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markom |
/*
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* tkImgBmap.c --
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*
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* This procedure implements images of type "bitmap" for Tk.
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*
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* Copyright (c) 1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tkImgBmap.c,v 1.1.1.1 2002-01-16 10:25:52 markom Exp $
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*/
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#include "tkInt.h"
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#include "tkPort.h"
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/*
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* The following data structure represents the master for a bitmap
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* image:
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*/
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typedef struct BitmapMaster {
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Tk_ImageMaster tkMaster; /* Tk's token for image master. NULL means
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* the image is being deleted. */
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Tcl_Interp *interp; /* Interpreter for application that is
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* using image. */
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Tcl_Command imageCmd; /* Token for image command (used to delete
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* it when the image goes away). NULL means
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* the image command has already been
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* deleted. */
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int width, height; /* Dimensions of image. */
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char *data; /* Data comprising bitmap (suitable for
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* input to XCreateBitmapFromData). May
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* be NULL if no data. Malloc'ed. */
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char *maskData; /* Data for bitmap's mask (suitable for
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* input to XCreateBitmapFromData).
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* Malloc'ed. */
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Tk_Uid fgUid; /* Value of -foreground option (malloc'ed). */
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Tk_Uid bgUid; /* Value of -background option (malloc'ed). */
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char *fileString; /* Value of -file option (malloc'ed). */
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char *dataString; /* Value of -data option (malloc'ed). */
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char *maskFileString; /* Value of -maskfile option (malloc'ed). */
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char *maskDataString; /* Value of -maskdata option (malloc'ed). */
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struct BitmapInstance *instancePtr;
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/* First in list of all instances associated
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* with this master. */
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} BitmapMaster;
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/*
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* The following data structure represents all of the instances of an
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* image that lie within a particular window:
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*/
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typedef struct BitmapInstance {
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int refCount; /* Number of instances that share this
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* data structure. */
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BitmapMaster *masterPtr; /* Pointer to master for image. */
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Tk_Window tkwin; /* Window in which the instances will be
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* displayed. */
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XColor *fg; /* Foreground color for displaying image. */
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XColor *bg; /* Background color for displaying image. */
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Pixmap bitmap; /* The bitmap to display. */
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Pixmap mask; /* Mask: only display bitmap pixels where
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* there are 1's here. */
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GC gc; /* Graphics context for displaying bitmap.
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* None means there was an error while
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* setting up the instance, so it cannot
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* be displayed. */
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struct BitmapInstance *nextPtr;
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/* Next in list of all instance structures
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* associated with masterPtr (NULL means
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* end of list). */
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} BitmapInstance;
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/*
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* The type record for bitmap images:
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*/
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static int GetByte _ANSI_ARGS_((Tcl_Channel chan));
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static int ImgBmapCreate _ANSI_ARGS_((Tcl_Interp *interp,
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char *name, int argc, Tcl_Obj *CONST objv[],
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Tk_ImageType *typePtr, Tk_ImageMaster master,
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ClientData *clientDataPtr));
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static ClientData ImgBmapGet _ANSI_ARGS_((Tk_Window tkwin,
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ClientData clientData));
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static void ImgBmapDisplay _ANSI_ARGS_((ClientData clientData,
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Display *display, Drawable drawable,
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int imageX, int imageY, int width, int height,
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int drawableX, int drawableY));
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static void ImgBmapFree _ANSI_ARGS_((ClientData clientData,
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Display *display));
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static void ImgBmapDelete _ANSI_ARGS_((ClientData clientData));
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Tk_ImageType tkBitmapImageType = {
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"bitmap", /* name */
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ImgBmapCreate, /* createProc */
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ImgBmapGet, /* getProc */
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ImgBmapDisplay, /* displayProc */
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ImgBmapFree, /* freeProc */
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ImgBmapDelete, /* deleteProc */
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(Tk_ImageType *) NULL /* nextPtr */
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};
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/*
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* Information used for parsing configuration specs:
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*/
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static Tk_ConfigSpec configSpecs[] = {
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{TK_CONFIG_UID, "-background", (char *) NULL, (char *) NULL,
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"", Tk_Offset(BitmapMaster, bgUid), 0},
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{TK_CONFIG_STRING, "-data", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(BitmapMaster, dataString), TK_CONFIG_NULL_OK},
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{TK_CONFIG_STRING, "-file", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(BitmapMaster, fileString), TK_CONFIG_NULL_OK},
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{TK_CONFIG_UID, "-foreground", (char *) NULL, (char *) NULL,
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"#000000", Tk_Offset(BitmapMaster, fgUid), 0},
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{TK_CONFIG_STRING, "-maskdata", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(BitmapMaster, maskDataString),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_STRING, "-maskfile", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(BitmapMaster, maskFileString),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
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(char *) NULL, 0, 0}
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};
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/*
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* The following data structure is used to describe the state of
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* parsing a bitmap file or string. It is used for communication
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* between TkGetBitmapData and NextBitmapWord.
