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gimp/app/color_area.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "appenv.h"
#include "color_area.h"
#include "color_notebook.h"
#include "gdisplay.h"
#include "gdisplay_color.h"
#include "gimpcontext.h"
#include "gimpdnd.h"
typedef enum
{
FORE_AREA,
BACK_AREA,
SWAP_AREA,
DEF_AREA,
INVALID_AREA
} ColorAreaTarget;
/* local function prototypes */
static void color_area_drop_color (GtkWidget *widget,
guchar r,
guchar g,
guchar b,
gpointer data);
static void color_area_drag_color (GtkWidget *widget,
guchar *r,
guchar *g,
guchar *b,
gpointer data);
static void color_area_color_changed (GimpContext *context,
gint r,
gint g,
gint b,
gpointer data);
/* Global variables */
gint active_color = FOREGROUND;
GDisplay *color_area_gdisp = NULL;
/* Static variables */
static GdkGC *color_area_gc = NULL;
static GdkGC *mask_gc = NULL;
static GtkWidget *color_area = NULL;
static GdkPixmap *color_area_pixmap = NULL;
static GdkBitmap *color_area_mask = NULL;
static GdkPixmap *default_pixmap = NULL;
static GdkBitmap *default_mask = NULL;
static GdkPixmap *swap_pixmap = NULL;
static GdkBitmap *swap_mask = NULL;
static ColorNotebook *color_notebook = NULL;
static gboolean color_notebook_active = FALSE;
static gint edit_color;
static guchar revert_fg_r, revert_fg_g, revert_fg_b;
static guchar revert_bg_r, revert_bg_g, revert_bg_b;
/* dnd stuff */
static GtkTargetEntry color_area_target_table[] =
{
GIMP_TARGET_COLOR
};
static guint n_color_area_targets = (sizeof (color_area_target_table) /
sizeof (color_area_target_table[0]));
/* Local functions */
static ColorAreaTarget
color_area_target (gint x,
gint y)
{
gint rect_w, rect_h;
gint width, height;
gdk_window_get_size (color_area_pixmap, &width, &height);
rect_w = width * 0.65;
rect_h = height * 0.65;
/* foreground active */
if (x > 0 && x < rect_w &&
y > 0 && y < rect_h)
return FORE_AREA;
else if (x > (width - rect_w) && x < width &&
y > (height - rect_h) && y < height)
return BACK_AREA;
else if (x > 0 && x < (width - rect_w) &&
y > rect_h && y < height)
return DEF_AREA;
else if (x > rect_w && x < width &&
y > 0 && y < (height - rect_h))
return SWAP_AREA;
else
return -1;
}
void
color_area_draw_rect (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
guchar r,
guchar g,
guchar b)
{
static guchar *color_area_rgb_buf = NULL;
static gint color_area_rgb_buf_size;
static gint rowstride;
gint xx, yy;
guchar *bp;
GList *list;
rowstride = 3 * ((width + 3) & -4);
if (color_area_rgb_buf == NULL ||
color_area_rgb_buf_size < height * rowstride)
{
if (color_area_rgb_buf)
g_free (color_area_rgb_buf);
color_area_rgb_buf = g_malloc (color_area_rgb_buf_size = rowstride * height);
}
bp = color_area_rgb_buf;
for (xx = 0; xx < width; xx++)
{
*bp++ = r;
*bp++ = g;
*bp++ = b;
}
bp = color_area_rgb_buf;
for (list = color_area_gdisp->cd_list; list; list = g_list_next (list))
{
ColorDisplayNode *node = (ColorDisplayNode *) list->data;
node->cd_convert (node->cd_ID, bp, width, 1, 3, rowstride);
}
for (yy = 1; yy < height; yy++)
{
bp += rowstride;
memcpy (bp, color_area_rgb_buf, rowstride);
}
gdk_draw_rgb_image (drawable, gc, x, y, width, height,
GDK_RGB_DITHER_MAX,
color_area_rgb_buf,
rowstride);
}
static void
color_area_draw (void)
{
gint rect_w, rect_h;
gint width, height;
gint def_width, def_height;
gint swap_width, swap_height;
guchar r, g, b;
GdkColor mask_pattern;
/* Check we haven't gotten initial expose yet,
* no point in drawing anything
*/
if (!color_area_pixmap || !color_area_gc)
return;
gdk_window_get_size (color_area_pixmap, &width, &height);
rect_w = width * 0.65;
rect_h = height * 0.65;
/* initialize the mask to transparent */
mask_pattern.pixel = 0;
gdk_gc_set_foreground (mask_gc, &mask_pattern);
gdk_draw_rectangle (color_area_mask, mask_gc, TRUE, 0, 0, -1, -1);
/* set the mask's gc to opaque */
mask_pattern.pixel = 1;
gdk_gc_set_foreground (mask_gc, &mask_pattern);
/* draw the background area */
