421 lines
10 KiB
C
421 lines
10 KiB
C
#include <windows.h>
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#define _INC_VFW
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#define VFWAPI FAR PASCAL _loadds
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#include "dva.h"
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#include "lockbm.h"
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/****************************************************************************
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***************************************************************************/
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extern BOOL vga_get_surface(HDC, int, DVASURFACEINFO FAR *);
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extern BOOL ati_get_surface(HDC, int, DVASURFACEINFO FAR *);
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extern BOOL dib_get_surface(HDC, int, DVASURFACEINFO FAR *);
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extern BOOL thun_get_surface(HDC,int, DVASURFACEINFO FAR *);
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extern BOOL vlb_get_surface(HDC, int, DVASURFACEINFO FAR *);
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#define GetDS() SELECTOROF((LPVOID)&ScreenSel)
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static short ScreenSel;
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static BOOL InitSurface(DVASURFACEINFO FAR *pdva);
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static BOOL TestSurface(DVASURFACEINFO FAR *pdva);
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static void SetSelLimit(UINT sel, DWORD limit);
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/****************************************************************************
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***************************************************************************/
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void FAR PASCAL DVAInit()
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{
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}
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/****************************************************************************
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***************************************************************************/
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void FAR PASCAL DVATerm()
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{
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//
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// free screen alias
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//
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if (ScreenSel)
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{
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SetSelLimit(ScreenSel, 0);
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FreeSelector(ScreenSel);
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ScreenSel = 0;
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}
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}
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/****************************************************************************
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***************************************************************************/
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BOOL FAR PASCAL _loadds DVAGetSurface(HDC hdc, int nSurface, DVASURFACEINFO FAR *pdva)
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{
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int i;
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#ifdef USESTUPIDESCAPE
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i = Escape(hdc, DVAGETSURFACE,sizeof(int),(LPCSTR)&nSurface,(LPVOID)pdva);
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#else
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i = 0;
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#endif
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//
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// should this be a function table? list?
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//
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if (i <= 0 &&
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#ifdef BADDIBENGINESTUFF
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!dib_get_surface(hdc, nSurface, pdva) &&
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#endif
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!ati_get_surface(hdc, nSurface, pdva) &&
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#ifdef DEBUG
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!vlb_get_surface(hdc, nSurface, pdva) &&
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!thun_get_surface(hdc, nSurface, pdva) &&
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#endif
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!vga_get_surface(hdc, nSurface, pdva))
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return FALSE;
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return InitSurface(pdva);
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}
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#if 0
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/****************************************************************************
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***************************************************************************/
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HDVA FAR PASCAL DVAOpenSurface(HDC hdc, int nSurface)
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{
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PDVA pdva;
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pdva = (PDVA)GlobalAllocPtr(GHND|GMEM_SHARE, sizeof(DVASURFACEINFO));
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if (pdva == NULL)
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return NULL;
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if (!DVAGetSurface(hdc, nSurface, pdva) ||
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!pdva->OpenSurface(pdva->lpSurface))
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{
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GlobalFreePtr(pdva);
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return NULL;
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}
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return pdva;
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}
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/****************************************************************************
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***************************************************************************/
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void FAR PASCAL DVACloseSurface(HDVA pdva)
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{
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if (pdva == NULL)
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return;
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pdva->CloseSurface(pdva->lpSurface);
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GlobalFreePtr(pdva);
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}
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#endif
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/****************************************************************************
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***************************************************************************/
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BOOL CALLBACK default_open_surface(LPVOID pv)
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{
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return TRUE;
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}
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/****************************************************************************
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***************************************************************************/
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void CALLBACK default_close_surface(LPVOID pv)
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{
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}
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/****************************************************************************
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***************************************************************************/
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BOOL CALLBACK default_begin_access(LPVOID pv, int x, int y, int dx, int dy)
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{
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return TRUE;
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}
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/****************************************************************************
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***************************************************************************/
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void CALLBACK default_end_access(LPVOID pv)
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{
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}
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/****************************************************************************
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***************************************************************************/
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UINT CALLBACK default_show_surface(LPVOID pv, HWND hwnd, LPRECT src, LPRECT dst)
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{
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return 1;
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}
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/****************************************************************************
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***************************************************************************/
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static BOOL InitSurface(DVASURFACEINFO FAR *pdva)
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{
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LPBITMAPINFOHEADER lpbi;
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if (pdva->Version != 0x0100)
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return FALSE;
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lpbi = &pdva->BitmapInfo;
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if (lpbi->biSize != sizeof(BITMAPINFOHEADER))
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return FALSE;
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if (lpbi->biPlanes != 1)
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return FALSE;
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//
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// make the pointer a 16:16 pointer
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//
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if (pdva->offSurface >= 0x10000 &&
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!(pdva->Flags & DVAF_1632_ACCESS))
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{
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if (ScreenSel == NULL)
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ScreenSel = AllocSelector(GetDS());
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if (pdva->selSurface != 0)
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pdva->offSurface += GetSelectorBase(pdva->selSurface);
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SetSelectorBase(ScreenSel,pdva->offSurface);
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SetSelLimit(ScreenSel,lpbi->biSizeImage-1);
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pdva->offSurface = 0;
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pdva->selSurface = ScreenSel;
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}
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//
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// fill in defaults.
