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gimp/app/core/gimpdrawable-blend.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 <stdlib.h>
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "base/tile.h"
#include "paint-funcs/paint-funcs.h"
#include "core/gimp.h"
#include "core/gimpcontext.h"
#include "core/gimpdrawable.h"
#include "core/gimpgradient.h"
#include "core/gimpimage.h"
#include "core/gimpimage-mask.h"
#include "core/gimptoolinfo.h"
#include "widgets/gimpdnd.h"
#include "app_procs.h"
#include "errors.h"
#include "gdisplay.h"
#include "gimpprogress.h"
#include "undo.h"
#include "gimpblendtool.h"
#include "paint_options.h"
#include "tool_manager.h"
#include "libgimp/gimpintl.h"
/* target size */
#define TARGET_HEIGHT 15
#define TARGET_WIDTH 15
#define STATUSBAR_SIZE 128
typedef gdouble (* RepeatFunc) (gdouble);
typedef struct _BlendOptions BlendOptions;
struct _BlendOptions
{
PaintOptions paint_options;
gdouble offset;
gdouble offset_d;
GtkObject *offset_w;
BlendMode blend_mode;
BlendMode blend_mode_d;
GtkWidget *blend_mode_w;
GradientType gradient_type;
GradientType gradient_type_d;
GtkWidget *gradient_type_w;
RepeatMode repeat;
RepeatMode repeat_d;
GtkWidget *repeat_w;
gint supersample;
gint supersample_d;
GtkWidget *supersample_w;
gint max_depth;
gint max_depth_d;
GtkObject *max_depth_w;
gdouble threshold;
gdouble threshold_d;
GtkObject *threshold_w;
};
typedef struct
{
GimpGradient *gradient;
gdouble offset;
gdouble sx, sy;
BlendMode blend_mode;
GradientType gradient_type;
GimpRGB fg, bg;
gdouble dist;
gdouble vec[2];
RepeatFunc repeat_func;
} RenderBlendData;
typedef struct
{
PixelRegion *PR;
guchar *row_data;
gint bytes;
gint width;
} PutPixelData;
/* local function prototypes */
static void gimp_blend_tool_class_init (GimpBlendToolClass *klass);
static void gimp_blend_tool_init (GimpBlendTool *blend_tool);
static void gimp_blend_tool_destroy (GtkObject *object);
static void gradient_type_callback (GtkWidget *widget,
gpointer data);
static void gimp_blend_tool_button_press (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp);
static void gimp_blend_tool_button_release (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp);
static void gimp_blend_tool_motion (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp);
static void gimp_blend_tool_cursor_update (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp);
static void gimp_blend_tool_draw (GimpDrawTool *draw_tool);
static BlendOptions * blend_options_new (void);
static void blend_options_reset (GimpToolOptions *tool_options);
static void gradient_type_callback (GtkWidget *widget,
gpointer data);
static void blend_options_drop_gradient (GtkWidget *widget,
GimpViewable *viewable,
gpointer data);
static void blend_options_drop_tool (GtkWidget *widget,
GimpViewable *viewable,
gpointer data);
static gdouble gradient_calc_conical_sym_factor (gdouble dist,
gdouble *axis,
gdouble offset,
gdouble x,
gdouble y);
static gdouble gradient_calc_conical_asym_factor (gdouble dist,
gdouble *axis,
gdouble offset,
gdouble x,
gdouble y);
static gdouble gradient_calc_square_factor (gdouble dist,
gdouble offset,
gdouble x,
gdouble y);
static gdouble gradient_calc_radial_factor (gdouble dist,
gdouble offset,
gdouble x,
gdouble y);
static gdouble gradient_calc_linear_factor (gdouble dist,
gdouble *vec,
gdouble offset,
gdouble x,
gdouble y);
static gdouble gradient_calc_bilinear_factor (gdouble dist,
gdouble *vec,
gdouble offset,
gdouble x,
gdouble y);
static gdouble gradient_calc_spiral_factor (gdouble dist,
gdouble *axis,
gdouble offset,
gdouble x,
gdouble y,
gint cwise);
static gdouble gradient_calc_shapeburst_angular_factor (gdouble x,
gdouble y);
static gdouble gradient_calc_shapeburst_spherical_factor (gdouble x,
gdouble y);
static gdouble gradient_calc_shapeburst_dimpled_factor (gdouble x,
gdouble y);
static gdouble gradient_repeat_none (gdouble val);
static gdouble gradient_repeat_sawtooth (gdouble val);
static gdouble gradient_repeat_triangular (gdouble val);
static void gradient_precalc_shapeburst (GimpImage *gimage,
GimpDrawable *drawable,
PixelRegion *PR,
gdouble dist);
static void gradient_render_pixel (gdouble x,
gdouble y,
GimpRGB *color,
gpointer render_data);
static void gradient_put_pixel (gint x,
gint y,
GimpRGB *color,
gpointer put_pixel_data);
static void gradient_fill_region (GimpImage *gimage,
GimpDrawable *drawable,
PixelRegion *PR,
gint width,
gint height,
BlendMode blend_mode,
GradientType gradient_type,
gdouble offset,
RepeatMode repeat,
gint supersample,
gint max_depth,
gdouble threshold,
gdouble sx,
gdouble sy,
gdouble ex,
gdouble ey,
