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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 "smudge.h"
- #include "gdisplay.h"
- #include "gimplut.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/gimpmath.h"
-
- #include "libgimp/gimpintl.h"
-
-
- /* default defines */
-
- #define SMUDGE_DEFAULT_RATE 50.0
-
- /* the smudge structures */
-
- typedef struct _SmudgeOptions SmudgeOptions;
-
- struct _SmudgeOptions
- {
- PaintOptions paint_options;
-
- gdouble rate;
- gdouble rate_d;
- GtkObject *rate_w;
- };
-
- static PixelRegion accumPR;
- static guchar *accum_data;
-
- /* the smudge tool options */
- static SmudgeOptions * smudge_options = NULL;
-
- /* local variables */
- static gdouble non_gui_rate;
-
- /* function prototypes */
- static void smudge_motion (PaintCore *, PaintPressureOptions *,
- gdouble, GimpDrawable *);
- static gboolean smudge_init (PaintCore *, GimpDrawable *);
- static void smudge_finish (PaintCore *, GimpDrawable *);
-
- static void smudge_nonclipped_painthit_coords (PaintCore *paint_core,
- gint *x,
- gint *y,
- gint *w,
- gint *h);
- static void smudge_allocate_accum_buffer (gint w,
- gint h,
- gint bytes,
- guchar *do_fill);
-
- static void
- smudge_options_reset (void)
- {
- SmudgeOptions *options = smudge_options;
-
- paint_options_reset ((PaintOptions *) options);
-
- gtk_adjustment_set_value (GTK_ADJUSTMENT (options->rate_w), options->rate_d);
- }
-
- static SmudgeOptions *
- smudge_options_new (void)
- {
- SmudgeOptions *options;
-
- GtkWidget *vbox;
- GtkWidget *hbox;
- GtkWidget *label;
- GtkWidget *scale;
-
- /* the new smudge tool options structure */
- options = g_new (SmudgeOptions, 1);
- paint_options_init ((PaintOptions *) options,
- SMUDGE,
- smudge_options_reset);
-
- options->rate = options->rate_d = SMUDGE_DEFAULT_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);
-
- return options;
- }
-
- void *
- smudge_paint_func (PaintCore *paint_core,
- GimpDrawable *drawable,
- int state)
- {
- /* initialization fails if the user starts outside the drawable */
- static gboolean initialized = FALSE;
-
- switch (state)
- {
- case MOTION_PAINT:
- if (!initialized)
- initialized = smudge_init (paint_core, drawable);
- if (initialized)
- smudge_motion (paint_core, smudge_options->paint_options.pressure_options,
- smudge_options->rate, drawable);
- break;
- case FINISH_PAINT:
- smudge_finish (paint_core, drawable);
- initialized = FALSE;
- break;
- }
-
- return NULL;
- }
-
- static void
- smudge_finish (PaintCore *paint_core,
- GimpDrawable *drawable)
- {
- if (accum_data)
- {
- g_free (accum_data);
- accum_data = NULL;
- }
- }
-
- static void
- smudge_nonclipped_painthit_coords (PaintCore *paint_core,
- gint *x,
- gint *y,
- gint *w,
- gint *h)
- {
- /* Note: these are the brush mask size plus a border of 1 pixel */
- *x = (gint) paint_core->curx - paint_core->brush->mask->width/2 - 1;
- *y = (gint) paint_core->cury - paint_core->brush->mask->height/2 - 1;
- *w = paint_core->brush->mask->width + 2;
- *h = paint_core->brush->mask->height + 2;
- }
-
- static gboolean
- smudge_init (PaintCore *paint_core,
- GimpDrawable *drawable)
- {
- GImage *gimage;
- TempBuf *area;
- PixelRegion srcPR;
- gint x, y, w, h;
- gint was_clipped;
- guchar *do_fill = NULL;
-
- if (! (gimage = drawable_gimage (drawable)))
- return FALSE;
-
- /* If the image type is indexed, don't smudge */
- if ((drawable_type (drawable) == INDEXED_GIMAGE) ||
- (drawable_type (drawable) == INDEXEDA_GIMAGE))
- return FALSE;
-
- area = paint_core_get_paint_area (paint_core, drawable, 1.0);
-
- if (!area)
- return FALSE;
-
- /* adjust the x and y coordinates to the upper left corner of the brush */
- smudge_nonclipped_painthit_coords (paint_core, &x, &y, &w, &h);
-
- if (x != area->x || y != area->y || w != area->width || h != area->height)
- was_clipped = TRUE;
- else
- was_clipped = FALSE;
-
- /* When clipped, accum_data may contain pixels that map to
- off-canvas pixels of the under-the-brush image, particulary
