/* 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 "appenv.h" #include "cursorutil.h" #include "drawable.h" #include "gdisplay.h" #include "gimphistogram.h" #include "gimpui.h" #include "curves.h" #include "gimplut.h" #include "libgimp/gimpenv.h" #include "libgimp/gimpmath.h" #include "libgimp/gimpintl.h" #define GRAPH 0x1 #define XRANGE_TOP 0x2 #define XRANGE_BOTTOM 0x4 #define YRANGE 0x8 #define DRAW 0x10 #define ALL 0xFF /* NB: take care when changing these values: make sure the curve[] array in * curves.h is large enough. */ #define GRAPH_WIDTH 256 #define GRAPH_HEIGHT 256 #define XRANGE_WIDTH 256 #define XRANGE_HEIGHT 16 #define YRANGE_WIDTH 16 #define YRANGE_HEIGHT 256 #define RADIUS 3 #define MIN_DISTANCE 8 #define RANGE_MASK GDK_EXPOSURE_MASK | \ GDK_ENTER_NOTIFY_MASK #define GRAPH_MASK GDK_EXPOSURE_MASK | \ GDK_POINTER_MOTION_MASK | \ GDK_POINTER_MOTION_HINT_MASK | \ GDK_ENTER_NOTIFY_MASK | \ GDK_BUTTON_PRESS_MASK | \ GDK_BUTTON_RELEASE_MASK | \ GDK_BUTTON1_MOTION_MASK /* the curves structures */ typedef struct _Curves Curves; struct _Curves { gint x, y; /* coords for last mouse click */ }; typedef gdouble CRMatrix[4][4]; /* the curves tool options */ static ToolOptions * curves_options = NULL; /* the curves dialog */ static CurvesDialog * curves_dialog = NULL; /* the curves file dialog */ static GtkWidget *file_dlg = NULL; static gboolean load_save; static GtkWidget *channel_items[5]; static CRMatrix CR_basis = { { -0.5, 1.5, -1.5, 0.5 }, { 1.0, -2.5, 2.0, -0.5 }, { -0.5, 0.0, 0.5, 0.0 }, { 0.0, 1.0, 0.0, 0.0 }, }; /* curves action functions */ static void curves_button_press (Tool *, GdkEventButton *, gpointer); static void curves_button_release (Tool *, GdkEventButton *, gpointer); static void curves_motion (Tool *, GdkEventMotion *, gpointer); static void curves_control (Tool *, ToolAction, gpointer); static CurvesDialog * curves_dialog_new (void); static void curves_update (CurvesDialog *, int); static void curves_plot_curve (CurvesDialog *, int, int, int, int); static void curves_preview (CurvesDialog *); static void curves_channel_callback (GtkWidget *, gpointer); static void curves_smooth_callback (GtkWidget *, gpointer); static void curves_free_callback (GtkWidget *, gpointer); static void curves_reset_callback (GtkWidget *, gpointer); static void curves_ok_callback (GtkWidget *, gpointer); static void curves_cancel_callback (GtkWidget *, gpointer); static void curves_load_callback (GtkWidget *, gpointer); static void curves_save_callback (GtkWidget *, gpointer); static void curves_preview_update (GtkWidget *, gpointer); static gint curves_xrange_events (GtkWidget *, GdkEvent *, CurvesDialog *); static gint curves_yrange_events (GtkWidget *, GdkEvent *, CurvesDialog *); static gint curves_graph_events (GtkWidget *, GdkEvent *, CurvesDialog *); static void curves_CR_compose (CRMatrix, CRMatrix, CRMatrix); static void file_dialog_create (GtkWidget *); static void file_dialog_ok_callback (GtkWidget *, gpointer); static void file_dialog_cancel_callback (GtkWidget *, gpointer); static gboolean curves_read_from_file (FILE *f); static void curves_write_to_file (FILE *f); /* curves machinery */ float curves_lut_func (CurvesDialog *cd, gint nchannels, gint channel, gfloat value) { float f; int index; double inten; int j; if (nchannels == 1) j = 0; else j = channel + 1; inten = value; /* For color images this runs through the loop with j = channel +1 the first time and j = 0 the second time */ /* For bw images this runs through the loop with j = 0 the first and only time */ for (; j >= 0; j -= (channel + 1)) { /* don't apply the overall curve to the alpha channel */ if (j == 0 && (nchannels == 2 || nchannels == 4) && channel == nchannels -1) return inten; if (inten < 0.0) inten = cd->curve[j][0]/255.0; else if (inten >= 1.0) inten = cd->curve[j][255]/255.0; else /* interpolate the curve */ { index = floor(inten * 255.0); f = inten*255.0 - index; inten = ((1.0 - f) * cd->curve[j][index ] + ( f) * cd->curve[j][index + 1] ) / 255.0; } } return inten; } static void curves_colour_update (Tool *tool, GDisplay *gdisp, GimpDrawable *drawable, gint x, gint y) { unsigned char *color; int offx, offy; int has_alpha; int is_indexed; int sample_type; int maxval; if(!tool || tool->state != ACTIVE) return; drawable_offsets (drawable, &offx, &offy); x -= offx; y -= offy; if (!