Adding upstream version 3.38.6.upstream/3.38.6upstream

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

1 files changed, 469 insertions, 0 deletions

diff --git a/src/st/st-theme-node-transition.c b/src/st/st-theme-node-transition.c
new file mode 100644
index 0000000..b736665
--- /dev/null
+++ b/src/st/st-theme-node-transition.c
@@ -0,0 +1,469 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * st-theme-node-transition.c: Theme node transitions for StWidget.
+ *
+ * Copyright 2010 Florian Müllner
+ * Copyright 2010 Adel Gadllah
+ *
+ * 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 <math.h>
+
+#include "st-theme-node-transition.h"
+
+enum {
+  COMPLETED,
+  NEW_FRAME,
+  LAST_SIGNAL
+};
+
+typedef struct _StThemeNodeTransitionPrivate StThemeNodeTransitionPrivate;
+
+struct _StThemeNodeTransition {
+  GObject parent;
+
+  StThemeNodeTransitionPrivate *priv;
+};
+
+struct _StThemeNodeTransitionPrivate {
+  StThemeNode *old_theme_node;
+  StThemeNode *new_theme_node;
+
+  StThemeNodePaintState old_paint_state;
+  StThemeNodePaintState new_paint_state;
+
+  CoglTexture *old_texture;
+  CoglTexture *new_texture;
+
+  CoglFramebuffer *old_offscreen;
+  CoglFramebuffer *new_offscreen;
+
+  CoglPipeline *material;
+
+  ClutterTimeline *timeline;
+
+  gulong timeline_completed_id;
+  gulong timeline_new_frame_id;
+
+  ClutterActorBox last_allocation;
+  ClutterActorBox offscreen_box;
+
+  gboolean needs_setup;
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
+G_DEFINE_TYPE_WITH_PRIVATE (StThemeNodeTransition, st_theme_node_transition, G_TYPE_OBJECT);
+
+
+static void
+on_timeline_completed (ClutterTimeline       *timeline,
+                       StThemeNodeTransition *transition)
+{
+  g_signal_emit (transition, signals[COMPLETED], 0);
+}
+
+static void
+on_timeline_new_frame (ClutterTimeline       *timeline,
+                       gint                   frame_num,
+                       StThemeNodeTransition *transition)
+{
+  g_signal_emit (transition, signals[NEW_FRAME], 0);
+}
+
+StThemeNodeTransition *
+st_theme_node_transition_new (ClutterActor          *actor,
+                              StThemeNode           *from_node,
+                              StThemeNode           *to_node,
+                              StThemeNodePaintState *old_paint_state,
+                              unsigned int           duration)
+{
+  StThemeNodeTransition *transition;
+  g_return_val_if_fail (ST_IS_THEME_NODE (from_node), NULL);
+  g_return_val_if_fail (ST_IS_THEME_NODE (to_node), NULL);
+
+  duration = st_theme_node_get_transition_duration (to_node);
+
+  transition = g_object_new (ST_TYPE_THEME_NODE_TRANSITION, NULL);
+
+  transition->priv->old_theme_node = g_object_ref (from_node);
+  transition->priv->new_theme_node = g_object_ref (to_node);
+
+  st_theme_node_paint_state_copy (&transition->priv->old_paint_state,
+                                  old_paint_state);
+
+  transition->priv->timeline = clutter_timeline_new_for_actor (actor, duration);
+
+  transition->priv->timeline_completed_id =
+    g_signal_connect (transition->priv->timeline, "completed",
+                      G_CALLBACK (on_timeline_completed), transition);
+  transition->priv->timeline_new_frame_id =
+    g_signal_connect (transition->priv->timeline, "new-frame",
+                      G_CALLBACK (on_timeline_new_frame), transition);
+
+  clutter_timeline_set_progress_mode (transition->priv->timeline, CLUTTER_EASE_IN_OUT_QUAD);
+
+  clutter_timeline_start (transition->priv->timeline);
+
+  return transition;
+}
+
+/**
+ * st_theme_node_transition_get_new_paint_state: (skip)
+ *
+ */
+StThemeNodePaintState *
+st_theme_node_transition_get_new_paint_state (StThemeNodeTransition *transition)
+{
+  return &transition->priv->new_paint_state;
+}
+
+void
+st_theme_node_transition_update (StThemeNodeTransition *transition,
+                                 StThemeNode           *new_node)
+{
+  StThemeNodeTransitionPrivate *priv;
+  StThemeNode *old_node;
+  ClutterTimelineDirection direction;
+
+  g_return_if_fail (ST_IS_THEME_NODE_TRANSITION (transition));
+  g_return_if_fail (ST_IS_THEME_NODE (new_node));
+
+  priv = transition->priv;
+  direction = clutter_timeline_get_direction (priv->timeline);
+  old_node = (direction == CLUTTER_TIMELINE_FORWARD) ? priv->old_theme_node
+                                                     : priv->new_theme_node;
+
+  /* If the update is the reversal of the current transition,
+   * we reverse the timeline.
