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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 "apptypes.h"
-
- #include "appenv.h"
- #include "asupsample.h"
- #include "blend.h"
- #include "cursorutil.h"
- #include "draw_core.h"
- #include "drawable.h"
- #include "errors.h"
- #include "fuzzy_select.h"
- #include "gdisplay.h"
- #include "gimage_mask.h"
- #include "gimpdnd.h"
- #include "gimpui.h"
- #include "gradient.h"
- #include "paint_options.h"
- #include "selection.h"
- #include "tools.h"
- #include "undo.h"
-
- #include "tile.h"
-
- #include "libgimp/gimpcolorspace.h"
- #include "libgimp/gimpmath.h"
-
- #include "libgimp/gimpintl.h"
-
-
- /* target size */
- #define TARGET_HEIGHT 15
- #define TARGET_WIDTH 15
-
- #define STATUSBAR_SIZE 128
-
- /* the blend structures */
-
- typedef gdouble (* RepeatFunc) (gdouble);
-
- typedef struct _BlendTool BlendTool;
-
- struct _BlendTool
- {
- DrawCore *core; /* Core select object */
-
- gint startx; /* starting x coord */
- gint starty; /* starting y coord */
-
- gint endx; /* ending x coord */
- gint endy; /* ending y coord */
- guint context_id; /* for the statusbar */
- };
-
- 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
- {
- gdouble offset;
- gdouble sx, sy;
- BlendMode blend_mode;
- GradientType gradient_type;
- color_t fg, bg;
- gdouble dist;
- gdouble vec[2];
- RepeatFunc repeat_func;
- } RenderBlendData;
-
- typedef struct
- {
- PixelRegion *PR;
- guchar *row_data;
- gint bytes;
- gint width;
- } PutPixelData;
-
-
- /* the blend tool options */
- 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]));
-
- /* local function prototypes */
-
- static void gradient_type_callback (GtkWidget *, gpointer);
-
- static void blend_button_press (Tool *, GdkEventButton *, gpointer);
- static void blend_button_release (Tool *, GdkEventButton *, gpointer);
- static void blend_motion (Tool *, GdkEventMotion *, gpointer);
- static void blend_cursor_update (Tool *, GdkEventMotion *, gpointer);
- static void blend_control (Tool *, ToolAction, gpointer);
-
- static void blend_options_drop_gradient (GtkWidget *, gradient_t *, gpointer);
- static void blend_options_drop_tool (GtkWidget *, ToolType, gpointer);
-
- static double gradient_calc_conical_sym_factor (double dist, double *axis, double offset,
- double x, double y);
- static double gradient_calc_conical_asym_factor (double dist, double *axis, double offset,
- double x, double y);
- static double gradient_calc_square_factor (double dist, double offset,
- double x, double y);
- static double gradient_calc_radial_factor (double dist, double offset,
- double x, double y);
- static double gradient_calc_linear_factor (double dist, double *vec, double offset,
- double x, double y);
- static double gradient_calc_bilinear_factor (double dist, double *vec, double offset,
- double x, double y);
- static double gradient_calc_spiral_factor (double dist, double *axis, double offset,
- double x, double y, gint cwise);
- static double gradient_calc_shapeburst_angular_factor (double x, double y);
- static double gradient_calc_shapeburst_spherical_factor (double x, double y);
- static double gradient_calc_shapeburst_dimpled_factor (double x, double y);
-
- static double gradient_repeat_none (double val);
- static double gradient_repeat_sawtooth (double val);
- static double gradient_repeat_triangular (double val);
-
- static void gradient_precalc_shapeburst (GImage *gimage, GimpDrawable *drawable,
- PixelRegion *PR, double dist);
-
- static void gradient_render_pixel (double x, double y,
- color_t *color, void *render_data);
- static void gradient_put_pixel (int x, int y,
- color_t color, void *put_pixel_data);
-
- static void gradient_fill_region (GImage *gimage, GimpDrawable *drawable, PixelRegion *PR,
- int width, int height,
- BlendMode blend_mode, GradientType gradient_type,
- double offset, RepeatMode repeat,
- int supersample, int max_depth, double threshold,
- double sx, double sy, double ex, double ey,
- progress_func_t progress_callback,
- void *progress_data);
-
-
- /* functions */
