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annotate src/video/directfb/SDL_DirectFB_dyn.c @ 5267:b530ef003506

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Happy 2011! :)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Feb 2011 22:37:15 -0800
parents 164f20ba08eb
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2011 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21
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22 SDL1.3 DirectFB driver by couriersud@arcor.de
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23
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24 */
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25
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26 #include "SDL_config.h"
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27
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28 #include "SDL_DirectFB_video.h"
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29 #include "SDL_DirectFB_dyn.h"
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30
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31 #ifdef SDL_VIDEO_DRIVER_DIRECTFB_DYNAMIC
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32 #include "SDL_name.h"
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33 #include "SDL_loadso.h"
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34
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35 #define DFB_SYM(ret, name, args, al, func) ret (*name) args;
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36 static struct _SDL_DirectFB_Symbols
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37 {
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38 DFB_SYMS
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39 const unsigned int *directfb_major_version;
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40 const unsigned int *directfb_minor_version;
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41 const unsigned int *directfb_micro_version;
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42 } SDL_DirectFB_Symbols;
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43 #undef DFB_SYM
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44
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45 #define DFB_SYM(ret, name, args, al, func) ret name args { func SDL_DirectFB_Symbols.name al ; }
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46 DFB_SYMS
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47 #undef DFB_SYM
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48
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49 static void *handle = NULL;
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50
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51 int
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52 SDL_DirectFB_LoadLibrary(void)
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53 {
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54 int retval = 0;
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55
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56 if (handle == NULL) {
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57 handle = SDL_LoadObject(SDL_VIDEO_DRIVER_DIRECTFB_DYNAMIC);
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58 if (handle != NULL) {
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59 retval = 1;
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60 #define DFB_SYM(ret, name, args, al, func) if (!(SDL_DirectFB_Symbols.name = SDL_LoadFunction(handle, # name))) retval = 0;
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61 DFB_SYMS
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62 #undef DFB_SYM
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63 if (!
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64 (SDL_DirectFB_Symbols.directfb_major_version =
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65 SDL_LoadFunction(handle, "directfb_major_version")))
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66 retval = 0;
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67 if (!
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68 (SDL_DirectFB_Symbols.directfb_minor_version =
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69 SDL_LoadFunction(handle, "directfb_minor_version")))
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70 retval = 0;
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71 if (!
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72 (SDL_DirectFB_Symbols.directfb_micro_version =
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73 SDL_LoadFunction(handle, "directfb_micro_version")))
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74 retval = 0;
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75 }
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76 }
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77 if (retval) {
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78 const char *stemp = DirectFBCheckVersion(DIRECTFB_MAJOR_VERSION,
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79 DIRECTFB_MINOR_VERSION,
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80 DIRECTFB_MICRO_VERSION);
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81 /* Version Check */
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82 if (stemp != NULL) {
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83 fprintf(stderr,
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84 "DirectFB Lib: Version mismatch. Compiled: %d.%d.%d Library %d.%d.%d\n",
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85 DIRECTFB_MAJOR_VERSION, DIRECTFB_MINOR_VERSION,
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86 DIRECTFB_MICRO_VERSION,
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87 *SDL_DirectFB_Symbols.directfb_major_version,
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88 *SDL_DirectFB_Symbols.directfb_minor_version,
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89 *SDL_DirectFB_Symbols.directfb_micro_version);
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90 retval = 0;
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91 }
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92 }
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93 if (!retval)
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94 SDL_DirectFB_UnLoadLibrary();
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95 return retval;
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96 }
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97
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98 void
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99 SDL_DirectFB_UnLoadLibrary(void)
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100 {
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101 if (handle != NULL) {
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102 SDL_UnloadObject(handle);
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103 handle = NULL;
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104 }
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105 }
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106
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107 #else
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108 int
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109 SDL_DirectFB_LoadLibrary(void)
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110 {
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111 return 1;
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112 }
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113
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114 void
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115 SDL_DirectFB_UnLoadLibrary(void)
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116 {
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117 }
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118 #endif