GimpProgressFunc progress_callback,
gpointer progress_data);
static GimpDrawToolClass *parent_class = NULL;
static BlendOptions *blend_options = NULL;
/* variables for the shapeburst algs */
static PixelRegion distR =
{
NULL, /* data */
NULL, /* tiles */
0, /* rowstride */
0, 0, /* w, h */
0, 0, /* x, y */
4, /* bytes */
0 /* process count */
};
/* dnd stuff */
static GtkTargetEntry blend_target_table[] =
{
GIMP_TARGET_GRADIENT,
GIMP_TARGET_TOOL
};
static guint blend_n_targets = (sizeof (blend_target_table) /
sizeof (blend_target_table[0]));
void
gimp_blend_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_BLEND_TOOL,
TRUE,
"gimp:blend_tool",
_("Blend"),
_("Fill with a color gradient"),
N_("/Tools/Paint Tools/Blend"), "L",
NULL, "tools/blend.html",
GIMP_STOCK_TOOL_BLEND);
}
GtkType
gimp_blend_tool_get_type (void)
{
static GtkType tool_type = 0;
if (! tool_type)
{
GtkTypeInfo tool_info =
{
"GimpBlendTool",
sizeof (GimpBlendTool),
sizeof (GimpBlendToolClass),
(GtkClassInitFunc) gimp_blend_tool_class_init,
(GtkObjectInitFunc) gimp_blend_tool_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
tool_type = gtk_type_unique (GIMP_TYPE_DRAW_TOOL, &tool_info);
}
return tool_type;
}
static void
gimp_blend_tool_class_init (GimpBlendToolClass *klass)
{
GtkObjectClass *object_class;
GimpToolClass *tool_class;
GimpDrawToolClass *draw_tool_class;
object_class = (GtkObjectClass *) klass;
tool_class = (GimpToolClass *) klass;
draw_tool_class = (GimpDrawToolClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_DRAW_TOOL);
object_class->destroy = gimp_blend_tool_destroy;
tool_class->button_press = gimp_blend_tool_button_press;
tool_class->button_release = gimp_blend_tool_button_release;
tool_class->motion = gimp_blend_tool_motion;
tool_class->cursor_update = gimp_blend_tool_cursor_update;
draw_tool_class->draw = gimp_blend_tool_draw;
}
static void
gimp_blend_tool_init (GimpBlendTool *blend_tool)
{
GimpTool *tool;
tool = GIMP_TOOL (blend_tool);
if (! blend_options)
{
blend_options = blend_options_new ();
tool_manager_register_tool_options (GIMP_TYPE_BLEND_TOOL,
(GimpToolOptions *) blend_options);
}
tool->tool_cursor = GIMP_BLEND_TOOL_CURSOR;
tool->scroll_lock = TRUE; /* Disallow scrolling */
}
static void
gimp_blend_tool_destroy (GtkObject *object)
{
/* free the distance map data if it exists */
if (distR.tiles)
tile_manager_destroy (distR.tiles);
distR.tiles = NULL;
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gimp_blend_tool_button_press (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp)
{
GimpBlendTool *blend_tool;
blend_tool = GIMP_BLEND_TOOL (tool);
switch (gimp_drawable_type (gimp_image_active_drawable (gdisp->gimage)))
{
case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
g_message (_("Blend: Invalid for indexed images."));
return;
break;
default:
break;
}
/* Keep the coordinates of the target */
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y,
&blend_tool->startx, &blend_tool->starty,
FALSE, TRUE);
blend_tool->endx = blend_tool->startx;
blend_tool->endy = blend_tool->starty;
/* Make the tool active and set the gdisplay which owns it */
gdk_pointer_grab (gdisp->canvas->window, FALSE,
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
tool->gdisp = gdisp;
tool->state = ACTIVE;
/* initialize the statusbar display */
blend_tool->context_id =
gtk_statusbar_get_context_id (GTK_STATUSBAR (gdisp->statusbar), "blend");
gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar),
blend_tool->context_id, _("Blend: 0, 0"));
/* Start drawing the blend tool */
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool),
gdisp->canvas->window);
}
static void
gimp_blend_tool_button_release (GimpTool *tool,
GdkEventButton *bevent,
GDisplay *gdisp)
{
GimpImage *gimage;
GimpBlendTool *blend_tool;
#ifdef BLEND_UI_CALLS_VIA_PDB
Argument *return_vals;
gint nreturn_vals;
#else
GimpProgress *progress;
#endif
blend_tool = GIMP_BLEND_TOOL (tool);
gimage = gdisp->gimage;
gdk_pointer_ungrab (bevent->time);
gdk_flush ();
gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), blend_tool->context_id);
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
tool->state = INACTIVE;
/* if the 3rd button isn't pressed, fill the selected region */
if (! (bevent->state & GDK_BUTTON3_MASK) &&
((blend_tool->startx != blend_tool->endx) ||
(blend_tool->starty != blend_tool->endy)))
{
/* we can't do callbacks easily with the PDB, so this UI/backend
* separation (though good) is ignored for the moment */
#ifdef BLEND_UI_CALLS_VIA_PDB
return_vals =
procedural_db_run_proc ("gimp_blend",
&nreturn_vals,
PDB_DRAWABLE, drawable_ID (gimp_image_active_drawable (gimage)),
