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      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 
    122