-
- 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_reset (void)
- {
- BlendOptions *options = blend_options;
-
- paint_options_reset ((PaintOptions *) 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 (blend_options->blend_mode_w),
- blend_options->blend_mode_d);
- gtk_option_menu_set_history (GTK_OPTION_MENU (options->gradient_type_w),
- blend_options->gradient_type_d);
- gtk_option_menu_set_history (GTK_OPTION_MENU (blend_options->repeat_w),
- blend_options->repeat_d);
-
- gtk_adjustment_set_value (GTK_ADJUSTMENT (blend_options->offset_w),
- blend_options->offset_d);
- gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (blend_options->supersample_w),
- blend_options->supersample_d);
- gtk_adjustment_set_value (GTK_ADJUSTMENT (blend_options->max_depth_w),
- blend_options->max_depth_d);
- gtk_adjustment_set_value (GTK_ADJUSTMENT (blend_options->threshold_w),
- blend_options->threshold_d);
- }
-
- static BlendOptions *
- blend_options_new (void)
- {
- BlendOptions *options;
-
- GtkWidget *vbox;
- GtkWidget *table;
- GtkWidget *scale;
- GtkWidget *frame;
-
- /* the new blend tool options structure */
- options = g_new (BlendOptions, 1);
- paint_options_init ((PaintOptions *) options,
- BLEND,
- 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 = ((ToolOptions *) 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_gradient_dest_set (vbox, blend_options_drop_gradient, NULL);
- gimp_dnd_tool_dest_set (vbox, blend_options_drop_tool, NULL);
-
- /* 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);
- gtk_signal_connect (GTK_OBJECT (options->offset_w), "value_changed",
- GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
- &options->offset);
-
- /* the blend mode menu */
- options->blend_mode_w = gimp_option_menu_new2
- (FALSE, gimp_menu_item_update,
- &options->blend_mode, (gpointer) options->blend_mode_d,
-
- _("FG to BG (RGB)"), (gpointer) FG_BG_RGB_MODE, NULL,
- _("FG to BG (HSV)"), (gpointer) FG_BG_HSV_MODE, NULL,
- _("FG to Transparent"), (gpointer) FG_TRANS_MODE, NULL,
- _("Custom Gradient"), (gpointer) 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, gradient_type_callback,
- &options->gradient_type, (gpointer) options->gradient_type_d,
-
- _("Linear"), (gpointer) LINEAR, NULL,
- _("Bi-Linear"), (gpointer) BILINEAR, NULL,
- _("Radial"), (gpointer) RADIAL, NULL,
- _("Square"), (gpointer) SQUARE, NULL,
- _("Conical (symmetric)"), (gpointer) CONICAL_SYMMETRIC, NULL,
- _("Conical (asymmetric)"), (gpointer) CONICAL_ASYMMETRIC, NULL,
- _("Shapeburst (angular)"), (gpointer) SHAPEBURST_ANGULAR, NULL,
- _("Shapeburst (spherical)"), (gpointer) SHAPEBURST_SPHERICAL, NULL,
- _("Shapeburst (dimpled)"), (gpointer) SHAPEBURST_DIMPLED, NULL,
- _("Spiral (clockwise)"), (gpointer) SPIRAL_CLOCKWISE, NULL,
- _("Spiral (anticlockwise)"), (gpointer) 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, gimp_menu_item_update,
- &options->repeat, (gpointer) options->repeat_d,
-
- _("None"), (gpointer) REPEAT_NONE, NULL,
- _("Sawtooth Wave"), (gpointer) REPEAT_SAWTOOTH, NULL,
- _("Triangular Wave"), (gpointer) 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_signal_connect (GTK_OBJECT (options->supersample_w), "toggled",
- GTK_SIGNAL_FUNC (gimp_toggle_button_update),
- &options->supersample);
- gtk_box_pack_start (GTK_BOX (vbox), options->supersample_w, FALSE, FALSE, 0);
- gtk_widget_show (options->supersample_w);
-
- /* 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);
- gtk_object_set_data (GTK_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);
- gtk_signal_connect (GTK_OBJECT(options->max_depth_w), "value_changed",
- GTK_SIGNAL_FUNC (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);
- gtk_signal_connect (GTK_OBJECT(options->threshold_w), "value_changed",
- GTK_SIGNAL_FUNC (gimp_double_adjustment_update),
- &options->threshold);
-
- /* show the table */
- gtk_widget_show (table);
-
- return options;
- }
-
-
- static void
- blend_button_press (Tool *tool,
- GdkEventButton *bevent,
- gpointer gdisp_ptr)
- {
- GDisplay * gdisp;
- BlendTool * blend_tool;
-
