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SDL_dibvideo.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#define WIN32_LEAN_AND_MEAN
#include <windows.h>
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/* Not yet in the mingw32 cross-compile headers */
#ifndef CDS_FULLSCREEN
#define CDS_FULLSCREEN 4
#endif
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#include "SDL_syswm.h"
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#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_sysevents.h"
#include "../../events/SDL_events_c.h"
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#include "SDL_dibvideo.h"
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#include "../wincommon/SDL_syswm_c.h"
#include "../wincommon/SDL_sysmouse_c.h"
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#include "SDL_dibevents_c.h"
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#include "../wincommon/SDL_wingl_c.h"
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#ifdef _WIN32_WCE
#define NO_GETDIBITS
#define NO_GAMMA_SUPPORT
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#if _WIN32_WCE < 420
#define NO_CHANGEDISPLAYSETTINGS
#else
#define ChangeDisplaySettings(lpDevMode, dwFlags) ChangeDisplaySettingsEx(NULL, (lpDevMode), 0, (dwFlags), 0)
#endif
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#endif
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#ifndef WS_MAXIMIZE
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#define WS_MAXIMIZE 0
#endif
#ifndef WS_THICKFRAME
#define WS_THICKFRAME 0
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#endif
#ifndef SWP_NOCOPYBITS
#define SWP_NOCOPYBITS 0
#endif
#ifndef PC_NOCOLLAPSE
#define PC_NOCOLLAPSE 0
#endif
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#ifdef _WIN32_WCE
// defined and used in SDL_sysevents.c
extern HINSTANCE aygshell;
#endif
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/* 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);
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void DIB_SwapGamma(_THIS);
void DIB_QuitGamma(_THIS);
int DIB_SetGammaRamp(_THIS, Uint16 *ramp);
int DIB_GetGammaRamp(_THIS, Uint16 *ramp);
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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 ) {
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SDL_free(device->hidden);
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}
if ( device->gl_data ) {
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SDL_free(device->gl_data);
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}
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SDL_free(device);
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}
}
static SDL_VideoDevice *DIB_CreateDevice(int devindex)
{
SDL_VideoDevice *device;
/* Initialize all variables that we clean on shutdown */
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device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));
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if ( device ) {
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SDL_memset(device, 0, (sizeof *device));
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device->hidden = (struct SDL_PrivateVideoData *)
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SDL_malloc((sizeof *device->hidden));
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device->gl_data = (struct SDL_PrivateGLData *)
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SDL_malloc((sizeof *device->gl_data));
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}
if ( (device == NULL) || (device->hidden == NULL) ||
(device->gl_data == NULL) ) {
SDL_OutOfMemory();
DIB_DeleteDevice(device);
return(NULL);
}
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SDL_memset(device->hidden, 0, (sizeof *device->hidden));
SDL_memset(device->gl_data, 0, (sizeof *device->gl_data));
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/* 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;
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#if SDL_VIDEO_OPENGL
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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;
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#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 = {
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"windib", "Win95/98/NT/2000/CE GDI",
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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;
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if ( a->w == b->w )
return b->h - a->h;
else
return b->w - a->w;
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}
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 */
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mode = (SDL_Rect *)SDL_malloc(sizeof *mode);
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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 **)
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SDL_realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *));
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if ( SDL_modelist[index] == NULL ) {
SDL_OutOfMemory();
SDL_nummodes[index] = 0;
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SDL_free(mode);
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return(-1);
}
SDL_modelist[index][next_mode] = mode;
SDL_modelist[index][next_mode+1] = NULL;
SDL_nummodes[index]++;
return(0);
}
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;
}
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palette = (LOGPALETTE *)SDL_malloc(sizeof(*palette)+
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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);
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SDL_free(palette);
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}
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);
}
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#if !SDL_AUDIO_DISABLED
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DX5_SoundFocus(SDL_Window);
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#endif
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/* 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
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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
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/* Query for the desktop resolution */
EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &SDL_desktop_mode);
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/* 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);
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#ifdef _WIN32_WCE
if( this->hidden->supportRotation )
DIB_AddMode(this, settings.dmBitsPerPel,
settings.dmPelsHeight, settings.dmPelsWidth);
#endif
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}
/* Sort the mode lists */
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if( i > 1 )
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for ( i=0; i<NUM_MODELISTS; ++i ) {
if ( SDL_nummodes[i] > 0 ) {
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SDL_qsort(SDL_modelist[i], SDL_nummodes[i], sizeof *SDL_modelist[i], cmpmodes);
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}
}
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#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.
