikamath.h"
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#include "tools-types.h"
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#include "config/pikadisplayconfig.h"
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#include "core/pika.h"
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#include "core/pikabezierdesc.h"
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#include "core/pikabrush.h"
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#include "core/pikaimage.h"
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#include "core/pikatoolinfo.h"
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#include "paint/pikabrushcore.h"
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#include "paint/pikapaintoptions.h"
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#include "display/pikacanvashandle.h"
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#include "display/pikacanvaspath.h"
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#include "display/pikadisplay.h"
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#include "display/pikadisplayshell.h"
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#include "pikabrushtool.h"
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#include "pikapainttool-paint.h"
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#include "pikatoolcontrol.h"
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static void pika_brush_tool_constructed (GObject *object);
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static void pika_brush_tool_oper_update (PikaTool *tool,
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const PikaCoords *coords,
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GdkModifierType state,
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gboolean proximity,
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PikaDisplay *display);
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static void pika_brush_tool_cursor_update (PikaTool *tool,
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const PikaCoords *coords,
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GdkModifierType state,
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PikaDisplay *display);
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static void pika_brush_tool_options_notify (PikaTool *tool,
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PikaToolOptions *options,
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const GParamSpec *pspec);
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static void pika_brush_tool_paint_start (PikaPaintTool *paint_tool);
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static void pika_brush_tool_paint_end (PikaPaintTool *paint_tool);
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static void pika_brush_tool_paint_flush (PikaPaintTool *paint_tool);
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static PikaCanvasItem *
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pika_brush_tool_get_outline (PikaPaintTool *paint_tool,
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PikaDisplay *display,
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gdouble x,
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gdouble y);
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static void pika_brush_tool_brush_changed (PikaContext *context,
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PikaBrush *brush,
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PikaBrushTool *brush_tool);
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static void pika_brush_tool_set_brush (PikaBrushCore *brush_core,
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PikaBrush *brush,
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PikaBrushTool *brush_tool);
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static const PikaBezierDesc *
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pika_brush_tool_get_boundary (PikaBrushTool *brush_tool,
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gint *width,
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gint *height);
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G_DEFINE_TYPE (PikaBrushTool, pika_brush_tool, PIKA_TYPE_PAINT_TOOL)
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#define parent_class pika_brush_tool_parent_class
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static void
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pika_brush_tool_class_init (PikaBrushToolClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
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PikaPaintToolClass *paint_tool_class = PIKA_PAINT_TOOL_CLASS (klass);
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object_class->constructed = pika_brush_tool_constructed;
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tool_class->oper_update = pika_brush_tool_oper_update;
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tool_class->cursor_update = pika_brush_tool_cursor_update;
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tool_class->options_notify = pika_brush_tool_options_notify;
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paint_tool_class->paint_start = pika_brush_tool_paint_start;
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paint_tool_class->paint_end = pika_brush_tool_paint_end;
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paint_tool_class->paint_flush = pika_brush_tool_paint_flush;
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paint_tool_class->get_outline = pika_brush_tool_get_outline;
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}
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static void
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pika_brush_tool_init (PikaBrushTool *brush_tool)
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{
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PikaTool *tool = PIKA_TOOL (brush_tool);
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pika_tool_control_set_action_pixel_size (tool->control,
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"tools-paintbrush-pixel-size-set");
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pika_tool_control_set_action_size (tool->control,
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"tools-paintbrush-size-set");
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pika_tool_control_set_action_aspect (tool->control,
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"tools-paintbrush-aspect-ratio-set");
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pika_tool_control_set_action_angle (tool->control,
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"tools-paintbrush-angle-set");
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pika_tool_control_set_action_spacing (tool->control,
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"tools-paintbrush-spacing-set");
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pika_tool_control_set_action_hardness (tool->control,
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"tools-paintbrush-hardness-set");
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pika_tool_control_set_action_force (tool->control,
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"tools-paintbrush-force-set");
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pika_tool_control_set_action_object_1 (tool->control,
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"context-brush-select-set");
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}
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static void
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pika_brush_tool_constructed (GObject *object)
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{
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PikaTool *tool = PIKA_TOOL (object);
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PikaPaintTool *paint_tool = PIKA_PAINT_TOOL (object);
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G_OBJECT_CLASS (parent_class)->constructed (object);
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pika_assert (PIKA_IS_BRUSH_CORE (paint_tool->core));
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g_signal_connect_object (pika_tool_get_options (tool), "brush-changed",
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G_CALLBACK (pika_brush_tool_brush_changed),
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paint_tool, 0);
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g_signal_connect_object (paint_tool->core, "set-brush",
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G_CALLBACK (pika_brush_tool_set_brush),
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paint_tool, 0);
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}
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static void
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pika_brush_tool_oper_update (PikaTool *tool,
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const PikaCoords *coords,
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GdkModifierType state,
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gboolean proximity,
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PikaDisplay *display)
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{
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PikaPaintOptions *paint_options = PIKA_PAINT_TOOL_GET_OPTIONS (tool);
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PikaImage *image = pika_display_get_image (display);
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pika_draw_tool_pause (PIKA_DRAW_TOOL (tool));
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PIKA_TOOL_CLASS (parent_class)->oper_update (tool, coords, state,
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proximity, display);
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if (! pika_color_tool_is_enabled (PIKA_COLOR_TOOL (tool)) &&
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image && proximity)
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{
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PikaContext *context = PIKA_CONTEXT (paint_options);
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PikaPaintTool *paint_tool = PIKA_PAINT_TOOL (tool);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_tool->core);