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*/
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#define MAX_WORD_LENGTH 100
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typedef struct ParseInfo {
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char *string; /* Next character of string data for bitmap,
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* or NULL if bitmap is being read from
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* file. */
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Tcl_Channel chan; /* File containing bitmap data, or NULL
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* if no file. */
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char word[MAX_WORD_LENGTH+1];
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/* Current word of bitmap data, NULL
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* terminated. */
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int wordLength; /* Number of non-NULL bytes in word. */
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} ParseInfo;
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/*
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* Prototypes for procedures used only locally in this file:
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*/
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static int ImgBmapCmd _ANSI_ARGS_((ClientData clientData,
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Tcl_Interp *interp, int argc, char **argv));
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static void ImgBmapCmdDeletedProc _ANSI_ARGS_((
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ClientData clientData));
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static void ImgBmapConfigureInstance _ANSI_ARGS_((
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BitmapInstance *instancePtr));
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static int ImgBmapConfigureMaster _ANSI_ARGS_((
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BitmapMaster *masterPtr, int argc, char **argv,
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int flags));
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static int NextBitmapWord _ANSI_ARGS_((ParseInfo *parseInfoPtr));
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/*
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*----------------------------------------------------------------------
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*
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* ImgBmapCreate --
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*
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* This procedure is called by the Tk image code to create "test"
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* images.
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*
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* Results:
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* A standard Tcl result.
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*
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* Side effects:
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* The data structure for a new image is allocated.
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*
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*----------------------------------------------------------------------
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*/
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/* ARGSUSED */
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static int
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ImgBmapCreate(interp, name, argc, objv, typePtr, master, clientDataPtr)
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Tcl_Interp *interp; /* Interpreter for application containing
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* image. */
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char *name; /* Name to use for image. */
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int argc; /* Number of arguments. */
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Tcl_Obj *CONST objv[]; /* Argument objects for options (doesn't
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* include image name or type). */
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Tk_ImageType *typePtr; /* Pointer to our type record (not used). */
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Tk_ImageMaster master; /* Token for image, to be used by us in
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* later callbacks. */
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ClientData *clientDataPtr; /* Store manager's token for image here;
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* it will be returned in later callbacks. */
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{
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BitmapMaster *masterPtr;
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char **argv;
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int i;
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masterPtr = (BitmapMaster *) ckalloc(sizeof(BitmapMaster));
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masterPtr->tkMaster = master;
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masterPtr->interp = interp;
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masterPtr->imageCmd = Tcl_CreateCommand(interp, name, ImgBmapCmd,
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(ClientData) masterPtr, ImgBmapCmdDeletedProc);
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masterPtr->width = masterPtr->height = 0;
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masterPtr->data = NULL;
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masterPtr->maskData = NULL;
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masterPtr->fgUid = NULL;
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masterPtr->bgUid = NULL;
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masterPtr->fileString = NULL;
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masterPtr->dataString = NULL;
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masterPtr->maskFileString = NULL;
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masterPtr->maskDataString = NULL;
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masterPtr->instancePtr = NULL;
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/*
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* Convert the objv arguments into string equivalent.
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* A proper conversion to object format will need to be done in the future
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*/
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argv = (char **) ckalloc(argc * sizeof(char *));
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for (i = 0; i < argc; i++) {
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argv[i] = Tcl_GetStringFromObj(objv[i], NULL);
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}
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if (ImgBmapConfigureMaster(masterPtr, argc, argv, 0) != TCL_OK) {
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ImgBmapDelete((ClientData) masterPtr);
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ckfree((char *) argv);
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return TCL_ERROR;
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}
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ckfree((char *) argv);
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*clientDataPtr = (ClientData) masterPtr;
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return TCL_OK;
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}
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/*
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*----------------------------------------------------------------------
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*
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* ImgBmapConfigureMaster --
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*
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* This procedure is called when a bitmap image is created or
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* reconfigured. It process configuration options and resets
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* any instances of the image.
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*
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* Results:
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* A standard Tcl return value. If TCL_ERROR is returned then
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* an error message is left in masterPtr->interp->result.
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*
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* Side effects:
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* Existing instances of the image will be redisplayed to match
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* the new configuration options.
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*
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*----------------------------------------------------------------------
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*/
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static int
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ImgBmapConfigureMaster(masterPtr, argc, argv, flags)
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BitmapMaster *masterPtr; /* Pointer to data structure describing
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* overall bitmap image to (reconfigure). */
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int argc; /* Number of entries in argv. */
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char **argv; /* Pairs of configuration options for image. */
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int flags; /* Flags to pass to Tk_ConfigureWidget,
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* such as TK_CONFIG_ARGV_ONLY. */
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{
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BitmapInstance *instancePtr;
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int maskWidth, maskHeight, dummy1, dummy2;
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if (Tk_ConfigureWidget(masterPtr->interp, Tk_MainWindow(masterPtr->interp),
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configSpecs, argc, argv, (char *) masterPtr, flags)
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!= TCL_OK) {
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return TCL_ERROR;
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}
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/*
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* Parse the bitmap and/or mask to create binary data. Make sure that
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* the bitmap and mask have the same dimensions.
