1 /* Copyright © 2013, Intel Corporation
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 /* Perform some simple drawing via OpenGL as follows:
24 * 1. Using EGL to construct an OpenGLESv2 context
25 * 2. By directly linking with libEGL.so and libGLESv2.so
26 * 3. By using eglGetProcAddress to lookup OpenGL functions
29 #define GL_GLEXT_PROTOTYPES
30 #include <GLES2/gl2.h>
38 /* The OpenGL header files give typedefs for the types of all
39 * functions provided by etensisons. Here, though, we're using
40 * glxGetProcAddress to lookup core functions, so we provide our own
42 typedef void (*FIPS_GLCLEAR_FN)(GLbitfield);
43 FIPS_GLCLEAR_FN my_glClear;
45 typedef void (*FIPS_GLCLEARCOLOR_FN)(GLclampf, GLclampf, GLclampf, GLclampf);
46 FIPS_GLCLEARCOLOR_FN my_glClearColor;
48 typedef void (*FIPS_GLVIEWPORT_FN)(GLint, GLint, GLsizei, GLsizei);
49 FIPS_GLVIEWPORT_FN my_glViewport;
51 #define COMMON_USE_EGL
52 #define COMMON_GL_PREFIX my_
53 #define COMMON_EGL_PREFIX
57 resolve_symbols (void)
59 my_glClear = (FIPS_GLCLEAR_FN) eglGetProcAddress ("glClear");
60 if (my_glClear == NULL) {
61 fprintf (stderr, "Failed to eglGetProcAddress glClear\n");
65 my_glClearColor = (FIPS_GLCLEARCOLOR_FN) eglGetProcAddress ("glClearColor");
66 if (my_glClearColor == NULL) {
67 fprintf (stderr, "Failed to eglGetProcAddress glClearColor\n");
71 my_glViewport = (FIPS_GLVIEWPORT_FN) eglGetProcAddress ("glViewport");
72 if (my_glViewport == NULL) {
73 fprintf (stderr, "Failed to eglGetProcAddress glViewport\n");
87 XVisualInfo *visual_info;
91 dpy = util_x11_init_display ();
93 common_create_egl_context (dpy, EGL_OPENGL_ES_API, &egl_dpy,
94 &ctx, &config, &visual_info);
96 window = util_x11_init_window (dpy, visual_info);
98 surface = eglCreateWindowSurface (egl_dpy, config, window, NULL);
100 common_make_current (egl_dpy, ctx, surface);
102 common_handle_events (dpy, egl_dpy, surface);
104 util_x11_fini_window (dpy, window);
106 util_x11_fini_display (dpy);