1 | /* |
2 | * Copyright © 2014 Intel Corporation |
3 | * |
4 | * Permission is hereby granted, free of charge, to any person obtaining a |
5 | * copy of this software and associated documentation files (the "Software"), |
6 | * to deal in the Software without restriction, including without limitation |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
8 | * and/or sell copies of the Software, and to permit persons to whom the |
9 | * Software is furnished to do so, subject to the following conditions: |
10 | * |
11 | * The above copyright notice and this permission notice (including the next |
12 | * paragraph) shall be included in all copies or substantial portions of the |
13 | * Software. |
14 | * |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
21 | * IN THE SOFTWARE. |
22 | */ |
23 | |
24 | /** |
25 | * @file egl_without_glx.c |
26 | * |
27 | * Tries to test operation of the library on a GL stack with EGL and |
28 | * GLES but no GLX or desktop GL (such as Arm's Mali GLES3 drivers). |
29 | * This test is varied by the GLES_VERSION defined at compile time to |
30 | * test either a GLES1-only or a GLES2-only system. |
31 | */ |
32 | |
33 | #define _GNU_SOURCE |
34 | |
35 | #include <stdio.h> |
36 | #include <string.h> |
37 | #include <stdlib.h> |
38 | #include <assert.h> |
39 | #include <err.h> |
40 | #include <dlfcn.h> |
41 | #include "epoxy/gl.h" |
42 | #include "epoxy/egl.h" |
43 | |
44 | #include "egl_common.h" |
45 | |
46 | /** |
47 | * Wraps the system dlopen(), which libepoxy will end up calling when |
48 | * it tries to dlopen() the API libraries, and errors out the |
49 | * libraries we're trying to simulate not being installed on the |
50 | * system. |
51 | */ |
52 | void * |
53 | dlopen(const char *filename, int flag) |
54 | { |
55 | void * (*dlopen_unwrapped)(const char *filename, int flag); |
56 | |
57 | if (filename) { |
58 | if (!strcmp(s1: filename, s2: "libGL.so.1" )) |
59 | return NULL; |
60 | #if GLES_VERSION == 2 |
61 | if (!strcmp(filename, "libGLESv1_CM.so.1" )) |
62 | return NULL; |
63 | #else |
64 | if (!strcmp(s1: filename, s2: "libGLESv2.so.2" )) |
65 | return NULL; |
66 | #endif |
67 | } |
68 | |
69 | dlopen_unwrapped = dlsym(RTLD_NEXT, name: "dlopen" ); |
70 | assert(dlopen_unwrapped); |
71 | |
72 | return dlopen_unwrapped(filename, flag); |
73 | } |
74 | |
75 | |
76 | static EGLenum last_api; |
77 | static EGLenum = EGL_SUCCESS; |
78 | |
79 | /** |
80 | * Override of the real libEGL's eglBindAPI to simulate the target |
81 | * system's eglBindAPI. |
82 | */ |
83 | static EGLBoolean |
84 | override_eglBindAPI(EGLenum api) |
85 | { |
86 | void *egl = dlopen(filename: "libEGL.so.1" , RTLD_LAZY | RTLD_LOCAL); |
87 | EGLBoolean (*real_eglBindAPI)(EGLenum api) = dlsym(handle: egl, name: "eglBindAPI" ); |
88 | |
89 | last_api = api; |
90 | |
91 | if (api == EGL_OPENGL_API) { |
92 | extra_error = EGL_BAD_PARAMETER; |
93 | return EGL_FALSE; |
94 | } |
95 | |
96 | assert(real_eglBindAPI); |
97 | return real_eglBindAPI(api); |
98 | } |
99 | |
100 | /** |
101 | * Override of the real libEGL's eglGetError() to feed back the error |
102 | * that might have been generated by override_eglBindAPI(). |
103 | */ |
104 | static EGLint |
105 | override_eglGetError(void) |
106 | { |
107 | void *egl = dlopen(filename: "libEGL.so.1" , RTLD_LAZY | RTLD_LOCAL); |
108 | EGLint (*real_eglGetError)(void) = dlsym(handle: egl, name: "eglGetError" ); |
109 | |
110 | if (extra_error != EGL_SUCCESS) { |
111 | EGLenum error = extra_error; |
112 | extra_error = EGL_SUCCESS; |
113 | return error; |
114 | } |
115 | |
116 | assert(real_eglGetError); |
117 | return real_eglGetError(); |
118 | } |
119 | |
120 | int |
121 | main(int argc, char **argv) |
122 | { |
123 | bool pass = true; |
124 | EGLDisplay *dpy = get_egl_display_or_skip(); |
125 | EGLint context_attribs[] = { |
126 | EGL_CONTEXT_CLIENT_VERSION, GLES_VERSION, |
127 | EGL_NONE |
128 | }; |
129 | EGLConfig cfg; |
130 | EGLint config_attribs[] = { |
131 | EGL_SURFACE_TYPE, EGL_WINDOW_BIT, |
132 | EGL_RED_SIZE, 1, |
133 | EGL_GREEN_SIZE, 1, |
134 | EGL_BLUE_SIZE, 1, |
135 | EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, |
136 | EGL_NONE |
137 | }; |
138 | EGLint count; |
139 | EGLContext ctx; |
140 | const unsigned char *string; |
141 | |
142 | epoxy_eglBindAPI = override_eglBindAPI; |
143 | epoxy_eglGetError = override_eglGetError; |
144 | |
145 | if (!epoxy_has_egl_extension(dpy, extension: "EGL_KHR_surfaceless_context" )) |
146 | errx(status: 77, format: "Test requires EGL_KHR_surfaceless_context" ); |
147 | |
148 | eglBindAPI(EGL_OPENGL_ES_API); |
149 | |
150 | if (!eglChooseConfig(dpy, config_attribs, &cfg, 1, &count)) |
151 | errx(status: 77, format: "Couldn't get an EGLConfig\n" ); |
152 | |
153 | ctx = eglCreateContext(dpy, cfg, NULL, context_attribs); |
154 | if (!ctx) |
155 | errx(status: 77, format: "Couldn't create a GLES%d context\n" , GLES_VERSION); |
156 | |
157 | eglMakeCurrent(dpy, NULL, NULL, ctx); |
158 | |
159 | string = glGetString(GL_VERSION); |
160 | printf(format: "GL_VERSION: %s\n" , string); |
161 | |
162 | assert(eglGetError() == EGL_SUCCESS); |
163 | |
164 | return pass != true; |
165 | } |
166 | |