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gimp/app/core/gimpprojection.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "display-types.h"
#include "gui/gui-types.h" /* FIXME */
#include "core/gimp.h"
#include "core/gimpcontext.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "core/gimpimage-projection.h"
#include "tools/tools-types.h"
#include "tools/gimptool.h"
#include "tools/tool_manager.h"
#include "gui/info-window.h"
#include "gimpdisplay.h"
#include "gimpdisplay-area.h"
#include "gimpdisplay-handlers.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-handlers.h"
#include "gimprc.h"
#include "nav_window.h"
#include "libgimp/gimpintl.h"
/* local function prototypes */
static void gimp_display_class_init (GimpDisplayClass *klass);
static void gimp_display_init (GimpDisplay *gdisp);
static void gimp_display_finalize (GObject *object);
static void gimp_display_flush_whenever (GimpDisplay *gdisp,
gboolean now);
static void gimp_display_flush_whenever (GimpDisplay *gdisp,
gboolean now);
static void gimp_display_idlerender_init (GimpDisplay *gdisp);
static gboolean gimp_display_idlerender_callback (gpointer data);
static gboolean gimp_display_idle_render_next_area (GimpDisplay *gdisp);
static void gimp_display_paint_area (GimpDisplay *gdisp,
gint x,
gint y,
gint w,
gint h);
static GimpObjectClass *parent_class = NULL;
GSList *display_list = NULL;
static gint display_num = 1;
GType
gimp_display_get_type (void)
{
static GType display_type = 0;
if (! display_type)
{
static const GTypeInfo display_info =
{
sizeof (GimpDisplayClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_display_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpDisplay),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_display_init,
};
display_type = g_type_register_static (GIMP_TYPE_OBJECT,
"GimpDisplay",
&display_info, 0);
}
return display_type;
}
static void
gimp_display_class_init (GimpDisplayClass *klass)
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_display_finalize;
}
static void
gimp_display_init (GimpDisplay *gdisp)
{
gdisp->ID = display_num++;
gdisp->gimage = NULL;
gdisp->instance = 0;
gdisp->shell = NULL;
gdisp->scale = 0;
gdisp->dot_for_dot = gimprc.default_dot_for_dot;
gdisp->draw_guides = TRUE;
gdisp->snap_to_guides = TRUE;
gdisp->update_areas = NULL;
gdisp->idle_render.idle_id = 0;
gdisp->idle_render.update_areas = NULL;
}
static void
gimp_display_finalize (GObject *object)
{
GimpDisplay *gdisp;
g_return_if_fail (GIMP_IS_DISPLAY (object));
gdisp = GIMP_DISPLAY (object);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
GimpDisplay *
gimp_display_new (GimpImage *gimage,
guint scale)
{
GimpDisplay *gdisp;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
/* If there isn't an interface, never create a gdisplay */
if (gimage->gimp->no_interface)
return NULL;
/*
* Set all GimpDisplay parameters...
*/
gdisp = g_object_new (GIMP_TYPE_DISPLAY, NULL);
/* add the new display to the list so that it isn't lost */
display_list = g_slist_append (display_list, gdisp);
gimp_display_connect (gdisp, gimage);
gdisp->scale = scale;
/* create the shell for the image */
gdisp->shell = gimp_display_shell_new (gdisp);
gtk_widget_show (gdisp->shell);
return gdisp;
}
void
gimp_display_delete (GimpDisplay *gdisp)
{
GimpTool *active_tool;
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
/* remove the display from the list */
display_list = g_slist_remove (display_list, gdisp);
/* stop any active tool */
tool_manager_control_active (gdisp->gimage->gimp, HALT, gdisp);
active_tool = tool_manager_get_active (gdisp->gimage->gimp);
/* clear out the pointer to this gdisp from the active tool */
if (active_tool && active_tool->gdisp == gdisp)
{
active_tool->drawable = NULL;
active_tool->gdisp = NULL;
}
/* If this gdisplay was idlerendering at the time when it was deleted,
* deactivate the idlerendering thread before deletion!
*/
if (gdisp->idle_render.idle_id)
{
g_source_remove (gdisp->idle_render.idle_id);
gdisp->idle_render.idle_id = 0;
}
/* free the update area lists */
gimp_display_area_list_free (gdisp->update_areas);
gimp_display_area_list_free (gdisp->idle_render.update_areas);
if (gdisp->shell)
{
gtk_widget_destroy (gdisp->shell);
gdisp->shell = NULL;
}
/* free the gimage */
gimp_display_disconnect (gdisp);
g_object_unref (G_OBJECT (gdisp));
}
gint
gimp_display_get_ID (GimpDisplay *gdisp)
{
g_return_val_if_fail (GIMP_IS_DISPLAY (gdisp), -1);
return gdisp->ID;
}
GimpDisplay *
gimp_display_get_by_ID (Gimp *gimp,
gint ID)
{
GimpDisplay *gdisp;
GSList *list;
/* Traverse the list of displays, returning the one that matches the ID
* If no display in the list is a match, return NULL.
