/* 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 #include #include #include #include "libgimpcolor/gimpcolor.h" #include "libgimpwidgets/gimpwidgets.h" #include "tools-types.h" #include "config/gimpbaseconfig.h" #include "config/gimpguiconfig.h" #include "base/curves.h" #include "base/gimphistogram.h" #include "base/gimplut.h" #include "core/gimp.h" #include "core/gimpdrawable.h" #include "core/gimpdrawable-histogram.h" #include "core/gimpimage.h" #include "core/gimpimagemap.h" #include "core/gimptoolinfo.h" #include "widgets/gimpcolorbar.h" #include "widgets/gimpcursor.h" #include "widgets/gimpenumcombobox.h" #include "widgets/gimpenumstore.h" #include "widgets/gimpenumwidgets.h" #include "widgets/gimphelp-ids.h" #include "widgets/gimphistogramview.h" #include "widgets/gimppropwidgets.h" #include "display/gimpdisplay.h" #include "gimpcurvestool.h" #include "gimphistogramoptions.h" #include "gimptoolcontrol.h" #include "gimp-intl.h" #define XRANGE (1 << 0) #define YRANGE (1 << 1) #define GRAPH (1 << 2) #define ALL (XRANGE | YRANGE | GRAPH) #define GRAPH_SIZE 256 #define BAR_SIZE 12 #define RADIUS 3 #define MIN_DISTANCE 8 /* local function prototypes */ static void gimp_curves_tool_class_init (GimpCurvesToolClass *klass); static void gimp_curves_tool_init (GimpCurvesTool *tool); static void gimp_curves_tool_finalize (GObject *object); static gboolean gimp_curves_tool_initialize (GimpTool *tool, GimpDisplay *gdisp); static void gimp_curves_tool_button_release (GimpTool *tool, GimpCoords *coords, guint32 time, GdkModifierType state, GimpDisplay *gdisp); static void gimp_curves_tool_color_picked (GimpColorTool *color_tool, GimpColorPickState pick_state, GimpImageType sample_type, GimpRGB *color, gint color_index); static void gimp_curves_tool_map (GimpImageMapTool *image_map_tool); static void gimp_curves_tool_dialog (GimpImageMapTool *image_map_tool); static void gimp_curves_tool_reset (GimpImageMapTool *image_map_tool); static gboolean gimp_curves_tool_settings_load (GimpImageMapTool *image_map_tool, gpointer fp); static gboolean gimp_curves_tool_settings_save (GimpImageMapTool *image_map_tool, gpointer fp); static void curves_add_point (GimpCurvesTool *tool, gint x, gint y, gint cchan); static void curves_update (GimpCurvesTool *tool, gint update); static void curves_channel_callback (GtkWidget *widget, GimpCurvesTool *tool); static void curves_channel_reset_callback (GtkWidget *widget, GimpCurvesTool *tool); static gboolean curves_menu_visible_func (GtkTreeModel *model, GtkTreeIter *iter, gpointer data); static void curves_curve_type_callback (GtkWidget *widget, GimpCurvesTool *tool); static gboolean curves_graph_events (GtkWidget *widget, GdkEvent *event, GimpCurvesTool *tool); static gboolean curves_graph_expose (GtkWidget *widget, GdkEventExpose *eevent, GimpCurvesTool *tool); static GimpImageMapToolClass *parent_class = NULL; /* public functions */ void gimp_curves_tool_register (GimpToolRegisterCallback callback, gpointer data) { (* callback) (GIMP_TYPE_CURVES_TOOL, GIMP_TYPE_HISTOGRAM_OPTIONS, gimp_color_options_gui, 0, "gimp-curves-tool", _("Curves"), _("Adjust color curves"), N_("_Curves..."), NULL, NULL, GIMP_HELP_TOOL_CURVES, GIMP_STOCK_TOOL_CURVES, data); } GType gimp_curves_tool_get_type (void) { static GType tool_type = 0; if (! tool_type) { static const GTypeInfo tool_info = { sizeof (GimpCurvesToolClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) gimp_curves_tool_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GimpCurvesTool), 0, /* n_preallocs */ (GInstanceInitFunc) gimp_curves_tool_init, }; tool_type = g_type_register_static (GIMP_TYPE_IMAGE_MAP_TOOL, "GimpCurvesTool", &tool_info, 0); } return tool_type; } /* private functions */ static void gimp_curves_tool_class_init (GimpCurvesToolClass *klass) { GObjectClass *object_class; GimpToolClass *tool_class; GimpColorToolClass *color_tool_class; GimpImageMapToolClass *image_map_tool_class; object_class = G_OBJECT_CLASS (klass); tool_class = GIMP_TOOL_CLASS (klass); color_tool_class = GIMP_COLOR_TOOL_CLASS (klass); image_map_tool_class = GIMP_IMAGE_MAP_TOOL_CLASS (klass); parent_class = g_type_class_peek_parent (klass); object_class->finalize = gimp_curves_tool_finalize; tool_class->initialize = gimp_curves_tool_initialize; tool_class->button_release = gimp_curves_tool_button_release; color_tool_class->picked = gimp_curves_tool_color_picked; image_map_tool_class->shell_desc = _("Adjust Color Curves"); image_map_tool_class->settings_name = "curves"; image_map_tool_class->load_dialog_title = _("Load Curves"); image_map_tool_class->save_dialog_title = _("Save Curves"); image_map_tool_class->map = gimp_curves_tool_map; image_map_tool_class->dialog = gimp_curves_tool_dialog; image_map_tool_class->reset = gimp_curves_tool_reset; image_map_tool_class->settings_load = gimp_curves_tool_settings_load; image_map_tool_class->settings_save = gimp_curves_tool_settings_save; } static void gimp_curves_tool_init (GimpCurvesTool *tool) { gint i; tool->curves = g_new0 (Curves, 1); tool->lut = gimp_lut_new (); tool->channel = GIMP_HISTOGRAM_VALUE; curves_init (tool->curves); for (i = 0; i < G_N_ELEMENTS (tool->col_value); i++) tool->col_value[i] = -1; tool->cursor_x = -1; tool->cursor_y = -1; } static void gimp_curves_tool_finalize (GObject *object) { GimpCurvesTool *tool = GIMP_CURVES_TOOL (object); if (tool->curves) { g_free (tool->curves); tool->curves = NULL; } if (tool->lut) { gimp_lut_free (tool->lut); tool->lut = NULL; } if (tool->hist) { gimp_histogram_free (tool->hist); tool->hist = NULL; } if (tool->cursor_layout) { g_object_unref (tool->cursor_layout); tool->cursor_layout = NULL; } if (tool->xpos_layout) { g_object_unref (tool->xpos_layout); tool->xpos_layout = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } static gboolean gimp_curves_tool_initialize (GimpTool *tool, GimpDisplay *gdisp) { GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool); GimpDrawable *drawable; drawable = gimp_image_active_drawable (gdisp->gimage); if (! drawable) return FALSE; if (gimp_drawable_is_indexed (drawable)) { g_message (_("Curves for indexed layers cannot be adjusted.")); return FALSE; } if (! c_tool->hist) { Gimp *gimp = GIMP_TOOL (c_tool)->tool_info->gimp; c_tool->hist = gimp_histogram_new (GIMP_BASE_CONFIG (gimp->config)); } curves_init (c_tool->curves); c_tool->channel = GIMP_HISTOGRAM_VALUE; c_tool->color = gimp_drawable_is_rgb (drawable); c_tool->alpha = gimp_drawable_has_alpha (drawable); c_tool->grab_point = -1; c_tool->last = 0; GIMP_TOOL_CLASS (parent_class)->initialize (tool, gdisp); /* always pick colors */ gimp_color_tool_enable (GIMP_COLOR_TOOL (tool), GIMP_COLOR_OPTIONS (tool->tool_info->tool_options)); gimp_enum_combo_box_set_visible (GIMP_ENUM_COMBO_BOX (c_tool->channel_menu), curves_menu_visible_func, c_tool); gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (c_tool->channel_menu), c_tool->channel); /* FIXME: hack */ if (! c_tool->color) c_tool->channel = (c_tool->channel == GIMP_HISTOGRAM_ALPHA) ? 