src/content/browser/renderer_host/compositing_iosurface_context_mac.h

   1 // Copyright (c) 2013 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 CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_CONTEXT_MAC_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_CONTEXT_MAC_H_
   7
   8 #import <AppKit/NSOpenGL.h>
   9 #include <OpenGL/OpenGL.h>
  10 #include <map>
  11
  12 #include "base/basictypes.h"
  13 #include "base/lazy_instance.h"
  14 #include "base/mac/scoped_nsobject.h"
  15 #include "base/memory/ref_counted.h"
  16 #include "base/memory/scoped_ptr.h"
  17
  18 namespace content {
  19
  20 class CompositingIOSurfaceShaderPrograms;
  21
  22 class CompositingIOSurfaceContext
  23     : public base::RefCounted<CompositingIOSurfaceContext> {
  24  public:
  25   // Get or create a GL context for the specified window with the specified
  26   // surface ordering. Share these GL contexts as much as possible because
  27   // creating and destroying them can be expensive
  28   // http://crbug.com/180463
  29   static scoped_refptr<CompositingIOSurfaceContext> Get(int window_number);
  30
  31   // Mark that all the currently existing GL contexts shouldn't be returned
  32   // anymore by Get, but rather, new contexts should be created. This is
  33   // called as a precaution when unexpected GL errors occur.
  34   static void MarkExistingContextsAsNotShareable();
  35
  36   CompositingIOSurfaceShaderPrograms* shader_program_cache() const {
  37     return shader_program_cache_.get();
  38   }
  39   NSOpenGLContext* nsgl_context() const { return nsgl_context_; }
  40   CGLContextObj cgl_context() const { return cgl_context_; }
  41   bool is_vsync_disabled() const { return is_vsync_disabled_; }
  42   int window_number() const { return window_number_; }
  43
  44  private:
  45   friend class base::RefCounted<CompositingIOSurfaceContext>;
  46
  47   CompositingIOSurfaceContext(
  48       int window_number,
  49       NSOpenGLContext* nsgl_context,
  50       CGLContextObj clg_context,
  51       bool is_vsync_disabled_,
  52       scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache);
  53   ~CompositingIOSurfaceContext();
  54
  55   int window_number_;
  56   base::scoped_nsobject<NSOpenGLContext> nsgl_context_;
  57   CGLContextObj cgl_context_; // weak, backed by |nsgl_context_|
  58   bool is_vsync_disabled_;
  59   scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache_;
  60   bool can_be_shared_;
  61
  62   // The global map from window number and window ordering to
  63   // context data.
  64   typedef std::map<int, CompositingIOSurfaceContext*> WindowMap;
  65   static base::LazyInstance<WindowMap> window_map_;
  66   static WindowMap* window_map();
  67 };
  68
  69 }  // namespace content
  70
  71 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_CONTEXT_MAC_H_