brl/gnome-shell
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
1524abc947
gnome-shell/src/st/st-texture-cache.c
Florian Müllner d81237b9d6 st/texture-cache: Cancel pending requests on icon-theme changes 
As outlined in commit 36b8dcbe07, we can end up with wrong icons
if the icon theme changes right after a GTK theme change to/from
HighContrast triggered a theme reload.

That's because when we reload icons for the new icon theme, there
are already pending requests due to the icon-style change; those
requests are simply re-used for the new icons, with the existing
icon infos from the old theme.

The above commit applied a simple work-around by changing the
icon theme before the GTK theme, but that only works for the
HighContrast switch in our own UI.

It turns out that Settings also uses the "wrong" order, so the
issue still reproduces with the Universal Access panel.

So instead of relying on everything changing the settings in the
order we expect, cancel all ongoing requests on icon-theme changes.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1277
2020-05-25 12:55:28 +02:00

1635 lines
52 KiB
C
Raw Blame History

/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* st-texture-cache.h: Object for loading and caching images as textures
*
* Copyright 2009, 2010 Red Hat, Inc.
* Copyright 2010, Maxim Ermilov
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
* more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "st-image-content.h"
#include "st-texture-cache.h"
#include "st-private.h"
#include "st-settings.h"
#include <gtk/gtk.h>
#include <math.h>
#include <string.h>
#include <glib.h>
#define CACHE_PREFIX_ICON "icon:"
#define CACHE_PREFIX_FILE "file:"
#define CACHE_PREFIX_FILE_FOR_CAIRO "file-for-cairo:"
struct _StTextureCachePrivate
{
GtkIconTheme *icon_theme;
GSettings *settings;
/* Things that were loaded with a cache policy != NONE */
GHashTable *keyed_cache; /* char * -> ClutterImage* */
GHashTable *keyed_surface_cache; /* char * -> cairo_surface_t* */
GHashTable *used_scales; /* Set: double */
/* Presently this is used to de-duplicate requests for GIcons and async URIs. */
GHashTable *outstanding_requests; /* char * -> AsyncTextureLoadData * */
/* File monitors to evict cache data on changes */
GHashTable *file_monitors; /* char * -> GFileMonitor * */
GCancellable *cancellable;
};
static void st_texture_cache_dispose (GObject *object);
static void st_texture_cache_finalize (GObject *object);
enum
{
ICON_THEME_CHANGED,
TEXTURE_FILE_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0, };
G_DEFINE_TYPE(StTextureCache, st_texture_cache, G_TYPE_OBJECT);
/* We want to preserve the aspect ratio by default, also the default
* pipeline for an empty texture is full opacity white, which we
* definitely don't want. Skip that by setting 0 opacity.
*/
static ClutterActor *
create_invisible_actor (void)
{
return g_object_new (CLUTTER_TYPE_ACTOR,
"opacity", 0,
"request-mode", CLUTTER_REQUEST_CONTENT_SIZE,
NULL);
}
/* Reverse the opacity we added while loading */
static void
set_content_from_image (ClutterActor *actor,
ClutterContent *image)
{
g_assert (image && CLUTTER_IS_IMAGE (image));
clutter_actor_set_content (actor, image);
clutter_actor_set_opacity (actor, 255);
}
static void
st_texture_cache_class_init (StTextureCacheClass *klass)
{
GObjectClass *gobject_class = (GObjectClass *)klass;
gobject_class->dispose = st_texture_cache_dispose;
gobject_class->finalize = st_texture_cache_finalize;
signals[ICON_THEME_CHANGED] =
g_signal_new ("icon-theme-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0, /* no default handler slot */
NULL, NULL, NULL,
G_TYPE_NONE, 0);
signals[TEXTURE_FILE_CHANGED] =
g_signal_new ("texture-file-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0, /* no default handler slot */
NULL, NULL, NULL,
G_TYPE_NONE, 1, G_TYPE_FILE);
}
/* Evicts all cached textures for named icons */
static void
st_texture_cache_evict_icons (StTextureCache *cache)
{
GHashTableIter iter;
gpointer key;
gpointer value;
g_hash_table_iter_init (&iter, cache->priv->keyed_cache);
while (g_hash_table_iter_next (&iter, &key, &value))
{
const char *cache_key = key;
/* This is too conservative - it takes out all cached textures
* for GIcons even when they aren't named icons, but it's not
* worth the complexity of parsing the key and calling
* g_icon_new_for_string(); icon theme changes aren't normal */
if (g_str_has_prefix (cache_key, CACHE_PREFIX_ICON))
g_hash_table_iter_remove (&iter);
}
}
static void
on_icon_theme_changed (StSettings *settings,
GParamSpec *pspec,
StTextureCache *cache)
{
g_autofree gchar *theme = NULL;
g_cancellable_cancel (cache->priv->cancellable);
g_cancellable_reset (cache->priv->cancellable);
st_texture_cache_evict_icons (cache);
g_object_get (settings, "gtk-icon-theme", &theme, NULL);
gtk_icon_theme_set_custom_theme (cache->priv->icon_theme, theme);
g_signal_emit (cache, signals[ICON_THEME_CHANGED], 0);
}
static void
on_gtk_icon_theme_changed (GtkIconTheme *icon_theme,
StTextureCache *self)
{
st_texture_cache_evict_icons (self);
g_signal_emit (self, signals[ICON_THEME_CHANGED], 0);
}
static void
st_texture_cache_init (StTextureCache *self)
{
StSettings *settings;
self->priv = g_new0 (StTextureCachePrivate, 1);
self->priv->icon_theme = gtk_icon_theme_new ();
gtk_icon_theme_add_resource_path (self->priv->icon_theme,
"/org/gnome/shell/theme/icons");
g_signal_connect (self->priv->icon_theme, "changed",
G_CALLBACK (on_gtk_icon_theme_changed), self);
settings = st_settings_get ();
g_signal_connect (settings, "notify::gtk-icon-theme",
G_CALLBACK (on_icon_theme_changed), self);
self->priv->keyed_cache = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, g_object_unref);
self->priv->keyed_surface_cache = g_hash_table_new_full (g_str_hash,
g_str_equal,
g_free,
(GDestroyNotify) cairo_surface_destroy);
self->priv->used_scales = g_hash_table_new_full (g_double_hash, g_double_equal,
g_free, NULL);
self->priv->outstanding_requests = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, NULL);
