/*

SDL - Simple DirectMedia Layer

This library is free software; you can redistribute it and/or

This library 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

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Sam Lantinga

#define WIN32_LEAN_AND_MEAN

#include <windows.h>

/* Not yet in the mingw32 cross-compile headers */

#ifndef CDS_FULLSCREEN

#define CDS_FULLSCREEN 4

#endif

#include "../SDL_sysvideo.h"

#include "../SDL_pixels_c.h"

#include "../../events/SDL_sysevents.h"

#include "../../events/SDL_events_c.h"

#include "../wincommon/SDL_syswm_c.h"

#include "../wincommon/SDL_sysmouse_c.h"

#ifdef _WIN32_WCE

#ifndef DM_DISPLAYORIENTATION

#define DM_DISPLAYORIENTATION 0x00800000L

#endif

#ifndef DM_DISPLAYQUERYORIENTATION

#define DM_DISPLAYQUERYORIENTATION 0x01000000L

#endif

#ifndef DMDO_0

#define DMDO_0 0

#endif

#ifndef DMDO_90

#define DMDO_90 1

#endif

#ifndef DMDO_180

#define DMDO_180 2

#endif

#ifndef DMDO_270

#define DMDO_270 4

#endif

#define NO_GETDIBITS

#define NO_GAMMA_SUPPORT

#if _WIN32_WCE < 420

#define NO_CHANGEDISPLAYSETTINGS

#else

#define ChangeDisplaySettings(lpDevMode, dwFlags) ChangeDisplaySettingsEx(NULL, (lpDevMode), 0, (dwFlags), 0)

#endif

#define WS_MAXIMIZE 0

#endif

#ifndef WS_THICKFRAME

#define WS_THICKFRAME 0

#endif

#ifndef SWP_NOCOPYBITS

#define SWP_NOCOPYBITS 0

#endif

#ifndef PC_NOCOLLAPSE

#define PC_NOCOLLAPSE 0

#endif

#ifdef _WIN32_WCE

// defined and used in SDL_sysevents.c

extern HINSTANCE aygshell;

#endif

/* Initialization/Query functions */

static int DIB_VideoInit(_THIS, SDL_PixelFormat *vformat);

static SDL_Rect **DIB_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);

SDL_Surface *DIB_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);

static int DIB_SetColors(_THIS, int firstcolor, int ncolors,

SDL_Color *colors);

static void DIB_CheckGamma(_THIS);

void DIB_SwapGamma(_THIS);

void DIB_QuitGamma(_THIS);

int DIB_SetGammaRamp(_THIS, Uint16 *ramp);

int DIB_GetGammaRamp(_THIS, Uint16 *ramp);

static void DIB_VideoQuit(_THIS);

/* Hardware surface functions */

static int DIB_AllocHWSurface(_THIS, SDL_Surface *surface);

static int DIB_LockHWSurface(_THIS, SDL_Surface *surface);

static void DIB_UnlockHWSurface(_THIS, SDL_Surface *surface);

static void DIB_FreeHWSurface(_THIS, SDL_Surface *surface);

/* Windows message handling functions */

static void DIB_GrabStaticColors(HWND window);

static void DIB_ReleaseStaticColors(HWND window);

static void DIB_Activate(_THIS, BOOL active, BOOL minimized);

static void DIB_RealizePalette(_THIS);

static void DIB_PaletteChanged(_THIS, HWND window);

static void DIB_WinPAINT(_THIS, HDC hdc);

/* helper fn */

static int DIB_SussScreenDepth();

/* DIB driver bootstrap functions */

static int DIB_Available(void)

{

return(1);

}

static void DIB_DeleteDevice(SDL_VideoDevice *device)

{

if ( device ) {

if ( device->hidden ) {

if ( device->hidden->dibInfo ) {

SDL_free( device->hidden->dibInfo );

}

}

if ( device->gl_data ) {

}

}

static SDL_VideoDevice *DIB_CreateDevice(int devindex)

{

SDL_VideoDevice *device;

/* Initialize all variables that we clean on shutdown */

if(device->hidden){

SDL_memset(device->hidden, 0, (sizeof *device->hidden));

device->hidden->dibInfo = (DibInfo *)SDL_malloc((sizeof(DibInfo)));

if(device->hidden->dibInfo == NULL)

{

SDL_free(device->hidden);

device->hidden = NULL;

