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f6feed4386
The ClutterParamSpecFixed constructor is declared in the header as taking ClutterFixed values, but the implementation takes ClutterUnit values instead. This obviously works because fixed and units are exactly the same type. This commit fixes the wrong parameters.
369 lines
9.9 KiB
C
369 lines
9.9 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 Tomas Frydrych <tf@openedhand.com>
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*
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* Copyright (C) 2006, 2007 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#define G_IMPLEMENT_INLINES
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <glib-object.h>
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#include <gobject/gvaluecollector.h>
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#include "clutter-fixed.h"
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#include "clutter-private.h"
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/**
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* SECTION:clutter-fixed
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* @short_description: Fixed Point API
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*
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* Clutter has a fixed point API targeted at platforms without a
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* floating point unit, such as embedded devices. On such platforms
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* this API should be preferred to the floating point one as it does
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* not trigger the slow path of software emulation, relying on integer
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* math for fixed-to-floating and floating-to-fixed conversion.
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*
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* It is no recommened for use on platforms with a floating point unit
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* (eg desktop systems) nor for use in bindings.
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*
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* Basic rules of Fixed Point arithmethic:
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*
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* <itemizedlist>
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* <listitem>
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* <para>Two fixed point numbers can be directly added,
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* subtracted and have their modulus taken.</para>
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* </listitem>
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* <listitem>
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* <para>To add other numerical type to a fixed point number it has to
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* be first converted to fixed point.</para>
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* </listitem>
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* <listitem>
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* <para>A fixed point number can be directly multiplied or divided by
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* an integer.</para>
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* </listitem>
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* <listitem>
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* <para>Two fixed point numbers can only be multiplied and divided by the
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* provided %CLUTTER_FIXED_MUL and %CLUTTER_FIXED_DIV macros.</para>
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* </listitem>
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* </itemizedlist>
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*/
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static GTypeInfo _info = {
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0,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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0,
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0,
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NULL,
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NULL,
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};
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static GTypeFundamentalInfo _finfo = { 0, };
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static void
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clutter_value_init_fixed (GValue *value)
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{
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value->data[0].v_int = 0;
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}
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static void
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clutter_value_copy_fixed (const GValue *src,
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GValue *dest)
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{
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dest->data[0].v_int = src->data[0].v_int;
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}
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static gchar *
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clutter_value_collect_fixed (GValue *value,
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guint n_collect_values,
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GTypeCValue *collect_values,
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guint collect_flags)
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{
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value->data[0].v_int = collect_values[0].v_int;
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return NULL;
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}
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static gchar *
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clutter_value_lcopy_fixed (const GValue *value,
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guint n_collect_values,
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GTypeCValue *collect_values,
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guint collect_flags)
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{
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gint32 *fixed_p = collect_values[0].v_pointer;
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if (!fixed_p)
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return g_strdup_printf ("value location for `%s' passed as NULL",
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G_VALUE_TYPE_NAME (value));
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*fixed_p = value->data[0].v_int;
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return NULL;
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}
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static void
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clutter_value_transform_fixed_int (const GValue *src,
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GValue *dest)
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{
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dest->data[0].v_int = COGL_FIXED_TO_INT (src->data[0].v_int);
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}
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static void
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clutter_value_transform_fixed_double (const GValue *src,
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GValue *dest)
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{
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dest->data[0].v_double = COGL_FIXED_TO_DOUBLE (src->data[0].v_int);
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}
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static void
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clutter_value_transform_fixed_float (const GValue *src,
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GValue *dest)
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{
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dest->data[0].v_float = COGL_FIXED_TO_FLOAT (src->data[0].v_int);
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}
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static void
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clutter_value_transform_int_fixed (const GValue *src,
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GValue *dest)
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{
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dest->data[0].v_int = COGL_FIXED_FROM_INT (src->data[0].v_int);
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}
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static void
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clutter_value_transform_double_fixed (const GValue *src,
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GValue *dest)
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{
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dest->data[0].v_int = COGL_FIXED_FROM_FLOAT (src->data[0].v_double);
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}
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static void
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clutter_value_transform_float_fixed (const GValue *src,
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GValue *dest)
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{
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dest->data[0].v_int = COGL_FIXED_FROM_FLOAT (src->data[0].v_float);
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}
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static const GTypeValueTable _clutter_fixed_value_table = {
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clutter_value_init_fixed,
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NULL,
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clutter_value_copy_fixed,
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NULL,
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"i",
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clutter_value_collect_fixed,
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"p",
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clutter_value_lcopy_fixed
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};
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GType
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clutter_fixed_get_type (void)
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{
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static GType _clutter_fixed_type = 0;
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if (G_UNLIKELY (_clutter_fixed_type == 0))
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{
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_info.value_table = & _clutter_fixed_value_table;
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_clutter_fixed_type =
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g_type_register_fundamental (g_type_fundamental_next (),
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I_("ClutterFixed"),
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&_info, &_finfo, 0);
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g_value_register_transform_func (_clutter_fixed_type, G_TYPE_INT,
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clutter_value_transform_fixed_int);
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g_value_register_transform_func (G_TYPE_INT, _clutter_fixed_type,
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clutter_value_transform_int_fixed);
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g_value_register_transform_func (_clutter_fixed_type, G_TYPE_FLOAT,
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clutter_value_transform_fixed_float);
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g_value_register_transform_func (G_TYPE_FLOAT, _clutter_fixed_type,
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clutter_value_transform_float_fixed);
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g_value_register_transform_func (_clutter_fixed_type, G_TYPE_DOUBLE,
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clutter_value_transform_fixed_double);
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g_value_register_transform_func (G_TYPE_DOUBLE, _clutter_fixed_type,
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clutter_value_transform_double_fixed);
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}
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return _clutter_fixed_type;
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}
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/**
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* clutter_value_set_fixed:
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* @value: a #GValue initialized to #CLUTTER_TYPE_FIXED
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* @fixed_: the fixed point value to set
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*
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* Sets @value to @fixed_.
