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mutter/src/iconcache.c
Elijah Newren 32d4bd6b63 Patch from Kjartan Maraas to fix a lot of tiny issues (unused variable 
2006-01-20  Elijah Newren  <newren gmail com>

	* src/async-getprop.c:
	* src/common.h:
	* src/display.c:
	* src/eggaccelerators.c:
	* src/frames.c:
	* src/gradient.c:
	* src/iconcache.c:
	* src/keybindings.c:
	* src/metaaccellabel.c:
	* src/place.c:
	* src/prefs.c:
	* src/preview-widget.c:
	* src/screen.c:
	* src/session.c:
	* src/stack.c:
	* src/tabpopup.c:
	* src/theme-viewer.c:
	* src/theme.c:
	* src/window-props.c:
	* src/window.c:
	* src/workspace.c:
	* src/tools/metacity-window-demo.c:
	* src/wm-tester/test-gravity.c:
	* src/wm-tester/test-resizing.c:
	* src/wm-tester/test-size-hints.c:
	Patch from Kjartan Maraas to fix a lot of tiny issues (unused
	variable removal, making unused variables used again, correction
	of types passed/declared for printf arguments, removal of unneeded
	breaks and returns, dead code removal, dead code revival, renaming
	to prevent shadowed variables, declaring unexported functions as
	static) spotted by the intel compiler.  #321439
2006-01-20 22:03:56 +00:00

857 lines
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/* Metacity window icons */
/*
* Copyright (C) 2002 Havoc Pennington
*
* 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 "iconcache.h"
#include "ui.h"
#include "errors.h"
#include <X11/Xatom.h>
/* The icon-reading code is also in libwnck, please sync bugfixes */
static void
get_fallback_icons (MetaScreen *screen,
GdkPixbuf **iconp,
int ideal_width,
int ideal_height,
GdkPixbuf **mini_iconp,
int ideal_mini_width,
int ideal_mini_height)
{
/* we don't scale, should be fixed if we ever un-hardcode the icon
* size
*/
*iconp = meta_ui_get_default_window_icon (screen->ui);
*mini_iconp = meta_ui_get_default_mini_icon (screen->ui);
}
static gboolean
find_largest_sizes (gulong *data,
gulong nitems,
int *width,
int *height)
{
*width = 0;
*height = 0;
while (nitems > 0)
{
int w, h;
if (nitems < 3)
return FALSE; /* no space for w, h */
w = data[0];
h = data[1];
if (nitems < ((gulong)(w * h) + 2))
return FALSE; /* not enough data */
*width = MAX (w, *width);
*height = MAX (h, *height);
data += (w * h) + 2;
nitems -= (w * h) + 2;
}
return TRUE;
}
static gboolean
find_best_size (gulong *data,
gulong nitems,
int ideal_width,
int ideal_height,
int *width,
int *height,
gulong **start)
{
int best_w;
int best_h;
gulong *best_start;
int max_width, max_height;
*width = 0;
*height = 0;
*start = NULL;
if (!find_largest_sizes (data, nitems, &max_width, &max_height))
return FALSE;
if (ideal_width < 0)
ideal_width = max_width;
if (ideal_height < 0)
ideal_height = max_height;
best_w = 0;
best_h = 0;
best_start = NULL;
while (nitems > 0)
{
int w, h;
gboolean replace;
replace = FALSE;
if (nitems < 3)
return FALSE; /* no space for w, h */
w = data[0];
h = data[1];
if (nitems < ((gulong)(w * h) + 2))
break; /* not enough data */
if (best_start == NULL)
{
replace = TRUE;
}
else
{
/* work with averages */
const int ideal_size = (ideal_width + ideal_height) / 2;
int best_size = (best_w + best_h) / 2;
int this_size = (w + h) / 2;
/* larger than desired is always better than smaller */
if (best_size < ideal_size &&
this_size >= ideal_size)
replace = TRUE;
/* if we have too small, pick anything bigger */
else if (best_size < ideal_size &&
this_size > best_size)
replace = TRUE;