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pika_brush_core_set_brush (brush_core,
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pika_context_get_brush (context));
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pika_brush_core_set_dynamics (brush_core,
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pika_context_get_dynamics (context));
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if (PIKA_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
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{
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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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coords);
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}
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}
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pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
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}
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static void
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pika_brush_tool_cursor_update (PikaTool *tool,
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const PikaCoords *coords,
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GdkModifierType state,
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PikaDisplay *display)
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{
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PikaBrushTool *brush_tool = PIKA_BRUSH_TOOL (tool);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (PIKA_PAINT_TOOL (brush_tool)->core);
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if (! pika_color_tool_is_enabled (PIKA_COLOR_TOOL (tool)))
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{
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if (! brush_core->main_brush || ! brush_core->dynamics)
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{
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pika_tool_set_cursor (tool, display,
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pika_tool_control_get_cursor (tool->control),
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pika_tool_control_get_tool_cursor (tool->control),
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PIKA_CURSOR_MODIFIER_BAD);
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return;
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}
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}
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PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
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}
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static void
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pika_brush_tool_options_notify (PikaTool *tool,
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PikaToolOptions *options,
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const GParamSpec *pspec)
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{
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PIKA_TOOL_CLASS (parent_class)->options_notify (tool, options, pspec);
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if (! strcmp (pspec->name, "brush-size") ||
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! strcmp (pspec->name, "brush-angle") ||
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! strcmp (pspec->name, "brush-aspect-ratio"))
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{
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PikaPaintTool *paint_tool = PIKA_PAINT_TOOL (tool);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_tool->core);
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g_signal_emit_by_name (brush_core, "set-brush",
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brush_core->main_brush);
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}
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}
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static void
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pika_brush_tool_paint_start (PikaPaintTool *paint_tool)
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{
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PikaBrushTool *brush_tool = PIKA_BRUSH_TOOL (paint_tool);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_tool->core);
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const PikaBezierDesc *boundary;
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if (PIKA_PAINT_TOOL_CLASS (parent_class)->paint_start)
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PIKA_PAINT_TOOL_CLASS (parent_class)->paint_start (paint_tool);
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boundary = pika_brush_tool_get_boundary (brush_tool,
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&brush_tool->boundary_width,
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&brush_tool->boundary_height);
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if (boundary)
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brush_tool->boundary = pika_bezier_desc_copy (boundary);
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brush_tool->boundary_scale = brush_core->scale;
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brush_tool->boundary_aspect_ratio = brush_core->aspect_ratio;
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brush_tool->boundary_angle = brush_core->angle;
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brush_tool->boundary_reflect = brush_core->reflect;
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brush_tool->boundary_hardness = brush_core->hardness;
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}
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static void
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pika_brush_tool_paint_end (PikaPaintTool *paint_tool)
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{
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PikaBrushTool *brush_tool = PIKA_BRUSH_TOOL (paint_tool);
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g_clear_pointer (&brush_tool->boundary, pika_bezier_desc_free);
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if (PIKA_PAINT_TOOL_CLASS (parent_class)->paint_end)
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PIKA_PAINT_TOOL_CLASS (parent_class)->paint_end (paint_tool);
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}
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static void
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pika_brush_tool_paint_flush (PikaPaintTool *paint_tool)
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{
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PikaBrushTool *brush_tool = PIKA_BRUSH_TOOL (paint_tool);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_tool->core);
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const PikaBezierDesc *boundary;
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if (PIKA_PAINT_TOOL_CLASS (parent_class)->paint_flush)
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PIKA_PAINT_TOOL_CLASS (parent_class)->paint_flush (paint_tool);
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if (brush_tool->boundary_scale != brush_core->scale ||
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brush_tool->boundary_aspect_ratio != brush_core->aspect_ratio ||
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brush_tool->boundary_angle != brush_core->angle ||
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brush_tool->boundary_reflect != brush_core->reflect ||
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brush_tool->boundary_hardness != brush_core->hardness)
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{
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g_clear_pointer (&brush_tool->boundary, pika_bezier_desc_free);
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boundary = pika_brush_tool_get_boundary (brush_tool,
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&brush_tool->boundary_width,
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&brush_tool->boundary_height);
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if (boundary)
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brush_tool->boundary = pika_bezier_desc_copy (boundary);
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brush_tool->boundary_scale = brush_core->scale;
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brush_tool->boundary_aspect_ratio = brush_core->aspect_ratio;
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brush_tool->boundary_angle = brush_core->angle;
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brush_tool->boundary_reflect = brush_core->reflect;
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brush_tool->boundary_hardness = brush_core->hardness;
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}
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}
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static PikaCanvasItem *
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pika_brush_tool_get_outline (PikaPaintTool *paint_tool,
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PikaDisplay *display,
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gdouble x,
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gdouble y)
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{
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PikaBrushTool *brush_tool = PIKA_BRUSH_TOOL (paint_tool);
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PikaCanvasItem *item;
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item = pika_brush_tool_create_outline (brush_tool, display, x, y);
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if (! item)
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{
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_tool->core);
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if (brush_core->main_brush && brush_core->dynamics)
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{
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/* if an outline was expected, but got scaled away by
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* transform/dynamics, draw a circle in the "normal" size.
