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clutter/offscreen-effect: Add new create_pipeline() vfunc

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The most annoying aspect of ClutterOffscreenEffect right now, and
the reason for all its subclasses to override pre-paint, is that
the pipeline creation isn't under subclasses' control. That means
all subclasses must ask ClutterOffscreenEffect to run pre-paint
and create the pipeline, then they all create their own pipelines
to paint.

To reduce this complexity, add a new create_pipeline() vfunc to
ClutterOffscreenEffect. Next commits will port effects to use this
new vfunc.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1355>
This commit is contained in:
Georges Basile Stavracas Neto 2020-07-05 13:41:19 -03:00
parent 6654053250
commit 5794871977
2 changed files with 27 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
clutter/clutter/clutter-offscreen-effect.c
View File

@ -158,6 +158,25 @@ ensure_pipeline_filter_for_scale (ClutterOffscreenEffect *self,
filter, filter);
}
static CoglPipeline *
clutter_offscreen_effect_real_create_pipeline (ClutterOffscreenEffect *effect,
CoglTexture *texture)
{
ClutterOffscreenEffectPrivate *priv = effect->priv;
CoglContext *ctx =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
CoglPipeline *pipeline;
float resource_scale;
resource_scale = clutter_actor_get_real_resource_scale (priv->actor);
pipeline = cogl_pipeline_new (ctx);
ensure_pipeline_filter_for_scale (effect, resource_scale);
cogl_pipeline_set_layer_texture (pipeline, 0, texture);
return pipeline;
}
static void
video_memory_purged (ClutterOffscreenEffect *self)
{
@ -171,6 +190,8 @@ update_fbo (ClutterEffect *effect,
float resource_scale)
{
ClutterOffscreenEffect *self = CLUTTER_OFFSCREEN_EFFECT (effect);
ClutterOffscreenEffectClass *offscreen_class =
CLUTTER_OFFSCREEN_EFFECT_GET_CLASS (self);
ClutterOffscreenEffectPrivate *priv = self->priv;
ClutterActor *stage_actor;
CoglOffscreen *offscreen;
@ -211,15 +232,6 @@ update_fbo (ClutterEffect *effect,
return TRUE;
}
if (priv->pipeline == NULL)
{
CoglContext *ctx =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
priv->pipeline = cogl_pipeline_new (ctx);
ensure_pipeline_filter_for_scale (self, resource_scale);
}
g_clear_pointer (&priv->texture, cogl_object_unref);
g_clear_object (&priv->offscreen);
@ -228,8 +240,6 @@ update_fbo (ClutterEffect *effect,
if (priv->texture == NULL)
return FALSE;
cogl_pipeline_set_layer_texture (priv->pipeline, 0, priv->texture);
priv->target_width = target_width;
priv->target_height = target_height;
@ -250,6 +260,9 @@ update_fbo (ClutterEffect *effect,
priv->offscreen = offscreen;
cogl_clear_object (&priv->pipeline);
priv->pipeline = offscreen_class->create_pipeline (self, priv->texture);
return TRUE;
}
@ -527,6 +540,7 @@ clutter_offscreen_effect_class_init (ClutterOffscreenEffectClass *klass)
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
klass->create_texture = clutter_offscreen_effect_real_create_texture;
klass->create_pipeline = clutter_offscreen_effect_real_create_pipeline;
klass->paint_target = clutter_offscreen_effect_real_paint_target;
meta_class->set_actor = clutter_offscreen_effect_set_actor;

2
clutter/clutter/clutter-offscreen-effect.h
View File

@ -79,6 +79,8 @@ struct _ClutterOffscreenEffectClass
CoglHandle (* create_texture) (ClutterOffscreenEffect *effect,
gfloat width,
gfloat height);
CoglPipeline* (* create_pipeline) (ClutterOffscreenEffect *effect,
CoglTexture *texture);
void (* paint_target) (ClutterOffscreenEffect *effect,
ClutterPaintContext *paint_context);