}

}

}

if ( (device == NULL) || (device->hidden == NULL) ||

(device->gl_data == NULL) ) {

SDL_OutOfMemory();

DIB_DeleteDevice(device);

return(NULL);

}

/* Set the function pointers */

device->VideoInit = DIB_VideoInit;

device->ListModes = DIB_ListModes;

device->SetVideoMode = DIB_SetVideoMode;

device->UpdateMouse = WIN_UpdateMouse;

device->SetColors = DIB_SetColors;

device->UpdateRects = NULL;

device->VideoQuit = DIB_VideoQuit;

device->AllocHWSurface = DIB_AllocHWSurface;

device->CheckHWBlit = NULL;

device->FillHWRect = NULL;

device->SetHWColorKey = NULL;

device->SetHWAlpha = NULL;

device->LockHWSurface = DIB_LockHWSurface;

device->UnlockHWSurface = DIB_UnlockHWSurface;

device->FlipHWSurface = NULL;

device->FreeHWSurface = DIB_FreeHWSurface;

device->SetGammaRamp = DIB_SetGammaRamp;

device->GetGammaRamp = DIB_GetGammaRamp;

device->GL_LoadLibrary = WIN_GL_LoadLibrary;

device->GL_GetProcAddress = WIN_GL_GetProcAddress;

device->GL_GetAttribute = WIN_GL_GetAttribute;

device->GL_MakeCurrent = WIN_GL_MakeCurrent;

device->GL_SwapBuffers = WIN_GL_SwapBuffers;

#endif

device->SetCaption = WIN_SetWMCaption;

device->SetIcon = WIN_SetWMIcon;

device->IconifyWindow = WIN_IconifyWindow;

device->GrabInput = WIN_GrabInput;

device->GetWMInfo = WIN_GetWMInfo;

device->FreeWMCursor = WIN_FreeWMCursor;

device->CreateWMCursor = WIN_CreateWMCursor;

device->ShowWMCursor = WIN_ShowWMCursor;

device->WarpWMCursor = WIN_WarpWMCursor;

device->CheckMouseMode = WIN_CheckMouseMode;

device->InitOSKeymap = DIB_InitOSKeymap;

device->PumpEvents = DIB_PumpEvents;

/* Set up the windows message handling functions */

WIN_RealizePalette = DIB_RealizePalette;

WIN_PaletteChanged = DIB_PaletteChanged;

WIN_WinPAINT = DIB_WinPAINT;

HandleMessage = DIB_HandleMessage;

device->free = DIB_DeleteDevice;

/* We're finally ready */

return device;

}

VideoBootStrap WINDIB_bootstrap = {

DIB_Available, DIB_CreateDevice

};

static int cmpmodes(const void *va, const void *vb)

{

SDL_Rect *a = *(SDL_Rect **)va;

SDL_Rect *b = *(SDL_Rect **)vb;

if ( a->w == b->w )

return b->h - a->h;

else

return b->w - a->w;

}

static int DIB_AddMode(_THIS, int bpp, int w, int h)

{

SDL_Rect *mode;

int i, index;

int next_mode;

/* Check to see if we already have this mode */

return(0);

}

index = ((bpp+7)/8)-1;

for ( i=0; i<SDL_nummodes[index]; ++i ) {

mode = SDL_modelist[index][i];

if ( (mode->w == w) && (mode->h == h) ) {

return(0);

}

}

/* Set up the new video mode rectangle */

if ( mode == NULL ) {

SDL_OutOfMemory();

return(-1);

}

mode->x = 0;

mode->y = 0;

mode->w = w;

mode->h = h;

/* Allocate the new list of modes, and fill in the new mode */

next_mode = SDL_nummodes[index];

SDL_modelist[index] = (SDL_Rect **)

if ( SDL_modelist[index] == NULL ) {

SDL_OutOfMemory();

SDL_nummodes[index] = 0;

return(-1);

}

SDL_modelist[index][next_mode] = mode;

SDL_modelist[index][next_mode+1] = NULL;

SDL_nummodes[index]++;

return(0);

}

{

/* RJR: March 28, 2000

moved palette creation here from "DIB_VideoInit" */

LOGPALETTE *palette;

HDC hdc;

int ncolors;

ncolors = (1 << bpp);

palette = (LOGPALETTE *)SDL_malloc(sizeof(*palette)+

ncolors*sizeof(PALETTEENTRY));

palette->palVersion = 0x300;

palette->palNumEntries = ncolors;

hdc = GetDC(SDL_Window);

