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   enum { kOffscreenContextWindowNumber = -2 };
  26
  27   // Get or create a GL context for the specified window with the specified
  28   // surface ordering. Share these GL contexts as much as possible because
  29   // creating and destroying them can be expensive
  30   // http://crbug.com/180463
  31   static scoped_refptr<CompositingIOSurfaceContext> Get(int window_number);
  32
  33   // Mark that all the currently existing GL contexts shouldn't be returned
  34   // anymore by Get, but rather, new contexts should be created. This is
  35   // called as a precaution when unexpected GL errors occur.
  36   static void MarkExistingContextsAsNotShareable();
  37
  38   CompositingIOSurfaceShaderPrograms* shader_program_cache() const {
  39     return shader_program_cache_.get();
  40   }
  41   NSOpenGLContext* nsgl_context() const { return nsgl_context_; }
  42   CGLContextObj cgl_context() const { return cgl_context_; }
  43   bool is_vsync_disabled() const { return is_vsync_disabled_; }
  44   int window_number() const { return window_number_; }
  45
  46   bool IsVendorIntel();
  47
  48  private:
  49   friend class base::RefCounted<CompositingIOSurfaceContext>;
  50
  51   CompositingIOSurfaceContext(
  52       int window_number,
  53       NSOpenGLContext* nsgl_context,
  54       CGLContextObj clg_context,
  55       bool is_vsync_disabled_,
  56       scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache);
  57   ~CompositingIOSurfaceContext();
  58
  59   int window_number_;
  60   base::scoped_nsobject<NSOpenGLContext> nsgl_context_;
  61   CGLContextObj cgl_context_; // weak, backed by |nsgl_context_|
  62   bool is_vsync_disabled_;
  63   scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache_;
  64   bool can_be_shared_;
  65
  66   bool initialized_is_intel_;
  67   bool is_intel_;
  68   GLint screen_;
  69
  70   // The global map from window number and window ordering to
  71   // context data.
  72   typedef std::map<int, CompositingIOSurfaceContext*> WindowMap;
  73   static base::LazyInstance<WindowMap> window_map_;
  74   static WindowMap* window_map();
  75 };
  76
  77 }  // namespace content
  78
  79 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_CONTEXT_MAC_H_