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osystem_ds.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */


#include "common/scummsys.h"
#include "common/system.h"
#include "system.h"

#include "common/util.h"
#include "common/rect.h"
#include "common/savefile.h"

#include "osystem_ds.h"
#include "nds.h"
#include "dsmain.h"
#include "nds/registers_alt.h"
#include "config-manager.h"
#include "common/str.h"
#include "cdaudio.h"
#include "graphics/surface.h"
#include "touchkeyboard.h"

OSystem_DS* OSystem_DS::_instance = NULL;

OSystem_DS::OSystem_DS()
      : eventNum(0), lastPenFrame(0), queuePos(0), _mixer(NULL), _timer(NULL), _frameBufferExists(false)
{
//    eventNum = 0;
//    lastPenFrame = 0;
//    queuePos = 0;
      _instance = this;
//    _mixer = NULL;
  //  _timer = NULL;
      //_frameBufferExists = false;
}

OSystem_DS::~OSystem_DS() {
      delete _mixer;
      delete _timer;
}

int OSystem_DS::timerHandler(int t)
{
      DSTimerManager *tm = (DSTimerManager *)g_system->getTimerManager();
      tm->handler();
      return t;
}
   
void OSystem_DS::initBackend() {
      ConfMan.setInt("autosave_period", 0);
      ConfMan.setBool("FM_medium_quality", true);

      _mixer = new DSAudioMixer;
      _timer = new DSTimerManager;
      DS::setSoundProc(Audio::Mixer::mixCallback, _mixer);
    DS::setTimerCallback(&OSystem_DS::timerHandler, 10);
    
      OSystem::initBackend();
}

bool OSystem_DS::hasFeature(Feature f) {
//    consolePrintf("hasfeature\n");
      return (f == kFeatureVirtualKeyboard);
}

void OSystem_DS::setFeatureState(Feature f, bool enable) {
//    consolePrintf("setfeature f=%d e=%d\n", f, enable);
      if (f == kFeatureVirtualKeyboard) DS::setKeyboardIcon(enable);
}

bool OSystem_DS::getFeatureState(Feature f) {
//    consolePrintf("getfeat\n");
      if (f == kFeatureVirtualKeyboard) return DS::getKeyboardIcon();
      return false;
}

const OSystem::GraphicsMode* OSystem_DS::getSupportedGraphicsModes() const {
      return s_supportedGraphicsModes;
}


int OSystem_DS::getDefaultGraphicsMode() const {
      return 0;
}

bool OSystem_DS::setGraphicsMode(int mode) {
      return true;
}

bool OSystem_DS::setGraphicsMode(const char *name) {
//    consolePrintf("Set gfx mode %s\n", name);
      return true;
}

int OSystem_DS::getGraphicsMode() const {
      return -1;
}

void OSystem_DS::initSize(uint width, uint height) {
//    consolePrintf("Set gfx mode %d x %d\n", width, height);
      DS::setGameSize(width, height);
}

int16 OSystem_DS::getHeight() {
      return 200;
}

int16 OSystem_DS::getWidth() {
      return 320;
}

void OSystem_DS::setPalette(const byte *colors, uint start, uint num) {
//    consolePrintf("Set palette %d, %d colours\n", start, num);
//return;
      if (!DS::getIsDisplayMode8Bit()) return;
      for (unsigned int r = start; r < start + num; r++) {
            int red = *colors;
            int green = *(colors + 1);
            int blue = *(colors + 2);
            
            red >>= 3;
            green >>= 3;
            blue >>= 3;
            
//          if (r != 255)
            {           
                  BG_PALETTE[r] = red | (green << 5) | (blue << 10);
                  if (!DS::getKeyboardEnable()) {
                        BG_PALETTE_SUB[r] = red | (green << 5) | (blue << 10);
                  }
            }
//          if (num == 16) consolePrintf("pal:%d r:%d g:%d b:%d\n", r, red, green, blue);
            
            colors += 4;
      }
}

bool OSystem_DS::grabRawScreen(Graphics::Surface* surf) {
      surf->create(DS::getGameWidth(), DS::getGameHeight(), 1);