(color = image_map_get_color_at(curves_dialog->image_map, x, y))) return; sample_type = gimp_drawable_type (drawable); is_indexed = gimp_drawable_is_indexed (drawable); has_alpha = TYPE_HAS_ALPHA (sample_type); curves_dialog->col_value[HISTOGRAM_RED] = color[RED_PIX]; curves_dialog->col_value[HISTOGRAM_GREEN] = color[GREEN_PIX]; curves_dialog->col_value[HISTOGRAM_BLUE] = color[BLUE_PIX]; if (has_alpha) { curves_dialog->col_value [HISTOGRAM_ALPHA] = color[3]; } if (is_indexed) curves_dialog->col_value [HISTOGRAM_ALPHA] = color[4]; maxval = MAX (color[RED_PIX], color[GREEN_PIX]); curves_dialog->col_value[HISTOGRAM_VALUE] = MAX (maxval, color[BLUE_PIX]); g_free (color); } static void curves_add_point (GimpDrawable *drawable, gint x, gint y, gint cchan) { /* Add point onto the curve */ int closest_point = 0; int distance; int curvex; int i; switch (curves_dialog->curve_type[cchan]) { case SMOOTH: curvex = curves_dialog->col_value[cchan]; distance = G_MAXINT; for (i = 0; i < 17; i++) { if (curves_dialog->points[cchan][i][0] != -1) if (abs (curvex - curves_dialog->points[cchan][i][0]) < distance) { distance = abs (curvex - curves_dialog->points[cchan][i][0]); closest_point = i; } } if (distance > MIN_DISTANCE) closest_point = (curvex + 8) / 16; curves_dialog->points[cchan][closest_point][0] = curvex; curves_dialog->points[cchan][closest_point][1] = curves_dialog->curve[cchan][curvex]; break; case GFREE: curves_dialog->curve[cchan][x] = 255 - y; break; } } /* curves action functions */ static void curves_button_press (Tool *tool, GdkEventButton *bevent, gpointer gdisp_ptr) { GDisplay *gdisp; gint x, y; GimpDrawable * drawable; gdisp = gdisp_ptr; drawable = gimage_active_drawable (gdisp->gimage); tool->gdisp_ptr = gdisp; if (drawable != tool->drawable) { active_tool->preserve = TRUE; image_map_abort (curves_dialog->image_map); active_tool->preserve = FALSE; tool->drawable = drawable; curves_dialog->drawable = drawable; curves_dialog->color = drawable_color (drawable); curves_dialog->image_map = image_map_create (gdisp, drawable); } tool->state = ACTIVE; gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, FALSE, FALSE); curves_colour_update (tool, gdisp, drawable, x, y); curves_update (curves_dialog, GRAPH | DRAW); } static void curves_button_release (Tool *tool, GdkEventButton *bevent, gpointer gdisp_ptr) { gint x, y; GimpDrawable * drawable; GDisplay *gdisp; gdisp = (GDisplay *) gdisp_ptr; if(!curves_dialog || !gdisp || !(drawable = gimage_active_drawable (gdisp->gimage))) return; gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, FALSE, FALSE); curves_colour_update (tool, gdisp, drawable, x, y); if (bevent->state & GDK_SHIFT_MASK) { curves_add_point (drawable, x, y, curves_dialog->channel); curves_calculate_curve (curves_dialog); } else if (bevent->state & GDK_CONTROL_MASK) { curves_add_point (drawable, x, y, HISTOGRAM_VALUE); curves_add_point (drawable, x, y, HISTOGRAM_RED); curves_add_point (drawable, x, y, HISTOGRAM_GREEN); curves_add_point (drawable, x, y, HISTOGRAM_BLUE); curves_add_point (drawable, x, y, HISTOGRAM_ALPHA); curves_calculate_curve (curves_dialog); } curves_update (curves_dialog, GRAPH | DRAW); } static void curves_motion (Tool *tool, GdkEventMotion *mevent, gpointer gdisp_ptr) { GDisplay *gdisp; gint x, y; GimpDrawable * drawable; gdisp = (GDisplay *) gdisp_ptr; if(!curves_dialog || !gdisp || !(drawable = gimage_active_drawable (gdisp->gimage))) return; gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, FALSE, FALSE); curves_colour_update (tool, gdisp, drawable, x, y); curves_update (curves_dialog, GRAPH | DRAW); } static void curves_control (Tool *tool, ToolAction action, gpointer gdisp_ptr) { switch (action) { case PAUSE: break; case RESUME: break; case HALT: if (curves_dialog) curves_cancel_callback (NULL, (gpointer) curves_dialog); break; default: break; } } Tool * tools_new_curves (void) { Tool * tool; Curves * private; /* The tool options */ if (!curves_options) { curves_options = tool_options_new (_("Curves")); tools_register (CURVES, curves_options); } tool = tools_new_tool (CURVES); private = g_new (Curves, 1); tool->scroll_lock = TRUE; /* Disallow scrolling */ tool->preserve = FALSE; /* Don't preserve on drawable change */ tool->private = (void *) private; tool->button_press_func = curves_button_press; tool->button_release_func = curves_button_release; tool->motion_func = curves_motion; tool->control_func = curves_control; return tool; } void tools_free_curves (Tool *tool) { Curves * private; private = (Curves *) tool->private; /* Close the color select dialog */ if (curves_dialog) curves_cancel_callback (NULL, (gpointer) curves_dialog); g_free (private); } void curves_initialize (GDisplay *gdisp) { gint i, j; if (drawable_indexed (gimage_active_drawable (gdisp->gimage))) { g_message (_("Curves for indexed drawables cannot be adjusted.")); return; } /* The curves dialog */ if (!curves_dialog) curves_dialog = curves_dialog_new (); else if (!GTK_WIDGET_VISIBLE (curves_dialog->shell)) gtk_widget_show (curves_dialog->shell); /* Initialize the values */ curves_dialog->channel = HISTOGRAM_VALUE; for (i = 0; i < 5; i++) for (j = 0; j < 256; j++) curves_dialog->curve[i][j] = j; curves_dialog->grab_point = -1; for (i = 0; i < 5; i++) { for (j = 0; j < 17; j++) { curves_dialog->points[i][j][0] = -1; curves_dialog->points[i][j][1] = -1; } curves_dialog->points[i][0][0] = 0; curves_dialog->points[i][0][1] = 0; curves_dialog->points[i][16][0] = 255; curves_dialog->points[i][16][1] = 255; } curves_dialog->drawable = gimage_active_drawable (gdisp->gimage); curves_dialog->color = drawable_color (curves_dialog->drawable); curves_dialog->image_map = image_map_create (gdisp, curves_dialog->drawable); /* check for alpha channel */ if (drawable_has_alpha (curves_dialog->drawable)) gtk_widget_set_sensitive (channel_items[4], TRUE); else gtk_widget_set_sensitive (channel_items[4], FALSE); /* hide or show the channel menu based on image type */ if (curves_dialog->color) for (i = 0; i < 4; i++) gtk_widget_set_sensitive (channel_items[i], TRUE); else for (i = 1; i < 4; i++) gtk_widget_set_sensitive (channel_items[i], FALSE); /* set the current selection */ gtk_option_menu_set_history (GTK_OPTION_MENU (curves_dialog->channel_menu), curves_dialog->channel); if (!GTK_WIDGET_VISIBLE (curves_dialog->shell)) gtk_widget_show (curves_dialog->shell); curves_update (curves_dialog, GRAPH | DRAW); } void curves_free (void) { if (curves_dialog) { if (curves_dialog->image_map) { active_tool->preserve = TRUE; image_map_abort (curves_dialog->image_map); active_tool->preserve = FALSE; curves_dialog->image_map = NULL; } if (curves_dialog->pixmap) gdk_pixmap_unref (curves_dialog->pixmap); gtk_widget_destroy (curves_dialog->shell); } } /*******************/ /* Curves dialog */ /*******************/ static CurvesDialog * curves_dialog_new (void) { CurvesDialog *cd; GtkWidget *vbox; GtkWidget *hbox; GtkWidget *hbbox; GtkWidget *label; GtkWidget *frame; GtkWidget *toggle; GtkWidget *channel_hbox; GtkWidget *table; GtkWidget *button; gint i, j; cd = g_new (CurvesDialog, 1); cd->cursor_ind_height = -1; cd->cursor_ind_width = -1; cd->preview = TRUE; cd->pixmap = NULL; cd->channel = HISTOGRAM_VALUE; for (i = 0; i < 5; i++) cd->curve_type[i] = SMOOTH; for (i = 0; i < 5; i++) for (j = 0; j < 256; j++) cd->curve[i][j] = j; for (i = 0; i < (sizeof (cd->col_value) / sizeof (cd->col_value[0])); i++) cd->col_value[i] = 0; cd->lut = gimp_lut_new (); /* The shell and main vbox */ cd->shell = gimp_dialog_new (_("Curves"), "curves", tools_help_func, tool_info[CURVES].private_tip, GTK_WIN_POS_NONE, FALSE, TRUE, FALSE, _("OK"), curves_ok_callback, cd, NULL, NULL, TRUE, FALSE, _("Reset"), curves_reset_callback, cd, NULL, NULL, FALSE, FALSE, _("Cancel"), curves_cancel_callback, cd, NULL, NULL, FALSE, TRUE, NULL); vbox = gtk_vbox_new (FALSE, 4); gtk_container_set_border_width (GTK_CONTAINER (vbox), 4); gtk_container_add (GTK_CONTAINER (GTK_DIALOG (cd->shell)->vbox), vbox); /* The option menu for selecting channels */ channel_hbox = gtk_hbox_new (FALSE, 4); gtk_box_pack_start (GTK_BOX (vbox), channel_hbox, FALSE, FALSE, 0); label = gtk_label_new (_("Modify Curves for Channel:")); gtk_box_pack_start (GTK_BOX (channel_hbox), label, FALSE, FALSE, 0); cd->channel_menu = gimp_option_menu_new2 (FALSE, curves_channel_callback, cd, (gpointer) cd->channel, _("Value"), (gpointer) HISTOGRAM_VALUE, &channel_items[0], _("Red"), (gpointer) HISTOGRAM_RED, &channel_items[1], _("Green"), (gpointer) HISTOGRAM_GREEN, &channel_items[2], _("Blue"), (gpointer) HISTOGRAM_BLUE, &channel_items[3], _("Alpha"), (gpointer) HISTOGRAM_ALPHA, &channel_items[4], NULL); gtk_box_pack_start (GTK_BOX (channel_hbox), cd->channel_menu, FALSE, FALSE, 2); gtk_widget_show (label); gtk_widget_show (cd->channel_menu); gtk_widget_show (channel_hbox); /* The table for the yrange 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, FALSE, FALSE, 0); /* The range drawing area */ frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN); gtk_table_attach (GTK_TABLE (table), frame, 0, 1, 0, 1, GTK_EXPAND, GTK_EXPAND, 0, 0); cd->yrange = gtk_preview_new (GTK_PREVIEW_COLOR); gtk_preview_size (GTK_PREVIEW (cd->yrange), YRANGE_WIDTH, YRANGE_HEIGHT); gtk_widget_set_events (cd->yrange, RANGE_MASK); gtk_container_add (GTK_CONTAINER (frame), cd->yrange); gtk_signal_connect (GTK_OBJECT (cd->yrange), "event", GTK_SIGNAL_FUNC (curves_yrange_events), cd); gtk_widget_show (cd->yrange); gtk_widget_show (frame); /* The curves graph */ frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN); gtk_table_attach (GTK_TABLE (table), frame, 1, 2, 0, 1, GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0); cd->graph = gtk_drawing_area_new (); gtk_drawing_area_size (GTK_DRAWING_AREA (cd->graph), GRAPH_WIDTH + RADIUS * 2, GRAPH_HEIGHT + RADIUS * 2); gtk_widget_set_events (cd->graph, GRAPH_MASK); gtk_container_add (GTK_CONTAINER (frame), cd->graph); gtk_signal_connect (GTK_OBJECT (cd->graph), "event", GTK_SIGNAL_FUNC (curves_graph_events), cd); gtk_widget_show (cd->graph); gtk_widget_show (frame); /* The range drawing area */ frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN); gtk_table_attach (GTK_TABLE (table), frame, 1, 2, 1, 2, GTK_EXPAND, GTK_EXPAND, 0, 0); cd->xrange = gtk_preview_new (GTK_PREVIEW_COLOR); gtk_preview_size (GTK_PREVIEW (cd->xrange), XRANGE_WIDTH, XRANGE_HEIGHT); gtk_widget_set_events (cd->xrange, RANGE_MASK); gtk_container_add (GTK_CONTAINER (frame), cd->xrange); gtk_signal_connect (GTK_OBJECT (cd->xrange), "event", GTK_SIGNAL_FUNC (curves_xrange_events), cd); gtk_widget_show (cd->xrange); gtk_widget_show (frame); gtk_widget_show (table); /* Horizontal box for preview */ hbox = gtk_hbox_new (FALSE, 4); gtk_box_pack_end (GTK_BOX (vbox), hbox, FALSE, FALSE, 0); /* The option menu for selecting the drawing method */ label = gtk_label_new (_("Curve Type:")); gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0); gtk_widget_show (label); cd->curve_type_menu = gimp_option_menu_new (FALSE, _("Smooth"), curves_smooth_callback, cd, NULL, NULL, TRUE, _("Free"), curves_free_callback, cd, NULL, NULL, FALSE, NULL); gtk_box_pack_start (GTK_BOX (hbox), cd->curve_type_menu, FALSE, FALSE, 2); gtk_widget_show (cd->curve_type_menu); gtk_widget_show (hbox); /* The preview toggle */ toggle = gtk_check_button_new_with_label (_("Preview")); gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), cd->preview); gtk_box_pack_end (GTK_BOX (hbox), toggle, FALSE, FALSE, 0); gtk_signal_connect (GTK_OBJECT (toggle), "toggled", GTK_SIGNAL_FUNC (curves_preview_update), cd); gtk_widget_show (toggle); gtk_widget_show (hbox); /* Horizontal button box for load / save */ hbbox = gtk_hbutton_box_new (); gtk_button_box_set_spacing (GTK_BUTTON_BOX (hbbox), 4); gtk_button_box_set_layout (GTK_BUTTON_BOX (hbbox), GTK_BUTTONBOX_SPREAD); gtk_box_pack_end (GTK_BOX (vbox), hbbox, FALSE, FALSE, 0); button = gtk_button_new_with_label (_("Load")); GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT); gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0); gtk_signal_connect (GTK_OBJECT (button), "clicked", GTK_SIGNAL_FUNC (curves_load_callback), cd->shell); gtk_widget_show (button); button = gtk_button_new_with_label (_("Save")); GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT); gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0); gtk_signal_connect (GTK_OBJECT (button), "clicked", GTK_SIGNAL_FUNC (curves_save_callback), cd->shell); gtk_widget_show (button); gtk_widget_show (hbbox); gtk_widget_show (vbox); return cd; } static void curve_print_loc (CurvesDialog *cd, gint xpos, gint ypos) { char buf[32]; gint width; gint ascent; gint descent; if (cd->cursor_ind_width < 0) { /* Calc max extents */ gdk_string_extents (cd->graph->style->font, "x:888 y:888", NULL, NULL, &width, &ascent, &descent); cd->cursor_ind_width = width; cd->cursor_ind_height = ascent + descent; cd->cursor_ind_ascent = ascent; } if (xpos >= 0 && xpos <= 255 && ypos >=0 && ypos <= 255) { g_snprintf (buf, sizeof (buf), "x:%d y:%d",xpos,ypos); gdk_draw_rectangle (cd->graph->window, cd->graph->style->bg_gc[GTK_STATE_ACTIVE], TRUE, RADIUS*2 + 2 , RADIUS*2 + 2, cd->cursor_ind_width+4, cd->cursor_ind_height+5); gdk_draw_rectangle (cd->graph->window, cd->graph->style->black_gc, FALSE, RADIUS*2 + 2 , RADIUS*2 + 2, cd->cursor_ind_width+3, cd->cursor_ind_height+4); gdk_draw_string (cd->graph->window, cd->graph->style->font, cd->graph->style->black_gc, RADIUS*2 + 4, RADIUS*2 + 5 + cd->cursor_ind_ascent, buf); } } /* TODO: preview alpha channel stuff correctly. -- austin, 20/May/99 */ static void curves_update (CurvesDialog *cd, int update) { GdkRectangle area; gint i, j; gchar buf[32]; gint offset; if (update & XRANGE_TOP) { guchar buf[XRANGE_WIDTH * 3]; switch (cd->channel) { case HISTOGRAM_VALUE: case HISTOGRAM_ALPHA: