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 // TODO(danakj): Remove this when all test suites are using null-draw.
  27 bool HasInitializedNullDrawGLBindingsGL();
  28 bool SetNullDrawGLBindingsEnabledGL(bool enabled);
  29 void ClearGLBindingsGL();
  30 void SetGLToRealGLApi();
  31 void SetGLApi(GLApi* api);
  32
  33 class GL_EXPORT GLApiBase : public GLApi {
  34  public:
  35   // Include the auto-generated part of this class. We split this because
  36   // it means we can easily edit the non-auto generated parts right here in
  37   // this file instead of having to edit some template or the code generator.
  38   #include "gl_bindings_api_autogen_gl.h"
  39
  40  protected:
  41   GLApiBase();
  42   virtual ~GLApiBase();
  43   void InitializeBase(DriverGL* driver);
  44   void SignalFlush();
  45
  46   DriverGL* driver_;
  47 };
  48
  49 // Implemenents the GL API by calling directly into the driver.
  50 class GL_EXPORT RealGLApi : public GLApiBase {
  51  public:
  52   RealGLApi();
  53   virtual ~RealGLApi();
  54   void Initialize(DriverGL* driver);
  55
  56  private:
  57   virtual void glFinishFn() OVERRIDE;
  58   virtual void glFlushFn() OVERRIDE;
  59 };
  60
  61 // Inserts a TRACE for every GL call.
  62 class GL_EXPORT TraceGLApi : public GLApi {
  63  public:
  64   TraceGLApi(GLApi* gl_api) : gl_api_(gl_api) { }
  65   virtual ~TraceGLApi();
  66
  67   // Include the auto-generated part of this class. We split this because
  68   // it means we can easily edit the non-auto generated parts right here in
  69   // this file instead of having to edit some template or the code generator.
  70   #include "gl_bindings_api_autogen_gl.h"
  71
  72  private:
  73   GLApi* gl_api_;
  74 };
  75
  76 // Implementents the GL API using co-operative state restoring.
  77 // Assumes there is only one real GL context and that multiple virtual contexts
  78 // are implemented above it. Restores the needed state from the current context.
  79 class GL_EXPORT VirtualGLApi : public GLApiBase {
  80  public:
  81   VirtualGLApi();
  82   virtual ~VirtualGLApi();
  83   void Initialize(DriverGL* driver, GLContext* real_context);
  84
  85   // Sets the current virutal context.
  86   bool MakeCurrent(GLContext* virtual_context, GLSurface* surface);
  87
  88   void OnReleaseVirtuallyCurrent(GLContext* virtual_context);
  89
  90 private:
  91   // Overridden functions from GLApiBase
  92   virtual const GLubyte* glGetStringFn(GLenum name) OVERRIDE;
  93   virtual void glFinishFn() OVERRIDE;
  94   virtual void glFlushFn() OVERRIDE;
  95
  96   // The real context we're running on.
  97   GLContext* real_context_;
  98
  99   // The current virtual context.
 100   GLContext* current_context_;
 101
 102   // The supported extensions being advertised for this virtual context.
 103   std::string extensions_;
 104 };
 105
 106 }  // namespace gfx
 107
 108 #endif  // UI_GL_GL_GL_API_IMPLEMENTATION_H_