sdl_dibvideo.c

SDL库 在进行视频显示程序spcaview安装时必须的库文件

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    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
    [e-mail]
*/
#include "SDL_config.h"

#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_syswm.h"
#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_sysevents.h"
#include "../../events/SDL_events_c.h"
#include "SDL_dibvideo.h"
#include "../wincommon/SDL_syswm_c.h"
#include "../wincommon/SDL_sysmouse_c.h"
#include "SDL_dibevents_c.h"
#include "../wincommon/SDL_wingl_c.h"

#ifdef _WIN32_WCE
#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
#endif
#ifndef WS_MAXIMIZE
#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 ) {
			SDL_free(device->hidden);
		}
		if ( device->gl_data ) {
			SDL_free(device->gl_data);
		}
		SDL_free(device);
	}
}

static SDL_VideoDevice *DIB_CreateDevice(int devindex)
{
	SDL_VideoDevice *device;

	/* Initialize all variables that we clean on shutdown */
	device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));
	if ( device ) {
		SDL_memset(device, 0, (sizeof *device));
		device->hidden = (struct SDL_PrivateVideoData *)
				SDL_malloc((sizeof *device->hidden));
		device->gl_data = (struct SDL_PrivateGLData *)
				SDL_malloc((sizeof *device->gl_data));
	}
	if ( (device == NULL) || (device->hidden == NULL) ||
		                 (device->gl_data == NULL) ) {
		SDL_OutOfMemory();
		DIB_DeleteDevice(device);
		return(NULL);
	}
	SDL_memset(device->hidden, 0, (sizeof *device->hidden));
	SDL_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;
#if SDL_VIDEO_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_Activate = DIB_Activate;
	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/CE GDI",
	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 */
	if ( bpp < 8 || bpp > 32 ) {  /* 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 *)SDL_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 **)
	       SDL_realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *));
	if ( SDL_modelist[index] == NULL ) {
		SDL_OutOfMemory();
		SDL_nummodes[index] = 0;
		SDL_free(mode);
		return(-1);
	}
	SDL_modelist[index][next_mode] = mode;
	SDL_modelist[index][next_mode+1] = NULL;
	SDL_nummodes[index]++;

	return(0);
}

static void DIB_CreatePalette(_THIS, int bpp)
{
/*	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)
{
	const char *env = NULL;
#ifndef NO_CHANGEDISPLAYSETTINGS
	int i;
	DEVMODE settings;
#endif

	/* Create the window */
	if ( DIB_CreateWindow(this) < 0 ) {
		return(-1);
	}

#if !SDL_AUDIO_DISABLED
	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

	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
	/* Query for the desktop resolution */
	EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &SDL_desktop_mode);
	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 ) {
			SDL_qsort(SDL_modelist[i], SDL_nummodes[i], sizeof *SDL_modelist[i], cmpmodes);
		}
	}
#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));

#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" */
		DIB_CreatePalette(this, vformat->BitsPerPixel);
	}

	/* 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");
	this->hidden->allow_screensaver = ( (env && SDL_atoi(env)) ? 1 : 0 );

	/* 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 depth;
    int dib_size;
    LPBITMAPINFOHEADER dib_hdr;