sdl_sysvideo.cc

SDL库 在进行视频显示程序spcaview安装时必须的库文件

		bpp = screen->format->BitsPerPixel;
		bscreen.GetMode(&mode);
		if ( (bpp != ColorSpaceToBitsPerPixel(mode.space)) ||
		     (width != mode.virtual_width) ||
		     (height != mode.virtual_height)) {
			if(BE_FindClosestFSMode(_this, width, height, bpp, &mode)) {
				bscreen.SetMode(&mode);
				/* This simply stops the next resize event from being
				 * sent to the SDL handler.
				 */
				SDL_Win->InhibitResize();
			} else {
				fullscreen = 0;
				SDL_Win->SetFullScreen(fullscreen);
			}
		}
	}
	if ( was_fullscreen && ! fullscreen ) {
		bscreen.SetMode(&saved_mode);
	}

	if ( SDL_Win->Lock() ) {
		int cx, cy;
		if ( SDL_Win->Shown() ) {
			needs_unlock = 1;
			SDL_Win->Hide();
		} else {
			needs_unlock = 0;
		}
		/* This resizes the window and view area, but inhibits resizing
		 * of the BBitmap due to the InhibitResize call above. Thus the
		 * bitmap (pixel data) never changes.
		 */
		SDL_Win->ResizeTo(width, height);
		bounds = bscreen.Frame();
		/* Calculate offsets - used either to center window
		 * (windowed mode) or to set drawing offsets (fullscreen mode)
		 */
		cx = (bounds.IntegerWidth() - width)/2;
		cy = (bounds.IntegerHeight() - height)/2;

		if ( fullscreen ) {
			/* Set offset for drawing */
			SDL_Win->SetXYOffset(cx, cy);
		} else {
			SDL_Win->SetXYOffset(0, 0);
		}
		if ( ! needs_unlock || was_fullscreen ) {
			/* Center the window the first time */
			SDL_Win->MoveTo(cx, cy);
		}
		SDL_Win->Show();
		
		/* Unlock the window manually after the first Show() */
		if ( needs_unlock ) {
			SDL_Win->Unlock();
		}
	}

	/* Set the fullscreen flag in the screen surface */
	if ( fullscreen ) {
		screen->flags |= SDL_FULLSCREEN;
	} else {
		screen->flags &= ~SDL_FULLSCREEN; 
	}
	return(1);
}

static int BE_ToggleFullScreen(_THIS, int fullscreen)
{
	return BE_SetFullScreen(_this, _this->screen, fullscreen);
}

/* FIXME: check return values and cleanup here */
SDL_Surface *BE_SetVideoMode(_THIS, SDL_Surface *current,
				int width, int height, int bpp, Uint32 flags)
{
	BScreen bscreen;
	BBitmap *bbitmap;
	BRect bounds;
	Uint32 gl_flags = 0;

	/* Only RGB works on r5 currently */
	gl_flags = BGL_RGB;
	if (_this->gl_config.double_buffer)
		gl_flags |= BGL_DOUBLE;
	else
		gl_flags |= BGL_SINGLE;
	if (_this->gl_config.alpha_size > 0 || bpp == 32)
		gl_flags |= BGL_ALPHA;
	if (_this->gl_config.depth_size > 0)
		gl_flags |= BGL_DEPTH;
	if (_this->gl_config.stencil_size > 0)
		gl_flags |= BGL_STENCIL;
	if (_this->gl_config.accum_red_size > 0
		|| _this->gl_config.accum_green_size > 0
		|| _this->gl_config.accum_blue_size > 0
		|| _this->gl_config.accum_alpha_size > 0)
		gl_flags |= BGL_ACCUM;

	/* Create the view for this window, using found flags */
	if ( SDL_Win->CreateView(flags, gl_flags) < 0 ) {
		return(NULL);
	}

	current->flags = 0;		/* Clear flags */
	current->w = width;
	current->h = height;
	SDL_Win->SetType(B_TITLED_WINDOW);
	if ( flags & SDL_NOFRAME ) {
		current->flags |= SDL_NOFRAME;
		SDL_Win->SetLook(B_NO_BORDER_WINDOW_LOOK);
	} else {
		if ( (flags & SDL_RESIZABLE) && !(flags & SDL_OPENGL) )  {
			current->flags |= SDL_RESIZABLE;
			/* We don't want opaque resizing (TM). :-) */
			SDL_Win->SetFlags(B_OUTLINE_RESIZE);
		} else {
			SDL_Win->SetFlags(B_NOT_RESIZABLE|B_NOT_ZOOMABLE);
		}
	}

	if ( flags & SDL_OPENGL ) {
		current->flags |= SDL_OPENGL;
		current->pitch = 0;
		current->pixels = NULL;
		_this->UpdateRects = NULL;
	} else {
		/* Create the BBitmap framebuffer */
		bounds.top = 0; bounds.left = 0;
		bounds.right = width-1;
		bounds.bottom = height-1;
		bbitmap = new BBitmap(bounds, bscreen.ColorSpace());
		if ( ! bbitmap->IsValid() ) {
			SDL_SetError("Couldn't create screen bitmap");
			delete bbitmap;
			return(NULL);
		}
		current->pitch = bbitmap->BytesPerRow();
		current->pixels = (void *)bbitmap->Bits();
		SDL_Win->SetBitmap(bbitmap);
		_this->UpdateRects = BE_NormalUpdate;
	}

