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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 PPB_Graphics3D_Shared::PPB_Graphics3D_Shared(const HostResource& host_resource)
     19     : Resource(OBJECT_IS_PROXY, host_resource) {}
     20 
     21 PPB_Graphics3D_Shared::~PPB_Graphics3D_Shared() {
     22   // Make sure that GLES2 implementation has already been destroyed.
     23   DCHECK(!gles2_helper_.get());
     24   DCHECK(!transfer_buffer_.get());
     25   DCHECK(!gles2_impl_.get());
     26 }
     27 
     28 thunk::PPB_Graphics3D_API* PPB_Graphics3D_Shared::AsPPB_Graphics3D_API() {
     29   return this;
     30 }
     31 
     32 int32_t PPB_Graphics3D_Shared::GetAttribs(int32_t attrib_list[]) {
     33   // TODO(alokp): Implement me.
     34   return PP_ERROR_FAILED;
     35 }
     36 
     37 int32_t PPB_Graphics3D_Shared::SetAttribs(const int32_t attrib_list[]) {
     38   // TODO(alokp): Implement me.
     39   return PP_ERROR_FAILED;
     40 }
     41 
     42 int32_t PPB_Graphics3D_Shared::GetError() {
     43   // TODO(alokp): Implement me.
     44   return PP_ERROR_FAILED;
     45 }
     46 
     47 int32_t PPB_Graphics3D_Shared::ResizeBuffers(int32_t width, int32_t height) {
     48   if ((width < 0) || (height < 0))
     49     return PP_ERROR_BADARGUMENT;
     50 
     51   gles2_impl()->ResizeCHROMIUM(width, height, 1.f);
     52   // TODO(alokp): Check if resize succeeded and return appropriate error code.
     53   return PP_OK;
     54 }
     55 
     56 int32_t PPB_Graphics3D_Shared::SwapBuffers(
     57     scoped_refptr<TrackedCallback> callback) {
     58   if (HasPendingSwap()) {
     59     Log(PP_LOGLEVEL_ERROR,
     60         "PPB_Graphics3D.SwapBuffers: Plugin attempted swap "
     61         "with previous swap still pending.");
     62     // Already a pending SwapBuffers that hasn't returned yet.
     63     return PP_ERROR_INPROGRESS;
     64   }
     65 
     66   swap_callback_ = callback;
     67   return DoSwapBuffers();
     68 }
     69 
     70 int32_t PPB_Graphics3D_Shared::GetAttribMaxValue(int32_t attribute,
     71                                                  int32_t* value) {
     72   // TODO(alokp): Implement me.
     73   return PP_ERROR_FAILED;
     74 }
     75 
     76 void* PPB_Graphics3D_Shared::MapTexSubImage2DCHROMIUM(GLenum target,
     77                                                       GLint level,
     78                                                       GLint xoffset,
     79                                                       GLint yoffset,
     80                                                       GLsizei width,
     81                                                       GLsizei height,
     82                                                       GLenum format,
     83                                                       GLenum type,
     84                                                       GLenum access) {
     85   return gles2_impl_->MapTexSubImage2DCHROMIUM(
     86       target, level, xoffset, yoffset, width, height, format, type, access);
     87 }
     88 
     89 void PPB_Graphics3D_Shared::UnmapTexSubImage2DCHROMIUM(const void* mem) {
     90   gles2_impl_->UnmapTexSubImage2DCHROMIUM(mem);
     91 }
     92 
     93 void PPB_Graphics3D_Shared::SwapBuffersACK(int32_t pp_error) {
     94   DCHECK(HasPendingSwap());
     95   swap_callback_->Run(pp_error);
     96 }
     97 
     98 bool PPB_Graphics3D_Shared::HasPendingSwap() const {
     99   return TrackedCallback::IsPending(swap_callback_);
    100 }
    101 
    102 bool PPB_Graphics3D_Shared::CreateGLES2Impl(
    103     int32 command_buffer_size,
    104     int32 transfer_buffer_size,
    105     gpu::gles2::GLES2Implementation* share_gles2) {
    106   gpu::CommandBuffer* command_buffer = GetCommandBuffer();
    107   DCHECK(command_buffer);
    108 
    109   // Create the GLES2 helper, which writes the command buffer protocol.
    110   gles2_helper_.reset(new gpu::gles2::GLES2CmdHelper(command_buffer));
    111   if (!gles2_helper_->Initialize(command_buffer_size))
    112     return false;
    113 
    114   // Create a transfer buffer used to copy resources between the renderer
    115   // process and the GPU process.
    116   const int32 kMinTransferBufferSize = 256 * 1024;
    117   const int32 kMaxTransferBufferSize = 16 * 1024 * 1024;
    118   transfer_buffer_.reset(new gpu::TransferBuffer(gles2_helper_.get()));
    119 
    120   const bool bind_creates_resources = true;
    121   const bool lose_context_when_out_of_memory = false;
    122 
    123   // Create the object exposing the OpenGL API.
    124   gles2_impl_.reset(new gpu::gles2::GLES2Implementation(
    125       gles2_helper_.get(),
    126       share_gles2 ? share_gles2->share_group() : NULL,
    127       transfer_buffer_.get(),
    128       bind_creates_resources,
    129       lose_context_when_out_of_memory,
    130       GetGpuControl()));
    131 
    132   if (!gles2_impl_->Initialize(
    133            transfer_buffer_size,
    134            kMinTransferBufferSize,
    135            std::max(kMaxTransferBufferSize, transfer_buffer_size),
    136            gpu::gles2::GLES2Implementation::kNoLimit)) {
    137     return false;
    138   }
    139 
    140   gles2_impl_->PushGroupMarkerEXT(0, "PPAPIContext");
    141 
    142   return true;
    143 }
    144 
    145 void PPB_Graphics3D_Shared::DestroyGLES2Impl() {
    146   gles2_impl_.reset();
    147   transfer_buffer_.reset();
    148   gles2_helper_.reset();
    149 }
    150 
    151 }  // namespace ppapi
    152