ref: 372afde46e7defc9dd2d719a1732b8ace1fa096e
dir: /win32/rw_imp.c/
/*
Copyright (C) 1997-2001 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
** RW_IMP.C
**
** This file contains ALL Win32 specific stuff having to do with the
** software refresh. When a port is being made the following functions
** must be implemented by the port:
**
** SWimp_EndFrame
** SWimp_Init
** SWimp_SetPalette
** SWimp_Shutdown
*/
#include "..\ref_soft\r_local.h"
#include "rw_win.h"
#include "winquake.h"
// Console variables that we need to access from this module
swwstate_t sww_state;
/*
** VID_CreateWindow
*/
#define WINDOW_CLASS_NAME "Quake 2"
void VID_CreateWindow( int width, int height, int stylebits )
{
WNDCLASS wc;
RECT r;
cvar_t *vid_xpos, *vid_ypos, *vid_fullscreen;
int x, y, w, h;
int exstyle;
vid_xpos = ri.Cvar_Get ("vid_xpos", "0", 0);
vid_ypos = ri.Cvar_Get ("vid_ypos", "0", 0);
vid_fullscreen = ri.Cvar_Get ("vid_fullscreen", "0", CVAR_ARCHIVE );
if ( vid_fullscreen->value )
exstyle = WS_EX_TOPMOST;
else
exstyle = 0;
/* Register the frame class */
wc.style = 0;
wc.lpfnWndProc = (WNDPROC)sww_state.wndproc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = sww_state.hInstance;
wc.hIcon = 0;
wc.hCursor = LoadCursor (NULL,IDC_ARROW);
wc.hbrBackground = (void *)COLOR_GRAYTEXT;
wc.lpszMenuName = 0;
wc.lpszClassName = WINDOW_CLASS_NAME;
if (!RegisterClass (&wc) )
ri.Sys_Error (ERR_FATAL, "Couldn't register window class");
r.left = 0;
r.top = 0;
r.right = width;
r.bottom = height;
AdjustWindowRect (&r, stylebits, FALSE);
w = r.right - r.left;
h = r.bottom - r.top;
x = vid_xpos->value;
y = vid_ypos->value;
sww_state.hWnd = CreateWindowEx (
exstyle,
WINDOW_CLASS_NAME,
"Quake 2",
stylebits,
x, y, w, h,
NULL,
NULL,
sww_state.hInstance,
NULL);
if (!sww_state.hWnd)
ri.Sys_Error (ERR_FATAL, "Couldn't create window");
ShowWindow( sww_state.hWnd, SW_SHOWNORMAL );
UpdateWindow( sww_state.hWnd );
SetForegroundWindow( sww_state.hWnd );
SetFocus( sww_state.hWnd );
// let the sound and input subsystems know about the new window
ri.Vid_NewWindow (width, height);
}
/*
** SWimp_Init
**
** This routine is responsible for initializing the implementation
** specific stuff in a software rendering subsystem.
*/
int SWimp_Init( void *hInstance, void *wndProc )
{
sww_state.hInstance = ( HINSTANCE ) hInstance;
sww_state.wndproc = wndProc;
return true;
}
/*
** SWimp_InitGraphics
**
** This initializes the software refresh's implementation specific
** graphics subsystem. In the case of Windows it creates DIB or
** DDRAW surfaces.
**
** The necessary width and height parameters are grabbed from
** vid.width and vid.height.
*/
static qboolean SWimp_InitGraphics( qboolean fullscreen )
{
// free resources in use
SWimp_Shutdown ();
// create a new window
VID_CreateWindow (vid.width, vid.height, WINDOW_STYLE);
// initialize the appropriate subsystem
if ( !fullscreen )
{
if ( !DIB_Init( &vid.buffer, &vid.rowbytes ) )
{
vid.buffer = 0;
vid.rowbytes = 0;
return false;
}
}
else
{
if ( !DDRAW_Init( &vid.buffer, &vid.rowbytes ) )
{
vid.buffer = 0;
vid.rowbytes = 0;
return false;
}
}
return true;
