AcessNative/acesskernel_src/video.c

   1 /*
   2  * Acess2 Native Kernel
   3  *
   4  * Video Driver
   5  */
   6 #define VERSION ((0<<8)|10)
   7 #define DEBUG   0
   8 #include <acess.h>
   9 #include <vfs.h>
  10 #include <fs_devfs.h>
  11 #include <modules.h>
  12 #include <api_drv_video.h>
  13 #include "ui.h"
  14
  15 // === PROTOTYPES ===
  16  int    Video_Install(char **Arguments);
  17 size_t  Video_Read(tVFS_Node *Node, Uint64 Offset, size_t Length, void *Buffer, Uint Flags);
  18 size_t  Video_Write(tVFS_Node *Node, Uint64 Offset, size_t Length, const void *Buffer, Uint Flags);
  19  int    Video_IOCtl(tVFS_Node *Node, int ID, void *Data);
  20 // --- 2D Acceleration Functions --
  21 void    Video_2D_Fill(void *Ent, Uint16 X, Uint16 Y, Uint16 W, Uint16 H, Uint32 Colour);
  22 void    Video_2D_Blit(void *Ent, Uint16 DstX, Uint16 DstY, Uint16 SrcX, Uint16 SrcY, Uint16 W, Uint16 H);
  23
  24 // === GLOBALS ===
  25 //MODULE_DEFINE(0, VERSION, NativeVideo, Video_Install, NULL, NULL);
  26 tVFS_NodeType   gVideo_NodeType = {
  27         .Read = Video_Read,
  28         .Write = Video_Write,
  29         .IOCtl = Video_IOCtl
  30 };
  31 tDevFS_Driver   gVideo_DriverStruct = {
  32         NULL, "NativeVideo",
  33         {.Type = &gVideo_NodeType}
  34 };
  35  int    giVideo_DriverID;
  36  int    giVideo_CurrentFormat;
  37 // --- 2D Video Stream Handlers ---
  38 tDrvUtil_Video_2DHandlers       gVideo_2DFunctions = {
  39         NULL,
  40         Video_2D_Fill,
  41         Video_2D_Blit
  42 };
  43
  44 // === CODE ===
  45 int Video_Install(char **Arguments)
  46 {
  47         // Install Device
  48         giVideo_DriverID = DevFS_AddDevice( &gVideo_DriverStruct );
  49         if(giVideo_DriverID == -1)
  50                 return MODULE_ERR_MISC;
  51
  52         return MODULE_ERR_OK;
  53 }
  54
  55 /**
  56  * \brief Read from framebuffer (unimplemented)
  57  */
  58 size_t Video_Read(tVFS_Node *Node, Uint64 Offset, size_t Length, void *Buffer, Uint Flags)
  59 {
  60         return 0;
  61 }
  62
  63 /**
  64  * \brief Write to the framebuffer
  65  */
  66 size_t Video_Write(tVFS_Node *Node, Uint64 Offset, size_t Length, const void *Buffer, Uint Flags)
  67 {
  68          int    i;
  69         ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
  70
  71         if(Buffer == NULL) {
  72                 LEAVE('i', 0);
  73                 return 0;
  74         }
  75         // Text Mode
  76         switch( giVideo_CurrentFormat )
  77         {
  78         case VIDEO_BUFFMT_TEXT:
  79                 {
  80                 const tVT_Char  *chars = Buffer;
  81                 // int  pitch = giUI_Pitch;
  82                  int    widthInChars = giUI_Width/giVT_CharWidth;
  83                  int    heightInChars = giUI_Height/giVT_CharHeight;
  84                  int    x, y;
  85                 Uint32  tmpBuf[giVT_CharHeight*giVT_CharWidth];
  86
  87                 Length /= sizeof(tVT_Char);
  88                 Offset /= sizeof(tVT_Char);
  89
  90                 x = Offset % widthInChars;
  91                 y = Offset / widthInChars;
  92
  93                 // Sanity Check
  94                 if( Offset > (Uint64)(heightInChars*widthInChars) ) {
  95                         Log_Notice("Video", "Offset (%i) > %i*%i (%i)", Offset,
  96                                 heightInChars, widthInChars, heightInChars*widthInChars);
  97                         LEAVE('i', 0);
  98                         return 0;
  99                 }
 100                 if(y >= heightInChars) {
 101                         LEAVE('i', 0);
 102                         return 0;
 103                 }
 104
 105                 // Clip to screen size
 106                 if( (int)Offset + (int)Length > heightInChars*widthInChars ) {
 107                         Log_Debug("Video", "%i + %i > %i*%i (%i)",
 108                                 (int)Offset, (int)Length, heightInChars, widthInChars, heightInChars*widthInChars);
 109                         Length = heightInChars*widthInChars - Offset;
 110                         Log_Notice("Video", "Clipping write size to %i characters", (int)Length);
 111                 }
 112
 113 //              Log_Debug("Video", "(%i,%i) %i chars", x, y, (int)Length);
 114
 115                 // Print characters
 116                 for( i = 0; i < (int)Length; i++ )
