ui/gl/gl_implementation.h

   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 #ifndef UI_GL_GL_IMPLEMENTATION_H_
   6 #define UI_GL_GL_IMPLEMENTATION_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/native_library.h"
  12 #include "build/build_config.h"
  13 #include "ui/gl/gl_export.h"
  14 #include "ui/gl/gl_switches.h"
  15
  16 namespace gfx {
  17
  18 class GLContext;
  19
  20 // The GL implementation currently in use.
  21 enum GLImplementation {
  22   kGLImplementationNone,
  23   kGLImplementationDesktopGL,
  24   kGLImplementationOSMesaGL,
  25   kGLImplementationAppleGL,
  26   kGLImplementationEGLGLES2,
  27   kGLImplementationMockGL
  28 };
  29
  30 struct GLWindowSystemBindingInfo {
  31   std::string vendor;
  32   std::string version;
  33   std::string extensions;
  34 };
  35
  36 void GetAllowedGLImplementations(std::vector<GLImplementation>* impls);
  37
  38 #if defined(OS_WIN)
  39 typedef void* (WINAPI *GLGetProcAddressProc)(const char* name);
  40 #else
  41 typedef void* (*GLGetProcAddressProc)(const char* name);
  42 #endif
  43
  44 // Initialize a particular GL implementation.
  45 GL_EXPORT bool InitializeGLBindings(GLImplementation implementation);
  46
  47 // Initialize extension function bindings for a GL implementation.
  48 GL_EXPORT bool InitializeGLExtensionBindings(GLImplementation implementation,
  49     GLContext* context);
  50
  51 // Initialize Debug logging wrappers for GL bindings.
  52 void InitializeDebugGLBindings();
  53
  54 GL_EXPORT void ClearGLBindings();
  55
  56 // Set the current GL implementation.
  57 GL_EXPORT void SetGLImplementation(GLImplementation implementation);
  58
  59 // Get the current GL implementation.
  60 GL_EXPORT GLImplementation GetGLImplementation();
  61
  62 // Does the underlying GL support all features from Desktop GL 2.0 that were
  63 // removed from the ES 2.0 spec without requiring specific extension strings.
  64 GL_EXPORT bool HasDesktopGLFeatures();
  65
  66 // Get the GL implementation with a given name.
  67 GLImplementation GetNamedGLImplementation(const std::string& name);
  68
  69 // Get the name of a GL implementation.
  70 const char* GetGLImplementationName(GLImplementation implementation);
  71
  72 // Add a native library to those searched for GL entry points.
  73 void AddGLNativeLibrary(base::NativeLibrary library);
  74
  75 // Unloads all native libraries.
  76 void UnloadGLNativeLibraries();
  77
  78 // Set an additional function that will be called to find GL entry points.
  79 void SetGLGetProcAddressProc(GLGetProcAddressProc proc);
  80
  81 // Find a core (non-extension) entry point in the current GL implementation. On
  82 // EGL based implementations core entry points will not be queried through
  83 // GLGetProcAddressProc.
  84 void* GetGLCoreProcAddress(const char* name);
  85
  86 // Find an entry point in the current GL implementation.
  87 void* GetGLProcAddress(const char* name);
  88
  89 // Return information about the GL window system binding implementation (e.g.,
  90 // EGL, GLX, WGL). Returns true if the information was retrieved successfully.
  91 GL_EXPORT bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info);
  92
  93 }  // namespace gfx
  94
  95 #endif  // UI_GL_GL_IMPLEMENTATION_H_