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gimp/app/paint/gimpconvolve.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 <gdk/gdkkeysyms.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "base/pixel-region.h"
#include "base/temp-buf.h"
#include "core/gimp.h"
#include "core/gimpbrush.h"
#include "core/gimpcontext.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "paint-funcs/paint-funcs.h"
#include "gimpconvolvetool.h"
#include "paint_options.h"
#include "tool_manager.h"
#include "tool_options.h"
#include "drawable.h"
#include "gdisplay.h"
#include "libgimp/gimpintl.h"
#define WANT_BLUR_BITS
#include "icons.h"
#define FIELD_COLS 4
#define MIN_BLUR 64 /* (8/9 original pixel) */
#define MAX_BLUR 0.25 /* (1/33 original pixel) */
#define MIN_SHARPEN -512
#define MAX_SHARPEN -64
/* defaults */
#define DEFAULT_CONVOLVE_RATE 50.0
#define DEFAULT_CONVOLVE_TYPE BLUR_CONVOLVE
/* Different clip relationships between a blur-blob and edges:
see convolve_motion */
typedef enum
{
CONVOLVE_NCLIP, /* Left or top edge */
CONVOLVE_NOT_CLIPPED, /* No edges */
CONVOLVE_PCLIP /* Right or bottom edge */
} ConvolveClipType;
/* the convolve structures */
typedef struct _ConvolveOptions ConvolveOptions;
struct _ConvolveOptions
{
PaintOptions paint_options;
ConvolveType type;
ConvolveType type_d;
GtkWidget *type_w[2];
gdouble rate;
gdouble rate_d;
GtkObject *rate_w;
};
/* forward function declarations */
static void gimp_convolve_tool_class_init (GimpConvolveToolClass *klass);
static void gimp_convolve_tool_init (GimpConvolveTool *tool);
static void calculate_matrix (ConvolveType type,
gdouble rate);
static void integer_matrix (gfloat *source,
gint *dest,
gint size);
static void copy_matrix (gfloat *src,
gfloat *dest,
gint size);
static gint sum_matrix (gint *matrix,
gint size);
static void gimp_convolve_tool_paint (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintState state);
static void gimp_convolve_tool_cursor_update (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp);
static void gimp_convolve_tool_modifier_key (GimpTool *tool,
GdkEventKey *kevent,
GDisplay *gdisp);
static void gimp_convolve_tool_motion (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintPressureOptions *pressure_options,
ConvolveType type,
gdouble rate);
static ConvolveOptions * convolve_options_new (void);
static void convolve_options_reset (ToolOptions *options);
/* The parent class */
static GimpPaintToolClass *parent_class;
/* the convolve tool options */
static ConvolveOptions * convolve_options = NULL;
/* local variables */
static gint matrix [25];
static gint matrix_size;
static gint matrix_divisor;
static ConvolveType non_gui_type;
static gdouble non_gui_rate;
static gfloat custom_matrix [25] =
{
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
0, 0, 1, 0, 0,
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
};
static gfloat blur_matrix [25] =
{
0, 0, 0, 0, 0,
0, 1, 1, 1, 0,
0, 1, MIN_BLUR, 1, 0,
0, 1, 1, 1, 0,
0, 0 ,0, 0, 0,
};
static gfloat sharpen_matrix [25] =
{
0, 0, 0, 0, 0,
0, 1, 1, 1, 0,
0, 1, MIN_SHARPEN, 1, 0,
0, 1, 1, 1, 0,
0, 0, 0, 0, 0,
};
/* global functions */
void
gimp_convolve_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_CONVOLVE_TOOL,
TRUE,
"gimp:convolve_tool",
_("Convolve"),
_("Blur or Sharpen"),
N_("/Tools/Paint Tools/Convolve"), "B",
NULL, "tools/convolve.html",
(const gchar **) blur_bits);