+   * Otherwise, we should initiate a new transition from the
+   * current state to the new one; this is hard to do if the
+   * transition is in an intermediate state, so we just cancel
+   * the ongoing transition in that case.
+   * Note that reversing a timeline before any time elapsed
+   * results in the timeline's time position being set to the
+   * full duration - this is not what we want, so we cancel the
+   * transition as well in that case.
+   */
+  if (st_theme_node_equal (new_node, old_node))
+    {
+      {
+        StThemeNodePaintState tmp;
+
+        st_theme_node_paint_state_init (&tmp);
+        st_theme_node_paint_state_copy (&tmp, &priv->old_paint_state);
+        st_theme_node_paint_state_copy (&priv->old_paint_state, &priv->new_paint_state);
+        st_theme_node_paint_state_copy (&priv->new_paint_state, &tmp);
+        st_theme_node_paint_state_free (&tmp);
+      }
+
+      if (clutter_timeline_get_elapsed_time (priv->timeline) > 0)
+        {
+          if (direction == CLUTTER_TIMELINE_FORWARD)
+            clutter_timeline_set_direction (priv->timeline,
+                                            CLUTTER_TIMELINE_BACKWARD);
+          else
+            clutter_timeline_set_direction (priv->timeline,
+                                            CLUTTER_TIMELINE_FORWARD);
+        }
+      else
+        {
+          clutter_timeline_stop (priv->timeline);
+          g_signal_emit (transition, signals[COMPLETED], 0);
+        }
+    }
+  else
+    {
+      if (clutter_timeline_get_elapsed_time (priv->timeline) > 0)
+        {
+          clutter_timeline_stop (priv->timeline);
+          g_signal_emit (transition, signals[COMPLETED], 0);
+        }
+      else
+        {
+          guint new_duration = st_theme_node_get_transition_duration (new_node);
+
+          clutter_timeline_set_duration (priv->timeline, new_duration);
+
+          g_object_unref (priv->new_theme_node);
+          priv->new_theme_node = g_object_ref (new_node);
+
+          st_theme_node_paint_state_invalidate (&priv->new_paint_state);
+        }
+    }
+}
+
+static void
+calculate_offscreen_box (StThemeNodeTransition *transition,
+                         const ClutterActorBox *allocation)
+{
+  ClutterActorBox paint_box;
+
+  st_theme_node_transition_get_paint_box (transition,
+                                          allocation,
+                                          &paint_box);
+  transition->priv->offscreen_box.x1 = paint_box.x1 - allocation->x1;
+  transition->priv->offscreen_box.y1 = paint_box.y1 - allocation->y1;
+  transition->priv->offscreen_box.x2 = paint_box.x2 - allocation->x1;
+  transition->priv->offscreen_box.y2 = paint_box.y2 - allocation->y1;
+}
+
+void
+st_theme_node_transition_get_paint_box (StThemeNodeTransition *transition,
+                                        const ClutterActorBox *allocation,
+                                        ClutterActorBox       *paint_box)
+{
+  StThemeNodeTransitionPrivate *priv = transition->priv;
+  ClutterActorBox old_node_box, new_node_box;
+
+  st_theme_node_get_paint_box (priv->old_theme_node,
+                               allocation,
+                               &old_node_box);
+
+  st_theme_node_get_paint_box (priv->new_theme_node,
+                               allocation,
+                               &new_node_box);
+
+  paint_box->x1 = MIN (old_node_box.x1, new_node_box.x1);
+  paint_box->y1 = MIN (old_node_box.y1, new_node_box.y1);
+  paint_box->x2 = MAX (old_node_box.x2, new_node_box.x2);
+  paint_box->y2 = MAX (old_node_box.y2, new_node_box.y2);
+}
+
+static gboolean
+setup_framebuffers (StThemeNodeTransition *transition,
+                    const ClutterActorBox *allocation,
+                    float                  resource_scale)
+{
+  StThemeNodeTransitionPrivate *priv = transition->priv;
+  CoglContext *ctx;
+  guint width, height;
+  GError *catch_error = NULL;
+
+  /* template material to avoid unnecessary shader compilation */
