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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 #include "ppapi/shared_impl/ppb_graphics_3d_shared.h"
      6 
      7 #include "base/logging.h"
      8 #include "gpu/command_buffer/client/gles2_cmd_helper.h"
      9 #include "gpu/command_buffer/client/gles2_implementation.h"
     10 #include "gpu/command_buffer/client/transfer_buffer.h"
     11 #include "ppapi/c/pp_errors.h"
     12 
     13 namespace ppapi {
     14 
     15 PPB_Graphics3D_Shared::PPB_Graphics3D_Shared(PP_Instance instance)
     16     : Resource(OBJECT_IS_IMPL, instance) {
     17 }
     18 
     19 PPB_Graphics3D_Shared::PPB_Graphics3D_Shared(const HostResource& host_resource)
     20     : Resource(OBJECT_IS_PROXY, host_resource) {
     21 }
     22 
     23 PPB_Graphics3D_Shared::~PPB_Graphics3D_Shared() {
     24   // Make sure that GLES2 implementation has already been destroyed.
     25   DCHECK(!gles2_helper_.get());
     26   DCHECK(!transfer_buffer_.get());
     27   DCHECK(!gles2_impl_.get());
     28 }
     29 
     30 thunk::PPB_Graphics3D_API* PPB_Graphics3D_Shared::AsPPB_Graphics3D_API() {
     31   return this;
     32 }
     33 
     34 int32_t PPB_Graphics3D_Shared::GetAttribs(int32_t attrib_list[]) {
     35   // TODO(alokp): Implement me.
     36   return PP_ERROR_FAILED;
     37 }
     38 
     39 int32_t PPB_Graphics3D_Shared::SetAttribs(const int32_t attrib_list[]) {
     40   // TODO(alokp): Implement me.
     41   return PP_ERROR_FAILED;
     42 }
     43 
     44 int32_t PPB_Graphics3D_Shared::GetError() {
     45   // TODO(alokp): Implement me.
     46   return PP_ERROR_FAILED;
     47 }
     48 
     49 int32_t PPB_Graphics3D_Shared::ResizeBuffers(int32_t width, int32_t height) {
     50   if ((width < 0) || (height < 0))
     51     return PP_ERROR_BADARGUMENT;
     52 
     53   ScopedNoLocking already_locked(this);
     54   gles2_impl()->ResizeCHROMIUM(width, height, 1.f);
     55   // TODO(alokp): Check if resize succeeded and return appropriate error code.
     56   return PP_OK;
     57 }
     58 
     59 int32_t PPB_Graphics3D_Shared::SwapBuffers(
     60     scoped_refptr<TrackedCallback> callback) {
     61   ScopedNoLocking already_locked(this);
     62   if (HasPendingSwap()) {
     63     Log(PP_LOGLEVEL_ERROR, "PPB_Graphics3D.SwapBuffers: Plugin attempted swap "
     64                            "with previous swap still pending.");
     65     // Already a pending SwapBuffers that hasn't returned yet.
     66     return PP_ERROR_INPROGRESS;
     67   }
     68 
     69   swap_callback_ = callback;
     70   return DoSwapBuffers();
     71 }
     72 
     73 int32_t PPB_Graphics3D_Shared::GetAttribMaxValue(int32_t attribute,
     74                                                  int32_t* value) {
     75   // TODO(alokp): Implement me.
     76   return PP_ERROR_FAILED;
     77 }
     78 
     79 void* PPB_Graphics3D_Shared::MapTexSubImage2DCHROMIUM(GLenum target,
     80                                                       GLint level,
     81                                                       GLint xoffset,
     82                                                       GLint yoffset,
     83                                                       GLsizei width,
     84                                                       GLsizei height,
     85                                                       GLenum format,
     86                                                       GLenum type,
     87                                                       GLenum access) {
     88   ScopedNoLocking already_locked(this);
     89   return gles2_impl_->MapTexSubImage2DCHROMIUM(
     90       target, level, xoffset, yoffset, width, height, format, type, access);
     91 }
     92 
     93 void PPB_Graphics3D_Shared::UnmapTexSubImage2DCHROMIUM(const void* mem) {
     94   ScopedNoLocking already_locked(this);
     95   gles2_impl_->UnmapTexSubImage2DCHROMIUM(mem);
     96 }
     97 
     98 void PPB_Graphics3D_Shared::SwapBuffersACK(int32_t pp_error) {
     99   DCHECK(HasPendingSwap());
    100   swap_callback_->Run(pp_error);
    101 }
    102 
    103 bool PPB_Graphics3D_Shared::HasPendingSwap() const {
    104   return TrackedCallback::IsPending(swap_callback_);
    105 }
    106 
    107 bool PPB_Graphics3D_Shared::CreateGLES2Impl(
    108     int32 command_buffer_size,
    109     int32 transfer_buffer_size,
    110     gpu::gles2::GLES2Implementation* share_gles2) {
    111   ScopedNoLocking already_locked(this);
    112   gpu::CommandBuffer* command_buffer = GetCommandBuffer();
    113   DCHECK(command_buffer);
    114 
    115   // Create the GLES2 helper, which writes the command buffer protocol.
    116   gles2_helper_.reset(new gpu::gles2::GLES2CmdHelper(command_buffer));
    117   if (!gles2_helper_->Initialize(command_buffer_size))
    118     return false;
    119 
    120   // Create a transfer buffer used to copy resources between the renderer
    121   // process and the GPU process.
    122   const int32 kMinTransferBufferSize = 256 * 1024;
    123   const int32 kMaxTransferBufferSize = 16 * 1024 * 1024;
    124   transfer_buffer_.reset(new gpu::TransferBuffer(gles2_helper_.get()));
    125 
    126   // Create the object exposing the OpenGL API.
    127   gles2_impl_.reset(new gpu::gles2::GLES2Implementation(
    128       gles2_helper_.get(),
    129       share_gles2 ? share_gles2->share_group() : NULL,
    130       transfer_buffer_.get(),
    131       true,
    132       NULL  // Do not use GpuMemoryBuffers.
    133       ));
    134 
    135   if (!gles2_impl_->Initialize(
    136       transfer_buffer_size,
    137       kMinTransferBufferSize,
    138       std::max(kMaxTransferBufferSize, transfer_buffer_size))) {
    139     return false;
    140   }
    141 
    142   gles2_impl_->PushGroupMarkerEXT(0, "PPAPIContext");
    143 
    144   return true;
    145 }
    146 
    147 void PPB_Graphics3D_Shared::DestroyGLES2Impl() {
    148   ScopedNoLocking already_locked(this);
    149   gles2_impl_.reset();
    150   transfer_buffer_.reset();
    151   gles2_helper_.reset();
    152 }
    153 
    154 void PPB_Graphics3D_Shared::PushAlreadyLocked() {
    155   // Do nothing. This should be overridden in the plugin side.
    156 }
    157 
    158 void PPB_Graphics3D_Shared::PopAlreadyLocked() {
    159   // Do nothing. This should be overridden in the plugin side.
    160 }
    161 
    162 }  // namespace ppapi
    163 
    164