}
GtkType
gimp_convolve_tool_get_type (void)
{
static GtkType tool_type = 0;
if (! tool_type)
{
GtkTypeInfo tool_info =
{
"GimpConvolveTool",
sizeof (GimpConvolveTool),
sizeof (GimpConvolveToolClass),
(GtkClassInitFunc) gimp_convolve_tool_class_init,
(GtkObjectInitFunc) gimp_convolve_tool_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
NULL
};
tool_type = gtk_type_unique (GIMP_TYPE_PAINT_TOOL, &tool_info);
}
return tool_type;
}
/* static functions */
static void
gimp_convolve_tool_class_init (GimpConvolveToolClass *klass)
{
GimpPaintToolClass *paint_tool_class;
GimpDrawToolClass *draw_tool_class;
GimpToolClass *tool_class;
paint_tool_class = (GimpPaintToolClass *) klass;
draw_tool_class = (GimpDrawToolClass *) klass;
tool_class = (GimpToolClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_PAINT_TOOL);
tool_class->cursor_update = gimp_convolve_tool_cursor_update;
tool_class->modifier_key = gimp_convolve_tool_modifier_key;
paint_tool_class->paint = gimp_convolve_tool_paint;
}
static void
gimp_convolve_tool_init (GimpConvolveTool *convolve)
{
GimpTool *tool;
GimpPaintTool *paint_tool;
tool = GIMP_TOOL (convolve);
paint_tool = GIMP_PAINT_TOOL (convolve);
if (! convolve_options)
{
convolve_options = convolve_options_new ();
tool_manager_register_tool_options (GIMP_TYPE_CONVOLVE_TOOL,
(ToolOptions *) convolve_options);
}
tool->tool_cursor = GIMP_BLUR_TOOL_CURSOR;
}
static void
gimp_convolve_tool_paint (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintState state)
{
switch (state)
{
case MOTION_PAINT:
gimp_convolve_tool_motion (paint_tool, drawable,
convolve_options->paint_options.pressure_options,
convolve_options->type,
convolve_options->rate);
break;
default:
break;
}
}
static void
gimp_convolve_tool_modifier_key (GimpTool *tool,
GdkEventKey *kevent,
GDisplay *gdisp)
{
switch (kevent->keyval)
{
case GDK_Alt_L:
case GDK_Alt_R:
break;
case GDK_Shift_L:
case GDK_Shift_R:
if (kevent->state & GDK_CONTROL_MASK) /* reset tool toggle */
{
switch (convolve_options->type)
{
case BLUR_CONVOLVE:
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (convolve_options->type_w[SHARPEN_CONVOLVE]),
TRUE);
break;
case SHARPEN_CONVOLVE:
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (convolve_options->type_w[BLUR_CONVOLVE]),
TRUE);
break;
default:
break;
}
}
break;
case GDK_Control_L:
case GDK_Control_R:
if ( !(kevent->state & GDK_SHIFT_MASK) ) /* shift enables line draw mode */
{
switch (convolve_options->type)
{
case BLUR_CONVOLVE:
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (convolve_options->type_w[SHARPEN_CONVOLVE]),
TRUE);
break;
case SHARPEN_CONVOLVE:
gtk_toggle_button_set_active
(GTK_TOGGLE_BUTTON (convolve_options->type_w[BLUR_CONVOLVE]),
TRUE);
break;
default:
break;
}
}
break;
}
tool->toggled = (convolve_options->type == SHARPEN_CONVOLVE);
}
static void
gimp_convolve_tool_cursor_update (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp)
{
tool->toggled = (convolve_options->type == SHARPEN_CONVOLVE);
if (GIMP_TOOL_CLASS (parent_class)->cursor_update)
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, mevent, gdisp);
}
static void
gimp_convolve_tool_motion (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintPressureOptions *pressure_options,
ConvolveType type,
double rate)
{
TempBuf *area;
guchar *temp_data;
PixelRegion srcPR;
PixelRegion destPR;
gdouble scale;
