52811b240f
The fog and perspective API is currently split in two parts: - the floating point version, using values - the fixed point version, using structures The relative properties are using the structure types, since they are meant to set multiple values at the same time. Instead of using bare values, the whole API should be coalesced into two simple calls using structures to match the GObject properties. Thus: clutter_stage_set_fog (ClutterStage*, const ClutterFog*) clutter_stage_get_fog (ClutterStage*, ClutterFog*) clutter_stage_set_perspective (ClutterStage*, const ClutterPerspective*) clutter_stage_get_perspective (ClutterStage*, ClutterPerspective*) Which supercedes the fixed point and floating point variants. More importantly, both ClutterFog and ClutterPerspective should using floating point values, since that's what get passed to COGL anyway. ClutterFog should also drop the "density" member, since ClutterStage only allows linear fog; non-linear fog distribution can be achieved using a signal handler and calling cogl_set_fog() directly; this keeps the API compact yet extensible. Finally, there is no ClutterStage:fog so it should be added.
225 lines
8.0 KiB
C
225 lines
8.0 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#ifndef __CLUTTER_STAGE_H__
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#define __CLUTTER_STAGE_H__
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#include <clutter/clutter-types.h>
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#include <clutter/clutter-group.h>
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#include <clutter/clutter-color.h>
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#include <clutter/clutter-event.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_PERSPECTIVE (clutter_perspective_get_type ())
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#define CLUTTER_TYPE_FOG (clutter_fog_get_type ())
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#define CLUTTER_TYPE_STAGE (clutter_stage_get_type())
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#define CLUTTER_STAGE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), \
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CLUTTER_TYPE_STAGE, ClutterStage))
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#define CLUTTER_STAGE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), \
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CLUTTER_TYPE_STAGE, ClutterStageClass))
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#define CLUTTER_IS_STAGE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
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CLUTTER_TYPE_STAGE))
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#define CLUTTER_IS_STAGE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), \
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CLUTTER_TYPE_STAGE))
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#define CLUTTER_STAGE_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj), \
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CLUTTER_TYPE_STAGE, ClutterStageClass))
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/**
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* CLUTTER_STAGE_WIDTH:
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*
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* Macro that evaluates to the width of the default stage
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*
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* Since: 0.2
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*/
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#define CLUTTER_STAGE_WIDTH() \
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(clutter_actor_get_width (clutter_stage_get_default ()))
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/**
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* CLUTTER_STAGE_HEIGHT:
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*
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* Macro that evaluates to the height of the default stage
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*
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* Since: 0.2
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*/
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#define CLUTTER_STAGE_HEIGHT() \
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(clutter_actor_get_height (clutter_stage_get_default ()))
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typedef struct _ClutterPerspective ClutterPerspective;
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typedef struct _ClutterFog ClutterFog;
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typedef struct _ClutterStageClass ClutterStageClass;
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typedef struct _ClutterStagePrivate ClutterStagePrivate;
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struct _ClutterStage
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{
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/*< private >*/
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ClutterGroup parent_instance;
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ClutterStagePrivate *priv;
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};
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struct _ClutterStageClass
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{
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/*< private >*/
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ClutterGroupClass parent_class;
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/*< public >*/
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/* signals */
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void (* fullscreen) (ClutterStage *stage);
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void (* unfullscreen) (ClutterStage *stage);
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void (* activate) (ClutterStage *stage);
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void (* deactivate) (ClutterStage *stage);
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void (* queue_redraw) (ClutterStage *stage);
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/*< private >*/
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/* padding for future expansion */
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gpointer _padding_dummy[32];
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};
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/**
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* ClutterPerspective:
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* @fovy: the field of view angle, in degrees, in the y direction
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* @aspect: the aspect ratio that determines the field of view in the x
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* direction. The aspect ratio is the ratio of x (width) to y (height)
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* @z_near: the distance from the viewer to the near clipping
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* plane (always positive)
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* @z_far: the distance from the viewer to the far clipping
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* plane (always positive)
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*
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* Stage perspective definition. #ClutterPerspective is only used by
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* the fixed point version of clutter_stage_set_perspective().
