Add support for EGL on linux

src/gpu/gl/egl/GrGLCreateNativeInterface_egl.cpp

+
 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-
-
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLAssembleInterface.h"
 #include "gl/GrGLUtil.h"
 
-#include <GL/glx.h>
+#include <EGL/egl.h>
+#include <GLES2/gl2.h>
 
-static GrGLFuncPtr glx_get(void* ctx, const char name[]) {
+static GrGLFuncPtr egl_get_gl_proc(void* ctx, const char name[]) {
     SkASSERT(NULL == ctx);
-    SkASSERT(glXGetCurrentContext());
-    return glXGetProcAddress(reinterpret_cast<const GLubyte*>(name));
+    return eglGetProcAddress(name);
 }
 
 const GrGLInterface* GrGLCreateNativeInterface() {
-    if (NULL == glXGetCurrentContext()) {
-        return NULL;
-    }
-
-    return GrGLAssembleInterface(NULL, glx_get);
+    return GrGLAssembleInterface(NULL, egl_get_gl_proc);
 }