Adding upstream version 3.38.6.upstream/3.38.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 346 insertions, 0 deletions

diff --git a/src/st/st-image-content.c b/src/st/st-image-content.c
new file mode 100644
index 0000000..92f1c14
--- /dev/null
+++ b/src/st/st-image-content.c
@@ -0,0 +1,346 @@
+/* -*- 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);
+}