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 void GetAllowedGLImplementations(std::vector<GLImplementation>* impls);
  31
  32 #if defined(OS_WIN)
  33 typedef void* (WINAPI *GLGetProcAddressProc)(const char* name);
  34 #else
  35 typedef void* (*GLGetProcAddressProc)(const char* name);
  36 #endif
  37
  38 // Initialize a particular GL implementation.
  39 GL_EXPORT bool InitializeGLBindings(GLImplementation implementation);
  40
  41 // Initialize extension function bindings for a GL implementation.
  42 GL_EXPORT bool InitializeGLExtensionBindings(GLImplementation implementation,
  43     GLContext* context);
  44
  45 // Initialize Debug logging wrappers for GL bindings.
  46 void InitializeDebugGLBindings();
  47
  48 void ClearGLBindings();
  49
  50 // Set the current GL implementation.
  51 GL_EXPORT void SetGLImplementation(GLImplementation implementation);
  52
  53 // Get the current GL implementation.
  54 GL_EXPORT GLImplementation GetGLImplementation();
  55
  56 // Does the underlying GL support all features from Desktop GL 2.0 that were
  57 // removed from the ES 2.0 spec without requiring specific extension strings.
  58 GL_EXPORT bool HasDesktopGLFeatures();
  59
  60 // Get the GL implementation with a given name.
  61 GLImplementation GetNamedGLImplementation(const std::string& name);
  62
  63 // Get the name of a GL implementation.
  64 const char* GetGLImplementationName(GLImplementation implementation);
  65
  66 // Add a native library to those searched for GL entry points.
  67 void AddGLNativeLibrary(base::NativeLibrary library);
  68
  69 // Unloads all native libraries.
  70 void UnloadGLNativeLibraries();
  71
  72 // Set an additional function that will be called to find GL entry points.
  73 void SetGLGetProcAddressProc(GLGetProcAddressProc proc);
  74
  75 // Find a core (non-extension) entry point in the current GL implementation. On
  76 // EGL based implementations core entry points will not be queried through
  77 // GLGetProcAddressProc.
  78 void* GetGLCoreProcAddress(const char* name);
  79
  80 // Find an entry point in the current GL implementation.
  81 void* GetGLProcAddress(const char* name);
  82
  83 }  // namespace gfx
  84
  85 #endif  // UI_GL_GL_IMPLEMENTATION_H_