1 files changed, 60 insertions, 0 deletions
diff --git a/EGL/yagl_native_platform.c b/EGL/yagl_native_platform.c
new file mode 100644
index 0000000..3fd8ada
--- /dev/null
+++ b/EGL/yagl_native_platform.c
@@ -0,0 +1,60 @@
+#include "yagl_native_platform.h"
+#ifdef YAGL_PLATFORM_X11
+#include "x11/yagl_x11_platform.h"
+#endif
+#ifdef YAGL_PLATFORM_GBM
+#include "gbm/yagl_gbm_platform.h"
+#endif
+#include "yagl_log.h"
+#include <stdlib.h>
+#include <string.h>
+
+static struct
+{
+   struct yagl_native_platform *platform;
+   const char *name;
+} g_platforms[] =
+{
+#ifdef YAGL_PLATFORM_GBM
+    {&yagl_gbm_platform, "gbm"},
+#endif
+#ifdef YAGL_PLATFORM_X11
+    {&yagl_x11_platform, "x11"},
+#endif
+};
+
+struct yagl_native_platform *yagl_guess_platform(yagl_os_display os_dpy)
+{
+    const char *platform_name = NULL;
+    uint32_t i;
+
+    YAGL_LOG_FUNC_SET(yagl_guess_platform);
+
+    platform_name = getenv("EGL_PLATFORM");
+
+    if (!platform_name || !platform_name[0]) {
+        platform_name = getenv("EGL_DISPLAY");
+    }
+
+    if (platform_name && platform_name[0]) {
+        for (i = 0; i < sizeof(g_platforms)/sizeof(g_platforms[0]); ++i) {
+            if (strcmp(g_platforms[i].name, platform_name) == 0) {
+                YAGL_LOG_INFO("EGL platform %s chosen by environment variable",
+                              g_platforms[i].name);
+                return g_platforms[i].platform;
+            }
+        }
+    }
+
+    for (i = 0; i < sizeof(g_platforms)/sizeof(g_platforms[0]); ++i) {
+        if (g_platforms[i].platform->probe(os_dpy)) {
+            YAGL_LOG_INFO("EGL platform %s chosen by probing",
+                          g_platforms[i].name);
+            return g_platforms[i].platform;
+        }
+    }
+
+    YAGL_LOG_ERROR("No EGL platform chosen");
+
+    return NULL;
+}