/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997, 1998, 1999 Sam Lantinga

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

modify it under the terms of the GNU Library General Public

License as published by the Free Software Foundation; either

version 2 of the License, or (at your option) any later version.

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

Library General Public License for more details.

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

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

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Sam Lantinga

slouken@libsdl.org

*/

#ifdef SAVE_RCSID

static char rcsid =

"@(#) $Id$";

#endif

#include <stdio.h>

#include <stdlib.h>

#include <malloc.h>

#include <windows.h>

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

#ifndef CDS_FULLSCREEN

#define CDS_FULLSCREEN 4

#endif

#include "SDL.h"

#include "SDL_mutex.h"

#include "SDL_syswm.h"

#include "SDL_sysvideo.h"

#include "SDL_sysevents.h"

#include "SDL_events_c.h"

#include "SDL_pixels_c.h"

#include "SDL_dibvideo.h"

#include "SDL_syswm_c.h"

#include "SDL_sysmouse_c.h"

#include "SDL_dibevents_c.h"

#include "SDL_wingl_c.h"

#ifdef _WIN32_WCE

#define NO_GETDIBITS

#define NO_CHANGEDISPLAYSETTINGS

#define NO_GAMMA_SUPPORT

#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_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 ) {

free(device->hidden);

}

if ( device->gl_data ) {

free(device->gl_data);

}

free(device);

}

}

static SDL_VideoDevice *DIB_CreateDevice(int devindex)

{

SDL_VideoDevice *device;

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

device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));

if ( device ) {

memset(device, 0, (sizeof *device));

device->hidden = (struct SDL_PrivateVideoData *)

malloc((sizeof *device->hidden));

device->gl_data = (struct SDL_PrivateGLData *)

malloc((sizeof *device->gl_data));

}

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

(device->gl_data == NULL) ) {

SDL_OutOfMemory();

DIB_DeleteDevice(device);

return(NULL);

}

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

memset(device->gl_data, 0, (sizeof *device->gl_data));

/* 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;

#ifdef HAVE_OPENGL

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 = {

"windib", "Win95/98/NT/2000 GDI",

DIB_Available, DIB_CreateDevice

};

#ifndef NO_CHANGEDISPLAYSETTINGS

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 -1;

return b->h - a->h;

}

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 */

if ( bpp < 8 ) { /* Not supported */

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 */

mode = (SDL_Rect *)malloc(sizeof *mode);

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 **)

realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *));

if ( SDL_modelist[index] == NULL ) {

SDL_OutOfMemory();

SDL_nummodes[index] = 0;

free(mode);

return(-1);

}

SDL_modelist[index][next_mode] = mode;

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

SDL_nummodes[index]++;

return(0);

}

#endif /* !NO_CHANGEDISPLAYSETTINGS */

static HPALETTE DIB_CreatePalette(int bpp)

{

/* RJR: March 28, 2000

moved palette creation here from "DIB_VideoInit" */

HPALETTE handle = NULL;

if ( bpp <= 8 )

{

LOGPALETTE *palette;

HDC hdc;

int ncolors;

int i;

ncolors = 1;

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

ncolors *= 2;

}

palette = (LOGPALETTE *)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);

handle = CreatePalette(palette);

free(palette);

}

return handle;

}

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);

}

#ifndef DISABLE_AUDIO

DX5_SoundFocus(SDL_Window);

#endif

/* 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

/* 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);

}

/* Sort the mode lists */

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

if ( SDL_nummodes[i] > 0 ) {

qsort(SDL_modelist[i], SDL_nummodes[i], sizeof *SDL_modelist[i], cmpmodes);

}

}

#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" */

screen_pal = DIB_CreatePalette(vformat->BitsPerPixel);

}

/* Fill in some window manager capabilities */

this->info.wm_available = 1;

/* We're done! */

return(0);

}

/* We support any format at any dimension */

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

{

#ifdef NO_CHANGEDISPLAYSETTINGS

return((SDL_Rect **)-1);

#else

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

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

} else {

return((SDL_Rect **)-1);

}

#endif

}

/*

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);

#ifndef _WIN32_WCE

// AFAIK 16 bit CE devices have indeed RGB 565

if ( depth == 16 ) {

depth = 15; /* GDI defined as RGB 555 */

}

#endif

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) malloc(dib_size);

