tkbitmap.c

linux系统下的音频通信

    predefPtr->width = width;
    predefPtr->height = height;
    predefPtr->native = 0;
    Tcl_SetHashValue(predefHashPtr, predefPtr);
    return TCL_OK;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_NameOfBitmap --
 *
 *	Given a bitmap, return a textual string identifying the
 *	bitmap.
 *
 * Results:
 *	The return value is the string name associated with bitmap.
 *
 * Side effects:
 *	None.
 *
 *--------------------------------------------------------------
 */

Tk_Uid
Tk_NameOfBitmap(display, bitmap)
    Display *display;			/* Display for which bitmap was
					 * allocated. */
    Pixmap bitmap;			/* Bitmap whose name is wanted. */
{
    IdKey idKey;
    Tcl_HashEntry *idHashPtr;
    TkBitmap *bitmapPtr;

    if (!initialized) {
	unknown:
	panic("Tk_NameOfBitmap received unknown bitmap argument");
    }

    idKey.display = display;
    idKey.pixmap = bitmap;
    idHashPtr = Tcl_FindHashEntry(&idTable, (char *) &idKey);
    if (idHashPtr == NULL) {
	goto unknown;
    }
    bitmapPtr = (TkBitmap *) Tcl_GetHashValue(idHashPtr);
    return ((NameKey *) bitmapPtr->hashPtr->key.words)->name;
}

/*
 *--------------------------------------------------------------
 *
 * Tk_SizeOfBitmap --
 *
 *	Given a bitmap managed by this module, returns the width
 *	and height of the bitmap.
 *
 * Results:
 *	The words at *widthPtr and *heightPtr are filled in with
 *	the dimenstions of bitmap.
 *
 * Side effects:
 *	If bitmap isn't managed by this module then the procedure
 *	panics..
 *
 *--------------------------------------------------------------
 */

void
Tk_SizeOfBitmap(display, bitmap, widthPtr, heightPtr)
    Display *display;			/* Display for which bitmap was
					 * allocated. */
    Pixmap bitmap;			/* Bitmap whose size is wanted. */
    int *widthPtr;			/* Store bitmap width here. */
    int *heightPtr;			/* Store bitmap height here. */
{
    IdKey idKey;
    Tcl_HashEntry *idHashPtr;
    TkBitmap *bitmapPtr;

    if (!initialized) {
	unknownBitmap:
	panic("Tk_SizeOfBitmap received unknown bitmap argument");
    }

    idKey.display = display;
    idKey.pixmap = bitmap;
    idHashPtr = Tcl_FindHashEntry(&idTable, (char *) &idKey);
    if (idHashPtr == NULL) {
	goto unknownBitmap;
    }
    bitmapPtr = (TkBitmap *) Tcl_GetHashValue(idHashPtr);
    *widthPtr = bitmapPtr->width;
    *heightPtr = bitmapPtr->height;
}

/*
 *----------------------------------------------------------------------
 *
 * Tk_FreeBitmap --
 *
 *	This procedure is called to release a bitmap allocated by
 *	Tk_GetBitmap or TkGetBitmapFromData.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The reference count associated with bitmap is decremented, and
 *	it is officially deallocated if no-one is using it anymore.
 *
 *----------------------------------------------------------------------
 */

void
Tk_FreeBitmap(display, bitmap)
    Display *display;			/* Display for which bitmap was
					 * allocated. */
    Pixmap bitmap;			/* Bitmap to be released. */
{
    Tcl_HashEntry *idHashPtr;
    register TkBitmap *bitmapPtr;
    IdKey idKey;

    if (!initialized) {
	panic("Tk_FreeBitmap called before Tk_GetBitmap");
    }

    idKey.display = display;
    idKey.pixmap = bitmap;
    idHashPtr = Tcl_FindHashEntry(&idTable, (char *) &idKey);
    if (idHashPtr == NULL) {
	panic("Tk_FreeBitmap received unknown bitmap argument");
    }
    bitmapPtr = (TkBitmap *) Tcl_GetHashValue(idHashPtr);
    bitmapPtr->refCount--;
    if (bitmapPtr->refCount == 0) {
	Tk_FreePixmap(bitmapPtr->display, bitmapPtr->bitmap);
	Tcl_DeleteHashEntry(idHashPtr);
	Tcl_DeleteHashEntry(bitmapPtr->hashPtr);
	ckfree((char *) bitmapPtr);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * Tk_GetBitmapFromData --
 *
 *	Given a description of the bits for a bitmap, make a bitmap that
 *	has the given properties. *** NOTE:  this procedure is obsolete
 *	and really shouldn't be used anymore. ***
 *
 * Results:
 *	The return value is the X identifer for the desired bitmap
 *	(a one-plane Pixmap), unless it couldn't be created properly.
 *	In this case, None is returned and an error message is left in
 *	interp->result.  The caller should never modify the bitmap that
 *	is returned, and should eventually call Tk_FreeBitmap when the
 *	bitmap is no longer needed.
 *
 * Side effects:
 *	The bitmap is added to an internal database with a reference count.
 *	For each call to this procedure, there should eventually be a call
 *	to Tk_FreeBitmap, so that the database can be cleaned up when bitmaps
 *	aren't needed anymore.
 *
 *----------------------------------------------------------------------
 */