for (i = 0; i < XRANGE_HEIGHT / 2; i++) { for (j = 0; j < XRANGE_WIDTH ; j++) { buf[j*3+0] = cd->curve[cd->channel][j]; buf[j*3+1] = cd->curve[cd->channel][j]; buf[j*3+2] = cd->curve[cd->channel][j]; } gtk_preview_draw_row (GTK_PREVIEW (cd->xrange), buf, 0, i, XRANGE_WIDTH); } break; case HISTOGRAM_RED: case HISTOGRAM_GREEN: case HISTOGRAM_BLUE: { for (i = 0; i < XRANGE_HEIGHT / 2; i++) { for (j = 0; j < XRANGE_WIDTH; j++) { buf[j*3+0] = cd->curve[HISTOGRAM_RED][j]; buf[j*3+1] = cd->curve[HISTOGRAM_GREEN][j]; buf[j*3+2] = cd->curve[HISTOGRAM_BLUE][j]; } gtk_preview_draw_row (GTK_PREVIEW (cd->xrange), buf, 0, i, XRANGE_WIDTH); } break; } default: g_warning ("unknown channel type %d, can't happen!?!?", cd->channel); break; } if (update & DRAW) { area.x = 0; area.y = 0; area.width = XRANGE_WIDTH; area.height = XRANGE_HEIGHT / 2; gtk_widget_draw (cd->xrange, &area); } } if (update & XRANGE_BOTTOM) { guchar buf[XRANGE_WIDTH * 3]; for (i = 0; i < XRANGE_WIDTH; i++) { buf[i*3+0] = i; buf[i*3+1] = i; buf[i*3+2] = i; } for (i = XRANGE_HEIGHT / 2; i < XRANGE_HEIGHT; i++) gtk_preview_draw_row (GTK_PREVIEW (cd->xrange), buf, 0, i, XRANGE_WIDTH); if (update & DRAW) { area.x = 0; area.y = XRANGE_HEIGHT / 2; area.width = XRANGE_WIDTH; area.height = XRANGE_HEIGHT / 2; gtk_widget_draw (cd->xrange, &area); } } if (update & YRANGE) { guchar buf[YRANGE_WIDTH * 3]; guchar pix[3]; for (i = 0; i < YRANGE_HEIGHT; i++) { switch (cd->channel) { case HISTOGRAM_VALUE: case HISTOGRAM_ALPHA: pix[0] = pix[1] = pix[2] = (255 - i); break; case HISTOGRAM_RED: case HISTOGRAM_GREEN: case HISTOGRAM_BLUE: pix[0] = pix[1] = pix[2] = 0; pix[cd->channel - 1] = (255 - i); break; default: g_warning ("unknown channel type %d, can't happen!?!?", cd->channel); break; } for (j = 0; j < YRANGE_WIDTH * 3; j++) buf[j] = pix[j%3]; gtk_preview_draw_row (GTK_PREVIEW (cd->yrange), buf, 0, i, YRANGE_WIDTH); } if (update & DRAW) gtk_widget_draw (cd->yrange, NULL); } if ((update & GRAPH) && (update & DRAW) && cd->pixmap != NULL) { GdkPoint points[256]; /* Clear the pixmap */ gdk_draw_rectangle (cd->pixmap, cd->graph->style->bg_gc[GTK_STATE_NORMAL], TRUE, 0, 0, GRAPH_WIDTH + RADIUS * 2, GRAPH_HEIGHT + RADIUS * 2); /* Draw the grid lines */ for (i = 0; i < 5; i++) { gdk_draw_line (cd->pixmap, cd->graph->style->dark_gc[GTK_STATE_NORMAL], RADIUS, i * (GRAPH_HEIGHT / 4) + RADIUS, GRAPH_WIDTH + RADIUS, i * (GRAPH_HEIGHT / 4) + RADIUS); gdk_draw_line (cd->pixmap, cd->graph->style->dark_gc[GTK_STATE_NORMAL], i * (GRAPH_WIDTH / 4) + RADIUS, RADIUS, i * (GRAPH_WIDTH / 4) + RADIUS, GRAPH_HEIGHT + RADIUS); } /* Draw the curve */ for (i = 0; i < 256; i++) { points[i].x = i + RADIUS; points[i].y = 255 - cd->curve[cd->channel][i] + RADIUS; } gdk_draw_points (cd->pixmap, cd->graph->style->black_gc, points, 256); /* Draw the points */ if (cd->curve_type[cd->channel] == SMOOTH) for (i = 0; i < 17; i++) { if (cd->points[cd->channel][i][0] != -1) gdk_draw_arc (cd->pixmap, cd->graph->style->black_gc, TRUE, cd->points[cd->channel][i][0], 255 - cd->points[cd->channel][i][1], RADIUS * 2, RADIUS * 2, 0, 23040); } /* draw the colour line */ gdk_draw_line (cd->pixmap, cd->graph->style->black_gc, cd->col_value[cd->channel]+RADIUS,RADIUS, cd->col_value[cd->channel]+RADIUS,GRAPH_HEIGHT + RADIUS); /* and xpos indicator */ g_snprintf (buf, sizeof (buf), "x:%d",cd->col_value[cd->channel]); if ((cd->col_value[cd->channel]+RADIUS) < 127) { offset = RADIUS + 4; } else { offset = - gdk_string_width (cd->graph->style->font,buf) - 2; } gdk_draw_string (cd->pixmap, cd->graph->style->font, cd->graph->style->black_gc, cd->col_value[cd->channel]+offset, GRAPH_HEIGHT, buf); gdk_draw_pixmap (cd->graph->window, cd->graph->style->black_gc, cd->pixmap, 0, 0, 0, 0, GRAPH_WIDTH + RADIUS * 2, GRAPH_HEIGHT + RADIUS * 2); } } static void curves_plot_curve (CurvesDialog *cd, gint p1, gint p2, gint p3, gint p4) { CRMatrix geometry; CRMatrix tmp1, tmp2; CRMatrix deltas; gdouble x, dx, dx2, dx3; gdouble y, dy, dy2, dy3; gdouble d, d2, d3; gint lastx, lasty; gint32 newx, newy; gint i; /* construct the geometry matrix from the segment */ for (i = 0; i < 4; i++) { geometry[i][2] = 0; geometry[i][3] = 0; } for (i = 0; i < 2; i++) { geometry[0][i] = cd->points[cd->channel][p1][i]; geometry[1][i] = cd->points[cd->channel][p2][i]; geometry[2][i] = cd->points[cd->channel][p3][i]; geometry[3][i] = cd->points[cd->channel][p4][i]; } /* subdivide the curve 1000 times */ /* n can be adjusted to give a finer or coarser curve */ d = 1.0 / 1000; d2 = d * d; d3 = d * d * d; /* construct a