NaCl Proxy for graphics3d.

src/shared/ppapi_proxy/plugin_ppb_graphics_3d.cc

+/*
+ * Copyright (c) 2011 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "native_client/src/shared/ppapi_proxy/plugin_ppb_graphics_3d.h"
+
+#include "gpu/command_buffer/client/gles2_implementation.h"
+#include "native_client/src/shared/ppapi_proxy/command_buffer_nacl.h"
+#include "native_client/src/shared/ppapi_proxy/object_serialize.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_callback.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_globals.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_instance_data.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_ppb_core.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_ppb_var.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_surface_3d.h"
+#include "native_client/src/shared/ppapi_proxy/utility.h"
+#include "native_client/src/shared/srpc/nacl_srpc.h"
+#include "native_client/src/third_party/ppapi/c/pp_completion_callback.h"
+#include "native_client/src/third_party/ppapi/c/pp_errors.h"
+#include "native_client/src/third_party/ppapi/c/pp_rect.h"
+#include "native_client/src/third_party/ppapi/c/pp_var.h"
+#include "srpcgen/ppb_rpc.h"
+
+namespace ppapi_proxy {
+
+namespace {
+
+const int32 kTransferBufferSize = 512 * 1024;
+
+int32_t GetNumAttribs(const int32_t* attrib_list) {
+  int32_t num = 0;
+  if (attrib_list) {
+    // skip over attrib pairs
+    while (attrib_list[num] != PP_GRAPHICS3DATTRIB_NONE)
+      num += 2;
+    // Add one more for PP_GRAPHICS3DATTRIB_NONE.
+    num += 1;
+  }
+  return num;
+}
+
+PP_Resource Create(PP_Instance instance,
+                   PP_Resource share_context,
+                   const int32_t* attrib_list) {
+  DebugPrintf("PPB_Graphics3D::Create: instance=%"NACL_PRIu32"\n", instance);
+  PP_Resource graphics3d_id = kInvalidResourceId;
+  nacl_abi_size_t num_attribs = GetNumAttribs(attrib_list);
+  NaClSrpcError retval =
+      PpbGraphics3DRpcClient::PPB_Graphics3DTrusted_CreateRaw(
+          GetMainSrpcChannel(),
+          instance,
+          share_context,
+          num_attribs, const_cast<int32_t *>(attrib_list),
+          &graphics3d_id);
+  if (retval == NACL_SRPC_RESULT_OK) {
+    scoped_refptr<PluginGraphics3D> graphics_3d =
+        PluginResource::AdoptAs<PluginGraphics3D>(graphics3d_id);
+    if (graphics_3d.get()) {
+      graphics_3d->set_instance_id(instance);
+      return graphics3d_id;
+    }
+  }
+  return kInvalidResourceId;
+}
+
+PP_Bool IsGraphics3D(PP_Resource resource) {
+  DebugPrintf("PPB_Graphics3D::IsGraphics3D: resource=%"NACL_PRIu32"\n",
+              resource);
+  return PluginResource::GetAs<PluginGraphics3D>(resource).get()
+      ? PP_TRUE : PP_FALSE;
+}
+
+int32_t GetAttribs(PP_Resource graphics3d_id,
+                   int32_t* attrib_list) {
+  int32_t pp_error;
+  nacl_abi_size_t num_attribs = GetNumAttribs(attrib_list);
+  NaClSrpcError retval =
+      PpbGraphics3DRpcClient::PPB_Graphics3D_GetAttribs(
+          GetMainSrpcChannel(),
+          graphics3d_id,
+          num_attribs, attrib_list,
+          &num_attribs, attrib_list,
+          &pp_error);
+  if (retval != NACL_SRPC_RESULT_OK) {
+    return PP_ERROR_BADARGUMENT;
+  }
+  return pp_error;
+}
+
+int32_t SetAttribs(PP_Resource graphics3d_id,
+                   int32_t* attrib_list) {
+  int32_t pp_error;
+  nacl_abi_size_t num_attribs = GetNumAttribs(attrib_list);
+  NaClSrpcError retval =
+      PpbGraphics3DRpcClient::PPB_Graphics3D_SetAttribs(
+          GetMainSrpcChannel(),
+          graphics3d_id,
+          num_attribs, attrib_list,
+          &pp_error);
+  if (retval != NACL_SRPC_RESULT_OK) {
+    return PP_ERROR_BADARGUMENT;
+  }
+  return pp_error;
+}
+
+int32_t ResizeBuffers(PP_Resource graphics3d_id,
+                      int32_t width,
+                      int32_t height) {
+  int32_t pp_error;
+  NaClSrpcError retval =
+      PpbGraphics3DRpcClient::PPB_Graphics3D_ResizeBuffers(
+          GetMainSrpcChannel(),
+          graphics3d_id,
+          width,
+          height,
+          &pp_error);
+  if (retval != NACL_SRPC_RESULT_OK) {
+    return PP_ERROR_BADARGUMENT;
+  }
+  return pp_error;
+}
+
+
+int32_t SwapBuffs(PP_Resource graphics3d_id,
+                  struct PP_CompletionCallback callback) {
+  DebugPrintf("PPB_Graphics3D::SwapBuffers: graphics3d_id=%"NACL_PRIu32"\n",
+              graphics3d_id);
+
+  scoped_refptr<PluginGraphics3D> graphics3d =
+      PluginResource::GetAs<PluginGraphics3D>(graphics3d_id).get();
+  if (!graphics3d.get())
+    return MayForceCallback(callback, PP_ERROR_BADRESOURCE);
+
+  return MayForceCallback(callback,
+      graphics3d->SwapBuffers(graphics3d_id, callback));
+}
+
+}  // namespace
+
+__thread PP_Resource PluginGraphics3D::cached_graphics3d_id = 0;
+__thread gpu::gles2::GLES2Implementation*
+  PluginGraphics3D::cached_implementation = NULL;
+
+PluginGraphics3D::PluginGraphics3D() : instance_id_(0) { }
+
+PluginGraphics3D::~PluginGraphics3D() {
+  // Invalidate the cache.