PDB_INT32, (gint32) blend_options->blend_mode,
PDB_INT32, (gint32) PAINT_OPTIONS_GET_PAINT_MODE (blend_options),
PDB_INT32, (gint32) blend_options->gradient_type,
PDB_FLOAT, (gdouble) PAINT_OPTIONS_GET_OPACITY (blend_options) * 100,
PDB_FLOAT, (gdouble) blend_options->offset,
PDB_INT32, (gint32) blend_options->repeat,
PDB_INT32, (gint32) blend_options->supersample,
PDB_INT32, (gint32) blend_options->max_depth,
PDB_FLOAT, (gdouble) blend_options->threshold,
PDB_FLOAT, (gdouble) blend_tool->startx,
PDB_FLOAT, (gdouble) blend_tool->starty,
PDB_FLOAT, (gdouble) blend_tool->endx,
PDB_FLOAT, (gdouble) blend_tool->endy,
PDB_END);
if (return_vals && return_vals[0].value.pdb_int == PDB_SUCCESS)
gdisplays_flush ();
else
g_message (_("Blend operation failed."));
procedural_db_destroy_args (return_vals, nreturn_vals);
#else /* ! BLEND_UI_CALLS_VIA_PDB */
progress = progress_start (gdisp, _("Blending..."), FALSE, NULL, NULL);
blend (gimage,
gimp_image_active_drawable (gimage),
blend_options->blend_mode,
gimp_context_get_paint_mode (gimp_get_current_context (gimage->gimp)),
blend_options->gradient_type,
gimp_context_get_opacity (gimp_get_current_context (gimage->gimp)) * 100,
blend_options->offset,
blend_options->repeat,
blend_options->supersample,
blend_options->max_depth,
blend_options->threshold,
blend_tool->startx,
blend_tool->starty,
blend_tool->endx,
blend_tool->endy,
progress ? progress_update_and_flush : (GimpProgressFunc) NULL,
progress);
if (progress)
progress_end (progress);
gdisplays_flush ();
#endif /* ! BLEND_UI_CALLS_VIA_PDB */
}
}
static void
gimp_blend_tool_motion (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp)
{
GimpBlendTool *blend_tool;
gchar vector[STATUSBAR_SIZE];
blend_tool = GIMP_BLEND_TOOL (tool);
/* undraw the current tool */
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
/* Get the current coordinates */
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y,
&blend_tool->endx, &blend_tool->endy, FALSE, 1);
/* Restrict to multiples of 15 degrees if ctrl is pressed */
if (mevent->state & GDK_CONTROL_MASK)
{
gint tangens2[6] = { 34, 106, 196, 334, 618, 1944 };
gint cosinus[7] = { 256, 247, 222, 181, 128, 66, 0 };
gint dx, dy, i, radius, frac;
dx = blend_tool->endx - blend_tool->startx;
dy = blend_tool->endy - blend_tool->starty;
if (dy)
{
radius = sqrt (SQR (dx) + SQR (dy));
frac = abs ((dx << 8) / dy);
for (i = 0; i < 6; i++)
{
if (frac < tangens2[i])
break;
}
dx = dx > 0 ? (cosinus[6-i] * radius) >> 8 : - ((cosinus[6-i] * radius) >> 8);
dy = dy > 0 ? (cosinus[i] * radius) >> 8 : - ((cosinus[i] * radius) >> 8);
}
blend_tool->endx = blend_tool->startx + dx;
blend_tool->endy = blend_tool->starty + dy;
}
gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), blend_tool->context_id);
if (gdisp->dot_for_dot)
{
g_snprintf (vector, sizeof (vector), gdisp->cursor_format_str,
_("Blend: "),
blend_tool->endx - blend_tool->startx,
", ",
blend_tool->endy - blend_tool->starty);
}
else /* show real world units */
{
gdouble unit_factor = gimp_unit_get_factor (gdisp->gimage->unit);
g_snprintf (vector, sizeof (vector), gdisp->cursor_format_str,
_("Blend: "),
blend_tool->endx - blend_tool->startx * unit_factor /
gdisp->gimage->xresolution,
", ",
blend_tool->endy - blend_tool->starty * unit_factor /
gdisp->gimage->yresolution);
}
gtk_statusbar_push (GTK_STATUSBAR (gdisp->statusbar), blend_tool->context_id,
vector);
/* redraw the current tool */
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static void
gimp_blend_tool_cursor_update (GimpTool *tool,
GdkEventMotion *mevent,
GDisplay *gdisp)
{
switch (gimp_drawable_type (gimp_image_active_drawable (gdisp->gimage)))
{
case INDEXED_GIMAGE:
case INDEXEDA_GIMAGE:
gdisplay_install_tool_cursor (gdisp,
GIMP_BAD_CURSOR,
GIMP_BLEND_TOOL_CURSOR,
GIMP_CURSOR_MODIFIER_NONE);
break;
default:
gdisplay_install_tool_cursor (gdisp,
GIMP_MOUSE_CURSOR,
GIMP_BLEND_TOOL_CURSOR,
GIMP_CURSOR_MODIFIER_NONE);
break;
}
}
static void
gimp_blend_tool_draw (GimpDrawTool *draw_tool)
{
GimpTool *tool;
GimpBlendTool *blend_tool;
gint tx1, ty1, tx2, ty2;
tool = GIMP_TOOL (draw_tool);
blend_tool = GIMP_BLEND_TOOL (draw_tool);
gdisplay_transform_coords (tool->gdisp,
blend_tool->startx, blend_tool->starty,
&tx1, &ty1, 1);
gdisplay_transform_coords (tool->gdisp,
blend_tool->endx, blend_tool->endy,
&tx2, &ty2, 1);
/* Draw start target */
gdk_draw_line (draw_tool->win,
draw_tool->gc,
tx1 - (TARGET_WIDTH >> 1), ty1,
tx1 + (TARGET_WIDTH >> 1), ty1);
gdk_draw_line (draw_tool->win,
draw_tool->gc,
tx1, ty1 - (TARGET_HEIGHT >> 1),
tx1, ty1 + (TARGET_HEIGHT >> 1));
/* Draw end target */
gdk_draw_line (draw_tool->win,