temporary matrix for determining the forward differencing deltas */ tmp2[0][0] = 0; tmp2[0][1] = 0; tmp2[0][2] = 0; tmp2[0][3] = 1; tmp2[1][0] = d3; tmp2[1][1] = d2; tmp2[1][2] = d; tmp2[1][3] = 0; tmp2[2][0] = 6*d3; tmp2[2][1] = 2*d2; tmp2[2][2] = 0; tmp2[2][3] = 0; tmp2[3][0] = 6*d3; tmp2[3][1] = 0; tmp2[3][2] = 0; tmp2[3][3] = 0; /* compose the basis and geometry matrices */ curves_CR_compose (CR_basis, geometry, tmp1); /* compose the above results to get the deltas matrix */ curves_CR_compose (tmp2, tmp1, deltas); /* extract the x deltas */ x = deltas[0][0]; dx = deltas[1][0]; dx2 = deltas[2][0]; dx3 = deltas[3][0]; /* extract the y deltas */ y = deltas[0][1]; dy = deltas[1][1]; dy2 = deltas[2][1]; dy3 = deltas[3][1]; lastx = CLAMP (x, 0, 255); lasty = CLAMP (y, 0, 255); cd->curve[cd->channel][lastx] = lasty; /* loop over the curve */ for (i = 0; i < 1000; i++) { /* increment the x values */ x += dx; dx += dx2; dx2 += dx3; /* increment the y values */ y += dy; dy += dy2; dy2 += dy3; newx = CLAMP0255 (ROUND (x)); newy = CLAMP0255 (ROUND (y)); /* if this point is different than the last one...then draw it */ if ((lastx != newx) || (lasty != newy)) cd->curve[cd->channel][newx] = newy; lastx = newx; lasty = newy; } } void curves_calculate_curve (CurvesDialog *cd) { gint i; gint points[17]; gint num_pts; gint p1, p2, p3, p4; switch (cd->curve_type[cd->channel]) { case GFREE: break; case SMOOTH: /* cycle through the curves */ num_pts = 0; for (i = 0; i < 17; i++) if (cd->points[cd->channel][i][0] != -1) points[num_pts++] = i; /* Initialize boundary curve points */ if (num_pts != 0) { for (i = 0; i < cd->points[cd->channel][points[0]][0]; i++) cd->curve[cd->channel][i] = cd->points[cd->channel][points[0]][1]; for (i = cd->points[cd->channel][points[num_pts - 1]][0]; i < 256; i++) cd->curve[cd->channel][i] = cd->points[cd->channel][points[num_pts - 1]][1]; } for (i = 0; i < num_pts - 1; i++) { p1 = (i == 0) ? points[i] : points[(i - 1)]; p2 = points[i]; p3 = points[(i + 1)]; p4 = (i == (num_pts - 2)) ? points[(num_pts - 1)] : points[(i + 2)]; curves_plot_curve (cd, p1, p2, p3, p4); } break; } gimp_lut_setup (cd->lut, (GimpLutFunc) curves_lut_func, (void *) cd, gimp_drawable_bytes (cd->drawable)); } static void curves_preview (CurvesDialog *cd) { if (!cd->image_map) { g_message ("curves_preview(): No image map"); return; } active_tool->preserve = TRUE; image_map_apply (cd->image_map, (ImageMapApplyFunc)gimp_lut_process_2, (void *) cd->lut); active_tool->preserve = FALSE; } static void curves_channel_callback (GtkWidget *widget, gpointer data) { CurvesDialog *cd; cd = (CurvesDialog *) data; gimp_menu_item_update (widget, &cd->channel); gtk_option_menu_set_history (GTK_OPTION_MENU (cd->curve_type_menu), cd->curve_type[cd->channel]); curves_update (cd, XRANGE_TOP | YRANGE | GRAPH | DRAW); } static void curves_smooth_callback (GtkWidget *widget, gpointer data) { CurvesDialog *cd; int i; gint32 index; cd = (CurvesDialog *) data; if (cd->curve_type[cd->channel] != SMOOTH) { cd->curve_type[cd->channel] = SMOOTH; /* pick representative points from the curve and make them control points */ for (i = 0; i <= 8; i++) { index = CLAMP0255 (i * 32); cd->points[cd->channel][i * 2][0] = index; cd->points[cd->channel][i * 2][1] = cd->curve[cd->channel][index]; } curves_calculate_curve (cd); curves_update (cd, GRAPH | DRAW); if (cd->preview) curves_preview (cd); } } static void curves_free_callback (GtkWidget *widget, gpointer data) { CurvesDialog *cd; cd = (CurvesDialog *) data; if (cd->curve_type[cd->channel] != GFREE) { cd->curve_type[cd->channel] = GFREE; curves_calculate_curve (cd); curves_update (cd, GRAPH | DRAW); if (cd->preview) curves_preview (cd); } } static void curves_reset_callback (GtkWidget *widget, gpointer data) { CurvesDialog *cd; int i; cd = (CurvesDialog *) data; /* Initialize the values */ for (i = 0; i < 256; i++) cd->curve[cd->channel][i] = i; cd->grab_point = -1; for (i = 0; i < 17; i++) { cd->points[cd->channel][i][0] = -1; cd->points[cd->channel][i][1] = -1; } cd->points[cd->channel][0][0] = 0; cd->points[cd->channel][0][1] = 0; cd->points[cd->channel][16][0] = 255; cd->points[cd->channel][16][1] = 255; curves_calculate_curve (cd); curves_update (cd, GRAPH | XRANGE_TOP | DRAW); if (cd->preview) curves_preview (cd); } static void curves_ok_callback (GtkWidget *widget, gpointer data) { CurvesDialog *cd; cd = (CurvesDialog *) data; gimp_dialog_hide (cd->shell); active_tool->preserve = TRUE; /* We're about to dirty... */ if (!cd->preview) image_map_apply (cd->image_map, (ImageMapApplyFunc)gimp_lut_process_2, (void *) cd->lut); if (cd->image_map) image_map_commit (cd->image_map); active_tool->preserve = FALSE; cd->image_map = NULL; active_tool->gdisp_ptr = NULL; active_tool->drawable = NULL; } static void curves_cancel_callback (GtkWidget *widget, gpointer data) { CurvesDialog *cd; cd = (CurvesDialog *) data; gimp_dialog_hide (cd->shell); if (cd->image_map) { active_tool->preserve = TRUE; image_map_abort (cd->image_map); active_tool->preserve = FALSE; gdisplays_flush (); cd->image_map = NULL; } active_tool->gdisp_ptr = NULL; active_tool->drawable = NULL; } static void curves_load_callback (GtkWidget *widget, gpointer data) { if (!file_dlg) file_dialog_create (GTK_WIDGET (data)); else if (GTK_WIDGET_VISIBLE (file_dlg)) return; load_save = TRUE; gtk_window_set_title (GTK_WINDOW (file_dlg), _("Load Curves")); gtk_widget_show (file_dlg); } static void curves_save_callback (GtkWidget *widget, gpointer data) { if (!file_dlg) file_dialog_create (GTK_WIDGET (data)); else if (GTK_WIDGET_VISIBLE (file_dlg)) return; load_save = FALSE; gtk_window_set_title (GTK_WINDOW (file_dlg), _("Save Curves")); gtk_widget_show (file_dlg); } static void curves_preview_update (GtkWidget *widget, gpointer data) { CurvesDialog *cd; cd = (CurvesDialog *) data; if (GTK_TOGGLE_BUTTON (widget)->active) { cd->preview = TRUE; curves_preview (cd); } else { cd->preview = FALSE; if (cd->image_map) { active_tool->preserve = TRUE; image_map_clear (cd->image_map); active_tool->preserve = FALSE; gdisplays_flush (); } } } static gint curves_graph_events (GtkWidget *widget, GdkEvent *event, CurvesDialog *cd) { static GdkCursorType cursor_type = GDK_TOP_LEFT_ARROW; GdkCursorType new_type; GdkEventButton *bevent; GdkEventMotion *mevent; int i; int tx, ty; int x, y; int closest_point; int distance; int x1, x2, y1, y2; new_type = GDK_X_CURSOR; closest_point = 0; /* get the pointer position */ gdk_window_get_pointer (cd->graph->window, &tx, &ty, NULL); x = CLAMP ((tx - RADIUS), 0, 255); y = CLAMP ((ty - RADIUS), 0, 255); distance = G_MAXINT; for (i = 0; i < 17; i++) { if (cd->points[cd->channel][i][0] != -1) if (abs (x - cd->points[cd->channel][i][0]) < distance) { distance = abs (x - cd->points[cd->channel][i][0]); closest_point = i; } } if (distance > MIN_DISTANCE) closest_point = (x + 8) / 16; switch (event->type) { case GDK_EXPOSE: if (cd->pixmap == NULL) cd->pixmap = gdk_pixmap_new (cd->graph->window, GRAPH_WIDTH + RADIUS * 2, GRAPH_HEIGHT + RADIUS * 2, -1); curves_update (cd, GRAPH | DRAW); break; case GDK_BUTTON_PRESS: bevent = (GdkEventButton *) event; new_type = GDK_TCROSS; switch (cd->curve_type[cd->channel]) { case SMOOTH: /* determine the leftmost and rightmost points */ cd->leftmost = -1; for (i = closest_point - 1; i >= 0; i--) if (cd->points[cd->channel][i][0] != -1) { cd->leftmost = cd->points[cd->channel][i][0]; break; } cd->rightmost = 256; for (i = closest_point + 1; i < 17; i++) if (cd->points[cd->channel][i][0] != -1) { cd->rightmost = cd->points[cd->channel][i][0]; break; } cd->grab_point = closest_point; cd->points[cd->channel][cd->grab_point][0] = x; cd->points[cd->channel][cd->grab_point][1] = 255 - y; break; case GFREE: cd->curve[cd->channel][x] = 255 - y; cd->grab_point = x; cd->last = y; break; } curves_calculate_curve (cd); curves_update (cd, GRAPH | XRANGE_TOP | DRAW); gtk_grab_add (widget); break; case GDK_BUTTON_RELEASE: new_type = GDK_FLEUR; cd->grab_point = -1; if (cd->preview) curves_preview (cd); gtk_grab_remove (widget); break; case GDK_MOTION_NOTIFY: mevent = (GdkEventMotion *) event; if (mevent->is_hint) { mevent->x = tx; mevent->y = ty; } switch (cd->curve_type[cd->channel]) { case SMOOTH: /* If no point is grabbed... */ if (cd->grab_point == -1) { if (cd->points[cd->channel][closest_point][0] != -1) new_type = GDK_FLEUR; else new_type = GDK_TCROSS; } /* Else, drag the grabbed point */ else { new_type = GDK_TCROSS; cd->points[cd->channel][cd->grab_point][0] = -1; if (x > cd->leftmost && x < cd->rightmost) { closest_point = (x + 8) / 16; if (cd->points[cd->channel][closest_point][0] == -1) cd->grab_point = closest_point; cd->points[cd->channel][cd->grab_point][0] = x; cd->points[cd->channel][cd->grab_point][1] = 255 - y; } curves_calculate_curve (cd); curves_update (cd, GRAPH | XRANGE_TOP | DRAW); } break; case GFREE: if (cd->grab_point != -1) { if (cd->grab_point > x) { x1 = x; x2 = cd->grab_point; y1 = y; y2 = cd->last; } else { x1 = cd->grab_point; x2 = x; y1 = cd->last; y2 = y; } if (x2 != x1) for (i = x1; i <= x2; i++) cd->curve[cd->channel][i] = 