self->priv->file_monitors = g_hash_table_new_full (g_file_hash, (GEqualFunc) g_file_equal,
g_object_unref, g_object_unref);
self->priv->cancellable = g_cancellable_new ();
on_icon_theme_changed (settings, NULL, self);
}
static void
st_texture_cache_dispose (GObject *object)
{
StTextureCache *self = (StTextureCache*)object;
g_cancellable_cancel (self->priv->cancellable);
g_clear_object (&self->priv->settings);
g_clear_object (&self->priv->icon_theme);
g_clear_object (&self->priv->cancellable);
g_clear_pointer (&self->priv->keyed_cache, g_hash_table_destroy);
g_clear_pointer (&self->priv->keyed_surface_cache, g_hash_table_destroy);
g_clear_pointer (&self->priv->used_scales, g_hash_table_destroy);
g_clear_pointer (&self->priv->outstanding_requests, g_hash_table_destroy);
g_clear_pointer (&self->priv->file_monitors, g_hash_table_destroy);
G_OBJECT_CLASS (st_texture_cache_parent_class)->dispose (object);
}
static void
st_texture_cache_finalize (GObject *object)
{
G_OBJECT_CLASS (st_texture_cache_parent_class)->finalize (object);
}
static void
compute_pixbuf_scale (gint width,
gint height,
gint available_width,
gint available_height,
gint *new_width,
gint *new_height)
{
int scaled_width, scaled_height;
if (width == 0 || height == 0)
{
*new_width = *new_height = 0;
return;
}
if (available_width >= 0 && available_height >= 0)
{
/* This should keep the aspect ratio of the image intact, because if
* available_width < (available_height * width) / height
* then
* (available_width * height) / width < available_height
* So we are guaranteed to either scale the image to have an available_width
* for width and height scaled accordingly OR have the available_height
* for height and width scaled accordingly, whichever scaling results
* in the image that can fit both available dimensions.
*/
scaled_width = MIN (available_width, (available_height * width) / height);
scaled_height = MIN (available_height, (available_width * height) / width);
}
else if (available_width >= 0)
{
scaled_width = available_width;
scaled_height = (available_width * height) / width;
}
else if (available_height >= 0)
{
scaled_width = (available_height * width) / height;
scaled_height = available_height;
}
else
{
scaled_width = scaled_height = 0;
}
/* Scale the image only if that will not increase its original dimensions. */
if (scaled_width > 0 && scaled_height > 0 && scaled_width < width && scaled_height < height)
{
*new_width = scaled_width;
*new_height = scaled_height;
}
else
{
*new_width = width;
*new_height = height;
}
}
static void
rgba_from_clutter (GdkRGBA *rgba,
ClutterColor *color)
{
rgba->red = color->red / 255.;
rgba->green = color->green / 255.;
rgba->blue = color->blue / 255.;
rgba->alpha = color->alpha / 255.;
}
/* A private structure for keeping width, height and scale. */
typedef struct {
int width;
int height;
int scale;
} Dimensions;
/* This struct corresponds to a request for an texture.
* It's creasted when something needs a new texture,
* and destroyed when the texture data is loaded. */
typedef struct {
StTextureCache *cache;
StTextureCachePolicy policy;
char *key;
guint width;
guint height;
guint paint_scale;
gfloat resource_scale;
GSList *actors;
GtkIconInfo *icon_info;
StIconColors *colors;
GFile *file;
} AsyncTextureLoadData;
static void
texture_load_data_free (gpointer p)
{
AsyncTextureLoadData *data = p;
if (data->icon_info)
{
g_object_unref (data->icon_info);
if (data->colors)
st_icon_colors_unref (data->colors);
}
else if (data->file)
g_object_unref (data->file);
if (data->key)
g_free (data->key);
if (data->actors)
g_slist_free_full (data->actors, (GDestroyNotify) g_object_unref);
g_slice_free (AsyncTextureLoadData, data);
}
/**
* on_image_size_prepared:
* @pixbuf_loader: #GdkPixbufLoader loading the image
* @width: the original width of the image
* @height: the original height of the image
* @data: pointer to the #Dimensions sructure containing available width and height for the image,
* available width or height can be -1 if the dimension is not limited
*
* Private function.
*
* Sets the size of the image being loaded to fit the available width and height dimensions,
* but never scales up the image beyond its actual size.
* Intended to be used as a callback for #GdkPixbufLoader "size-prepared" signal.
*/
static void
on_image_size_prepared (GdkPixbufLoader *pixbuf_loader,
gint width,
gint height,
gpointer data)
{
Dimensions *available_dimensions = data;
int available_width = available_dimensions->width;
int available_height = available_dimensions->height;
int scale_factor = available_dimensions->scale;
int scaled_width;
int scaled_height;
compute_pixbuf_scale (width, height, available_width, available_height,
&scaled_width, &scaled_height);
gdk_pixbuf_loader_set_size (pixbuf_loader,
scaled_width * scale_factor,
scaled_height * scale_factor);
}
static GdkPixbuf *
impl_load_pixbuf_data (const guchar *data,
gsize size,
int available_width,
int available_height,
int scale,
GError **error)
{
GdkPixbufLoader *pixbuf_loader = NULL;
GdkPixbuf *rotated_pixbuf = NULL;
GdkPixbuf *pixbuf;
gboolean success;
Dimensions available_dimensions;
int width_before_rotation, width_after_rotation;
pixbuf_loader = gdk_pixbuf_loader_new ();
available_dimensions.width = available_width;
available_dimensions.height = available_height;
available_dimensions.scale = scale;
g_signal_connect (pixbuf_loader, "size-prepared",
G_CALLBACK (on_image_size_prepared), &available_dimensions);
success = gdk_pixbuf_loader_write (pixbuf_loader, data, size, error);
if (!success)
goto out;
success = gdk_pixbuf_loader_close (pixbuf_loader, error);
if (!success)
goto out;
pixbuf = gdk_pixbuf_loader_get_pixbuf (pixbuf_loader);
width_before_rotation = gdk_pixbuf_get_width (pixbuf);
rotated_pixbuf = gdk_pixbuf_apply_embedded_orientation (pixbuf);
width_after_rotation = gdk_pixbuf_get_width (rotated_pixbuf);
/* There is currently no way to tell if the pixbuf will need to be rotated before it is loaded,
* so we only check that once it is loaded, and reload it again if it needs to be rotated in order
* to use the available width and height correctly.
