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stage: Deprecate :use-fog and :fog

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The depth cueing through GL fog has been broken for a long while, now.

The fog-related API in Clutter is ridiculously limited, and harks back
to simpler times; the ClutterFog structure is not enough to express all
the GL fog machinery, and required application code to connect to the
Stage's paint implementation and drop into Cogl directly.

Additionally, the fixed pipeline fog machinery in GL simply does not
work with premultiplied alpha, unless you use a shader - and in that
case it would only work for textures. Let's deprecate it, and just
don't do anything if somebody has the brilliant idea of setting the
:use-fog property to TRUE.
This commit is contained in:
Emmanuele Bassi 2011-12-30 10:23:15 +00:00
parent 65889fa075
commit e689d01800
3 changed files with 106 additions and 91 deletions
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44
clutter/clutter-stage.c
View File

@ -48,9 +48,13 @@
#include "config.h" #include "config.h"
#endif #endif
#include <math.h>
#include <cairo.h> #include <cairo.h>
#define CLUTTER_DISABLE_DEPRECATION_WARNINGS
#include "clutter-stage.h" #include "clutter-stage.h"
#include "deprecated/clutter-stage.h"
#include "clutter-actor-private.h" #include "clutter-actor-private.h"
#include "clutter-backend-private.h" #include "clutter-backend-private.h"
@ -76,13 +80,6 @@
#include "cogl/cogl.h" #include "cogl/cogl.h"
#include <math.h>
#ifdef USE_GDKPIXBUF
#include <gdk-pixbuf/gdk-pixbuf.h>
#endif
G_DEFINE_TYPE (ClutterStage, clutter_stage, CLUTTER_TYPE_GROUP); G_DEFINE_TYPE (ClutterStage, clutter_stage, CLUTTER_TYPE_GROUP);
#define CLUTTER_STAGE_GET_PRIVATE(obj) \ #define CLUTTER_STAGE_GET_PRIVATE(obj) \
@ -646,7 +643,8 @@ clutter_stage_paint (ClutterActor *self)
CLUTTER_TIMER_STOP (_clutter_uprof_context, stage_clear_timer); CLUTTER_TIMER_STOP (_clutter_uprof_context, stage_clear_timer);
if (priv->use_fog) #if 0
if (G_UNLIKELY (priv->use_fog))
{ {
/* we only expose the linear progression of the fog in /* we only expose the linear progression of the fog in
* the ClutterStage API, and that ignores the fog density. * the ClutterStage API, and that ignores the fog density.
@ -660,6 +658,7 @@ clutter_stage_paint (ClutterActor *self)
} }
else else
cogl_disable_fog (); cogl_disable_fog ();
#endif
/* this will take care of painting every child */ /* this will take care of painting every child */
CLUTTER_ACTOR_CLASS (clutter_stage_parent_class)->paint (self); CLUTTER_ACTOR_CLASS (clutter_stage_parent_class)->paint (self);
@ -1791,15 +1790,13 @@ clutter_stage_class_init (ClutterStageClass *klass)
* *
* Whether the stage should be rendered in an offscreen buffer. * Whether the stage should be rendered in an offscreen buffer.
* *
* <warning><para>Not every backend supports redirecting the * Deprecated: 1.10: This property does not do anything.
* stage to an offscreen buffer. This property might not work
* and it might be deprecated at any later date.</para></warning>
*/ */
pspec = g_param_spec_boolean ("offscreen", pspec = g_param_spec_boolean ("offscreen",
P_("Offscreen"), P_("Offscreen"),
P_("Whether the main stage should be rendered offscreen"), P_("Whether the main stage should be rendered offscreen"),
FALSE, FALSE,
CLUTTER_PARAM_READWRITE); CLUTTER_PARAM_READWRITE | G_PARAM_DEPRECATED);
g_object_class_install_property (gobject_class, g_object_class_install_property (gobject_class,
PROP_OFFSCREEN, PROP_OFFSCREEN,
pspec); pspec);
@ -1882,12 +1879,14 @@ clutter_stage_class_init (ClutterStageClass *klass)
* actors farther from the viewpoint. * actors farther from the viewpoint.
