ui/gl/gl_gl_api_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_API_IMPLEMENTATION_H_
   6 #define UI_GL_GL_API_IMPLEMENTATION_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "ui/gl/gl_bindings.h"
  10 #include "ui/gl/gl_export.h"
  11
  12 namespace gpu {
  13 namespace gles2 {
  14 class GLES2Decoder;
  15 }
  16 }
  17 namespace gfx {
  18
  19 class GLContext;
  20 class GLSurface;
  21
  22 void InitializeGLBindingsGL();
  23 void InitializeGLExtensionBindingsGL(GLContext* context);
  24 void InitializeDebugGLBindingsGL();
  25 void ClearGLBindingsGL();
  26 void SetGLToRealGLApi();
  27 void SetGLApi(GLApi* api);
  28
  29 class GL_EXPORT GLApiBase : public GLApi {
  30  public:
  31   // Include the auto-generated part of this class. We split this because
  32   // it means we can easily edit the non-auto generated parts right here in
  33   // this file instead of having to edit some template or the code generator.
  34   #include "gl_bindings_api_autogen_gl.h"
  35
  36  protected:
  37   GLApiBase();
  38   virtual ~GLApiBase();
  39   void InitializeBase(DriverGL* driver);
  40
  41   DriverGL* driver_;
  42 };
  43
  44 // Implemenents the GL API by calling directly into the driver.
  45 class GL_EXPORT RealGLApi : public GLApiBase {
  46  public:
  47   RealGLApi();
  48   virtual ~RealGLApi();
  49   void Initialize(DriverGL* driver);
  50 };
  51
  52 // Inserts a TRACE for every GL call.
  53 class GL_EXPORT TraceGLApi : public GLApi {
  54  public:
  55   TraceGLApi(GLApi* gl_api) : gl_api_(gl_api) { }
  56   virtual ~TraceGLApi();
  57
  58   // Include the auto-generated part of this class. We split this because
  59   // it means we can easily edit the non-auto generated parts right here in
  60   // this file instead of having to edit some template or the code generator.
  61   #include "gl_bindings_api_autogen_gl.h"
  62
  63  private:
  64   GLApi* gl_api_;
  65 };
  66
  67 // Implementents the GL API using co-operative state restoring.
  68 // Assumes there is only one real GL context and that multiple virtual contexts
  69 // are implemented above it. Restores the needed state from the current context.
  70 class GL_EXPORT VirtualGLApi : public GLApiBase {
  71  public:
  72   VirtualGLApi();
  73   virtual ~VirtualGLApi();
  74   void Initialize(DriverGL* driver, GLContext* real_context);
  75
  76   // Sets the current virutal context.
  77   bool MakeCurrent(GLContext* virtual_context, GLSurface* surface);
  78
  79   void OnReleaseVirtuallyCurrent(GLContext* virtual_context);
  80
  81   // Overridden functions from GLApiBase
  82   virtual const GLubyte* glGetStringFn(GLenum name) OVERRIDE;
  83
  84  private:
  85   // The real context we're running on.
  86   GLContext* real_context_;
  87
  88   // The current virtual context.
  89   GLContext* current_context_;
  90
  91   // The supported extensions being advertised for this virtual context.
  92   std::string extensions_;
  93 };
  94
  95 }  // namespace gfx
  96
  97 #endif  // UI_GL_GL_API_IMPLEMENTATION_H_