* See http://bugzilla.gnome.org/show_bug.cgi?id=579003
*/
if (width_before_rotation != width_after_rotation)
{
g_object_unref (pixbuf_loader);
g_object_unref (rotated_pixbuf);
rotated_pixbuf = NULL;
pixbuf_loader = gdk_pixbuf_loader_new ();
/* We know that the image will later be rotated, so we reverse the available dimensions. */
available_dimensions.width = available_height;
available_dimensions.height = available_width;
available_dimensions.scale = scale;
g_signal_connect (pixbuf_loader, "size-prepared",
G_CALLBACK (on_image_size_prepared), &available_dimensions);
success = gdk_pixbuf_loader_write (pixbuf_loader, data, size, error);
if (!success)
goto out;
success = gdk_pixbuf_loader_close (pixbuf_loader, error);
if (!success)
goto out;
pixbuf = gdk_pixbuf_loader_get_pixbuf (pixbuf_loader);
rotated_pixbuf = gdk_pixbuf_apply_embedded_orientation (pixbuf);
}
out:
if (pixbuf_loader)
g_object_unref (pixbuf_loader);
return rotated_pixbuf;
}
static GdkPixbuf *
impl_load_pixbuf_file (GFile *file,
int available_width,
int available_height,
int paint_scale,
float resource_scale,
GError **error)
{
GdkPixbuf *pixbuf = NULL;
char *contents = NULL;
gsize size;
if (g_file_load_contents (file, NULL, &contents, &size, NULL, error))
{
int scale = ceilf (paint_scale * resource_scale);
pixbuf = impl_load_pixbuf_data ((const guchar *) contents, size,
available_width, available_height,
scale,
error);
}
g_free (contents);
return pixbuf;
}
static void
load_pixbuf_thread (GTask *result,
gpointer source,
gpointer task_data,
GCancellable *cancellable)
{
GdkPixbuf *pixbuf;
AsyncTextureLoadData *data = task_data;
GError *error = NULL;
g_assert (data != NULL);
g_assert (data->file != NULL);
pixbuf = impl_load_pixbuf_file (data->file, data->width, data->height,
data->paint_scale, data->resource_scale,
&error);
if (error != NULL)
g_task_return_error (result, error);
else if (pixbuf)
g_task_return_pointer (result, g_object_ref (pixbuf), g_object_unref);
g_clear_object (&pixbuf);
}
static GdkPixbuf *
load_pixbuf_async_finish (StTextureCache *cache, GAsyncResult *result, GError **error)
{
return g_task_propagate_pointer (G_TASK (result), error);
}
static ClutterContent *
pixbuf_to_st_content_image (GdkPixbuf *pixbuf,
int width,
int height,
int paint_scale,
float resource_scale)
{
ClutterContent *image;
g_autoptr(GError) error = NULL;
float native_width, native_height;
native_width = ceilf (gdk_pixbuf_get_width (pixbuf) / resource_scale);
native_height = ceilf (gdk_pixbuf_get_height (pixbuf) / resource_scale);
if (width < 0 && height < 0)
{
width = native_width;
height = native_height;
}
else if (width < 0)
{
height *= paint_scale;
width = native_width * (height / native_height);
}
else if (height < 0)
{
width *= paint_scale;
height = native_height * (width / native_width);
}
else
{
width *= paint_scale;
height *= paint_scale;
}
image = st_image_content_new_with_preferred_size (width, height);
clutter_image_set_data (CLUTTER_IMAGE (image),
gdk_pixbuf_get_pixels (pixbuf),
gdk_pixbuf_get_has_alpha (pixbuf) ?