* *
* Since: 0.6 * Since: 0.6
*
* Deprecated: 1.10: This property does not do anything.
*/ */
pspec = g_param_spec_boolean ("use-fog", pspec = g_param_spec_boolean ("use-fog",
P_("Use Fog"), P_("Use Fog"),
P_("Whether to enable depth cueing"), P_("Whether to enable depth cueing"),
FALSE, FALSE,
CLUTTER_PARAM_READWRITE); CLUTTER_PARAM_READWRITE | G_PARAM_DEPRECATED);
g_object_class_install_property (gobject_class, PROP_USE_FOG, pspec); g_object_class_install_property (gobject_class, PROP_USE_FOG, pspec);
/** /**
@ -1897,12 +1896,14 @@ clutter_stage_class_init (ClutterStageClass *klass)
* is set to %TRUE * is set to %TRUE
* *
* Since: 1.0 * Since: 1.0
*
* Deprecated: 1.10: This property does not do anything.
*/ */
pspec = g_param_spec_boxed ("fog", pspec = g_param_spec_boxed ("fog",
P_("Fog"), P_("Fog"),
P_("Settings for the depth cueing"), P_("Settings for the depth cueing"),
CLUTTER_TYPE_FOG, CLUTTER_TYPE_FOG,
CLUTTER_PARAM_READWRITE); CLUTTER_PARAM_READWRITE | G_PARAM_DEPRECATED);
g_object_class_install_property (gobject_class, PROP_FOG, pspec); g_object_class_install_property (gobject_class, PROP_FOG, pspec);
/** /**
@ -2162,7 +2163,7 @@ clutter_stage_init (ClutterStage *self)
geom.height); geom.height);
/* depth cueing */ /* FIXME - remove for 2.0 */
priv->fog.z_near = 1.0; priv->fog.z_near = 1.0;
priv->fog.z_far = 2.0; priv->fog.z_far = 2.0;
@ -3019,6 +3020,8 @@ clutter_stage_get_key_focus (ClutterStage *stage)
* Return value: %TRUE if the depth cueing effect is enabled * Return value: %TRUE if the depth cueing effect is enabled
* *
* Since: 0.6 * Since: 0.6
*
* Deprecated: 1.10: This function will always return %FALSE
*/ */
gboolean gboolean
clutter_stage_get_use_fog (ClutterStage *stage) clutter_stage_get_use_fog (ClutterStage *stage)
@ -3043,11 +3046,14 @@ clutter_stage_get_use_fog (ClutterStage *stage)
* clutter_stage_set_fog() function. * clutter_stage_set_fog() function.
* *
* Since: 0.6 * Since: 0.6
*
* Deprecated: 1.10: Calling this function produces no visible effect
*/ */
void void
clutter_stage_set_use_fog (ClutterStage *stage, clutter_stage_set_use_fog (ClutterStage *stage,
gboolean fog) gboolean fog)
{ {
#if 0
ClutterStagePrivate *priv; ClutterStagePrivate *priv;
g_return_if_fail (CLUTTER_IS_STAGE (stage)); g_return_if_fail (CLUTTER_IS_STAGE (stage));
@ -3065,6 +3071,7 @@ clutter_stage_set_use_fog (ClutterStage *stage,
g_object_notify (G_OBJECT (stage), "use-fog"); g_object_notify (G_OBJECT (stage), "use-fog");
} }
#endif
} }
/** /**
@ -3122,11 +3129,14 @@ clutter_stage_set_use_fog (ClutterStage *stage,
* depend on fragment shaders.</note> * depend on fragment shaders.</note>
* *
* Since: 0.6 * Since: 0.6
*
* Deprecated: 1.10: Fog settings are ignored.
*/ */
void void
clutter_stage_set_fog (ClutterStage *stage, clutter_stage_set_fog (ClutterStage *stage,
ClutterFog *fog) ClutterFog *fog)
{ {
#if 0
ClutterStagePrivate *priv; ClutterStagePrivate *priv;
g_return_if_fail (CLUTTER_IS_STAGE (stage)); g_return_if_fail (CLUTTER_IS_STAGE (stage));
@ -3138,6 +3148,7 @@ clutter_stage_set_fog (ClutterStage *stage,
if (priv->use_fog) if (priv->use_fog)
clutter_actor_queue_redraw (CLUTTER_ACTOR (stage)); clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
#endif
} }
/** /**
@ -3148,6 +3159,9 @@ clutter_stage_set_fog (ClutterStage *stage,
* Retrieves the current depth cueing settings from the stage. * Retrieves the current depth cueing settings from the stage.
* *
* Since: 0.6 * Since: 0.6
*
* Deprecated: 1.10: This function will always return the default
* values of #ClutterFog
*/ */
void void
clutter_stage_get_fog (ClutterStage *stage, clutter_stage_get_fog (ClutterStage *stage,