/* if we have too large, pick anything smaller
* but still >= the ideal
*/
else if (best_size > ideal_size &&
this_size >= ideal_size &&
this_size < best_size)
replace = TRUE;
}
if (replace)
{
best_start = data + 2;
best_w = w;
best_h = h;
}
data += (w * h) + 2;
nitems -= (w * h) + 2;
}
if (best_start)
{
*start = best_start;
*width = best_w;
*height = best_h;
return TRUE;
}
else
return FALSE;
}
static void
argbdata_to_pixdata (gulong *argb_data, int len, guchar **pixdata)
{
guchar *p;
int i;
*pixdata = g_new (guchar, len * 4);
p = *pixdata;
/* One could speed this up a lot. */
i = 0;
while (i < len)
{
guint argb;
guint rgba;
argb = argb_data[i];
rgba = (argb << 8) | (argb >> 24);
*p = rgba >> 24;
++p;
*p = (rgba >> 16) & 0xff;
++p;
*p = (rgba >> 8) & 0xff;
++p;
*p = rgba & 0xff;
++p;
++i;
}
}
static gboolean
read_rgb_icon (MetaDisplay *display,
Window xwindow,
int ideal_width,
int ideal_height,
int ideal_mini_width,
int ideal_mini_height,
int *width,
int *height,
guchar **pixdata,
int *mini_width,
int *mini_height,
guchar **mini_pixdata)
{
Atom type;
int format;
gulong nitems;
gulong bytes_after;
int result, err;
gulong *data;
gulong *best;
int w, h;
gulong *best_mini;
int mini_w, mini_h;
meta_error_trap_push_with_return (display);
type = None;
data = NULL;
result = XGetWindowProperty (display->xdisplay,
xwindow,
display->atom_net_wm_icon,
0, G_MAXLONG,
False, XA_CARDINAL, &type, &format, &nitems,
&bytes_after, ((guchar **)&data));
err = meta_error_trap_pop_with_return (display, TRUE);
if (err != Success ||
result != Success)
return FALSE;
if (type != XA_CARDINAL)
{
XFree (data);
return FALSE;
}
if (!find_best_size (data, nitems,
ideal_width, ideal_height,
&w, &h, &best))
{
XFree (data);
return FALSE;
}
if (!find_best_size (data, nitems,
ideal_mini_width, ideal_mini_height,
&mini_w, &mini_h, &best_mini))
{
XFree (data);
return FALSE;
}
*width = w;
*height = h;
*mini_width = mini_w;
*mini_height = mini_h;
argbdata_to_pixdata (best, w * h, pixdata);
argbdata_to_pixdata (best_mini, mini_w * mini_h, mini_pixdata);
XFree (data);
return TRUE;
}
static void
free_pixels (guchar *pixels, gpointer data)
{
g_free (pixels);
}
static void
get_pixmap_geometry (MetaDisplay *display,
Pixmap pixmap,
int *w,
int *h,
int *d)
{
Window root_ignored;
int x_ignored, y_ignored;
guint width, height;
guint border_width_ignored;
guint depth;
if (w)
*w = 1;
if (h)
*h = 1;
if (d)
*d = 1;
XGetGeometry (display->xdisplay,
pixmap, &root_ignored, &x_ignored, &y_ignored,
&width, &height, &border_width_ignored, &depth);
if (w)
*w = width;
if (h)
*h = height;
if (d)
*d = depth;
}
static GdkPixbuf*
apply_mask (GdkPixbuf *pixbuf,
GdkPixbuf *mask)
{
int w, h;
int i, j;
GdkPixbuf *with_alpha;
guchar *src;
guchar *dest;
int src_stride;
int dest_stride;
w = MIN (gdk_pixbuf_get_width (mask), gdk_pixbuf_get_width (pixbuf));
h = MIN (gdk_pixbuf_get_height (mask), gdk_pixbuf_get_height (pixbuf));
with_alpha = gdk_pixbuf_add_alpha (pixbuf, FALSE, 0, 0, 0);
dest = gdk_pixbuf_get_pixels (with_alpha);
src = gdk_pixbuf_get_pixels (mask);
dest_stride = gdk_pixbuf_get_rowstride (with_alpha);
src_stride = gdk_pixbuf_get_rowstride (mask);
i = 0;
while (i < h)
{
j = 0;
while (j < w)
{
guchar *s = src + i * src_stride + j * 3;
guchar *d = dest + i * dest_stride + j * 4;
/* s[0] == s[1] == s[2], they are 255 if the bit was set, 0
* otherwise
*/
if (s[0] == 0)
d[3] = 0; /* transparent */
else
d[3] = 255; /* opaque */
++j;
}
++i;
}
return with_alpha;
}
