src/gpu/command_buffer/service/gl_context_virtual.cc

   1 // Copyright (c) 2012 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 "gpu/command_buffer/service/gl_context_virtual.h"
   6
   7 #include "gpu/command_buffer/service/gl_state_restorer_impl.h"
   8 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
   9 #include "ui/gl/gl_surface.h"
  10
  11 namespace gpu {
  12
  13 GLContextVirtual::GLContextVirtual(
  14     gfx::GLShareGroup* share_group,
  15     gfx::GLContext* shared_context,
  16     base::WeakPtr<gles2::GLES2Decoder> decoder)
  17   : GLContext(share_group),
  18     shared_context_(shared_context),
  19     display_(NULL),
  20     decoder_(decoder) {
  21 }
  22
  23 gfx::Display* GLContextVirtual::display() {
  24   return display_;
  25 }
  26
  27 bool GLContextVirtual::Initialize(
  28     gfx::GLSurface* compatible_surface, gfx::GpuPreference gpu_preference) {
  29   SetGLStateRestorer(new GLStateRestorerImpl(decoder_));
  30
  31   display_ = static_cast<gfx::Display*>(compatible_surface->GetDisplay());
  32
  33   // Virtual contexts obviously can't make a context that is compatible
  34   // with the surface (the context already exists), but we do need to
  35   // make a context current for SetupForVirtualization() below.
  36   if (!IsCurrent(compatible_surface)) {
  37     if (!shared_context_->MakeCurrent(compatible_surface)) {
  38       // This is likely an error. The real context should be made as
  39       // compatible with all required surfaces when it was created.
  40       LOG(ERROR) << "Failed MakeCurrent(compatible_surface)";
  41       return false;
  42     }
  43   }
  44
  45   shared_context_->SetupForVirtualization();
  46   shared_context_->MakeVirtuallyCurrent(this, compatible_surface);
  47   return true;
  48 }
  49
  50 void GLContextVirtual::Destroy() {
  51   shared_context_->OnReleaseVirtuallyCurrent(this);
  52   shared_context_ = NULL;
  53   display_ = NULL;
  54 }
  55
  56 bool GLContextVirtual::MakeCurrent(gfx::GLSurface* surface) {
  57   if (decoder_.get())
  58     return shared_context_->MakeVirtuallyCurrent(this, surface);
  59
  60   LOG(ERROR) << "Trying to make virtual context current without decoder.";
  61   return false;
  62 }
  63
  64 void GLContextVirtual::ReleaseCurrent(gfx::GLSurface* surface) {
  65   if (IsCurrent(surface)) {
  66     shared_context_->OnReleaseVirtuallyCurrent(this);
  67     shared_context_->ReleaseCurrent(surface);
  68   }
  69 }
  70
  71 bool GLContextVirtual::IsCurrent(gfx::GLSurface* surface) {
  72   // If it's a real surface it needs to be current.
  73   if (surface &&
  74       !surface->IsOffscreen())
  75     return shared_context_->IsCurrent(surface);
  76
  77   // Otherwise, only insure the context itself is current.
  78   return shared_context_->IsCurrent(NULL);
  79 }
  80
  81 void* GLContextVirtual::GetHandle() {
  82   return shared_context_->GetHandle();
  83 }
  84
  85 void GLContextVirtual::SetSwapInterval(int interval) {
  86   shared_context_->SetSwapInterval(interval);
  87 }
  88
  89 std::string GLContextVirtual::GetExtensions() {
  90   return shared_context_->GetExtensions();
  91 }
  92
  93 bool GLContextVirtual::GetTotalGpuMemory(size_t* bytes) {
  94   return shared_context_->GetTotalGpuMemory(bytes);
  95 }
  96
  97 void GLContextVirtual::SetSafeToForceGpuSwitch() {
  98   // TODO(ccameron): This will not work if two contexts that disagree
  99   // about whether or not forced gpu switching may be done both share
 100   // the same underlying shared_context_.
 101   return shared_context_->SetSafeToForceGpuSwitch();
 102 }
 103
 104 bool GLContextVirtual::WasAllocatedUsingRobustnessExtension() {
 105   return shared_context_->WasAllocatedUsingRobustnessExtension();
 106 }
 107
 108 void GLContextVirtual::SetUnbindFboOnMakeCurrent() {
 109   shared_context_->SetUnbindFboOnMakeCurrent();
 110 }
 111
 112 GLContextVirtual::~GLContextVirtual() {
 113   Destroy();
 114 }
 115
 116 }  // namespace gpu