- gdisp = (GDisplay *) gdisp_ptr;
- blend_tool = (BlendTool *) tool->private;
-
- switch (drawable_type (gimage_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, 1);
-
- 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_ptr = gdisp_ptr;
- 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 */
- draw_core_start (blend_tool->core, gdisp->canvas->window, tool);
- }
-
- static void
- blend_button_release (Tool *tool,
- GdkEventButton *bevent,
- gpointer gdisp_ptr)
- {
- GDisplay * gdisp;
- GImage * gimage;
- BlendTool * blend_tool;
- #ifdef BLEND_UI_CALLS_VIA_PDB
- Argument *return_vals;
- int nreturn_vals;
- #else
- gimp_progress *progress;
- #endif
-
- gdisp = (GDisplay *) gdisp_ptr;
- gimage = gdisp->gimage;
- blend_tool = (BlendTool *) tool->private;
-
- gdk_pointer_ungrab (bevent->time);
- gdk_flush ();
-
- gtk_statusbar_pop (GTK_STATUSBAR (gdisp->statusbar), blend_tool->context_id);
-
- draw_core_stop (blend_tool->core, 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 (gimage_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,
- gimage_active_drawable (gimage),
- blend_options->blend_mode,
- gimp_context_get_paint_mode (NULL),
- blend_options->gradient_type,
- gimp_context_get_opacity (NULL) * 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 : (progress_func_t)NULL,
- progress);
-
- if (progress)
- progress_end (progress);
-
- gdisplays_flush ();
- #endif /* ! BLEND_UI_CALLS_VIA_PDB */
- }
- }
-
- static void
- blend_motion (Tool *tool,
- GdkEventMotion *mevent,
- gpointer gdisp_ptr)
- {
- GDisplay * gdisp;
- BlendTool * blend_tool;
- gchar vector[STATUSBAR_SIZE];
-
- gdisp = (GDisplay *) gdisp_ptr;
- blend_tool = (BlendTool *) tool->private;
-
- /* undraw the current tool */
- draw_core_pause (blend_tool->core, 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)
- {
- int tangens2[6] = { 34, 106, 196, 334, 618, 1944 };
- int cosinus[7] = { 256, 247, 222, 181, 128, 66, 0 };
- int 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 */
- draw_core_resume (blend_tool->core, tool);
- }
-
- static void
- blend_cursor_update (Tool *tool,
- GdkEventMotion *mevent,
- gpointer gdisp_ptr)
- {
- GDisplay * gdisp;
-
- gdisp = (GDisplay *) gdisp_ptr;
-
- switch (drawable_type (gimage_active_drawable (gdisp->gimage)))
- {
- case INDEXED_GIMAGE:
- case INDEXEDA_GIMAGE:
- gdisplay_install_tool_cursor (gdisp, GIMP_BAD_CURSOR,
- BLEND,
- CURSOR_MODIFIER_NONE,
- FALSE);
- break;
- default:
- gdisplay_install_tool_cursor (gdisp, GIMP_MOUSE_CURSOR,
- BLEND,
- CURSOR_MODIFIER_NONE,
- FALSE);
- break;
- }
- }
-
- static void
- blend_draw (Tool *tool)
- {
- GDisplay * gdisp;
- BlendTool * blend_tool;
- int tx1, ty1, tx2, ty2;
-
- gdisp = (GDisplay *) tool->gdisp_ptr;
- blend_tool = (BlendTool *) tool->private;
-
- gdisplay_transform_coords (gdisp, blend_tool->startx, blend_tool->starty,
- &tx1, &ty1, 1);
- gdisplay_transform_coords (gdisp, blend_tool->endx, blend_tool->endy,
- &tx2, &ty2, 1);
-
- /* Draw start target */
- gdk_draw_line (blend_tool->core->win, blend_tool->core->gc,
- tx1 - (TARGET_WIDTH >> 1), ty1,
- tx1 + (TARGET_WIDTH >> 1), ty1);
- gdk_draw_line (blend_tool->core->win, blend_tool->core->gc,
- tx1, ty1 - (TARGET_HEIGHT >> 1),
- tx1, ty1 + (TARGET_HEIGHT >> 1));
-
- /* Draw end target */
- gdk_draw_line (blend_tool->core->win, blend_tool->core->gc,
- tx2 - (TARGET_WIDTH >> 1), ty2,
- tx2 + (TARGET_WIDTH >> 1), ty2);
- gdk_draw_line (blend_tool->core->win, blend_tool->core->gc,
- tx2, ty2 - (TARGET_HEIGHT >> 1),
- tx2, ty2 + (TARGET_HEIGHT >> 1));
-
- /* Draw the line between the start and end coords */
- gdk_draw_line (blend_tool->core->win, blend_tool->core->gc,
- tx1, ty1, tx2, ty2);
- }
-
- static void
- blend_control (Tool *tool,
- ToolAction action,
- gpointer gdisp_ptr)
- {
- BlendTool * blend_tool;
-
- blend_tool = (BlendTool *) tool->private;
-
- switch (action)
- {
- case PAUSE:
- draw_core_pause (blend_tool->core, tool);
- break;
-
- case RESUME:
- draw_core_resume (blend_tool->core, tool);
- break;
-
- case HALT:
- draw_core_stop (blend_tool->core, tool);