draw_tool->gc,
tx2 - (TARGET_WIDTH >> 1), ty2,
tx2 + (TARGET_WIDTH >> 1), ty2);
gdk_draw_line (draw_tool->win,
draw_tool->gc,
tx2, ty2 - (TARGET_HEIGHT >> 1),
tx2, ty2 + (TARGET_HEIGHT >> 1));
/* Draw the line between the start and end coords */
gdk_draw_line (draw_tool->win,
draw_tool->gc,
tx1, ty1, tx2, ty2);
}
static BlendOptions *
blend_options_new (void)
{
BlendOptions *options;
GtkWidget *vbox;
GtkWidget *table;
GtkWidget *scale;
GtkWidget *frame;
/* the new blend tool options structure */
options = g_new0 (BlendOptions, 1);
paint_options_init ((PaintOptions *) options,
GIMP_TYPE_BLEND_TOOL,
blend_options_reset);
options->offset = options->offset_d = 0.0;
options->blend_mode = options->blend_mode_d = FG_BG_RGB_MODE;
options->gradient_type = options->gradient_type_d = LINEAR;
options->repeat = options->repeat_d = REPEAT_NONE;
options->supersample = options->supersample_d = FALSE;
options->max_depth = options->max_depth_d = 3;
options->threshold = options->threshold_d = 0.2;
/* the main vbox */
vbox = ((GimpToolOptions *) options)->main_vbox;
/* dnd stuff */
gtk_drag_dest_set (vbox,
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
blend_target_table, blend_n_targets,
GDK_ACTION_COPY);
gimp_dnd_viewable_dest_set (vbox,
GIMP_TYPE_GRADIENT,
blend_options_drop_gradient,
options);
gimp_dnd_viewable_dest_set (vbox,
GIMP_TYPE_TOOL_INFO,
blend_options_drop_tool,
options);
/* the offset scale */
table = gtk_table_new (4, 2, FALSE);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 4);
gtk_table_set_row_spacings (GTK_TABLE (table), 1);
gtk_table_set_row_spacing (GTK_TABLE (table), 0, 2);
gtk_box_pack_start (GTK_BOX (vbox), table, TRUE, TRUE, 0);
options->offset_w =
gtk_adjustment_new (options->offset_d, 0.0, 100.0, 1.0, 1.0, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (options->offset_w));
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("Offset:"), 1.0, 1.0,
scale, 1, FALSE);
g_signal_connect (G_OBJECT (options->offset_w), "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&options->offset);
/* the blend mode menu */
options->blend_mode_w = gimp_option_menu_new2
(FALSE,
G_CALLBACK (gimp_menu_item_update),
&options->blend_mode,
GINT_TO_POINTER (options->blend_mode_d),
_("FG to BG (RGB)"), GINT_TO_POINTER (FG_BG_RGB_MODE), NULL,
_("FG to BG (HSV)"), GINT_TO_POINTER (FG_BG_HSV_MODE), NULL,
_("FG to Transparent"), GINT_TO_POINTER (FG_TRANS_MODE), NULL,
_("Custom Gradient"), GINT_TO_POINTER (CUSTOM_MODE), NULL,
NULL);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
_("Blend:"), 1.0, 0.5,
options->blend_mode_w, 1, TRUE);
/* the gradient type menu */
options->gradient_type_w = gimp_option_menu_new2
(FALSE,
G_CALLBACK (gradient_type_callback),
&options->gradient_type,
GINT_TO_POINTER (options->gradient_type_d),
_("Linear"), GINT_TO_POINTER (LINEAR), NULL,
_("Bi-Linear"), GINT_TO_POINTER (BILINEAR), NULL,
_("Radial"), GINT_TO_POINTER (RADIAL), NULL,
_("Square"), GINT_TO_POINTER (SQUARE), NULL,
_("Conical (symmetric)"), GINT_TO_POINTER (CONICAL_SYMMETRIC), NULL,
_("Conical (asymmetric)"), GINT_TO_POINTER (CONICAL_ASYMMETRIC), NULL,
_("Shapeburst (angular)"), GINT_TO_POINTER (SHAPEBURST_ANGULAR), NULL,
_("Shapeburst (spherical)"), GINT_TO_POINTER (SHAPEBURST_SPHERICAL), NULL,
_("Shapeburst (dimpled)"), GINT_TO_POINTER (SHAPEBURST_DIMPLED), NULL,
_("Spiral (clockwise)"), GINT_TO_POINTER (SPIRAL_CLOCKWISE), NULL,
_("Spiral (anticlockwise)"), GINT_TO_POINTER (SPIRAL_ANTICLOCKWISE), NULL,
NULL);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
_("Gradient:"), 1.0, 0.5,
options->gradient_type_w, 1, TRUE);
/* the repeat option */
options->repeat_w = gimp_option_menu_new2
(FALSE,
G_CALLBACK (gimp_menu_item_update),
&options->repeat,
GINT_TO_POINTER (options->repeat_d),
_("None"), GINT_TO_POINTER (REPEAT_NONE), NULL,
_("Sawtooth Wave"), GINT_TO_POINTER (REPEAT_SAWTOOTH), NULL,
_("Triangular Wave"), GINT_TO_POINTER (REPEAT_TRIANGULAR), NULL,
NULL);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 3,
_("Repeat:"), 1.0, 0.5,
options->repeat_w, 1, TRUE);
/* show the table */
gtk_widget_show (table);
/* frame for supersampling options */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
/* vbox for the supersampling stuff */
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
/* supersampling toggle */
options->supersample_w =
gtk_check_button_new_with_label (_("Adaptive Supersampling"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->supersample_w),
options->supersample_d);
gtk_box_pack_start (GTK_BOX (vbox), options->supersample_w, FALSE, FALSE, 0);
gtk_widget_show (options->supersample_w);