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*
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* Since: 0.4
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*/
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struct _ClutterPerspective
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{
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gfloat fovy;
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gfloat aspect;
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gfloat z_near;
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gfloat z_far;
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};
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/**
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* ClutterFog:
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* @z_near: starting distance from the viewer to the near clipping
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* plane (always positive)
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* @z_far: final distance from the viewer to the far clipping
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* plane (always positive)
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*
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* Fog settings used to create the depth cueing effect.
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*
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* Since: 0.6
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*/
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struct _ClutterFog
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{
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gfloat z_near;
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gfloat z_far;
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};
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GType clutter_perspective_get_type (void) G_GNUC_CONST;
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GType clutter_fog_get_type (void) G_GNUC_CONST;
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GType clutter_stage_get_type (void) G_GNUC_CONST;
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ClutterActor *clutter_stage_get_default (void);
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ClutterActor *clutter_stage_new (void);
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void clutter_stage_set_color (ClutterStage *stage,
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const ClutterColor *color);
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void clutter_stage_get_color (ClutterStage *stage,
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ClutterColor *color);
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void clutter_stage_set_perspective (ClutterStage *stage,
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ClutterPerspective *perspective);
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void clutter_stage_get_perspective (ClutterStage *stage,
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ClutterPerspective *perspective);
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void clutter_stage_fullscreen (ClutterStage *stage);
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void clutter_stage_unfullscreen (ClutterStage *stage);
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void clutter_stage_show_cursor (ClutterStage *stage);
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void clutter_stage_hide_cursor (ClutterStage *stage);
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ClutterActor *clutter_stage_get_actor_at_pos (ClutterStage *stage,
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gint x,
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gint y);
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guchar * clutter_stage_read_pixels (ClutterStage *stage,
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gint x,
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gint y,
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gint width,
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gint height);
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gboolean clutter_stage_event (ClutterStage *stage,
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ClutterEvent *event);
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void clutter_stage_set_title (ClutterStage *stage,
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const gchar *title);
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G_CONST_RETURN gchar *clutter_stage_get_title (ClutterStage *stage);
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void clutter_stage_set_user_resizable (ClutterStage *stage,
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gboolean resizable);
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gboolean clutter_stage_get_user_resizable (ClutterStage *stage);
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void clutter_stage_set_use_fog (ClutterStage *stage,
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gboolean fog);
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gboolean clutter_stage_get_use_fog (ClutterStage *stage);
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void clutter_stage_set_fog (ClutterStage *stage,
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ClutterFog *fog);
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void clutter_stage_get_fog (ClutterStage *stage,
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ClutterFog *fog);
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void clutter_stage_set_key_focus (ClutterStage *stage,
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ClutterActor *actor);
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ClutterActor * clutter_stage_get_key_focus (ClutterStage *stage);
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/* New experiental calls */
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void clutter_stage_ensure_current (ClutterStage *stage);
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void clutter_stage_queue_redraw (ClutterStage *stage);
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gboolean clutter_stage_is_default (ClutterStage *stage);
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void clutter_stage_ensure_viewport (ClutterStage *stage);
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/* Commodity macro */
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#define clutter_stage_add(stage,actor) G_STMT_START { \
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if (CLUTTER_IS_STAGE ((stage)) && CLUTTER_IS_ACTOR ((actor))) \
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{ \
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ClutterContainer *_container = (ClutterContainer *) (stage); \
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ClutterActor *_actor = (ClutterActor *) (actor); \
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clutter_container_add_actor (_container, _actor); \
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} } G_STMT_END
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G_END_DECLS
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#endif /* __CLUTTER_STAGE_H__ */
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