ref: c05151aa1b7ac81866cf937c973e7038035dfe53
dir: /win32/rw_dib.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_DIB.C
**
** This handles DIB section management under Windows.
**
*/
#include "..\ref_soft\r_local.h"
#include "rw_win.h"
#ifndef _WIN32
# error You should not be trying to compile this file on this platform
#endif
static qboolean s_systemcolors_saved;
static HGDIOBJ previously_selected_GDI_obj;
static int s_syspalindices[] =
{
COLOR_ACTIVEBORDER,
COLOR_ACTIVECAPTION,
COLOR_APPWORKSPACE,
COLOR_BACKGROUND,
COLOR_BTNFACE,
COLOR_BTNSHADOW,
COLOR_BTNTEXT,
COLOR_CAPTIONTEXT,
COLOR_GRAYTEXT,
COLOR_HIGHLIGHT,
COLOR_HIGHLIGHTTEXT,
COLOR_INACTIVEBORDER,
COLOR_INACTIVECAPTION,
COLOR_MENU,
COLOR_MENUTEXT,
COLOR_SCROLLBAR,
COLOR_WINDOW,
COLOR_WINDOWFRAME,
COLOR_WINDOWTEXT
};
#define NUM_SYS_COLORS ( sizeof( s_syspalindices ) / sizeof( int ) )
static int s_oldsyscolors[NUM_SYS_COLORS];
typedef struct dibinfo
{
BITMAPINFOHEADER header;
RGBQUAD acolors[256];
} dibinfo_t;
typedef struct
{
WORD palVersion;
WORD palNumEntries;
PALETTEENTRY palEntries[256];
} identitypalette_t;
static identitypalette_t s_ipal;
static void DIB_SaveSystemColors( void );
static void DIB_RestoreSystemColors( void );
/*
** DIB_Init
**
** Builds our DIB section
*/
qboolean DIB_Init( unsigned char **ppbuffer, int *ppitch )
{
dibinfo_t dibheader;
BITMAPINFO *pbmiDIB = ( BITMAPINFO * ) &dibheader;
int i;
memset( &dibheader, 0, sizeof( dibheader ) );
/*
** grab a DC
*/
if ( !sww_state.hDC )
{
if ( ( sww_state.hDC = GetDC( sww_state.hWnd ) ) == NULL )
return false;
}
/*
** figure out if we're running in an 8-bit display mode
*/
if ( GetDeviceCaps( sww_state.hDC, RASTERCAPS ) & RC_PALETTE )
{
sww_state.palettized = true;
// save system colors
if ( !s_systemcolors_saved )
{
DIB_SaveSystemColors();
s_systemcolors_saved = true;
}
}
else
{
sww_state.palettized = false;
}
/*
** fill in the BITMAPINFO struct
*/
pbmiDIB->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
pbmiDIB->bmiHeader.biWidth = vid.width;
pbmiDIB->bmiHeader.biHeight = vid.height;
pbmiDIB->bmiHeader.biPlanes = 1;
pbmiDIB->bmiHeader.biBitCount = 8;
pbmiDIB->bmiHeader.biCompression = BI_RGB;
pbmiDIB->bmiHeader.biSizeImage = 0;
pbmiDIB->bmiHeader.biXPelsPerMeter = 0;
pbmiDIB->bmiHeader.biYPelsPerMeter = 0;
pbmiDIB->bmiHeader.biClrUsed = 256;
pbmiDIB->bmiHeader.biClrImportant = 256;
/*
** fill in the palette
*/
for ( i = 0; i < 256; i++ )
{
dibheader.acolors[i].rgbRed = ( d_8to24table[i] >> 0 ) & 0xff;
dibheader.acolors[i].rgbGreen = ( d_8to24table[i] >> 8 ) & 0xff;
dibheader.acolors[i].rgbBlue = ( d_8to24table[i] >> 16 ) & 0xff;
}
/*
** create the DIB section
*/
sww_state.hDIBSection = CreateDIBSection( sww_state.hDC,
pbmiDIB,
DIB_RGB_COLORS,
&sww_state.pDIBBase,
NULL,
0 );
if ( sww_state.hDIBSection == NULL )
{
ri.Con_Printf( PRINT_ALL, "DIB_Init() - CreateDIBSection failed\n" );
goto fail;
}
if ( pbmiDIB->bmiHeader.biHeight > 0 )
{
// bottom up
*ppbuffer = sww_state.pDIBBase + ( vid.height - 1 ) * vid.width;
*ppitch = -vid.width;
}
else
{
// top down
*ppbuffer = sww_state.pDIBBase;
*ppitch = vid.width;
}
/*
** clear the DIB memory buffer
*/
memset( sww_state.pDIBBase, 0xff, vid.width * vid.height );
if ( ( sww_state.hdcDIBSection = CreateCompatibleDC( sww_state.hDC ) ) == NULL )
{
ri.Con_Printf( PRINT_ALL, "DIB_Init() - CreateCompatibleDC failed\n" );
goto fail;
}
if ( ( previously_selected_GDI_obj = SelectObject( sww_state.hdcDIBSection, sww_state.hDIBSection ) ) == NULL )
{
ri.Con_Printf( PRINT_ALL, "DIB_Init() - SelectObject failed\n" );
goto fail;
}
return true;
fail:
DIB_Shutdown();
return false;