static gboolean
try_pixmap_and_mask (MetaDisplay *display,
Pixmap src_pixmap,
Pixmap src_mask,
GdkPixbuf **iconp,
int ideal_width,
int ideal_height,
GdkPixbuf **mini_iconp,
int ideal_mini_width,
int ideal_mini_height)
{
GdkPixbuf *unscaled = NULL;
GdkPixbuf *mask = NULL;
int w, h;
if (src_pixmap == None)
return FALSE;
meta_error_trap_push (display);
get_pixmap_geometry (display, src_pixmap, &w, &h, NULL);
unscaled = meta_gdk_pixbuf_get_from_pixmap (NULL,
src_pixmap,
0, 0, 0, 0,
w, h);
if (unscaled && src_mask != None)
{
get_pixmap_geometry (display, src_mask, &w, &h, NULL);
mask = meta_gdk_pixbuf_get_from_pixmap (NULL,
src_mask,
0, 0, 0, 0,
w, h);
}
meta_error_trap_pop (display, FALSE);
if (mask)
{
GdkPixbuf *masked;
masked = apply_mask (unscaled, mask);
g_object_unref (G_OBJECT (unscaled));
unscaled = masked;
g_object_unref (G_OBJECT (mask));
mask = NULL;
}
if (unscaled)
{
*iconp =
gdk_pixbuf_scale_simple (unscaled,
ideal_width > 0 ? ideal_width :
gdk_pixbuf_get_width (unscaled),
ideal_height > 0 ? ideal_height :
gdk_pixbuf_get_height (unscaled),
GDK_INTERP_BILINEAR);
*mini_iconp =
gdk_pixbuf_scale_simple (unscaled,
ideal_mini_width > 0 ? ideal_mini_width :
gdk_pixbuf_get_width (unscaled),
ideal_mini_height > 0 ? ideal_mini_height :
gdk_pixbuf_get_height (unscaled),
GDK_INTERP_BILINEAR);
g_object_unref (G_OBJECT (unscaled));
if (*iconp && *mini_iconp)
return TRUE;
else
{
if (*iconp)
g_object_unref (G_OBJECT (*iconp));
if (*mini_iconp)
g_object_unref (G_OBJECT (*mini_iconp));
return FALSE;
}
}
else
return FALSE;
}
static void
get_kwm_win_icon (MetaDisplay *display,
Window xwindow,
Pixmap *pixmap,
Pixmap *mask)
{
Atom type;
int format;
gulong nitems;
gulong bytes_after;
Pixmap *icons;
int err, result;
*pixmap = None;
*mask = None;
meta_error_trap_push_with_return (display);
icons = NULL;
result = XGetWindowProperty (display->xdisplay, xwindow,
display->atom_kwm_win_icon,
0, G_MAXLONG,
False,
display->atom_kwm_win_icon,
&type, &format, &nitems,
&bytes_after, (guchar **)&icons);
err = meta_error_trap_pop_with_return (display, TRUE);
if (err != Success ||
result != Success)
return;
if (type != display->atom_kwm_win_icon)
{
XFree (icons);
return;
}
*pixmap = icons[0];
*mask = icons[1];
XFree (icons);
return;
}
typedef enum
{
/* These MUST be in ascending order of preference;
* i.e. if we get _NET_WM_ICON and already have
* WM_HINTS, we prefer _NET_WM_ICON
*/
USING_NO_ICON,
USING_FALLBACK_ICON,
USING_KWM_WIN_ICON,
USING_WM_HINTS,
USING_NET_WM_ICON
} IconOrigin;
void
meta_icon_cache_init (MetaIconCache *icon_cache)
{
g_return_if_fail (icon_cache != NULL);
icon_cache->origin = USING_NO_ICON;
icon_cache->prev_pixmap = None;
icon_cache->prev_mask = None;
#if 0
icon_cache->icon = NULL;
icon_cache->mini_icon = NULL;
icon_cache->ideal_width = -1; /* won't be a legit width */
icon_cache->ideal_height = -1;
icon_cache->ideal_mini_width = -1;
icon_cache->ideal_mini_height = -1;
#endif
icon_cache->want_fallback = TRUE;
icon_cache->wm_hints_dirty = TRUE;
icon_cache->kwm_win_icon_dirty = TRUE;
icon_cache->net_wm_icon_dirty = TRUE;
}
static void
clear_icon_cache (MetaIconCache *icon_cache,
gboolean dirty_all)
{
#if 0
if (icon_cache->icon)
g_object_unref (G_OBJECT (icon_cache->icon));
icon_cache->icon = NULL;
if (icon_cache->mini_icon)
g_object_unref (G_OBJECT (icon_cache->mini_icon));
icon_cache->mini_icon = NULL;
#endif
icon_cache->origin = USING_NO_ICON;
if (dirty_all)
{
icon_cache->wm_hints_dirty = TRUE;