1 : 0; gimp_drawable_calculate_histogram (drawable, c_tool->hist); gimp_histogram_view_set_histogram (GIMP_HISTOGRAM_VIEW (c_tool->graph), c_tool->hist); curves_update (c_tool, ALL); return TRUE; } static void gimp_curves_tool_button_release (GimpTool *tool, GimpCoords *coords, guint32 time, GdkModifierType state, GimpDisplay *gdisp) { GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool); GimpDrawable *drawable; drawable = gimp_image_active_drawable (gdisp->gimage); if (state & GDK_SHIFT_MASK) { curves_add_point (c_tool, coords->x, coords->y, c_tool->channel); curves_calculate_curve (c_tool->curves, c_tool->channel); } else if (state & GDK_CONTROL_MASK) { gint i; for (i = 0; i < 5; i++) { curves_add_point (c_tool, coords->x, coords->y, i); curves_calculate_curve (c_tool->curves, c_tool->channel); } } /* chain up to halt the tool */ GIMP_TOOL_CLASS (parent_class)->button_release (tool, coords, time, state, gdisp); } static void gimp_curves_tool_color_picked (GimpColorTool *color_tool, GimpColorPickState pick_state, GimpImageType sample_type, GimpRGB *color, gint color_index) { GimpCurvesTool *tool = GIMP_CURVES_TOOL (color_tool); GimpDrawable *drawable; guchar r, g, b, a; drawable = GIMP_IMAGE_MAP_TOOL (tool)->drawable; gimp_rgba_get_uchar (color, &r, &g, &b, &a); tool->col_value[GIMP_HISTOGRAM_RED] = r; tool->col_value[GIMP_HISTOGRAM_GREEN] = g; tool->col_value[GIMP_HISTOGRAM_BLUE] = b; if (gimp_drawable_has_alpha (drawable)) tool->col_value[GIMP_HISTOGRAM_ALPHA] = a; if (gimp_drawable_is_indexed (drawable)) tool->col_value[GIMP_HISTOGRAM_ALPHA] = color_index; tool->col_value[GIMP_HISTOGRAM_VALUE] = MAX (MAX (r, g), b); curves_update (tool, GRAPH); } static void curves_add_point (GimpCurvesTool *tool, gint x, gint y, gint cchan) { /* Add point onto the curve */ gint closest_point = 0; gint distance; gint curvex; gint i; switch (tool->curves->curve_type[cchan]) { case GIMP_CURVE_SMOOTH: curvex = tool->col_value[cchan]; distance = G_MAXINT; for (i = 0; i < 17; i++) { if (tool->curves->points[cchan][i][0] != -1) if (abs (curvex - tool->curves->points[cchan][i][0]) < distance) { distance = abs (curvex - tool->curves->points[cchan][i][0]); closest_point = i; } } if (distance > MIN_DISTANCE) closest_point = (curvex + 8) / 16; tool->curves->points[cchan][closest_point][0] = curvex; tool->curves->points[cchan][closest_point][1] = tool->curves->curve[cchan][curvex]; break; case GIMP_CURVE_FREE: tool->curves->curve[cchan][x] = 255 - y; break; } } static void gimp_curves_tool_map (GimpImageMapTool *image_map_tool) { GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool); gimp_lut_setup (tool->lut, (GimpLutFunc) curves_lut_func, tool->curves, gimp_drawable_bytes (image_map_tool->drawable)); gimp_image_map_apply (image_map_tool->image_map, (GimpImageMapApplyFunc) gimp_lut_process_2, tool->lut); } /*******************/ /* Curves dialog */ /*******************/ static void gimp_curves_tool_dialog (GimpImageMapTool *image_map_tool) { GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool); GimpToolOptions *tool_options; GtkWidget *vbox; GtkWidget *vbox2; GtkWidget *hbox; GtkWidget *hbox2; GtkWidget *label; GtkWidget *bbox; GtkWidget *frame; GtkWidget *menu; GtkWidget *table; GtkWidget *button; GtkWidget *bar; gint padding; tool_options = GIMP_TOOL (tool)->tool_info->tool_options; vbox = image_map_tool->main_vbox; /* The option menu for selecting channels */ hbox = gtk_hbox_new (FALSE, 6); gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0); gtk_widget_show (hbox); label = gtk_label_new (_("Channel:")); gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0); gtk_widget_show (label); menu = gimp_enum_combo_box_new (GIMP_TYPE_HISTOGRAM_CHANNEL); g_signal_connect (menu, "changed", G_CALLBACK (curves_channel_callback), tool); gimp_enum_combo_box_set_stock_prefix (GIMP_ENUM_COMBO_BOX (menu), "gimp-channel"); gtk_box_pack_start (GTK_BOX (hbox), menu, FALSE, FALSE, 0); gtk_widget_show (menu); tool->channel_menu = menu; button = gtk_button_new_with_mnemonic (_("R_eset channel")); gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0); gtk_widget_show (button); g_signal_connect (button, "clicked", G_CALLBACK (curves_channel_reset_callback), tool); menu = gimp_prop_enum_stock_box_new (G_OBJECT (tool_options), "histogram-scale", "gimp-histogram", 0, 0); gtk_box_pack_end (GTK_BOX (hbox), menu, FALSE, FALSE, 0); gtk_widget_show (menu); /* The table for the color bars and the graph */ table = gtk_table_new (2, 2, FALSE); gtk_table_set_col_spacings (GTK_TABLE (table), 2); gtk_table_set_row_spacings (GTK_TABLE (table), 2); gtk_box_pack_start (GTK_BOX (vbox), table, TRUE, TRUE, 0); /* The left color bar */ vbox2 = gtk_vbox_new (FALSE, 0); gtk_table_attach (GTK_TABLE (table), vbox2, 0, 1, 0, 1, GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0); gtk_widget_show (vbox2); frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN); gtk_box_pack_start (GTK_BOX (vbox2), frame, TRUE, TRUE, RADIUS); gtk_widget_show (frame); tool->yrange = gimp_color_bar_new (GTK_ORIENTATION_VERTICAL); gtk_widget_set_size_request (tool->yrange, BAR_SIZE, -1); gtk_container_add (GTK_CONTAINER (frame), tool->yrange); gtk_widget_show (tool->yrange); /* The curves graph */ frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN); gtk_table_attach (GTK_TABLE (table), frame, 1, 2, 0, 1, GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0); gtk_widget_show (frame); tool->graph = gimp_histogram_view_new (FALSE); gtk_widget_set_size_request (tool->graph, GRAPH_SIZE + RADIUS * 2, GRAPH_SIZE + RADIUS * 2); gtk_widget_add_events (tool->graph, (GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_LEAVE_NOTIFY_MASK)); g_object_set (tool->graph, "border-width", RADIUS, "subdivisions", 1, NULL); GIMP_HISTOGRAM_VIEW (tool->graph)->light_histogram = TRUE; gtk_container_add (GTK_CONTAINER (frame), tool->graph); gtk_widget_show (tool->graph); g_signal_connect (tool->graph, "event", G_CALLBACK (curves_graph_events), tool); g_signal_connect_after (tool->graph, "expose_event", G_CALLBACK (curves_graph_expose), tool); gimp_histogram_options_connect_view (GIMP_HISTOGRAM_OPTIONS (tool_options), GIMP_HISTOGRAM_VIEW (tool->graph)); /* The bottom color bar */ hbox2 = gtk_hbox_new (FALSE, 0); gtk_table_attach (GTK_TABLE (table), hbox2, 1, 2, 1, 2, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0); gtk_widget_show (hbox2); frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN); gtk_box_pack_start (GTK_BOX (hbox2), frame, TRUE, TRUE, RADIUS); gtk_widget_show (frame); vbox2 = gtk_vbox_new (TRUE, 0); gtk_container_add (GTK_CONTAINER (frame), vbox2); gtk_widget_show (vbox2); tool->xrange = gimp_color_bar_new (GTK_ORIENTATION_HORIZONTAL); gtk_widget_set_size_request (tool->xrange, -1, BAR_SIZE / 2); gtk_box_pack_start (GTK_BOX (vbox2), tool->xrange, TRUE, TRUE, 0); gtk_widget_show (tool->xrange); bar = gimp_color_bar_new (GTK_ORIENTATION_HORIZONTAL); gtk_box_pack_start (GTK_BOX (vbox2), bar, TRUE, TRUE, 0); gtk_widget_show (bar); gtk_widget_show (table); hbox = gtk_hbox_new (FALSE, 6); gtk_box_pack_end (GTK_BOX (vbox), hbox, FALSE, FALSE, 0); gtk_widget_show (hbox); /* Horizontal button box for load / save */ frame = gimp_frame_new (_("All