*/
for (list = display_list; list; list = g_slist_next (list))
{
gdisp = (GimpDisplay *) list->data;
if (gdisp->ID == ID)
return gdisp;
}
return NULL;
}
void
gimp_display_reconnect (GimpDisplay *gdisp,
GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
if (gdisp->idle_render.idle_id)
{
g_source_remove (gdisp->idle_render.idle_id);
gdisp->idle_render.idle_id = 0;
}
gimp_display_shell_disconnect (GIMP_DISPLAY_SHELL (gdisp->shell));
gimp_display_disconnect (gdisp);
gimp_display_connect (gdisp, gimage);
gimp_display_add_update_area (gdisp,
0, 0,
gdisp->gimage->width,
gdisp->gimage->height);
gimp_display_shell_reconnect (GIMP_DISPLAY_SHELL (gdisp->shell));
}
void
gimp_display_add_update_area (GimpDisplay *gdisp,
gint x,
gint y,
gint w,
gint h)
{
GimpArea *area;
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
area = gimp_area_new (CLAMP (x, 0, gdisp->gimage->width),
CLAMP (y, 0, gdisp->gimage->height),
CLAMP (x + w, 0, gdisp->gimage->width),
CLAMP (y + h, 0, gdisp->gimage->height));
gdisp->update_areas = gimp_display_area_list_process (gdisp->update_areas,
area);
}
void
gimp_display_flush (GimpDisplay *gdisp)
{
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
/* Redraw on idle time */
gimp_display_flush_whenever (gdisp, FALSE);
}
void
gimp_display_flush_now (GimpDisplay *gdisp)
{
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
/* Redraw NOW */
gimp_display_flush_whenever (gdisp, TRUE);
}
/* Force all gdisplays to finish their idlerender projection */
void
gimp_display_finish_draw (GimpDisplay *gdisp)
{
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
if (gdisp->idle_render.idle_id)
{
g_source_remove (gdisp->idle_render.idle_id);
gdisp->idle_render.idle_id = 0;
while (gimp_display_idlerender_callback (gdisp));
}
}
/* stuff that will go to GimpDisplayShell */
void
gdisplay_transform_coords (GimpDisplay *gdisp,
gint x,
gint y,
gint *nx,
gint *ny,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gdouble scalex;
gdouble scaley;
gint offset_x;
gint offset_y;
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
g_return_if_fail (nx != NULL);
g_return_if_fail (ny != NULL);
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
/* transform from image coordinates to screen coordinates */
scalex = SCALEFACTOR_X (gdisp);
scaley = SCALEFACTOR_Y (gdisp);
if (use_offsets)
{
gimp_drawable_offsets (gimp_image_active_drawable (gdisp->gimage),
&offset_x, &offset_y);
}
else
{
offset_x = offset_y = 0;
}
*nx = (gint) (scalex * (x + offset_x) - shell->offset_x);
*ny = (gint) (scaley * (y + offset_y) - shell->offset_y);
*nx += shell->disp_xoffset;
*ny += shell->disp_yoffset;
}
void
gdisplay_untransform_coords (GimpDisplay *gdisp,
gint x,
gint y,
gint *nx,
gint *ny,
gboolean round,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gdouble scalex;
gdouble scaley;
gint offset_x;
gint offset_y;
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
g_return_if_fail (nx != NULL);
g_return_if_fail (ny != NULL);
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
x -= shell->disp_xoffset;
y -= shell->disp_yoffset;
/* transform from screen coordinates to image coordinates */
scalex = SCALEFACTOR_X (gdisp);
scaley = SCALEFACTOR_Y (gdisp);
if (use_offsets)
{
gimp_drawable_offsets (gimp_image_active_drawable (gdisp->gimage),
&offset_x, &offset_y);
}
else
{
offset_x = offset_y = 0;
}
if (round)
{
*nx = ROUND ((x + shell->offset_x) / scalex - offset_x);
*ny = ROUND ((y + shell->offset_y) / scaley - offset_y);
}
else
{
*nx = (int) ((x + shell->offset_x) / scalex - offset_x);
*ny = (int) ((y + shell->offset_y) / scaley - offset_y);
}
}
void
gdisplay_transform_coords_f (GimpDisplay *gdisp,