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: return 8;

case 24: return 24;

case 32: return 32;

case 16:

if( dib_hdr->biCompression == BI_BITFIELDS ) {

/* check the red mask */

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

case 0xf800: return 16; /* 565 */

case 0x7c00: return 15; /* 555 */

}

}

}

return 0; /* poo. */

#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);

#ifndef _WIN32_WCE

const DWORD resizestyle =

(WS_THICKFRAME|WS_MAXIMIZEBOX);

#endif

int binfo_size;

BITMAPINFO *binfo;

HDC hdc;

RECT bounds;

int x, y;

BOOL was_visible;

Uint32 Rmask, Gmask, Bmask;

/* See whether or not we should center the window */

was_visible = IsWindowVisible(SDL_Window);

#ifdef HAVE_OPENGL

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

if ( current->flags & SDL_OPENGL ) {

WIN_GL_ShutDown(this);

}

#endif /* HAVE_OPENGL */

/* 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_flags = video->flags;

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

video->w = width;

video->h = height;

video->pitch = SDL_CalculatePitch(video);

#ifndef NO_CHANGEDISPLAYSETTINGS

/* Set fullscreen mode if appropriate */

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

DEVMODE settings;

memset(&settings, 0, sizeof(DEVMODE));

settings.dmSize = sizeof(DEVMODE);

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

settings.dmPelsWidth = width;

settings.dmPelsHeight = height;

settings.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL;

if ( ChangeDisplaySettings(&settings, CDS_FULLSCREEN) == DISP_CHANGE_SUCCESSFUL ) {

video->flags |= SDL_FULLSCREEN;

SDL_fullscreen_mode = settings;

}

}

#endif /* !NO_CHANGEDISPLAYSETTINGS */

/* Reset the palette and create a new one if necessary */

if ( screen_pal != NULL ) {

/* RJR: March 28, 2000

delete identity palette if switching from a palettized mode */

DeleteObject(screen_pal);

screen_pal = NULL;

}

if ( bpp <= 8 )

{

/* RJR: March 28, 2000

create identity palette switching to a palettized mode */

screen_pal = DIB_CreatePalette(bpp);

}

style = GetWindowLong(SDL_Window, GWL_STYLE);

#ifndef _WIN32_WCE

style &= ~(resizestyle|WS_MAXIMIZE);

#endif

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 ) {

#ifndef _WIN32_WCE

style |= resizestyle;

#endif

video->flags |= SDL_RESIZABLE;

}

}

#ifndef _WIN32_WCE

if (IsZoomed(SDL_Window)) style |= WS_MAXIMIZE;

#endif

}

/* DJM: Don't piss of anyone who has setup his own window */

if (!SDL_windowid)

SetWindowLong(SDL_Window, GWL_STYLE, style);

/* 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);

}

binfo = (BITMAPINFO *)malloc(binfo_size);

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 ) {

memset(binfo->bmiColors, 0,

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);

free(binfo);

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 ( bpp <= 8 ) {

/* BitBlt() maps colors for us */

video->flags |= SDL_HWPALETTE;

}

}

/* Resize the window */

if ( SDL_windowid == NULL ) {

UINT swp_flags;

SDL_resizing = 1;

bounds.left = 0;

bounds.top = 0;

bounds.right = video->w;

bounds.bottom = video->h;

#ifndef _WIN32_WCE

AdjustWindowRect(&bounds, GetWindowLong(SDL_Window, GWL_STYLE), FALSE);

#else

AdjustWindowRectEx(&bounds, GetWindowLong(SDL_Window, GWL_STYLE), FALSE,0);

#endif

width = bounds.right-bounds.left;

height = bounds.bottom-bounds.top;

x = (GetSystemMetrics(SM_CXSCREEN)-width)/2;

y = (GetSystemMetrics(SM_CYSCREEN)-height)/2;

if ( y < 0 ) { /* Cover up title bar for more client area */

y -= GetSystemMetrics(SM_CYCAPTION)/2;

}

#ifndef _WIN32_WCE

swp_flags = (SWP_NOCOPYBITS | SWP_NOZORDER | SWP_SHOWWINDOW);

#else

swp_flags = (SWP_NOZORDER | SWP_SHOWWINDOW);

#endif

if ( was_visible && !(flags & SDL_FULLSCREEN) ) {

swp_flags |= SWP_NOMOVE;

}

SetWindowPos(SDL_Window, NULL, x, y, width, height, swp_flags);

SDL_resizing = 0;

SetForegroundWindow(SDL_Window);

