gpu: Add support for GLX_EXT_texture_from_pixmap extension.

gpu/command_buffer/service/texture_manager_unittest.cc

 // Copyright (c) 2012 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 "gpu/command_buffer/service/texture_manager.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "gpu/command_buffer/common/gl_mock.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_mock.h"
@@ skipping 954 matching lines @@
   manager_.SetLevelInfo(info,
       GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, false);
   EXPECT_TRUE(manager_.CanRender(info));
   EXPECT_FALSE(manager_.HaveUnrenderableTextures());
   EXPECT_CALL(*gl_, DeleteTextures(1, ::testing::Pointee(kService2Id)))
       .Times(1)
       .RetiresOnSaturation();
   info = NULL;
 }
 
+TEST_F(TextureInfoTest, GetLevelImage) {
+  manager_.SetInfoTarget(info_, GL_TEXTURE_2D);
+  manager_.SetLevelInfo(info_,
+      GL_TEXTURE_2D, 1, GL_RGBA, 2, 2, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, true);
+  EXPECT_TRUE(info_->GetLevelImage(GL_TEXTURE_2D, 1) == NULL);
+  // Set image.
+  manager_.SetLevelImage(info_,
+      GL_TEXTURE_2D, 1, gfx::GLImage::CreatePixmapGLImage(NULL));
+  EXPECT_FALSE(info_->GetLevelImage(GL_TEXTURE_2D, 1) == NULL);
+  // Remove it.
+  manager_.SetLevelImage(info_, GL_TEXTURE_2D, 1, NULL);
+  EXPECT_TRUE(info_->GetLevelImage(GL_TEXTURE_2D, 1) == NULL);
+  manager_.SetLevelImage(info_,
+      GL_TEXTURE_2D, 1, gfx::GLImage::CreatePixmapGLImage(NULL));
+  // Image should be reset when SetLevelInfo is called.
+  manager_.SetLevelInfo(info_,
+      GL_TEXTURE_2D, 1, GL_RGBA, 2, 2, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, true);
+  EXPECT_TRUE(info_->GetLevelImage(GL_TEXTURE_2D, 1) == NULL);
+}
+
 }  // namespace gles2
 }  // namespace gpu