content/browser/compositor/reflector_texture.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/compositor/reflector_texture.h"
   6
   7 #include "content/browser/compositor/owned_mailbox.h"
   8 #include "content/common/gpu/client/context_provider_command_buffer.h"
   9 #include "content/common/gpu/client/gl_helper.h"
  10 #include "gpu/command_buffer/client/context_support.h"
  11 #include "gpu/command_buffer/client/gles2_interface.h"
  12
  13 namespace content {
  14
  15 ReflectorTexture::ReflectorTexture(cc::ContextProvider* context_provider)
  16     : texture_id_(0) {
  17   GLHelper* shared_helper =
  18       ImageTransportFactory::GetInstance()->GetGLHelper();
  19   mailbox_ = new OwnedMailbox(shared_helper);
  20   gpu::gles2::GLES2Interface* gl = context_provider->ContextGL();
  21
  22   gl_helper_.reset(new GLHelper(gl, context_provider->ContextSupport()));
  23
  24   texture_id_ = gl_helper_->ConsumeMailboxToTexture(
  25       mailbox_->mailbox(), mailbox_->sync_point());
  26 }
  27
  28 ReflectorTexture::~ReflectorTexture() {
  29   gl_helper_->DeleteTexture(texture_id_);
  30 }
  31
  32 void ReflectorTexture::CopyTextureFullImage(const gfx::Size& size) {
  33   gl_helper_->CopyTextureFullImage(texture_id_, size);
  34   // Insert a barrier to make the copy show up in the mirroring compositor's
  35   // mailbox. Since the the compositor contexts and the
  36   // ImageTransportFactory's
  37   // GLHelper are all on the same GPU channel, this is sufficient instead of
  38   // plumbing through a sync point.
  39   gl_helper_->InsertOrderingBarrier();
  40 }
  41
  42 void ReflectorTexture::CopyTextureSubImage(const gfx::Rect& rect) {
  43   gl_helper_->CopyTextureSubImage(texture_id_, rect);
  44   // Insert a barrier for the same reason above.
  45   gl_helper_->InsertOrderingBarrier();
  46 }
  47
  48 }  // namespace content