}

#ifdef HAVE_OPENGL

/* Set up for OpenGL */

if ( flags & SDL_OPENGL ) {

if ( WIN_GL_SetupWindow(this) < 0 ) {

return(NULL);

}

video->flags |= SDL_OPENGL;

}

#endif /* HAVE_OPENGL */

/* We're live! */

return(video);

}

/* We don't actually allow hardware surfaces in the DIB driver */

static int DIB_AllocHWSurface(_THIS, SDL_Surface *surface)

{

return(-1);

}

static void DIB_FreeHWSurface(_THIS, SDL_Surface *surface)

{

return;

}

static int DIB_LockHWSurface(_THIS, SDL_Surface *surface)

{

return(0);

}

static void DIB_UnlockHWSurface(_THIS, SDL_Surface *surface)

{

return;

}

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

{

HDC hdc, mdc;

int i;

hdc = GetDC(SDL_Window);

if ( screen_pal ) {

SelectPalette(hdc, screen_pal, FALSE);

}

mdc = CreateCompatibleDC(hdc);

SelectObject(mdc, screen_bmp);

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

BitBlt(hdc, rects[i].x, rects[i].y, rects[i].w, rects[i].h,

mdc, rects[i].x, rects[i].y, SRCCOPY);

}

DeleteDC(mdc);

ReleaseDC(SDL_Window, hdc);

}

int DIB_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)

{

RGBQUAD *pal;

int i;

#ifndef _WIN32_WCE

HDC hdc, mdc;

#else

HDC hdc;

#endif

/* Update the display palette */

hdc = GetDC(SDL_Window);

if ( screen_pal ) {

PALETTEENTRY *entries;

entries = (PALETTEENTRY *)alloca(ncolors*sizeof(PALETTEENTRY));

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

entries[i].peRed = colors[i].r;

entries[i].peGreen = colors[i].g;

entries[i].peBlue = colors[i].b;

#ifndef _WIN32_WCE

entries[i].peFlags = PC_NOCOLLAPSE;

#else

entries[i].peFlags = 0;

#endif

}

SetPaletteEntries(screen_pal, firstcolor, ncolors, entries);

SelectPalette(hdc, screen_pal, FALSE);

RealizePalette(hdc);

}

/* Copy palette colors into DIB palette */

pal = (RGBQUAD *)alloca(ncolors*sizeof(RGBQUAD));

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

pal[i].rgbRed = colors[i].r;

pal[i].rgbGreen = colors[i].g;

pal[i].rgbBlue = colors[i].b;

pal[i].rgbReserved = 0;

}

/* Set the DIB palette and update the display */

#ifndef _WIN32_WCE

mdc = CreateCompatibleDC(hdc);

SelectObject(mdc, screen_bmp);

SetDIBColorTable(mdc, firstcolor, ncolors, pal);

BitBlt(hdc, 0, 0, this->screen->w, this->screen->h,

mdc, 0, 0, SRCCOPY);

DeleteDC(mdc);

#endif

ReleaseDC(SDL_Window, hdc);

return(1);

}

static void DIB_CheckGamma(_THIS)

{

#ifndef NO_GAMMA_SUPPORT

HDC hdc;

WORD ramp[3*256];

/* If we fail to get gamma, disable gamma control */

hdc = GetDC(SDL_Window);

if ( ! GetDeviceGammaRamp(hdc, ramp) ) {

this->GetGammaRamp = NULL;

this->SetGammaRamp = NULL;

}

ReleaseDC(SDL_Window, hdc);

#endif /* !NO_GAMMA_SUPPORT */

}

void DIB_SwapGamma(_THIS)

{

#ifndef NO_GAMMA_SUPPORT

HDC hdc;

if ( gamma_saved ) {

hdc = GetDC(SDL_Window);

if ( SDL_GetAppState() & SDL_APPINPUTFOCUS ) {

/* About to leave active state, restore gamma */

SetDeviceGammaRamp(hdc, gamma_saved);

} else {

/* About to enter active state, set game gamma */

GetDeviceGammaRamp(hdc, gamma_saved);

SetDeviceGammaRamp(hdc, this->gamma);

}

ReleaseDC(SDL_Window, hdc);

}

#endif /* !NO_GAMMA_SUPPORT */

}

void DIB_QuitGamma(_THIS)