COGL_PIXEL_FORMAT_RGBA_8888 : COGL_PIXEL_FORMAT_RGB_888,
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf),
gdk_pixbuf_get_rowstride (pixbuf),
&error);
if (error)
{
g_warning ("Failed to allocate texture: %s", error->message);
g_clear_object (&image);
}
return image;
}
static cairo_surface_t *
pixbuf_to_cairo_surface (GdkPixbuf *pixbuf)
{
cairo_surface_t *dummy_surface;
cairo_pattern_t *pattern;
cairo_surface_t *surface;
cairo_t *cr;
dummy_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
cr = cairo_create (dummy_surface);
gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
pattern = cairo_get_source (cr);
cairo_pattern_get_surface (pattern, &surface);
cairo_surface_reference (surface);
cairo_destroy (cr);
cairo_surface_destroy (dummy_surface);
return surface;
}
static void
finish_texture_load (AsyncTextureLoadData *data,
GdkPixbuf *pixbuf)
{
g_autoptr(ClutterContent) image = NULL;
GSList *iter;
StTextureCache *cache;
cache = data->cache;
g_hash_table_remove (cache->priv->outstanding_requests, data->key);
if (pixbuf == NULL)
goto out;
if (data->policy != ST_TEXTURE_CACHE_POLICY_NONE)
{
gpointer orig_key = NULL, value = NULL;
if (!g_hash_table_lookup_extended (cache->priv->keyed_cache, data->key,
&orig_key, &value))
{
image = pixbuf_to_st_content_image (pixbuf,
data->width, data->height,
data->paint_scale,
data->resource_scale);
if (!image)
goto out;
g_hash_table_insert (cache->priv->keyed_cache, g_strdup (data->key),
g_object_ref (image));
}
else
{
image = g_object_ref (value);
}
}
else
{
image = pixbuf_to_st_content_image (pixbuf,
data->width, data->height,
data->paint_scale,
data->resource_scale);
if (!image)
goto out;
}
for (iter = data->actors; iter; iter = iter->next)
{
ClutterActor *actor = iter->data;
set_content_from_image (actor, image);
}
out:
texture_load_data_free (data);
}
static void
on_symbolic_icon_loaded (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
GdkPixbuf *pixbuf;
pixbuf = gtk_icon_info_load_symbolic_finish (GTK_ICON_INFO (source), result, NULL, NULL);
finish_texture_load (user_data, pixbuf);
g_clear_object (&pixbuf);
}
static void
on_icon_loaded (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
GdkPixbuf *pixbuf;
pixbuf = gtk_icon_info_load_icon_finish (GTK_ICON_INFO (source), result, NULL);
finish_texture_load (user_data, pixbuf);
g_clear_object (&pixbuf);
}
static void
on_pixbuf_loaded (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
GdkPixbuf *pixbuf;
pixbuf = load_pixbuf_async_finish (ST_TEXTURE_CACHE (source), result, NULL);
finish_texture_load (user_data, pixbuf);
g_clear_object (&pixbuf);
}
static void
load_texture_async (StTextureCache *cache,
AsyncTextureLoadData *data)
{
if (data->file)
{
GTask *task = g_task_new (cache, NULL, on_pixbuf_loaded, data);
g_task_set_task_data (task, data, NULL);
g_task_run_in_thread (task, load_pixbuf_thread);
g_object_unref (task);
}
else if (data->icon_info)
{
StIconColors *colors = data->colors;
if (colors)
{
GdkRGBA foreground_color;
GdkRGBA success_color;
GdkRGBA warning_color;
GdkRGBA error_color;
rgba_from_clutter (&foreground_color, &colors->foreground);
rgba_from_clutter (&success_color, &colors->success);
rgba_from_clutter (&warning_color, &colors->warning);
rgba_from_clutter (&error_color, &colors->error);
gtk_icon_info_load_symbolic_async (data->icon_info,
&foreground_color, &success_color,
&warning_color, &error_color,
cache->priv->cancellable,
on_symbolic_icon_loaded, data);
}
else
{
gtk_icon_info_load_icon_async (data->icon_info,
cache->priv->cancellable,
on_icon_loaded, data);
}
}
else
g_assert_not_reached ();
}
typedef struct {
StTextureCache *cache;
ClutterActor *actor;
gint size;
GObject *source;
gulong notify_signal_id;
gboolean weakref_active;
} StTextureCachePropertyBind;
static void
st_texture_cache_reset_texture (StTextureCachePropertyBind *bind,
const char *propname)
{
cairo_surface_t *surface;
g_object_get (bind->source, propname, &surface, NULL);
if (surface != NULL &&
cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_IMAGE &&
(cairo_image_surface_get_format (surface) == CAIRO_FORMAT_ARGB32 ||
cairo_image_surface_get_format (surface) == CAIRO_FORMAT_RGB24))
{
g_autoptr(ClutterContent) image = NULL;
g_autoptr(GError) error = NULL;
int size = bind->size;
if (size < 0)
clutter_actor_get_preferred_width (bind->actor, -1, NULL, (float *)&size);
image = clutter_actor_get_content (bind->actor);
if (!image || !CLUTTER_IS_IMAGE (image))
image = st_image_content_new_with_preferred_size (size, size);
else
g_object_ref (image);
clutter_image_set_data (CLUTTER_IMAGE (image),
cairo_image_surface_get_data (surface),
cairo_image_surface_get_format (surface) == CAIRO_FORMAT_ARGB32 ?
COGL_PIXEL_FORMAT_BGRA_8888 : COGL_PIXEL_FORMAT_BGR_888,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
cairo_image_surface_get_stride (surface),
&error);
if (image)
clutter_actor_set_content (bind->actor, image);
else if (error)
g_warning ("Failed to allocate texture: %s", error->message);
clutter_actor_set_opacity (bind->actor, 255);
}
else
clutter_actor_set_opacity (bind->actor, 0);
}
static void
st_texture_cache_on_pixbuf_notify (GObject *object,
GParamSpec *paramspec,
gpointer data)
{
StTextureCachePropertyBind *bind = data;
st_texture_cache_reset_texture (bind, paramspec->name);
}
static void
st_texture_cache_bind_weak_notify (gpointer data,
GObject *source_location)
{
StTextureCachePropertyBind *bind = data;
bind->weakref_active = FALSE;
g_signal_handler_disconnect (bind->source, bind->notify_signal_id);
}
static void
st_texture_cache_free_bind (gpointer data)
{
StTextureCachePropertyBind *bind = data;
if (bind->weakref_active)
g_object_weak_unref (G_OBJECT (bind->actor), st_texture_cache_bind_weak_notify, bind);
g_slice_free (StTextureCachePropertyBind, bind);
}
/**
* st_texture_cache_bind_cairo_surface_property:
* @cache:
* @object: A #GObject with a property @property_name of type #GdkPixbuf
* @property_name: Name of a property
*
* Create a #ClutterActor which tracks the #cairo_surface_t value of a GObject property
* named by @property_name. Unlike other methods in StTextureCache, the underlying
* #CoglTexture is not shared by default with other invocations to this method.
*
* If the source object is destroyed, the texture will continue to show the last
* value of the property.
