ui/gl/gl_egl_api_implementation.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 "ui/gl/gl_egl_api_implementation.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/strings/string_split.h"
   9 #include "base/strings/string_util.h"
  10 #include "ui/gl/gl_context.h"
  11 #include "ui/gl/gl_implementation.h"
  12
  13 namespace gfx {
  14
  15 RealEGLApi* g_real_egl;
  16
  17 void InitializeStaticGLBindingsEGL() {
  18   if (!g_real_egl) {
  19     g_real_egl = new RealEGLApi();
  20   }
  21   g_real_egl->Initialize(&g_driver_egl);
  22   g_current_egl_context = g_real_egl;
  23   g_driver_egl.InitializeStaticBindings();
  24
  25   g_real_egl->InitializeFilteredExtensions();
  26 }
  27
  28 void InitializeDebugGLBindingsEGL() {
  29   g_driver_egl.InitializeDebugBindings();
  30 }
  31
  32 void ClearGLBindingsEGL() {
  33   if (g_real_egl) {
  34     delete g_real_egl;
  35     g_real_egl = NULL;
  36   }
  37   g_current_egl_context = NULL;
  38   g_driver_egl.ClearBindings();
  39 }
  40
  41 EGLApi::EGLApi() {
  42 }
  43
  44 EGLApi::~EGLApi() {
  45 }
  46
  47 EGLApiBase::EGLApiBase()
  48     : driver_(NULL) {
  49 }
  50
  51 EGLApiBase::~EGLApiBase() {
  52 }
  53
  54 void EGLApiBase::InitializeBase(DriverEGL* driver) {
  55   driver_ = driver;
  56 }
  57
  58 RealEGLApi::RealEGLApi() {
  59 }
  60
  61 RealEGLApi::~RealEGLApi() {
  62 }
  63
  64 void RealEGLApi::Initialize(DriverEGL* driver) {
  65   InitializeWithCommandLine(driver, base::CommandLine::ForCurrentProcess());
  66 }
  67
  68 void RealEGLApi::InitializeWithCommandLine(DriverEGL* driver,
  69                                            base::CommandLine* command_line) {
  70   DCHECK(command_line);
  71   InitializeBase(driver);
  72
  73   const std::string disabled_extensions = command_line->GetSwitchValueASCII(
  74       switches::kDisableGLExtensions);
  75   if (!disabled_extensions.empty()) {
  76     Tokenize(disabled_extensions, ", ;", &disabled_exts_);
  77   }
  78 }
  79
  80 void RealEGLApi::InitializeFilteredExtensions() {
  81   if (!disabled_exts_.empty() && filtered_exts_.empty()) {
  82     std::vector<std::string> platform_extensions_vec;
  83     std::string platform_ext = DriverEGL::GetPlatformExtensions();
  84     base::SplitString(platform_ext, ' ', &platform_extensions_vec);
  85
  86     std::vector<std::string> client_extensions_vec;
  87     std::string client_ext = DriverEGL::GetClientExtensions();
  88     base::SplitString(client_ext, ' ', &client_extensions_vec);
  89
  90     // Filter out extensions from the command line.
  91     for (const std::string& disabled_ext : disabled_exts_) {
  92       platform_extensions_vec.erase(std::remove(platform_extensions_vec.begin(),
  93                                                 platform_extensions_vec.end(),
  94                                                 disabled_ext),
  95                                     platform_extensions_vec.end());
  96       client_extensions_vec.erase(std::remove(client_extensions_vec.begin(),
  97                                               client_extensions_vec.end(),
  98                                               disabled_ext),
  99                                   client_extensions_vec.end());
 100     }
 101
 102     // Construct filtered extensions string for GL_EXTENSIONS string lookups.
 103     filtered_exts_ = JoinString(platform_extensions_vec, " ");
 104     if (!platform_extensions_vec.empty() && !client_extensions_vec.empty())
 105       filtered_exts_ += " ";
 106     filtered_exts_ += JoinString(client_extensions_vec, " ");
 107   }
 108 }
 109
 110 const char* RealEGLApi::eglQueryStringFn(EGLDisplay dpy, EGLint name) {
 111   if (!filtered_exts_.empty() && name == EGL_EXTENSIONS) {
 112     return filtered_exts_.c_str();
 113   }
 114   return EGLApiBase::eglQueryStringFn(dpy, name);
 115 }
 116
 117 TraceEGLApi::~TraceEGLApi() {
 118 }
 119
 120 bool GetGLWindowSystemBindingInfoEGL(GLWindowSystemBindingInfo* info) {
 121   EGLDisplay display = eglGetCurrentDisplay();
 122   const char* vendor = eglQueryString(display, EGL_VENDOR);
 123   const char* version = eglQueryString(display, EGL_VERSION);
 124   const char* extensions = eglQueryString(display, EGL_EXTENSIONS);
 125   *info = GLWindowSystemBindingInfo();
 126   if (vendor)
 127     info->vendor = vendor;
 128   if (version)
 129     info->version = version;
 130   if (extensions)
 131     info->extensions = extensions;
 132   return true;
 133 }
 134
 135 }  // namespace gfx
 136
 137