+  static CoglPipeline *material_template = NULL;
+
+  ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
+  width  = ceilf ((priv->offscreen_box.x2 - priv->offscreen_box.x1) * resource_scale);
+  height = ceilf ((priv->offscreen_box.y2 - priv->offscreen_box.y1) * resource_scale);
+
+  g_return_val_if_fail (width  > 0, FALSE);
+  g_return_val_if_fail (height > 0, FALSE);
+
+  cogl_clear_object (&priv->old_texture);
+  priv->old_texture = COGL_TEXTURE (cogl_texture_2d_new_with_size (ctx, width, height));
+
+  cogl_clear_object (&priv->new_texture);
+  priv->new_texture = COGL_TEXTURE (cogl_texture_2d_new_with_size (ctx, width, height));
+
+  if (priv->old_texture == NULL)
+    return FALSE;
+
+  if (priv->new_texture == NULL)
+    return FALSE;
+
+  cogl_clear_object (&priv->old_offscreen);
+  priv->old_offscreen = COGL_FRAMEBUFFER (cogl_offscreen_new_with_texture (priv->old_texture));
+  if (!cogl_framebuffer_allocate (priv->old_offscreen, &catch_error))
+    {
+      g_error_free (catch_error);
+      cogl_clear_object (&priv->old_offscreen);
+      return FALSE;
+    }
+
+  cogl_clear_object (&priv->new_offscreen);
+  priv->new_offscreen = COGL_FRAMEBUFFER (cogl_offscreen_new_with_texture (priv->new_texture));
+  if (!cogl_framebuffer_allocate (priv->new_offscreen, &catch_error))
+    {
+      g_error_free (catch_error);
+      cogl_clear_object (&priv->new_offscreen);
+      return FALSE;
+    }
+
+  if (priv->material == NULL)
+    {
+      if (G_UNLIKELY (material_template == NULL))
+        {
+          CoglContext *ctx =
+            clutter_backend_get_cogl_context (clutter_get_default_backend ());
+          material_template = cogl_pipeline_new (ctx);
+
+          cogl_pipeline_set_layer_combine (material_template, 0,
+                                           "RGBA = REPLACE (TEXTURE)",
+                                           NULL);
+          cogl_pipeline_set_layer_combine (material_template, 1,
+                                           "RGBA = INTERPOLATE (PREVIOUS, "
+                                                               "TEXTURE, "
+                                                               "CONSTANT[A])",
+                                           NULL);
+          cogl_pipeline_set_layer_combine (material_template, 2,
+                                           "RGBA = MODULATE (PREVIOUS, "
+                                                            "PRIMARY)",
+                                           NULL);
+        }
+      priv->material = cogl_pipeline_copy (material_template);
+    }
+
+  cogl_pipeline_set_layer_texture (priv->material, 0, priv->new_texture);
+  cogl_pipeline_set_layer_texture (priv->material, 1, priv->old_texture);
+
+  cogl_framebuffer_clear4f (priv->old_offscreen, COGL_BUFFER_BIT_COLOR,
+                            0, 0, 0, 0);
+  cogl_framebuffer_orthographic (priv->old_offscreen,
+                                 priv->offscreen_box.x1,
+                                 priv->offscreen_box.y1,
+                                 priv->offscreen_box.x2,
+                                 priv->offscreen_box.y2, 0.0, 1.0);
+
+  st_theme_node_paint (priv->old_theme_node, &priv->old_paint_state,
+                       priv->old_offscreen, allocation, 255, resource_scale);
+
+  cogl_framebuffer_clear4f (priv->new_offscreen, COGL_BUFFER_BIT_COLOR,
+                            0, 0, 0, 0);
+  cogl_framebuffer_orthographic (priv->new_offscreen,
+                                 priv->offscreen_box.x1,
+                                 priv->offscreen_box.y1,
+                                 priv->offscreen_box.x2,
+                                 priv->offscreen_box.y2, 0.0, 1.0);
+  st_theme_node_paint (priv->new_theme_node, &priv->new_paint_state,
+                       priv->new_offscreen, allocation, 255, resource_scale);
+
+  return TRUE;
+}
+
+void
+st_theme_node_transition_paint (StThemeNodeTransition *transition,
+                                CoglFramebuffer       *framebuffer,
