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gimp/app/convolve.c
Sven Neumann 746c37eb7e moved the new enum Garry introduced recently from the header to the .c 
2000-11-06  Sven Neumann  <sven@gimp.org>

	* app/convolve.[ch]: moved the new enum Garry introduced recently
	from the header to the .c file so it does not get exported to the
	PDB by enumgen.pl.

and some updates to the italian translation as sent by Daniele Medri.
2000-11-06 12:40:07 +00:00

675 lines
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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 <gdk/gdkkeysyms.h>
#include "appenv.h"
#include "drawable.h"
#include "convolve.h"
#include "gdisplay.h"
#include "gimpui.h"
#include "paint_funcs.h"
#include "paint_core.h"
#include "paint_options.h"
#include "selection.h"
#include "tools.h"
#include "gimage.h"
#include "libgimp/gimpintl.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;
};
/* 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,
};
/* forward function declarations */
static void calculate_matrix (ConvolveType, double);
static void integer_matrix (float *, int *, int);
static void copy_matrix (float *, float *, int);
static int sum_matrix (int *, int);
static void convolve_motion (PaintCore *, GimpDrawable *,
PaintPressureOptions *,
ConvolveType, double);
/* functions */
static void
convolve_options_reset (void)
{
ConvolveOptions *options = convolve_options;
paint_options_reset ((PaintOptions *) 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);
}
static ConvolveOptions *
convolve_options_new (void)
{
ConvolveOptions *options;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *scale;
GtkWidget *frame;
/* the new convolve tool options structure */
options = g_new (ConvolveOptions, 1);
paint_options_init ((PaintOptions *) options,
CONVOLVE,
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;
}
void *
convolve_paint_func (PaintCore *paint_core,
GimpDrawable *drawable,
int state)
{
switch (state)
{
case MOTION_PAINT:
convolve_motion (paint_core, drawable,
convolve_options->paint_options.pressure_options,
convolve_options->type, convolve_options->rate);
break;
}
return NULL;
}
static void
convolve_modifier_key_func (Tool *tool,
GdkEventKey *kevent,
gpointer gdisp_ptr)
{
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
convolve_cursor_update_func (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
tool->toggled = (convolve_options->type == SHARPEN_CONVOLVE);
paint_core_cursor_update (tool, mevent, gdisp_ptr);
}
Tool *
tools_new_convolve (void)
{
Tool * tool;
PaintCore * private;
/* The tool options */
if (! convolve_options)
{
convolve_options = convolve_options_new ();
tools_register (CONVOLVE, (ToolOptions *) convolve_options);
/* press all default buttons */
convolve_options_reset ();
}
tool = paint_core_new (CONVOLVE);
tool->modifier_key_func = convolve_modifier_key_func;
tool->cursor_update_func = convolve_cursor_update_func;
private = (PaintCore *) tool->private;
private->paint_func = convolve_paint_func;
return tool;
}
void
tools_free_convolve (Tool *tool)
{
paint_core_free (tool);
}
static void
convolve_motion (PaintCore *paint_core,
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;
if (!drawable_gimage (drawable))
return;
/* If the image type is indexed, don't convolve */
if ((drawable_type (drawable) == INDEXED_GIMAGE) ||
(drawable_type (drawable) == INDEXEDA_GIMAGE))
return;
/* If the brush is smaller than the convolution matrix, don't convolve */
if((paint_core->brush->mask->width < matrix_size) || (paint_core->brush->mask->height < matrix_size))
return;
if (pressure_options->size)
scale = paint_core->curpressure;
else
scale = 1.0;
/* Get image region around current brush (mask bbox + 1 pixel) */
if (! (area = paint_core_get_paint_area (paint_core, drawable, scale)))
return;
/* configure the source pixel region */
pixel_region_init (&srcPR, 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_core->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_core->curx - paint_core->brush->mask->width/2 - 1) != area->x)
area_hclip = CONVOLVE_NCLIP;
else
if((marginx = area->width - paint_core->brush->mask->width - 2) != 0)
area_hclip = CONVOLVE_PCLIP;
if((marginy = (gint)paint_core->cury - paint_core->brush->mask->height/2 - 1) != area->y)
area_vclip = CONVOLVE_NCLIP;
else
if((marginy = area->height - paint_core->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 (!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 = gimp_drawable_get_color_at (drawable,
CLAMP ((gint) paint_core->curx, 0, gimp_drawable_width (drawable) - 1),
CLAMP ((gint) paint_core->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 = (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 = (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 (!(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);
}
/* paste the newly painted canvas to the gimage which is being worked on */
paint_core_replace_canvas (paint_core, drawable, OPAQUE_OPACITY,
(int) (gimp_context_get_opacity (NULL) * 255),
pressure_options->pressure ? PRESSURE : SOFT,
scale, INCREMENTAL);
}
static void
calculate_matrix (ConvolveType type,
double rate)
{
float 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 (float *source,
int *dest,
int size)
{
int i;
#define PRECISION 10000
for (i = 0; i < size*size; i++)
*dest++ = (int) (*source ++ * PRECISION);
}
static void
copy_matrix (float *src,
float *dest,
int size)
{
int i;
for (i = 0; i < size*size; i++)
*dest++ = *src++;
}
static int
sum_matrix (int *matrix,
int size)
{
int sum = 0;
size *= size;
while (size --)
sum += *matrix++;
return sum;
}
static void *
convolve_non_gui_paint_func (PaintCore *paint_core,
GimpDrawable *drawable,
int state)
{
convolve_motion (paint_core, drawable, &non_gui_pressure_options,
non_gui_type, non_gui_rate);
return NULL;
}
gboolean
convolve_non_gui_default (GimpDrawable *drawable,
int num_strokes,
double *stroke_array)
{
double 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,
double rate,
ConvolveType type,
int num_strokes,
double *stroke_array)
{
int i;
if (paint_core_init (&non_gui_paint_core, drawable,
stroke_array[0], stroke_array[1]))
{
/* Set the paint core's paint func */
non_gui_paint_core.paint_func = convolve_non_gui_paint_func;
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;
}
/* Finish the painting */
paint_core_finish (&non_gui_paint_core, drawable, -1);
/* Cleanup */
paint_core_cleanup ();
return TRUE;
}
else
return FALSE;
}
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