      // Ensure we copy using 16 bit quantities due to limitation of VRAM addressing
      

      u16* image = (u16 *) DS::get8BitBackBuffer();
      for (int y = 0; y <  DS::getGameHeight(); y++)
      {
            DC_FlushRange(image + (y << 8), DS::getGameWidth());
            for (int x = 0; x < DS::getGameWidth() >> 1; x++)
            {
                  *(((u16 *) (surf->pixels)) + y * (DS::getGameWidth() >> 1) + x) = image[y << 8 + x];
            }
      }

      return true;
}

void OSystem_DS::grabPalette(unsigned char *colors, uint start, uint num) {
//    consolePrintf("Grabpalette");
      
      for (unsigned int r = start; r < start + num; r++) {
            *colors++ = (BG_PALETTE[r] & 0x001F) << 3;
            *colors++ = (BG_PALETTE[r] & 0x03E0) >> 5 << 3;
            *colors++ = (BG_PALETTE[r] & 0x7C00) >> 10 << 3;
      }
}


void OSystem_DS::copyRectToScreen(const byte *buf, int pitch, int x, int y, int w, int h)
{
//    consolePrintf("Copy rect %d, %d   %d, %d ", x, y, w, h);
      
      if (w <= 1) return;
      if (h < 0) return;
      if (!DS::getIsDisplayMode8Bit()) return;
      
      u16* bg;
      s32 stride;
      u16* bgSub = (u16 *) BG_GFX_SUB;

      if (_frameBufferExists) {
            bg = (u16 *) _framebuffer.pixels;
            stride = _framebuffer.pitch;
      } else {
            bg = (u16 *) DS::get8BitBackBuffer();
            stride = DS::get8BitBackBufferStride();
      }

      u16* src = (u16 *) buf;
      
      if (DS::getKeyboardEnable()) {
      
            for (int dy = y; dy < y + h; dy++) {
                  u16* dest = bg + (dy * (stride >> 1)) + (x >> 1);
            
                  DC_FlushRange(src, w << 1);
                  DC_FlushRange(dest, w << 1);
                  dmaCopyHalfWords(3, src, dest, w);
                              
                  src += pitch >> 1;
            }
      
      } else {
            for (int dy = y; dy < y + h; dy++) {
                  u16* dest1 = bg + (dy * (stride >> 1)) + (x >> 1);
                  u16* dest2 = bgSub + (dy << 8) + (x >> 1);
                  
                  DC_FlushRange(src, w << 1);
                  DC_FlushRange(dest1, w << 1);
                  DC_FlushRange(dest2, w << 1);
                              
                  dmaCopyHalfWords(3, src, dest1, w);
                  dmaCopyHalfWords(3, src, dest2, w);
                              
                  src += pitch >> 1;
            }
      }
      
//    consolePrintf("Done\n");
      
                  
      
}

void OSystem_DS::updateScreen()
{

      if ((_frameBufferExists) && (DS::getIsDisplayMode8Bit()))
      {
            _frameBufferExists = false;

            // Copy temp framebuffer back to screen
            copyRectToScreen((byte *)_framebuffer.pixels, _framebuffer.pitch, 0, 0, _framebuffer.w, _framebuffer.h);
      }

      DS::displayMode16BitFlipBuffer();
      DS::doSoundCallback();
//    DS::doTimerCallback();
      DS::addEventsToQueue();
}

void OSystem_DS::setShakePos(int shakeOffset) {
      DS::setShakePos(shakeOffset);
}

void OSystem_DS::showOverlay ()
{
//    consolePrintf("showovl\n");
      DS::displayMode16Bit();
}

void OSystem_DS::hideOverlay ()
{
      DS::displayMode8Bit();
}

void OSystem_DS::clearOverlay ()
{
      memset((u16 *) DS::get16BitBackBuffer(), 0, 512 * 256 * 2);
//    consolePrintf("clearovl\n");
}

void OSystem_DS::grabOverlay (OverlayColor *buf, int pitch)
{
//    consolePrintf("grabovl\n");
}

void OSystem_DS::copyRectToOverlay (const OverlayColor *buf, int pitch, int x, int y, int w, int h)
{
      u16* bg = (u16 *) DS::get16BitBackBuffer();
      u16* src = (u16 *) buf;
            
//    if (x + w > 256) w = 256 - x;
      //if (x + h > 256) h = 256 - y;

//    consolePrintf("Copy rect ovl %d, %d   %d, %d  %d\n", x, y, w, h, pitch);

      
      
      for (int dy = y; dy < y + h; dy++) {
            
            
            // Slow but save copy:
            for (int dx = x; dx < x + w; dx++) {
                  
                  *(bg + (dy * 512) + dx) = *src;
                  //if ((*src) != 0) consolePrintf("%d,%d: %d   ", dx, dy, *src);
                  //consolePrintf("%d,", *src);
                  src++;
            }
            src += (pitch - w);
            