*
* Return value: (transfer none): A new #StWidget
*/
StWidget *
st_texture_cache_bind_cairo_surface_property (StTextureCache *cache,
GObject *object,
const char *property_name,
gint size)
{
StWidget *widget;
gchar *notify_key;
StTextureCachePropertyBind *bind;
widget = g_object_new (ST_TYPE_WIDGET,
"opacity", 0,
"width", (float)size,
"height", (float)size,
NULL);
bind = g_slice_new0 (StTextureCachePropertyBind);
bind->cache = cache;
bind->actor = CLUTTER_ACTOR (widget);
bind->size = size;
bind->source = object;
g_object_weak_ref (G_OBJECT (widget), st_texture_cache_bind_weak_notify, bind);
bind->weakref_active = TRUE;
st_texture_cache_reset_texture (bind, property_name);
notify_key = g_strdup_printf ("notify::%s", property_name);
bind->notify_signal_id = g_signal_connect_data (object, notify_key, G_CALLBACK(st_texture_cache_on_pixbuf_notify),
bind, (GClosureNotify)st_texture_cache_free_bind, 0);
g_free (notify_key);
return widget;
}
/**
* st_texture_cache_load: (skip)
* @cache: A #StTextureCache
* @key: Arbitrary string used to refer to item
* @policy: Caching policy
* @load: Function to create the texture, if not already cached
* @data: User data passed to @load
* @error: A #GError
*
* Load an arbitrary texture, caching it. The string chosen for @key
* should be of the form "type-prefix:type-uuid". For example,
* "url:file:///usr/share/icons/hicolor/48x48/apps/firefox.png", or
* "stock-icon:gtk-ok".
*
* Returns: (transfer full): A newly-referenced handle to the texture
*/
CoglTexture *
st_texture_cache_load (StTextureCache *cache,
const char *key,
StTextureCachePolicy policy,
StTextureCacheLoader load,
void *data,
GError **error)
{
CoglTexture *texture;
texture = g_hash_table_lookup (cache->priv->keyed_cache, key);
if (!texture)
{
texture = load (cache, key, data, error);
if (texture && policy == ST_TEXTURE_CACHE_POLICY_FOREVER)
g_hash_table_insert (cache->priv->keyed_cache, g_strdup (key), texture);
}
if (texture && policy == ST_TEXTURE_CACHE_POLICY_FOREVER)
cogl_object_ref (texture);
return texture;
}
/**
* ensure_request:
* @cache:
* @key: A cache key
* @policy: Cache policy
* @request: (out): If no request is outstanding, one will be created and returned here
* @texture: A texture to be added to the request
*
* Check for any outstanding load for the data represented by @key. If there
* is already a request pending, append it to that request to avoid loading
* the data multiple times.
*
* Returns: %TRUE if there is already a request pending
*/
static gboolean
ensure_request (StTextureCache *cache,
const char *key,
StTextureCachePolicy policy,
AsyncTextureLoadData **request,
ClutterActor *actor)
{
ClutterContent *image;
AsyncTextureLoadData *pending;
gboolean had_pending;
image = g_hash_table_lookup (cache->priv->keyed_cache, key);
if (image != NULL)
{
/* We had this cached already, just set the texture and we're done. */
set_content_from_image (actor, image);
return TRUE;
}
pending = g_hash_table_lookup (cache->priv->outstanding_requests, key);
had_pending = pending != NULL;
if (pending == NULL)
{
/* Not cached and no pending request, create it */
*request = g_slice_new0 (AsyncTextureLoadData);
if (policy != ST_TEXTURE_CACHE_POLICY_NONE)
g_hash_table_insert (cache->priv->outstanding_requests, g_strdup (key), *request);
}
else
*request = pending;
/* Regardless of whether there was a pending request, prepend our texture here. */
(*request)->actors = g_slist_prepend ((*request)->actors, g_object_ref (actor));
return had_pending;
}
/**
* st_texture_cache_load_gicon:
* @cache: The texture cache instance
* @theme_node: (nullable): The #StThemeNode to use for colors, or NULL
* if the icon must not be recolored
* @icon: the #GIcon to load
* @size: Size of themed
* @paint_scale: Scale factor of display
* @resource_scale: Resource scale factor
*
* This method returns a new #ClutterActor for a given #GIcon. If the
* icon isn't loaded already, the texture will be filled
* asynchronously.
*
* Return Value: (transfer none): A new #ClutterActor for the icon, or %NULL if not found
*/
ClutterActor *
st_texture_cache_load_gicon (StTextureCache *cache,
StThemeNode *theme_node,
GIcon *icon,
gint size,
gint paint_scale,
gfloat resource_scale)
{
AsyncTextureLoadData *request;
ClutterActor *actor;
gint scale;
char *gicon_string;
char *key;
float actor_size;
GtkIconTheme *theme;
GtkIconInfo *info;
StTextureCachePolicy policy;
StIconColors *colors = NULL;
StIconStyle icon_style = ST_ICON_STYLE_REQUESTED;
GtkIconLookupFlags lookup_flags;
if (theme_node)
{
colors = st_theme_node_get_icon_colors (theme_node);
icon_style = st_theme_node_get_icon_style (theme_node);