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*/
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PikaPaintOptions *options;
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options = PIKA_PAINT_TOOL_GET_OPTIONS (brush_tool);
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pika_paint_tool_set_draw_fallback (paint_tool,
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TRUE, options->brush_size);
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}
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}
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return item;
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}
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PikaCanvasItem *
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pika_brush_tool_create_outline (PikaBrushTool *brush_tool,
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PikaDisplay *display,
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gdouble x,
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gdouble y)
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{
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PikaTool *tool;
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PikaDisplayShell *shell;
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const PikaBezierDesc *boundary = NULL;
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gint width = 0;
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gint height = 0;
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g_return_val_if_fail (PIKA_IS_BRUSH_TOOL (brush_tool), NULL);
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g_return_val_if_fail (PIKA_IS_DISPLAY (display), NULL);
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if (pika_paint_tool_paint_is_active (PIKA_PAINT_TOOL (brush_tool)))
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{
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boundary = brush_tool->boundary;
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width = brush_tool->boundary_width;
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height = brush_tool->boundary_height;
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}
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else
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{
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boundary = pika_brush_tool_get_boundary (brush_tool, &width, &height);
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}
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if (! boundary)
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return NULL;
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tool = PIKA_TOOL (brush_tool);
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shell = pika_display_get_shell (display);
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/* don't draw the boundary if it becomes too small */
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if (SCALEX (shell, width) > 4 &&
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SCALEY (shell, height) > 4)
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{
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x -= width / 2.0;
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y -= height / 2.0;
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if (pika_tool_control_get_precision (tool->control) ==
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PIKA_CURSOR_PRECISION_PIXEL_CENTER)
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{
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#define EPSILON 0.000001
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/* Add EPSILON before rounding since e.g.
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* (5.0 - 0.5) may end up at (4.499999999....)
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* due to floating point fnords
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*/
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x = RINT (x + EPSILON);
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y = RINT (y + EPSILON);
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#undef EPSILON
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}
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return pika_canvas_path_new (shell, boundary, x, y, FALSE,
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PIKA_PATH_STYLE_OUTLINE);
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}
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return NULL;
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}
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static void
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pika_brush_tool_brush_changed (PikaContext *context,
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PikaBrush *brush,
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PikaBrushTool *brush_tool)
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{
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PikaPaintTool *paint_tool = PIKA_PAINT_TOOL (brush_tool);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_tool->core);
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pika_brush_core_set_brush (brush_core, brush);
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}
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static void
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pika_brush_tool_set_brush (PikaBrushCore *brush_core,
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PikaBrush *brush,
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PikaBrushTool *brush_tool)
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{
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pika_draw_tool_pause (PIKA_DRAW_TOOL (brush_tool));
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if (PIKA_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
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{
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PikaPaintCore *paint_core = PIKA_PAINT_CORE (brush_core);
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pika_brush_core_eval_transform_dynamics (brush_core,
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NULL,
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PIKA_PAINT_TOOL_GET_OPTIONS (brush_tool),
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&paint_core->cur_coords);
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}
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pika_draw_tool_resume (PIKA_DRAW_TOOL (brush_tool));
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}
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static const PikaBezierDesc *
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pika_brush_tool_get_boundary (PikaBrushTool *brush_tool,
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gint *width,
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gint *height)
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{
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PikaPaintTool *paint_tool = PIKA_PAINT_TOOL (brush_tool);
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PikaBrushCore *brush_core = PIKA_BRUSH_CORE (paint_tool->core);
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if (paint_tool->draw_brush &&
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brush_core->main_brush &&
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brush_core->dynamics &&
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brush_core->scale > 0.0)
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{
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return pika_brush_transform_boundary (brush_core->main_brush,
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brush_core->scale,
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brush_core->aspect_ratio,
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brush_core->angle,
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brush_core->reflect,
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brush_core->hardness,
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width,
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height);
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}
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return NULL;
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}
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