            // Fast but broken copy: (why?)
            /*
            REG_IME = 0;
            dmaCopy(src, bg + (dy << 9) + x, w * 2);
            REG_IME = 1;
            
            src += pitch;*/
      }
                  
//    consolePrintf("Copy rect ovl done");

}

int16 OSystem_DS::getOverlayHeight()
{
//    consolePrintf("getovlheight\n");
      return getHeight();
}

int16 OSystem_DS::getOverlayWidth()
{
//    consolePrintf("getovlwid\n");
      return getWidth();
}

      
bool OSystem_DS::showMouse(bool visible)
{
      DS::setShowCursor(visible);
      return true;
}

void OSystem_DS::warpMouse(int x, int y)
{
}

void OSystem_DS::setMouseCursor(const byte *buf, uint w, uint h, int hotspotX, int hotspotY, byte keycolor, int targetCursorScale) {
      DS::setCursorIcon(buf, w, h, keycolor, hotspotX, hotspotY);
}

void OSystem_DS::addEvent(Common::Event& e) {
      eventQueue[queuePos++] = e;
}

bool OSystem_DS::pollEvent(Common::Event &event)
{

      if (lastPenFrame != DS::getMillis()) {

            if (eventNum == queuePos) {
                  eventNum = 0;
                  queuePos = 0;
                  // Bodge - this last event seems to be processed sometimes and not others.
                  // So we make it something harmless which won't cause any adverse effects.
                  event.type = Common::EVENT_KEYUP;
                  event.kbd.ascii = 0;
                  event.kbd.keycode = Common::KEYCODE_INVALID;
                  event.kbd.flags = 0;
//                consolePrintf("type: %d\n", event.type);
                  return false;
            } else {
                  event = eventQueue[eventNum++];
//                consolePrintf("type: %d\n", event.type);
                  return true;
            }
      }
      
      return false;

/*    if (lastPenFrame != DS::getMillis()) {
            if ((eventNum == 0)) {
                  event.type = Common::EVENT_MOUSEMOVE;
                  event.mouse = Common::Point(DS::getPenX(), DS::getPenY());
                  eventNum = 1;
                  return true;
            }
            if (eventNum == 1) {
                  eventNum = 0;
                  lastPenFrame = DS::getMillis();
                  if (DS::getPenDown()) { 
                        event.type = Common::EVENT_LBUTTONDOWN;
                        event.mouse = Common::Point(DS::getPenX(), DS::getPenY());
                        consolePrintf("Down %d, %d  ", event.mouse.x, event.mouse.y);
                        return true;
                  } else if (DS::getPenReleased()) {
                        event.type = Common::EVENT_LBUTTONUP;
                        event.mouse = Common::Point(DS::getPenX(), DS::getPenY());
                        consolePrintf("Up %d, %d ", event.mouse.x, event.mouse.y);
                        return true;
                  } else {
                        return false;
                  }
            }
      }*/

      return false;
}

uint32 OSystem_DS::getMillis()
{
      return DS::getMillis();
}

void OSystem_DS::delayMillis(uint msecs)
{
      int st = getMillis();
      DS::addEventsToQueue();
      DS::CD::update();
      
      DS::doSoundCallback();
      while (st + msecs >= getMillis()) {
            DS::doSoundCallback();
      }
      
      DS::doTimerCallback();
      DS::checkSleepMode();
      DS::addEventsToQueue();
}

OSystem::MutexRef OSystem_DS::createMutex(void)
{
      return NULL;
}

void OSystem_DS::lockMutex(MutexRef mutex)
{
}

void OSystem_DS::unlockMutex(MutexRef mutex)
{
}

void OSystem_DS::deleteMutex(MutexRef mutex)
{
}

void OSystem_DS::clearSoundCallback()
{
//    consolePrintf("Clearing sound callback");
//    DS::setSoundProc(NULL, NULL);
}

int OSystem_DS::getOutputSampleRate() const
{
      return DS::getSoundFrequency();
}

bool OSystem_DS::openCD(int drive)
{
      return DS::CD::checkCD();
}

bool OSystem_DS::pollCD()
{
      return DS::CD::isPlaying();
}

void OSystem_DS::playCD(int track, int num_loops, int start_frame, int duration)
{
      DS::CD::playTrack(track, num_loops, start_frame, duration);
}