- when the brush image contains an edge or corner of the
- image. These off-canvas pixels are not a part of the current
- composite, but may be composited in later generations. do_fill
- contains a copy of the color of the pixel at the center of the
- brush; assumed this is a reasonable choice for off- canvas pixels
- that may enter into the blend */
-
- if (was_clipped)
- do_fill = 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));
-
- smudge_allocate_accum_buffer (w, h, gimp_drawable_bytes (drawable), do_fill);
-
- accumPR.x = area->x - x;
- accumPR.y = area->y - y;
- accumPR.w = area->width;
- accumPR.h = area->height;
- accumPR.rowstride = accumPR.bytes * w;
- accumPR.data = accum_data
- + accumPR.rowstride * accumPR.y
- + accumPR.x * accumPR.bytes;
-
- pixel_region_init (&srcPR, drawable_data (drawable),
- area->x, area->y, area->width, area->height, FALSE);
-
- /* copy the region under the original painthit. */
- copy_region (&srcPR, &accumPR);
-
- accumPR.x = area->x - x;
- accumPR.y = area->y - y;
- accumPR.w = area->width;
- accumPR.h = area->height;
- accumPR.rowstride = accumPR.bytes * w;
- accumPR.data = accum_data
- + accumPR.rowstride * accumPR.y
- + accumPR.x * accumPR.bytes;
-
- if (do_fill)
- g_free(do_fill);
-
- return TRUE;
- }
-
- static void
- smudge_allocate_accum_buffer (gint w,
- gint h,
- gint bytes,
- guchar *do_fill)
- {
- /* Allocate the accumulation buffer */
- accumPR.bytes = bytes;
- accum_data = g_malloc (w * h * bytes);
-
- if (do_fill != NULL)
- {
- /* guchar color[3] = {0,0,0}; */
- accumPR.x = 0;
- accumPR.y = 0;
- accumPR.w = w;
- accumPR.h = h;
- accumPR.rowstride = accumPR.bytes * w;
- accumPR.data = accum_data;
- color_region (&accumPR, (const guchar*)do_fill);
- }
- }
-
- Tool *
- tools_new_smudge (void)
- {
- Tool * tool;
- PaintCore * private;
-
- /* The tool options */
- if (! smudge_options)
- {
- smudge_options = smudge_options_new ();
- tools_register (SMUDGE, (ToolOptions *) smudge_options);
-
- /* press all default buttons */
- smudge_options_reset ();
- }
-
- tool = paint_core_new (SMUDGE);
- /*tool->modifier_key_func = smudge_modifier_key_func;*/
-
- private = (PaintCore *) tool->private;
- private->paint_func = smudge_paint_func;
-
- return tool;
- }
-
- void
- tools_free_smudge (Tool *tool)
- {
- paint_core_free (tool);
- }
-
- static void
- smudge_motion (PaintCore *paint_core,
- PaintPressureOptions *pressure_options,
- gdouble smudge_rate,
- GimpDrawable *drawable)
- {
- GImage *gimage;
- TempBuf * area;
- PixelRegion srcPR, destPR, tempPR;
- gdouble rate;
- gint opacity;
- gint x,y,w,h;
-
- if (! (gimage = drawable_gimage (drawable)))
- return;
-
- /* If the image type is indexed, don't smudge */
- if ((drawable_type (drawable) == INDEXED_GIMAGE) ||
- (drawable_type (drawable) == INDEXEDA_GIMAGE))
- return;
-
- smudge_nonclipped_painthit_coords (paint_core, &x, &y, &w, &h);
-
- /* Get the paint area */
- /* Smudge won't scale! */
- if (! (area = paint_core_get_paint_area (paint_core, drawable, 1.0)))
- return;
-
- /* srcPR will be the pixels under the current painthit from
- the drawable*/
-
- pixel_region_init (&srcPR, drawable_data (drawable),
- area->x, area->y, area->width, area->height, FALSE);
-
- /* Enable pressure sensitive rate */
- if (pressure_options->rate)
- rate = MIN (smudge_rate / 100.0 * paint_core->curpressure * 2.0, 1.0);
- else
- rate = smudge_rate / 100.0;
-
- /* The tempPR will be the built up buffer (for smudge) */
- tempPR.bytes = accumPR.bytes;
- tempPR.rowstride = accumPR.rowstride;
- tempPR.x = area->x - x;
- tempPR.y = area->y - y;
- tempPR.w = area->width;
- tempPR.h = area->height;
- tempPR.data = accum_data +
- tempPR.rowstride * tempPR.y + tempPR.x * tempPR.bytes;
-
- /* The dest will be the paint area we got above (= canvas_buf) */
-
- destPR.bytes = area->bytes;
- destPR.x = 0; destPR.y = 0;
- destPR.w = area->width;
- destPR.h = area->height;
- destPR.rowstride = area->width * area->bytes;
- destPR.data = temp_buf_data (area);
-
- /*
- Smudge uses the buffer Accum.
