ui/gl/gl_context_glx.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 extern "C" {
   6 #include <X11/Xlib.h>
   7 }
   8
   9 #include "ui/gl/gl_context_glx.h"
  10
  11 #include "base/logging.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/trace_event/trace_event.h"
  14 #include "ui/gl/GL/glextchromium.h"
  15 #include "ui/gl/gl_bindings.h"
  16 #include "ui/gl/gl_implementation.h"
  17 #include "ui/gl/gl_surface_glx.h"
  18
  19 namespace gfx {
  20
  21 GLContextGLX::GLContextGLX(GLShareGroup* share_group)
  22   : GLContextReal(share_group),
  23     context_(NULL),
  24     display_(NULL) {
  25 }
  26
  27 XDisplay* GLContextGLX::display() {
  28   return display_;
  29 }
  30
  31 bool GLContextGLX::Initialize(
  32     GLSurface* compatible_surface, GpuPreference gpu_preference) {
  33   display_ = static_cast<XDisplay*>(compatible_surface->GetDisplay());
  34
  35   GLXContext share_handle = static_cast<GLXContext>(
  36       share_group() ? share_group()->GetHandle() : NULL);
  37
  38   if (GLSurfaceGLX::IsCreateContextSupported()) {
  39     DVLOG(1) << "GLX_ARB_create_context supported.";
  40     std::vector<int> attribs;
  41     if (GLSurfaceGLX::IsCreateContextRobustnessSupported()) {
  42       DVLOG(1) << "GLX_ARB_create_context_robustness supported.";
  43       attribs.push_back(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB);
  44       attribs.push_back(GLX_LOSE_CONTEXT_ON_RESET_ARB);
  45     }
  46     attribs.push_back(0);
  47     context_ = glXCreateContextAttribsARB(
  48         display_,
  49         static_cast<GLXFBConfig>(compatible_surface->GetConfig()),
  50         share_handle,
  51         True,
  52         &attribs.front());
  53     if (!context_) {
  54       LOG(ERROR) << "Failed to create GL context with "
  55                  << "glXCreateContextAttribsARB.";
  56       return false;
  57     }
  58   } else {
  59     DVLOG(1) << "GLX_ARB_create_context not supported.";
  60     context_ = glXCreateNewContext(
  61        display_,
  62        static_cast<GLXFBConfig>(compatible_surface->GetConfig()),
  63        GLX_RGBA_TYPE,
  64        share_handle,
  65        True);
  66     if (!context_) {
  67       LOG(ERROR) << "Failed to create GL context with glXCreateNewContext.";
  68       return false;
  69     }
  70   }
  71   DCHECK(context_);
  72   DVLOG(1) << "  Successfully allocated "
  73            << (compatible_surface->IsOffscreen() ?
  74                "offscreen" : "onscreen")
  75            << " GL context with LOSE_CONTEXT_ON_RESET_ARB";
  76
  77   DVLOG(1) << (compatible_surface->IsOffscreen() ? "Offscreen" : "Onscreen")
  78            << " context was "
  79            << (glXIsDirect(display_,
  80                            static_cast<GLXContext>(context_))
  81                    ? "direct" : "indirect")
  82            << ".";
  83
  84   return true;
  85 }
  86
  87 void GLContextGLX::Destroy() {
  88   if (context_) {
  89     glXDestroyContext(display_,
  90                       static_cast<GLXContext>(context_));
  91     context_ = NULL;
  92   }
  93 }
  94
  95 bool GLContextGLX::MakeCurrent(GLSurface* surface) {
  96   DCHECK(context_);
  97   if (IsCurrent(surface))
  98     return true;
  99
 100   ScopedReleaseCurrent release_current;
 101   TRACE_EVENT0("gpu", "GLContextGLX::MakeCurrent");
 102   if (!glXMakeContextCurrent(
 103       display_,
 104       reinterpret_cast<GLXDrawable>(surface->GetHandle()),
 105       reinterpret_cast<GLXDrawable>(surface->GetHandle()),
 106       static_cast<GLXContext>(context_))) {
 107     LOG(ERROR) << "Couldn't make context current with X drawable.";
 108     Destroy();
 109     return false;
 110   }
 111
 112   // Set this as soon as the context is current, since we might call into GL.
 113   SetRealGLApi();
 114
 115   SetCurrent(surface);
 116   if (!InitializeDynamicBindings()) {
 117     Destroy();
 118     return false;
 119   }
 120
 121   if (!surface->OnMakeCurrent(this)) {
 122     LOG(ERROR) << "Could not make current.";
 123     Destroy();
 124     return false;
 125   }
 126
 127   release_current.Cancel();
 128   return true;
 129 }
 130
 131 void GLContextGLX::ReleaseCurrent(GLSurface* surface) {
 132   if (!IsCurrent(surface))
 133     return;
 134
 135   SetCurrent(NULL);
 136   if (!glXMakeContextCurrent(display_, 0, 0, 0))
 137     LOG(ERROR) << "glXMakeCurrent failed in ReleaseCurrent";
 138 }
 139
 140 bool GLContextGLX::IsCurrent(GLSurface* surface) {
 141   bool native_context_is_current =
 142       glXGetCurrentContext() == static_cast<GLXContext>(context_);
 143
 144   // If our context is current then our notion of which GLContext is
 145   // current must be correct. On the other hand, third-party code
 146   // using OpenGL might change the current context.
 147   DCHECK(!native_context_is_current || (GetRealCurrent() == this));
 148
 149   if (!native_context_is_current)
 150     return false;
 151
 152   if (surface) {
 153     if (glXGetCurrentDrawable() !=
 154         reinterpret_cast<GLXDrawable>(surface->GetHandle())) {
 155       return false;
 156     }
 157   }
 158
 159   return true;
 160 }
 161
 162 void* GLContextGLX::GetHandle() {
 163   return context_;
 164 }
 165
 166 void GLContextGLX::OnSetSwapInterval(int interval) {
 167   DCHECK(IsCurrent(NULL));
 168   if (HasExtension("GLX_EXT_swap_control") &&
 169       g_driver_glx.fn.glXSwapIntervalEXTFn) {
 170     glXSwapIntervalEXT(
 171         display_,
 172         glXGetCurrentDrawable(),
 173         interval);
 174   } else if (HasExtension("GLX_MESA_swap_control") &&
 175              g_driver_glx.fn.glXSwapIntervalMESAFn) {
 176     glXSwapIntervalMESA(interval);
 177   } else {
 178     if(interval == 0)
 179       LOG(WARNING) <<
 180           "Could not disable vsync: driver does not "
 181           "support GLX_EXT_swap_control";
 182   }
 183 }
 184
 185 std::string GLContextGLX::GetExtensions() {
 186   DCHECK(IsCurrent(NULL));
 187   const char* extensions = GLSurfaceGLX::GetGLXExtensions();
 188   if (extensions) {
 189     return GLContext::GetExtensions() + " " + extensions;
 190   }
 191
 192   return GLContext::GetExtensions();
 193 }
 194
 195 bool GLContextGLX::GetTotalGpuMemory(size_t* bytes) {
 196   DCHECK(bytes);
 197   *bytes = 0;
 198   if (HasExtension("GL_NVX_gpu_memory_info")) {
 199     GLint kbytes = 0;
 200     glGetIntegerv(GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &kbytes);
 201     *bytes = 1024*kbytes;
 202     return true;
 203   }
 204   return false;
 205 }
 206
 207 bool GLContextGLX::WasAllocatedUsingRobustnessExtension() {
 208   return GLSurfaceGLX::IsCreateContextRobustnessSupported();
 209 }
 210
 211 GLContextGLX::~GLContextGLX() {
 212   Destroy();
 213 }
 214
 215 }  // namespace gfx