 117                 {
 118                         if( chars->Ch )
 119                         {
 120 //                              Log_Debug("Video", "Render Char 0x%x in 0x%03x:%03x",
 121 //                                      chars->Ch, chars->FGCol, chars->BGCol);
 122                                 memset(tmpBuf, 0xFF, giVT_CharWidth*giVT_CharHeight*4);
 123                                 VT_Font_Render(
 124                                         chars->Ch,
 125                                         tmpBuf, 32, giVT_CharWidth*4,
 126                                         VT_Colour12to24(chars->BGCol),
 127                                         VT_Colour12to24(chars->FGCol)
 128                                         );
 129                                 UI_BlitBitmap(
 130                                         x*giVT_CharWidth, y*giVT_CharHeight,
 131                                         giVT_CharWidth, giVT_CharHeight,
 132                                         tmpBuf
 133                                         );
 134                         }
 135                         else
 136                         {
 137                                 UI_FillBitmap(
 138                                         x*giVT_CharWidth, y*giVT_CharHeight,
 139                                         giVT_CharWidth, giVT_CharHeight,
 140                                         VT_Colour12to24(chars->BGCol)
 141                                         );
 142                         }
 143
 144                         chars ++;
 145                         x ++;
 146                         if( x >= widthInChars ) {
 147                                 x = 0;
 148                                 y ++;
 149                                 //dest += pitch*giVT_CharHeight;
 150                         }
 151                 }
 152                 Length *= sizeof(tVT_Char);
 153                 }
 154                 break;
 155
 156         case VIDEO_BUFFMT_FRAMEBUFFER:
 157                 {
 158                  int    startX, startY;
 159
 160                 if(giUI_Pitch*giUI_Height < Offset+Length)
 161                 {
 162                         Log_Warning("Video", "Video_Write - Framebuffer Overflow");
 163                         LEAVE('i', 0);
 164                         return 0;
 165                 }
 166
 167                 LOG("buffer = %p", Buffer);
 168
 169                 Offset /= 4;
 170                 startX = Offset % giUI_Width;
 171                 startY = Offset / giUI_Width;
 172                 Length /= 4;
 173
 174                 if( startX + Length < giUI_Width )
 175                 {
 176                         // Single line
 177                         UI_BlitBitmap(
 178                                 startX, startY,
 179                                 Length, 1,
 180                                 Buffer);
 181                 }
 182                 else if( startX == 0 )
 183                 {
 184                         int     lines = Length / giUI_Width;
 185                         int     rem = Length % giUI_Width;
 186                         UI_BlitBitmap(0, startY, giUI_Width, lines, Buffer);
 187                         if( rem ) {
 188                                 UI_BlitBitmap(0, startY + lines, rem, 1, (Uint32*)Buffer + lines*giUI_Width);
 189                         }
 190                 }
 191                 else
 192                 {
 193                         // First scanline (partial or full)
 194                         UI_BlitBitmap(
 195                                 startX, startY,
 196                                 giUI_Width - startX, 1,
 197                                 Buffer);
 198
 199                         Length -= giUI_Width - startX;
 200                         Buffer += giUI_Width - startX;
 201
 202                         // Middle Scanlines
 203                         for( i = 0; i < Length / giUI_Height; i ++ )
 204                         {
 205                                 UI_BlitBitmap(
 206                                         0, startY + i,
 207                                         giUI_Width, 1,
 208                                         Buffer);
 209                                 Buffer += giUI_Width;
 210                         }
 211
 212                         // Final scanline (partial)