}
/*
** SWimp_EndFrame
**
** This does an implementation specific copy from the backbuffer to the
** front buffer. In the Win32 case it uses BitBlt or BltFast depending
** on whether we're using DIB sections/GDI or DDRAW.
*/
void SWimp_EndFrame (void)
{
if ( !sw_state.fullscreen )
{
if ( sww_state.palettized )
{
// holdpal = SelectPalette(hdcScreen, hpalDIB, FALSE);
// RealizePalette(hdcScreen);
}
BitBlt( sww_state.hDC,
0, 0,
vid.width,
vid.height,
sww_state.hdcDIBSection,
0, 0,
SRCCOPY );
if ( sww_state.palettized )
{
// SelectPalette(hdcScreen, holdpal, FALSE);
}
}
else
{
RECT r;
HRESULT rval;
DDSURFACEDESC ddsd;
r.left = 0;
r.top = 0;
r.right = vid.width;
r.bottom = vid.height;
sww_state.lpddsOffScreenBuffer->lpVtbl->Unlock( sww_state.lpddsOffScreenBuffer, vid.buffer );
if ( sww_state.modex )
{
if ( ( rval = sww_state.lpddsBackBuffer->lpVtbl->BltFast( sww_state.lpddsBackBuffer,
0, 0,
sww_state.lpddsOffScreenBuffer,
&r,
DDBLTFAST_WAIT ) ) == DDERR_SURFACELOST )
{
sww_state.lpddsBackBuffer->lpVtbl->Restore( sww_state.lpddsBackBuffer );
sww_state.lpddsBackBuffer->lpVtbl->BltFast( sww_state.lpddsBackBuffer,
0, 0,
sww_state.lpddsOffScreenBuffer,
&r,
DDBLTFAST_WAIT );
}
if ( ( rval = sww_state.lpddsFrontBuffer->lpVtbl->Flip( sww_state.lpddsFrontBuffer,
NULL, DDFLIP_WAIT ) ) == DDERR_SURFACELOST )
{
sww_state.lpddsFrontBuffer->lpVtbl->Restore( sww_state.lpddsFrontBuffer );
sww_state.lpddsFrontBuffer->lpVtbl->Flip( sww_state.lpddsFrontBuffer, NULL, DDFLIP_WAIT );
}
}
else
{
if ( ( rval = sww_state.lpddsBackBuffer->lpVtbl->BltFast( sww_state.lpddsFrontBuffer,
0, 0,
sww_state.lpddsOffScreenBuffer,
&r,
DDBLTFAST_WAIT ) ) == DDERR_SURFACELOST )
{
sww_state.lpddsBackBuffer->lpVtbl->Restore( sww_state.lpddsFrontBuffer );
sww_state.lpddsBackBuffer->lpVtbl->BltFast( sww_state.lpddsFrontBuffer,
0, 0,
sww_state.lpddsOffScreenBuffer,
&r,
DDBLTFAST_WAIT );
}
}
memset( &ddsd, 0, sizeof( ddsd ) );
ddsd.dwSize = sizeof( ddsd );
sww_state.lpddsOffScreenBuffer->lpVtbl->Lock( sww_state.lpddsOffScreenBuffer, NULL, &ddsd, DDLOCK_WAIT, NULL );
vid.buffer = ddsd.lpSurface;
vid.rowbytes = ddsd.lPitch;
}
}
/*
** SWimp_SetMode
*/
rserr_t SWimp_SetMode( int *pwidth, int *pheight, int mode, qboolean fullscreen )
{
const char *win_fs[] = { "W", "FS" };
rserr_t retval = rserr_ok;
ri.Con_Printf (PRINT_ALL, "setting mode %d:", mode );
if ( !ri.Vid_GetModeInfo( pwidth, pheight, mode ) )
{
ri.Con_Printf( PRINT_ALL, " invalid mode\n" );
return rserr_invalid_mode;
}
ri.Con_Printf( PRINT_ALL, " %d %d %s\n", *pwidth, *pheight, win_fs[fullscreen] );
sww_state.initializing = true;
if ( fullscreen )
{
if ( !SWimp_InitGraphics( 1 ) )
{
if ( SWimp_InitGraphics( 0 ) )
{
// mode is legal but not as fullscreen
fullscreen = 0;
retval = rserr_invalid_fullscreen;
}
else
{
// failed to set a valid mode in windowed mode
retval = rserr_unknown;
}
}
}
else
{
// failure to set a valid mode in windowed mode
if ( !SWimp_InitGraphics( fullscreen ) )
{
sww_state.initializing = true;
return rserr_unknown;
}
}
sw_state.fullscreen = fullscreen;
#if 0
if ( retval != rserr_unknown )
{
if ( retval == rserr_invalid_fullscreen ||
( retval == rserr_ok && !fullscreen ) )
{
SetWindowLong( sww_state.hWnd, GWL_STYLE, WINDOW_STYLE );
}
}
#endif
R_GammaCorrectAndSetPalette( ( const unsigned char * ) d_8to24table );
sww_state.initializing = true;
return retval;
}
/*
** SWimp_SetPalette
**
** System specific palette setting routine. A NULL palette means
** to use the existing palette. The palette is expected to be in
** a padded 4-byte xRGB format.
*/
void SWimp_SetPalette( const unsigned char *palette )
{
// MGL - what the fuck was kendall doing here?!