GetSystemPaletteEntries(hdc, 0, ncolors, palette->palPalEntry);

ReleaseDC(SDL_Window, hdc);

screen_pal = CreatePalette(palette);

screen_logpal = palette;

}

int DIB_VideoInit(_THIS, SDL_PixelFormat *vformat)

{

#ifndef NO_CHANGEDISPLAYSETTINGS

int i;

DEVMODE settings;

#endif

/* Create the window */

if ( DIB_CreateWindow(this) < 0 ) {

return(-1);

}

/* Determine the screen depth */

vformat->BitsPerPixel = DIB_SussScreenDepth();

switch (vformat->BitsPerPixel) {

case 15:

vformat->Rmask = 0x00007c00;

vformat->Gmask = 0x000003e0;

vformat->Bmask = 0x0000001f;

vformat->BitsPerPixel = 16;

break;

case 16:

vformat->Rmask = 0x0000f800;

vformat->Gmask = 0x000007e0;

vformat->Bmask = 0x0000001f;

break;

case 24:

case 32:

/* GDI defined as 8-8-8 */

vformat->Rmask = 0x00ff0000;

vformat->Gmask = 0x0000ff00;

vformat->Bmask = 0x000000ff;

break;

default:

break;

}

/* See if gamma is supported on this screen */

DIB_CheckGamma(this);

#ifndef NO_CHANGEDISPLAYSETTINGS

settings.dmSize = sizeof(DEVMODE);

settings.dmDriverExtra = 0;

#ifdef _WIN32_WCE

settings.dmFields = DM_DISPLAYQUERYORIENTATION;

this->hidden->supportRotation = ChangeDisplaySettingsEx(NULL, &settings, NULL, CDS_TEST, NULL) == DISP_CHANGE_SUCCESSFUL;

#endif

SDL_desktop_mode.dmSize = sizeof(SDL_desktop_mode);

SDL_desktop_mode.dmDriverExtra = 0;

this->info.current_w = SDL_desktop_mode.dmPelsWidth;

this->info.current_h = SDL_desktop_mode.dmPelsHeight;

/* Query for the list of available video modes */

for ( i=0; EnumDisplaySettings(NULL, i, &settings); ++i ) {

DIB_AddMode(this, settings.dmBitsPerPel,

settings.dmPelsWidth, settings.dmPelsHeight);

#ifdef _WIN32_WCE

if( this->hidden->supportRotation )

DIB_AddMode(this, settings.dmBitsPerPel,

settings.dmPelsHeight, settings.dmPelsWidth);

#endif

}

/* Sort the mode lists */

for ( i=0; i<NUM_MODELISTS; ++i ) {

if ( SDL_nummodes[i] > 0 ) {

}

}

#else

// WinCE and fullscreen mode:

// We use only vformat->BitsPerPixel that allow SDL to

// emulate other bpp (8, 32) and use triple buffer,

// because SDL surface conversion is much faster than the WinCE one.

// Although it should be tested on devices with graphics accelerator.

GetDeviceCaps(GetDC(NULL), HORZRES),

GetDeviceCaps(GetDC(NULL), VERTRES));

#endif /* !NO_CHANGEDISPLAYSETTINGS */

/* Grab an identity palette if we are in a palettized mode */

if ( vformat->BitsPerPixel <= 8 ) {

/* RJR: March 28, 2000

moved palette creation to "DIB_CreatePalette" */

}

/* Fill in some window manager capabilities */

this->info.wm_available = 1;

#ifdef _WIN32_WCE

this->hidden->origRotation = -1;

#endif

/* Allow environment override of screensaver disable. */

env = SDL_getenv("SDL_VIDEO_ALLOW_SCREENSAVER");

if ( env ) {

allow_screensaver = SDL_atoi(env);

} else {

#ifdef SDL_VIDEO_DISABLE_SCREENSAVER

allow_screensaver = 0;

#else

allow_screensaver = 1;

#endif

}

/* We're done! */

return(0);

}

/* We support any format at any dimension */

SDL_Rect **DIB_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)

{

if ( (flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {

return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]);

} else {

return((SDL_Rect **)-1);

}

}

/*

Helper fn to work out which screen depth windows is currently using.

15 bit mode is considered 555 format, 16 bit is 565.

returns 0 for unknown mode.

