KernelLand/Kernel/drv/vterm_output.c

   1 /*
   2  * Acess2 Kernel
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * drv/vterm_input.c
   6  * - Virtual Terminal - Input code
   7  */
   8 #include "vterm.h"
   9 #include <api_drv_video.h>
  10 #define DEBUG   0
  11
  12 // === CODE ===
  13 /**
  14  * \fn void VT_InitOutput()
  15  * \brief Initialise Video Output
  16  */
  17 void VT_InitOutput()
  18 {
  19         giVT_OutputDevHandle = VFS_Open(gsVT_OutputDevice, VFS_OPENFLAG_WRITE);
  20         if(giVT_OutputDevHandle == -1) {
  21                 Log_Warning("VTerm", "Oh F**k, I can't open the video device '%s'", gsVT_OutputDevice);
  22                 return ;
  23         }
  24         VT_SetResolution( giVT_RealWidth, giVT_RealHeight );
  25         VT_SetTerminal( 0 );
  26         VT_SetMode( VIDEO_BUFFMT_TEXT );
  27         LOG("VTerm output initialised");
  28 }
  29
  30 /**
  31  * \brief Set video output buffer mode
  32  */
  33 void VT_SetMode(int Mode)
  34 {
  35         VFS_IOCtl( giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &Mode );
  36 }
  37
  38 /**
  39  * \fn void VT_int_ScrollFramebuffer( tVTerm *Term, int Count )
  40  * \note Scrolls the framebuffer down by \a Count text lines
  41  */
  42 void VT_int_ScrollFramebuffer( tVTerm *Term, int Count )
  43 {
  44          int    tmp;
  45         struct {
  46                 Uint8   Op;
  47                 Uint16  DstX, DstY;
  48                 Uint16  SrcX, SrcY;
  49                 Uint16  W, H;
  50         } PACKED        buf;
  51
  52         // Only update if this is the current terminal
  53         if( Term != gpVT_CurTerm )      return;
  54
  55         if( Count > Term->ScrollHeight )        Count = Term->ScrollHeight;
  56         if( Count < -Term->ScrollHeight )       Count = -Term->ScrollHeight;
  57
  58         // Switch to 2D Command Stream
  59         tmp = VIDEO_BUFFMT_2DSTREAM;
  60         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp);
  61
  62         // BLIT to 0,0 from 0,giVT_CharHeight
  63         buf.Op = VIDEO_2DOP_BLIT;
  64         buf.SrcX = 0;   buf.DstX = 0;
  65         // TODO: Don't assume character dimensions
  66         buf.W = Term->TextWidth * giVT_CharWidth;
  67         if( Count > 0 )
  68         {
  69                 buf.SrcY = (Term->ScrollTop+Count) * giVT_CharHeight;
  70                 buf.DstY = Term->ScrollTop * giVT_CharHeight;
  71         }
  72         else    // Scroll up, move text down
  73         {
  74                 Count = -Count;
  75                 buf.SrcY = Term->ScrollTop * giVT_CharHeight;
  76                 buf.DstY = (Term->ScrollTop+Count) * giVT_CharHeight;
  77         }
  78         buf.H = (Term->ScrollHeight-Count) * giVT_CharHeight;
  79         VFS_WriteAt(giVT_OutputDevHandle, 0, sizeof(buf), &buf);
  80
  81         // Restore old mode (this function is only called during text mode)
  82         tmp = VIDEO_BUFFMT_TEXT;
  83         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETBUFFORMAT, &tmp);
  84 }
  85
  86 void VT_int_UpdateCursor( tVTerm *Term, int bShow )
  87 {
  88         tVideo_IOCtl_Pos        csr_pos;
  89
  90         if( Term != gpVT_CurTerm )      return ;
  91
  92         if( !bShow )
  93         {
  94                 csr_pos.x = -1;
  95                 csr_pos.y = -1;
  96         }
  97         else if( Term->Mode == TERM_MODE_TEXT )
  98         {
  99                  int    offset;
 100
 101 //              if( !(Term->Flags & VT_FLAG_SHOWCSR)
 102 //               && ( (Term->Flags & VT_FLAG_HIDECSR) || !Term->Node.ReadThreads)
 103 //                )
 104                 if( !Term->Text || Term->Flags & VT_FLAG_HIDECSR )
 105                 {
 106                         csr_pos.x = -1;
 107                         csr_pos.y = -1;
 108                 }
 109                 else
 110                 {
 111                         if(Term->Flags & VT_FLAG_ALTBUF)
 112                                 offset = Term->AltWritePos;
 113                         else
 114                                 offset = Term->WritePos - Term->ViewPos;
 115
 116                         csr_pos.x = offset % Term->TextWidth;
 117                         csr_pos.y = offset / Term->TextWidth;
 118                         if( 0 > csr_pos.y || csr_pos.y >= Term->TextHeight )
 119                                 csr_pos.y = -1, csr_pos.x = -1;
 120                 }
 121         }
 122         else
 123         {
 124                 csr_pos.x = Term->VideoCursorX;
 125                 csr_pos.y = Term->VideoCursorY;
 126         }
 127         VFS_IOCtl(giVT_OutputDevHandle, VIDEO_IOCTL_SETCURSOR, &csr_pos);
 128 }
 129
 130 /**
 131  * \fn void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 132  * \brief Updates the video framebuffer
 133  */
 134 void VT_int_UpdateScreen( tVTerm *Term, int UpdateAll )
 135 {
 136         tVT_Char        *buffer;
 137          int    view_pos, write_pos;
 138         // Only update if this is the current terminal
 139         if( Term != gpVT_CurTerm )      return;
 140
 141         switch( Term->Mode )
 142         {
 143         case TERM_MODE_TEXT:
 144                 view_pos = (Term->Flags & VT_FLAG_ALTBUF) ? 0 : Term->ViewPos;
 145                 write_pos = (Term->Flags & VT_FLAG_ALTBUF) ? Term->AltWritePos : Term->WritePos;
 146                 buffer = (Term->Flags & VT_FLAG_ALTBUF) ? Term->AltBuf : Term->Text;
 147                 // Re copy the entire screen?
 148                 if(UpdateAll) {
 149                         VFS_WriteAt(
 150                                 giVT_OutputDevHandle,
 151                                 0,
 152                                 Term->TextWidth*Term->TextHeight*sizeof(tVT_Char),
 153                                 &buffer[view_pos]
 154                                 );
 155                 }
 156                 // Only copy the current line
 157                 else {
 158                          int    ofs = write_pos - write_pos % Term->TextWidth;
 159                         VFS_WriteAt(
 160                                 giVT_OutputDevHandle,
 161                                 (ofs - view_pos)*sizeof(tVT_Char),
 162                                 Term->TextWidth*sizeof(tVT_Char),
 163                                 &buffer[ofs]
 164                                 );
 165                 }
 166                 break;
 167         case TERM_MODE_FB:
 168                 break;
 169         }
 170
 171         VT_int_UpdateCursor(Term, 1);
 172 }
 173