b2g/app/nsBrowserApp.cpp
author Timothy Nikkel <tnikkel@gmail.com>
Mon, 22 Aug 2016 21:15:38 -0500
changeset 352251 85cfd0bd6eb0c321ccfa105f49e2f607d88b79f9
parent 349261 c4de227304aa18ceb41047e222272f22fd99d5f9
child 359052 e8f4dc9c44cc79fcc35913c8d87063dfabbe127e
permissions -rw-r--r--
Bug 1260324. Don't draw garbage to the screen if an image doesn't happen to be decoded. r=seth Layout has been using imgIContainer::IsOpaque to determine if the image will draw opaquely to all pixels it covers, and doing culling based on this. However imgIContainer::IsOpaque doesn't guarantee anything. It only describes if the image, when in a decoded state, has all opaque pixels. So if the image doesn't have fully decoded frames around (because they got discarded) it may not draw opaquely to all of its pixels. So we create a new function that first checks if there is a fully decoded frame.

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsXULAppAPI.h"
#include "application.ini.h"
#include "nsXPCOMGlue.h"
#if defined(XP_WIN)
#include <windows.h>
#include <stdlib.h>
#elif defined(XP_UNIX)
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#endif

#include <stdio.h>
#include <stdarg.h>
#include <string.h>

#include "nsCOMPtr.h"
#include "nsIFile.h"
#include "nsStringGlue.h"

#ifdef XP_WIN
// we want a wmain entry point
#include "nsWindowsWMain.cpp"
#define strcasecmp _stricmp
#endif

#ifdef MOZ_WIDGET_GONK
#include "BootAnimation.h"
#endif

#include "BinaryPath.h"

#include "nsXPCOMPrivate.h" // for MAXPATHLEN and XPCOM_DLL

#ifdef MOZ_WIDGET_GONK
# include <binder/ProcessState.h>
#endif

#include "mozilla/Telemetry.h"
#include "mozilla/WindowsDllBlocklist.h"

static void Output(const char *fmt, ... )
{
  va_list ap;
  va_start(ap, fmt);

#if defined(XP_WIN) && !MOZ_WINCONSOLE
  wchar_t msg[2048];
  _vsnwprintf(msg, sizeof(msg)/sizeof(msg[0]), NS_ConvertUTF8toUTF16(fmt).get(), ap);
  MessageBoxW(nullptr, msg, L"XULRunner", MB_OK | MB_ICONERROR);
#else
  vfprintf(stderr, fmt, ap);
#endif

  va_end(ap);
}

/**
 * Return true if |arg| matches the given argument name.
 */
static bool IsArg(const char* arg, const char* s)
{
  if (*arg == '-')
  {
    if (*++arg == '-')
      ++arg;
    return !strcasecmp(arg, s);
  }

#if defined(XP_WIN)
  if (*arg == '/')
    return !strcasecmp(++arg, s);
#endif

  return false;
}

/**
 * A helper class which calls NS_LogInit/NS_LogTerm in its scope.
 */
class ScopedLogging
{
public:
  ScopedLogging() { NS_LogInit(); }
  ~ScopedLogging() { NS_LogTerm(); }
};

XRE_GetFileFromPathType XRE_GetFileFromPath;
XRE_CreateAppDataType XRE_CreateAppData;
XRE_FreeAppDataType XRE_FreeAppData;
XRE_TelemetryAccumulateType XRE_TelemetryAccumulate;
XRE_mainType XRE_main;

static const nsDynamicFunctionLoad kXULFuncs[] = {
    { "XRE_GetFileFromPath", (NSFuncPtr*) &XRE_GetFileFromPath },
    { "XRE_CreateAppData", (NSFuncPtr*) &XRE_CreateAppData },
    { "XRE_FreeAppData", (NSFuncPtr*) &XRE_FreeAppData },
    { "XRE_TelemetryAccumulate", (NSFuncPtr*) &XRE_TelemetryAccumulate },
    { "XRE_main", (NSFuncPtr*) &XRE_main },
    { nullptr, nullptr }
};

static int do_main(int argc, char* argv[])
{
  nsCOMPtr<nsIFile> appini;
  nsresult rv;

