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/* Copyright (C) 2000  Free Software Foundation

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the

Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for

details.  */

#include <X11/Xlib.h>

#include <X11/Xutil.h>

#include <gcj/cni.h>

#include <gnu/gcj/xlib/Visual.h>

#include <gnu/gcj/xlib/Screen.h>

#include <gnu/gcj/xlib/Display.h>

#include <gnu/gcj/xlib/XException.h>

#include <gnu/gcj/RawData.h>

using namespace gnu::gcj;

void gnu::gcj::xlib::Visual::init(RawData* visual, jint depth)

{

  XVisualInfo* info = new XVisualInfo;

  xVisualInfo = reinterpret_cast<gnu::gcj::RawData*>(info);

  infoMask = 0;

  if (visual != 0)

    {

      ::Visual* visualStructure = (::Visual*) visual;

      info->visual = visualStructure;

      info->visualid = XVisualIDFromVisual(visualStructure);

      infoMask |= MASK_ID | MASK_VISUAL_STRUCTURE;

    }

  if (depth  != 0)

    {

      info->depth = depth;

      infoMask |= MASK_DEPTH;

    }

}

void gnu::gcj::xlib::Visual::finalize()

{

  if (xVisualInfo != 0)

    {

      delete xVisualInfo;

      xVisualInfo = 0;

    }

}

RawData* gnu::gcj::xlib::Visual::getVisualStructure()

{

    ensureXVisualInfo(MASK_ALL); // Make sure structure is set

    XVisualInfo* info = (XVisualInfo*) xVisualInfo;

    return reinterpret_cast<gnu::gcj::RawData*>(info->visual);

}

jint gnu::gcj::xlib::Visual::getRedMask()

{

  ensureXVisualInfo(MASK_RED);

  XVisualInfo* info = (XVisualInfo*) xVisualInfo;

  return info->red_mask;

}

jint gnu::gcj::xlib::Visual::getGreenMask()

{

  ensureXVisualInfo(MASK_GREEN);

  XVisualInfo* info = (XVisualInfo*) xVisualInfo;

  return info->green_mask;

}

jint gnu::gcj::xlib::Visual::getBlueMask()

{

  ensureXVisualInfo(MASK_BLUE);

  XVisualInfo* info = (XVisualInfo*) xVisualInfo;

  return info->blue_mask;

}

jint gnu::gcj::xlib::Visual::getScreenNumber()

{

  if (screen != 0)

    return screen->getScreenNumber();

  ensureXVisualInfo(MASK_SCREEN);

  XVisualInfo* info = (XVisualInfo*) xVisualInfo;

  return info->screen;

}

jint gnu::gcj::xlib::Visual::getDepth()

{

  ensureXVisualInfo(MASK_DEPTH);

  XVisualInfo* info = (XVisualInfo*) xVisualInfo;

  return info->depth;

}

jint gnu::gcj::xlib::Visual::getVisualClass()

{

  ensureXVisualInfo(MASK_CLASS);

  ::XVisualInfo* info = (::XVisualInfo*) xVisualInfo;

  return info->c_class;

}

void gnu::gcj::xlib::Visual::ensureXVisualInfo(jint requiredMask)

{

  int missingInformation = ~infoMask;

  if ((missingInformation & requiredMask) == 0)

    return;

  // We need more info...

  XVisualInfo* info = (XVisualInfo*) xVisualInfo;

  // Store everything we know into template

  if (screen != 0)

    {

      info->screen = screen->getScreenNumber();

      infoMask |= MASK_SCREEN;

    }

  // Aquire info using the current info as template for matching

  ::Display* dpy = (::Display*) display->display;

  int visualInfoCount;

  long mask = infoMask & MASK_ALL & (~MASK_VISUAL_STRUCTURE);

  XVisualInfo* matches = XGetVisualInfo(dpy, mask,

                                          info, &visualInfoCount);

  if (matches != 0)

    {

      (*info) = matches[0];

      // redundant?

      xVisualInfo = reinterpret_cast<gnu::gcj::RawData*>(info);

      infoMask = ~0; // ALL

      XFree(matches);

    }

  else

    {

      char msg[] =

        "XGetVisualInfo failed to find any matching visuals. The template "

        "describes a combination of properties that does not exist on "

        "this X server.";

      throw new XException(JvNewStringLatin1(msg));

    }

}