139
clutter/clutter-stage.h
View File

@ -142,89 +142,76 @@ struct _ClutterFog
gfloat z_far; gfloat z_far;
}; };
GType clutter_perspective_get_type (void) G_GNUC_CONST; GType clutter_perspective_get_type (void) G_GNUC_CONST;
GType clutter_fog_get_type (void) G_GNUC_CONST; GType clutter_fog_get_type (void) G_GNUC_CONST;
GType clutter_stage_get_type (void) G_GNUC_CONST; GType clutter_stage_get_type (void) G_GNUC_CONST;
ClutterActor *clutter_stage_new (void); ClutterActor * clutter_stage_new (void);
void clutter_stage_set_color (ClutterStage *stage, void clutter_stage_set_color (ClutterStage *stage,
const ClutterColor *color); const ClutterColor *color);
void clutter_stage_get_color (ClutterStage *stage, void clutter_stage_get_color (ClutterStage *stage,
ClutterColor *color); ClutterColor *color);
void clutter_stage_set_perspective (ClutterStage *stage, void clutter_stage_set_perspective (ClutterStage *stage,
ClutterPerspective *perspective); ClutterPerspective *perspective);
void clutter_stage_get_perspective (ClutterStage *stage, void clutter_stage_get_perspective (ClutterStage *stage,
ClutterPerspective *perspective); ClutterPerspective *perspective);
void clutter_stage_set_fullscreen (ClutterStage *stage, void clutter_stage_set_fullscreen (ClutterStage *stage,
gboolean fullscreen); gboolean fullscreen);
gboolean clutter_stage_get_fullscreen (ClutterStage *stage); gboolean clutter_stage_get_fullscreen (ClutterStage *stage);
void clutter_stage_show_cursor (ClutterStage *stage); void clutter_stage_show_cursor (ClutterStage *stage);
void clutter_stage_hide_cursor (ClutterStage *stage); void clutter_stage_hide_cursor (ClutterStage *stage);
void clutter_stage_set_title (ClutterStage *stage,
const gchar *title);
const gchar * clutter_stage_get_title (ClutterStage *stage);
void clutter_stage_set_user_resizable (ClutterStage *stage,
gboolean resizable);
gboolean clutter_stage_get_user_resizable (ClutterStage *stage);
ClutterActor *clutter_stage_get_actor_at_pos (ClutterStage *stage, void clutter_stage_set_minimum_size (ClutterStage *stage,
ClutterPickMode pick_mode, guint width,
gint x, guint height);
gint y); void clutter_stage_get_minimum_size (ClutterStage *stage,
guchar * clutter_stage_read_pixels (ClutterStage *stage, guint *width,
gint x, guint *height);
gint y, void clutter_stage_set_no_clear_hint (ClutterStage *stage,
gint width, gboolean no_clear);
gint height); gboolean clutter_stage_get_no_clear_hint (ClutterStage *stage);
gboolean clutter_stage_event (ClutterStage *stage, void clutter_stage_set_use_alpha (ClutterStage *stage,
ClutterEvent *event); gboolean use_alpha);
gboolean clutter_stage_get_use_alpha (ClutterStage *stage);
void clutter_stage_set_title (ClutterStage *stage, void clutter_stage_set_key_focus (ClutterStage *stage,
const gchar *title); ClutterActor *actor);
const gchar * clutter_stage_get_title (ClutterStage *stage); ClutterActor * clutter_stage_get_key_focus (ClutterStage *stage);
void clutter_stage_set_user_resizable (ClutterStage *stage, void clutter_stage_set_throttle_motion_events (ClutterStage *stage,
gboolean resizable); gboolean throttle);
gboolean clutter_stage_get_user_resizable (ClutterStage *stage); gboolean clutter_stage_get_throttle_motion_events (ClutterStage *stage);
