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annotate acinclude/ltsugar.m4 @ 5172:ededa1ccf91c

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Switched the SDL 1.2 compatibility to use the window surface, so it's fast even when there's no hardware acceleration available. This means that the YUV overlay now uses software, but that's okay since fast YUV code should be using the textures now anyway.
author Sam Lantinga <slouken@libsdl.org>
date Thu, 03 Feb 2011 21:13:55 -0800
parents 3da232c5980a
children
rev   line source
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1 ##############################################################################
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2 # ltsugar.m4 -- libtool m4 base layer. -*-Autoconf-*-
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3 #
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4 # Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
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5 # Written by Gary V. Vaughan, 2004
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6 #
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7 # This file is free software; the Free Software Foundation gives
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8 # unlimited permission to copy and/or distribute it, with or without
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9 # modifications, as long as this notice is preserved.
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10
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11 # serial 6 ltsugar.m4
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12
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13 # This is to help aclocal find these macros, as it can't see m4_define.
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14 AC_DEFUN([LTSUGAR_VERSION], [m4_if([0.1])])
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15
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16
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17 # lt_join(SEP, ARG1, [ARG2...])
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18 # -----------------------------
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19 # Produce ARG1SEPARG2...SEPARGn, omitting [] arguments and their
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20 # associated separator.
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21 # Needed until we can rely on m4_join from Autoconf 2.62, since all earlier
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22 # versions in m4sugar had bugs.
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23 m4_define([lt_join],
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24 [m4_if([$#], [1], [],
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25 [$#], [2], [[$2]],
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26 [m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift(m4_shift($@)))])])
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27 m4_define([_lt_join],
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28 [m4_if([$#$2], [2], [],
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29 [m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift(m4_shift($@)))])])
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30
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31
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32 # lt_car(LIST)
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33 # lt_cdr(LIST)
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34 # ------------
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35 # Manipulate m4 lists.
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36 # These macros are necessary as long as will still need to support
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37 # Autoconf-2.59 which quotes differently.
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38 m4_define([lt_car], [[$1]])
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39 m4_define([lt_cdr],
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40 [m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
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41 [$#], 1, [],
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42 [m4_dquote(m4_shift($@))])])
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43 m4_define([lt_unquote], $1)
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44
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45
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46 # lt_append(MACRO-NAME, STRING, [SEPARATOR])
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47 # ------------------------------------------
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48 # Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'.
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49 # Note that neither SEPARATOR nor STRING are expanded; they are appended
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50 # to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked).
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51 # No SEPARATOR is output if MACRO-NAME was previously undefined (different
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52 # than defined and empty).
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53 #
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54 # This macro is needed until we can rely on Autoconf 2.62, since earlier
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55 # versions of m4sugar mistakenly expanded SEPARATOR but not STRING.
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56 m4_define([lt_append],
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57 [m4_define([$1],
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58 m4_ifdef([$1], [m4_defn([$1])[$3]])[$2])])
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59
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60
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61
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62 # lt_combine(SEP, PREFIX-LIST, INFIX, SUFFIX1, [SUFFIX2...])
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63 # ----------------------------------------------------------
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64 # Produce a SEP delimited list of all paired combinations of elements of
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65 # PREFIX-LIST with SUFFIX1 through SUFFIXn. Each element of the list
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66 # has the form PREFIXmINFIXSUFFIXn.
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67 # Needed until we can rely on m4_combine added in Autoconf 2.62.
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68 m4_define([lt_combine],
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69 [m4_if(m4_eval([$# > 3]), [1],
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70 [m4_pushdef([_Lt_sep], [m4_define([_Lt_sep], m4_defn([lt_car]))])]]dnl
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71 [[m4_foreach([_Lt_prefix], [$2],
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72 [m4_foreach([_Lt_suffix],
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73 ]m4_dquote(m4_dquote(m4_shift(m4_shift(m4_shift($@)))))[,
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74 [_Lt_sep([$1])[]m4_defn([_Lt_prefix])[$3]m4_defn([_Lt_suffix])])])])])
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75
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76
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77 # lt_if_append_uniq(MACRO-NAME, VARNAME, [SEPARATOR], [UNIQ], [NOT-UNIQ])
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78 # -----------------------------------------------------------------------
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79 # Iff MACRO-NAME does not yet contain VARNAME, then append it (delimited
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80 # by SEPARATOR if supplied) and expand UNIQ, else NOT-UNIQ.
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81 m4_define([lt_if_append_uniq],
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82 [m4_ifdef([$1],
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83 [m4_if(m4_index([$3]m4_defn([$1])[$3], [$3$2$3]), [-1],
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84 [lt_append([$1], [$2], [$3])$4],
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85 [$5])],
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86 [lt_append([$1], [$2], [$3])$4])])
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87
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88
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89 # lt_dict_add(DICT, KEY, VALUE)
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90 # -----------------------------
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91 m4_define([lt_dict_add],
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92 [m4_define([$1($2)], [$3])])
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93
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94
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95 # lt_dict_add_subkey(DICT, KEY, SUBKEY, VALUE)
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96 # --------------------------------------------
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97 m4_define([lt_dict_add_subkey],
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98 [m4_define([$1($2:$3)], [$4])])
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99
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100
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101 # lt_dict_fetch(DICT, KEY, [SUBKEY])
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102 # ----------------------------------
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103 m4_define([lt_dict_fetch],
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104 [m4_ifval([$3],
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105 m4_ifdef([$1($2:$3)], [m4_defn([$1($2:$3)])]),
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106 m4_ifdef([$1($2)], [m4_defn([$1($2)])]))])
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107
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108
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109 # lt_if_dict_fetch(DICT, KEY, [SUBKEY], VALUE, IF-TRUE, [IF-FALSE])
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110 # -----------------------------------------------------------------
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111 m4_define([lt_if_dict_fetch],
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112 [m4_if(lt_dict_fetch([$1], [$2], [$3]), [$4],
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113 [$5],
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114 [$6])])
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115
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116
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117 # lt_dict_filter(DICT, [SUBKEY], VALUE, [SEPARATOR], KEY, [...])
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118 # --------------------------------------------------------------
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119 m4_define([lt_dict_filter],
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120 [m4_if([$5], [], [],
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121 [lt_join(m4_quote(m4_default([$4], [[, ]])),
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122 lt_unquote(m4_split(m4_normalize(m4_foreach(_Lt_key, lt_car([m4_shiftn(4, $@)]),
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123 [lt_if_dict_fetch([$1], _Lt_key, [$2], [$3], [_Lt_key ])])))))])[]dnl
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124 ])
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125