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