DIB_AddMode(this, vformat->BitsPerPixel,
GetDeviceCaps(GetDC(NULL), HORZRES),
GetDeviceCaps(GetDC(NULL), VERTRES));
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#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;
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#ifdef _WIN32_WCE
this->hidden->origRotation = -1;
#endif
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/* 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);
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dib_hdr = (LPBITMAPINFOHEADER) SDL_malloc(dib_size);
SDL_memset(dib_hdr, 0, dib_size);
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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);
const DWORD resizestyle =
(WS_THICKFRAME|WS_MAXIMIZEBOX);
int binfo_size;
BITMAPINFO *binfo;
HDC hdc;
RECT bounds;
int x, y;
Uint32 Rmask, Gmask, Bmask;
/* Clean up any GL context that may be hanging around */
if ( current->flags & SDL_OPENGL ) {
WIN_GL_ShutDown(this);
}
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SDL_resizing = 1;
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/* 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);
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/* 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 )
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video->flags |= SDL_FULLSCREEN;
#endif
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#ifndef NO_CHANGEDISPLAYSETTINGS
/* Set fullscreen mode if appropriate */
if ( (flags & SDL_FULLSCREEN) == SDL_FULLSCREEN ) {
DEVMODE settings;
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BOOL changed;
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SDL_memset(&settings, 0, sizeof(DEVMODE));
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settings.dmSize = sizeof(DEVMODE);
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#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
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settings.dmBitsPerPel = video->format->BitsPerPixel;
settings.dmPelsWidth = width;
settings.dmPelsHeight = height;
settings.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL;
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if ( width <= (int)SDL_desktop_mode.dmPelsWidth &&
height <= (int)SDL_desktop_mode.dmPelsHeight ) {
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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);
}
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#else
changed = 1;
#endif
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if ( changed ) {
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video->flags |= SDL_FULLSCREEN;
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SDL_fullscreen_mode = settings;
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}
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}
#endif /* !NO_CHANGEDISPLAYSETTINGS */
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/* 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);
}
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style = GetWindowLong(SDL_Window, GWL_STYLE);
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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;
}
}
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#if WS_MAXIMIZE
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if (IsZoomed(SDL_Window)) style |= WS_MAXIMIZE;
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#endif
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}
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/* DJM: Don't piss of anyone who has setup his own window */
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if ( !SDL_windowid )
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SetWindowLong(SDL_Window, GWL_STYLE, style);
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/* 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);
}
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binfo = (BITMAPINFO *)SDL_malloc(binfo_size);
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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 ) {
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SDL_memset(binfo->bmiColors, 0,
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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);
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SDL_free(binfo);
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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;
}
}
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#ifndef _WIN32_WCE
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/* Resize the window */
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if ( !SDL_windowid && !IsZoomed(SDL_Window) ) {
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#else
if ( !SDL_windowid ) {
#endif
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HWND top;
760
UINT swp_flags;
