static int GetBPP(void)
{
DDPIXELFORMAT ddpix;
memset(&ddpix,0,sizeof(ddpix));
ddpix.dwSize=sizeof(ddpix);
ddrval=IDirectDrawSurface7_GetPixelFormat(lpDDSPrimary,&ddpix);
if (ddrval != DD_OK)
{
//ShowDDErr("Error getting primary surface pixel format.");
FCEU_printf("Error getting primary surface pixel format.\n");
return 0;
}
if(ddpix.dwFlags&DDPF_RGB)
{
//mbg merge 7/17/06 removed silly dummy union stuff now that we have c++
bpp=ddpix.dwRGBBitCount;
CBM[0]=ddpix.dwRBitMask;
CBM[1]=ddpix.dwGBitMask;
CBM[2]=ddpix.dwBBitMask;
}
else
{
//ShowDDErr("RGB data not valid.");
FCEU_printf("RGB data not valid.\n");
return 0;
}
if(bpp==15) bpp=16;
return 1;
}
boolean Overlay( LPDIRECTDRAWSURFACE7 src_surface, RECT * src_rect,
LPDIRECTDRAWSURFACE7 dst_surface, RECT * dst_rect,
COLORREF color_key )
{
DWORD dw_color_key;
DDPIXELFORMAT ddpf;
DDOVERLAYFX ddofx;
int flags;
HRESULT result;
// compute the colorkey pixel value from the RGB value we've got/
// NOTE : based on videolan colorkey code
memset( &ddpf, 0, sizeof( DDPIXELFORMAT ));
ddpf.dwSize = sizeof( DDPIXELFORMAT );
result = IDirectDrawSurface7_GetPixelFormat( dst_surface, &ddpf );
if( result != DD_OK )
{
Error( 0, "IDirectDrawSurface7_GetPixelFormat : could not get surface pixel format" );
return FALSE;
}
dw_color_key = ( DWORD ) color_key;
dw_color_key = ( DWORD ) ( ( ( dw_color_key * ddpf.dwRBitMask ) / 255 ) & ddpf.dwRBitMask );
memset( &ddofx, 0, sizeof( DDOVERLAYFX ) );
ddofx.dwSize = sizeof( DDOVERLAYFX );
ddofx.dckDestColorkey.dwColorSpaceLowValue = dw_color_key;
ddofx.dckDestColorkey.dwColorSpaceHighValue = dw_color_key;
// set our overlay flags
flags = DDOVER_SHOW | DDOVER_KEYDESTOVERRIDE;
// attempt to overlay the surface
result = IDirectDrawSurface7_UpdateOverlay( src_surface, src_rect, dst_surface, dst_rect, flags, &ddofx );
if( result != DD_OK )
{
if( result == DDERR_SURFACELOST )
{
IDirectDrawSurface7_Restore( src_surface );
IDirectDrawSurface7_Restore( dst_surface );
IDirectDrawSurface7_UpdateOverlay( src_surface, src_rect, dst_surface, dst_rect, flags, &ddofx );
}
else
{
Error( 0, "IDirectDrawSurface7_UpdateOverlay : error %i", result );
return FALSE;
}
}
return TRUE;
}
boolean CheckPixelFormat( win32_driver_t * win32_driver )
{
DDPIXELFORMAT ddpf;
HRESULT result;
// get the pixel format of our primary surface
memset( &ddpf, 0, sizeof( DDPIXELFORMAT ));
ddpf.dwSize = sizeof( DDPIXELFORMAT );
result = IDirectDrawSurface7_GetPixelFormat( win32_driver->primary, &ddpf );
if( result != DD_OK )
{
Error( 0, "IDirectDrawSurface7_GetPixelFormat ( CheckPixelFormat ) : error %u", result );
return 0;
}
// TODO : support paletized video modes
if( ( ddpf.dwFlags & DDPF_PALETTEINDEXED1 ) ||
( ddpf.dwFlags & DDPF_PALETTEINDEXED2 ) ||
( ddpf.dwFlags & DDPF_PALETTEINDEXED4 ) ||
( ddpf.dwFlags & DDPF_PALETTEINDEXED8 ) ||
( ddpf.dwFlags & DDPF_PALETTEINDEXEDTO8 ) )