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*
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* Since: 0.8
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*/
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void
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clutter_value_set_fixed (GValue *value,
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ClutterFixed fixed_)
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{
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g_return_if_fail (CLUTTER_VALUE_HOLDS_FIXED (value));
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value->data[0].v_int = fixed_;
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}
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/**
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* clutter_value_get_fixed:
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* @value: a #GValue initialized to #CLUTTER_TYPE_FIXED
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*
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* Gets the fixed point value stored inside @value.
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*
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* Return value: the value inside the passed #GValue
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*
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* Since: 0.8
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*/
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ClutterFixed
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clutter_value_get_fixed (const GValue *value)
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{
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g_return_val_if_fail (CLUTTER_VALUE_HOLDS_FIXED (value), 0);
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return value->data[0].v_int;
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}
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static void
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param_fixed_init (GParamSpec *pspec)
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{
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ClutterParamSpecFixed *fspec = CLUTTER_PARAM_SPEC_FIXED (pspec);
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fspec->minimum = COGL_FIXED_MIN;
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fspec->maximum = COGL_FIXED_MAX;
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fspec->default_value = 0;
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}
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static void
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param_fixed_set_default (GParamSpec *pspec,
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GValue *value)
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{
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value->data[0].v_int = CLUTTER_PARAM_SPEC_FIXED (pspec)->default_value;
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}
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static gboolean
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param_fixed_validate (GParamSpec *pspec,
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GValue *value)
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{
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ClutterParamSpecFixed *fspec = CLUTTER_PARAM_SPEC_FIXED (pspec);
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gint oval = COGL_FIXED_TO_INT (value->data[0].v_int);
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gint min, max, val;
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g_assert (CLUTTER_IS_PARAM_SPEC_FIXED (pspec));
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/* we compare the integer part of the value because the minimum
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* and maximum values cover just that part of the representation
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*/
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min = fspec->minimum;
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max = fspec->maximum;
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val = COGL_FIXED_TO_INT (value->data[0].v_int);
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val = CLAMP (val, min, max);
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if (val != oval)
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{
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value->data[0].v_int = val;
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return TRUE;
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}
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return FALSE;
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}
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static gint
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param_fixed_values_cmp (GParamSpec *pspec,
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const GValue *value1,
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const GValue *value2)
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{
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if (value1->data[0].v_int < value2->data[0].v_int)
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return -1;
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else
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return value1->data[0].v_int > value2->data[0].v_int;
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}
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GType
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clutter_param_fixed_get_type (void)
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{
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static GType pspec_type = 0;
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if (G_UNLIKELY (pspec_type == 0))
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{
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const GParamSpecTypeInfo pspec_info = {
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sizeof (ClutterParamSpecFixed),
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16,
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param_fixed_init,
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CLUTTER_TYPE_FIXED,
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NULL,
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param_fixed_set_default,
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param_fixed_validate,
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param_fixed_values_cmp,
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};
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pspec_type = g_param_type_register_static (I_("ClutterParamSpecFixed"),
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&pspec_info);
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}
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return pspec_type;
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}
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/**
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* clutter_param_spec_fixed:
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* @name: name of the property
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* @nick: short name
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* @blurb: description (can be translatable)
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* @minimum: lower boundary
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* @maximum: higher boundary
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* @default_value: default value
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* @flags: flags for the param spec
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*
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* Creates a #GParamSpec for properties using #ClutterFixed values
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*
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* Return value: the newly created #GParamSpec
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*
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* Since: 0.8
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*/
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GParamSpec *
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clutter_param_spec_fixed (const gchar *name,
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const gchar *nick,
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const gchar *blurb,
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ClutterFixed minimum,
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ClutterFixed maximum,
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ClutterFixed default_value,
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GParamFlags flags)
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{
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ClutterParamSpecFixed *fspec;
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g_return_val_if_fail (default_value >= minimum && default_value <= maximum,
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NULL);
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fspec = g_param_spec_internal (CLUTTER_TYPE_PARAM_FIXED,
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name, nick, blurb,
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flags);
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fspec->minimum = minimum;
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fspec->maximum = maximum;
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fspec->default_value = default_value;
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return G_PARAM_SPEC (fspec);
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}
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