Modify build_gles2_cmd_buffer.py to generate a class that implements gpu::GLES2Interace and for eac…

gpu/command_buffer/build_gles2_cmd_buffer.py

Index: gpu/command_buffer/build_gles2_cmd_buffer.py
diff --git a/gpu/command_buffer/build_gles2_cmd_buffer.py b/gpu/command_buffer/build_gles2_cmd_buffer.py
index bf5b19ef8b4e78ae5d1a6ccabeed338e9a57f19f..be626605903e9ea2a52d496539f0a19e128df9db 100755
--- a/gpu/command_buffer/build_gles2_cmd_buffer.py
+++ b/gpu/command_buffer/build_gles2_cmd_buffer.py
@@ -4039,6 +4039,46 @@ TEST_P(%(test_name)s, %(name)sInvalidArgs%(arg_index)d_%(value_index)d) {
                (func.return_type, func.original_name,
                 func.MakeTypedOriginalArgString("")))
 
+  def WriteMojoGLES2ImplHeader(self, func, file):
+    """Writes the Mojo GLES2 implementation header."""
+    file.Write("%s %s(%s) override;\n" %
+               (func.return_type, func.original_name,
+                func.MakeTypedOriginalArgString("")))
+
+  def WriteMojoGLES2Impl(self, func, file):
+    """Writes the Mojo GLES2 implementation."""
+    file.Write("%s MojoGLES2Impl::%s(%s) {\n" %
+               (func.return_type, func.original_name,
+                func.MakeTypedOriginalArgString("")))
+    # TODO(alhaad): Add Mojo C thunk for each of the following methods and
+    # remove this.
+    func_list = ["GenQueriesEXT", "BeginQueryEXT", "MapTexSubImage2DCHROMIUM",
+                 "UnmapTexSubImage2DCHROMIUM", "DeleteQueriesEXT",
+                 "EndQueryEXT", "GetQueryObjectuivEXT", "ShallowFlushCHROMIUM",
+                 "GenMailboxCHROMIUM", "ProduceTextureDirectCHROMIUM",
+                 "InsertSyncPointCHROMIUM"]

[jamesr, 2015/03/19 18:22:50]

we have mojo C thunks for InsertSyncPointCHROMIUM:
https://github.com/domokit/mojo/blob/master/mojo/public/c/gles2/gles2_call_vi...

and for the mailbox entry points:
https://github.com/domokit/mojo/blob/master/mojo/public/c/gles2/gles2_call_vi...

[alhaad, 2015/03/19 23:14:59]

Is it ok if I add it when I have added all the other entry points as well?

+    if func.original_name in func_list:
+      file.Write("return static_cast<gpu::gles2::GLES2Interface*>"
+                 "(MojoGLES2GetGLES2Interface(context_))->" +
+                 func.original_name + "(" + func.MakeOriginalArgString("") +
+                 ");")
+      file.Write("}")
+      return
+    if func.IsCoreGLFunction():
+      file.Write("MojoGLES2MakeCurrent(context_);");
+      func_return = "gl" + func.original_name + "(" + \
+          func.MakeOriginalArgString("") + ");"
+      if func.return_type == "void":
+        file.Write(func_return);
+      else:
+        file.Write("return " + func_return);
+    else:
+      file.Write("NOTREACHED() << \"Unimplemented %s.\";\n" %
+                 func.original_name);
+      if func.return_type != "void":
+        file.Write("return 0;")
+    file.Write("}")
+
   def WriteGLES2InterfaceStub(self, func, file):
     """Writes the GLES2 Interface stub declaration."""
     file.Write("%s %s(%s) override;\n" %
@@ -8741,6 +8781,14 @@ class Function(object):
     """Writes the GLES2 Interface declaration."""
     self.type_handler.WriteGLES2InterfaceHeader(self, file)
 
+  def WriteMojoGLES2ImplHeader(self, file):
+    """Writes the Mojo GLES2 implementation header declaration."""
+    self.type_handler.WriteMojoGLES2ImplHeader(self, file)
+
+  def WriteMojoGLES2Impl(self, file):
+    """Writes the Mojo GLES2 implementation declaration."""
+    self.type_handler.WriteMojoGLES2Impl(self, file)
+
   def WriteGLES2InterfaceStub(self, file):
     """Writes the GLES2 Interface Stub declaration."""
     self.type_handler.WriteGLES2InterfaceStub(self, file)
@@ -9764,6 +9812,65 @@ extern const NameToFunc g_gles2_function_table[] = {
     file.Close()
     self.generated_cpp_filenames.append(file.filename)
 
+  def WriteMojoGLES2ImplHeader(self, filename):
+    """Writes the Mojo GLES2 implementation header."""
+    file = CHeaderWriter(
+        filename,
+        "// This file is included by gles2_interface.h to declare the\n"
+        "// GL api functions.\n")
+
+    code = """
+    #include "gpu/command_buffer/client/gles2_interface.h"
+    #include "third_party/mojo/src/mojo/public/c/gles2/gles2.h"
+
+    namespace mojo {
+
+    class MojoGLES2Impl : public gpu::gles2::GLES2Interface {
+     public:
+      MojoGLES2Impl(MojoGLES2Context context) {
+        context_ = context;
+      }
+    """
+    file.Write(code);
+    for func in self.original_functions:
+      func.WriteMojoGLES2ImplHeader(file)
+    code = """
+     private:
+      MojoGLES2Context context_;
+    };
+
+    }  // namespace mojo
+    """
+    file.Write(code);
+    file.Close()
+    self.generated_cpp_filenames.append(file.filename)
+
+  def WriteMojoGLES2Impl(self, filename):
+    """Writes the Mojo GLES2 implementation."""
+    file = CWriter(filename)
+    file.Write(_LICENSE)
+    file.Write(_DO_NOT_EDIT_WARNING)
+
+    code = """
+    #include "gpu/command_buffer/client/mojo_gles2_impl_autogen.h"
+
+    #include "base/logging.h"
+    #include "third_party/khronos/GLES2/gl2.h"
+
+    namespace mojo {
+
+    """
+    file.Write(code);
+    for func in self.original_functions:
+      func.WriteMojoGLES2Impl(file)
+    code = """
+
+    }  // namespace mojo
+    """
+    file.Write(code);
+    file.Close()
+    self.generated_cpp_filenames.append(file.filename)
+
   def WriteGLES2InterfaceStub(self, filename):
     """Writes the GLES2 interface stub header."""
     file = CHeaderWriter(
@@ -10268,6 +10375,10 @@ def main(argv):
     "gpu/command_buffer/common/gles2_cmd_format_test_autogen.h")
   gen.WriteGLES2InterfaceHeader(
     "gpu/command_buffer/client/gles2_interface_autogen.h")
+  gen.WriteMojoGLES2ImplHeader(
+    "gpu/command_buffer/client/mojo_gles2_impl_autogen.h")
+  gen.WriteMojoGLES2Impl(
+    "gpu/command_buffer/client/mojo_gles2_impl_autogen.cc")
   gen.WriteGLES2InterfaceStub(
     "gpu/command_buffer/client/gles2_interface_stub_autogen.h")
   gen.WriteGLES2InterfaceStubImpl(