gdouble x,
gdouble y,
gdouble *nx,
gdouble *ny,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gdouble scalex;
gdouble scaley;
gint offset_x;
gint offset_y;
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
g_return_if_fail (nx != NULL);
g_return_if_fail (ny != NULL);
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
/* transform from gimp coordinates to screen coordinates */
scalex = SCALEFACTOR_X (gdisp);
scaley = SCALEFACTOR_Y (gdisp);
if (use_offsets)
{
gimp_drawable_offsets (gimp_image_active_drawable (gdisp->gimage),
&offset_x, &offset_y);
}
else
{
offset_x = offset_y = 0;
}
*nx = scalex * (x + offset_x) - shell->offset_x;
*ny = scaley * (y + offset_y) - shell->offset_y;
*nx += shell->disp_xoffset;
*ny += shell->disp_yoffset;
}
void
gdisplay_untransform_coords_f (GimpDisplay *gdisp,
gdouble x,
gdouble y,
gdouble *nx,
gdouble *ny,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gdouble scalex;
gdouble scaley;
gint offset_x;
gint offset_y;
g_return_if_fail (GIMP_IS_DISPLAY (gdisp));
g_return_if_fail (nx != NULL);
g_return_if_fail (ny != NULL);
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
x -= shell->disp_xoffset;
y -= shell->disp_yoffset;
/* transform from screen coordinates to gimp coordinates */
scalex = SCALEFACTOR_X (gdisp);
scaley = SCALEFACTOR_Y (gdisp);
if (use_offsets)
{
gimp_drawable_offsets (gimp_image_active_drawable (gdisp->gimage),
&offset_x, &offset_y);
}
else
{
offset_x = offset_y = 0;
}
*nx = (x + shell->offset_x) / scalex - offset_x;
*ny = (y + shell->offset_y) / scaley - offset_y;
}
/* private functions */
static void
gimp_display_flush_whenever (GimpDisplay *gdisp,
gboolean now)
{
/* Flush the items in the displays and updates lists -
* but only if gdisplay has been mapped and exposed
*/
if (! GIMP_DISPLAY_SHELL (gdisp->shell)->select)
{
g_warning ("gimp_display_flush_whenever(): called unrealized");
return;
}
/* First the updates... */
if (now)
{
/* Synchronous */
GSList *list;
GimpArea *area;
for (list = gdisp->update_areas; list; list = g_slist_next (list))
{
/* Paint the area specified by the GimpArea */
area = (GimpArea *) list->data;
if ((area->x1 != area->x2) && (area->y1 != area->y2))
{
gimp_display_paint_area (gdisp,
area->x1,
area->y1,
(area->x2 - area->x1),
(area->y2 - area->y1));
}
}
}
else
{
/* Asynchronous */
if (gdisp->update_areas)
gimp_display_idlerender_init (gdisp);
}
/* Free the update lists */
gdisp->update_areas = gimp_display_area_list_free (gdisp->update_areas);
/* Next the displays... */
gimp_display_shell_flush (GIMP_DISPLAY_SHELL (gdisp->shell));
/* update the gdisplay's info dialog */
info_window_update (gdisp);
/* ensure the consistency of the tear-off menus */
if (! now && gimp_context_get_display (gimp_get_user_context
(gdisp->gimage->gimp)) == gdisp)
{
gimp_display_shell_set_menu_sensitivity (GIMP_DISPLAY_SHELL (gdisp->shell));
}
}
static void
gimp_display_idlerender_init (GimpDisplay *gdisp)
{
GSList *list;
GimpArea *area, *new_area;
/* We need to merge the IdleRender's and the GimpDisplay's update_areas list
* to keep track of which of the updates have been flushed and hence need
* to be drawn.
*/
for (list = gdisp->update_areas; list; list = g_slist_next (list))
{
area = (GimpArea *) list->data;
new_area = g_new (GimpArea, 1);
memcpy (new_area, area, sizeof (GimpArea));
gdisp->idle_render.update_areas =
gimp_display_area_list_process (gdisp->idle_render.update_areas,
new_area);
}
/* If an idlerender was already running, merge the remainder of its
* unrendered area with the update_areas list, and make it start work
* on the next unrendered area in the list.
