gl: Move platform-specific EGL code into separate files

ui/gl/gl_surface_android.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/gl/gl_surface.h"
+
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "third_party/khronos/EGL/egl.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gl/gl_implementation.h"
+#include "ui/gl/gl_surface_egl.h"
+#include "ui/gl/gl_surface_osmesa.h"
+#include "ui/gl/gl_surface_stub.h"
+
+namespace gfx {
+
+// static
+bool GLSurface::InitializeOneOffInternal() {
+  switch (GetGLImplementation()) {
+    case kGLImplementationEGLGLES2:
+      if (!GLSurfaceEGL::InitializeOneOff()) {
+        LOG(ERROR) << "GLSurfaceEGL::InitializeOneOff failed.";
+        return false;
+      }
+    default:
+      break;
+  }
+  return true;
+}
+
+// static
+scoped_refptr<GLSurface> GLSurface::CreateViewGLSurface(
+    gfx::AcceleratedWidget window) {
+
+  if (GetGLImplementation() == kGLImplementationOSMesaGL) {
+    scoped_refptr<GLSurface> surface(new GLSurfaceOSMesaHeadless());
+    if (!surface->Initialize())
+      return NULL;
+    return surface;
+  }
+  DCHECK(GetGLImplementation() == kGLImplementationEGLGLES2);
+  if (window != kNullAcceleratedWidget) {
+    scoped_refptr<GLSurface> surface = new NativeViewGLSurfaceEGL(window);
+    if (surface->Initialize())
+      return surface;
+  } else {
+    scoped_refptr<GLSurface> surface = new GLSurfaceStub();
+    if (surface->Initialize())
+      return surface;
+  }
+  return NULL;
+}
+
+// static
+scoped_refptr<GLSurface> GLSurface::CreateOffscreenGLSurface(
+    const gfx::Size& size) {
+  switch (GetGLImplementation()) {
+    case kGLImplementationOSMesaGL: {
+      scoped_refptr<GLSurface> surface(new GLSurfaceOSMesa(1, size));
+      if (!surface->Initialize())
+        return NULL;
+
+      return surface;
+    }
+    case kGLImplementationEGLGLES2: {
+      scoped_refptr<GLSurface> surface;
+      if (GLSurfaceEGL::IsEGLSurfacelessContextSupported() &&
+          (size.width() == 0 && size.height() == 0)) {
+        surface = new SurfacelessEGL(size);
+      } else {
+        surface = new PbufferGLSurfaceEGL(size);
+      }
+
+      if (!surface->Initialize())
+        return NULL;
+      return surface;
+    }
+    default:
+      NOTREACHED();
+      return NULL;
+  }
+}
+
+EGLNativeDisplayType GetPlatformDefaultEGLNativeDisplay() {
+  return EGL_DEFAULT_DISPLAY;
+}
+
+}  // namespace gfx