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4358 | Serge | 1 | /* |
2 | * Copyright © 2011 Intel Corporation |
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3 | * |
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4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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5 | * copy of this software and associated documentation files (the "Software"), |
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6 | * to deal in the Software without restriction, including without limitation |
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7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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8 | * and/or sell copies of the Software, and to permit persons to whom the |
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9 | * Software is furnished to do so, subject to the following conditions: |
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10 | * |
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11 | * The above copyright notice and this permission notice (including the next |
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12 | * paragraph) shall be included in all copies or substantial portions of the |
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13 | * Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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18 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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19 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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20 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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22 | * DEALINGS IN THE SOFTWARE. |
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23 | * |
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24 | * Authors: |
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25 | * Benjamin Franzke |
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26 | */ |
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27 | |||
28 | #include |
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29 | #include |
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30 | #include |
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31 | #include |
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32 | #include |
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33 | //#include |
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34 | |||
35 | #include "backend.h" |
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36 | |||
37 | #define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0])) |
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38 | |||
39 | extern const struct gbm_backend gbm_dri_backend; |
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40 | |||
41 | struct backend_desc { |
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42 | const char *name; |
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43 | const struct gbm_backend *builtin; |
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44 | }; |
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45 | |||
46 | static const struct backend_desc backends[] = { |
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47 | { "gbm_dri.so", &gbm_dri_backend } |
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48 | // { "gbm_gallium_drm.so", NULL }, |
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49 | }; |
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50 | |||
51 | #if 0 |
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52 | static const void * |
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53 | load_backend(const struct backend_desc *backend) |
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54 | { |
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55 | char path[PATH_MAX]; |
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56 | const void *init = NULL; |
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57 | void *module; |
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58 | const char *name; |
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59 | const char *entrypoint = "gbm_backend"; |
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60 | |||
61 | if (backend == NULL) |
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62 | return NULL; |
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63 | |||
64 | name = backend->name; |
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65 | |||
66 | if (backend->builtin) { |
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67 | init = backend->builtin; |
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68 | } else { |
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69 | #if 0 |
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70 | if (name[0] != '/') |
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71 | snprintf(path, sizeof path, MODULEDIR "/%s", name); |
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72 | else |
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73 | snprintf(path, sizeof path, "%s", name); |
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74 | |||
75 | module = dlopen(path, RTLD_NOW | RTLD_GLOBAL); |
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76 | if (!module) { |
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77 | fprintf(stderr, |
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78 | "failed to load module: %s\n", dlerror()); |
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79 | return NULL; |
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80 | } |
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81 | |||
82 | init = dlsym(module, entrypoint); |
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83 | if (!init) |
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84 | #endif |
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85 | return NULL; |
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86 | } |
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87 | |||
88 | return init; |
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89 | } |
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90 | |||
91 | static const struct backend_desc * |
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92 | find_backend(const char *name) |
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93 | { |
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94 | const struct backend_desc *backend = NULL; |
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95 | int i; |
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96 | |||
97 | for (i = 0; i < ARRAY_SIZE(backends); ++i) { |
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98 | if (strcmp(backends[i].name, name) == 0) { |
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99 | backend = &backends[i]; |
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100 | break; |
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101 | } |
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102 | } |
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103 | |||
104 | return backend; |
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105 | } |
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106 | #endif |
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107 | |||
108 | struct gbm_device * |
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109 | _gbm_create_device(int fd) |
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110 | { |
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111 | const struct gbm_backend *backend = NULL; |
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112 | struct gbm_device *dev = NULL; |
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113 | |||
114 | #if 0 |
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115 | int i; |
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116 | const char *b; |
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117 | |||
118 | b = getenv("GBM_BACKEND"); |
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119 | if (b) |
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120 | backend = load_backend(find_backend(b)); |
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121 | |||
122 | if (backend) |
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123 | dev = backend->create_device(fd); |
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124 | |||
125 | for (i = 0; i < ARRAY_SIZE(backends) && dev == NULL; ++i) { |
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126 | backend = load_backend(&backends[i]); |
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127 | if (backend == NULL) |
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128 | continue; |
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129 | |||
130 | dev = backend->create_device(fd); |
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131 | } |
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132 | #endif |
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133 | |||
134 | backend = &gbm_dri_backend; |
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135 | dev = backend->create_device(fd); |
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136 | |||
137 | return dev; |
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138 | }>> |