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gimp/app/paint/gimppencil.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "base/temp-buf.h"
#include "paint-funcs/paint-funcs.h"
#include "core/gimp.h"
#include "core/gimpbrush.h"
#include "core/gimpcontext.h"
#include "core/gimpdrawable.h"
#include "core/gimpgradient.h"
#include "core/gimpimage.h"
#include "gdisplay.h"
#include "gimppenciltool.h"
#include "gimppainttool.h"
#include "paint_options.h"
#include "tool_options.h"
#include "tool_manager.h"
#include "libgimp/gimpintl.h"
#define PENCIL_INCREMENTAL_DEFAULT FALSE
static void gimp_pencil_tool_class_init (GimpPencilToolClass *klass);
static void gimp_pencil_tool_init (GimpPencilTool *pancil);
static void gimp_pencil_tool_paint (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintState state);
static void gimp_pencil_tool_motion (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintPressureOptions *pressure_options,
gboolean incremental);
/* private variables */
static gboolean non_gui_incremental = PENCIL_INCREMENTAL_DEFAULT;
static PaintOptions *pencil_options = NULL;
static GimpPaintToolClass *parent_class = NULL;
/* functions */
void
gimp_pencil_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_PENCIL_TOOL,
TRUE,
"gimp:pencil_tool",
_("Pencil"),
_("Paint hard edged pixels"),
N_("/Tools/Paint Tools/Pencil"), "P",
NULL, "tools/pencil.html",
GIMP_STOCK_TOOL_PENCIL);
}
GType
gimp_pencil_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpPencilToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_pencil_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpPencilTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_pencil_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_PAINT_TOOL,
"GimpPencilTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_pencil_tool_class_init (GimpPencilToolClass *klass)
{
GimpPaintToolClass *paint_tool_class;
paint_tool_class = GIMP_PAINT_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
paint_tool_class->paint = gimp_pencil_tool_paint;
}
static void
gimp_pencil_tool_init (GimpPencilTool *pencil)
{
GimpTool *tool;
GimpPaintTool *paint_tool;
tool = GIMP_TOOL (pencil);
paint_tool = GIMP_PAINT_TOOL (pencil);
if (! pencil_options)
{
pencil_options = paint_options_new (GIMP_TYPE_PENCIL_TOOL,
paint_options_reset);
tool_manager_register_tool_options (GIMP_TYPE_PENCIL_TOOL,
(GimpToolOptions *) pencil_options);
}
tool->tool_cursor = GIMP_PENCIL_TOOL_CURSOR;
paint_tool->pick_colors = TRUE;
paint_tool->flags |= TOOL_CAN_HANDLE_CHANGING_BRUSH;
}
static void
gimp_pencil_tool_paint (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintState state)
{
PaintPressureOptions *pressure_options;
gboolean incremental;
if (pencil_options)
{
pressure_options = pencil_options->pressure_options;
incremental = pencil_options->incremental;
}
else
{
pressure_options = &non_gui_pressure_options;
incremental = non_gui_incremental;
}
switch (state)
{
case INIT_PAINT:
break;
case MOTION_PAINT:
gimp_pencil_tool_motion (paint_tool, drawable,
pressure_options, incremental);
break;
case FINISH_PAINT:
break;
default:
break;
}
}
static void
gimp_pencil_tool_motion (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintPressureOptions *pressure_options,
gboolean incremental)
{
GimpImage *gimage;
GimpContext *context;
TempBuf *area;
guchar col[MAX_CHANNELS];
gint opacity;
gdouble scale;
PaintApplicationMode paint_appl_mode = incremental ? INCREMENTAL : CONSTANT;
if (! (gimage = gimp_drawable_gimage (drawable)))
return;
context = gimp_get_current_context (gimage->gimp);
if (pressure_options->size)
scale = paint_tool->curpressure;
else
scale = 1.0;
/* Get a region which can be used to paint to */
if (! (area = gimp_paint_tool_get_paint_area (paint_tool, drawable, scale)))
return;
/* color the pixels */
if (pressure_options->color)
{
GimpRGB color;
gimp_gradient_get_color_at (gimp_context_get_gradient (context),
paint_tool->curpressure, &color);
gimp_rgba_get_uchar (&color,
&col[RED_PIX],
&col[GREEN_PIX],
&col[BLUE_PIX],
&col[ALPHA_PIX]);
paint_appl_mode = INCREMENTAL;
color_pixels (temp_buf_data (area), col,
area->width * area->height, area->bytes);
}
else if (paint_tool->brush && paint_tool->brush->pixmap)
{
/* if its a pixmap, do pixmap stuff */
gimp_paint_tool_color_area_with_pixmap (paint_tool, gimage, drawable,
area, scale, HARD);
paint_appl_mode = INCREMENTAL;
}
else
{
gimp_image_get_foreground (gimage, drawable, col);
col[area->bytes - 1] = OPAQUE_OPACITY;
color_pixels (temp_buf_data (area), col,
area->width * area->height, area->bytes);
}
opacity = 255 * gimp_context_get_opacity (context);
if (pressure_options->opacity)
opacity = opacity * 2.0 * paint_tool->curpressure;
/* paste the newly painted canvas to the gimage which is being worked on */
gimp_paint_tool_paste_canvas (paint_tool, drawable,
MIN (opacity, 255),
gimp_context_get_opacity (context) * 255,
gimp_context_get_paint_mode (context),
HARD, scale, paint_appl_mode);
}
/* non-gui stuff */
gboolean
pencil_non_gui (GimpDrawable *drawable,
gint num_strokes,
gdouble *stroke_array)
{
static GimpPencilTool *non_gui_pencil = NULL;
GimpPaintTool *paint_tool;
gint i;
if (! non_gui_pencil)
{
non_gui_pencil = g_object_new (GIMP_TYPE_PENCIL_TOOL, NULL);
}
paint_tool = GIMP_PAINT_TOOL (non_gui_pencil);
if (gimp_paint_tool_start (paint_tool, drawable,
stroke_array[0],
stroke_array[1]))
{
paint_tool->startx = paint_tool->lastx = stroke_array[0];
paint_tool->starty = paint_tool->lasty = stroke_array[1];
gimp_pencil_tool_paint (paint_tool, drawable, MOTION_PAINT);
for (i = 1; i < num_strokes; i++)
{
paint_tool->curx = stroke_array[i * 2 + 0];
paint_tool->cury = stroke_array[i * 2 + 1];
gimp_paint_tool_interpolate (paint_tool, drawable);
paint_tool->lastx = paint_tool->curx;
paint_tool->lasty = paint_tool->cury;
}
gimp_paint_tool_finish (paint_tool, drawable);
return TRUE;
}
return FALSE;
}
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