g_signal_connect (G_OBJECT (options->supersample_w), "toggled",
G_CALLBACK (gimp_toggle_button_update),
&options->supersample);
/* table for supersampling options */
table = gtk_table_new (2, 2, FALSE);
gtk_container_set_border_width (GTK_CONTAINER (table), 2);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 4);
gtk_table_set_row_spacings (GTK_TABLE (table), 1);
gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
/* automatically set the sensitive state of the table */
gtk_widget_set_sensitive (table, options->supersample_d);
g_object_set_data (G_OBJECT (options->supersample_w), "set_sensitive",
table);
/* max depth scale */
options->max_depth_w =
gtk_adjustment_new (options->max_depth_d, 1.0, 10.0, 1.0, 1.0, 1.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (options->max_depth_w));
gtk_scale_set_digits (GTK_SCALE (scale), 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("Max Depth:"), 1.0, 1.0,
scale, 1, FALSE);
g_signal_connect (G_OBJECT(options->max_depth_w), "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&options->max_depth);
/* threshold scale */
options->threshold_w =
gtk_adjustment_new (options->threshold_d, 0.0, 4.0, 0.01, 0.01, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (options->threshold_w));
gtk_scale_set_digits (GTK_SCALE (scale), 2);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
_("Threshold:"), 1.0, 1.0,
scale, 1, FALSE);
g_signal_connect (G_OBJECT(options->threshold_w), "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&options->threshold);
/* show the table */
gtk_widget_show (table);
return options;
}
static void
blend_options_reset (GimpToolOptions *tool_options)
{
BlendOptions *options;
options = (BlendOptions *) tool_options;
paint_options_reset (tool_options);
options->blend_mode = options->blend_mode_d;
options->gradient_type = options->gradient_type_d;
options->repeat = options->repeat_d;
gtk_option_menu_set_history (GTK_OPTION_MENU (options->blend_mode_w),
options->blend_mode_d);
gtk_option_menu_set_history (GTK_OPTION_MENU (options->gradient_type_w),
options->gradient_type_d);
gtk_option_menu_set_history (GTK_OPTION_MENU (options->repeat_w),
options->repeat_d);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->offset_w),
options->offset_d);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->supersample_w),
options->supersample_d);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->max_depth_w),
options->max_depth_d);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->threshold_w),
options->threshold_d);
}
static void
gradient_type_callback (GtkWidget *widget,
gpointer data)
{
gimp_menu_item_update (widget, data);
gtk_widget_set_sensitive (blend_options->repeat_w,
(blend_options->gradient_type < 6));
}
static void
blend_options_drop_gradient (GtkWidget *widget,
GimpViewable *viewable,
gpointer data)
{
BlendOptions *options;
options = (BlendOptions *) data;
gimp_context_set_gradient (gimp_get_user_context (the_gimp),
GIMP_GRADIENT (viewable));
gtk_option_menu_set_history (GTK_OPTION_MENU (options->blend_mode_w),
CUSTOM_MODE);
options->blend_mode = CUSTOM_MODE;
}
static void
blend_options_drop_tool (GtkWidget *widget,
GimpViewable *viewable,
gpointer data)
{
gimp_context_set_tool (gimp_get_user_context (the_gimp),
GIMP_TOOL_INFO (viewable));
}
/* The actual blending procedure */
void
blend (GimpImage *gimage,
GimpDrawable *drawable,
BlendMode blend_mode,
int paint_mode,
GradientType gradient_type,
double opacity,
double offset,
RepeatMode repeat,
int supersample,
int max_depth,
double threshold,
double startx,
double starty,
double endx,
double endy,
GimpProgressFunc progress_callback,
gpointer progress_data)
{
TileManager *buf_tiles;
PixelRegion bufPR;
gint has_alpha;
gint has_selection;
gint bytes;
gint x1, y1, x2, y2;
gimp_set_busy (gimage->gimp);
has_selection = gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
has_alpha = gimp_drawable_has_alpha (drawable);
bytes = gimp_drawable_bytes (drawable);
/* Always create an alpha temp buf (for generality) */
if (! has_alpha)
{
has_alpha = TRUE;
bytes += 1;
}
buf_tiles = tile_manager_new ((x2 - x1), (y2 - y1), bytes);
pixel_region_init (&bufPR, buf_tiles, 0, 0, (x2 - x1), (y2 - y1), TRUE);
gradient_fill_region (gimage, drawable,
&bufPR, (x2 - x1), (y2 - y1),
blend_mode, gradient_type, offset, repeat,
supersample, max_depth, threshold,
(startx - x1), (starty - y1),
(endx - x1), (endy - y1),
progress_callback, progress_data);
pixel_region_init (&bufPR, buf_tiles, 0, 0, (x2 - x1), (y2 - y1), FALSE);
gimp_image_apply_image (gimage, drawable, &bufPR, TRUE,
(opacity * 255) / 100, paint_mode, NULL, x1, y1);