- break;
-
- default:
- break;
- }
- }
-
-
- static void
- blend_options_drop_gradient (GtkWidget *widget,
- gradient_t *gradient,
- gpointer data)
- {
- gimp_context_set_gradient (gimp_context_get_user (), gradient);
- gtk_option_menu_set_history (GTK_OPTION_MENU (blend_options->blend_mode_w),
- CUSTOM_MODE);
- blend_options->blend_mode = CUSTOM_MODE;
- }
-
- static void
- blend_options_drop_tool (GtkWidget *widget,
- ToolType tool,
- gpointer data)
- {
- gimp_context_set_tool (gimp_context_get_user (), tool);
- }
-
-
- /*****/
-
- /* The actual blending procedure */
- void
- blend (GImage *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,
- progress_func_t progress_callback,
- void *progress_data)
- {
- TileManager *buf_tiles;
- PixelRegion bufPR;
- int has_alpha;
- int has_selection;
- int bytes;
- int x1, y1, x2, y2;
-
- gimp_add_busy_cursors();
-
- has_selection = drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
-
- has_alpha = drawable_has_alpha (drawable);
- bytes = 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);
- gimage_apply_image (gimage, drawable, &bufPR, TRUE,
- (opacity * 255) / 100, paint_mode, NULL, x1, y1);
-
- /* update the image */
- drawable_update (drawable, x1, y1, (x2 - x1), (y2 - y1));
-
- /* free the temporary buffer */
- tile_manager_destroy (buf_tiles);
-
- gimp_remove_busy_cursors(NULL);
- }
-
-
- static double
- gradient_calc_conical_sym_factor (double dist,
- double *axis,
- double offset,
- double x,
- double y)
- {
- double vec[2];
- double r;
- double 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;
- } /* gradient_calc_conical_sym_factor */
-
-
- /*****/
-
- static double
- gradient_calc_conical_asym_factor (double dist,
- double *axis,
- double offset,
- double x,
- double y)
- {
- double ang0, ang1;
- double ang;
- double 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 */
- } /* else */
-
- return rat;
- } /* gradient_calc_conical_asym_factor */
-
-
- /*****/
-
- static double
- gradient_calc_square_factor (double dist,
- double offset,
- double x,
- double y)
- {
- double r;
- double 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);
- } /* else */
-
- return rat;
- } /* gradient_calc_square_factor */
-
-
- /*****/
-
- static double
- gradient_calc_radial_factor (double dist,
- double offset,
- double x,
- double y)
- {
- double r;
- double 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);
- } /* else */
-
- return rat;
- } /* gradient_calc_radial_factor */
-
-
- /*****/
-
- static double
- gradient_calc_linear_factor (double dist,
- double *vec,
- double offset,
- double x,
- double 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);
- } /* else */
-
- return rat;
- } /* gradient_calc_linear_factor */
-
-
- /*****/
-
- static double
- gradient_calc_bilinear_factor (double dist,
- double *vec,
- double offset,
- double x,
- double y)
- {
- double r;
- double 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);
- } /* else */
-
- return rat;
- } /* gradient_calc_bilinear_factor */
-
- static double
- gradient_calc_spiral_factor (double dist,
- double *axis,
- double offset,
- double x,
- double y,
- gint cwise)
- {
- double ang0, ang1;
- double ang, r;
- double 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 double
- gradient_calc_shapeburst_angular_factor (double x,
- double y)
- {
- int ix, iy;
- Tile *tile;
- float 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 double
- gradient_calc_shapeburst_spherical_factor (double x,
- double y)
- {
- int ix, iy;
- Tile *tile;
- float 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 = 1.0 - sin (0.5 * G_PI * value);
- tile_release (tile, FALSE);
-
- return value;
- }
-
-
- static double
- gradient_calc_shapeburst_dimpled_factor (double x,
- double y)
- {
- int ix, iy;
- Tile *tile;
- float 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 double
- gradient_repeat_none (double val)
- {
- return CLAMP(val, 0.0, 1.0);
- }
-
- static double
- gradient_repeat_sawtooth (double val)
- {
- if (val >= 0.0)
- return fmod(val, 1.0);
- else