 213                         if( Length % giUI_Height )
 214                         {
 215                                 UI_BlitBitmap(
 216                                         0, startY + i,
 217                                         Length % giUI_Height, 1,
 218                                         Buffer);
 219                         }
 220                 }
 221                 }
 222                 break;
 223
 224         case VIDEO_BUFFMT_2DSTREAM:
 225                 Length = DrvUtil_Video_2DStream(
 226                         NULL,   // Single framebuffer, so Ent is unused
 227                         Buffer, Length, &gVideo_2DFunctions, sizeof(gVideo_2DFunctions)
 228                         );
 229                 break;
 230
 231         default:
 232                 LEAVE('i', -1);
 233                 return -1;
 234         }
 235
 236         // Tell the UI to blit
 237         UI_Redraw();
 238
 239         LEAVE('X', Length);
 240         return Length;
 241 }
 242
 243 const char * csaVIDEO_IOCTLS[] = {DRV_IOCTLNAMES, DRV_VIDEO_IOCTLNAMES, NULL};
 244 /**
 245  * \brief Handle messages to the device
 246  */
 247 int Video_IOCtl(tVFS_Node *Node, int ID, void *Data)
 248 {
 249          int    ret;
 250         tVideo_IOCtl_Mode       *mode = Data;
 251         switch(ID)
 252         {
 253         BASE_IOCTLS(DRV_TYPE_VIDEO, "NativeVideo", VERSION, csaVIDEO_IOCTLS);
 254
 255         // Video mode control
 256         // - We cheat, and only have one mode
 257         case VIDEO_IOCTL_GETSETMODE:
 258                 return 0;
 259         case VIDEO_IOCTL_FINDMODE:
 260         case VIDEO_IOCTL_MODEINFO:
 261                 mode->id = 0;
 262                 mode->width = giUI_Width;
 263                 mode->height = giUI_Height;
 264                 mode->bpp = 32;
 265                 mode->flags = 0;
 266                 return 0;
 267
 268         // Buffer mode
 269         case VIDEO_IOCTL_SETBUFFORMAT:
 270                 ret = giVideo_CurrentFormat;
 271                 if(Data) {
 272                         giVideo_CurrentFormat = *(int*)Data;
 273                 }
 274                 return ret;
 275
 276         #if 0
 277         case VIDEO_IOCTL_SETCURSOR:     // Set cursor position
 278                 #if !BLINKING_CURSOR
 279                 if(giVideo_CursorX > 0)
 280                         Video_FlipCursor(Node);
 281                 #endif
 282                 giVideo_CursorX = ((tVideo_IOCtl_Pos*)Data)->x;
 283                 giVideo_CursorY = ((tVideo_IOCtl_Pos*)Data)->y;
 284                 if(     giVideo_CursorX < 0 || giVesaCursorY < 0
 285                 ||      giVideo_CursorX >= gpVesaCurMode->width/giVT_CharWidth
 286                 ||      giVideo_CursorY >= gpVesaCurMode->height/giVT_CharHeight)
 287                 {
 288                         #if BLINKING_CURSOR
 289                         if(giVesaCursorTimer != -1) {
 290                                 Time_RemoveTimer(giVesaCursorTimer);
 291                                 giVesaCursorTimer = -1;
 292                         }
 293                         #endif
 294                         giVesaCursorX = -1;
 295                         giVesaCursorY = -1;
 296                 }
 297                 else {
 298                         #if BLINKING_CURSOR
 299                 //      Log_Debug("VESA", "Updating timer %i?", giVesaCursorTimer);
 300                         if(giVesaCursorTimer == -1)
 301                                 giVesaCursorTimer = Time_CreateTimer(VESA_CURSOR_PERIOD, Vesa_FlipCursor, Node);
 302                         #else
 303                         Vesa_FlipCursor(Node);
 304                         #endif
 305                 }
 306                 //Log_Debug("VESA", "Cursor position (%i,%i) Timer %i", giVesaCursorX, giVesaCursorY, giVesaCursorTimer);
 307                 return 0;
 308         #endif
 309         }
 310         return 0;
 311 }
 312
 313 // --- 2D Acceleration Functions --
 314 void Video_2D_Fill(void *Ent, Uint16 X, Uint16 Y, Uint16 W, Uint16 H, Uint32 Colour)
 315 {
 316         UI_FillBitmap(X, Y, W, H, Colour);
 317 }
 318
 319 void Video_2D_Blit(void *Ent, Uint16 DstX, Uint16 DstY, Uint16 SrcX, Uint16 SrcY, Uint16 W, Uint16 H)
 320 {
 321         UI_BlitFramebuffer(DstX, DstY, SrcX, SrcY, W, H);
 322 }