	/* Set the correct fullscreen mode */
	BE_SetFullScreen(_this, current, flags & SDL_FULLSCREEN ? 1 : 0);

	/* We're done */
	return(current);
}

/* Update the current mouse state and position */
void BE_UpdateMouse(_THIS)
{
	BPoint point;
	uint32 buttons;

	if ( SDL_Win->Lock() ) {
		/* Get new input state, if still active */
		if ( SDL_Win->IsActive() ) {
			(SDL_Win->View())->GetMouse(&point, &buttons, true);
		} else {
			point.x = -1;
			point.y = -1;
		}
		SDL_Win->Unlock();

		if ( (point.x >= 0) && (point.x < SDL_VideoSurface->w) &&
		     (point.y >= 0) && (point.y < SDL_VideoSurface->h) ) {
			SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
			SDL_PrivateMouseMotion(0, 0,
					(Sint16)point.x, (Sint16)point.y);
		} else {
			SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);
		}
	}
}

/* We don't actually allow hardware surfaces other than the main one */
static int BE_AllocHWSurface(_THIS, SDL_Surface *surface)
{
	return(-1);
}
static void BE_FreeHWSurface(_THIS, SDL_Surface *surface)
{
	return;
}
static int BE_LockHWSurface(_THIS, SDL_Surface *surface)
{
	return(0);
}
static void BE_UnlockHWSurface(_THIS, SDL_Surface *surface)
{
	return;
}

static void BE_NormalUpdate(_THIS, int numrects, SDL_Rect *rects)
{
	if ( SDL_Win->BeginDraw() ) {
		int i;

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

			rect.top = rects[i].y;
			rect.left = rects[i].x;
			rect.bottom = rect.top+rects[i].h-1;
			rect.right = rect.left+rects[i].w-1;
			SDL_Win->DrawAsync(rect);
		}
		SDL_Win->EndDraw();
	}
}

#if SDL_VIDEO_OPENGL
/* Passing a NULL path means load pointers from the application */
int BE_GL_LoadLibrary(_THIS, const char *path)
{
	if (path == NULL) {
		if (_this->gl_config.dll_handle == NULL) {
			image_info info;
			int32 cookie = 0;
			while (get_next_image_info(0,&cookie,&info) == B_OK) {
				void *location = NULL;
				if (get_image_symbol((image_id)cookie,"glBegin",B_SYMBOL_TYPE_ANY,&location) == B_OK) {
					_this->gl_config.dll_handle = (void*)cookie;
					_this->gl_config.driver_loaded = 1;
					SDL_strlcpy(_this->gl_config.driver_path, "libGL.so", SDL_arraysize(_this->gl_config.driver_path));
				}
			}
		}
	} else {
		/*
			FIXME None of BeOS libGL.so implementations have exported functions 
			to load BGLView, which should be reloaded from new lib.
			So for now just "load" linked libGL.so :(
		*/
		if (_this->gl_config.dll_handle == NULL) {
			return BE_GL_LoadLibrary(_this, NULL);
		}

		/* Unload old first */
		/*if (_this->gl_config.dll_handle != NULL) {*/
			/* Do not try to unload application itself (if LoadLibrary was called before with NULL ;) */
		/*	image_info info;
			if (get_image_info((image_id)_this->gl_config.dll_handle, &info) == B_OK) {
				if (info.type != B_APP_IMAGE) {
					unload_add_on((image_id)_this->gl_config.dll_handle);
				}
			}
			
		}

		if ((_this->gl_config.dll_handle = (void*)load_add_on(path)) != (void*)B_ERROR) {
			_this->gl_config.driver_loaded = 1;
			SDL_strlcpy(_this->gl_config.driver_path, path, SDL_arraysize(_this->gl_config.driver_path));
		}*/
	}

	if (_this->gl_config.dll_handle != NULL) {
		return 0;
	} else {
		_this->gl_config.dll_handle = NULL;
		_this->gl_config.driver_loaded = 0;
		*_this->gl_config.driver_path = '\0';
		return -1;
	}
}

