sdl_qwin.cc

SDL库 在进行视频显示程序spcaview安装时必须的库文件

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    [e-mail]
*/
#include "SDL_config.h"

#include "SDL_QWin.h"
#include <qapplication.h>
#include <qdirectpainter_qws.h>

screenRotationT screenRotation = SDL_QT_NO_ROTATION;

SDL_QWin::SDL_QWin(const QSize& size)
  : QWidget(0, "SDL_main"), my_painter(0), my_image(0),
    my_inhibit_resize(false), my_mouse_pos(-1,-1), my_flags(0),
    my_has_fullscreen(false), my_locked(0)
{
  setBackgroundMode(NoBackground);
}

SDL_QWin::~SDL_QWin() {
  // Nothing to do yet.
  if(my_image) {
    delete my_image;
  }
}

void SDL_QWin::setImage(QImage *image) {
  if ( my_image ) {
    delete my_image;
  }
  my_image = image;
  //  setFixedSize(image->size());
}

void SDL_QWin::resizeEvent(QResizeEvent *e) {
  if(size() != qApp->desktop()->size()) {
    // Widget is not the correct size, so do the fullscreen magic
    my_has_fullscreen = false;
    enableFullscreen();
  }
  if(my_inhibit_resize) {
    my_inhibit_resize = false;
  } else {
    SDL_PrivateResize(e->size().width(), e->size().height());
  }
}

void SDL_QWin::focusInEvent(QFocusEvent *) {
  // Always do it here, no matter the size.
  enableFullscreen();
  SDL_PrivateAppActive(true, SDL_APPINPUTFOCUS);
}

void SDL_QWin::focusOutEvent(QFocusEvent *) {
  my_has_fullscreen = false;
  SDL_PrivateAppActive(false, SDL_APPINPUTFOCUS);
}

void SDL_QWin::closeEvent(QCloseEvent *e) {
  SDL_PrivateQuit();
  e->ignore();
}

void SDL_QWin::setMousePos(const QPoint &pos) {
  if(my_image->width() == height()) {
    if (screenRotation == SDL_QT_ROTATION_90)
      my_mouse_pos = QPoint(height()-pos.y(), pos.x());
    else if (screenRotation == SDL_QT_ROTATION_270)
      my_mouse_pos = QPoint(pos.y(), width()-pos.x());
  } else {
    my_mouse_pos = pos;
  }
}

void SDL_QWin::mouseMoveEvent(QMouseEvent *e) {
  Qt::ButtonState button = e->button();
  int sdlstate = 0;
  if( (button & Qt::LeftButton)) {
    sdlstate |= SDL_BUTTON_LMASK;
  }
  if( (button & Qt::RightButton)) {
    sdlstate |= SDL_BUTTON_RMASK;
  }
  if( (button & Qt::MidButton)) {
    sdlstate |= SDL_BUTTON_MMASK;
  }
  setMousePos(e->pos());
  SDL_PrivateMouseMotion(sdlstate, 0, my_mouse_pos.x(), my_mouse_pos.y());
}

void SDL_QWin::mousePressEvent(QMouseEvent *e) {
  mouseMoveEvent(e);
  Qt::ButtonState button = e->button();
  SDL_PrivateMouseButton(SDL_PRESSED,
			 (button & Qt::LeftButton) ? 1 :
			 ((button & Qt::RightButton) ? 2 : 3),
			 my_mouse_pos.x(), my_mouse_pos.y());
}

void SDL_QWin::mouseReleaseEvent(QMouseEvent *e) {
  setMousePos(e->pos());
  Qt::ButtonState button = e->button();
  SDL_PrivateMouseButton(SDL_RELEASED,
			 (button & Qt::LeftButton) ? 1 :
			 ((button & Qt::RightButton) ? 2 : 3),
			 my_mouse_pos.x(), my_mouse_pos.y());
  my_mouse_pos = QPoint(-1, -1);
}

static inline void
gs_fastRotateBlit_3 ( unsigned short *fb,
		      unsigned short *bits,
		      const QRect& rect )
{
  // FIXME: this only works correctly for 240x320 displays
  int startx, starty;
  int width, height;
  
  startx = rect.left() >> 1;
  starty = rect.top() >> 1;
  width  = ((rect.right() - rect.left()) >> 1) + 2;
  height = ((rect.bottom() - rect.top()) >> 1) + 2;