}
/* Do theme lookups in the main thread to avoid thread-unsafety */
theme = cache->priv->icon_theme;
lookup_flags = GTK_ICON_LOOKUP_USE_BUILTIN;
if (icon_style == ST_ICON_STYLE_REGULAR)
lookup_flags |= GTK_ICON_LOOKUP_FORCE_REGULAR;
else if (icon_style == ST_ICON_STYLE_SYMBOLIC)
lookup_flags |= GTK_ICON_LOOKUP_FORCE_SYMBOLIC;
if (clutter_get_default_text_direction () == CLUTTER_TEXT_DIRECTION_RTL)
lookup_flags |= GTK_ICON_LOOKUP_DIR_RTL;
else
lookup_flags |= GTK_ICON_LOOKUP_DIR_LTR;
scale = ceilf (paint_scale * resource_scale);
info = gtk_icon_theme_lookup_by_gicon_for_scale (theme, icon,
size, scale,
lookup_flags);
if (info == NULL)
return NULL;
gicon_string = g_icon_to_string (icon);
/* A return value of NULL indicates that the icon can not be serialized,
* so don't have a unique identifier for it as a cache key, and thus can't
* be cached. If it is cachable, we hardcode a policy of FOREVER here for
* now; we should actually blow this away on icon theme changes probably */
policy = gicon_string != NULL ? ST_TEXTURE_CACHE_POLICY_FOREVER
: ST_TEXTURE_CACHE_POLICY_NONE;
if (colors)
{
/* This raises some doubts about the practice of using string keys */
key = g_strdup_printf (CACHE_PREFIX_ICON "%s,size=%d,scale=%d,style=%d,colors=%2x%2x%2x%2x,%2x%2x%2x%2x,%2x%2x%2x%2x,%2x%2x%2x%2x",
gicon_string, size, scale, icon_style,
colors->foreground.red, colors->foreground.blue, colors->foreground.green, colors->foreground.alpha,
colors->warning.red, colors->warning.blue, colors->warning.green, colors->warning.alpha,
colors->error.red, colors->error.blue, colors->error.green, colors->error.alpha,
colors->success.red, colors->success.blue, colors->success.green, colors->success.alpha);
}
else
{
key = g_strdup_printf (CACHE_PREFIX_ICON "%s,size=%d,scale=%d,style=%d",
gicon_string, size, scale, icon_style);
}
g_free (gicon_string);
actor = create_invisible_actor ();
actor_size = size * paint_scale;
clutter_actor_set_size (actor, actor_size, actor_size);
if (ensure_request (cache, key, policy, &request, actor))
{
/* If there's an outstanding request, we've just added ourselves to it */
g_object_unref (info);
g_free (key);
}
else
{
/* Else, make a new request */
request->cache = cache;
/* Transfer ownership of key */
request->key = key;
request->policy = policy;
request->colors = colors ? st_icon_colors_ref (colors) : NULL;
request->icon_info = info;
request->width = request->height = size;
request->paint_scale = paint_scale;
request->resource_scale = resource_scale;
load_texture_async (cache, request);
}
return actor;
}
static ClutterActor *
load_from_pixbuf (GdkPixbuf *pixbuf,
int paint_scale,
float resource_scale)
{
g_autoptr(ClutterContent) image = NULL;
ClutterActor *actor;
image = pixbuf_to_st_content_image (pixbuf, -1, -1, paint_scale, resource_scale);
actor = g_object_new (CLUTTER_TYPE_ACTOR,
"request-mode", CLUTTER_REQUEST_CONTENT_SIZE,
NULL);
clutter_actor_set_content (actor, image);
return actor;
}
static void
hash_table_remove_with_scales (GHashTable *hash,
GList *scales,
const char *base_key)
{
GList *l;
for (l = scales; l; l = l->next)
{
double scale = *((double *)l->data);
g_autofree char *key = NULL;
key = g_strdup_printf ("%s%f", base_key, scale);
g_hash_table_remove (hash, key);
}
}
static void
hash_table_insert_scale (GHashTable *hash,
double scale)
{
double *saved_scale;
if (g_hash_table_contains (hash, &scale))
return;
saved_scale = g_new (double, 1);
*saved_scale = scale;
g_hash_table_add (hash, saved_scale);
}
static void
file_changed_cb (GFileMonitor *monitor,
GFile *file,
GFile *other,
GFileMonitorEvent event_type,
gpointer user_data)
{
StTextureCache *cache = user_data;
char *key;
guint file_hash;
g_autoptr (GList) scales = NULL;
if (event_type != G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT)
return;
file_hash = g_file_hash (file);
scales = g_hash_table_get_keys (cache->priv->used_scales);
key = g_strdup_printf (CACHE_PREFIX_FILE "%u", file_hash);
g_hash_table_remove (cache->priv->keyed_cache, key);
hash_table_remove_with_scales (cache->priv->keyed_cache, scales, key);
g_free (key);
key = g_strdup_printf (CACHE_PREFIX_FILE_FOR_CAIRO "%u", file_hash);
g_hash_table_remove (cache->priv->keyed_surface_cache, key);
hash_table_remove_with_scales (cache->priv->keyed_surface_cache, scales, key);
g_free (key);
g_signal_emit (cache, signals[TEXTURE_FILE_CHANGED], 0, file);
}
static void
ensure_monitor_for_file (StTextureCache *cache,
GFile *file)
{
StTextureCachePrivate *priv = cache->priv;
/* No point in trying to monitor files that are part of a
* GResource, since it does not support file monitoring.
