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f139360569
mutter/src/x11/iconcache.c
Jonas Ådahl 2f4a68c8c3 Clean up include macros mess 
The order and way include macros were structured was chaotic, with no
real common thread between files. Try to tidy up the mess with some
common scheme, to make things look less messy.
2018-11-06 17:17:36 +01:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* Mutter 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "x11/iconcache.h"
#include <cairo.h>
#include <cairo-xlib.h>
#include <cairo-xlib-xrender.h>
#include <X11/Xatom.h>
#include <X11/extensions/Xrender.h>
#include "meta/meta-x11-errors.h"
#include "x11/meta-x11-display-private.h"
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 cairo_surface_t *
argbdata_to_surface (gulong *argb_data, int w, int h)
{
cairo_surface_t *surface;
int y, x, stride;
uint32_t *data;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, w, h);
stride = cairo_image_surface_get_stride (surface) / sizeof (uint32_t);
data = (uint32_t *) cairo_image_surface_get_data (surface);
/* One could speed this up a lot. */
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
uint32_t *p = &data[y * stride + x];
gulong *d = &argb_data[y * w + x];
*p = *d;
}
}
cairo_surface_mark_dirty (surface);
return surface;
}
static gboolean
read_rgb_icon (MetaX11Display *x11_display,
Window xwindow,
int ideal_width,
int ideal_height,
int ideal_mini_width,
int ideal_mini_height,
cairo_surface_t **icon,
cairo_surface_t **mini_icon)
{
Atom type;
int format;
gulong nitems;
gulong bytes_after;
int result, err;
guchar *data;
gulong *best;
int w, h;
gulong *best_mini;
int mini_w, mini_h;
gulong *data_as_long;
meta_x11_error_trap_push (x11_display);
type = None;
data = NULL;
result = XGetWindowProperty (x11_display->xdisplay,
xwindow,
x11_display->atom__NET_WM_ICON,
0, G_MAXLONG,
False, XA_CARDINAL, &type, &format, &nitems,
&bytes_after, &data);
err = meta_x11_error_trap_pop_with_return (x11_display);
if (err != Success ||
result != Success)
return FALSE;
if (type != XA_CARDINAL)
{
XFree (data);
return FALSE;
}
data_as_long = (gulong *)data;
if (!find_best_size (data_as_long, nitems,
ideal_width, ideal_height,
&w, &h, &best))
{
XFree (data);
return FALSE;
}
if (!find_best_size (data_as_long, nitems,
ideal_mini_width, ideal_mini_height,
&mini_w, &mini_h, &best_mini))
{
XFree (data);
return FALSE;
}
*icon = argbdata_to_surface (best, w, h);
*mini_icon = argbdata_to_surface (best_mini, mini_w, mini_h);
XFree (data);
return TRUE;
}
static void
get_pixmap_geometry (MetaX11Display *x11_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 (x11_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 int
standard_pict_format_for_depth (int depth)
{
switch (depth)
{
case 1:
return PictStandardA1;
case 24:
return PictStandardRGB24;
case 32:
return PictStandardARGB32;
default:
g_assert_not_reached ();
}
}
static XRenderPictFormat *
pict_format_for_depth (Display *xdisplay, int depth)
{
return XRenderFindStandardFormat (xdisplay, standard_pict_format_for_depth (depth));
}
static cairo_surface_t *
surface_from_pixmap (Display *xdisplay, Pixmap xpixmap,
int width, int height)
{
Window root_return;
int x_ret, y_ret;
unsigned int w_ret, h_ret, bw_ret, depth_ret;
if (!XGetGeometry (xdisplay, xpixmap, &root_return,
&x_ret, &y_ret, &w_ret, &h_ret, &bw_ret, &depth_ret))
return NULL;
return cairo_xlib_surface_create_with_xrender_format (xdisplay, xpixmap, DefaultScreenOfDisplay (xdisplay),
pict_format_for_depth (xdisplay, depth_ret), w_ret, h_ret);
}
static gboolean
try_pixmap_and_mask (MetaX11Display *x11_display,
Pixmap src_pixmap,
Pixmap src_mask,
cairo_surface_t **iconp)
{
Display *xdisplay = x11_display->xdisplay;
cairo_surface_t *icon, *mask = NULL;
int w, h, d;
if (src_pixmap == None)
return FALSE;
meta_x11_error_trap_push (x11_display);