}
/*
** DIB_SetPalette
**
** Sets the color table in our DIB section, and also sets the system palette
** into an identity mode if we're running in an 8-bit palettized display mode.
**
** The palette is expected to be 1024 bytes, in the format:
**
** R = offset 0
** G = offset 1
** B = offset 2
** A = offset 3
*/
void DIB_SetPalette( const unsigned char *_pal )
{
const unsigned char *pal = _pal;
LOGPALETTE *pLogPal = ( LOGPALETTE * ) &s_ipal;
RGBQUAD colors[256];
int i;
int ret;
HDC hDC = sww_state.hDC;
/*
** set the DIB color table
*/
if ( sww_state.hdcDIBSection )
{
for ( i = 0; i < 256; i++, pal += 4 )
{
colors[i].rgbRed = pal[0];
colors[i].rgbGreen = pal[1];
colors[i].rgbBlue = pal[2];
colors[i].rgbReserved = 0;
}
colors[0].rgbRed = 0;
colors[0].rgbGreen = 0;
colors[0].rgbBlue = 0;
colors[255].rgbRed = 0xff;
colors[255].rgbGreen = 0xff;
colors[255].rgbBlue = 0xff;
if ( SetDIBColorTable( sww_state.hdcDIBSection, 0, 256, colors ) == 0 )
{
ri.Con_Printf( PRINT_ALL, "DIB_SetPalette() - SetDIBColorTable failed\n" );
}
}
/*
** for 8-bit color desktop modes we set up the palette for maximum
** speed by going into an identity palette mode.
*/
if ( sww_state.palettized )
{
int i;
HPALETTE hpalOld;
if ( SetSystemPaletteUse( hDC, SYSPAL_NOSTATIC ) == SYSPAL_ERROR )
{
ri.Sys_Error( ERR_FATAL, "DIB_SetPalette() - SetSystemPaletteUse() failed\n" );
}
/*
** destroy our old palette
*/
if ( sww_state.hPal )
{
DeleteObject( sww_state.hPal );
sww_state.hPal = 0;
}
/*
** take up all physical palette entries to flush out anything that's currently
** in the palette
*/
pLogPal->palVersion = 0x300;
pLogPal->palNumEntries = 256;
for ( i = 0, pal = _pal; i < 256; i++, pal += 4 )
{
pLogPal->palPalEntry[i].peRed = pal[0];
pLogPal->palPalEntry[i].peGreen = pal[1];
pLogPal->palPalEntry[i].peBlue = pal[2];
pLogPal->palPalEntry[i].peFlags = PC_RESERVED | PC_NOCOLLAPSE;
}
pLogPal->palPalEntry[0].peRed = 0;
pLogPal->palPalEntry[0].peGreen = 0;
pLogPal->palPalEntry[0].peBlue = 0;
pLogPal->palPalEntry[0].peFlags = 0;
pLogPal->palPalEntry[255].peRed = 0xff;
pLogPal->palPalEntry[255].peGreen = 0xff;
pLogPal->palPalEntry[255].peBlue = 0xff;
pLogPal->palPalEntry[255].peFlags = 0;
if ( ( sww_state.hPal = CreatePalette( pLogPal ) ) == NULL )
{
ri.Sys_Error( ERR_FATAL, "DIB_SetPalette() - CreatePalette failed(%x)\n", GetLastError() );
}
if ( ( hpalOld = SelectPalette( hDC, sww_state.hPal, FALSE ) ) == NULL )
{
ri.Sys_Error( ERR_FATAL, "DIB_SetPalette() - SelectPalette failed(%x)\n",GetLastError() );
}
if ( sww_state.hpalOld == NULL )
sww_state.hpalOld = hpalOld;
if ( ( ret = RealizePalette( hDC ) ) != pLogPal->palNumEntries )
{
ri.Sys_Error( ERR_FATAL, "DIB_SetPalette() - RealizePalette set %d entries\n", ret );
}
}
}
/*
** DIB_Shutdown
*/
void DIB_Shutdown( void )
{
if ( sww_state.palettized && s_systemcolors_saved )
DIB_RestoreSystemColors();
if ( sww_state.hPal )
{
DeleteObject( sww_state.hPal );
sww_state.hPal = 0;
}
if ( sww_state.hpalOld )
{
SelectPalette( sww_state.hDC, sww_state.hpalOld, FALSE );
RealizePalette( sww_state.hDC );
sww_state.hpalOld = NULL;
}
if ( sww_state.hdcDIBSection )
{
SelectObject( sww_state.hdcDIBSection, previously_selected_GDI_obj );
DeleteDC( sww_state.hdcDIBSection );
sww_state.hdcDIBSection = NULL;
}
if ( sww_state.hDIBSection )
{
DeleteObject( sww_state.hDIBSection );
sww_state.hDIBSection = NULL;
sww_state.pDIBBase = NULL;
}
if ( sww_state.hDC )
{
ReleaseDC( sww_state.hWnd, sww_state.hDC );
sww_state.hDC = 0;
}
}
/*
** DIB_Save/RestoreSystemColors
*/
static void DIB_RestoreSystemColors( void )
{
SetSystemPaletteUse( sww_state.hDC, SYSPAL_STATIC );
SetSysColors( NUM_SYS_COLORS, s_syspalindices, s_oldsyscolors );
}
static void DIB_SaveSystemColors( void )
{
int i;
for ( i = 0; i < NUM_SYS_COLORS; i++ )
s_oldsyscolors[i] = GetSysColor( s_syspalindices[i] );
}