Mercurial > sdl-ios-xcode
annotate COPYING @ 5172:ededa1ccf91c
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 | e1b8e1b97b67 |
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| rev | line source |
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1 GNU LESSER GENERAL PUBLIC LICENSE |
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2 Version 2.1, February 1999 |
| 0 | 3 |
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4 Copyright (C) 1991, 1999 Free Software Foundation, Inc. |
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5 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 6 Everyone is permitted to copy and distribute verbatim copies |
| 7 of this license document, but changing it is not allowed. | |
| 8 | |
|
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9 [This is the first released version of the Lesser GPL. It also counts |
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10 as the successor of the GNU Library Public License, version 2, hence |
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11 the version number 2.1.] |
| 0 | 12 |
| 13 Preamble | |
| 14 | |
| 15 The licenses for most software are designed to take away your | |
| 16 freedom to share and change it. By contrast, the GNU General Public | |
| 17 Licenses are intended to guarantee your freedom to share and change | |
| 18 free software--to make sure the software is free for all its users. | |
| 19 | |
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20 This license, the Lesser General Public License, applies to some |
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21 specially designated software packages--typically libraries--of the |
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22 Free Software Foundation and other authors who decide to use it. You |
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23 can use it too, but we suggest you first think carefully about whether |
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24 this license or the ordinary General Public License is the better |
|
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25 strategy to use in any particular case, based on the explanations below. |
| 0 | 26 |
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27 When we speak of free software, we are referring to freedom of use, |
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28 not price. Our General Public Licenses are designed to make sure that |
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29 you have the freedom to distribute copies of free software (and charge |
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30 for this service if you wish); that you receive source code or can get |
|
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31 it if you want it; that you can change the software and use pieces of |
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32 it in new free programs; and that you are informed that you can do |
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33 these things. |
| 0 | 34 |
| 35 To protect your rights, we need to make restrictions that forbid | |
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36 distributors to deny you these rights or to ask you to surrender these |
|
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37 rights. These restrictions translate to certain responsibilities for |
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38 you if you distribute copies of the library or if you modify it. |
| 0 | 39 |
| 40 For example, if you distribute copies of the library, whether gratis | |
| 41 or for a fee, you must give the recipients all the rights that we gave | |
| 42 you. You must make sure that they, too, receive or can get the source | |
|
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43 code. If you link other code with the library, you must provide |
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44 complete object files to the recipients, so that they can relink them |
|
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45 with the library after making changes to the library and recompiling |
| 0 | 46 it. And you must show them these terms so they know their rights. |
| 47 | |
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48 We protect your rights with a two-step method: (1) we copyright the |
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49 library, and (2) we offer you this license, which gives you legal |
| 0 | 50 permission to copy, distribute and/or modify the library. |
| 51 | |
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52 To protect each distributor, we want to make it very clear that |
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53 there is no warranty for the free library. Also, if the library is |
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54 modified by someone else and passed on, the recipients should know |
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55 that what they have is not the original version, so that the original |
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56 author's reputation will not be affected by problems that might be |
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57 introduced by others. |
| 0 | 58 |
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59 Finally, software patents pose a constant threat to the existence of |
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60 any free program. We wish to make sure that a company cannot |
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61 effectively restrict the users of a free program by obtaining a |
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62 restrictive license from a patent holder. Therefore, we insist that |
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63 any patent license obtained for a version of the library must be |
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64 consistent with the full freedom of use specified in this license. |
| 0 | 65 |
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66 Most GNU software, including some libraries, is covered by the |
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67 ordinary GNU General Public License. This license, the GNU Lesser |
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68 General Public License, applies to certain designated libraries, and |
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69 is quite different from the ordinary General Public License. We use |
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70 this license for certain libraries in order to permit linking those |
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71 libraries into non-free programs. |
| 0 | 72 |
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73 When a program is linked with a library, whether statically or using |
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74 a shared library, the combination of the two is legally speaking a |
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75 combined work, a derivative of the original library. The ordinary |
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76 General Public License therefore permits such linking only if the |
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77 entire combination fits its criteria of freedom. The Lesser General |
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78 Public License permits more lax criteria for linking other code with |
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79 the library. |
