Support GL_OES_EGL_image_external

gpu/command_buffer/service/feature_info.cc

 // Copyright (c) 2011 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 <set>
 #include <string>
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/GLES2/gles2_command_buffer.h"
 #include "ui/gfx/gl/gl_implementation.h"
@@ skipping 315 matching lines @@
 
   if (ext.HaveAndDesire("GL_OES_standard_derivatives") ||
       (gfx::GetGLImplementation() == gfx::kGLImplementationDesktopGL &&
        ext.Desire("GL_OES_standard_derivatives"))) {
     AddExtensionString("GL_OES_standard_derivatives");
     feature_flags_.oes_standard_derivatives = true;
     validators_.hint_target.AddValue(GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES);
     validators_.g_l_state.AddValue(GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES);
   }
 
+  if (ext.HaveAndDesire("GL_OES_EGL_image_external")) {
+    AddExtensionString("GL_OES_EGL_image_external");
+    feature_flags_.oes_egl_image_external = true;
+    validators_.texture_bind_target.AddValue(GL_TEXTURE_EXTERNAL_OES);
+    validators_.get_tex_param_target.AddValue(GL_TEXTURE_EXTERNAL_OES);
+    validators_.texture_parameter.AddValue(GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES);
+    validators_.g_l_state.AddValue(GL_TEXTURE_BINDING_EXTERNAL_OES);
+  }
+
   // TODO(gman): Add support for these extensions.
   //     GL_OES_depth32
   //     GL_OES_element_index_uint
 
   feature_flags_.enable_texture_float_linear = enable_texture_float_linear;
   feature_flags_.enable_texture_half_float_linear =
       enable_texture_half_float_linear;
   feature_flags_.npot_ok = npot_ok;
 }
 
 void FeatureInfo::AddExtensionString(const std::string& str) {
   if (extensions_.find(str) == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 }  // namespace gles2
 }  // namespace gpu