return FALSE;
// store bytes per pixel
win32_driver->bytespp = ddpf.dwRGBBitCount / 8;
// find the rgb mode for software
// colorspace conversion
if( ddpf.dwRGBBitCount == 32 )
{
if( ddpf.dwRBitMask == 0xff0000 )
win32_driver->mode = MODE_32_RGB;
else
win32_driver->mode = MODE_32_BGR;
}
if( ddpf.dwRGBBitCount == 24 )
{
if( ddpf.dwRBitMask == 0xff0000 )
win32_driver->mode = MODE_24_RGB;
else
win32_driver->mode = MODE_24_BGR;
}
if( ddpf.dwRGBBitCount == 16 )
{
if( ddpf.dwRBitMask == 0xf800 )
win32_driver->mode = MODE_16_RGB;
else
win32_driver->mode = MODE_16_BGR;
}
if( ddpf.dwRGBBitCount == 15 )
{
if( ddpf.dwRBitMask == 0x7C00 )
win32_driver->mode = MODE_15_RGB;
else
win32_driver->mode = MODE_15_BGR;
}
return TRUE;
}
static int
_directdraw_init (HWND window,
LPDIRECTDRAW *object,
LPDIRECTDRAWSURFACE *surface_primary,
LPDIRECTDRAWSURFACE *surface_back,
int *depth,
int width,
int height)
{
DDSURFACEDESC2 surface_desc;
DDPIXELFORMAT pixel_format;
LPDIRECTDRAWCLIPPER clipper;
LPDIRECTDRAW o;
DDSURFACEDESC2 *sd;
HRESULT res;
res = DirectDrawCreateEx (NULL, (void **)&o, &IID_IDirectDraw7, NULL);
if (FAILED(res))
return 0;
res = IDirectDraw7_SetCooperativeLevel (o, window, DDSCL_NORMAL);
if (FAILED(res))
{
IDirectDraw7_Release (o);
return 0;
}
res = IDirectDraw7_CreateClipper (o, 0, &clipper, NULL);
if (FAILED(res))
{
IDirectDraw7_Release (o);
return 0;
}
res = IDirectDrawClipper_SetHWnd (clipper, 0, window);
if (FAILED(res))
{
IDirectDrawClipper_Release (clipper);
IDirectDraw7_Release (o);
return 0;
}
memset(&surface_desc, 0, sizeof(surface_desc));
surface_desc.dwSize = sizeof(surface_desc);
surface_desc.dwFlags = DDSD_CAPS;
surface_desc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
sd=&surface_desc;
res = IDirectDraw7_CreateSurface (o, &surface_desc,
surface_primary, NULL);
if (FAILED(res))
{
IDirectDrawClipper_Release (clipper);
IDirectDraw7_Release (o);
return 0;
}
res = IDirectDrawSurface7_SetClipper (*surface_primary, clipper);
if (FAILED(res))
{
IDirectDrawClipper_Release (clipper);
IDirectDrawSurface7_Release (*surface_primary);
IDirectDraw7_Release (o);
return 0;
}
memset (&surface_desc, 0, sizeof(surface_desc));
surface_desc.dwSize = sizeof(surface_desc);
surface_desc.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
surface_desc.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
surface_desc.dwWidth = width;
surface_desc.dwHeight = height;
sd=&surface_desc;
res = IDirectDraw7_CreateSurface (o, (DDSURFACEDESC *)sd,
surface_back, NULL);
if (FAILED(res))
{
IDirectDrawClipper_Release (clipper);
IDirectDrawSurface7_Release (*surface_primary);
IDirectDraw7_Release (o);
return 0;
}
ZeroMemory(&pixel_format, sizeof(pixel_format));
pixel_format.dwSize = sizeof(pixel_format);
IDirectDrawSurface7_GetPixelFormat(*surface_primary, &pixel_format);
*object = o;
*depth = pixel_format.dwRGBBitCount;
return 1;
}