- return 1.0 - fmod(-val, 1.0);
- }
-
- static double
- gradient_repeat_triangular (double val)
- {
- int 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 (GImage *gimage,
- GimpDrawable *drawable,
- PixelRegion *PR,
- double dist)
- {
- Channel *mask;
- PixelRegion tempR;
- float max_iteration;
- float *distp;
- int size;
- void * pr;
- unsigned char 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 (float));
-
- /* 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;
- int x1, y1, x2, y2;
- int offx, offy;
-
- drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
- drawable_offsets (drawable, &offx, &offy);
-
- /* the selection mask */
- mask = gimage_get_mask (gimage);
- pixel_region_init (&maskR, 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 (drawable_has_alpha (drawable))
- {
- PixelRegion drawableR;
-
- pixel_region_init (&drawableR, drawable_data (drawable), PR->x, PR->y, PR->w, PR->h, FALSE);
-
- extract_alpha_region (&drawableR, NULL, &tempR);
- }
- /* Otherwise, just fill the shapeburst to white */
- else
- 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 = (float *) 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,
- color_t *color,
- void *render_data)
- {
- RenderBlendData *rbd;
- double 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)
- gradient_get_color_at (gimp_context_get_gradient (NULL),
- factor, &color->r, &color->g, &color->b, &color->a);
- 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,
- color_t color,
- void *put_pixel_data)
- {
- PutPixelData *ppd;
- unsigned char *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 (GImage *gimage,
- GimpDrawable *drawable,
- PixelRegion *PR,
- int width,
- int height,
- BlendMode blend_mode,
- GradientType gradient_type,
- double offset,
- RepeatMode repeat,
- int supersample,
- int max_depth,
- double threshold,
- double sx,
- double sy,
- double ex,
- double ey,
- progress_func_t progress_callback,
- void *progress_data)
- {
- RenderBlendData rbd;
- PutPixelData ppd;
- unsigned char r, g, b;
- int x, y;
- int endx, endy;
- void *pr;
- unsigned char *data;
- color_t color;
-
- /* Get foreground and background colors, normalized */
-
- gimp_context_get_foreground (NULL, &r, &g, &b);
-
- rbd.fg.r = r / 255.0;
- rbd.fg.g = g / 255.0;
- rbd.fg.b = b / 255.0;
- rbd.fg.a = 1.0; /* Foreground is always opaque */
-
- gimp_context_get_background (NULL, &r, &g, &b);
-
- rbd.bg.r = r / 255.0;
- rbd.bg.g = g / 255.0;
- rbd.bg.b = b / 255.0;
- 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",
- (int) 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",
- (int) 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",
- (int) 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! */
-
- 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
- {
- int max_progress = PR->w * PR->h;
- int 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);
- }
- }
- }
-
- /****************************/
- /* Global blend functions */
- /****************************/
-
- Tool *
- tools_new_blend ()
- {
- Tool * tool;
- BlendTool * private;
-
- /* The tool options */
- if (! blend_options)
- {
- blend_options = blend_options_new ();
- tools_register (BLEND, (ToolOptions *) blend_options);
- }
-
- tool = tools_new_tool (BLEND);
- private = g_new0 (BlendTool, 1);
-
- private->core = draw_core_new (blend_draw);
-
- tool->scroll_lock = TRUE; /* Disallow scrolling */
-
- tool->private = (void *) private;
-
- tool->button_press_func = blend_button_press;
- tool->button_release_func = blend_button_release;
- tool->motion_func = blend_motion;
- tool->cursor_update_func = blend_cursor_update;
- tool->control_func = blend_control;
-
- return tool;
- }
-
- void
- tools_free_blend (Tool *tool)
- {
- BlendTool * blend_tool;
-
- blend_tool = (BlendTool *) tool->private;
-
- if (tool->state == ACTIVE)
- draw_core_stop (blend_tool->core, tool);
-
- draw_core_free (blend_tool->core);
-
- /* free the distance map data if it exists */
- if (distR.tiles)
- tile_manager_destroy (distR.tiles);
- distR.tiles = NULL;
-
- g_free (blend_tool);
- }
-