8b995a9457
This is used as an alternative to calling clutter_shader_effect_set_shader_source. A ClutterShaderEffect subclass is now expected to implement this method to return the source for the effect that will be used for all instances of this subclass. It is only called once regardless of the number of instances created. That way Clutter can avoid recompiling the shader source for every new instance of the effect. https://bugzilla.gnome.org/show_bug.cgi?id=660512 Reviewed-by: Emmanuele Bassi <ebassi@linux.intel.com>
115 lines
4.4 KiB
C
115 lines
4.4 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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* Copyright (C) 2010 Intel Corporation.
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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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* Author:
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* Emmanuele Bassi <ebassi@linux.intel.com>
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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_SHADER_EFFECT_H__
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#define __CLUTTER_SHADER_EFFECT_H__
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#include <clutter/clutter-offscreen-effect.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_SHADER_EFFECT (clutter_shader_effect_get_type ())
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#define CLUTTER_SHADER_EFFECT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_SHADER_EFFECT, ClutterShaderEffect))
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#define CLUTTER_IS_SHADER_EFFECT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_SHADER_EFFECT))
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#define CLUTTER_SHADER_EFFECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_SHADER_EFFECT, ClutterShaderEffectClass))
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#define CLUTTER_IS_SHADER_EFFECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_SHADER_EFFECT))
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#define CLUTTER_SHADER_EFFECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_SHADER_EFFECT, ClutterShaderEffectClass))
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typedef struct _ClutterShaderEffect ClutterShaderEffect;
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typedef struct _ClutterShaderEffectPrivate ClutterShaderEffectPrivate;
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typedef struct _ClutterShaderEffectClass ClutterShaderEffectClass;
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/**
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* ClutterShaderEffect:
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*
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* The <structname>ClutterShaderEffect</structname> structure contains
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* only private data and should be accessed using the provided API
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*
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* Since: 1.4
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*/
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struct _ClutterShaderEffect
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{
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/*< private >*/
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ClutterOffscreenEffect parent_instance;
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ClutterShaderEffectPrivate *priv;
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};
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/**
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* ClutterShaderEffectClass:
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* @get_static_shader_source: Returns the GLSL source code to use for
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* instances of this shader effect. Note that this function is only
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* called once per subclass of #ClutterShaderEffect regardless of how
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* many instances are used. It is expected that subclasses will return
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* a copy of a static string from this function.
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*
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* The <structname>ClutterShaderEffectClass</structname> structure contains
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* only private data
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*
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* Since: 1.4
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*/
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struct _ClutterShaderEffectClass
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{
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/*< private >*/
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ClutterOffscreenEffectClass parent_class;
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/*< public >*/
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gchar * (* get_static_shader_source) (ClutterShaderEffect *effect);
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/*< private >*/
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/* padding */
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void (*_clutter_shader1) (void);
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void (*_clutter_shader2) (void);
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void (*_clutter_shader3) (void);
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void (*_clutter_shader4) (void);
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void (*_clutter_shader5) (void);
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};
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GType clutter_shader_effect_get_type (void) G_GNUC_CONST;
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ClutterEffect * clutter_shader_effect_new (ClutterShaderType shader_type);
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gboolean clutter_shader_effect_set_shader_source (ClutterShaderEffect *effect,
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const gchar *source);
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void clutter_shader_effect_set_uniform (ClutterShaderEffect *effect,
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const gchar *name,
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GType gtype,
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gsize n_values,
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...);
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void clutter_shader_effect_set_uniform_value (ClutterShaderEffect *effect,
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const gchar *name,
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const GValue *value);
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CoglHandle clutter_shader_effect_get_shader (ClutterShaderEffect *effect);
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CoglHandle clutter_shader_effect_get_program (ClutterShaderEffect *effect);
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G_END_DECLS
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#endif /* __CLUTTER_SHADER_EFFECT_H__ */
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