clients & tests: use eglGetPlatformDisplayEXT when supported

Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>

Makefile.am

@@ -74,6 +74,7 @@ weston_SOURCES =					\
 	shared/matrix.c					\
 	shared/matrix.h					\
 	shared/zalloc.h					\
+	shared/platform.h				\
 	src/weston-egl-ext.h
 
 nodist_weston_SOURCES =					\
@@ -166,7 +167,8 @@ westoninclude_HEADERS =				\
 	src/timeline-object.h			\
 	shared/matrix.h				\
 	shared/config-parser.h			\
-	shared/zalloc.h
+	shared/zalloc.h				\
+	shared/platform.h
 
 if ENABLE_EGL
 module_LTLIBRARIES += gl-renderer.la

clients/nested-client.c

@@ -277,7 +277,9 @@ nested_client_create(void)
 	/* get globals */
 	wl_display_roundtrip(client->display);
 
-	client->egl_display = eglGetDisplay(client->display);
+	client->egl_display =
+		weston_platform_get_egl_display(EGL_PLATFORM_WAYLAND_KHR,
+						client->display, NULL);
 	if (client->egl_display == NULL)
 		return NULL;
 

clients/simple-egl.c

@@ -46,6 +46,8 @@
 #include "protocol/ivi-application-client-protocol.h"
 #define IVI_SURFACE_ID 9000
 
+#include "../shared/platform.h"
+
 #ifndef EGL_EXT_swap_buffers_with_damage
 #define EGL_EXT_swap_buffers_with_damage 1
 typedef EGLBoolean (EGLAPIENTRYP PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC)(EGLDisplay dpy, EGLSurface surface, EGLint *rects, EGLint n_rects);
@@ -151,7 +153,9 @@ init_egl(struct display *display, struct window *window)
 	if (window->opaque || window->buffer_size == 16)
 		config_attribs[9] = 0;
 
-	display->egl.dpy = eglGetDisplay(display->display);
+	display->egl.dpy =
+		weston_platform_get_egl_display(EGL_PLATFORM_WAYLAND_KHR,
+						display->display, NULL);
 	assert(display->egl.dpy);
 
 	ret = eglInitialize(display->egl.dpy, &major, &minor);

clients/subsurfaces.c

@@ -38,6 +38,7 @@
 #include <wayland-egl.h>
 #include <GLES2/gl2.h>
 #include <EGL/egl.h>
+#include <EGL/eglext.h>
 
 #include "window.h"
 
@@ -215,7 +216,9 @@ egl_state_create(struct wl_display *display)
 	egl = calloc(1, sizeof *egl);
 	assert(egl);
 
-	egl->dpy = eglGetDisplay(display);
+	egl->dpy =
+		weston_platform_get_egl_display(EGL_PLATFORM_WAYLAND_KHR,
+						display, NULL);
 	assert(egl->dpy);
 
 	ret = eglInitialize(egl->dpy, &major, &minor);

clients/window.c

@@ -5392,7 +5392,10 @@ init_egl(struct display *d)
 	EGLint api = EGL_OPENGL_API;
 #endif
 
-	d->dpy = eglGetDisplay(d->display);
+	d->dpy =
+		weston_platform_get_egl_display(EGL_PLATFORM_WAYLAND_KHR,
+						d->display, NULL);
+
 	if (!eglInitialize(d->dpy, &major, &minor)) {
 		fprintf(stderr, "failed to initialize EGL\n");
 		return -1;

clients/window.h

@@ -30,6 +30,7 @@
 #include <cairo.h>
 #include "../shared/config-parser.h"
 #include "../shared/zalloc.h"
+#include "../shared/platform.h"
 
 #define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
 

shared/platform.h

@@ -0,0 +1,79 @@
+/*
+ * Copyright © 2015 Collabora, Ltd.
+ *
+ * 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.
+ */
+
+#ifndef WESTON_PLATFORM_H
+#define WESTON_PLATFORM_H
+
+#include <string.h>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#ifdef EGL_EXT_platform_base
+static PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display_ext = NULL;
+
+#ifndef EGL_PLATFORM_WAYLAND_KHR
+#define EGL_PLATFORM_WAYLAND_KHR 0x31D8
+#endif
+#endif /* EGL_EXT_platform_base */
+
+static inline void
+weston_platform_get_egl_proc_addresses(void)
+{
+#ifdef EGL_EXT_platform_base
+	if (!get_platform_display_ext) {
+		const char *extensions = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
+
+		if (strstr(extensions, "EGL_EXT_platform_wayland")
+		    || strstr(extensions, "EGL_KHR_platform_wayland")) {
+			get_platform_display_ext =
+				(void *) eglGetProcAddress("eglGetPlatformDisplayEXT");
+		}
+	}
+#endif
+}
+
+static inline EGLDisplay
+weston_platform_get_egl_display(EGLenum platform, void *native_display,
+				const EGLint *attrib_list)
+{
+#ifdef EGL_EXT_platform_base
+	if (!get_platform_display_ext)
+		weston_platform_get_egl_proc_addresses();
+
+	if (get_platform_display_ext)
+		return get_platform_display_ext(platform,
+						native_display, attrib_list);
+	else
+#endif
+		return eglGetDisplay((EGLNativeDisplayType) native_display);
+}
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif /* WESTON_PLATFORM_H */

tests/buffer-count-test.c

@@ -29,6 +29,7 @@
 #include <GLES2/gl2.h>
 
 #include "weston-test-client-helper.h"
+#include "../shared/platform.h"
 
 #define fail(msg) { fprintf(stderr, "%s failed\n", msg); return -1; }
 
@@ -66,10 +67,12 @@ init_egl(struct test_data *test_data)
 	EGLint major, minor, n;
 	EGLBoolean ret;
 
-	test_data->egl_dpy = eglGetDisplay((EGLNativeDisplayType)
-					   test_data->client->wl_display);
+	test_data->egl_dpy =
+		weston_platform_get_egl_display(EGL_PLATFORM_WAYLAND_KHR,
+						test_data->client->wl_display,
+						NULL);
 	if (!test_data->egl_dpy)
-		fail("eglGetDisplay");
+		fail("eglGetPlatformDisplay or eglGetDisplay");
 
 	if (eglInitialize(test_data->egl_dpy, &major, &minor) != EGL_TRUE)
 		fail("eglInitialize");