- For each successive painthit Accum is built like this
- Accum = rate*Accum + (1-rate)*I.
- where I is the pixels under the current painthit.
- Then the paint area (canvas_buf) is built as
- (Accum,1) (if no alpha),
- */
-
- blend_region (&srcPR, &tempPR, &tempPR, ROUND (rate * 255.0));
-
- /* re-init the tempPR */
-
- tempPR.bytes = accumPR.bytes;
- tempPR.rowstride = accumPR.rowstride;
- tempPR.x = area->x - x;
- tempPR.y = area->y - y;
- tempPR.w = area->width;
- tempPR.h = area->height;
- tempPR.data = accum_data
- + tempPR.rowstride * tempPR.y
- + tempPR.x * tempPR.bytes;
-
- if (!drawable_has_alpha (drawable))
- add_alpha_region (&tempPR, &destPR);
- else
- copy_region (&tempPR, &destPR);
-
- opacity = 255 * gimp_context_get_opacity (NULL);
- if (pressure_options->opacity)
- opacity = opacity * 2.0 * paint_core->curpressure;
-
- /*Replace the newly made paint area to the gimage*/
- paint_core_replace_canvas (paint_core, drawable,
- MIN (opacity, 255),
- OPAQUE_OPACITY,
- pressure_options->pressure ? PRESSURE : SOFT,
- 1.0, INCREMENTAL);
- }
-
- static void *
- smudge_non_gui_paint_func (PaintCore *paint_core,
- GimpDrawable *drawable,
- int state)
- {
- smudge_motion (paint_core, &non_gui_pressure_options, non_gui_rate, drawable);
-
- return NULL;
- }
-
- gboolean
- smudge_non_gui_default (GimpDrawable *drawable,
- int num_strokes,
- double *stroke_array)
- {
- gdouble rate = SMUDGE_DEFAULT_RATE;
- SmudgeOptions *options = smudge_options;
-
- if (options)
- rate = options->rate;
-
- return smudge_non_gui (drawable, rate, num_strokes, stroke_array);
- }
-
- gboolean
- smudge_non_gui (GimpDrawable *drawable,
- gdouble rate,
- int num_strokes,
- double *stroke_array)
- {
- gint i;
-
- if (paint_core_init (&non_gui_paint_core, drawable,
- stroke_array[0], stroke_array[1]))
- {
- smudge_init (&non_gui_paint_core, drawable);
-
- /* Set the paint core's paint func */
- non_gui_paint_core.paint_func = smudge_non_gui_paint_func;
-
- non_gui_rate = rate;
-
- non_gui_paint_core.curx = non_gui_paint_core.startx =
- non_gui_paint_core.lastx = stroke_array[0];
- non_gui_paint_core.cury = non_gui_paint_core.starty =
- non_gui_paint_core.lasty = stroke_array[1];
-
- smudge_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 ();
- smudge_finish (&non_gui_paint_core, drawable);
- return TRUE;
- }
- else
- return FALSE;
- }
-