  // Allow firefox.exe to launch XULRunner apps via -app <application.ini>
  // Note that -app must be the *first* argument.
  const char *appDataFile = getenv("XUL_APP_FILE");
  if (appDataFile && *appDataFile) {
    rv = XRE_GetFileFromPath(appDataFile, getter_AddRefs(appini));
    if (NS_FAILED(rv)) {
      Output("Invalid path found: '%s'", appDataFile);
      return 255;
    }
  }
  else if (argc > 1 && IsArg(argv[1], "app")) {
    if (argc == 2) {
      Output("Incorrect number of arguments passed to -app");
      return 255;
    }

    rv = XRE_GetFileFromPath(argv[2], getter_AddRefs(appini));
    if (NS_FAILED(rv)) {
      Output("application.ini path not recognized: '%s'", argv[2]);
      return 255;
    }

    char appEnv[MAXPATHLEN];
    snprintf(appEnv, MAXPATHLEN, "XUL_APP_FILE=%s", argv[2]);
    if (putenv(strdup(appEnv))) {
      Output("Couldn't set %s.\n", appEnv);
      return 255;
    }
    argv[2] = argv[0];
    argv += 2;
    argc -= 2;
  }

#ifdef MOZ_WIDGET_GONK
  /* Start boot animation */
  mozilla::StartBootAnimation();
#endif

  if (appini) {
    nsXREAppData *appData;
    rv = XRE_CreateAppData(appini, &appData);
    if (NS_FAILED(rv)) {
      Output("Couldn't read application.ini");
      return 255;
    }
    int result = XRE_main(argc, argv, appData, 0);
    XRE_FreeAppData(appData);
    return result;
  }

  return XRE_main(argc, argv, &sAppData, 0);
}

int main(int argc, char* argv[])
{
  char exePath[MAXPATHLEN];

#ifdef MOZ_WIDGET_GONK
  // This creates a ThreadPool for binder ipc. A ThreadPool is necessary to
  // receive binder calls, though not necessary to send binder calls.
  // ProcessState::Self() also needs to be called once on the main thread to
  // register the main thread with the binder driver.
  android::ProcessState::self()->startThreadPool();
#endif

  nsresult rv;
  rv = mozilla::BinaryPath::Get(argv[0], exePath);
  if (NS_FAILED(rv)) {
    Output("Couldn't calculate the application directory.\n");
    return 255;
  }

  char *lastSlash = strrchr(exePath, XPCOM_FILE_PATH_SEPARATOR[0]);
  if (!lastSlash || ((lastSlash - exePath) + sizeof(XPCOM_DLL) + 1 > MAXPATHLEN))
    return 255;

  strcpy(++lastSlash, XPCOM_DLL);

#if defined(XP_UNIX)
  // If the b2g app is launched from adb shell, then the shell will wind
  // up being the process group controller. This means that we can't send
  // signals to the process group (useful for profiling).
  // We ignore the return value since setsid() fails if we're already the
  // process group controller (the normal situation).
  (void)setsid();
#endif

#ifdef HAS_DLL_BLOCKLIST
  DllBlocklist_Initialize();
#endif

  // We do this because of data in bug 771745
  XPCOMGlueEnablePreload();

  rv = XPCOMGlueStartup(exePath);
  if (NS_FAILED(rv)) {
    Output("Couldn't load XPCOM.\n");
    return 255;
  }
  // Reset exePath so that it is the directory name and not the xpcom dll name
  *lastSlash = 0;

  rv = XPCOMGlueLoadXULFunctions(kXULFuncs);
  if (NS_FAILED(rv)) {
    Output("Couldn't load XRE functions.\n");
    return 255;
  }

  int result;
  {
    ScopedLogging log;
    char **_argv;

    /*
     * Duplicate argument vector to conform non-const argv of
     * do_main() since XRE_main() is very stupid with non-const argv.
     */
    _argv = new char *[argc + 1];
    for (int i = 0; i < argc; i++) {
      size_t len = strlen(argv[i]) + 1;
      _argv[i] = new char[len];
      MOZ_ASSERT(_argv[i] != nullptr);
      memcpy(_argv[i], argv[i], len);
    }
    _argv[argc] = nullptr;

    result = do_main(argc, _argv);

    for (int i = 0; i < argc; i++) {
      delete[] _argv[i];
    }
    delete[] _argv;
  }

  return result;
}