// clear screen to black and change palette
// for (i=0 ; i<vid.height ; i++)
// memset (vid.buffer + i*vid.rowbytes, 0, vid.width);
if ( !palette )
palette = ( const unsigned char * ) sw_state.currentpalette;
if ( !sw_state.fullscreen )
{
DIB_SetPalette( ( const unsigned char * ) palette );
}
else
{
DDRAW_SetPalette( ( const unsigned char * ) palette );
}
}
/*
** SWimp_Shutdown
**
** System specific graphics subsystem shutdown routine. Destroys
** DIBs or DDRAW surfaces as appropriate.
*/
void SWimp_Shutdown( void )
{
ri.Con_Printf( PRINT_ALL, "Shutting down SW imp\n" );
DIB_Shutdown();
DDRAW_Shutdown();
if ( sww_state.hWnd )
{
ri.Con_Printf( PRINT_ALL, "...destroying window\n" );
ShowWindow( sww_state.hWnd, SW_SHOWNORMAL ); // prevents leaving empty slots in the taskbar
DestroyWindow (sww_state.hWnd);
sww_state.hWnd = NULL;
UnregisterClass (WINDOW_CLASS_NAME, sww_state.hInstance);
}
}
/*
** SWimp_AppActivate
*/
void SWimp_AppActivate( qboolean active )
{
if ( active )
{
if ( sww_state.hWnd )
{
SetForegroundWindow( sww_state.hWnd );
ShowWindow( sww_state.hWnd, SW_RESTORE );
}
}
else
{
if ( sww_state.hWnd )
{
if ( sww_state.initializing )
return;
if ( vid_fullscreen->value )
ShowWindow( sww_state.hWnd, SW_MINIMIZE );
}
}
}
//===============================================================================
/*
================
Sys_MakeCodeWriteable
================
*/
void Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length)
{
DWORD flOldProtect;
if (!VirtualProtect((LPVOID)startaddr, length, PAGE_READWRITE, &flOldProtect))
ri.Sys_Error(ERR_FATAL, "Protection change failed\n");
}
/*
** Sys_SetFPCW
**
** For reference:
**
** 1
** 5 0
** xxxxRRPP.xxxxxxxx
**
** PP = 00 = 24-bit single precision
** PP = 01 = reserved
** PP = 10 = 53-bit double precision
** PP = 11 = 64-bit extended precision
**
** RR = 00 = round to nearest
** RR = 01 = round down (towards -inf, floor)
** RR = 10 = round up (towards +inf, ceil)
** RR = 11 = round to zero (truncate/towards 0)
**
*/
#if !id386
void Sys_SetFPCW (void)
{
}
#else
unsigned fpu_ceil_cw, fpu_chop_cw, fpu_full_cw, fpu_cw, fpu_pushed_cw;
unsigned fpu_sp24_cw, fpu_sp24_ceil_cw;
void Sys_SetFPCW( void )
{
__asm xor eax, eax
__asm fnstcw word ptr fpu_cw
__asm mov ax, word ptr fpu_cw
__asm and ah, 0f0h
__asm or ah, 003h ; round to nearest mode, extended precision
__asm mov fpu_full_cw, eax
__asm and ah, 0f0h
__asm or ah, 00fh ; RTZ/truncate/chop mode, extended precision
__asm mov fpu_chop_cw, eax
__asm and ah, 0f0h
__asm or ah, 00bh ; ceil mode, extended precision
__asm mov fpu_ceil_cw, eax
__asm and ah, 0f0h ; round to nearest, 24-bit single precision
__asm mov fpu_sp24_cw, eax
__asm and ah, 0f0h ; ceil mode, 24-bit single precision
__asm or ah, 008h ;
__asm mov fpu_sp24_ceil_cw, eax
}
#endif