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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 15:07:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 15:07:22 +0000
commitf9d480cfe50ca1d7a0f0b5a2b8bb9932962bfbe7 (patch)
treece9e8db2d4e8799780fa72ae8f1953039373e2ee /src/st/st-image-content.c
parentInitial commit. (diff)
downloadgnome-shell-f9d480cfe50ca1d7a0f0b5a2b8bb9932962bfbe7.tar.xz
gnome-shell-f9d480cfe50ca1d7a0f0b5a2b8bb9932962bfbe7.zip
Adding upstream version 3.38.6.upstream/3.38.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/st/st-image-content.c')
-rw-r--r--src/st/st-image-content.c346
1 files changed, 346 insertions, 0 deletions
diff --git a/src/st/st-image-content.c b/src/st/st-image-content.c
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+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * st-image-content.h: A content image with scaling support
+ *
+ * Copyright 2019 Canonical, Ltd
+ *
+ * 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 "st-image-content.h"
+#include "st-private.h"
+
+struct _StImageContent
+{
+ /*< private >*/
+ ClutterImage parent_instance;
+};
+
+typedef struct _StImageContentPrivate StImageContentPrivate;
+struct _StImageContentPrivate
+{
+ int width;
+ int height;
+};
+
+enum
+{
+ PROP_0,
+ PROP_PREFERRED_WIDTH,
+ PROP_PREFERRED_HEIGHT,
+};
+
+static void clutter_content_interface_init (ClutterContentInterface *iface);
+static void g_icon_interface_init (GIconIface *iface);
+static void g_loadable_icon_interface_init (GLoadableIconIface *iface);
+
+G_DEFINE_TYPE_WITH_CODE (StImageContent, st_image_content, CLUTTER_TYPE_IMAGE,
+ G_ADD_PRIVATE (StImageContent)
+ G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_CONTENT,
+ clutter_content_interface_init)
+ G_IMPLEMENT_INTERFACE (G_TYPE_ICON,
+ g_icon_interface_init)
+ G_IMPLEMENT_INTERFACE (G_TYPE_LOADABLE_ICON,
+ g_loadable_icon_interface_init))
+
+static void
+st_image_content_init (StImageContent *self)
+{
+}
+
+static void
+st_image_content_constructed (GObject *object)
+{
+ StImageContent *self = ST_IMAGE_CONTENT (object);
+ StImageContentPrivate *priv = st_image_content_get_instance_private (self);
+
+ if (priv->width < 0 || priv->height < 0)
+ g_warning ("StImageContent initialized with invalid preferred size: %dx%d\n",
+ priv->width, priv->height);
+}
+
+static void
+st_image_content_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ StImageContent *self = ST_IMAGE_CONTENT (object);
+ StImageContentPrivate *priv = st_image_content_get_instance_private (self);
+
+ switch (prop_id)
+ {
+ case PROP_PREFERRED_WIDTH:
+ g_value_set_int (value, priv->width);
+ break;
+
+ case PROP_PREFERRED_HEIGHT:
+ g_value_set_int (value, priv->height);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+st_image_content_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ StImageContent *self = ST_IMAGE_CONTENT (object);
+ StImageContentPrivate *priv = st_image_content_get_instance_private (self);
+
+ switch (prop_id)
+ {
+ case PROP_PREFERRED_WIDTH:
+ priv->width = g_value_get_int (value);
+ break;
+
+ case PROP_PREFERRED_HEIGHT:
+ priv->height = g_value_get_int (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+st_image_content_class_init (StImageContentClass *klass)
+{
+ GParamSpec *pspec;
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->constructed = st_image_content_constructed;
+ object_class->get_property = st_image_content_get_property;
+ object_class->set_property = st_image_content_set_property;
+
+ pspec = g_param_spec_int ("preferred-width",
+ "Preferred Width",
+ "Preferred Width of the Content when painted",
+ -1, G_MAXINT, -1,
+ G_PARAM_CONSTRUCT_ONLY | ST_PARAM_READWRITE);
+ g_object_class_install_property (object_class, PROP_PREFERRED_WIDTH, pspec);
+
+ pspec = g_param_spec_int ("preferred-height",
+ "Preferred Height",
+ "Preferred Height of the Content when painted",
+ -1, G_MAXINT, -1,
+ G_PARAM_CONSTRUCT_ONLY | ST_PARAM_READWRITE);
+ g_object_class_install_property (object_class, PROP_PREFERRED_HEIGHT, pspec);
+}
+
+static gboolean
+st_image_content_get_preferred_size (ClutterContent *content,
+ float *width,
+ float *height)
+{
+ StImageContent *self = ST_IMAGE_CONTENT (content);
+ StImageContentPrivate *priv = st_image_content_get_instance_private (self);
+ CoglTexture *texture;
+
