4f6fe6f0e2
This fixes some problems which were stopping --disable-glib from working properly: • A lot of the public headers were including glib.h. This shouldn't be necessary because the API doesn't expose any glib types. Otherwise any apps would require glib in order to get the header. • The public headers were using G_BEGIN_DECLS. There is now a replacement macro called COGL_BEGIN_DECLS which is defined in cogl-types.h. • A similar fix has been done for G_GNUC_NULL_TERMINATED and G_GNUC_DEPRECATED. • The CFLAGS were not including $(builddir)/deps/glib which was preventing it finding the generated glibconfig.h when building out of tree. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 4138b3141c2f39cddaea3d72bfc04342ed5092d0)
125 lines
4.6 KiB
C
125 lines
4.6 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2011 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*
|
|
* Authors:
|
|
* Neil Roberts <neil@linux.intel.com>
|
|
*/
|
|
|
|
#ifndef __COGL_FLAGS_H
|
|
#define __COGL_FLAGS_H
|
|
|
|
#include <glib.h>
|
|
|
|
#include "cogl-util.h"
|
|
|
|
COGL_BEGIN_DECLS
|
|
|
|
/* These are macros used to implement a fixed-size array of bits. This
|
|
should be used instead of CoglBitmask when the maximum bit number
|
|
that will be set is known at compile time, for example when setting
|
|
for recording a set of known available features */
|
|
|
|
/* The bits are stored in an array of unsigned longs. To use these
|
|
macros, you would typically have an enum defining the available
|
|
bits with an extra last enum to define the maximum value. Then to
|
|
store the flags you would declare an array of unsigned longs sized
|
|
using COGL_FLAGS_N_LONGS_FOR_SIZE, eg:
|
|
|
|
typedef enum { FEATURE_A, FEATURE_B, FEATURE_C, N_FEATURES } Features;
|
|
|
|
unsigned long feature_flags[COGL_FLAGS_N_LONGS_FOR_SIZE (N_FEATURES)];
|
|
*/
|
|
|
|
#define COGL_FLAGS_N_LONGS_FOR_SIZE(size) \
|
|
(((size) + \
|
|
(sizeof (unsigned long) * 8 - 1)) \
|
|
/ (sizeof (unsigned long) * 8))
|
|
|
|
/* @flag is expected to be constant so these should result in a
|
|
constant expression. This means that setting a flag is equivalent
|
|
to just setting in a bit in a global variable at a known
|
|
location */
|
|
#define COGL_FLAGS_GET_INDEX(flag) \
|
|
((flag) / (sizeof (unsigned long) * 8))
|
|
#define COGL_FLAGS_GET_MASK(flag) \
|
|
(1UL << ((unsigned long) (flag) & \
|
|
(sizeof (unsigned long) * 8 - 1)))
|
|
|
|
#define COGL_FLAGS_GET(array, flag) \
|
|
(!!((array)[COGL_FLAGS_GET_INDEX (flag)] & \
|
|
COGL_FLAGS_GET_MASK (flag)))
|
|
|
|
/* The expectation here is that @value will be constant so the if
|
|
statement will be optimised out */
|
|
#define COGL_FLAGS_SET(array, flag, value) \
|
|
G_STMT_START { \
|
|
if (value) \
|
|
((array)[COGL_FLAGS_GET_INDEX (flag)] |= \
|
|
COGL_FLAGS_GET_MASK (flag)); \
|
|
else \
|
|
((array)[COGL_FLAGS_GET_INDEX (flag)] &= \
|
|
~COGL_FLAGS_GET_MASK (flag)); \
|
|
} G_STMT_END
|
|
|
|
/* Macros to help iterate an array of flags. It should be used like
|
|
* this:
|
|
*
|
|
* int n_longs = COGL_FLAGS_N_LONGS_FOR_SIZE (...);
|
|
* unsigned long flags[n_longs];
|
|
* int bit_num;
|
|
*
|
|
* COGL_FLAGS_FOREACH_START (flags, n_longs, bit_num)
|
|
* {
|
|
* do_something_with_the_bit (bit_num);
|
|
* }
|
|
* COGL_FLAGS_FOREACH_END;
|
|
*/
|
|
#define COGL_FLAGS_FOREACH_START(array, n_longs, bit) \
|
|
G_STMT_START { \
|
|
const unsigned long *_p = (array); \
|
|
int _n_longs = (n_longs); \
|
|
int _i; \
|
|
\
|
|
for (_i = 0; _i < _n_longs; _i++) \
|
|
{ \
|
|
unsigned long _mask = *(_p++); \
|
|
\
|
|
(bit) = _i * sizeof (unsigned long) * 8 - 1; \
|
|
\
|
|
while (_mask) \
|
|
{ \
|
|
int _next_bit = _cogl_util_ffsl (_mask); \
|
|
(bit) += _next_bit; \
|
|
/* This odd two-part shift is to avoid */ \
|
|
/* shifting by sizeof (long)*8 which has */ \
|
|
/* undefined results according to the */ \
|
|
/* C spec (and seems to be a no-op in */ \
|
|
/* practice) */ \
|
|
_mask = (_mask >> (_next_bit - 1)) >> 1; \
|
|
|
|
#define COGL_FLAGS_FOREACH_END \
|
|
} } } G_STMT_END
|
|
|
|
COGL_END_DECLS
|
|
|
|
#endif /* __COGL_FLAGS_H */
|
|
|