void clutter_stage_set_use_fog (ClutterStage *stage, void clutter_stage_set_motion_events_enabled (ClutterStage *stage,
gboolean fog); gboolean enabled);
gboolean clutter_stage_get_use_fog (ClutterStage *stage); gboolean clutter_stage_get_motion_events_enabled (ClutterStage *stage);
void clutter_stage_set_fog (ClutterStage *stage, void clutter_stage_set_accept_focus (ClutterStage *stage,
ClutterFog *fog); gboolean accept_focus);
void clutter_stage_get_fog (ClutterStage *stage, gboolean clutter_stage_get_accept_focus (ClutterStage *stage);
ClutterFog *fog); gboolean clutter_stage_event (ClutterStage *stage,
ClutterEvent *event);
void clutter_stage_set_key_focus (ClutterStage *stage, ClutterActor * clutter_stage_get_actor_at_pos (ClutterStage *stage,
ClutterActor *actor); ClutterPickMode pick_mode,
ClutterActor * clutter_stage_get_key_focus (ClutterStage *stage); gint x,
void clutter_stage_ensure_current (ClutterStage *stage); gint y);
void clutter_stage_ensure_viewport (ClutterStage *stage); guchar * clutter_stage_read_pixels (ClutterStage *stage,
void clutter_stage_ensure_redraw (ClutterStage *stage); gint x,
gint y,
gint width,
gint height);
void clutter_stage_set_throttle_motion_events (ClutterStage *stage, void clutter_stage_get_redraw_clip_bounds (ClutterStage *stage,
gboolean throttle); cairo_rectangle_int_t *clip);
gboolean clutter_stage_get_throttle_motion_events (ClutterStage *stage);
void clutter_stage_set_use_alpha (ClutterStage *stage, void clutter_stage_ensure_current (ClutterStage *stage);
gboolean use_alpha); void clutter_stage_ensure_viewport (ClutterStage *stage);
gboolean clutter_stage_get_use_alpha (ClutterStage *stage); void clutter_stage_ensure_redraw (ClutterStage *stage);
void clutter_stage_set_minimum_size (ClutterStage *stage,
guint width,
guint height);
void clutter_stage_get_minimum_size (ClutterStage *stage,
guint *width,
guint *height);
void clutter_stage_set_no_clear_hint (ClutterStage *stage,
gboolean no_clear);
gboolean clutter_stage_get_no_clear_hint (ClutterStage *stage);
void clutter_stage_set_accept_focus (ClutterStage *stage,
gboolean accept_focus);
gboolean clutter_stage_get_accept_focus (ClutterStage *stage);
void clutter_stage_get_redraw_clip_bounds (ClutterStage *stage,
cairo_rectangle_int_t *clip);
void clutter_stage_set_motion_events_enabled (ClutterStage *stage,
gboolean enabled);
gboolean clutter_stage_get_motion_events_enabled (ClutterStage *stage);
G_END_DECLS G_END_DECLS

14
clutter/deprecated/clutter-stage.h
View File

@ -49,6 +49,20 @@ gboolean clutter_stage_is_default (ClutterStage *stage);
CLUTTER_DEPRECATED_FOR(clutter_actor_queue_redraw) CLUTTER_DEPRECATED_FOR(clutter_actor_queue_redraw)
void clutter_stage_queue_redraw (ClutterStage *stage); void clutter_stage_queue_redraw (ClutterStage *stage);
CLUTTER_DEPRECATED
void clutter_stage_set_use_fog (ClutterStage *stage,
gboolean fog);
CLUTTER_DEPRECATED
gboolean clutter_stage_get_use_fog (ClutterStage *stage);
CLUTTER_DEPRECATED
void clutter_stage_set_fog (ClutterStage *stage,
ClutterFog *fog);
CLUTTER_DEPRECATED
void clutter_stage_get_fog (ClutterStage *stage,
ClutterFog *fog);
G_END_DECLS G_END_DECLS
#endif /* __CLUTTER_STAGE_DEPRECATED_H__ */ #endif /* __CLUTTER_STAGE_DEPRECATED_H__ */