(Derived from code in sept 1999 Windows Developer Journal

http://www.wdj.com/code/archive.html)

*/

static int DIB_SussScreenDepth()

{

#ifdef NO_GETDIBITS

int depth;

HDC hdc;

hdc = GetDC(SDL_Window);

depth = GetDeviceCaps(hdc, PLANES) * GetDeviceCaps(hdc, BITSPIXEL);

ReleaseDC(SDL_Window, hdc);

return(depth);

#else

int dib_size;

LPBITMAPINFOHEADER dib_hdr;

HDC hdc;

HBITMAP hbm;

/* Allocate enough space for a DIB header plus palette (for

* 8-bit modes) or bitfields (for 16- and 32-bit modes)

*/

dib_size = sizeof(BITMAPINFOHEADER) + 256 * sizeof (RGBQUAD);

dib_hdr = (LPBITMAPINFOHEADER) SDL_malloc(dib_size);

SDL_memset(dib_hdr, 0, dib_size);

dib_hdr->biSize = sizeof(BITMAPINFOHEADER);

/* Get a device-dependent bitmap that's compatible with the

screen.

*/

hdc = GetDC(NULL);

hbm = CreateCompatibleBitmap( hdc, 1, 1 );

/* Convert the DDB to a DIB. We need to call GetDIBits twice:

* the first call just fills in the BITMAPINFOHEADER; the

* second fills in the bitfields or palette.

*/

GetDIBits(hdc, hbm, 0, 1, NULL, (LPBITMAPINFO) dib_hdr, DIB_RGB_COLORS);

GetDIBits(hdc, hbm, 0, 1, NULL, (LPBITMAPINFO) dib_hdr, DIB_RGB_COLORS);

DeleteObject(hbm);

ReleaseDC(NULL, hdc);

switch( dib_hdr->biBitCount )

{

case 8: depth = 8; break;

case 24: depth = 24; break;

case 32: depth = 32; break;

case 16:

if( dib_hdr->biCompression == BI_BITFIELDS ) {

/* check the red mask */

switch( ((DWORD*)((char*)dib_hdr + dib_hdr->biSize))[0] ) {

case 0xf800: depth = 16; break; /* 565 */

case 0x7c00: depth = 15; break; /* 555 */

}

}

}

SDL_free(dib_hdr);

return depth;

#endif /* NO_GETDIBITS */

}

/* Various screen update functions available */

static void DIB_NormalUpdate(_THIS, int numrects, SDL_Rect *rects);

SDL_Surface *DIB_SetVideoMode(_THIS, SDL_Surface *current,

int width, int height, int bpp, Uint32 flags)

{

SDL_Surface *video;

Uint32 prev_flags;

DWORD style;

const DWORD directstyle =

(WS_POPUP);

const DWORD windowstyle =

(WS_OVERLAPPED|WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX);

const DWORD resizestyle =

(WS_THICKFRAME|WS_MAXIMIZEBOX);

int binfo_size;

BITMAPINFO *binfo;

HDC hdc;

RECT bounds;

int x, y;

Uint32 Rmask, Gmask, Bmask;

/*

* Special case for OpenGL windows...since the app needs to call

* SDL_SetVideoMode() in response to resize events to continue to

* function, but WGL handles the GL context details behind the scenes,

* there's no sense in tearing the context down just to rebuild it

* to what it already was...tearing it down sacrifices your GL state

* and uploaded textures. So if we're requesting the same video mode

* attributes and the width/height matches the physical window, just

* return immediately.

*/

if ( (SDL_Window != NULL) &&

(current != NULL) &&

(current->flags == flags) &&

(current->format->BitsPerPixel == bpp) &&

((flags & SDL_FULLSCREEN) == 0) ) { /* probably not safe for fs */

int curwidth, curheight;

RECT size;

/* Get the current position of our window */

GetClientRect(SDL_Window, &size);

curwidth = (size.right - size.left);

curheight = (size.bottom - size.top);

if ((width == curwidth) && (height == curheight)) {

current->w = width;

current->h = height;

return current; /* we're already good to go. */

}

}

prev_flags = current->flags;

/* Clean up any GL context that may be hanging around */

if ( current->flags & SDL_OPENGL ) {

WIN_GL_ShutDown(this);

}

/* Recalculate the bitmasks if necessary */

if ( bpp == current->format->BitsPerPixel ) {

video = current;