+ texture = clutter_image_get_texture (CLUTTER_IMAGE (content));
+
+ if (texture == NULL)
+ return FALSE;
+
+ g_assert_cmpint (priv->width, >, -1);
+ g_assert_cmpint (priv->height, >, -1);
+
+ if (width != NULL)
+ *width = (float) priv->width;
+
+ if (height != NULL)
+ *height = (float) priv->height;
+
+ return TRUE;
+}
+
+static GdkPixbuf*
+pixbuf_from_image (StImageContent *image)
+{
+ CoglTexture *texture;
+ int width, height, rowstride;
+ uint8_t *data;
+
+ texture = clutter_image_get_texture (CLUTTER_IMAGE (image));
+ if (!texture || !cogl_texture_is_get_data_supported (texture))
+ return NULL;
+
+ width = cogl_texture_get_width (texture);
+ height = cogl_texture_get_width (texture);
+ rowstride = 4 * width;
+ data = g_new (uint8_t, rowstride * height);
+
+ cogl_texture_get_data (texture, COGL_PIXEL_FORMAT_RGBA_8888, rowstride, data);
+
+ return gdk_pixbuf_new_from_data ((const guchar *)data,
+ GDK_COLORSPACE_RGB,
+ TRUE, 8, width, height, rowstride,
+ (GdkPixbufDestroyNotify)g_free, NULL);
+}
+
+static void
+clutter_content_interface_init (ClutterContentInterface *iface)
+{
+ iface->get_preferred_size = st_image_content_get_preferred_size;
+}
+
+static guint
+st_image_content_hash (GIcon *icon)
+{
+ return g_direct_hash (icon);
+}
+
+static gboolean
+st_image_content_equal (GIcon *icon1,
+ GIcon *icon2)
+{
+ return g_direct_equal (icon1, icon2);
+}
+
+static GVariant *
+st_image_content_serialize (GIcon *icon)
+{
+ g_autoptr (GdkPixbuf) pixbuf = NULL;
+
+ pixbuf = pixbuf_from_image (ST_IMAGE_CONTENT (icon));
+ if (!pixbuf)
+ return NULL;
+
+ return g_icon_serialize (G_ICON (pixbuf));
+}
+
+static void
+g_icon_interface_init (GIconIface *iface)
+{
+ iface->hash = st_image_content_hash;
+ iface->equal = st_image_content_equal;
+ iface->serialize = st_image_content_serialize;
+}
+
+static GInputStream *
+st_image_load (GLoadableIcon *icon,
+ int size,
+ char **type,
+ GCancellable *cancellable,
+ GError **error)
+{
+ g_autoptr (GdkPixbuf) pixbuf = NULL;
+
+ pixbuf = pixbuf_from_image (ST_IMAGE_CONTENT (icon));
+ if (!pixbuf)
+ {
+ g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+ "Failed to read texture");
+ return NULL;
+ }
+
+ return g_loadable_icon_load (G_LOADABLE_ICON (pixbuf),
+ size, type, cancellable, error);
+}
+
+static void
+load_image_thread (GTask *task,
+ gpointer object,
+ gpointer task_data,
+ GCancellable *cancellable)
+{
+ GInputStream *stream;
+ GError *error = NULL;
+ char *type;
+
+ stream = st_image_load (G_LOADABLE_ICON (object),
+ GPOINTER_TO_INT (task_data),
+ &type,
+ cancellable,
+ &error);
+
+ if (error)
+ {
+ g_task_return_error (task, error);
+ }
+ else
+ {
+ g_task_set_task_data (task, type, g_free);
+ g_task_return_pointer (task, stream, g_object_unref);
+ }
+}
+
+static void
+st_image_load_async (GLoadableIcon *icon,
+ int size,
+ GCancellable *cancellable,
+ GAsyncReadyCallback callback,
+ gpointer user_data)
+{
+ g_autoptr (GTask) task = NULL;
+
+ task = g_task_new (icon, cancellable, callback, user_data);
+ g_task_set_task_data (task, GINT_TO_POINTER (size), NULL);
+ g_task_run_in_thread (task, load_image_thread);
+}
+
+static GInputStream *
+st_image_load_finish (GLoadableIcon *icon,
+ GAsyncResult *res,
+ char **type,
+ GError **error)
+{
+ GInputStream *stream;
+
+ stream = g_task_propagate_pointer (G_TASK (res), error);
+ if (!stream)
+ return NULL;
+
+ if (type)
+ *type = g_strdup (g_task_get_task_data (G_TASK (res)));
+
+ return stream;
+}
+
+static void
+g_loadable_icon_interface_init (GLoadableIconIface *iface)
+{
+ iface->load = st_image_load;
+ iface->load_async = st_image_load_async;
+ iface->load_finish = st_image_load_finish;
+}
+
+/**
+ * st_image_content_new_with_preferred_size:
+ * @width: The preferred width to be used when drawing the content
+ * @height: The preferred width to be used when drawing the content
+ *
+ * Creates a new #StImageContent, a simple content for sized images.
+ *
+ * See #ClutterImage for setting the actual image to display or #StIcon for
+ * displaying icons.
+ *
+ * Returns: (transfer full): the newly created #StImageContent content
+ * Use g_object_unref() when done.
+ */
+ClutterContent *
+st_image_content_new_with_preferred_size (int width,
+ int height)
+{
+ return g_object_new (ST_TYPE_IMAGE_CONTENT,
+ "preferred-width", width,
+ "preferred-height", height,
+ NULL);
+}