{

#ifndef NO_GAMMA_SUPPORT

if ( gamma_saved ) {

/* Restore the original gamma if necessary */

if ( SDL_GetAppState() & SDL_APPINPUTFOCUS ) {

HDC hdc;

hdc = GetDC(SDL_Window);

SetDeviceGammaRamp(hdc, gamma_saved);

ReleaseDC(SDL_Window, hdc);

}

/* Free the saved gamma memory */

free(gamma_saved);

gamma_saved = 0;

}

#endif /* !NO_GAMMA_SUPPORT */

}

int DIB_SetGammaRamp(_THIS, Uint16 *ramp)

{

#ifdef NO_GAMMA_SUPPORT

SDL_SetError("SDL compiled without gamma ramp support");

return -1;

#else

HDC hdc;

BOOL succeeded;

/* Set the ramp for the display */

if ( ! gamma_saved ) {

gamma_saved = (WORD *)malloc(3*256*sizeof(*gamma_saved));

if ( ! gamma_saved ) {

SDL_OutOfMemory();

return -1;

}

hdc = GetDC(SDL_Window);

GetDeviceGammaRamp(hdc, gamma_saved);

ReleaseDC(SDL_Window, hdc);

}

if ( SDL_GetAppState() & SDL_APPINPUTFOCUS ) {

hdc = GetDC(SDL_Window);

succeeded = SetDeviceGammaRamp(hdc, ramp);

ReleaseDC(SDL_Window, hdc);

} else {

succeeded = TRUE;

}

return succeeded ? 0 : -1;

#endif /* !NO_GAMMA_SUPPORT */

}

int DIB_GetGammaRamp(_THIS, Uint16 *ramp)

{

#ifdef NO_GAMMA_SUPPORT

SDL_SetError("SDL compiled without gamma ramp support");

return -1;

#else

HDC hdc;

BOOL succeeded;

/* Get the ramp from the display */

hdc = GetDC(SDL_Window);

succeeded = GetDeviceGammaRamp(hdc, ramp);

ReleaseDC(SDL_Window, hdc);

return succeeded ? 0 : -1;

#endif /* !NO_GAMMA_SUPPORT */

}

void DIB_VideoQuit(_THIS)

{

/* Destroy the window and everything associated with it */

if ( SDL_Window ) {

/* Delete the screen bitmap (also frees screen->pixels) */

if ( this->screen ) {

#ifndef NO_CHANGEDISPLAYSETTINGS

if ( this->screen->flags & SDL_FULLSCREEN ) {

ChangeDisplaySettings(NULL, 0);

ShowWindow(SDL_Window, SW_HIDE);

}

#endif

#ifdef HAVE_OPENGL

if ( this->screen->flags & SDL_OPENGL ) {

WIN_GL_ShutDown(this);

}

#endif /* HAVE_OPENGL */

this->screen->pixels = NULL;

}

if ( screen_bmp ) {

DeleteObject(screen_bmp);

screen_bmp = NULL;

}

if ( screen_icn ) {

DestroyIcon(screen_icn);

screen_icn = NULL;

}

DIB_QuitGamma(this);

DIB_DestroyWindow(this);

SDL_Window = NULL;

}

}

/* Exported for the windows message loop only */

static void DIB_FocusPalette(_THIS, int foreground)

{

if ( screen_pal != NULL ) {

HDC hdc;

hdc = GetDC(SDL_Window);

SelectPalette(hdc, screen_pal, FALSE);

if ( RealizePalette(hdc) )

InvalidateRect(SDL_Window, NULL, FALSE);

ReleaseDC(SDL_Window, hdc);

}

}

static void DIB_RealizePalette(_THIS)

{

DIB_FocusPalette(this, 1);

}

static void DIB_PaletteChanged(_THIS, HWND window)

{

if ( window != SDL_Window ) {

DIB_FocusPalette(this, 0);

}

}

/* Exported for the windows message loop only */

static void DIB_WinPAINT(_THIS, HDC hdc)

{

HDC mdc;

if ( screen_pal ) {

SelectPalette(hdc, screen_pal, FALSE);

}

mdc = CreateCompatibleDC(hdc);

SelectObject(mdc, screen_bmp);

BitBlt(hdc, 0, 0, SDL_VideoSurface->w, SDL_VideoSurface->h,

mdc, 0, 0, SRCCOPY);

DeleteDC(mdc);

}

/* Stub in case DirectX isn't available */

#ifndef ENABLE_DIRECTX

void DX5_SoundFocus(HWND hwnd)

{

return;

}

#endif