ppapi/shared_impl/ppb_graphics_3d_shared.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 PPAPI_SHARED_IMPL_GRAPHICS_3D_IMPL_H_
   6 #define PPAPI_SHARED_IMPL_GRAPHICS_3D_IMPL_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "ppapi/c/pp_completion_callback.h"
  11 #include "ppapi/shared_impl/ppapi_shared_export.h"
  12 #include "ppapi/shared_impl/resource.h"
  13 #include "ppapi/shared_impl/tracked_callback.h"
  14 #include "ppapi/thunk/ppb_graphics_3d_api.h"
  15
  16 namespace gpu {
  17 class CommandBuffer;
  18 class TransferBuffer;
  19 namespace gles2 {
  20 class GLES2CmdHelper;
  21 class GLES2Implementation;
  22 }  // namespace gles2
  23 }  // namespace gpu.
  24
  25 namespace ppapi {
  26
  27 class PPAPI_SHARED_EXPORT PPB_Graphics3D_Shared
  28     : public Resource,
  29       public thunk::PPB_Graphics3D_API {
  30  public:
  31   // Resource overrides.
  32   virtual thunk::PPB_Graphics3D_API* AsPPB_Graphics3D_API() OVERRIDE;
  33
  34   // PPB_Graphics3D_API implementation.
  35   virtual int32_t GetAttribs(int32_t attrib_list[]) OVERRIDE;
  36   virtual int32_t SetAttribs(const int32_t attrib_list[]) OVERRIDE;
  37   virtual int32_t GetError() OVERRIDE;
  38   virtual int32_t ResizeBuffers(int32_t width, int32_t height) OVERRIDE;
  39   virtual int32_t SwapBuffers(scoped_refptr<TrackedCallback> callback) OVERRIDE;
  40   virtual int32_t GetAttribMaxValue(int32_t attribute, int32_t* value) OVERRIDE;
  41
  42   virtual void* MapTexSubImage2DCHROMIUM(GLenum target,
  43                                          GLint level,
  44                                          GLint xoffset,
  45                                          GLint yoffset,
  46                                          GLsizei width,
  47                                          GLsizei height,
  48                                          GLenum format,
  49                                          GLenum type,
  50                                          GLenum access) OVERRIDE;
  51   virtual void UnmapTexSubImage2DCHROMIUM(const void* mem) OVERRIDE;
  52
  53   gpu::gles2::GLES2Implementation* gles2_impl() {
  54     return gles2_impl_.get();
  55   }
  56
  57   // Sends swap-buffers notification to the plugin.
  58   void SwapBuffersACK(int32_t pp_error);
  59
  60  protected:
  61   // ScopedNoLocking makes sure we don't try to lock again when we already have
  62   // the proxy lock. This is used when we need to use the CommandBuffer
  63   // (possibly via gles2_impl) but we already have the proxy lock. The
  64   // CommandBuffer in the plugin side of the proxy will otherwise try to acquire
  65   // the ProxyLock, causing a crash because we already own the lock. (Locks in
  66   // Chromium are never recursive).
  67   class ScopedNoLocking {
  68    public:
  69     explicit ScopedNoLocking(PPB_Graphics3D_Shared* graphics3d_shared)
  70         : graphics3d_shared_(graphics3d_shared) {
  71       graphics3d_shared_->PushAlreadyLocked();
  72     }
  73     ~ScopedNoLocking() {
  74       graphics3d_shared_->PopAlreadyLocked();
  75     }
  76    private:
  77     PPB_Graphics3D_Shared* graphics3d_shared_;  // Weak
  78
  79     DISALLOW_COPY_AND_ASSIGN(ScopedNoLocking);
  80   };
  81
  82
  83   PPB_Graphics3D_Shared(PP_Instance instance);
  84   PPB_Graphics3D_Shared(const HostResource& host_resource);
  85   virtual ~PPB_Graphics3D_Shared();
  86
  87   virtual gpu::CommandBuffer* GetCommandBuffer() = 0;
  88   virtual int32 DoSwapBuffers() = 0;
  89
  90   bool HasPendingSwap() const;
  91   bool CreateGLES2Impl(int32 command_buffer_size,
  92                        int32 transfer_buffer_size,
  93                        gpu::gles2::GLES2Implementation* share_gles2);
  94   void DestroyGLES2Impl();
  95
  96  private:
  97   // On the plugin side, we need to know that we already have the lock, so that
  98   // we don't try to acquire it again. The default implementation does nothing;
  99   // the Plugin side of the proxy must implement these.
 100   friend class ScopedNoLocking;
 101   virtual void PushAlreadyLocked();
 102   virtual void PopAlreadyLocked();
 103
 104   // The VideoDecoder needs to be able to call Graphics3D Flush() after taking
 105   // the proxy lock. Hence it needs access to ScopedNoLocking.
 106   friend class PPB_VideoDecoder_Shared;
 107
 108   scoped_ptr<gpu::gles2::GLES2CmdHelper> gles2_helper_;
 109   scoped_ptr<gpu::TransferBuffer> transfer_buffer_;
 110   scoped_ptr<gpu::gles2::GLES2Implementation> gles2_impl_;
 111
 112   // Callback that needs to be executed when swap-buffers is completed.
 113   scoped_refptr<TrackedCallback> swap_callback_;
 114
 115   DISALLOW_COPY_AND_ASSIGN(PPB_Graphics3D_Shared);
 116 };
 117
 118 }  // namespace ppapi
 119
 120 #endif  // PPAPI_SHARED_IMPL_GRAPHICS_3D_IMPL_H_
 121