*/
if (gdisp->idle_render.idle_id)
{
new_area =
gimp_area_new (gdisp->idle_render.basex,
gdisp->idle_render.y,
gdisp->idle_render.basex + gdisp->idle_render.width,
gdisp->idle_render.y + (gdisp->idle_render.height -
(gdisp->idle_render.y -
gdisp->idle_render.basey)));
gdisp->idle_render.update_areas =
gimp_display_area_list_process (gdisp->idle_render.update_areas,
new_area);
gimp_display_idle_render_next_area (gdisp);
}
else
{
if (gdisp->idle_render.update_areas == NULL)
{
g_warning ("Wanted to start idlerender thread with no update_areas. (+memleak)");
return;
}
gimp_display_idle_render_next_area (gdisp);
gdisp->idle_render.idle_id = g_idle_add_full (G_PRIORITY_LOW,
gimp_display_idlerender_callback,
gdisp,
NULL);
}
/* Caller frees gdisp->update_areas */
}
/* Unless specified otherwise, display re-rendering is organised by
* IdleRender, which amalgamates areas to be re-rendered and breaks
* them into bite-sized chunks which are chewed on in a low- priority
* idle thread. This greatly improves responsiveness for many GIMP
* operations. -- Adam
*/
static gboolean
gimp_display_idlerender_callback (gpointer data)
{
const gint CHUNK_WIDTH = 256;
const gint CHUNK_HEIGHT = 128;
gint workx, worky, workw, workh;
GimpDisplay *gdisp = data;
workw = CHUNK_WIDTH;
workh = CHUNK_HEIGHT;
workx = gdisp->idle_render.x;
worky = gdisp->idle_render.y;
if (workx + workw > gdisp->idle_render.basex + gdisp->idle_render.width)
{
workw = gdisp->idle_render.basex + gdisp->idle_render.width - workx;
}
if (worky + workh > gdisp->idle_render.basey + gdisp->idle_render.height)
{
workh = gdisp->idle_render.basey + gdisp->idle_render.height - worky;
}
gimp_display_paint_area (gdisp, workx, worky, workw, workh);
gimp_display_shell_flush (GIMP_DISPLAY_SHELL (gdisp->shell));
gdisp->idle_render.x += CHUNK_WIDTH;
if (gdisp->idle_render.x >=
gdisp->idle_render.basex + gdisp->idle_render.width)
{
gdisp->idle_render.x = gdisp->idle_render.basex;
gdisp->idle_render.y += CHUNK_HEIGHT;
if (gdisp->idle_render.y >=
gdisp->idle_render.basey + gdisp->idle_render.height)
{
if (! gimp_display_idle_render_next_area (gdisp))
{
/* FINISHED */
gdisp->idle_render.idle_id = 0;
return FALSE;
}
}
}
/* Still work to do. */
return TRUE;
}
static gboolean
gimp_display_idle_render_next_area (GimpDisplay *gdisp)
{
GimpArea *area;
if (! gdisp->idle_render.update_areas)
return FALSE;
area = (GimpArea *) gdisp->idle_render.update_areas->data;
gdisp->idle_render.update_areas =
g_slist_remove (gdisp->idle_render.update_areas, area);
gdisp->idle_render.x = gdisp->idle_render.basex = area->x1;
gdisp->idle_render.y = gdisp->idle_render.basey = area->y1;
gdisp->idle_render.width = area->x2 - area->x1;
gdisp->idle_render.height = area->y2 - area->y1;
g_free (area);
return TRUE;
}
static void
gimp_display_paint_area (GimpDisplay *gdisp,
gint x,
gint y,
gint w,
gint h)
{
GimpDisplayShell *shell;
gint x1, y1, x2, y2;
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
/* Bounds check */
x1 = CLAMP (x, 0, gdisp->gimage->width);
y1 = CLAMP (y, 0, gdisp->gimage->height);
x2 = CLAMP (x + w, 0, gdisp->gimage->width);
y2 = CLAMP (y + h, 0, gdisp->gimage->height);
x = x1;
y = y1;
w = (x2 - x1);
h = (y2 - y1);
/* calculate the extents of the update as limited by what's visible */
gdisplay_untransform_coords (gdisp,
0, 0,
&x1, &y1,
FALSE, FALSE);
gdisplay_untransform_coords (gdisp,
shell->disp_width, shell->disp_height,
&x2, &y2,
FALSE, FALSE);
gimp_image_invalidate (gdisp->gimage, x, y, w, h, x1, y1, x2, y2);
/* display the area */
gdisplay_transform_coords (gdisp, x, y, &x1, &y1, FALSE);
gdisplay_transform_coords (gdisp, x + w, y + h, &x2, &y2, FALSE);
gimp_display_shell_add_expose_area (shell,
x1, y1, (x2 - x1), (y2 - y1));
}
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