void OSystem_DS::stopCD()
{
      DS::CD::stopTrack();
}

void OSystem_DS::updateCD()
{
}

void OSystem_DS::quit()
{
/*    consolePrintf("Soft resetting...");
      IPC->reset = 1;
      REG_IE = 0;
      
      asm("swi 0x26\n");
      swiSoftReset();*/
}

void OSystem_DS::setWindowCaption(const char *caption)
{
}

void OSystem_DS::displayMessageOnOSD(const char *msg)
{
}

Common::SaveFileManager* OSystem_DS::getSavefileManager()
{
      bool forceSram;

      if (ConfMan.hasKey("forcesramsave", "ds")) {
            forceSram = ConfMan.getBool("forcesramsave", "ds");
      } else {
            forceSram = false;
      }
      if (forceSram) { 
            consolePrintf("Using SRAM save method!\n");
      }
      
      if (DS::isGBAMPAvailable() && (!forceSram)) {
            return &mpSaveManager;
      } else {
            return &saveManager;
      }
}


Graphics::Surface* OSystem_DS::createTempFrameBuffer() {

      // Ensure we copy using 16 bit quantities due to limitation of VRAM addressing

      // If the scaler is enabled, we can just return the 8 bit back buffer, since it's in system memory
      // memory anyway.  Otherwise, we need to copy the back buffer into the memory normally used by the scaler buffer and
      // then return it.
      // We must make sure that once the frame buffer is created, future calls to copyRectToScreen() copy to this buffer

      if (DS::isCpuScalerEnabled()) {

            _framebuffer.pixels = DS::getScalerBuffer();
            _framebuffer.w = DS::getGameWidth();
            _framebuffer.h = DS::getGameHeight();
            _framebuffer.pitch = DS::getGameWidth();
            _framebuffer.bytesPerPixel = 1;


      } else {
      
            s32 height = DS::getGameHeight();
            s32 width = DS::getGameWidth();
            s32 stride = DS::get8BitBackBufferStride();
            
            u16* src = DS::get8BitBackBuffer();
            u16* dest = DS::getScalerBuffer();

            for (int y = 0; y < height; y++) {
                  
                  u16* destLine = dest + (y * (width / 2));
                  u16* srcLine = src + (y * (stride / 2));

                  DC_FlushRange(srcLine, width);
                              
                  dmaCopyHalfWords(3, srcLine, destLine, width);
            }

            _framebuffer.pixels = dest;
            _framebuffer.w = width;
            _framebuffer.h = height;
            _framebuffer.pitch = width;
            _framebuffer.bytesPerPixel = 1;

      }

      _frameBufferExists = true;

/*    
      size_t imageStrideInBytes = DS::get8BitBackBufferStride();
      size_t imageStrideInWords = imageStrideInBytes / 2;

      u16* image = (u16 *) DS::get8BitBackBuffer();
      for (int y = 0; y <  DS::getGameHeight(); y++) {
            DC_FlushRange(image + (y * imageStrideInWords), DS::getGameWidth());
            for (int x = 0; x < DS::getGameWidth() >> 1; x++) {
                  *(((u16 *) (_framebuffer.pixels)) + y * (DS::getGameWidth() >> 1) + x) = image[(y * imageStrideInWords) + x];
//                *(((u16 *) (surf->pixels)) + y * (DS::getGameWidth() >> 1) + x) = image[y * imageStrideInWords + x];
            }
      }*/

      return &_framebuffer;
}


Graphics::Surface *OSystem_DS::lockScreen() {
      if (!_frameBufferExists) {
            createTempFrameBuffer();
      }

      return &_framebuffer;
}

void OSystem_DS::unlockScreen() {
      // No need to do anything here.  The screen will be updated in updateScreen().
}

void OSystem_DS::setFocusRectangle(const Common::Rect& rect) {
      DS::setTalkPos(rect.left + rect.width() / 2, rect.top + rect.height() / 2);
}

void OSystem_DS::clearFocusRectangle() {

}


void OSystem_DS::addAutoComplete(const char *word) {
      DS::addAutoComplete((char *) word);
}

void OSystem_DS::clearAutoComplete() {
      DS::clearAutoComplete();
}

void OSystem_DS::setCharactersEntered(int count) {
      DS::setCharactersEntered(count);
}

OSystem *OSystem_DS_create() {
      return new OSystem_DS();
}




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