icon_cache->kwm_win_icon_dirty = TRUE;
icon_cache->net_wm_icon_dirty = TRUE;
}
}
void
meta_icon_cache_free (MetaIconCache *icon_cache)
{
clear_icon_cache (icon_cache, FALSE);
}
void
meta_icon_cache_property_changed (MetaIconCache *icon_cache,
MetaDisplay *display,
Atom atom)
{
if (atom == display->atom_net_wm_icon)
icon_cache->net_wm_icon_dirty = TRUE;
else if (atom == display->atom_kwm_win_icon)
icon_cache->kwm_win_icon_dirty = TRUE;
else if (atom == XA_WM_HINTS)
icon_cache->wm_hints_dirty = TRUE;
}
gboolean
meta_icon_cache_get_icon_invalidated (MetaIconCache *icon_cache)
{
if (icon_cache->origin <= USING_KWM_WIN_ICON &&
icon_cache->kwm_win_icon_dirty)
return TRUE;
else if (icon_cache->origin <= USING_WM_HINTS &&
icon_cache->wm_hints_dirty)
return TRUE;
else if (icon_cache->origin <= USING_NET_WM_ICON &&
icon_cache->net_wm_icon_dirty)
return TRUE;
else if (icon_cache->origin < USING_FALLBACK_ICON &&
icon_cache->want_fallback)
return TRUE;
else if (icon_cache->origin == USING_NO_ICON)
return TRUE;
else if (icon_cache->origin == USING_FALLBACK_ICON &&
!icon_cache->want_fallback)
return TRUE;
else
return FALSE;
}
static void
replace_cache (MetaIconCache *icon_cache,
IconOrigin origin,
GdkPixbuf *new_icon,
GdkPixbuf *new_mini_icon)
{
clear_icon_cache (icon_cache, FALSE);
icon_cache->origin = origin;
#if 0
if (new_icon)
g_object_ref (G_OBJECT (new_icon));
icon_cache->icon = new_icon;
if (new_mini_icon)
g_object_ref (G_OBJECT (new_mini_icon));
icon_cache->mini_icon = new_mini_icon;
#endif
}
static GdkPixbuf*
scaled_from_pixdata (guchar *pixdata,
int w,
int h,
int new_w,
int new_h)
{
GdkPixbuf *src;
GdkPixbuf *dest;
src = gdk_pixbuf_new_from_data (pixdata,
GDK_COLORSPACE_RGB,
TRUE,
8,
w, h, w * 4,
free_pixels,
NULL);
if (src == NULL)
return NULL;
if (w != h)
{
GdkPixbuf *tmp;
int size;
size = MAX (w, h);
tmp = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, size, size);
if (tmp)
{
gdk_pixbuf_fill (tmp, 0);
gdk_pixbuf_copy_area (src, 0, 0, w, h,
tmp,
(size - w) / 2, (size - h) / 2);
g_object_unref (src);
src = tmp;
}
}
if (w != new_w || h != new_h)
{
dest = gdk_pixbuf_scale_simple (src, new_w, new_h, GDK_INTERP_BILINEAR);
g_object_unref (G_OBJECT (src));
}
else
{
dest = src;
}
return dest;
}
gboolean
meta_read_icons (MetaScreen *screen,
Window xwindow,
MetaIconCache *icon_cache,
Pixmap wm_hints_pixmap,
Pixmap wm_hints_mask,
GdkPixbuf **iconp,
int ideal_width,
int ideal_height,
GdkPixbuf **mini_iconp,
int ideal_mini_width,
int ideal_mini_height)
{
guchar *pixdata;
int w, h;
guchar *mini_pixdata;
int mini_w, mini_h;
Pixmap pixmap;
Pixmap mask;
/* Return value is whether the icon changed */
g_return_val_if_fail (icon_cache != NULL, FALSE);
*iconp = NULL;
*mini_iconp = NULL;
#if 0
if (ideal_width != icon_cache->ideal_width ||
ideal_height != icon_cache->ideal_height ||
ideal_mini_width != icon_cache->ideal_mini_width ||
ideal_mini_height != icon_cache->ideal_mini_height)
clear_icon_cache (icon_cache, TRUE);
icon_cache->ideal_width = ideal_width;
icon_cache->ideal_height = ideal_height;
icon_cache->ideal_mini_width = ideal_mini_width;
icon_cache->ideal_mini_height = ideal_mini_height;
#endif
if (!meta_icon_cache_get_icon_invalidated (icon_cache))
return FALSE; /* we have no new info to use */
pixdata = NULL;
/* Our algorithm here assumes that we can't have for example origin
* < USING_NET_WM_ICON and icon_cache->net_wm_icon_dirty == FALSE
* unless we have tried to read NET_WM_ICON.