255 - (y1 + ((y2 - y1) * (i - x1)) / (x2 - x1)); else cd->curve[cd->channel][x] = 255 - y; cd->grab_point = x; cd->last = y; curves_update (cd, GRAPH | XRANGE_TOP | DRAW); } if (mevent->state & GDK_BUTTON1_MASK) new_type = GDK_TCROSS; else new_type = GDK_PENCIL; break; } if (new_type != cursor_type) { cursor_type = new_type; change_win_cursor (cd->graph->window, cursor_type); } curve_print_loc(cd,x,255-y); break; default: break; } return FALSE; } static gint curves_xrange_events (GtkWidget *widget, GdkEvent *event, CurvesDialog *cd) { switch (event->type) { case GDK_EXPOSE: curves_update (cd, XRANGE_TOP | XRANGE_BOTTOM); break; case GDK_DELETE: break; default: break; } return FALSE; } static gint curves_yrange_events (GtkWidget *widget, GdkEvent *event, CurvesDialog *cd) { switch (event->type) { case GDK_EXPOSE: curves_update (cd, YRANGE); break; default: break; } return FALSE; } static void curves_CR_compose (CRMatrix a, CRMatrix b, CRMatrix ab) { gint i, j; for (i = 0; i < 4; i++) { for (j = 0; j < 4; j++) { ab[i][j] = (a[i][0] * b[0][j] + a[i][1] * b[1][j] + a[i][2] * b[2][j] + a[i][3] * b[3][j]); } } } static void file_dialog_create (GtkWidget *parent) { gchar *temp; file_dlg = gtk_file_selection_new (_("Load/Save Curves")); gtk_window_set_wmclass (GTK_WINDOW (file_dlg), "load_save_curves", "Gimp"); gtk_window_set_position (GTK_WINDOW (file_dlg), GTK_WIN_POS_MOUSE); gtk_container_set_border_width (GTK_CONTAINER (file_dlg), 2); gtk_container_set_border_width (GTK_CONTAINER (GTK_FILE_SELECTION (file_dlg)->button_area), 2); gtk_signal_connect (GTK_OBJECT (GTK_FILE_SELECTION (file_dlg)->cancel_button), "clicked", GTK_SIGNAL_FUNC (file_dialog_cancel_callback), NULL); gtk_signal_connect (GTK_OBJECT (file_dlg), "delete_event", GTK_SIGNAL_FUNC (file_dialog_cancel_callback), NULL); gtk_signal_connect (GTK_OBJECT (GTK_FILE_SELECTION (file_dlg)->ok_button), "clicked", GTK_SIGNAL_FUNC (file_dialog_ok_callback), NULL); gtk_signal_connect (GTK_OBJECT (parent), "unmap", GTK_SIGNAL_FUNC (file_dialog_cancel_callback), NULL); temp = g_strdup_printf ("%s" G_DIR_SEPARATOR_S "curves" G_DIR_SEPARATOR_S, gimp_directory ()); gtk_file_selection_set_filename (GTK_FILE_SELECTION (file_dlg), temp); g_free (temp); gimp_help_connect_help_accel (file_dlg, tools_help_func, tool_info[CURVES].private_tip); } static void file_dialog_ok_callback (GtkWidget *widget, gpointer data) { FILE *f; gchar *filename; filename = gtk_file_selection_get_filename (GTK_FILE_SELECTION (file_dlg)); if (load_save) { f = fopen (filename, "rt"); if (!f) { g_message (_("Unable to open file %s"), filename); return; } if (!curves_read_from_file (f)) { g_message (("Error in reading file %s"), filename); return; } fclose (f); } else { f = fopen (filename, "wt"); if (!f) { g_message (_("Unable to open file %s"), filename); return; } curves_write_to_file (f); fclose (f); } file_dialog_cancel_callback (file_dlg, NULL); } static void file_dialog_cancel_callback (GtkWidget *widget, gpointer data) { gimp_dialog_hide (file_dlg); } static gboolean curves_read_from_file (FILE *f) { gint i, j, fields; gchar buf[50]; gint index[5][17]; gint value[5][17]; gint current_channel; if (!fgets (buf, 50, f)) 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 (f, "%d %d ", &index[i][j], &value[i][j]); if (fields != 2) { g_print ("fields != 2"); return FALSE; } } } for (i = 0; i < 5; i++) { curves_dialog->curve_type[i] = SMOOTH; for (j = 0; j < 17; j++) { curves_dialog->points[i][j][0] = index[i][j]; curves_dialog->points[i][j][1] = value[i][j]; } } /* this is ugly, but works ... */ current_channel = curves_dialog->channel; for (i = 0; i < 5; i++) { curves_dialog->channel = i; curves_calculate_curve (curves_dialog); } curves_dialog->channel = current_channel; curves_update (curves_dialog, ALL); gtk_option_menu_set_history (GTK_OPTION_MENU (curves_dialog->curve_type_menu), SMOOTH); if (curves_dialog->preview) curves_preview (curves_dialog); return TRUE; } static void curves_write_to_file (FILE *f) { int i, j; gint32 index; for (i = 0; i < 5; i++) if (curves_dialog->curve_type[i] == GFREE) { /* pick representative points from the curve and make them control points */ for (j = 0; j <= 8; j++) { index = CLAMP0255 (j * 32); curves_dialog->points[i][j * 2][0] = index; curves_dialog->points[i][j * 2][1] = curves_dialog->curve[i][index]; } } fprintf (f, "# GIMP Curves File\n"); for (i = 0; i < 5; i++) { for (j = 0; j < 17; j++) fprintf (f, "%d %d ", curves_dialog->points[i][j][0], curves_dialog->points[i][j][1]); fprintf (f, "\n"); } }