/* update the image */
gimp_drawable_update (drawable, x1, y1, (x2 - x1), (y2 - y1));
/* free the temporary buffer */
tile_manager_destroy (buf_tiles);
gimp_unset_busy (gimage->gimp);
}
static gdouble
gradient_calc_conical_sym_factor (gdouble dist,
gdouble *axis,
gdouble offset,
gdouble x,
gdouble y)
{
gdouble vec[2];
gdouble r;
gdouble rat;
if (dist == 0.0)
{
rat = 0.0;
}
else if ((x != 0) || (y != 0))
{
/* Calculate offset from the start in pixels */
r = sqrt (x * x + y * y);
vec[0] = x / r;
vec[1] = y / r;
rat = axis[0] * vec[0] + axis[1] * vec[1]; /* Dot product */
if (rat > 1.0)
rat = 1.0;
else if (rat < -1.0)
rat = -1.0;
/* This cool idea is courtesy Josh MacDonald,
* Ali Rahimi --- two more XCF losers. */
rat = acos (rat) / G_PI;
rat = pow (rat, (offset / 10) + 1);
rat = CLAMP (rat, 0.0, 1.0);
}
else
{
rat = 0.5;
}
return rat;
}
static gdouble
gradient_calc_conical_asym_factor (gdouble dist,
gdouble *axis,
gdouble offset,
gdouble x,
gdouble y)
{
gdouble ang0, ang1;
gdouble ang;
gdouble rat;
if (dist == 0.0)
{
rat = 0.0;
}
else
{
if ((x != 0) || (y != 0))
{
ang0 = atan2(axis[0], axis[1]) + G_PI;
ang1 = atan2(x, y) + G_PI;
ang = ang1 - ang0;
if (ang < 0.0)
ang += (2.0 * G_PI);
rat = ang / (2.0 * G_PI);
rat = pow(rat, (offset / 10) + 1);
rat = CLAMP(rat, 0.0, 1.0);
}
else
{
rat = 0.5; /* We are on middle point */
}
}
return rat;
}
static gdouble
gradient_calc_square_factor (gdouble dist,
gdouble offset,
gdouble x,
gdouble y)
{
gdouble r;
gdouble rat;
if (dist == 0.0)
{
rat = 0.0;
}
else
{
/* Calculate offset from start as a value in [0, 1] */
offset = offset / 100.0;
r = MAX (abs (x), abs (y));
rat = r / dist;
if (rat < offset)
rat = 0.0;
else if (offset == 1)
rat = (rat>=1) ? 1 : 0;
else
rat = (rat - offset) / (1.0 - offset);
}
return rat;
}
static gdouble
gradient_calc_radial_factor (gdouble dist,
gdouble offset,
gdouble x,
gdouble y)
{
gdouble r;
gdouble rat;
if (dist == 0.0)
{
rat = 0.0;
}
else
{
/* Calculate radial offset from start as a value in [0, 1] */
offset = offset / 100.0;
r = sqrt(SQR(x) + SQR(y));
rat = r / dist;
if (rat < offset)
rat = 0.0;
else if (offset == 1)
rat = (rat>=1) ? 1 : 0;
else
rat = (rat - offset) / (1.0 - offset);
}
return rat;
}
static gdouble
gradient_calc_linear_factor (gdouble dist,
gdouble *vec,
gdouble offset,
gdouble x,
gdouble y)
{
double r;
double rat;
if (dist == 0.0)
{
rat = 0.0;
}
else
{
offset = offset / 100.0;
r = vec[0] * x + vec[1] * y;
rat = r / dist;
if (rat < offset)
rat = 0.0;
else if (offset == 1)
rat = (rat>=1) ? 1 : 0;
else
rat = (rat - offset) / (1.0 - offset);
}
return rat;
}
static gdouble
gradient_calc_bilinear_factor (gdouble dist,
gdouble *vec,
gdouble offset,
gdouble x,
gdouble y)
{
gdouble r;
gdouble rat;
if (dist == 0.0)
{
rat = 0.0;
}
else
{
/* Calculate linear offset from the start line outward */
offset = offset / 100.0;
r = vec[0] * x + vec[1] * y;
rat = r / dist;
if (fabs(rat) < offset)
rat = 0.0;
else if (offset == 1)
rat = (rat>=1) ? 1 : 0;
else
rat = (fabs(rat) - offset) / (1.0 - offset);
}
return rat;
}
static gdouble
gradient_calc_spiral_factor (gdouble dist,
gdouble *axis,
gdouble offset,
gdouble x,
gdouble y,
gint cwise)
{
gdouble ang0, ang1;
gdouble ang, r;
gdouble rat;
if (dist == 0.0)
{
rat = 0.0;
}
else
{
if (x != 0.0 || y != 0.0)
{
ang0 = atan2 (axis[0], axis[1]) + G_PI;
ang1 = atan2 (x, y) + G_PI;
if(!cwise)
ang = ang0 - ang1;
else
ang = ang1 - ang0;
if (ang < 0.0)
ang += (2.0 * G_PI);
r = sqrt (x * x + y * y) / dist;
rat = ang / (2.0 * G_PI) + r + offset;
rat = fmod (rat, 1.0);
}
else
rat = 0.5 ; /* We are on the middle point */
}
return rat;
}
static gdouble
gradient_calc_shapeburst_angular_factor (gdouble x,
gdouble y)
{
gint ix, iy;
Tile *tile;
gfloat value;
ix = (int) CLAMP (x, 0, distR.w);
iy = (int) CLAMP (y, 0, distR.h);
tile = tile_manager_get_tile (distR.tiles, ix, iy, TRUE, FALSE);
value = 1.0 - *((float *) tile_data_pointer (tile, ix % TILE_WIDTH, iy % TILE_HEIGHT));
tile_release (tile, FALSE);
return value;
}
static gdouble
gradient_calc_shapeburst_spherical_factor (gdouble x,
gdouble y)
{
gint ix, iy;
Tile *tile;
gfloat value;
ix = (int) CLAMP (x, 0, distR.w);
iy = (int) CLAMP (y, 0, distR.h);
tile = tile_manager_get_tile (distR.tiles, ix, iy, TRUE, FALSE);
value = *((gfloat *) tile_data_pointer (tile, ix % TILE_WIDTH, iy % TILE_HEIGHT));
value = 1.0 - sin (0.5 * G_PI * value);
tile_release (tile, FALSE);
return value;
}
static gdouble
gradient_calc_shapeburst_dimpled_factor (gdouble x,
gdouble y)
{
gint ix, iy;
Tile *tile;
gfloat value;
ix = (int) CLAMP (x, 0, distR.w);
iy = (int) CLAMP (y, 0, distR.h);
tile = tile_manager_get_tile (distR.tiles, ix, iy, TRUE, FALSE);