void* BE_GL_GetProcAddress(_THIS, const char *proc)
{
	if (_this->gl_config.dll_handle != NULL) {
		void *location = NULL;
		status_t err;
		if ((err = get_image_symbol((image_id)_this->gl_config.dll_handle, proc, B_SYMBOL_TYPE_ANY, &location)) == B_OK) {
			return location;
		} else {
			SDL_SetError("Couldn't find OpenGL symbol");
			return NULL;
		}
	} else {
		SDL_SetError("OpenGL library not loaded");
		return NULL;
	}
}

int BE_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
{
	/*
		FIXME? Right now BE_GL_GetAttribute shouldn't be called between glBegin() and glEnd() - it doesn't use "cached" values
	*/
	switch (attrib)
    {
		case SDL_GL_RED_SIZE:
			glGetIntegerv(GL_RED_BITS, (GLint*)value);
			break;
		case SDL_GL_GREEN_SIZE:
			glGetIntegerv(GL_GREEN_BITS, (GLint*)value);
			break;
		case SDL_GL_BLUE_SIZE:
			glGetIntegerv(GL_BLUE_BITS, (GLint*)value);
			break;
		case SDL_GL_ALPHA_SIZE:
			glGetIntegerv(GL_ALPHA_BITS, (GLint*)value);
			break;
		case SDL_GL_DOUBLEBUFFER:
			glGetBooleanv(GL_DOUBLEBUFFER, (GLboolean*)value);
			break;
		case SDL_GL_BUFFER_SIZE:
			int v;
			glGetIntegerv(GL_RED_BITS, (GLint*)&v);
			*value = v;
			glGetIntegerv(GL_GREEN_BITS, (GLint*)&v);
			*value += v;
			glGetIntegerv(GL_BLUE_BITS, (GLint*)&v);
			*value += v;
			glGetIntegerv(GL_ALPHA_BITS, (GLint*)&v);
			*value += v;
			break;
		case SDL_GL_DEPTH_SIZE:
			glGetIntegerv(GL_DEPTH_BITS, (GLint*)value); /* Mesa creates 16 only? r5 always 32 */
			break;
		case SDL_GL_STENCIL_SIZE:
			glGetIntegerv(GL_STENCIL_BITS, (GLint*)value);
			break;
		case SDL_GL_ACCUM_RED_SIZE:
			glGetIntegerv(GL_ACCUM_RED_BITS, (GLint*)value);
			break;
		case SDL_GL_ACCUM_GREEN_SIZE:
			glGetIntegerv(GL_ACCUM_GREEN_BITS, (GLint*)value);
			break;
		case SDL_GL_ACCUM_BLUE_SIZE:
			glGetIntegerv(GL_ACCUM_BLUE_BITS, (GLint*)value);
			break;
		case SDL_GL_ACCUM_ALPHA_SIZE:
			glGetIntegerv(GL_ACCUM_ALPHA_BITS, (GLint*)value);
			break;
		case SDL_GL_STEREO:
		case SDL_GL_MULTISAMPLEBUFFERS:
		case SDL_GL_MULTISAMPLESAMPLES:
		default:
			*value=0;
			return(-1);
	}
	return 0;
}

int BE_GL_MakeCurrent(_THIS)
{
	/* FIXME: should we glview->unlock and then glview->lock()? */
	return 0;
}

void BE_GL_SwapBuffers(_THIS)
{
	SDL_Win->SwapBuffers();
}
#endif

/* Is the system palette settable? */
int BE_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
{
	int i;
	SDL_Palette *palette;
	const color_map *cmap = BScreen().ColorMap();

	/* Get the screen colormap */
	palette = _this->screen->format->palette;
	for ( i=0; i<256; ++i ) {
		palette->colors[i].r = cmap->color_list[i].red;
		palette->colors[i].g = cmap->color_list[i].green;
		palette->colors[i].b = cmap->color_list[i].blue;
	}
	return(0);
}

void BE_VideoQuit(_THIS)
{
	int i, j;

	SDL_Win->Quit();
	SDL_Win = NULL;

	if ( SDL_BlankCursor != NULL ) {
		BE_FreeWMCursor(_this, SDL_BlankCursor);
		SDL_BlankCursor = NULL;
	}
	for ( i=0; i<NUM_MODELISTS; ++i ) {
		if ( SDL_modelist[i] ) {
			for ( j=0; SDL_modelist[i][j]; ++j ) {
				SDL_free(SDL_modelist[i][j]);
			}
			SDL_free(SDL_modelist[i]);
			SDL_modelist[i] = NULL;
		}
	}
	/* Restore the original video mode */
	if ( _this->screen ) {
		if ( (_this->screen->flags&SDL_FULLSCREEN) == SDL_FULLSCREEN ) {
			BScreen bscreen;
			bscreen.SetMode(&saved_mode);
		}
		_this->screen->pixels = NULL;
	}

#if SDL_VIDEO_OPENGL
	if (_this->gl_config.dll_handle != NULL)
		unload_add_on((image_id)_this->gl_config.dll_handle);
#endif

	SDL_QuitBeApp();
}

}; /* Extern C */