Branched gpu process and command buffer code into Chrome tree. Fixed up paths and other minor changes to make it work in the Chrome tree. Will remove copy from O3D tree shortly. Only works in Windows currently.

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/436017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@32952 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 107 insertions, 0 deletions

diff --git a/gpu/command_buffer/service/common_decoder.h b/gpu/command_buffer/service/common_decoder.h
new file mode 100644
index 0000000..25d1dbe
--- /dev/null
+++ b/gpu/command_buffer/service/common_decoder.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef GPU_COMMAND_BUFFER_SERVICE_CROSS_COMMON_DECODER_H_
+#define GPU_COMMAND_BUFFER_SERVICE_CROSS_COMMON_DECODER_H_
+
+#include "gpu/command_buffer/service/cmd_parser.h"
+
+namespace command_buffer {
+
+class CommandBufferEngine;
+
+// This class is a helper base class for implementing the common parts of the
+// o3d/gl2 command buffer decoder.
+class CommonDecoder : public AsyncAPIInterface {
+ public:
+  typedef parse_error::ParseError ParseError;
+
+  CommonDecoder() : engine_(NULL) {
+  }
+  virtual ~CommonDecoder() {
+  }
+
+  // Sets the engine, to get shared memory buffers from, and to set the token
+  // to.
+  void set_engine(CommandBufferEngine* engine) {
+    engine_ = engine;
+  }
+
+ protected:
+  // Executes a common command.
+  // Parameters:
+  //    command: the command index.
+  //    arg_count: the number of CommandBufferEntry arguments.
+  //    cmd_data: the command data.
+  // Returns:
+  //   parse_error::NO_ERROR if no error was found, one of
+  //   parse_error::ParseError otherwise.
+  parse_error::ParseError DoCommonCommand(
+      unsigned int command,
+      unsigned int arg_count,
+      const void* cmd_data);
+
+  // Gets the address of shared memory data, given a shared memory ID and an
+  // offset. Also checks that the size is consistent with the shared memory
+  // size.
+  // Parameters:
+  //   shm_id: the id of the shared memory buffer.
+  //   offset: the offset of the data in the shared memory buffer.
+  //   size: the size of the data.
+  // Returns:
+  //   NULL if shm_id isn't a valid shared memory buffer ID or if the size
+  //   check fails. Return a pointer to the data otherwise.
+  void* GetAddressAndCheckSize(unsigned int shm_id,
+                               unsigned int offset,
+                               unsigned int size);
+
+  // Gets an name for a common command.
+  const char* GetCommonCommandName(cmd::CommandId command_id) const;
+
+ private:
+  // Generate a member function prototype for each command in an automated and
+  // typesafe way.
+  #define COMMON_COMMAND_BUFFER_CMD_OP(name)             \
+     parse_error::ParseError Handle ## name(             \
+       unsigned int arg_count,                           \
+       const cmd::name& args);                           \
+
+  COMMON_COMMAND_BUFFER_CMDS(COMMON_COMMAND_BUFFER_CMD_OP)
+
+  #undef COMMON_COMMAND_BUFFER_CMD_OP
+
+  CommandBufferEngine* engine_;
+};
+
+}  // namespace command_buffer
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_CROSS_COMMON_DECODER_H_
+