  if((startx+width) > 120) {
    width = 120 - startx; // avoid horizontal overflow
  }
  if((starty+height) > 160) { 
    height = 160 - starty; // avoid vertical overflow
  }

  ulong *sp1, *sp2, *dp1, *dp2;
  ulong stop, sbot, dtop, dbot;    
  
  sp1 = (ulong*)bits + startx + starty*240;
  sp2 = sp1 + 120;
  dp1 = (ulong *)fb + (159 - starty) + startx*320;
  dp2 = dp1 + 160;
  int rowadd = (-320*width) - 1;
  int rowadd2 = 240 - width;
  // transfer in cells of 2x2 pixels in words
  for (int y=0; y<height; y++) {
    for (int x=0; x<width; x++) {
      // read source pixels
      stop = *sp1;
      sbot = *sp2;
      // rotate pixels
      dtop = (sbot & 0xffff) + ((stop & 0xffff)<<16);
      dbot = ((sbot & 0xffff0000)>>16) + (stop & 0xffff0000);
      // write to framebuffer
      *dp1 = dtop;
      *dp2 = dbot;
      // update source ptrs
      sp1++; sp2++;
      // update dest ptrs - 2 pix at a time
      dp1 += 320;
      dp2 += 320;
    }
    // adjust src ptrs - skip a row as we work in pairs
    sp1 += rowadd2;
    sp2 += rowadd2;
    // adjust dest ptrs for rotation
    dp1 += rowadd;
    dp2 += rowadd;
  }
}

static inline void
gs_fastRotateBlit_1 ( unsigned short *fb,
		      unsigned short *bits,
		      const QRect& rect ) {
  // FIXME: this only works correctly for 240x320 displays
  int startx, starty;
  int width, height;

  startx = rect.left() >> 1;
  starty = rect.top() >> 1;
  width  = ((rect.right() - rect.left()) >> 1) + 2;
  height = ((rect.bottom() - rect.top()) >> 1) + 2;

  if((startx+width) > 120) {
    width = 120 - startx; // avoid horizontal overflow
  }
  if((starty+height) > 160) { 
    height = 160 - starty; // avoid vertical overflow
  }

  ulong *sp1, *sp2, *dp1, *dp2;
  ulong stop, sbot, dtop, dbot;    
  fb += 320*239; // Move "fb" to top left corner
  sp1 = (ulong*)bits + startx + starty*240;
  sp2 = sp1 + 120;
  dp1 = (ulong*)fb - startx * 320 - starty;
  dp2 = dp1 - 160;
  int rowadd = (320*width) + 1;
  int rowadd2 = 240 - width;
  // transfer in cells of 2x2 pixels in words
  for (int y=0; y<height; y++) {
    for (int x=0; x<width; x++) {
      // read
      stop = *sp1;
      sbot = *sp2;
      // rotate
      dtop = (stop & 0xffff) + ((sbot & 0xffff)<<16);
      dbot = ((stop & 0xffff0000)>>16) + (sbot & 0xffff0000);
      // write
      *dp1 = dtop;
      *dp2 = dbot;
      // update source ptrs
      sp1++; sp2++;
      // update dest ptrs - 2 pix at a time
      dp1 -= 320;
      dp2 -= 320;
    }
    // adjust src ptrs - skip a row as we work in pairs
    sp1 += rowadd2;
    sp2 += rowadd2;
    // adjust dest ptrs for rotation
    dp1 += rowadd;
    dp2 += rowadd;
  }
}

// desktop, SL-A300 etc
bool SDL_QWin::repaintRotation0(const QRect& rect) {
  if(my_image->width() == width()) {
    uchar *fb = (uchar*)my_painter->frameBuffer();
    uchar *buf = (uchar*)my_image->bits();
    if(rect == my_image->rect()) {
      SDL_memcpy(fb, buf, width()*height()*2);
    } else {
      int h = rect.height();
      int wd = rect.width()<<1;
      int fblineadd = my_painter->lineStep();
      int buflineadd = my_image->bytesPerLine();
      fb  += (rect.left()<<1) + rect.top() * my_painter->lineStep();
      buf += (rect.left()<<1) + rect.top() * my_image->bytesPerLine();
      while(h--) {
	SDL_memcpy(fb, buf, wd);
	fb += fblineadd;
	buf += buflineadd;
      }
    }
  } else {
    return false; // FIXME: Landscape
  }
#ifdef __i386__