gecko/modules/plugin/base/src/PluginPRLibrary.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
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 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Plugin App.
 *
 * The Initial Developer of the Original Code is
 *   Josh Aas <josh@mozilla.com>
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
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 *
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#include "mozilla/PluginPRLibrary.h"

// Some plugins on Windows, notably Quake Live, implement NP_Initialize using
// cdecl instead of the documented stdcall. In order to work around this,
// we force the caller to use a frame pointer.
#if defined(XP_WIN) && defined(_M_IX86)
#include <malloc.h>

// gNotOptimized exists so that the compiler will not optimize the alloca
// below.
static int gNotOptimized;
#define CALLING_CONVENTION_HACK void* foo = _alloca(gNotOptimized);
#else
#define CALLING_CONVENTION_HACK
#endif

namespace mozilla {

#if defined(XP_UNIX) && !defined(XP_MACOSX)
nsresult
PluginPRLibrary::NP_Initialize(NPNetscapeFuncs* bFuncs,
			       NPPluginFuncs* pFuncs, NPError* error)
{
  if (mNP_Initialize) {
    *error = mNP_Initialize(bFuncs, pFuncs);
  } else {
    NP_InitializeFunc pfNP_Initialize = (NP_InitializeFunc)
      PR_FindFunctionSymbol(mLibrary, "NP_Initialize");
    if (!pfNP_Initialize)
      return NS_ERROR_FAILURE;
    *error = pfNP_Initialize(bFuncs, pFuncs);
  }

  // save NPP_New
  mNPP_New = pFuncs->newp;
  return NS_OK;
}
#else
nsresult
PluginPRLibrary::NP_Initialize(NPNetscapeFuncs* bFuncs, NPError* error)
{
  CALLING_CONVENTION_HACK

  if (mNP_Initialize) {
    *error = mNP_Initialize(bFuncs);
  } else {
    NP_InitializeFunc pfNP_Initialize = (NP_InitializeFunc)
      PR_FindFunctionSymbol(mLibrary, "NP_Initialize");
    if (!pfNP_Initialize)
      return NS_ERROR_FAILURE;
    *error = pfNP_Initialize(bFuncs);
  }

  return NS_OK;
}
#endif

nsresult
PluginPRLibrary::NP_Shutdown(NPError* error)
{
  CALLING_CONVENTION_HACK

  if (mNP_Shutdown) {
    *error = mNP_Shutdown();
  } else {
    NP_ShutdownFunc pfNP_Shutdown = (NP_ShutdownFunc)
      PR_FindFunctionSymbol(mLibrary, "NP_Shutdown");
    if (!pfNP_Shutdown)
      return NS_ERROR_FAILURE;
    *error = pfNP_Shutdown();
  }

  return NS_OK;
}

nsresult
PluginPRLibrary::NP_GetMIMEDescription(const char** mimeDesc)
{
  CALLING_CONVENTION_HACK

  if (mNP_GetMIMEDescription) {
    *mimeDesc = mNP_GetMIMEDescription();
  }
  else {
    NP_GetMIMEDescriptionFunc pfNP_GetMIMEDescription =
      (NP_GetMIMEDescriptionFunc)
      PR_FindFunctionSymbol(mLibrary, "NP_GetMIMEDescription");
    if (!pfNP_GetMIMEDescription) {
      *mimeDesc = "";
      return NS_ERROR_FAILURE;
    }
    *mimeDesc = pfNP_GetMIMEDescription();
  }

  return NS_OK;
}

nsresult
PluginPRLibrary::NP_GetValue(void *future, NPPVariable aVariable,
			     void *aValue, NPError* error)
{
#if defined(XP_UNIX) && !defined(XP_MACOSX)
  if (mNP_GetValue) {
    *error = mNP_GetValue(future, aVariable, aValue);
  } else {
    NP_GetValueFunc pfNP_GetValue = (NP_GetValueFunc)PR_FindFunctionSymbol(mLibrary, "NP_GetValue");
    if (!pfNP_GetValue)
      return NS_ERROR_FAILURE;
    *error = pfNP_GetValue(future, aVariable, aValue);
  }
  return NS_OK;
#else
  return NS_ERROR_NOT_IMPLEMENTED;
#endif
}

#if defined(XP_WIN) || defined(XP_MACOSX) || defined(XP_OS2)
nsresult
PluginPRLibrary::NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error)
{
  CALLING_CONVENTION_HACK

  if (mNP_GetEntryPoints) {
    *error = mNP_GetEntryPoints(pFuncs);
  } else {
    NP_GetEntryPointsFunc pfNP_GetEntryPoints = (NP_GetEntryPointsFunc)
      PR_FindFunctionSymbol(mLibrary, "NP_GetEntryPoints");
    if (!pfNP_GetEntryPoints)
      return NS_ERROR_FAILURE;
    *error = pfNP_GetEntryPoints(pFuncs);
  }

  // save NPP_New
  mNPP_New = pFuncs->newp;
  return NS_OK;
}
#endif

nsresult
PluginPRLibrary::NPP_New(NPMIMEType pluginType, NPP instance,
			 uint16_t mode, int16_t argc, char* argn[],
			 char* argv[], NPSavedData* saved,
			 NPError* error)
{
  if (!mNPP_New)
    return NS_ERROR_FAILURE;
  *error = mNPP_New(pluginType, instance, mode, argc, argn, argv, saved);
  return NS_OK;
}

nsresult
PluginPRLibrary::AsyncSetWindow(NPP instance, NPWindow* window)
{
  nsNPAPIPluginInstance* inst = (nsNPAPIPluginInstance*)instance->ndata;
  NS_ENSURE_TRUE(inst, NS_ERROR_NULL_POINTER);
  return NS_ERROR_NOT_IMPLEMENTED;
}

nsresult
PluginPRLibrary::NotifyPainted(NPP instance)
{
  nsNPAPIPluginInstance* inst = (nsNPAPIPluginInstance*)instance->ndata;
  NS_ENSURE_TRUE(inst, NS_ERROR_NULL_POINTER);
  return NS_ERROR_NOT_IMPLEMENTED;
}

nsresult
PluginPRLibrary::GetSurface(NPP instance, gfxASurface** aSurface)
{
  nsNPAPIPluginInstance* inst = (nsNPAPIPluginInstance*)instance->ndata;
  NS_ENSURE_TRUE(inst, NS_ERROR_NULL_POINTER);
  *aSurface = nsnull;
  return NS_OK;
}

nsresult
PluginPRLibrary::UseAsyncPainting(NPP instance, PRBool* aIsAsync)
{
  nsNPAPIPluginInstance* inst = (nsNPAPIPluginInstance*)instance->ndata;
  NS_ENSURE_TRUE(inst, NS_ERROR_NULL_POINTER);
  *aIsAsync = PR_FALSE;
  return NS_OK;
}

} // namespace mozilla