src/mojo/gles2/gles2_context.cc

   1 // Copyright 2014 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 "mojo/gles2/gles2_context.h"
   6
   7 #include "gpu/command_buffer/client/gles2_cmd_helper.h"
   8 #include "gpu/command_buffer/client/gles2_implementation.h"
   9 #include "gpu/command_buffer/client/transfer_buffer.h"
  10 #include "mojo/public/cpp/system/core.h"
  11 #include "mojo/public/gles2/gles2.h"
  12
  13 namespace mojo {
  14 namespace gles2 {
  15
  16 namespace {
  17 const size_t kDefaultCommandBufferSize = 1024 * 1024;
  18 const size_t kDefaultStartTransferBufferSize = 1 * 1024 * 1024;
  19 const size_t kDefaultMinTransferBufferSize = 1 * 256 * 1024;
  20 const size_t kDefaultMaxTransferBufferSize = 16 * 1024 * 1024;
  21 }
  22
  23 GLES2Context::GLES2Context(MojoAsyncWaiter* async_waiter,
  24                            ScopedCommandBufferHandle command_buffer_handle,
  25                            MojoGLES2ContextLost lost_callback,
  26                            MojoGLES2DrawAnimationFrame animation_callback,
  27                            void* closure)
  28     : command_buffer_(this, async_waiter, command_buffer_handle.Pass()),
  29       lost_callback_(lost_callback),
  30       animation_callback_(animation_callback),
  31       closure_(closure) {}
  32
  33 GLES2Context::~GLES2Context() {}
  34
  35 bool GLES2Context::Initialize() {
  36   if (!command_buffer_.Initialize())
  37     return false;
  38   gles2_helper_.reset(new gpu::gles2::GLES2CmdHelper(&command_buffer_));
  39   if (!gles2_helper_->Initialize(kDefaultCommandBufferSize))
  40     return false;
  41   gles2_helper_->SetAutomaticFlushes(false);
  42   transfer_buffer_.reset(new gpu::TransferBuffer(gles2_helper_.get()));
  43   bool bind_generates_resource = true;
  44   // TODO(piman): Some contexts (such as compositor) want this to be true, so
  45   // this needs to be a public parameter.
  46   bool lose_context_when_out_of_memory = false;
  47   implementation_.reset(
  48       new gpu::gles2::GLES2Implementation(gles2_helper_.get(),
  49                                           NULL,
  50                                           transfer_buffer_.get(),
  51                                           bind_generates_resource,
  52                                           lose_context_when_out_of_memory,
  53                                           &command_buffer_));
  54   return implementation_->Initialize(kDefaultStartTransferBufferSize,
  55                                      kDefaultMinTransferBufferSize,
  56                                      kDefaultMaxTransferBufferSize,
  57                                      gpu::gles2::GLES2Implementation::kNoLimit);
  58 }
  59
  60 void GLES2Context::RequestAnimationFrames() {
  61   command_buffer_.RequestAnimationFrames();
  62 }
  63
  64 void GLES2Context::CancelAnimationFrames() {
  65   command_buffer_.CancelAnimationFrames();
  66 }
  67
  68 void GLES2Context::ContextLost() { lost_callback_(closure_); }
  69
  70 void GLES2Context::DrawAnimationFrame() { animation_callback_(closure_); }
  71
  72 }  // namespace gles2
  73 }  // namespace mojo