a0b73420ec
Add support for reflecting brushes as part of their transformation. The reflection is performed as the last step of the transformation, across the vertical axis. The option to reflect the brush is not exposed in the UI, or through the PDB, but is intended to be used for linking the brush transformation to the view transformation, in the next commit.
349 lines
13 KiB
C
349 lines
13 KiB
C
/* GIMP - The GNU Image Manipulation Program
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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 <http://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 "libgimpmath/gimpmath.h"
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#include "tools-types.h"
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#include "config/gimpdisplayconfig.h"
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#include "core/gimp.h"
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#include "core/gimpbezierdesc.h"
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#include "core/gimpbrush.h"
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#include "core/gimpimage.h"
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#include "core/gimptoolinfo.h"
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#include "paint/gimpbrushcore.h"
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#include "paint/gimppaintoptions.h"
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#include "display/gimpcanvashandle.h"
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#include "display/gimpcanvaspath.h"
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#include "display/gimpdisplay.h"
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#include "display/gimpdisplayshell.h"
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#include "gimpbrushtool.h"
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#include "gimptoolcontrol.h"
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static void gimp_brush_tool_constructed (GObject *object);
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static void gimp_brush_tool_oper_update (GimpTool *tool,
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const GimpCoords *coords,
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GdkModifierType state,
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gboolean proximity,
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GimpDisplay *display);
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static void gimp_brush_tool_cursor_update (GimpTool *tool,
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const GimpCoords *coords,
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GdkModifierType state,
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GimpDisplay *display);
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static void gimp_brush_tool_options_notify (GimpTool *tool,
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GimpToolOptions *options,
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const GParamSpec *pspec);
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static GimpCanvasItem *
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gimp_brush_tool_get_outline (GimpPaintTool *paint_tool,
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GimpDisplay *display,
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gdouble x,
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gdouble y);
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static void gimp_brush_tool_brush_changed (GimpContext *context,
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GimpBrush *brush,
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GimpBrushTool *brush_tool);
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static void gimp_brush_tool_set_brush (GimpBrushCore *brush_core,
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GimpBrush *brush,
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GimpBrushTool *brush_tool);
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G_DEFINE_TYPE (GimpBrushTool, gimp_brush_tool, GIMP_TYPE_PAINT_TOOL)
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#define parent_class gimp_brush_tool_parent_class
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static void
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gimp_brush_tool_class_init (GimpBrushToolClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
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GimpPaintToolClass *paint_tool_class = GIMP_PAINT_TOOL_CLASS (klass);
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object_class->constructed = gimp_brush_tool_constructed;
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tool_class->oper_update = gimp_brush_tool_oper_update;
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tool_class->cursor_update = gimp_brush_tool_cursor_update;
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tool_class->options_notify = gimp_brush_tool_options_notify;
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paint_tool_class->get_outline = gimp_brush_tool_get_outline;
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}
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static void
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gimp_brush_tool_init (GimpBrushTool *brush_tool)
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{
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GimpTool *tool = GIMP_TOOL (brush_tool);
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gimp_tool_control_set_action_size (tool->control,
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"tools/tools-paintbrush-size-set");
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gimp_tool_control_set_action_aspect (tool->control,
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"tools/tools-paintbrush-aspect-ratio-set");
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gimp_tool_control_set_action_angle (tool->control,
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"tools/tools-paintbrush-angle-set");
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gimp_tool_control_set_action_spacing (tool->control,
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"tools/tools-paintbrush-spacing-set");
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gimp_tool_control_set_action_hardness (tool->control,
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"tools/tools-paintbrush-hardness-set");
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gimp_tool_control_set_action_force (tool->control,
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"tools/tools-paintbrush-force-set");
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gimp_tool_control_set_action_object_1 (tool->control,
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"context/context-brush-select-set");
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}
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static void
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gimp_brush_tool_constructed (GObject *object)
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{
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GimpTool *tool = GIMP_TOOL (object);
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GimpPaintTool *paint_tool = GIMP_PAINT_TOOL (object);
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G_OBJECT_CLASS (parent_class)->constructed (object);
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g_assert (GIMP_IS_BRUSH_CORE (paint_tool->core));
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g_signal_connect_object (gimp_tool_get_options (tool), "brush-changed",
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G_CALLBACK (gimp_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 (gimp_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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gimp_brush_tool_oper_update (GimpTool *tool,
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const GimpCoords *coords,
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GdkModifierType state,
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gboolean proximity,
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GimpDisplay *display)
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{
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GimpPaintOptions *paint_options = GIMP_PAINT_TOOL_GET_OPTIONS (tool);
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GimpDrawable *drawable;
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gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
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GIMP_TOOL_CLASS (parent_class)->oper_update (tool, coords, state,
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proximity, display);
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drawable = gimp_image_get_active_drawable (gimp_display_get_image (display));
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if (! gimp_color_tool_is_enabled (GIMP_COLOR_TOOL (tool)) &&
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drawable && proximity)
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{
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GimpContext *context = GIMP_CONTEXT (paint_options);
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GimpPaintTool *paint_tool = GIMP_PAINT_TOOL (tool);
