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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 "apptypes.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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