ConvolveClipType area_hclip = CONVOLVE_NOT_CLIPPED;
ConvolveClipType area_vclip = CONVOLVE_NOT_CLIPPED;
gint marginx = 0;
gint marginy = 0;
GimpContext *context;
if (! gimp_drawable_gimage (drawable))
return;
/* If the image type is indexed, don't convolve */
if (gimp_drawable_is_indexed (drawable))
return;
/* If the brush is smaller than the convolution matrix, don't convolve */
if ((paint_tool->brush->mask->width < matrix_size) ||
(paint_tool->brush->mask->height < matrix_size))
return;
if (pressure_options->size)
scale = paint_tool->curpressure;
else
scale = 1.0;
/* Get image region around current brush (mask bbox + 1 pixel) */
if (! (area = gimp_paint_tool_get_paint_area (paint_tool, drawable, scale)))
return;
/* configure the source pixel region */
pixel_region_init (&srcPR, gimp_drawable_data (drawable),
area->x, area->y, area->width, area->height, FALSE);
/* Configure the destination pixel region - a paint_core TempBuf */
destPR.bytes = area->bytes;
destPR.tiles = NULL;
destPR.x = 0;
destPR.y = 0;
destPR.w = area->width;
destPR.h = area->height;
destPR.rowstride = area->width * destPR.bytes;
destPR.data = temp_buf_data (area);
if (pressure_options->rate)
rate = rate * 2.0 * paint_tool->curpressure;
calculate_matrix (type, rate);
/* Image region near edges? If so, paint area will be clipped */
/* with respect to brush mask + 1 pixel border (# 19285) */
if ((marginx = (gint) paint_tool->curx - paint_tool->brush->mask->width / 2 - 1) != area->x)
area_hclip = CONVOLVE_NCLIP;
else if ((marginx = area->width - paint_tool->brush->mask->width - 2) != 0)
area_hclip = CONVOLVE_PCLIP;
if ((marginy = (gint) paint_tool->cury - paint_tool->brush->mask->height / 2 - 1) != area->y)
area_vclip = CONVOLVE_NCLIP;
else if ((marginy = area->height - paint_tool->brush->mask->height - 2) != 0)
area_vclip = CONVOLVE_PCLIP;
/* Has the TempBuf been clipped by a canvas edge or two ? */
if ((area_hclip == CONVOLVE_NOT_CLIPPED) &&
(area_vclip == CONVOLVE_NOT_CLIPPED))
{
/* No clipping... */
/* Standard case: copy src to temp. convolve temp to dest. */
/* Brush defines pipe size and no edge adjustments are needed. */
/* If the source has no alpha, then add alpha pixels */
/* Because paint_core.c is alpha-only code. See below. */
PixelRegion tempPR;
tempPR.x = 0;
tempPR.y = 0;
tempPR.w = area->width;
tempPR.h = area->height;
tempPR.tiles = NULL;
if (! gimp_drawable_has_alpha (drawable))
{
/* note: this particular approach needlessly convolves the totally-
opaque alpha channel. A faster approach would be to keep
tempPR the same number of bytes as srcPR, and extend the
paint_core_replace_canvas API to handle non-alpha images. */
tempPR.bytes = srcPR.bytes + 1;
tempPR.rowstride = tempPR.bytes * tempPR.w;
temp_data = g_malloc (tempPR.h * tempPR.rowstride);
tempPR.data = temp_data;
add_alpha_region (&srcPR, &tempPR);
}
else
{
tempPR.bytes = srcPR.bytes;
tempPR.rowstride = tempPR.bytes * tempPR.w;
temp_data = g_malloc (tempPR.h * tempPR.rowstride);
tempPR.data = temp_data;
copy_region (&srcPR, &tempPR);
}
/* Convolve the region */
tempPR.x = 0;
tempPR.y = 0;
tempPR.w = area->width;
tempPR.h = area->height;
tempPR.data = temp_data;
convolve_region (&tempPR, &destPR, matrix, matrix_size,
matrix_divisor, NORMAL_CONVOL);
/* Free the allocated temp space */
g_free (temp_data);
}
else
{
/* TempBuf clipping has occured on at least one edge...