Channels")); gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0); gtk_widget_show (frame); bbox = gtk_hbutton_box_new (); gtk_container_set_border_width (GTK_CONTAINER (bbox), 2); gtk_box_set_spacing (GTK_BOX (bbox), 4); gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), GTK_BUTTONBOX_SPREAD); gtk_container_add (GTK_CONTAINER (frame), bbox); gtk_widget_show (bbox); gtk_box_pack_start (GTK_BOX (bbox), image_map_tool->load_button, FALSE, FALSE, 0); gimp_help_set_help_data (image_map_tool->load_button, _("Read curves settings from file"), NULL); gtk_widget_show (image_map_tool->load_button); gtk_box_pack_start (GTK_BOX (bbox), image_map_tool->save_button, FALSE, FALSE, 0); gimp_help_set_help_data (image_map_tool->save_button, _("Save curves settings to file"), NULL); gtk_widget_show (image_map_tool->save_button); /* The radio box for selecting the curve type */ frame = gimp_frame_new (_("Curve Type")); gtk_box_pack_end (GTK_BOX (hbox), frame, FALSE, FALSE, 0); gtk_widget_show (frame); hbox = gimp_enum_stock_box_new (GIMP_TYPE_CURVE_TYPE, "gimp-curve", GTK_ICON_SIZE_MENU, G_CALLBACK (curves_curve_type_callback), tool, &tool->curve_type); gtk_widget_style_get (bbox, "child_internal_pad_x", &padding, NULL); gimp_enum_stock_box_set_child_padding (hbox, padding, -1); gtk_container_set_border_width (GTK_CONTAINER (hbox), 2); gtk_box_set_spacing (GTK_BOX (hbox), 4); gtk_container_add (GTK_CONTAINER (frame), hbox); gtk_widget_show (hbox); } static void gimp_curves_tool_reset (GimpImageMapTool *image_map_tool) { GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool); GimpHistogramChannel channel; tool->grab_point = -1; for (channel = GIMP_HISTOGRAM_VALUE; channel <= GIMP_HISTOGRAM_ALPHA; channel++) curves_channel_reset (tool->curves, channel); curves_update (tool, XRANGE | GRAPH); } static gboolean gimp_curves_tool_settings_load (GimpImageMapTool *image_map_tool, gpointer fp) { GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool); FILE *file = fp; gint i, j; gint fields; gchar buf[50]; gint index[5][17]; gint value[5][17]; if (! fgets (buf, sizeof (buf), file)) return FALSE; if (strcmp (buf, "# GIMP Curves File\n") != 0) return FALSE; for (i = 0; i < 5; i++) { for (j = 0; j < 17; j++) { fields = fscanf (file, "%d %d ", &index[i][j], &value[i][j]); if (fields != 2) { /* FIXME: should have a helpful error message here */ g_printerr ("fields != 2"); return FALSE; } } } for (i = 0; i < 5; i++) { tool->curves->curve_type[i] = GIMP_CURVE_SMOOTH; for (j = 0; j < 17; j++) { tool->curves->points[i][j][0] = index[i][j]; tool->curves->points[i][j][1] = value[i][j]; } } for (i = 0; i < 5; i++) curves_calculate_curve (tool->curves, i); curves_update (tool, ALL); gimp_int_radio_group_set_active (GTK_RADIO_BUTTON (tool->curve_type), GIMP_CURVE_SMOOTH); return TRUE; } static gboolean gimp_curves_tool_settings_save (GimpImageMapTool *image_map_tool, gpointer fp) { GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool); FILE *file = fp; gint i, j; gint32 index; for (i = 0; i < 5; i++) if (tool->curves->curve_type[i] == GIMP_CURVE_FREE) { /* pick representative points from the curve and make them control points */ for (j = 0; j <= 8; j++) { index = CLAMP0255 (j * 32); tool->curves->points[i][j * 2][0] = index; tool->curves->points[i][j * 2][1] = tool->curves->curve[i][index]; } } fprintf (file, "# GIMP Curves File\n"); for (i = 0; i < 5; i++) { for (j = 0; j < 17; j++) fprintf (file, "%d %d ", tool->curves->points[i][j][0], tool->curves->points[i][j][1]); fprintf (file, "\n"); } return TRUE; } /* TODO: preview alpha channel stuff correctly. -- austin, 20/May/99 */ static void curves_update (GimpCurvesTool *tool, gint update) { GimpHistogramChannel channel; if (tool->color) { channel = tool->channel; } else { /* FIXME: hack */ if (tool->channel == 1) channel = GIMP_HISTOGRAM_ALPHA; else channel = GIMP_HISTOGRAM_VALUE; } if (update & GRAPH) gtk_widget_queue_draw (tool->graph); if (update & XRANGE) { switch (channel) { case GIMP_HISTOGRAM_VALUE: case GIMP_HISTOGRAM_ALPHA: case GIMP_HISTOGRAM_RGB: gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->xrange), tool->curves->curve[tool->channel], tool->curves->curve[tool->channel], tool->curves->curve[tool->channel]); break; case GIMP_HISTOGRAM_RED: case GIMP_HISTOGRAM_GREEN: case GIMP_HISTOGRAM_BLUE: gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->xrange), tool->curves->curve[GIMP_HISTOGRAM_RED], tool->curves->curve[GIMP_HISTOGRAM_GREEN], tool->curves->curve[GIMP_HISTOGRAM_BLUE]); break; } } if (update & YRANGE) { gimp_color_bar_set_channel (GIMP_COLOR_BAR (tool->yrange), channel); } } static void curves_channel_callback (GtkWidget *widget, GimpCurvesTool *tool) { gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), (gint *) &tool->channel); gimp_histogram_view_set_channel (GIMP_HISTOGRAM_VIEW (tool->graph), tool->channel); /* FIXME: hack */ if (! tool->color) tool->channel = (tool->channel == GIMP_HISTOGRAM_ALPHA) ? 1 : 0; gimp_int_radio_group_set_active (GTK_RADIO_BUTTON (tool->curve_type), tool->curves->curve_type[tool->channel]); curves_update (tool, ALL); } static void curves_channel_reset_callback (GtkWidget *widget, GimpCurvesTool *tool) { tool->grab_point = -1; curves_channel_reset (tool->curves, tool->channel); curves_update (tool, XRANGE | GRAPH); gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool)); } static gboolean curves_menu_visible_func (GtkTreeModel *model, GtkTreeIter *iter, gpointer data) { GimpCurvesTool *tool = GIMP_CURVES_TOOL (data); GimpHistogramChannel channel; gtk_tree_model_get (model, iter, GIMP_INT_STORE_VALUE, &channel, -1); switch (channel) { case GIMP_HISTOGRAM_VALUE: return TRUE; case GIMP_HISTOGRAM_RED: case GIMP_HISTOGRAM_GREEN: case GIMP_HISTOGRAM_BLUE: return tool->color; case GIMP_HISTOGRAM_ALPHA: return tool->alpha; case GIMP_HISTOGRAM_RGB: return FALSE; } return FALSE; } static void curves_curve_type_callback (GtkWidget *widget, GimpCurvesTool *tool) { GimpCurveType curve_type; gimp_radio_button_update (widget, &curve_type); if (tool->curves->curve_type[tool->channel] != curve_type) { tool->curves->curve_type[tool->channel] = curve_type; if (curve_type == GIMP_CURVE_SMOOTH) { gint i; gint32 index; /* pick representative points from the curve * and make them control points */ for (i = 0; i <= 8; i++) { index = CLAMP0255 (i * 32); tool->curves->points[tool->channel][i * 2][0] = index; tool->curves->points[tool->channel][i * 2][1] = tool->curves->curve[tool->channel][index]; } } curves_calculate_curve (tool->curves, tool->channel); curves_update (tool, XRANGE | GRAPH); gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool)); } } static gboolean curves_graph_events (GtkWidget *widget, GdkEvent *event, GimpCurvesTool *tool) { static GimpCursorType cursor_type = GDK_TOP_LEFT_ARROW; GimpCursorType new_cursor = GDK_X_CURSOR; GdkEventButton *bevent; GdkEventMotion *mevent; gint i; gint tx, ty; gint x, y; gint width, height; gint closest_point; gint distance; gint x1, x2, y1, y2; width = widget->allocation.width - 2 * RADIUS; height = widget->allocation.height - 2 * RADIUS; /* get the pointer position */ gdk_window_get_pointer (tool->graph->window, &tx, &ty, NULL); x = ROUND (((gdouble) (tx - RADIUS) / (gdouble) width) * 255.0); y = ROUND (((gdouble) (ty - RADIUS) / (gdouble) height) * 255.0); x = CLAMP0255 (x); y = CLAMP0255 (y); distance = G_MAXINT; for (i = 0, closest_point = 0; i < 17; i++) { if (tool->curves->points[tool->channel][i][0] != -1) if (abs (x - tool->curves->points[tool->channel][i][0]) < distance) { distance = abs (x - tool->curves->points[tool->channel][i][0]); closest_point = i; } } if (distance > MIN_DISTANCE) closest_point = (x + 8) / 16; switch (event->type) { case GDK_BUTTON_PRESS: bevent = (GdkEventButton *) event; if (bevent->button != 1) return TRUE; new_cursor = GDK_TCROSS; switch (tool->curves->curve_type[tool->channel]) { case GIMP_CURVE_SMOOTH: /* determine the leftmost and rightmost points */ tool->leftmost = -1; for (i = closest_point - 1; i >= 0; i--) if (tool->curves->points[tool->channel][i][0] != -1) { tool->leftmost = tool->curves->points[tool->channel][i][0]; break; } tool->rightmost = 256; for (i = closest_point + 1; i < 17; i++) if (tool->curves->points[tool->channel][i][0] != -1) { tool->rightmost = tool->curves->points[tool->channel][i][0]; break; } tool->grab_point = closest_point; tool->curves->points[tool->channel][tool->grab_point][0] = x; tool->curves->points[tool->channel][tool->grab_point][1] = 255 - y; break; case GIMP_CURVE_FREE: tool->curves->curve[tool->channel][x] = 255 - y; tool->grab_point = x; tool->last = y; break; } curves_calculate_curve (tool->curves, tool->channel); curves_update (tool, XRANGE | GRAPH); return TRUE; case GDK_BUTTON_RELEASE: bevent = (GdkEventButton *) event; if (bevent->button != 1) return TRUE; new_cursor = GDK_FLEUR; tool->grab_point = -1; gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool)); return TRUE; case GDK_MOTION_NOTIFY: mevent = (GdkEventMotion *) event; switch (tool->curves->curve_type[tool->channel]) { case GIMP_CURVE_SMOOTH: /* If no point is grabbed... */ if (tool->grab_point == -1) { if (tool->curves->points[tool->channel][closest_point][0] != -1) new_cursor = GDK_FLEUR; else new_cursor = GDK_TCROSS; } /* Else, drag the grabbed point */ else { new_cursor = GDK_TCROSS; tool->curves->points[tool->channel][tool->grab_point][0] = -1; if (x > tool->leftmost && x < tool->rightmost) { closest_point = (x + 8) / 16; if (tool->curves->points[tool->channel][closest_point][0] == -1) tool->grab_point = closest_point; tool->curves->points[tool->channel][tool->grab_point][0] = x; tool->curves->points[tool->channel][tool->grab_point][1] = 255 - y; } curves_calculate_curve (tool->curves, tool->channel); } break; case GIMP_CURVE_FREE: if (tool->grab_point != -1) { if (tool->grab_point > x) { x1 = x; x2 = tool->grab_point; y1 = y; y2 = tool->last; } else { x1 = tool->grab_point; x2 = x; y1 = tool->last; y2 = y; } if (x2 != x1) for (i = x1; i <= x2; i++) tool->curves->curve[tool->channel][i] = 255 - (y1 + ((y2 - y1) * (i - x1)) / (x2 - x1)); else tool->curves->curve[tool->channel][x] = 255 - y; tool->grab_point = x; tool->last = y; } if (mevent->state & GDK_BUTTON1_MASK) new_cursor = GDK_TCROSS; else new_cursor = GDK_PENCIL; break; } if (new_cursor != cursor_type) { cursor_type = new_cursor; gimp_cursor_set (tool->graph, GIMP_GUI_CONFIG (GIMP_TOOL (tool)->tool_info->gimp->config)->cursor_format, cursor_type, GIMP_TOOL_CURSOR_NONE, GIMP_CURSOR_MODIFIER_NONE); } tool->cursor_x = x; tool->cursor_y = y; curves_update (tool, XRANGE | GRAPH); return TRUE; case GDK_LEAVE_NOTIFY: tool->cursor_x = -1; tool->cursor_y = -1; curves_update (tool, GRAPH); return TRUE; default: break; } return FALSE; } static void curve_print_loc (GimpCurvesTool *tool) { gchar buf[32]; gint x, y; gint w, h; if (tool->cursor_x < 0 || tool->cursor_x > 255 || tool->cursor_y < 0 || tool->cursor_y > 255) return; if (! tool->cursor_layout) { tool->cursor_layout = gtk_widget_create_pango_layout (tool->graph, "x:888 y:888"); pango_layout_get_pixel_extents (tool->cursor_layout, NULL, &tool->cursor_rect); } x = RADIUS * 2 + 2; y = RADIUS * 2 + 2; w = tool->cursor_rect.width + 4; h = tool->cursor_rect.height + 4; gdk_draw_rectangle (tool->graph->window, tool->graph->style->base_gc[GTK_STATE_ACTIVE], TRUE, x, y, w + 1, h + 1); gdk_draw_rectangle (tool->graph->window, tool->graph->style->text_gc[GTK_STATE_NORMAL], FALSE, x, y, w, h); g_snprintf (buf, sizeof (buf), "x:%3d y:%3d", tool->cursor_x, 255 - tool->cursor_y); pango_layout_set_text (tool->cursor_layout, buf, 11); gdk_draw_layout (tool->graph->window, tool->graph->style->text_gc[GTK_STATE_ACTIVE], x + 2, y + 2, tool->cursor_layout); } static gboolean curves_graph_expose (GtkWidget *widget, GdkEventExpose *eevent, GimpCurvesTool *tool) { GimpHistogramChannel channel; gint width; gint height; gint x, y, i; GdkPoint points[256]; GdkGC *graph_gc; width = widget->allocation.width - 2 * RADIUS; height = widget->allocation.height - 2 * RADIUS; if (width < 1 || height < 1) return FALSE; if (tool->color) { channel = tool->channel; } else { /* FIXME: hack */ if (tool->channel == 1) channel = GIMP_HISTOGRAM_ALPHA; else channel = GIMP_HISTOGRAM_VALUE; } /* Draw the grid lines */ for (i = 1; i < 4; i++) { gdk_draw_line (widget->window, tool->graph->style->dark_gc[GTK_STATE_NORMAL], RADIUS, RADIUS + i * (height / 4), RADIUS + width - 1, RADIUS + i * (height / 4)); gdk_draw_line (widget->window, tool->graph->style->dark_gc[GTK_STATE_NORMAL], RADIUS + i * (width / 4), RADIUS, RADIUS + i * (width / 4), RADIUS + height - 1); } /* Draw the curve */ graph_gc = tool->graph->style->text_gc[GTK_STATE_NORMAL]; for (i = 0; i < 256; i++) { x = i; y = 255 - tool->curves->curve[tool->channel][x]; points[i].x = RADIUS + ROUND ((gdouble) width * x / 256.0); points[i].y = RADIUS + ROUND ((gdouble) height * y / 256.0); } gdk_draw_lines (widget->window, graph_gc, points, 256); if (tool->curves->curve_type[tool->channel] == GIMP_CURVE_SMOOTH) { /* Draw the points */ for (i = 0; i < 17; i++) { x = tool->curves->points[tool->channel][i][0]; if (x < 0) continue; y = 255 - tool->curves->points[tool->channel][i][1]; gdk_draw_arc (widget->window, graph_gc, TRUE, ROUND ((gdouble) width * x / 256.0), ROUND ((gdouble) height * y / 256.0), RADIUS * 2, RADIUS * 2, 0, 23040); } } if (tool->col_value[channel] >= 0) { gchar buf[32]; /* draw the color line */ gdk_draw_line (widget->window, graph_gc, RADIUS + ROUND ((gdouble) width * (tool->col_value[channel]) / 256.0), RADIUS, RADIUS + ROUND ((gdouble) width * (tool->col_value[channel]) / 256.0), height + RADIUS - 1); /* and xpos indicator */ g_snprintf (buf, sizeof (buf), "x:%d", tool->col_value[channel]); if (! tool->xpos_layout) tool->xpos_layout = gtk_widget_create_pango_layout (tool->graph, buf); else pango_layout_set_text (tool->xpos_layout, buf, -1); pango_layout_get_pixel_size (tool->xpos_layout, &x, &y); if ((tool->col_value[channel] + RADIUS) < 127) x = RADIUS + 4; else x = -(x + 2); gdk_draw_layout (widget->window, graph_gc, RADIUS + ROUND (((gdouble) width * (tool->col_value[channel])) / 256.0 + x), height - y - 2, tool->xpos_layout); } curve_print_loc (tool); return FALSE; }