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80 |
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81 We call this license the "Lesser" General Public License because it |
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82 does Less to protect the user's freedom than the ordinary General |
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83 Public License. It also provides other free software developers Less |
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84 of an advantage over competing non-free programs. These disadvantages |
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85 are the reason we use the ordinary General Public License for many |
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86 libraries. However, the Lesser license provides advantages in certain |
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87 special circumstances. |
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89 For example, on rare occasions, there may be a special need to |
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90 encourage the widest possible use of a certain library, so that it becomes |
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91 a de-facto standard. To achieve this, non-free programs must be |
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92 allowed to use the library. A more frequent case is that a free |
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93 library does the same job as widely used non-free libraries. In this |
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94 case, there is little to gain by limiting the free library to free |
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95 software only, so we use the Lesser General Public License. |
| 0 | 96 |
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97 In other cases, permission to use a particular library in non-free |
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98 programs enables a greater number of people to use a large body of |
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99 free software. For example, permission to use the GNU C Library in |
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100 non-free programs enables many more people to use the whole GNU |
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101 operating system, as well as its variant, the GNU/Linux operating |
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102 system. |
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103 |
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104 Although the Lesser General Public License is Less protective of the |
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105 users' freedom, it does ensure that the user of a program that is |
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106 linked with the Library has the freedom and the wherewithal to run |
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107 that program using a modified version of the Library. |
| 0 | 108 |
| 109 The precise terms and conditions for copying, distribution and | |
| 110 modification follow. Pay close attention to the difference between a | |
| 111 "work based on the library" and a "work that uses the library". The | |
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112 former contains code derived from the library, whereas the latter must |
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113 be combined with the library in order to run. |
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115 GNU LESSER GENERAL PUBLIC LICENSE |
| 0 | 116 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION |
| 117 | |
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118 0. This License Agreement applies to any software library or other |
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119 program which contains a notice placed by the copyright holder or |
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120 other authorized party saying it may be distributed under the terms of |
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121 this Lesser General Public License (also called "this License"). |
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122 Each licensee is addressed as "you". |
| 0 | 123 |
| 124 A "library" means a collection of software functions and/or data | |
| 125 prepared so as to be conveniently linked with application programs | |
| 126 (which use some of those functions and data) to form executables. | |
| 127 | |
| 128 The "Library", below, refers to any such software library or work | |
| 129 which has been distributed under these terms. A "work based on the | |
| 130 Library" means either the Library or any derivative work under | |
| 131 copyright law: that is to say, a work containing the Library or a | |
| 132 portion of it, either verbatim or with modifications and/or translated | |
| 133 straightforwardly into another language. (Hereinafter, translation is | |
| 134 included without limitation in the term "modification".) | |
| 135 | |
| 136 "Source code" for a work means the preferred form of the work for | |
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|
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271 6. As an exception to the Sections above, you may also combine or |
| 0 | 272 link a "work that uses the Library" with the Library to produce a |
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298 b) Use a suitable shared library mechanism for linking with the |
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299 Library. A suitable mechanism is one that (1) uses at run time a |
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300 copy of the library already present on the user's computer system, |
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301 rather than copying library functions into the executable, and (2) |
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302 will operate properly with a modified version of the library, if |
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303 the user installs one, as long as the modified version is |
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304 interface-compatible with the version that the work was made with. |
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305 |
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306 c) Accompany the work with a written offer, valid for at |
| 0 | 307 least three years, to give the same user the materials |
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| 309 than the cost of performing this distribution. | |
| 310 | |
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311 d) If distribution of the work is made by offering access to copy |
| 0 | 312 from a designated place, offer equivalent access to copy the above |
| 313 specified materials from the same place. | |
| 314 | |
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315 e) Verify that the user has already received a copy of these |
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321 the materials to be distributed need not include anything that is |
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322 normally distributed (in either source or binary form) with the major |
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371 You are not responsible for enforcing compliance by third parties with |
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414 versions of the Lesser General Public License from time to time. |
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