value = *((float *) tile_data_pointer (tile, ix % TILE_WIDTH, iy % TILE_HEIGHT));
value = cos (0.5 * G_PI * value);
tile_release (tile, FALSE);
return value;
}
static gdouble
gradient_repeat_none (gdouble val)
{
return CLAMP (val, 0.0, 1.0);
}
static gdouble
gradient_repeat_sawtooth (gdouble val)
{
if (val >= 0.0)
return fmod (val, 1.0);
else
return 1.0 - fmod (-val, 1.0);
}
static gdouble
gradient_repeat_triangular (gdouble val)
{
gint ival;
if (val < 0.0)
val = -val;
ival = (int) val;
if (ival & 1)
return 1.0 - fmod (val, 1.0);
else
return fmod (val, 1.0);
}
/*****/
static void
gradient_precalc_shapeburst (GimpImage *gimage,
GimpDrawable *drawable,
PixelRegion *PR,
gdouble dist)
{
GimpChannel *mask;
PixelRegion tempR;
gfloat max_iteration;
gfloat *distp;
gint size;
gpointer pr;
guchar white[1] = { OPAQUE_OPACITY };
/* allocate the distance map */
if (distR.tiles)
tile_manager_destroy (distR.tiles);
distR.tiles = tile_manager_new (PR->w, PR->h, sizeof (gfloat));
/* allocate the selection mask copy */
tempR.tiles = tile_manager_new (PR->w, PR->h, 1);
pixel_region_init (&tempR, tempR.tiles, 0, 0, PR->w, PR->h, TRUE);
/* If the gimage mask is not empty, use it as the shape burst source */
if (! gimage_mask_is_empty (gimage))
{
PixelRegion maskR;
gint x1, y1, x2, y2;
gint offx, offy;
gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
gimp_drawable_offsets (drawable, &offx, &offy);
/* the selection mask */
mask = gimp_image_get_mask (gimage);
pixel_region_init (&maskR, gimp_drawable_data (GIMP_DRAWABLE (mask)),
x1 + offx, y1 + offy, (x2 - x1), (y2 - y1), FALSE);
/* copy the mask to the temp mask */
copy_region (&maskR, &tempR);
}
/* otherwise... */
else
{
/* If the intended drawable has an alpha channel, use that */
if (gimp_drawable_has_alpha (drawable))
{
PixelRegion drawableR;
pixel_region_init (&drawableR, gimp_drawable_data (drawable),
PR->x, PR->y, PR->w, PR->h, FALSE);
extract_alpha_region (&drawableR, NULL, &tempR);
}
else
{
/* Otherwise, just fill the shapeburst to white */
color_region (&tempR, white);
}
}
pixel_region_init (&tempR, tempR.tiles, 0, 0, PR->w, PR->h, TRUE);
pixel_region_init (&distR, distR.tiles, 0, 0, PR->w, PR->h, TRUE);
max_iteration = shapeburst_region (&tempR, &distR);
/* normalize the shapeburst with the max iteration */
if (max_iteration > 0)
{
pixel_region_init (&distR, distR.tiles, 0, 0, PR->w, PR->h, TRUE);
for (pr = pixel_regions_register (1, &distR);
pr != NULL;
pr = pixel_regions_process (pr))
{
distp = (gfloat *) distR.data;
size = distR.w * distR.h;
while (size--)
*distp++ /= max_iteration;
}
pixel_region_init (&distR, distR.tiles, 0, 0, PR->w, PR->h, FALSE);
}
tile_manager_destroy (tempR.tiles);
}
static void
gradient_render_pixel (double x,
double y,
GimpRGB *color,
gpointer render_data)
{
RenderBlendData *rbd;
gdouble factor;
rbd = render_data;
/* Calculate blending factor */
switch (rbd->gradient_type)
{
case RADIAL:
factor = gradient_calc_radial_factor (rbd->dist, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case CONICAL_SYMMETRIC:
factor = gradient_calc_conical_sym_factor (rbd->dist, rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case CONICAL_ASYMMETRIC:
factor = gradient_calc_conical_asym_factor (rbd->dist, rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case SQUARE:
factor = gradient_calc_square_factor (rbd->dist, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case LINEAR:
factor = gradient_calc_linear_factor (rbd->dist, rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case BILINEAR:
factor = gradient_calc_bilinear_factor (rbd->dist, rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy);
break;
case SHAPEBURST_ANGULAR:
factor = gradient_calc_shapeburst_angular_factor (x, y);
break;
case SHAPEBURST_SPHERICAL:
factor = gradient_calc_shapeburst_spherical_factor (x, y);
break;
case SHAPEBURST_DIMPLED:
factor = gradient_calc_shapeburst_dimpled_factor (x, y);
break;
case SPIRAL_CLOCKWISE:
factor = gradient_calc_spiral_factor (rbd->dist, rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy,TRUE);
break;
case SPIRAL_ANTICLOCKWISE:
factor = gradient_calc_spiral_factor (rbd->dist, rbd->vec, rbd->offset,
x - rbd->sx, y - rbd->sy,FALSE);
break;
default:
gimp_fatal_error ("gradient_render_pixel(): Unknown gradient type %d",
(int) rbd->gradient_type);
return;
}
/* Adjust for repeat */
factor = (*rbd->repeat_func)(factor);
/* Blend the colors */
if (rbd->blend_mode == CUSTOM_MODE)
{
gimp_gradient_get_color_at (rbd->gradient, factor, color);
}
else
{
/* Blend values */
color->r = rbd->fg.r + (rbd->bg.r - rbd->fg.r) * factor;
