X-Git-Url: https://git.ralfj.de/gltest.git/blobdiff_plain/08f1ed05c2541efad748e78db01af569d84c3363..8a26468f18f8efc86767cacccbb7493a87858098:/eglbackend.cpp

diff --git a/eglbackend.cpp b/eglbackend.cpp
index ac7ab38..e2f9787 100644
--- a/eglbackend.cpp
+++ b/eglbackend.cpp
@@ -49,12 +49,21 @@ static void exitEglError(const char *what)
 	exit(1);
 }
 
-// attributes for a  visual in RGBA format with at least 4 bits per color
+static const EGLint context_attribs[] = {
+#ifdef USE_GLES
+	EGL_CONTEXT_CLIENT_VERSION, 2,
+#endif
+	EGL_NONE
+};
 static const EGLint config_attribs[] = {
 	EGL_RED_SIZE,             4,
 	EGL_GREEN_SIZE,           4,
 	EGL_BLUE_SIZE,            4,
+#ifdef USE_GLES
+	EGL_RENDERABLE_TYPE,      EGL_OPENGL_ES2_BIT,
+#else
 	EGL_RENDERABLE_TYPE,      EGL_OPENGL_BIT,
+#endif
 	EGL_NONE,
 };
 
@@ -69,7 +78,16 @@ VisualID EGLBackend::initialize(Display *xDisplay)
 		if (eglInitialize(display, &eglMajor, &eglMinor) == EGL_FALSE)
 			exitEglError("Failed to initialize EGL");
 		printf("Using EGL version %d.%d\n", eglMajor, eglMinor);
-		eglBindAPI(EGL_OPENGL_API);
+		if (eglMajor == 1 && eglMinor < 3) {
+			fprintf(stderr, "Need at least EGL 1.3 to function properly\n");
+			exit(1);
+		}
+#ifdef USE_GLES
+		if (eglBindAPI(EGL_OPENGL_ES_API) == EGL_FALSE)
+#else
+		if (eglBindAPI(EGL_OPENGL_API) == EGL_FALSE)
+#endif
+			exitEglError("Failed to bind API");
 		// get an appropriate config
 		EGLConfig configs[1];
 		EGLint count;
@@ -88,7 +106,7 @@ void EGLBackend::createContext(Window window)
 	assert(display != EGL_NO_DISPLAY && context == EGL_NO_CONTEXT);
 	surface = eglCreateWindowSurface(display, config, window, NULL);
 	// create an EGL context and use it with the surface
-	context = eglCreateContext(display, config, EGL_NO_CONTEXT, NULL);
+	context = eglCreateContext(display, config, EGL_NO_CONTEXT, context_attribs);
 	if (context == EGL_NO_CONTEXT)
 		exitEglError("Failed to create context");
 	if (eglMakeCurrent(display, surface, surface, context) == EGL_FALSE)