1 files changed, 122 insertions, 0 deletions
diff --git a/third_party/libepoxy/libepoxy/src/dispatch_egl.c b/third_party/libepoxy/libepoxy/src/dispatch_egl.c
new file mode 100644
index 0000000000..3f0c7897dd
--- /dev/null
+++ b/third_party/libepoxy/libepoxy/src/dispatch_egl.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "dispatch_common.h"
+
+int
+epoxy_conservative_egl_version(void)
+{
+    EGLDisplay dpy = eglGetCurrentDisplay();
+
+    if (!dpy)
+        return 14;
+
+    return epoxy_egl_version(dpy);
+}
+
+/**
+ * @brief Returns the version of OpenGL we are using
+ *
+ * The version is encoded as:
+ *
+ * ```
+ *
+ *   version = major * 10 + minor
+ *
+ * ```
+ *
+ * So it can be easily used for version comparisons.
+ *
+ * @param The EGL display
+ *
+ * @return The encoded version of EGL we are using
+ *
+ * @see epoxy_gl_version()
+ */
+int
+epoxy_egl_version(EGLDisplay dpy)
+{
+    int major, minor;
+    const char *version_string;
+    int ret;
+
+    version_string = eglQueryString(dpy, EGL_VERSION);
+    if (!version_string)
+        return 0;
+
+    ret = sscanf(version_string, "%d.%d", &major, &minor);
+    assert(ret == 2);
+    return major * 10 + minor;
+}
+
+bool
+epoxy_conservative_has_egl_extension(const char *ext)
+{
+    return epoxy_has_egl_extension(eglGetCurrentDisplay(), ext);
+}
+
+/**
+ * @brief Returns true if the given EGL extension is supported in the current context.
+ *
+ * @param dpy The EGL display
+ * @param extension The name of the EGL extension
+ *
+ * @return `true` if the extension is available
+ *
+ * @see epoxy_has_gl_extension()
+ * @see epoxy_has_glx_extension()
+ */
+bool
+epoxy_has_egl_extension(EGLDisplay dpy, const char *ext)
+{
+    return epoxy_extension_in_string(eglQueryString(dpy, EGL_EXTENSIONS), ext) || epoxy_extension_in_string(eglQueryString(NULL, EGL_EXTENSIONS), ext);
+}
+
+/**
+ * @brief Checks whether EGL is available.
+ *
+ * @return `true` if EGL is available
+ *
+ * @newin{1,4}
+ */
+bool
+epoxy_has_egl(void)
+{
+#if !PLATFORM_HAS_EGL
+    return false;
+#else
+    if (epoxy_load_egl(false, true)) {
+        EGLDisplay* (* pf_eglGetCurrentDisplay) (void);
+
+        pf_eglGetCurrentDisplay = epoxy_conservative_egl_dlsym("eglGetCurrentDisplay", false);
+        if (pf_eglGetCurrentDisplay)
+            return true;
+    }
+
+    return false;
+#endif /* PLATFORM_HAS_EGL */
+}