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//
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if (pdva->OpenSurface == NULL)
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pdva->OpenSurface = default_open_surface;
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if (pdva->CloseSurface == NULL)
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pdva->CloseSurface = default_close_surface;
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if (pdva->ShowSurface == NULL)
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pdva->ShowSurface = default_show_surface;
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if (pdva->BeginAccess == NULL)
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{
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pdva->BeginAccess = default_begin_access;
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pdva->EndAccess = default_end_access;
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}
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//
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// only test RGB surfaces.
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//
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if (lpbi->biCompression == 0 ||
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lpbi->biCompression == BI_BITFIELDS ||
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lpbi->biCompression == BI_1632)
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{
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if (!TestSurface(pdva))
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return FALSE;
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}
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//
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// set BI_1632 if needed
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//
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if (pdva->Flags & DVAF_1632_ACCESS)
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{
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lpbi->biCompression = BI_1632;
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}
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return TRUE;
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}
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/****************************************************************************
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***************************************************************************/
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#pragma optimize("", off)
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static void SetSelLimit(UINT sel, DWORD limit)
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{
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if (limit >= 1024*1024l)
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limit = ((limit+4096) & ~4095) - 1;
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_asm
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{
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mov ax,0008h ; DPMI set limit
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mov bx,sel
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mov dx,word ptr limit[0]
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mov cx,word ptr limit[2]
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int 31h
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}
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}
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#pragma optimize("", on)
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/****************************************************************************
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***************************************************************************/
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#define ASM66 _asm _emit 0x66 _asm
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#define DB _asm _emit
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#pragma optimize("", off)
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static BYTE ReadByte(PDVA pdva, LPVOID lpBits, DWORD dw)
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{
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BYTE b=42;
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DVABeginAccess(pdva, 0, 0, 1024, 1024);
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_asm {
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ASM66 xor bx,bx
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les bx,lpBits
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ASM66 add bx,word ptr dw
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mov ax,es
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ASM66 lsl ax,ax
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ASM66 cmp bx,ax
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ja exit
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DB 26h ;mov al,es:[ebx]
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DB 67h
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DB 8Ah
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DB 03h
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mov b,al
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exit:
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}
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DVAEndAccess(pdva);
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return b;
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}
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#pragma optimize("", on)
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/////////////////////////////////////////////////////////////////////////////
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//
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// SetPixel
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//
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// some cards cant't seam to do SetPixel right it is amazing they work at all
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//
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/////////////////////////////////////////////////////////////////////////////
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static void SetPixelX(HDC hdc, int x, int y, COLORREF rgb)
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{
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RECT rc;
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rc.left = x;
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rc.top = y;
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rc.right = x+1;
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rc.bottom = y+1;
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SetBkColor(hdc, rgb);
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ExtTextOut(hdc, 0, 0, ETO_OPAQUE, &rc, NULL, 0, NULL);
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}
