Fine tuning glGetInternalformativ.

gpu/command_buffer/client/gles2_implementation.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.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
@@ skipping 5667 matching lines @@
     GLsync sync, GLbitfield flags, GLuint64 timeout) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glWaitSync(" << sync << ", "
                  << flags << ", " << timeout << ")");
   uint32_t v32_0 = 0, v32_1 = 0;
   GLES2Util::MapUint64ToTwoUint32(timeout, &v32_0, &v32_1);
   helper_->WaitSync(ToGLuint(sync), flags, v32_0, v32_1);
   CheckGLError();
 }
 
+void GLES2Implementation::GetInternalformativ(
+    GLenum target, GLenum format, GLenum pname,
+    GLsizei buf_size, GLint* params) {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_VALIDATE_DESTINATION_INITALIZATION(GLint, params);
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glGetInternalformativ("
+                     << GLES2Util::GetStringRenderBufferTarget(target) << ", "
+                     << GLES2Util::GetStringRenderBufferFormat(format) << ", "
+                     << GLES2Util::GetStringInternalFormatParameter(pname)
+                     << ", " << buf_size << ", "
+                     << static_cast<const void*>(params) << ")");
+  if (buf_size < 0) {
+    SetGLError(GL_INVALID_VALUE, "glGetInternalformativ", "bufSize < 0");
+    return;
+  }
+  TRACE_EVENT0("gpu", "GLES2Implementation::GetInternalformativ");
+  if (GetInternalformativHelper(target, format, pname, buf_size, params)) {
+    return;
+  }
+  typedef cmds::GetInternalformativ::Result Result;
+  Result* result = GetResultAs<Result*>();
+  if (!result) {
+    return;
+  }
+  result->SetNumResults(0);
+  helper_->GetInternalformativ(target, format, pname,
+                               GetResultShmId(), GetResultShmOffset());
+  WaitForCmd();
+  GPU_CLIENT_LOG_CODE_BLOCK({
+    for (int32_t i = 0; i < result->GetNumResults(); ++i) {
+      GPU_CLIENT_LOG("  " << i << ": " << result->GetData()[i]);
+    }
+  });
+  if (buf_size > 0 && params) {
+    GLint* data = result->GetData();
+    if (buf_size >= result->GetNumResults()) {
+      buf_size = result->GetNumResults();
+    }
+    for (GLsizei ii = 0; ii < buf_size; ++ii) {
+      params[ii] = data[ii];
+    }
+  }
+  CheckGLError();
+}
+
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/client/gles2_implementation_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu