/*****************************************************************************************
 Copyright (c) 2002 The UbixOS Project
 All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of
conditions, the following disclaimer and the list of authors.  Redistributions in binary
form must reproduce the above copyright notice, this list of conditions, the following
disclaimer and the list of authors in the documentation and/or other materials provided
with the distribution. Neither the name of the UbixOS Project nor the names of its
contributors may be used to endorse or promote products derived from this software
without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 $Log$
 Revision 1.3  2004/07/28 15:05:43  reddawg
 Major:
   Pages now have strict security enforcement.
   Many null dereferences have been resolved.
   When apps loaded permissions set for pages rw and ro

 Revision 1.2  2004/05/19 17:09:50  flameshadow
 chg: Undid previous renaming. This now restores me as the EOOUIAD.

 Revision 1.1.1.1  2004/04/15 12:07:17  reddawg
 UbixOS v1.0

 Revision 1.20  2004/04/13 16:36:33  reddawg
 Changed our copyright, it is all now under a BSD-Style license



 $Id$

*****************************************************************************************/

#include <objgfx40/objgfx40.h>
#include <objgfx40/defpal.inc>
#include <sde/ogDisplay_UbixOS.h>

extern "C" {
  #include <lib/bioscall.h>
  #include <vmm/paging.h>
  #include <lib/kprintf.h>
  #include <sys/io.h>
  #include <lib/string.h>
  #include <ubixos/sched.h>
  #include <ubixos/kpanic.h>
  }

/*
 *
 *              ogDisplay methods
 *
 */

void
initVESAMode(uInt16 mode) {
  //kprintf("Pre-initVESAMode\n");
  biosCall(0x10,0x4F02,mode,0x0,0x0,0x0,0x0,0x0,0x0);
  //kprintf("Post-initVESAMode\n");
  return;
}

ogDisplay_UbixOS::ogDisplay_UbixOS(void) {
  pages[0] = pages[1] = NULL;
  activePage = visualPage = 0;
  pal = new ogRGBA8[256];
  attributes = new ogAttributes();

  VESAInfo = (ogVESAInfo *)0x11000;
  modeInfo = (ogModeInfo *)0x11200;
  GetVESAInfo();
  return;
} // ogDisplay_UbixOS::ogDisplay_UbixOS

void
ogDisplay_UbixOS::GetModeInfo(uInt16 mode) {
  //kprintf("Pre-getModeInfo\n");
  biosCall(0x10,0x4F01,0x0,mode,0x0,0x0,0x0,0x1120,0x0);
  //kprintf("Post-getModeInfo\n");
  return;
} // ogDisplay_UbixOS::GetModeInfo

void
ogDisplay_UbixOS::GetVESAInfo(void) {
  VESAInfo->VBESignature[0] = 'V'; // First off initialize the structure.
  VESAInfo->VBESignature[1] = 'B';
  VESAInfo->VBESignature[2] = 'E';
  VESAInfo->VBESignature[3] = '2';
  //kprintf("Pre-getVESAInfo\n");
  biosCall(0x10,0x4F00,0x0,0x0,0x0,0x0,0x0,0x1100,0x0);
  //kprintf("Post-getVESAInfo\n");
  return;
  } // ogDisplay_UbixOS::GetVESAInfo

uInt16
ogDisplay_UbixOS::FindMode(uInt32 _xRes, uInt32 _yRes, uInt32 _BPP) {
  uInt16 mode;

  if ((_xRes == 320) && (_yRes == 200) && (_BPP == 8)) return 0x13;

//  if ((VESAInfo==NULL) || (VESAInfo->videoModePtr==NULL)) return 0;
  if (modeInfo == NULL) return 0;

  for (mode = 0x100; mode < 0x1FF; mode++) {
    GetModeInfo(mode);
    if ((modeInfo->xRes >= _xRes) && (modeInfo->yRes >= _yRes) &&
        (modeInfo->bitsPerPixel == _BPP))
      return mode;
  }

  return 0;
} // ogDisplay_UbixOS::FindMode

void ogDisplay_UbixOS::SetMode(uInt16 mode) {

  uInt32 size = 0x0, count = 0x0, i = 0x0;
  
  if (mode == 0x13) {
  
    xRes = 320;
    yRes = 200;
    maxX = 319;
    maxY = 199;
    BPP  = 8;
    bytesPerPix = 1;

    redFieldPosition = 0;
    greenFieldPosition = 0;
    blueFieldPosition = 0;
    alphaFieldPosition = 0;
    
    redShifter = 0;
    greenShifter = 0;
    blueShifter = 0;
    alphaFieldPosition = 0;

    // UBU, THIS IS NULL BECAUSE WE DON'T EVER USE 320x200x256c!
    // THIS COMMENT WILL COME BACK TO BITE YOU ON THE ASS
    buffer = NULL;
 
  } else {
    buffer = NULL;
    mode |= 0x4000;  // attempt lfb
    GetModeInfo(mode);
    if (modeInfo->physBasePtr == 0) return;
    buffer = (void *)modeInfo->physBasePtr;    
    size = (modeInfo->yRes*modeInfo->bytesPerLine+4095);
    
    xRes = modeInfo->bytesPerLine;
    yRes = modeInfo->yRes;
    maxX = modeInfo->xRes-1;
    maxY = yRes-1;

    BPP = modeInfo->bitsPerPixel;
    bytesPerPix = (BPP + 7) >> 3;

    redFieldPosition   = modeInfo->redFieldPosition;
    greenFieldPosition = modeInfo->greenFieldPosition;
    blueFieldPosition  = modeInfo->blueFieldPosition;
    alphaFieldPosition = modeInfo->alphaFieldPosition;

    if (bytesPerPix == 4) {
      modeInfo->alphaMaskSize = 8;
      while ((alphaFieldPosition == redFieldPosition) ||
             (alphaFieldPosition == greenFieldPosition) ||
             (alphaFieldPosition == blueFieldPosition))
        alphaFieldPosition += 8;
    } // if
    
    redShifter   = 8-modeInfo->redMaskSize;
    greenShifter = 8-modeInfo->greenMaskSize;
    blueShifter  = 8-modeInfo->blueMaskSize;
    alphaShifter = 8-modeInfo->alphaMaskSize;

    if (modeInfo->alphaMaskSize != 0)
      alphaMasker = ~(OG_MASKS[modeInfo->alphaMaskSize] << alphaFieldPosition);
    else
      alphaMasker = ~0;

  } // else not mode 0x13
  
  printOff = 0;
  for (i = 0x0; i < ((size)/4096); i++) {
    if ((vmm_remapPage(modeInfo->physBasePtr + (i * 0x1000),modeInfo->physBasePtr + (i * 0x1000),KERNEL_PAGE_DEFAULT)) == 0x0)
      kpanic("Error: vmm_remapPage failed\n");
  } // for i

  owner = this;
  dataState = ogAliasing;

  initVESAMode(mode);

  if ((lineOfs != NULL) && (lSize != 0)) delete [] lineOfs;
  lSize = yRes*sizeof(uInt32);
  lineOfs = new uInt32[yRes];;
  if (lineOfs == NULL) return;
  
  lineOfs[0] = 0;
  for (count = 1; count < yRes; count++)
    lineOfs[count] = lineOfs[count-1]+xRes;

  if (1 == bytesPerPix) {
    pixFmtID = 0x08080808;
  } else {
    pixFmtID = (redFieldPosition) |
               (greenFieldPosition << 8) |
               (blueFieldPosition << 16) |
               (alphaFieldPosition << 24);
  } // else

  ogSetAntiAliasing(BPP > 8);
  if (pal == NULL) pal = new ogRGBA8[256];  
  ogSetPalette(DEFAULT_PALETTE);
  
  return;
} // ogDisplay_UbixOS::SetMode

void
ogDisplay_UbixOS::ogSetPalette(const ogRGBA8 newPal[256]) {
  ogSurface::ogSetPalette(newPal);
  SetPal();
  return;
} // ogDisplay_UbixOS::ogSetPalette

void ogDisplay_UbixOS::SetPal(void) {
  if (bytesPerPix != 1) return;
  outportByte(0x3c8,0);
  for (uInt32 c = 0; c < 256; c++) {
    outportByte(0x3c9, pal[c].red >> 2);
    outportByte(0x3c9, pal[c].green >> 2);
    outportByte(0x3c9, pal[c].blue >> 2);
  } // for
  return;
} // ogDisplay_UbixOS::SetPal

bool
ogDisplay_UbixOS::ogAlias(ogSurface& SrcObject, uInt32 x1,
                          uInt32 y1, uInt32 x2, uInt32 y2) {
  ogSetLastError(ogNoAliasing);
  return false;
} // ogDisplay_UbixOS::ogAlias

bool
ogDisplay_UbixOS::ogCreate(uInt32 _xRes, uInt32 _yRes,ogPixelFmt _pixFormat) {
  uInt16 mode;
  mode = 0x114;  // was 0x111
  SetMode(mode);
  /*
  mode = FindMode(_xRes, _yRes, _pixFormat.BPP);
  if ((mode == 0) && ((_pixFormat.BPP==24) || (_pixFormat.BPP==32))) {
    if (_pixFormat.BPP==24) _pixFormat.BPP=32; else _pixFormat.BPP=24;
    mode=FindMode(_xRes,_yRes,_pixFormat.BPP);
  } // if
  if (mode!=0) SetMode(mode);
  */
  return (mode!=0);
} // ogDisplay_UbixOS::ogCreate

bool
ogDisplay_UbixOS::ogClone(ogSurface& SrcObject) {
  ogSetLastError(ogNoCloning);
  return false;
} // ogDisplay_UbixOS::ogClone

void
ogDisplay_UbixOS::ogCopyPalette(ogSurface& SrcObject) {
  ogSurface::ogCopyPalette(SrcObject);
  SetPal();
  return;
} // ogDisplay_UbixOS::ogCopyPalette

bool
ogDisplay_UbixOS::ogLoadPalette(const char *palfile) {
  bool result;
  if ((result = ogSurface::ogLoadPalette(palfile))==true) SetPal();
  return result;
} // ogDisplay_UbixOS::ogLoadPalette

void
ogDisplay_UbixOS::ogSetPalette(uInt8 colour, uInt8 red, uInt8 green, uInt8 blue) {
  if (pal == NULL) return;
  ogSurface::ogSetPalette(colour, red, green, blue);
  outportByte(0x3c8, colour);
  outportByte(0x3c9, red >> 2);
  outportByte(0x3c9, green >> 2);
  outportByte(0x3c9, blue >> 2);
  
  return;
} // ogDisplay_UbixOS::ogSetPalette

void
ogDisplay_UbixOS::ogSetPalette(uInt8 colour, uInt8 red, uInt8 green,
                                   uInt8 blue, uInt8 alpha) {
  if (pal == NULL) return;
  ogSurface::ogSetPalette(colour, red, green, blue, alpha);
  outportByte(0x3c8, colour);
  outportByte(0x3c9, red >> 2);
  outportByte(0x3c9, green >> 2);
  outportByte(0x3c9, blue >> 2);
  
  return;
} // ogDisplay_UbixOS::ogSetPalette

ogDisplay_UbixOS::~ogDisplay_UbixOS(void) {
  delete attributes;
  delete pal;
//mji  delete VESAInfo;
//mji  delete modeInfo;
  return;
} // ogDisplay_UbixOS::~ogDisplay_UbixOS

/***
 END
 ***/