+                                ClutterActorBox       *allocation,
+                                guint8                 paint_opacity,
+                                float                  resource_scale)
+{
+  StThemeNodeTransitionPrivate *priv = transition->priv;
+
+  CoglColor constant;
+  float tex_coords[] = {
+    0.0, 0.0, 1.0, 1.0,
+    0.0, 0.0, 1.0, 1.0,
+  };
+
+  g_return_if_fail (ST_IS_THEME_NODE (priv->old_theme_node));
+  g_return_if_fail (ST_IS_THEME_NODE (priv->new_theme_node));
+
+  if (!clutter_actor_box_equal (allocation, &priv->last_allocation))
+    priv->needs_setup = TRUE;
+
+  if (priv->needs_setup)
+    {
+      priv->last_allocation = *allocation;
+
+      calculate_offscreen_box (transition, allocation);
+      priv->needs_setup = !setup_framebuffers (transition, allocation,
+                                               resource_scale);
+
+      if (priv->needs_setup) /* setting up framebuffers failed */
+        return;
+    }
+
+  cogl_color_init_from_4f (&constant, 0., 0., 0.,
+                           clutter_timeline_get_progress (priv->timeline));
+  cogl_pipeline_set_layer_combine_constant (priv->material, 1, &constant);
+
+  cogl_pipeline_set_color4ub (priv->material,
+                              paint_opacity, paint_opacity,
+                              paint_opacity, paint_opacity);
+
+  cogl_framebuffer_draw_multitextured_rectangle (framebuffer,
+                                                 priv->material,
+                                                 priv->offscreen_box.x1,
+                                                 priv->offscreen_box.y1,
+                                                 priv->offscreen_box.x2,
+                                                 priv->offscreen_box.y2,
+                                                 tex_coords, 8);
+}
+
+static void
+st_theme_node_transition_dispose (GObject *object)
+{
+  StThemeNodeTransitionPrivate *priv = ST_THEME_NODE_TRANSITION (object)->priv;
+
+  g_clear_object (&priv->old_theme_node);
+  g_clear_object (&priv->new_theme_node);
+
+  cogl_clear_object (&priv->old_texture);
+  cogl_clear_object (&priv->new_texture);
+
+  cogl_clear_object (&priv->old_offscreen);
+  cogl_clear_object (&priv->new_offscreen);
+
+  cogl_clear_object (&priv->material);
+
+  if (priv->timeline)
+    {
+      g_clear_signal_handler (&priv->timeline_completed_id, priv->timeline);
+      g_clear_signal_handler (&priv->timeline_new_frame_id, priv->timeline);
+
+      g_clear_object (&priv->timeline);
+    }
+
+  priv->timeline_completed_id = 0;
+  priv->timeline_new_frame_id = 0;
+
+  st_theme_node_paint_state_free (&priv->old_paint_state);
+  st_theme_node_paint_state_free (&priv->new_paint_state);
+
+  G_OBJECT_CLASS (st_theme_node_transition_parent_class)->dispose (object);
+}
+
+static void
+st_theme_node_transition_init (StThemeNodeTransition *transition)
+{
+  transition->priv = st_theme_node_transition_get_instance_private (transition);
+
+  transition->priv->old_theme_node = NULL;
+  transition->priv->new_theme_node = NULL;
+
+  transition->priv->old_texture = NULL;
+  transition->priv->new_texture = NULL;
+
+  transition->priv->old_offscreen = NULL;
+  transition->priv->new_offscreen = NULL;
+
+  st_theme_node_paint_state_init (&transition->priv->old_paint_state);
+  st_theme_node_paint_state_init (&transition->priv->new_paint_state);
+
+  transition->priv->needs_setup = TRUE;
+}
+
+static void
+st_theme_node_transition_class_init (StThemeNodeTransitionClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->dispose = st_theme_node_transition_dispose;
+
+  signals[COMPLETED] =
+    g_signal_new ("completed",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  0, NULL, NULL, NULL,
+                  G_TYPE_NONE, 0);
+
+  signals[NEW_FRAME] =
+    g_signal_new ("new-frame",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  0, NULL, NULL, NULL,
+                  G_TYPE_NONE, 0);
+}