	/* ARGSUSED */
Pixmap
Tk_GetBitmapFromData(interp, tkwin, source, width, height)
    Tcl_Interp *interp;		/* Interpreter to use for error reporting. */
    Tk_Window tkwin;		/* Window in which bitmap will be used. */
    char *source;		/* Bitmap data for bitmap shape. */
    int width, height;		/* Dimensions of bitmap. */
{
    DataKey nameKey;
    Tcl_HashEntry *dataHashPtr;
    Tk_Uid name;
    int new;
    char string[20];
    static int autoNumber = 0;

    if (!initialized) {
	BitmapInit();
    }

    nameKey.source = source;
    nameKey.width = width;
    nameKey.height = height;
    dataHashPtr = Tcl_CreateHashEntry(&dataTable, (char *) &nameKey, &new);
    if (!new) {
	name = (Tk_Uid) Tcl_GetHashValue(dataHashPtr);
    } else {
	autoNumber++;
	sprintf(string, "_tk%d", autoNumber);
	name = Tk_GetUid(string);
	Tcl_SetHashValue(dataHashPtr, name);
	if (Tk_DefineBitmap(interp, name, source, width, height) != TCL_OK) {
	    Tcl_DeleteHashEntry(dataHashPtr);
	    return TCL_ERROR;
	}
    }
    return Tk_GetBitmap(interp, tkwin, name);
}

/*
 *----------------------------------------------------------------------
 *
 * BitmapInit --
 *
 *	Initialize the structures used for bitmap management.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Read the code.
 *
 *----------------------------------------------------------------------
 */

static void
BitmapInit()
{
    Tcl_Interp *dummy;

    dummy = Tcl_CreateInterp();
    initialized = 1;
    Tcl_InitHashTable(&nameTable, sizeof(NameKey)/sizeof(int));
    Tcl_InitHashTable(&dataTable, sizeof(DataKey)/sizeof(int));
    Tcl_InitHashTable(&tkPredefBitmapTable, TCL_ONE_WORD_KEYS);

    /*
     * The call below is tricky:  can't use sizeof(IdKey) because it
     * gets padded with extra unpredictable bytes on some 64-bit
     * machines.
     */

    Tcl_InitHashTable(&idTable, (sizeof(Display *) + sizeof(Pixmap))
	    /sizeof(int));

    Tk_DefineBitmap(dummy, Tk_GetUid("error"), (char *) error_bits,
	    error_width, error_height);
    Tk_DefineBitmap(dummy, Tk_GetUid("gray75"), (char *) gray75_bits,
	    gray75_width, gray75_height);
    Tk_DefineBitmap(dummy, Tk_GetUid("gray50"), (char *) gray50_bits,
	    gray50_width, gray50_height);
    Tk_DefineBitmap(dummy, Tk_GetUid("gray25"), (char *) gray25_bits,
	    gray25_width, gray25_height);
    Tk_DefineBitmap(dummy, Tk_GetUid("gray12"), (char *) gray12_bits,
	    gray12_width, gray12_height);
    Tk_DefineBitmap(dummy, Tk_GetUid("hourglass"), (char *) hourglass_bits,
	    hourglass_width, hourglass_height);
    Tk_DefineBitmap(dummy, Tk_GetUid("info"), (char *) info_bits,
	    info_width, info_height);
    Tk_DefineBitmap(dummy, Tk_GetUid("questhead"), (char *) questhead_bits,
	    questhead_width, questhead_height);
    Tk_DefineBitmap(dummy, Tk_GetUid("question"), (char *) question_bits,
	    question_width, question_height);
    Tk_DefineBitmap(dummy, Tk_GetUid("warning"), (char *) warning_bits,
	    warning_width, warning_height);

    TkpDefineNativeBitmaps();

    Tcl_DeleteInterp(dummy);
}

/*
 *----------------------------------------------------------------------
 *
 * TkReadBitmapFile --
 *
 *	Loads a bitmap image in X bitmap format into the specified
 *	drawable.  This is equivelent to the XReadBitmapFile in X.
 *
 * Results:
 *	Sets the size, hotspot, and bitmap on success.
 *
 * Side effects:
 *	Creates a new bitmap from the file data.
 *
 *----------------------------------------------------------------------
 */

int
TkReadBitmapFile(display, d, filename, width_return, height_return,
	bitmap_return, x_hot_return, y_hot_return) 
    Display* display;
    Drawable d;
    CONST char* filename;
    unsigned int* width_return;
    unsigned int* height_return;
    Pixmap* bitmap_return;
    int* x_hot_return;
    int* y_hot_return;
{
    char *data;

    data = TkGetBitmapData(NULL, NULL, (char *) filename,
	    (int *) width_return, (int *) height_return, x_hot_return,
	    y_hot_return);
    if (data == NULL) {
	return BitmapFileInvalid;
    }

    *bitmap_return = XCreateBitmapFromData(display, d, data, *width_return,
	    *height_return);

    ckfree(data);
    return BitmapSuccess;
}