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GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paint_tool->core);
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gimp_brush_core_set_brush (brush_core,
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gimp_context_get_brush (context));
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gimp_brush_core_set_dynamics (brush_core,
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gimp_context_get_dynamics (context));
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if (GIMP_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
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{
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gimp_brush_core_eval_transform_dynamics (brush_core,
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drawable,
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paint_options,
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coords);
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}
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}
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gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
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}
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static void
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gimp_brush_tool_cursor_update (GimpTool *tool,
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const GimpCoords *coords,
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GdkModifierType state,
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GimpDisplay *display)
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{
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GimpBrushTool *brush_tool = GIMP_BRUSH_TOOL (tool);
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GimpBrushCore *brush_core = GIMP_BRUSH_CORE (GIMP_PAINT_TOOL (brush_tool)->core);
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if (! gimp_color_tool_is_enabled (GIMP_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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gimp_tool_set_cursor (tool, display,
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gimp_tool_control_get_cursor (tool->control),
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gimp_tool_control_get_tool_cursor (tool->control),
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GIMP_CURSOR_MODIFIER_BAD);
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return;
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}
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}
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GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
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}
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static void
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gimp_brush_tool_options_notify (GimpTool *tool,
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GimpToolOptions *options,
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const GParamSpec *pspec)
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{
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GIMP_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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GimpPaintTool *paint_tool = GIMP_PAINT_TOOL (tool);
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GimpBrushCore *brush_core = GIMP_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 GimpCanvasItem *
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gimp_brush_tool_get_outline (GimpPaintTool *paint_tool,
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GimpDisplay *display,
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gdouble x,
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gdouble y)
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{
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GimpBrushTool *brush_tool = GIMP_BRUSH_TOOL (paint_tool);
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GimpCanvasItem *item;
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item = gimp_brush_tool_create_outline (brush_tool, display, x, y);
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if (! item)
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{
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GimpBrushCore *brush_core = GIMP_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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GimpPaintOptions *options;
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options = GIMP_PAINT_TOOL_GET_OPTIONS (brush_tool);
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gimp_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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GimpCanvasItem *
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gimp_brush_tool_create_outline (GimpBrushTool *brush_tool,
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GimpDisplay *display,
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gdouble x,
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gdouble y)
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{
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GimpBrushCore *brush_core;
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GimpPaintOptions *options;
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GimpDisplayShell *shell;
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const GimpBezierDesc *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 (GIMP_IS_BRUSH_TOOL (brush_tool), NULL);
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g_return_val_if_fail (GIMP_IS_DISPLAY (display), NULL);
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if (! GIMP_PAINT_TOOL (brush_tool)->draw_brush)
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return NULL;
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brush_core = GIMP_BRUSH_CORE (GIMP_PAINT_TOOL (brush_tool)->core);
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options = GIMP_PAINT_TOOL_GET_OPTIONS (brush_tool);
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shell = gimp_display_get_shell (display);
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if (! brush_core->main_brush || ! brush_core->dynamics)
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return NULL;
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if (brush_core->scale > 0.0)
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boundary = gimp_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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/* don't draw the boundary if it becomes too small */
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if (boundary &&
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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 (gimp_paint_options_get_brush_mode (options) == GIMP_BRUSH_HARD)
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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 gimp_canvas_path_new (shell, boundary, x, y, FALSE,
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GIMP_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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gimp_brush_tool_brush_changed (GimpContext *context,
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GimpBrush *brush,
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GimpBrushTool *brush_tool)
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{
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GimpPaintTool *paint_tool = GIMP_PAINT_TOOL (brush_tool);
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GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paint_tool->core);
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gimp_brush_core_set_brush (brush_core, brush);
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}
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static void
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gimp_brush_tool_set_brush (GimpBrushCore *brush_core,
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GimpBrush *brush,
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GimpBrushTool *brush_tool)
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{
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gimp_draw_tool_pause (GIMP_DRAW_TOOL (brush_tool));
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if (GIMP_BRUSH_CORE_GET_CLASS (brush_core)->handles_transforming_brush)
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{
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GimpPaintCore *paint_core = GIMP_PAINT_CORE (brush_core);
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gimp_brush_core_eval_transform_dynamics (brush_core,
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NULL,
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GIMP_PAINT_TOOL_GET_OPTIONS (brush_tool),
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&paint_core->cur_coords);
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}
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gimp_draw_tool_resume (GIMP_DRAW_TOOL (brush_tool));
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}
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