Make OSMesa GL implementation advertise supported functionality as ES2 extensions

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 "ui/gfx/gl/gl_implementation.h"
 
@@ skipping 214 matching lines @@
     validators_.texture_internal_format.AddValue(GL_BGRA_EXT);
     validators_.texture_format.AddValue(GL_BGRA_EXT);
   }
 
   if (enable_read_format_bgra) {
     AddExtensionString("GL_EXT_read_format_bgra");
     validators_.read_pixel_format.AddValue(GL_BGRA_EXT);
   }
 
   if (ext.Desire("GL_OES_rgb8_rgba8")) {
-    if (ext.Have("GL_OES_rgb8_rgba8") ||
-        gfx::GetGLImplementation() == gfx::kGLImplementationDesktopGL) {
+    if (ext.Have("GL_OES_rgb8_rgba8") || gfx::HasDesktopGLFeatures()) {
       AddExtensionString("GL_OES_rgb8_rgba8");
       validators_.render_buffer_format.AddValue(GL_RGB8_OES);
       validators_.render_buffer_format.AddValue(GL_RGBA8_OES);
     }
   }
 
   // Check if we should allow GL_OES_texture_npot
   if (ext.Desire("GL_OES_texture_npot") &&
       (ext.Have("GL_ARB_texture_non_power_of_two") ||
        ext.Have("GL_OES_texture_npot"))) {
@@ skipping 62 matching lines @@
     feature_flags_.chromium_framebuffer_multisample = true;
     validators_.frame_buffer_target.AddValue(GL_READ_FRAMEBUFFER_EXT);
     validators_.frame_buffer_target.AddValue(GL_DRAW_FRAMEBUFFER_EXT);
     validators_.g_l_state.AddValue(GL_READ_FRAMEBUFFER_BINDING_EXT);
     validators_.g_l_state.AddValue(GL_MAX_SAMPLES_EXT);
     validators_.render_buffer_parameter.AddValue(GL_RENDERBUFFER_SAMPLES_EXT);
     AddExtensionString("GL_CHROMIUM_framebuffer_multisample");
   }
 
   if (ext.HaveAndDesire("GL_OES_depth24") ||
-      (gfx::GetGLImplementation() == gfx::kGLImplementationDesktopGL &&
-       ext.Desire("GL_OES_depth24"))) {
+      (gfx::HasDesktopGLFeatures() && ext.Desire("GL_OES_depth24"))) {
     AddExtensionString("GL_OES_depth24");
     validators_.render_buffer_format.AddValue(GL_DEPTH_COMPONENT24);
   }
 
   if (ext.HaveAndDesire("GL_OES_standard_derivatives") ||
-      (gfx::GetGLImplementation() == gfx::kGLImplementationDesktopGL &&
+      (gfx::HasDesktopGLFeatures() &&
        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;
@@ skipping 14 matching lines @@
 }
 
 void FeatureInfo::AddExtensionString(const std::string& str) {
   if (extensions_.find(str) == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 }  // namespace gles2
 }  // namespace gpu