* Edge case: expand area under brush margin px on near edge(s), convolve
* expanded buffers. copy src -> ovrsz1 convolve ovrsz1 -> ovrsz2
* copy-with-crop ovrsz2 -> dest
*/
PixelRegion ovrsz1PR;
PixelRegion ovrsz2PR;
guchar *ovrsz1_data = NULL;
guchar *ovrsz2_data = NULL;
guchar *fillcolor;
fillcolor = gimp_drawable_get_color_at
(drawable,
CLAMP ((gint) paint_tool->curx, 0, gimp_drawable_width (drawable) - 1),
CLAMP ((gint) paint_tool->cury, 0, gimp_drawable_height (drawable) - 1));
marginx *= (marginx < 0) ? -1 : 0;
marginy *= (marginy < 0) ? -1 : 0;
ovrsz2PR.x = 0;
ovrsz2PR.y = 0;
ovrsz2PR.w = area->width + marginx;
ovrsz2PR.h = area->height + marginy;
ovrsz2PR.bytes = (gimp_drawable_has_alpha (drawable))? srcPR.bytes : srcPR.bytes + 1;
ovrsz2PR.offx = 0;
ovrsz2PR.offy = 0;
ovrsz2PR.rowstride = ovrsz2PR.bytes * ovrsz2PR.w;
ovrsz2PR.tiles = NULL;
ovrsz2_data = g_malloc (ovrsz2PR.h * ovrsz2PR.rowstride);
ovrsz2PR.data = ovrsz2_data;
ovrsz1PR.x = 0;
ovrsz1PR.y = 0;
ovrsz1PR.w = area->width + marginx;
ovrsz1PR.h = area->height + marginy;
ovrsz1PR.bytes = (gimp_drawable_has_alpha (drawable))? srcPR.bytes : srcPR.bytes + 1;
ovrsz1PR.offx = 0;
ovrsz1PR.offy = 0;
ovrsz1PR.rowstride = ovrsz2PR.bytes * ovrsz2PR.w;
ovrsz1PR.tiles = NULL;
ovrsz1_data = g_malloc (ovrsz1PR.h * ovrsz1PR.rowstride);
ovrsz1PR.data = ovrsz1_data;
color_region (&ovrsz1PR, (const guchar *)fillcolor);
ovrsz1PR.x = (area_hclip == CONVOLVE_NCLIP)? marginx : 0;
ovrsz1PR.y = (area_vclip == CONVOLVE_NCLIP)? marginy : 0;
ovrsz1PR.w = area->width;
ovrsz1PR.h = area->height;
ovrsz1PR.data = ovrsz1_data + (ovrsz1PR.rowstride * ovrsz1PR.y) + (ovrsz1PR.bytes * ovrsz1PR.x);
if (! gimp_drawable_has_alpha (drawable))
add_alpha_region (&srcPR, &ovrsz1PR);
else
copy_region (&srcPR, &ovrsz1PR);
/* Convolve the region */
ovrsz1PR.x = 0;
ovrsz1PR.y = 0;
ovrsz1PR.w = area->width + marginx;
ovrsz1PR.h = area->height + marginy;
ovrsz1PR.data = ovrsz1_data;
convolve_region (&ovrsz1PR, &ovrsz2PR, matrix, matrix_size,
matrix_divisor, NORMAL_CONVOL);
/* Crop and copy to destination */
ovrsz2PR.x = (area_hclip == CONVOLVE_NCLIP)? marginx : 0;
ovrsz2PR.y = (area_vclip == CONVOLVE_NCLIP)? marginy : 0;
ovrsz2PR.w = area->width;
ovrsz2PR.h = area->height;
ovrsz2PR.data = ovrsz2_data + (ovrsz2PR.rowstride * ovrsz2PR.y) + (ovrsz2PR.bytes * ovrsz2PR.x);
copy_region (&ovrsz2PR, &destPR);
g_free(ovrsz1_data);
g_free(ovrsz2_data);
g_free(fillcolor);
}
context = gimp_get_current_context (gimp_drawable_gimage (drawable)->gimp);
/* paste the newly painted canvas to the gimage which is being worked on */
gimp_paint_tool_replace_canvas (paint_tool, drawable, OPAQUE_OPACITY,
(gint) (gimp_context_get_opacity (context) * 255),
pressure_options->pressure ? PRESSURE : SOFT,
scale, INCREMENTAL);
}
static void
calculate_matrix (ConvolveType type,
gdouble rate)
{
gfloat percent;
/* find percent of tool pressure */
percent = MIN (rate / 100.0, 1.0);
/* get the appropriate convolution matrix and size and divisor */
switch (type)
{
case BLUR_CONVOLVE:
matrix_size = 5;
blur_matrix [12] = MIN_BLUR + percent * (MAX_BLUR - MIN_BLUR);
copy_matrix (blur_matrix, custom_matrix, matrix_size);
break;
case SHARPEN_CONVOLVE:
matrix_size = 5;
sharpen_matrix [12] = MIN_SHARPEN + percent * (MAX_SHARPEN - MIN_SHARPEN);
copy_matrix (sharpen_matrix, custom_matrix, matrix_size);
break;
case CUSTOM_CONVOLVE:
matrix_size = 5;
break;
}
integer_matrix (custom_matrix, matrix, matrix_size);
matrix_divisor = sum_matrix (matrix, matrix_size);
if (!matrix_divisor)
matrix_divisor = 1;
}
static void
integer_matrix (gfloat *source,
gint *dest,
gint size)
{
gint i;
#define PRECISION 10000
