1 files changed, 141 insertions, 0 deletions
diff --git a/tests/buffer-count-test.c b/tests/buffer-count-test.c
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+++ b/tests/buffer-count-test.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.  The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <string.h>
+
+#include "weston-test-client-helper.h"
+#include <stdio.h>
+#include <poll.h>
+#include <time.h>
+
+#include <EGL/egl.h>
+#include <wayland-egl.h>
+#include <GLES2/gl2.h>
+
+struct test_data {
+	struct client *client;
+
+	EGLDisplay egl_dpy;
+	EGLContext egl_ctx;
+	EGLConfig egl_conf;
+	EGLSurface egl_surface;
+};
+
+static void
+init_egl(struct test_data *test_data)
+{
+	struct wl_egl_window *native_window;
+	struct surface *surface = test_data->client->surface;
+	const char *str, *mesa;
+
+	static const EGLint context_attribs[] = {
+		EGL_CONTEXT_CLIENT_VERSION, 2,
+		EGL_NONE
+	};
+
+	EGLint config_attribs[] = {
+		EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+		EGL_RED_SIZE, 1,
+		EGL_GREEN_SIZE, 1,
+		EGL_BLUE_SIZE, 1,
+		EGL_ALPHA_SIZE, 0,
+		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+		EGL_NONE
+	};
+
+	EGLint major, minor, n;
+	EGLBoolean ret;
+
+	test_data->egl_dpy = eglGetDisplay((EGLNativeDisplayType)
+					   test_data->client->wl_display);
+	assert(test_data->egl_dpy);
+
+	ret = eglInitialize(test_data->egl_dpy, &major, &minor);
+	assert(ret == EGL_TRUE);
+	ret = eglBindAPI(EGL_OPENGL_ES_API);
+	assert(ret == EGL_TRUE);
+
+	ret = eglChooseConfig(test_data->egl_dpy, config_attribs,
+			      &test_data->egl_conf, 1, &n);
+	assert(ret && n == 1);
+
+	test_data->egl_ctx = eglCreateContext(test_data->egl_dpy,
+					      test_data->egl_conf,
+					      EGL_NO_CONTEXT, context_attribs);
+	assert(test_data->egl_ctx);
+
+	native_window =
+		wl_egl_window_create(surface->wl_surface,
+				     surface->width,
+				     surface->height);
+	test_data->egl_surface =
+		eglCreateWindowSurface(test_data->egl_dpy,
+				       test_data->egl_conf,
+				       (EGLNativeWindowType) native_window,
+				       NULL);
+
+	ret = eglMakeCurrent(test_data->egl_dpy, test_data->egl_surface,
+			     test_data->egl_surface, test_data->egl_ctx);
+	assert(ret == EGL_TRUE);
+
+	/* This test is specific to mesa 10.1 and later, which is the
+	 * first release that doesn't accidentally triple-buffer. */
+	str = (const char *) glGetString(GL_VERSION);
+	mesa = strstr(str, "Mesa ");
+	if (mesa == NULL)
+		skip("unknown EGL implementation (%s)\n", str);
+	if (sscanf(mesa + 5, "%d.%d", &major, &minor) != 2)
+		skip("unrecognized mesa version (%s)\n", str);
+	if (major < 10 || (major == 10 && minor < 1))
+		skip("mesa version too old (%s)\n", str);
+
+}
+
+TEST(test_buffer_count)
+{
+	struct test_data test_data;
+	uint32_t buffer_count;
+	int i;
+
+	test_data.client = client_create(10, 10, 10, 10);
+	init_egl(&test_data);
+
+	/* This is meant to represent a typical game loop which is
+	 * expecting eglSwapBuffers to block and throttle the
+	 * rendering to a sensible frame rate. Therefore it doesn't
+	 * expect to have to install a frame callback itself. I'd
+	 * imagine this is what a typical SDL game would end up
+	 * doing */
+
+	for (i = 0; i < 10; i++) {
+		glClear(GL_COLOR_BUFFER_BIT);
+		eglSwapBuffers(test_data.egl_dpy, test_data.egl_surface);
+	}
+
+	buffer_count = get_n_egl_buffers(test_data.client);
+
+	printf("buffers used = %i\n", buffer_count);
+
+	/* The implementation should only end up creating two buffers
+	 * and cycling between them */
+	assert(buffer_count == 2);
+}