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/c/gles2/gles2.h"
  11 #include "mojo/public/cpp/system/core.h"
  12
  13 namespace gles2 {
  14
  15 namespace {
  16 const size_t kDefaultCommandBufferSize = 1024 * 1024;
  17 const size_t kDefaultStartTransferBufferSize = 1 * 1024 * 1024;
  18 const size_t kDefaultMinTransferBufferSize = 1 * 256 * 1024;
  19 const size_t kDefaultMaxTransferBufferSize = 16 * 1024 * 1024;
  20 }
  21
  22 GLES2Context::GLES2Context(const std::vector<int32_t>& attribs,
  23                            const MojoAsyncWaiter* async_waiter,
  24                            mojo::ScopedMessagePipeHandle command_buffer_handle,
  25                            MojoGLES2ContextLost lost_callback,
  26                            void* closure)
  27     : command_buffer_(this, attribs, async_waiter,
  28                       command_buffer_handle.Pass()),
  29       lost_callback_(lost_callback),
  30       closure_(closure) {
  31 }
  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   gpu::Capabilities capabilities = command_buffer_.GetCapabilities();
  44   bool bind_generates_resource =
  45       !!capabilities.bind_generates_resource_chromium;
  46   // TODO(piman): Some contexts (such as compositor) want this to be true, so
  47   // this needs to be a public parameter.
  48   bool lose_context_when_out_of_memory = false;
  49   bool support_client_side_arrays = false;
  50   implementation_.reset(
  51       new gpu::gles2::GLES2Implementation(gles2_helper_.get(),
  52                                           NULL,
  53                                           transfer_buffer_.get(),
  54                                           bind_generates_resource,
  55                                           lose_context_when_out_of_memory,
  56                                           support_client_side_arrays,
  57                                           &command_buffer_));
  58   return implementation_->Initialize(kDefaultStartTransferBufferSize,
  59                                      kDefaultMinTransferBufferSize,
  60                                      kDefaultMaxTransferBufferSize,
  61                                      gpu::gles2::GLES2Implementation::kNoLimit);
  62 }
  63
  64 void GLES2Context::ContextLost() { lost_callback_(closure_); }
  65
  66 }  // namespace gles2