*/
if (g_file_has_uri_scheme (file, "resource"))
return;
if (g_hash_table_lookup (priv->file_monitors, file) == NULL)
{
GFileMonitor *monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE,
NULL, NULL);
g_signal_connect (monitor, "changed",
G_CALLBACK (file_changed_cb), cache);
g_hash_table_insert (priv->file_monitors, g_object_ref (file), monitor);
}
}
typedef struct {
GFile *gfile;
gint grid_width, grid_height;
gint paint_scale;
gfloat resource_scale;
ClutterActor *actor;
GCancellable *cancellable;
GFunc load_callback;
gpointer load_callback_data;
} AsyncImageData;
static void
on_data_destroy (gpointer data)
{
AsyncImageData *d = (AsyncImageData *)data;
g_object_unref (d->gfile);
g_object_unref (d->actor);
g_object_unref (d->cancellable);
g_slice_free (AsyncImageData, d);
}
static void
on_sliced_image_actor_destroyed (ClutterActor *actor,
gpointer data)
{
GTask *task = data;
GCancellable *cancellable = g_task_get_cancellable (task);
g_cancellable_cancel (cancellable);
}
static void
on_sliced_image_loaded (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
GObject *cache = source_object;
AsyncImageData *data = (AsyncImageData *)user_data;
GTask *task = G_TASK (res);
GList *list, *pixbufs;
if (g_task_had_error (task) || g_cancellable_is_cancelled (data->cancellable))
return;
pixbufs = g_task_propagate_pointer (task, NULL);
for (list = pixbufs; list; list = list->next)
{
ClutterActor *actor = load_from_pixbuf (GDK_PIXBUF (list->data),
data->paint_scale,
data->resource_scale);
clutter_actor_hide (actor);
clutter_actor_add_child (data->actor, actor);
}
g_list_free_full (pixbufs, g_object_unref);
g_signal_handlers_disconnect_by_func (data->actor,
on_sliced_image_actor_destroyed,
task);
if (data->load_callback != NULL)
data->load_callback (cache, data->load_callback_data);
}
static void
free_glist_unref_gobjects (gpointer p)
{
g_list_free_full (p, g_object_unref);
}
static void
on_loader_size_prepared (GdkPixbufLoader *loader,
gint width,
gint height,
gpointer user_data)
{
AsyncImageData *data = user_data;
int scale = ceilf (data->paint_scale * data->resource_scale);
gdk_pixbuf_loader_set_size (loader, width * scale, height * scale);
}
static void
load_sliced_image (GTask *result,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
AsyncImageData *data;
GList *res = NULL;
GdkPixbuf *pix;
gint width, height, y, x;
gint scale_factor;
GdkPixbufLoader *loader;
GError *error = NULL;
gchar *buffer = NULL;
gsize length;
g_assert (cancellable);
data = task_data;
g_assert (data);
loader = gdk_pixbuf_loader_new ();
g_signal_connect (loader, "size-prepared", G_CALLBACK (on_loader_size_prepared), data);
if (!g_file_load_contents (data->gfile, cancellable, &buffer, &length, NULL, &error))
{
g_warning ("Failed to open sliced image: %s", error->message);
goto out;
}
if (!gdk_pixbuf_loader_write (loader, (const guchar *) buffer, length, &error))
{
g_warning ("Failed to load image: %s", error->message);
goto out;
}
if (!gdk_pixbuf_loader_close (loader, NULL))
goto out;
pix = gdk_pixbuf_loader_get_pixbuf (loader);
width = gdk_pixbuf_get_width (pix);
height = gdk_pixbuf_get_height (pix);
scale_factor = ceilf (data->paint_scale * data->resource_scale);
for (y = 0; y < height; y += data->grid_height * scale_factor)
{
for (x = 0; x < width; x += data->grid_width * scale_factor)
{
GdkPixbuf *pixbuf = gdk_pixbuf_new_subpixbuf (pix, x, y,
data->grid_width * scale_factor,
data->grid_height * scale_factor);
g_assert (pixbuf != NULL);
res = g_list_append (res, pixbuf);
}
}
out:
/* We don't need the original pixbuf anymore, which is owned by the loader,
* though the subpixbufs will hold a reference. */
g_object_unref (loader);
g_free (buffer);
g_clear_pointer (&error, g_error_free);
g_task_return_pointer (result, res, free_glist_unref_gobjects);
}
/**
* st_texture_cache_load_sliced_image:
* @cache: A #StTextureCache
* @file: A #GFile
* @grid_width: Width in pixels
* @grid_height: Height in pixels
* @paint_scale: Scale factor of the display
* @load_callback: (scope async) (nullable): Function called when the image is loaded, or %NULL
* @user_data: Data to pass to the load callback
*
* This function reads a single image file which contains multiple images internally.
* The image file will be divided using @grid_width and @grid_height;
* note that the dimensions of the image loaded from @path
* should be a multiple of the specified grid dimensions.
*
* Returns: (transfer none): A new #ClutterActor
*/
ClutterActor *
st_texture_cache_load_sliced_image (StTextureCache *cache,
GFile *file,
gint grid_width,
gint grid_height,
gint paint_scale,
gfloat resource_scale,
GFunc load_callback,
gpointer user_data)
{
AsyncImageData *data;
GTask *result;
ClutterActor *actor = clutter_actor_new ();
GCancellable *cancellable = g_cancellable_new ();
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_assert (paint_scale > 0);
g_assert (resource_scale > 0);
data = g_slice_new0 (AsyncImageData);
data->grid_width = grid_width;
data->grid_height = grid_height;
data->paint_scale = paint_scale;
data->resource_scale = resource_scale;
data->gfile = g_object_ref (file);
data->actor = actor;
data->cancellable = cancellable;
data->load_callback = load_callback;
data->load_callback_data = user_data;
g_object_ref (G_OBJECT (actor));
result = g_task_new (cache, cancellable, on_sliced_image_loaded, data);
g_signal_connect (actor, "destroy",
G_CALLBACK (on_sliced_image_actor_destroyed), result);
g_task_set_task_data (result, data, on_data_destroy);
g_task_run_in_thread (result, load_sliced_image);
g_object_unref (result);
return actor;
}
/**
* st_texture_cache_load_file_async:
* @cache: The texture cache instance
* @file: a #GFile of the image file from which to create a pixbuf
* @available_width: available width for the image, can be -1 if not limited
* @available_height: available height for the image, can be -1 if not limited
* @paint_scale: scale factor of the display
* @resource_scale: Resource scale factor
*
* Asynchronously load an image. Initially, the returned texture will have a natural
* size of zero. At some later point, either the image will be loaded successfully
* and at that point size will be negotiated, or upon an error, no image will be set.
*
* Return value: (transfer none): A new #ClutterActor with no image loaded initially.
