Add a new command buffer function glScheduleCALayerInUseQueryCHROMIUM.

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/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 4714 matching lines @@
   memcpy(mem + 0, contents_rect, 4 * sizeof(GLfloat));
   memcpy(mem + 4, bounds_rect, 4 * sizeof(GLfloat));
   memcpy(mem + 8, clip_rect, 4 * sizeof(GLfloat));
   memcpy(mem + 12, transform, 16 * sizeof(GLfloat));
   helper_->ScheduleCALayerCHROMIUM(contents_texture_id, opacity,
                                    background_color, edge_aa_mask, is_clipped,
                                    sorting_context_id, filter, buffer.shm_id(),
                                    buffer.offset());
 }
 
+void GLES2Implementation::ScheduleCALayerInUseQueryCHROMIUM(
+    GLuint n,
+    const GLuint* textures) {
+  size_t shm_size = n * sizeof(GLuint);
+  ScopedTransferBufferPtr buffer(shm_size, helper_, transfer_buffer_);
+  if (!buffer.valid() || buffer.size() < shm_size) {
+    SetGLError(GL_OUT_OF_MEMORY, "GLES2::ScheduleCALayerInUseQueryCHROMIUM",
+               "out of memory");
+    return;
+  }
+  GLfloat* mem = static_cast<GLfloat*>(buffer.address());

[piman, 2016/06/14 00:58:55]

nit: not GLfloat... GLuint if you want to, but I think just void* is fine.

[erikchen, 2016/06/14 01:47:51]

No longer necessary by using PUTn type.

+  memcpy(mem, textures, shm_size);
+  helper_->ScheduleCALayerInUseQueryCHROMIUMImmediate(n);
+}
+
 void GLES2Implementation::CommitOverlayPlanesCHROMIUM() {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] CommitOverlayPlanesCHROMIUM()");
   TRACE_EVENT0("gpu", "GLES2::CommitOverlayPlanesCHROMIUM");
 
   // Same flow control as GLES2Implementation::SwapBuffers (see comments there).
   swap_buffers_tokens_.push(helper_->InsertToken());
   helper_->CommitOverlayPlanesCHROMIUM();
   helper_->CommandBufferHelper::Flush();
   if (swap_buffers_tokens_.size() > kMaxSwapBuffers + 1) {
@@ skipping 2087 matching lines @@
   cached_extensions_.clear();
 }
 
 // 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