gimp_context_get_background (gimp_context_get_user (), &r, &g, &b);
color_area_draw_rect (color_area_pixmap, color_area_gc,
(width - rect_w), (height - rect_h), rect_w, rect_h,
r, g, b);
gdk_draw_rectangle (color_area_mask, mask_gc, TRUE,
(width - rect_w), (height - rect_h), rect_w, rect_h);
if (active_color == FOREGROUND)
gtk_draw_shadow (color_area->style, color_area_pixmap,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
(width - rect_w), (height - rect_h), rect_w, rect_h);
else
gtk_draw_shadow (color_area->style, color_area_pixmap,
GTK_STATE_NORMAL, GTK_SHADOW_IN,
(width - rect_w), (height - rect_h), rect_w, rect_h);
/* draw the foreground area */
gimp_context_get_foreground (gimp_context_get_user (), &r, &g, &b);
color_area_draw_rect (color_area_pixmap, color_area_gc,
0, 0, rect_w, rect_h,
r, g, b);
gdk_draw_rectangle (color_area_mask, mask_gc, TRUE,
0, 0, rect_w, rect_h);
if (active_color == FOREGROUND)
gtk_draw_shadow (color_area->style, color_area_pixmap,
GTK_STATE_NORMAL, GTK_SHADOW_IN,
0, 0, rect_w, rect_h);
else
gtk_draw_shadow (color_area->style, color_area_pixmap,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
0, 0, rect_w, rect_h);
/* draw the default pixmap */
gdk_window_get_size (default_pixmap, &def_width, &def_height);
gdk_draw_pixmap (color_area_pixmap, color_area_gc, default_pixmap,
0, 0, 0, height - def_height, def_width, def_height);
gdk_draw_pixmap (color_area_mask, mask_gc, default_mask,
0, 0, 0, height - def_height, def_width, def_height);
/* draw the swap pixmap */
gdk_window_get_size (swap_pixmap, &swap_width, &swap_height);
gdk_draw_pixmap (color_area_pixmap, color_area_gc, swap_pixmap,
0, 0, width - swap_width, 0, swap_width, swap_height);
gdk_draw_pixmap (color_area_mask, mask_gc, swap_mask,
0, 0, width - swap_width, 0, swap_width, swap_height);
/* draw the widget */
gdk_gc_set_clip_mask (color_area_gc, color_area_mask);
gdk_gc_set_clip_origin (color_area_gc, 0, 0);
gdk_draw_pixmap (color_area->window, color_area_gc, color_area_pixmap,
0, 0, 0, 0, width, height);
/* reset the clip mask */
gdk_gc_set_clip_mask (color_area_gc, NULL);
}
static void
color_area_select_callback (gint r,
gint g,
gint b,
ColorNotebookState state,
void *client_data)
{
if (color_notebook)
{
switch (state)
{
case COLOR_NOTEBOOK_OK:
color_notebook_hide (color_notebook);
color_notebook_active = FALSE;
/* Fallthrough */
case COLOR_NOTEBOOK_UPDATE:
if (edit_color == FOREGROUND)
gimp_context_set_foreground (gimp_context_get_user (), r, g, b);
else
gimp_context_set_background (gimp_context_get_user (), r, g, b);
break;
case COLOR_NOTEBOOK_CANCEL:
color_notebook_hide (color_notebook);
color_notebook_active = FALSE;
gimp_context_set_foreground (gimp_context_get_user (),
revert_fg_r, revert_fg_g, revert_fg_b);
gimp_context_set_background (gimp_context_get_user (),
revert_bg_r, revert_bg_g, revert_bg_b);
}
}
}
static void
color_area_edit (void)
{
GimpContext *user_context;
guchar r, g, b;
user_context = gimp_context_get_user ();
if (!color_notebook_active)
{
gimp_context_get_foreground (user_context,
&revert_fg_r, &revert_fg_g, &revert_fg_b);
gimp_context_get_background (user_context,
&revert_bg_r, &revert_bg_g, &revert_bg_b);
}
if (active_color == FOREGROUND)
gimp_context_get_foreground (user_context, &r, &g, &b);
else
gimp_context_get_background (user_context, &r, &g, &b);
edit_color = active_color;
if (! color_notebook)
{
color_notebook = color_notebook_new (r, g, b, color_area_select_callback,
NULL, TRUE);
color_notebook_active = TRUE;
}
else
{
if (! color_notebook_active)
{
color_notebook_show (color_notebook);
color_notebook_active = TRUE;
}
else
gdk_window_raise (color_notebook->shell->window);
color_notebook_set_color (color_notebook, r, g, b, TRUE);
}
}
static gint
color_area_events (GtkWidget *widget,
GdkEvent *event)
{
GdkEventButton *bevent;
ColorAreaTarget target;
static ColorAreaTarget press_target = INVALID_AREA;
switch (event->type)
{
case GDK_CONFIGURE:
if (color_area_pixmap)
{
gdk_pixmap_unref (color_area_pixmap);
gdk_bitmap_unref (color_area_mask);
}
color_area_pixmap = gdk_pixmap_new (widget->window,
widget->allocation.width,
widget->allocation.height, -1);
color_area_mask = gdk_pixmap_new (widget->window,
widget->allocation.width,
widget->allocation.height, 1);
break;
case GDK_EXPOSE:
if (GTK_WIDGET_DRAWABLE (widget))
{
if (!color_area_gc)
{
color_area_gc = gdk_gc_new (widget->window);
mask_gc = gdk_gc_new (color_area_mask);
}
color_area_draw ();
}
break;
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
target = color_area_target (bevent->x, bevent->y);
press_target = INVALID_AREA;
switch (target)
{
case FORE_AREA:
case BACK_AREA:
if (target != active_color)
{
active_color = target;
color_area_draw ();
}
else
{
press_target = target;
}
break;
case SWAP_AREA:
gimp_context_swap_colors (gimp_context_get_user ());
break;
case DEF_AREA:
gimp_context_set_default_colors (gimp_context_get_user ());
break;
default:
break;
}
}
break;
case GDK_BUTTON_RELEASE:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
target = color_area_target (bevent->x, bevent->y);
if (target == press_target)
{
switch (target)
{
case FORE_AREA:
case BACK_AREA:
color_area_edit ();
break;
default:
break;
}
}
press_target = INVALID_AREA;
}
break;
case GDK_LEAVE_NOTIFY:
press_target = INVALID_AREA;
break;
default:
break;
}
return FALSE;
}
static void
color_area_realize (GtkWidget *widget,
gpointer data)
{
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
}
GtkWidget *
color_area_create (gint width,
gint height,
GdkPixmap *default_pmap,
GdkBitmap *default_msk,
GdkPixmap *swap_pmap,
GdkBitmap *swap_msk)
{
color_area = gtk_drawing_area_new ();
gtk_drawing_area_size (GTK_DRAWING_AREA (color_area), width, height);
gtk_widget_set_events (color_area,
GDK_EXPOSURE_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK);
gtk_signal_connect (GTK_OBJECT (color_area), "event",
GTK_SIGNAL_FUNC (color_area_events),
NULL);
gtk_signal_connect (GTK_OBJECT (color_area), "realize",
GTK_SIGNAL_FUNC (color_area_realize),
NULL);
default_pixmap = default_pmap;
default_mask = default_msk;
swap_pixmap = swap_pmap;
swap_mask = swap_msk;
/* dnd stuff */
gtk_drag_source_set (color_area,
GDK_BUTTON1_MASK | GDK_BUTTON2_MASK,
color_area_target_table, n_color_area_targets,
GDK_ACTION_COPY | GDK_ACTION_MOVE);
gimp_dnd_color_source_set (color_area, color_area_drag_color, NULL);
gtk_drag_dest_set (color_area,
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
color_area_target_table, n_color_area_targets,
GDK_ACTION_COPY);
gimp_dnd_color_dest_set (color_area, color_area_drop_color, NULL);
gtk_signal_connect (GTK_OBJECT (gimp_context_get_user ()),
"foreground_changed",
GTK_SIGNAL_FUNC (color_area_color_changed),
color_area);
gtk_signal_connect (GTK_OBJECT (gimp_context_get_user ()),
"background_changed",
GTK_SIGNAL_FUNC (color_area_color_changed),
color_area);
/* display filter dummy gdisplay */
color_area_gdisp = g_new (GDisplay, 1);
color_area_gdisp->cd_list = NULL;
color_area_gdisp->cd_ui = NULL;
color_area_gdisp->gimage = g_new (GimpImage, 1);
color_area_gdisp->gimage->base_type = RGB;
return color_area;
}
static void
color_area_drag_color (GtkWidget *widget,
guchar *r,
guchar *g,
guchar *b,
gpointer data)
{
if (active_color == FOREGROUND)
gimp_context_get_foreground (gimp_context_get_user (), r, g, b);
else
gimp_context_get_background (gimp_context_get_user (), r, g, b);
}
static void
color_area_drop_color (GtkWidget *widget,
guchar r,
guchar g,
guchar b,
gpointer data)
{
if (color_notebook_active &&
active_color == edit_color)
{
color_notebook_set_color (color_notebook, r, g, b, TRUE);
}
else
{
if (active_color == FOREGROUND)
gimp_context_set_foreground (gimp_context_get_user (), r, g, b);
else
gimp_context_set_background (gimp_context_get_user (), r, g, b);
}
}
static void
color_area_color_changed (GimpContext *context,
gint r,
gint g,
gint b,
gpointer data)
{
color_area_draw ();
}
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