+  cached_graphics3d_id = 0;
+  cached_implementation = NULL;
+}
+
+// static
+gpu::gles2::GLES2Implementation* PluginGraphics3D::implFromResourceSlow(
+    PP_Resource graphics3d_id) {
+  DebugPrintf("PluginGraphics3D::implFromResourceSlow: "
+              "resource=%"NACL_PRIu32"\n", graphics3d_id);
+
+  // For performance reasons, we don't error-check the context, but crash on
+  // NULL instead.
+  gpu::gles2::GLES2Implementation* impl =
+      PluginResource::GetAs<PluginGraphics3D>(graphics3d_id)->impl();
+  cached_graphics3d_id = graphics3d_id;
+  cached_implementation = impl;
+  return impl;
+}
+
+
+bool PluginGraphics3D::InitFromBrowserResource(PP_Resource res) {
+  DebugPrintf("PluginGraphics3D::InitFromBrowserResource: "
+              "resource=%"NACL_PRIu32"\n", res);
+
+  // Create and initialize the objects required to issue GLES2 calls.
+  command_buffer_.reset(new CommandBufferNacl(res, PluginCore::GetInterface()));
+  command_buffer_->Initialize(kTransferBufferSize);
+  gles2_helper_.reset(new gpu::gles2::GLES2CmdHelper(command_buffer_.get()));
+  gpu::Buffer buffer = command_buffer_->GetRingBuffer();
+  if (gles2_helper_->Initialize(buffer.size)) {
+    // Request id -1 to signify 'don't care'
+    int32 transfer_buffer_id =
+        command_buffer_->CreateTransferBuffer(kTransferBufferSize, -1);
+    gpu::Buffer transfer_buffer =
+        command_buffer_->GetTransferBuffer(transfer_buffer_id);
+    if (transfer_buffer.ptr) {
+      gles2_implementation_.reset(new gpu::gles2::GLES2Implementation(
+          gles2_helper_.get(),
+          transfer_buffer.size,
+          transfer_buffer.ptr,
+          transfer_buffer_id,
+          false));
+      return true;
+    }
+  }
+  return false;
+}
+
+int32_t PluginGraphics3D::SwapBuffers(PP_Resource graphics3d_id,
+                                      struct PP_CompletionCallback callback) {
+
+  int32_t callback_id = CompletionCallbackTable::Get()->AddCallback(callback);
+  if (callback_id == 0)  // Just like Chrome, for now disallow blocking calls.
+    return PP_ERROR_BADARGUMENT;
+
+  int32_t pp_error;
+  NaClSrpcError retval =
+      PpbGraphics3DRpcClient::PPB_Graphics3D_SwapBuffers(
+          GetMainSrpcChannel(),
+          graphics3d_id,
+          callback_id,
+          &pp_error);
+  if (retval != NACL_SRPC_RESULT_OK)
+    return PP_ERROR_FAILED;
+
+  if ((PP_OK_COMPLETIONPENDING != pp_error) && (PP_OK != pp_error))
+    return pp_error;
+
+  impl()->SwapBuffers();
+  return PP_OK_COMPLETIONPENDING;
+}
+
+
+// static
+const PPB_Graphics3D_Dev* PluginGraphics3D::GetInterface() {
+  static const PPB_Graphics3D_Dev intf = {
+    &Create,
+    &IsGraphics3D,
+    &GetAttribs,
+    &SetAttribs,
+    &ResizeBuffers,
+    &SwapBuffs,
+  };
+  return &intf;
+}
+
+}  // namespace ppapi_proxy
+