color->g = rbd->fg.g + (rbd->bg.g - rbd->fg.g) * factor;
color->b = rbd->fg.b + (rbd->bg.b - rbd->fg.b) * factor;
color->a = rbd->fg.a + (rbd->bg.a - rbd->fg.a) * factor;
if (rbd->blend_mode == FG_BG_HSV_MODE)
gimp_hsv_to_rgb_double (&color->r, &color->g, &color->b);
}
}
static void
gradient_put_pixel (int x,
int y,
GimpRGB *color,
void *put_pixel_data)
{
PutPixelData *ppd;
guchar *data;
ppd = put_pixel_data;
/* Paint */
data = ppd->row_data + ppd->bytes * x;
if (ppd->bytes >= 3)
{
*data++ = color->r * 255.0;
*data++ = color->g * 255.0;
*data++ = color->b * 255.0;
*data++ = color->a * 255.0;
}
else
{
/* Convert to grayscale */
*data++ = 255.0 * INTENSITY (color->r, color->g, color->b);
*data++ = color->a * 255.0;
}
/* Paint whole row if we are on the rightmost pixel */
if (x == (ppd->width - 1))
pixel_region_set_row(ppd->PR, 0, y, ppd->width, ppd->row_data);
}
static void
gradient_fill_region (GimpImage *gimage,
GimpDrawable *drawable,
PixelRegion *PR,
gint width,
gint height,
BlendMode blend_mode,
GradientType gradient_type,
gdouble offset,
RepeatMode repeat,
gint supersample,
gint max_depth,
gdouble threshold,
gdouble sx,
gdouble sy,
gdouble ex,
gdouble ey,
GimpProgressFunc progress_callback,
gpointer progress_data)
{
RenderBlendData rbd;
PutPixelData ppd;
gint x, y;
gint endx, endy;
gpointer *pr;
guchar *data;
GimpRGB color;
GimpContext *context;
context = gimp_get_current_context (gimage->gimp);
rbd.gradient = gimp_context_get_gradient (context);
/* Get foreground and background colors, normalized */
gimp_context_get_foreground (context, &rbd.fg);
/* rbd.fg.a = 1.0; */ /* Foreground is always opaque */
gimp_context_get_background (context, &rbd.bg);
/* rbd.bg.a = 1.0; */ /* opaque, for now */
switch (blend_mode)
{
case FG_BG_RGB_MODE:
break;
case FG_BG_HSV_MODE:
/* Convert to HSV */
gimp_rgb_to_hsv_double (&rbd.fg.r, &rbd.fg.g, &rbd.fg.b);
gimp_rgb_to_hsv_double (&rbd.bg.r, &rbd.bg.g, &rbd.bg.b);
break;
case FG_TRANS_MODE:
/* Color does not change, just the opacity */
rbd.bg = rbd.fg;
rbd.bg.a = 0.0; /* transparent */
break;
case CUSTOM_MODE:
break;
default:
gimp_fatal_error ("gradient_fill_region(): Unknown blend mode %d",
(gint) blend_mode);
break;
}
/* Calculate type-specific parameters */
switch (gradient_type)
{
case RADIAL:
rbd.dist = sqrt(SQR(ex - sx) + SQR(ey - sy));
break;
case SQUARE:
rbd.dist = MAX (fabs (ex - sx), fabs (ey - sy));
break;
case CONICAL_SYMMETRIC:
case CONICAL_ASYMMETRIC:
case SPIRAL_CLOCKWISE:
case SPIRAL_ANTICLOCKWISE:
case LINEAR:
case BILINEAR:
rbd.dist = sqrt (SQR (ex - sx) + SQR (ey - sy));
if (rbd.dist > 0.0)
{
rbd.vec[0] = (ex - sx) / rbd.dist;
rbd.vec[1] = (ey - sy) / rbd.dist;
}
break;
case SHAPEBURST_ANGULAR:
case SHAPEBURST_SPHERICAL:
case SHAPEBURST_DIMPLED:
rbd.dist = sqrt (SQR (ex - sx) + SQR (ey - sy));
gradient_precalc_shapeburst (gimage, drawable, PR, rbd.dist);
break;
default:
gimp_fatal_error ("gradient_fill_region(): Unknown gradient type %d",
(gint) gradient_type);
break;
}
/* Set repeat function */
switch (repeat)
{
case REPEAT_NONE:
rbd.repeat_func = gradient_repeat_none;
break;
case REPEAT_SAWTOOTH:
rbd.repeat_func = gradient_repeat_sawtooth;
break;
case REPEAT_TRIANGULAR:
rbd.repeat_func = gradient_repeat_triangular;
break;
default:
gimp_fatal_error ("gradient_fill_region(): Unknown repeat mode %d",
(gint) repeat);
break;
}
/* Initialize render data */
rbd.offset = offset;
rbd.sx = sx;
rbd.sy = sy;
rbd.blend_mode = blend_mode;
rbd.gradient_type = gradient_type;
/* Render the gradient! */
if (supersample)
{
/* Initialize put pixel data */
ppd.PR = PR;
ppd.row_data = g_malloc (width * PR->bytes);
ppd.bytes = PR->bytes;
ppd.width = width;
/* Render! */
gimp_adaptive_supersample_area (0, 0, (width - 1), (height - 1),
max_depth, threshold,
gradient_render_pixel, &rbd,
gradient_put_pixel, &ppd,
progress_callback, progress_data);
/* Clean up */
g_free (ppd.row_data);
}
else
{
gint max_progress = PR->w * PR->h;
gint progress = 0;
for (pr = pixel_regions_register(1, PR);
pr != NULL;
pr = pixel_regions_process(pr))
{
data = PR->data;
endx = PR->x + PR->w;
endy = PR->y + PR->h;
for (y = PR->y; y < endy; y++)
for (x = PR->x; x < endx; x++)
{
gradient_render_pixel(x, y, &color, &rbd);
if (PR->bytes >= 3)
{
*data++ = color.r * 255.0;
*data++ = color.g * 255.0;
*data++ = color.b * 255.0;
*data++ = color.a * 255.0;
}
else
{
/* Convert to grayscale */
*data++ = 255.0 * INTENSITY (color.r, color.g, color.b);
*data++ = color.a * 255.0;
}
}
progress += PR->w * PR->h;
if (progress_callback)
(* progress_callback) (0, max_progress, progress, progress_data);
}
}
}
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