*/
ClutterActor *
st_texture_cache_load_file_async (StTextureCache *cache,
GFile *file,
int available_width,
int available_height,
int paint_scale,
gfloat resource_scale)
{
ClutterActor *actor;
AsyncTextureLoadData *request;
StTextureCachePolicy policy;
gchar *key;
int scale;
scale = ceilf (paint_scale * resource_scale);
key = g_strdup_printf (CACHE_PREFIX_FILE "%u%d", g_file_hash (file), scale);
policy = ST_TEXTURE_CACHE_POLICY_NONE; /* XXX */
actor = create_invisible_actor ();
if (ensure_request (cache, key, policy, &request, actor))
{
/* If there's an outstanding request, we've just added ourselves to it */
g_free (key);
}
else
{
/* Else, make a new request */
request->cache = cache;
/* Transfer ownership of key */
request->key = key;
request->file = g_object_ref (file);
request->policy = policy;
request->width = available_width;
request->height = available_height;
request->paint_scale = paint_scale;
request->resource_scale = resource_scale;
load_texture_async (cache, request);
}
ensure_monitor_for_file (cache, file);
return actor;
}
static CoglTexture *
st_texture_cache_load_file_sync_to_cogl_texture (StTextureCache *cache,
StTextureCachePolicy policy,
GFile *file,
int available_width,
int available_height,
int paint_scale,
gfloat resource_scale,
GError **error)
{
ClutterContent *image;
CoglTexture *texdata;
GdkPixbuf *pixbuf;
char *key;
key = g_strdup_printf (CACHE_PREFIX_FILE "%u%f", g_file_hash (file), resource_scale);
texdata = NULL;
image = g_hash_table_lookup (cache->priv->keyed_cache, key);
if (image == NULL)
{
pixbuf = impl_load_pixbuf_file (file, available_width, available_height,
paint_scale, resource_scale, error);
if (!pixbuf)
goto out;
image = pixbuf_to_st_content_image (pixbuf,
available_height, available_width,
paint_scale, resource_scale);
g_object_unref (pixbuf);
if (!image)
goto out;
if (policy == ST_TEXTURE_CACHE_POLICY_FOREVER)
{
g_hash_table_insert (cache->priv->keyed_cache, g_strdup (key), image);
hash_table_insert_scale (cache->priv->used_scales, (double)resource_scale);
}
}
/* Because the texture is loaded synchronously, we won't call
* clutter_image_set_data(), so it's safe to use the texture
* of ClutterImage here. */
texdata = clutter_image_get_texture (CLUTTER_IMAGE (image));
cogl_object_ref (texdata);
ensure_monitor_for_file (cache, file);
out:
g_free (key);
return texdata;
}
static cairo_surface_t *
st_texture_cache_load_file_sync_to_cairo_surface (StTextureCache *cache,
StTextureCachePolicy policy,
GFile *file,
int available_width,
int available_height,
int paint_scale,
gfloat resource_scale,
GError **error)
{
cairo_surface_t *surface;
GdkPixbuf *pixbuf;
char *key;
key = g_strdup_printf (CACHE_PREFIX_FILE_FOR_CAIRO "%u%f", g_file_hash (file), resource_scale);
surface = g_hash_table_lookup (cache->priv->keyed_surface_cache, key);
if (surface == NULL)
{
pixbuf = impl_load_pixbuf_file (file, available_width, available_height,
paint_scale, resource_scale, error);
if (!pixbuf)
goto out;
surface = pixbuf_to_cairo_surface (pixbuf);
g_object_unref (pixbuf);
if (policy == ST_TEXTURE_CACHE_POLICY_FOREVER)
{
cairo_surface_reference (surface);
g_hash_table_insert (cache->priv->keyed_surface_cache,
g_strdup (key), surface);
hash_table_insert_scale (cache->priv->used_scales, (double)resource_scale);
}
}
else
cairo_surface_reference (surface);
ensure_monitor_for_file (cache, file);
out:
g_free (key);
return surface;
}
/**
* st_texture_cache_load_file_to_cogl_texture: (skip)
* @cache: A #StTextureCache
* @file: A #GFile in supported image format
* @paint_scale: Scale factor of the display
* @resource_scale: Resource scale factor
*
* This function synchronously loads the given file path
* into a COGL texture. On error, a warning is emitted
* and %NULL is returned.
*
* Returns: (transfer full): a new #CoglTexture
*/
CoglTexture *
st_texture_cache_load_file_to_cogl_texture (StTextureCache *cache,
GFile *file,
gint paint_scale,
gfloat resource_scale)
{
CoglTexture *texture;
GError *error = NULL;
texture = st_texture_cache_load_file_sync_to_cogl_texture (cache, ST_TEXTURE_CACHE_POLICY_FOREVER,
file, -1, -1, paint_scale, resource_scale,
&error);
if (texture == NULL)
{
char *uri = g_file_get_uri (file);
g_warning ("Failed to load %s: %s", uri, error->message);
g_clear_error (&error);
g_free (uri);
}
return texture;
}
/**
* st_texture_cache_load_file_to_cairo_surface:
* @cache: A #StTextureCache
* @file: A #GFile in supported image format
* @paint_scale: Scale factor of the display
* @resource_scale: Resource scale factor
*
* This function synchronously loads the given file path
* into a cairo surface. On error, a warning is emitted
* and %NULL is returned.
*
* Returns: (transfer full): a new #cairo_surface_t
*/
cairo_surface_t *
st_texture_cache_load_file_to_cairo_surface (StTextureCache *cache,
GFile *file,
gint paint_scale,
gfloat resource_scale)
{
cairo_surface_t *surface;
GError *error = NULL;
surface = st_texture_cache_load_file_sync_to_cairo_surface (cache, ST_TEXTURE_CACHE_POLICY_FOREVER,
file, -1, -1, paint_scale, resource_scale,
&error);
if (surface == NULL)
{
char *uri = g_file_get_uri (file);
g_warning ("Failed to load %s: %s", uri, error->message);
g_clear_error (&error);
g_free (uri);
}
return surface;
}
static StTextureCache *instance = NULL;
/**
* st_texture_cache_get_default:
*
* Return value: (transfer none): The global texture cache
*/
StTextureCache*
st_texture_cache_get_default (void)
{
if (instance == NULL)
instance = g_object_new (ST_TYPE_TEXTURE_CACHE, NULL);
return instance;
}
gboolean
st_texture_cache_rescan_icon_theme (StTextureCache *cache)
{
StTextureCachePrivate *priv = cache->priv;
return gtk_icon_theme_rescan_if_needed (priv->icon_theme);
}
Reference in New Issue View Git Blame Copy Permalink