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#define SetPixel SetPixelX
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/****************************************************************************
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***************************************************************************/
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static BOOL TestSurface(DVASURFACEINFO FAR *pdva)
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{
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HDC hdc;
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int x,y,h,w,wb;
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COLORREF rgb,rgb0,rgb1,rgb2,rgb3,rgb4;
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DWORD dw;
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BYTE b0,b1;
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UINT uType=0;
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LPBITMAPINFOHEADER lpbi;
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LPVOID lpBits;
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HCURSOR hcur;
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if (!pdva->OpenSurface(pdva->lpSurface))
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return FALSE;
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lpbi = DVAGetSurfaceFmt(pdva);
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lpBits = DVAGetSurfacePtr(pdva);
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h = abs((int)lpbi->biHeight);
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w = (int)lpbi->biWidth;
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wb = (w * ((UINT)lpbi->biBitCount/8) + 3) & ~3;
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dw = (DWORD)(UINT)(h-1) * (DWORD)(UINT)wb;
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if ((int)lpbi->biHeight < 0)
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y = 0;
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else
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y = h-1;
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#ifdef XDEBUG
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x = (int)lpbi->biWidth - 5;
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((LPBYTE)lpBits) += x * (UINT)lpbi->biBitCount/8;
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#else
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x = 0;
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#endif
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hcur = SetCursor(NULL);
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hdc = GetDC(NULL);
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rgb = GetPixel(hdc, x, h-1-y);
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SetPixel(hdc, x, h-1-y, RGB(0,0,0)); GetPixel(hdc, x, h-1-y); b0 = ReadByte(pdva, lpBits, dw);
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SetPixel(hdc, x, h-1-y, RGB(255,255,255)); GetPixel(hdc, x, h-1-y); b1 = ReadByte(pdva, lpBits, dw);
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SetPixel(hdc, x, h-1-y,rgb);
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if (b0 != 0x00 || b1 == 0x00)
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goto done;
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rgb0 = GetPixel(hdc, x+0, y);
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rgb1 = GetPixel(hdc, x+1, y);
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rgb2 = GetPixel(hdc, x+2, y);
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rgb3 = GetPixel(hdc, x+3, y);
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rgb4 = GetPixel(hdc, x+4, y);
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TestSurfaceType(hdc, x, y);
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DVABeginAccess(pdva, x, y, 5, 1);
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uType = GetSurfaceType(lpBits);
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DVAEndAccess(pdva);
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SetPixel(hdc, x+0, y,rgb0);
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SetPixel(hdc, x+1, y,rgb1);
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SetPixel(hdc, x+2, y,rgb2);
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SetPixel(hdc, x+3, y,rgb3);
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SetPixel(hdc, x+4, y,rgb4);
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done:
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ReleaseDC(NULL, hdc);
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SetCursor(hcur);
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pdva->CloseSurface(pdva->lpSurface);
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switch (uType)
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{
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case BM_8BIT:
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break;
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case BM_16555:
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((LPDWORD)(lpbi+1))[0] = 0x007C00;
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((LPDWORD)(lpbi+1))[1] = 0x0003E0;
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((LPDWORD)(lpbi+1))[2] = 0x00001F;
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break;
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case BM_24BGR:
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case BM_32BGR:
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((LPDWORD)(lpbi+1))[0] = 0xFF0000;
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((LPDWORD)(lpbi+1))[1] = 0x00FF00;
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((LPDWORD)(lpbi+1))[2] = 0x0000FF;
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break;
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case BM_16565:
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lpbi->biCompression = BI_BITFIELDS;
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((LPDWORD)(lpbi+1))[0] = 0x00F800;
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((LPDWORD)(lpbi+1))[1] = 0x0007E0;
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((LPDWORD)(lpbi+1))[2] = 0x00001F;
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break;
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case BM_24RGB:
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case BM_32RGB:
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lpbi->biCompression = BI_BITFIELDS;
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((LPDWORD)(lpbi+1))[0] = 0x0000FF;
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((LPDWORD)(lpbi+1))[1] = 0x00FF00;
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((LPDWORD)(lpbi+1))[2] = 0xFF0000;
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break;
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}
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return uType != 0;
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}
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