*
* Put another way, if an icon origin is not dirty, then we have
* tried to read it at the current size. If it is dirty, then
* we haven't done that since the last change.
*/
if (icon_cache->origin <= USING_NET_WM_ICON &&
icon_cache->net_wm_icon_dirty)
{
icon_cache->net_wm_icon_dirty = FALSE;
if (read_rgb_icon (screen->display, xwindow,
ideal_width, ideal_height,
ideal_mini_width, ideal_mini_height,
&w, &h, &pixdata,
&mini_w, &mini_h, &mini_pixdata))
{
*iconp = scaled_from_pixdata (pixdata, w, h,
ideal_width, ideal_height);
*mini_iconp = scaled_from_pixdata (mini_pixdata, mini_w, mini_h,
ideal_mini_width, ideal_mini_height);
if (*iconp && *mini_iconp)
{
replace_cache (icon_cache, USING_NET_WM_ICON,
*iconp, *mini_iconp);
return TRUE;
}
else
{
if (*iconp)
g_object_unref (G_OBJECT (*iconp));
if (*mini_iconp)
g_object_unref (G_OBJECT (*mini_iconp));
}
}
}
if (icon_cache->origin <= USING_WM_HINTS &&
icon_cache->wm_hints_dirty)
{
icon_cache->wm_hints_dirty = FALSE;
pixmap = wm_hints_pixmap;
mask = wm_hints_mask;
/* We won't update if pixmap is unchanged;
* avoids a get_from_drawable() on every geometry
* hints change
*/
if ((pixmap != icon_cache->prev_pixmap ||
mask != icon_cache->prev_mask) &&
pixmap != None)
{
if (try_pixmap_and_mask (screen->display,
pixmap, mask,
iconp, ideal_width, ideal_height,
mini_iconp, ideal_mini_width, ideal_mini_height))
{
icon_cache->prev_pixmap = pixmap;
icon_cache->prev_mask = mask;
replace_cache (icon_cache, USING_WM_HINTS,
*iconp, *mini_iconp);
return TRUE;
}
}
}
if (icon_cache->origin <= USING_KWM_WIN_ICON &&
icon_cache->kwm_win_icon_dirty)
{
icon_cache->kwm_win_icon_dirty = FALSE;
get_kwm_win_icon (screen->display, xwindow, &pixmap, &mask);
if ((pixmap != icon_cache->prev_pixmap ||
mask != icon_cache->prev_mask) &&
pixmap != None)
{
if (try_pixmap_and_mask (screen->display, pixmap, mask,
iconp, ideal_width, ideal_height,
mini_iconp, ideal_mini_width, ideal_mini_height))
{
icon_cache->prev_pixmap = pixmap;
icon_cache->prev_mask = mask;
replace_cache (icon_cache, USING_KWM_WIN_ICON,
*iconp, *mini_iconp);
return TRUE;
}
}
}
if (icon_cache->want_fallback &&
icon_cache->origin < USING_FALLBACK_ICON)
{
get_fallback_icons (screen,
iconp,
ideal_width,
ideal_height,
mini_iconp,
ideal_mini_width,
ideal_mini_height);
replace_cache (icon_cache, USING_FALLBACK_ICON,
*iconp, *mini_iconp);
return TRUE;
}
if (!icon_cache->want_fallback &&
icon_cache->origin == USING_FALLBACK_ICON)
{
/* Get rid of current icon */
clear_icon_cache (icon_cache, FALSE);
return TRUE;
}
/* found nothing new */
return FALSE;
}
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