text: /****************************************************************************
  *
  *                   VBE 2.0 Linear Framebuffer Profiler
  *                    By Kendall Bennett and Brian Hook
  *
  * Filename:     LFBPROF.H
  * Language:     ANSI C
  * Environment:  Watcom C/C++ 10.0a with DOS4GW
  *
  * Description:  Header file for the LFBPROF.C progam.
  *
  ****************************************************************************/
  
  #ifndef __LFBPROF_H
  #define __LFBPROF_H
  
  /*---------------------- Macros and type definitions ----------------------*/
  
  #pragma pack(1)
  
  /* SuperVGA information block */
  
  typedef struct {
      char    VESASignature[4];       /* 'VESA' 4 byte signature          */
      short   VESAVersion;            /* VBE version number               */
      long    OemStringPtr;           /* Pointer to OEM string            */
      long    Capabilities;           /* Capabilities of video card       */
      long    VideoModePtr;           /* Pointer to supported modes       */
      short   TotalMemory;            /* Number of 64kb memory blocks     */
  
      /* VBE 2.0 extensions */
  
      short   OemSoftwareRev;         /* OEM Software revision number     */
      long    OemVendorNamePtr;       /* Pointer to Vendor Name string    */
      long    OemProductNamePtr;      /* Pointer to Product Name string   */
      long    OemProductRevPtr;       /* Pointer to Product Revision str  */
      char    reserved[222];          /* Pad to 256 byte block size       */
      char    OemDATA[256];           /* Scratch pad for OEM data         */
      } VBE_vgaInfo;
  
  /* SuperVGA mode information block */
  
  typedef struct {
      short   ModeAttributes;         /* Mode attributes                  */
      char    WinAAttributes;         /* Window A attributes              */
      char    WinBAttributes;         /* Window B attributes              */
      short   WinGranularity;         /* Window granularity in k          */
      short   WinSize;                /* Window size in k                 */
      short   WinASegment;            /* Window A segment                 */
      short   WinBSegment;            /* Window B segment                 */
      long    WinFuncPtr;             /* Pointer to window function       */
      short   BytesPerScanLine;       /* Bytes per scanline               */
      short   XResolution;            /* Horizontal resolution            */
      short   YResolution;            /* Vertical resolution              */
      char    XCharSize;              /* Character cell width             */
      char    YCharSize;              /* Character cell height            */
      char    NumberOfPlanes;         /* Number of memory planes          */
      char    BitsPerPixel;           /* Bits per pixel                   */
      char    NumberOfBanks;          /* Number of CGA style banks        */
      char    MemoryModel;            /* Memory model type                */
      char    BankSize;               /* Size of CGA style banks          */
      char    NumberOfImagePages;     /* Number of images pages           */
      char    res1;                   /* Reserved                         */
      char    RedMaskSize;            /* Size of direct color red mask    */
      char    RedFieldPosition;       /* Bit posn of lsb of red mask      */
      char    GreenMaskSize;          /* Size of direct color green mask  */
      char    GreenFieldPosition;     /* Bit posn of lsb of green mask    */
      char    BlueMaskSize;           /* Size of direct color blue mask   */
      char    BlueFieldPosition;      /* Bit posn of lsb of blue mask     */
      char    RsvdMaskSize;           /* Size of direct color res mask    */
      char    RsvdFieldPosition;      /* Bit posn of lsb of res mask      */
      char    DirectColorModeInfo;    /* Direct color mode attributes     */
  
      /* VBE 2.0 extensions */
  
      long    PhysBasePtr;            /* Physical address for linear buf  */
      long    OffScreenMemOffset;     /* Pointer to start of offscreen mem*/
      short   OffScreenMemSize;       /* Amount of offscreen mem in 1K's  */
      char    res2[206];              /* Pad to 256 byte block size       */
      } VBE_modeInfo;
  
  #define vbeMemPK        4           /* Packed Pixel memory model        */
  #define vbeUseLFB       0x4000      /* Enable linear framebuffer mode   */
  
  /* Flags for the mode attributes returned by VBE_getModeInfo. If
   * vbeMdNonBanked is set to 1 and vbeMdLinear is also set to 1, then only
   * the linear framebuffer mode is available.
   */
  
  #define vbeMdAvailable  0x0001      /* Video mode is available          */
  #define vbeMdColorMode  0x0008      /* Mode is a color video mode       */
  #define vbeMdGraphMode  0x0010      /* Mode is a graphics mode          */
  #define vbeMdNonBanked  0x0040      /* Banked mode is not supported     */
  #define vbeMdLinear     0x0080      /* Linear mode supported            */
  
  /* Structures for issuing real mode interrupts with DPMI */
  
  struct _RMWORDREGS {
      unsigned short ax, bx, cx, dx, si, di, cflag;
      };
  
  struct _RMBYTEREGS {
      unsigned char   al, ah, bl, bh, cl, ch, dl, dh;
      };
  
  typedef union {
      struct  _RMWORDREGS x;
      struct  _RMBYTEREGS h;
      } RMREGS;
  
  typedef struct {
      unsigned short  es;
      unsigned short  cs;
      unsigned short  ss;
      unsigned short  ds;
      } RMSREGS;
  
  /* Inline assembler block fill/move routines */
  
  void LfbMemset(void *p,int c,int n);
  #pragma aux LfbMemset =             \
  	"shr    ecx,2"                  \
  	"xor    eax,eax"                \
  	"mov    al,bl"                  \
  	"shl    ebx,8"                  \
  	"or     ax,bx"                  \
  	"mov    ebx,eax"                \
  	"shl    ebx,16"                 \
  	"or     eax,ebx"                \
  	"rep    stosd"                  \
  	parm [edi] [ebx] [ecx];
  
  void LfbMemcpy(void *dst,void *src,int n);
  #pragma aux LfbMemcpy =             \
  	"shr    ecx,2"                  \
  	"rep    movsd"                  \
  	parm [edi] [esi] [ecx];
  
  /* Map a real mode pointer into address space */
  
  #define LfbMapRealPointer(p)    (void*)(((unsigned)((p)  & 0xFFFF0000) >> 12) + ((p) & 0xFFFF))
  
  /* Get the current timer tick count */
  
  #define LfbGetTicks()       *((long*)0x46C)
  
  #pragma pack()
  
  #endif  /* __LFBPROF_H */
  