for (i = 0; i < size*size; i++)
*dest++ = (gint) (*source ++ * PRECISION);
}
static void
copy_matrix (gfloat *src,
gfloat *dest,
gint size)
{
gint i;
for (i = 0; i < size*size; i++)
*dest++ = *src++;
}
static gint
sum_matrix (gint *matrix,
gint size)
{
gint sum = 0;
size *= size;
while (size --)
sum += *matrix++;
return sum;
}
#if 0 /* Leave these to the STUBs */
static gpointer
convolve_non_gui_paint_func (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintState state)
{
convolve_motion (paint_tool, drawable, &non_gui_pressure_options,
non_gui_type, non_gui_rate);
return NULL;
}
gboolean
convolve_non_gui_default (GimpDrawable *drawable,
gint num_strokes,
gdouble *stroke_array)
{
gdouble rate = DEFAULT_CONVOLVE_RATE;
ConvolveType type = DEFAULT_CONVOLVE_TYPE;
ConvolveOptions *options = convolve_options;
if (options)
{
rate = options->rate;
type = options->type;
}
return convolve_non_gui (drawable, rate, type, num_strokes, stroke_array);
}
gboolean
convolve_non_gui (GimpDrawable *drawable,
gdouble rate,
ConvolveType type,
gint num_strokes,
gdouble *stroke_array)
{
gint i;
if (gimp_paint_tool_init (&non_gui_paint_core, drawable,
stroke_array[0], stroke_array[1]))
{
non_gui_type = type;
non_gui_rate = rate;
non_gui_paint_core.startx = non_gui_paint_core.lastx = stroke_array[0];
non_gui_paint_core.starty = non_gui_paint_core.lasty = stroke_array[1];
convolve_non_gui_paint_func (&non_gui_paint_core, drawable, 0);
for (i = 1; i < num_strokes; i++)
{
non_gui_paint_core.curx = stroke_array[i * 2 + 0];
non_gui_paint_core.cury = stroke_array[i * 2 + 1];
paint_core_interpolate (&non_gui_paint_core, drawable);
non_gui_paint_core.lastx = non_gui_paint_core.curx;
non_gui_paint_core.lasty = non_gui_paint_core.cury;
}
paint_core_finish (&non_gui_paint_core, drawable, -1);
paint_core_cleanup ();
return TRUE;
}
return FALSE;
}
#endif /* 0 - non-gui functions */
static ConvolveOptions *
convolve_options_new (void)
{
ConvolveOptions *options;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *scale;
GtkWidget *frame;
options = g_new0 (ConvolveOptions, 1);
paint_options_init ((PaintOptions *) options,
GIMP_TYPE_CONVOLVE_TOOL,
convolve_options_reset);
options->type = options->type_d = DEFAULT_CONVOLVE_TYPE;
options->rate = options->rate_d = DEFAULT_CONVOLVE_RATE;
/* the main vbox */
vbox = ((ToolOptions *) options)->main_vbox;
/* the rate scale */
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new (_("Rate:"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0);
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
options->rate_w =
gtk_adjustment_new (options->rate_d, 0.0, 100.0, 1.0, 1.0, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (options->rate_w));
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (options->rate_w), "value_changed",
GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
&options->rate);
gtk_widget_show (scale);
gtk_widget_show (hbox);
frame = gimp_radio_group_new2 (TRUE, _("Convolve Type"),
gimp_radio_button_update,
&options->type, (gpointer) options->type,
_("Blur"), (gpointer) BLUR_CONVOLVE,
&options->type_w[0],
_("Sharpen"), (gpointer) SHARPEN_CONVOLVE,
&options->type_w[1],
NULL);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
return options;
}
static void
convolve_options_reset (ToolOptions *tool_options)
{
ConvolveOptions *options;
options = (ConvolveOptions *) tool_options;
paint_options_reset (tool_options);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->rate_w),
options->rate_d);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->type_w[options->type_d]), TRUE);
}
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