simple-client: Create GLES2 context

diff --git a/clients/simple-client.c b/clients/simple-client.c
index 91c5599..0ae2924 100644 (file)
--- a/clients/simple-client.c
+++ b/clients/simple-client.c
@@ -92,6 +92,7 @@ static const char *vert_shader_text =
        "}\n";
 
 static const char *frag_shader_text =
+       "precision mediump float;\n"
        "varying vec4 v_color;\n"
        "void main() {\n"
        "  gl_FragColor = v_color;\n"
@@ -100,6 +101,11 @@ static const char *frag_shader_text =
 static void
 init_egl(struct display *display)
 {
+       static const EGLint context_attribs[] = {
+               EGL_CONTEXT_CLIENT_VERSION, 2,
+               EGL_NONE
+       };
+
        EGLint major, minor;
        EGLBoolean ret;
 
@@ -108,11 +114,11 @@ init_egl(struct display *display)
 
        ret = eglInitialize(display->egl.dpy, &major, &minor);
        assert(ret == EGL_TRUE);
-       ret = eglBindAPI(EGL_OPENGL_API);
+       ret = eglBindAPI(EGL_OPENGL_ES_API);
        assert(ret == EGL_TRUE);
 
        display->egl.ctx = eglCreateContext(display->egl.dpy, NULL,
-                                           EGL_NO_CONTEXT, NULL);
+                                           EGL_NO_CONTEXT, context_attribs);
        assert(display->egl.ctx);
        ret = eglMakeCurrent(display->egl.dpy, NULL, NULL, display->egl.ctx);
        assert(ret == EGL_TRUE);