} else {

switch (bpp) {

case 15:

case 16:

if ( DIB_SussScreenDepth() == 15 ) {

/* 5-5-5 */

Rmask = 0x00007c00;

Gmask = 0x000003e0;

Bmask = 0x0000001f;

} else {

/* 5-6-5 */

Rmask = 0x0000f800;

Gmask = 0x000007e0;

Bmask = 0x0000001f;

}

break;

case 24:

case 32:

/* GDI defined as 8-8-8 */

Rmask = 0x00ff0000;

Gmask = 0x0000ff00;

Bmask = 0x000000ff;

break;

default:

Rmask = 0x00000000;

Gmask = 0x00000000;

Bmask = 0x00000000;

break;

}

video = SDL_CreateRGBSurface(SDL_SWSURFACE,

0, 0, bpp, Rmask, Gmask, Bmask, 0);

if ( video == NULL ) {

SDL_OutOfMemory();

return(NULL);

}

}

/* Fill in part of the video surface */

prev_w = video->w;

prev_h = video->h;

video->flags = 0; /* Clear flags */

video->w = width;

video->h = height;

video->pitch = SDL_CalculatePitch(video);

/* Small fix for WinCE/Win32 - when activating window

SDL_VideoSurface is equal to zero, so activating code

is not called properly for fullscreen windows because

macros WINDIB_FULLSCREEN uses SDL_VideoSurface

*/

SDL_VideoSurface = video;

#if defined(_WIN32_WCE)

if ( flags & SDL_FULLSCREEN )

video->flags |= SDL_FULLSCREEN;

#endif

#ifndef NO_CHANGEDISPLAYSETTINGS

/* Set fullscreen mode if appropriate */

if ( (flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {

DEVMODE settings;

#ifdef _WIN32_WCE

// try to rotate screen to fit requested resolution

if( this->hidden->supportRotation )

{

DWORD rotation;

// ask current mode

settings.dmFields = DM_DISPLAYORIENTATION;

ChangeDisplaySettingsEx(NULL, &settings, NULL, CDS_TEST, NULL);

rotation = settings.dmDisplayOrientation;

if( (width > GetDeviceCaps(GetDC(NULL), HORZRES))

&& (height < GetDeviceCaps(GetDC(NULL), VERTRES)))

{

switch( rotation )

{

case DMDO_0:

settings.dmDisplayOrientation = DMDO_90;

break;

case DMDO_270:

settings.dmDisplayOrientation = DMDO_180;

break;

}

if( settings.dmDisplayOrientation != rotation )

{

// go to landscape

this->hidden->origRotation = rotation;

ChangeDisplaySettingsEx(NULL,&settings,NULL,CDS_RESET,NULL);

}

}

if( (width < GetDeviceCaps(GetDC(NULL), HORZRES))

&& (height > GetDeviceCaps(GetDC(NULL), VERTRES)))

{

switch( rotation )

{

case DMDO_90:

settings.dmDisplayOrientation = DMDO_0;

break;

case DMDO_180:

settings.dmDisplayOrientation = DMDO_270;

break;

}

if( settings.dmDisplayOrientation != rotation )

{

// go to portrait

this->hidden->origRotation = rotation;

ChangeDisplaySettingsEx(NULL,&settings,NULL,CDS_RESET,NULL);

}

}

}

#endif

#ifndef _WIN32_WCE

settings.dmBitsPerPel = video->format->BitsPerPixel;

settings.dmPelsWidth = width;

settings.dmPelsHeight = height;

settings.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL;

if ( width <= (int)SDL_desktop_mode.dmPelsWidth &&

height <= (int)SDL_desktop_mode.dmPelsHeight ) {

settings.dmDisplayFrequency = SDL_desktop_mode.dmDisplayFrequency;

settings.dmFields |= DM_DISPLAYFREQUENCY;

}

changed = (ChangeDisplaySettings(&settings, CDS_FULLSCREEN) == DISP_CHANGE_SUCCESSFUL);

if ( ! changed && (settings.dmFields & DM_DISPLAYFREQUENCY) ) {

settings.dmFields &= ~DM_DISPLAYFREQUENCY;

changed = (ChangeDisplaySettings(&settings, CDS_FULLSCREEN) == DISP_CHANGE_SUCCESSFUL);

}

#else

changed = 1;