get_pixmap_geometry (x11_display, src_pixmap, &w, &h, &d);
icon = surface_from_pixmap (xdisplay, src_pixmap, w, h);
if (icon && src_mask != None)
{
get_pixmap_geometry (x11_display, src_mask, &w, &h, &d);
if (d == 1)
mask = surface_from_pixmap (xdisplay, src_mask, w, h);
}
meta_x11_error_trap_pop (x11_display);
if (icon && mask)
{
cairo_surface_t *masked;
cairo_t *cr;
masked = cairo_surface_create_similar_image (icon,
CAIRO_FORMAT_ARGB32,
cairo_xlib_surface_get_width (icon),
cairo_xlib_surface_get_height (icon));
cr = cairo_create (masked);
cairo_set_source_surface (cr, icon, 0, 0);
cairo_mask_surface (cr, mask, 0, 0);
cairo_destroy (cr);
cairo_surface_destroy (icon);
cairo_surface_destroy (mask);
icon = masked;
}
if (icon)
{
*iconp = icon;
return TRUE;
}
else
{
return FALSE;
}
}
static void
get_kwm_win_icon (MetaX11Display *x11_display,
Window xwindow,
Pixmap *pixmap,
Pixmap *mask)
{
Atom type;
int format;
gulong nitems;
gulong bytes_after;
guchar *data;
Pixmap *icons;
int err, result;
*pixmap = None;
*mask = None;
meta_x11_error_trap_push (x11_display);
icons = NULL;
result = XGetWindowProperty (x11_display->xdisplay, xwindow,
x11_display->atom__KWM_WIN_ICON,
0, G_MAXLONG,
False,
x11_display->atom__KWM_WIN_ICON,
&type, &format, &nitems,
&bytes_after, &data);
icons = (Pixmap *)data;
err = meta_x11_error_trap_pop_with_return (x11_display);
if (err != Success ||
result != Success)
return;
if (type != x11_display->atom__KWM_WIN_ICON)
{
XFree (icons);
return;
}
*pixmap = icons[0];
*mask = icons[1];
XFree (icons);
return;
}
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;
icon_cache->wm_hints_dirty = TRUE;
icon_cache->kwm_win_icon_dirty = TRUE;
icon_cache->net_wm_icon_dirty = TRUE;
}
void
meta_icon_cache_property_changed (MetaIconCache *icon_cache,
MetaX11Display *x11_display,
Atom atom)
{
if (atom == x11_display->atom__NET_WM_ICON)
icon_cache->net_wm_icon_dirty = TRUE;
else if (atom == x11_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)
return TRUE;
else
return FALSE;
}
gboolean
meta_read_icons (MetaX11Display *x11_display,
Window xwindow,
MetaIconCache *icon_cache,
Pixmap wm_hints_pixmap,
Pixmap wm_hints_mask,
cairo_surface_t **iconp,
int ideal_width,
int ideal_height,
cairo_surface_t **mini_iconp,
int ideal_mini_width,
int ideal_mini_height)
{
/* Return value is whether the icon changed */
g_return_val_if_fail (icon_cache != NULL, FALSE);
*iconp = NULL;
*mini_iconp = NULL;
if (!meta_icon_cache_get_icon_invalidated (icon_cache))
return FALSE; /* we have no new info to use */
/* 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 (x11_display, xwindow,
ideal_width, ideal_height,
ideal_mini_width, ideal_mini_height,
iconp, mini_iconp))
{
icon_cache->origin = USING_NET_WM_ICON;
return TRUE;
}
}
if (icon_cache->origin <= USING_WM_HINTS &&
icon_cache->wm_hints_dirty)
{
Pixmap pixmap;
Pixmap mask;
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 (x11_display, pixmap, mask, iconp))
{
*mini_iconp = cairo_surface_reference (*iconp);
icon_cache->prev_pixmap = pixmap;
icon_cache->prev_mask = mask;
icon_cache->origin = USING_WM_HINTS;
return TRUE;
}
}
}
if (icon_cache->origin <= USING_KWM_WIN_ICON &&
icon_cache->kwm_win_icon_dirty)
{
Pixmap pixmap;
Pixmap mask;
icon_cache->kwm_win_icon_dirty = FALSE;
get_kwm_win_icon (x11_display, xwindow, &pixmap, &mask);
if ((pixmap != icon_cache->prev_pixmap ||
mask != icon_cache->prev_mask) &&
pixmap != None)
{
if (try_pixmap_and_mask (x11_display, pixmap, mask, iconp))
{
*mini_iconp = cairo_surface_reference (*iconp);
icon_cache->prev_pixmap = pixmap;
icon_cache->prev_mask = mask;
icon_cache->origin = USING_KWM_WIN_ICON;
return TRUE;
}
}
}
if (icon_cache->origin < USING_FALLBACK_ICON)
{
icon_cache->origin = USING_FALLBACK_ICON;
*iconp = NULL;
*mini_iconp = NULL;
return TRUE;
}
/* found nothing new */
return FALSE;
}
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