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const char *window = NULL;
const char *center = NULL;
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if ( !SDL_windowX && !SDL_windowY ) {
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window = SDL_getenv("SDL_VIDEO_WINDOW_POS");
center = SDL_getenv("SDL_VIDEO_CENTERED");
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if ( window ) {
768
if ( SDL_sscanf(window, "%d,%d", &x, &y) == 2 ) {
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SDL_windowX = x;
SDL_windowY = y;
}
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if ( SDL_strcmp(window, "center") == 0 ) {
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center = window;
}
}
}
swp_flags = (SWP_NOCOPYBITS | SWP_SHOWWINDOW);
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bounds.left = SDL_windowX;
bounds.top = SDL_windowY;
bounds.right = SDL_windowX+video->w;
bounds.bottom = SDL_windowY+video->h;
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AdjustWindowRectEx(&bounds, GetWindowLong(SDL_Window, GWL_STYLE), FALSE, 0);
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width = bounds.right-bounds.left;
height = bounds.bottom-bounds.top;
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if ( (flags & SDL_FULLSCREEN) ) {
x = (GetSystemMetrics(SM_CXSCREEN)-width)/2;
y = (GetSystemMetrics(SM_CYSCREEN)-height)/2;
} else if ( center ) {
x = (GetSystemMetrics(SM_CXSCREEN)-width)/2;
y = (GetSystemMetrics(SM_CYSCREEN)-height)/2;
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} else if ( SDL_windowX || SDL_windowY || window ) {
x = bounds.left;
y = bounds.top;
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} else {
x = y = -1;
swp_flags |= SWP_NOMOVE;
}
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if ( flags & SDL_FULLSCREEN ) {
top = HWND_TOPMOST;
} else {
top = HWND_NOTOPMOST;
}
SetWindowPos(SDL_Window, top, x, y, width, height, swp_flags);
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if ( !(flags & SDL_FULLSCREEN) ) {
SDL_windowX = SDL_bounds.left;
SDL_windowY = SDL_bounds.top;
}
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SetForegroundWindow(SDL_Window);
}
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SDL_resizing = 0;
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/* Set up for OpenGL */
if ( flags & SDL_OPENGL ) {
if ( WIN_GL_SetupWindow(this) < 0 ) {
return(NULL);
}
video->flags |= SDL_OPENGL;
}
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/* 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);
}
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int DIB_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
{
865
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#if !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
HDC hdc, mdc;
867
RGBQUAD *pal;
868
#else
869
HDC hdc;
870
#endif
871
int i;
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/* Update the display palette */
hdc = GetDC(SDL_Window);
if ( screen_pal ) {
PALETTEENTRY *entries;
878
entries = SDL_stack_alloc(PALETTEENTRY, ncolors);
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for ( i=0; i<ncolors; ++i ) {
entries[i].peRed = colors[i].r;
entries[i].peGreen = colors[i].g;
entries[i].peBlue = colors[i].b;
entries[i].peFlags = PC_NOCOLLAPSE;
}
SetPaletteEntries(screen_pal, firstcolor, ncolors, entries);
SelectPalette(hdc, screen_pal, FALSE);
RealizePalette(hdc);
888
SDL_stack_free(entries);
889
890
}
891
#if !defined(_WIN32_WCE) || (_WIN32_WCE >= 400)
892
/* Copy palette colors into DIB palette */
893
pal = SDL_stack_alloc(RGBQUAD, ncolors);
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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 */
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);
908
SDL_stack_free(pal);
909
#endif
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ReleaseDC(SDL_Window, hdc);
return(1);
}
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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 */
}
930
void DIB_SwapGamma(_THIS)
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{
#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 */
}
949
void DIB_QuitGamma(_THIS)
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{
#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 */
963
SDL_free(gamma_saved);
964
965
966
967
968
gamma_saved = 0;
}
#endif /* !NO_GAMMA_SUPPORT */
}
969
int DIB_SetGammaRamp(_THIS, Uint16 *ramp)
970
{
971
972
973
974
#ifdef NO_GAMMA_SUPPORT
SDL_SetError("SDL compiled without gamma ramp support");
return -1;
#else
975
976
977
978
979
HDC hdc;
BOOL succeeded;
/* Set the ramp for the display */
if ( ! gamma_saved ) {
980
gamma_saved = (WORD *)SDL_malloc(3*256*sizeof(*gamma_saved));
981
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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;
997
#endif /* !NO_GAMMA_SUPPORT */
998
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}
1000
int DIB_GetGammaRamp(_THIS, Uint16 *ramp)