#endif

}

#endif /* !NO_CHANGEDISPLAYSETTINGS */

if ( grab_palette ) {

DIB_ReleaseStaticColors(SDL_Window);

grab_palette = FALSE;

}

if ( screen_pal != NULL ) {

/* RJR: March 28, 2000

delete identity palette if switching from a palettized mode */

DeleteObject(screen_pal);

screen_pal = NULL;

}

if ( screen_logpal != NULL ) {

SDL_free(screen_logpal);

screen_logpal = NULL;

}

if ( bpp <= 8 )

{

/* RJR: March 28, 2000

create identity palette switching to a palettized mode */

}

style &= ~(resizestyle|WS_MAXIMIZE);

if ( (video->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {

style &= ~windowstyle;

style |= directstyle;

} else {

#ifndef NO_CHANGEDISPLAYSETTINGS

if ( (prev_flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {

ChangeDisplaySettings(NULL, 0);

}

#endif

if ( flags & SDL_NOFRAME ) {

style &= ~windowstyle;

style |= directstyle;

video->flags |= SDL_NOFRAME;

} else {

style &= ~directstyle;

style |= windowstyle;

if ( flags & SDL_RESIZABLE ) {

style |= resizestyle;

video->flags |= SDL_RESIZABLE;

}

}

/* Delete the old bitmap if necessary */

if ( screen_bmp != NULL ) {

DeleteObject(screen_bmp);

}

if ( ! (flags & SDL_OPENGL) ) {

BOOL is16bitmode = (video->format->BytesPerPixel == 2);

/* Suss out the bitmap info header */

binfo_size = sizeof(*binfo);

if( is16bitmode ) {

/* 16bit modes, palette area used for rgb bitmasks */

binfo_size += 3*sizeof(DWORD);

} else if ( video->format->palette ) {

binfo_size += video->format->palette->ncolors *

sizeof(RGBQUAD);

}

if ( ! binfo ) {

if ( video != current ) {

SDL_FreeSurface(video);

}

SDL_OutOfMemory();

return(NULL);

}

binfo->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);

binfo->bmiHeader.biWidth = video->w;

binfo->bmiHeader.biHeight = -video->h; /* -ve for topdown bitmap */

binfo->bmiHeader.biPlanes = 1;

binfo->bmiHeader.biSizeImage = video->h * video->pitch;

binfo->bmiHeader.biXPelsPerMeter = 0;

binfo->bmiHeader.biYPelsPerMeter = 0;

binfo->bmiHeader.biClrUsed = 0;

binfo->bmiHeader.biClrImportant = 0;

binfo->bmiHeader.biBitCount = video->format->BitsPerPixel;

if ( is16bitmode ) {

/* BI_BITFIELDS tells CreateDIBSection about the rgb masks in the palette */

binfo->bmiHeader.biCompression = BI_BITFIELDS;

((Uint32*)binfo->bmiColors)[0] = video->format->Rmask;

((Uint32*)binfo->bmiColors)[1] = video->format->Gmask;

((Uint32*)binfo->bmiColors)[2] = video->format->Bmask;

} else {

binfo->bmiHeader.biCompression = BI_RGB; /* BI_BITFIELDS for 565 vs 555 */

if ( video->format->palette ) {

video->format->palette->ncolors*sizeof(RGBQUAD));

}

}

/* Create the offscreen bitmap buffer */

hdc = GetDC(SDL_Window);

screen_bmp = CreateDIBSection(hdc, binfo, DIB_RGB_COLORS,

(void **)(&video->pixels), NULL, 0);

ReleaseDC(SDL_Window, hdc);

if ( screen_bmp == NULL ) {

if ( video != current ) {

SDL_FreeSurface(video);

}

SDL_SetError("Couldn't create DIB section");

return(NULL);

}

this->UpdateRects = DIB_NormalUpdate;

/* Set video surface flags */

if ( screen_pal && (flags & (SDL_FULLSCREEN|SDL_HWPALETTE)) ) {

grab_palette = TRUE;

if ( screen_pal ) {

/* BitBlt() maps colors for us */

video->flags |= SDL_HWPALETTE;

}

#else

if ( !SDL_windowid ) {

#endif

const char *window = NULL;

const char *center = NULL;

window = SDL_getenv("SDL_VIDEO_WINDOW_POS");

center = SDL_getenv("SDL_VIDEO_CENTERED");

SDL_windowX = x;

SDL_windowY = y;

}