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*/
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if (masterPtr->data != NULL) {
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ckfree(masterPtr->data);
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masterPtr->data = NULL;
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}
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if ((masterPtr->fileString != NULL) || (masterPtr->dataString != NULL)) {
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masterPtr->data = TkGetBitmapData(masterPtr->interp,
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masterPtr->dataString, masterPtr->fileString,
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&masterPtr->width, &masterPtr->height, &dummy1, &dummy2);
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if (masterPtr->data == NULL) {
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return TCL_ERROR;
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}
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}
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if (masterPtr->maskData != NULL) {
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ckfree(masterPtr->maskData);
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masterPtr->maskData = NULL;
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}
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if ((masterPtr->maskFileString != NULL)
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|| (masterPtr->maskDataString != NULL)) {
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if (masterPtr->data == NULL) {
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masterPtr->interp->result = "can't have mask without bitmap";
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return TCL_ERROR;
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}
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masterPtr->maskData = TkGetBitmapData(masterPtr->interp,
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masterPtr->maskDataString, masterPtr->maskFileString,
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&maskWidth, &maskHeight, &dummy1, &dummy2);
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if (masterPtr->maskData == NULL) {
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return TCL_ERROR;
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}
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if ((maskWidth != masterPtr->width)
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|| (maskHeight != masterPtr->height)) {
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ckfree(masterPtr->maskData);
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masterPtr->maskData = NULL;
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masterPtr->interp->result = "bitmap and mask have different sizes";
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return TCL_ERROR;
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}
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}
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311 |
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/*
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313 |
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* Cycle through all of the instances of this image, regenerating
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* the information for each instance. Then force the image to be
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* redisplayed everywhere that it is used.
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*/
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for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
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instancePtr = instancePtr->nextPtr) {
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ImgBmapConfigureInstance(instancePtr);
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}
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Tk_ImageChanged(masterPtr->tkMaster, 0, 0, masterPtr->width,
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masterPtr->height, masterPtr->width, masterPtr->height);
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return TCL_OK;
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}
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/*
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328 |
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*----------------------------------------------------------------------
|
329 |
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*
|
330 |
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* ImgBmapConfigureInstance --
|
331 |
|
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*
|
332 |
|
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* This procedure is called to create displaying information for
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333 |
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* a bitmap image instance based on the configuration information
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334 |
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* in the master. It is invoked both when new instances are
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* created and when the master is reconfigured.
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*
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337 |
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* Results:
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* None.
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339 |
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*
|
340 |
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* Side effects:
|
341 |
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* Generates errors via Tcl_BackgroundError if there are problems
|
342 |
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* in setting up the instance.
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343 |
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*
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344 |
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*----------------------------------------------------------------------
|
345 |
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*/
|
346 |
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|
347 |
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|
static void
|
348 |
|
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ImgBmapConfigureInstance(instancePtr)
|
349 |
|
|
BitmapInstance *instancePtr; /* Instance to reconfigure. */
|
350 |
|
|
{
|
351 |
|
|
BitmapMaster *masterPtr = instancePtr->masterPtr;
|
352 |
|
|
XColor *colorPtr;
|
353 |
|
|
XGCValues gcValues;
|
354 |
|
|
GC gc;
|
355 |
|
|
unsigned int mask;
|
356 |
|
|
|
357 |
|
|
/*
|
358 |
|
|
* For each of the options in masterPtr, translate the string
|
359 |
|
|
* form into an internal form appropriate for instancePtr.
|
360 |
|
|
*/
|
361 |
|
|
|
362 |
|
|
if (*masterPtr->bgUid != 0) {
|
363 |
|
|
colorPtr = Tk_GetColor(masterPtr->interp, instancePtr->tkwin,
|
364 |
|
|
masterPtr->bgUid);
|
365 |
|
|
if (colorPtr == NULL) {
|
366 |
|
|
goto error;
|
367 |
|
|
}
|
368 |
|
|
} else {
|
369 |
|
|
colorPtr = NULL;
|
370 |
|
|
}
|
371 |
|
|
if (instancePtr->bg != NULL) {
|
372 |
|
|
Tk_FreeColor(instancePtr->bg);
|
373 |
|
|
}
|
374 |
|
|
instancePtr->bg = colorPtr;
|
375 |
|
|
|
376 |
|
|
colorPtr = Tk_GetColor(masterPtr->interp, instancePtr->tkwin,
|
377 |
|
|
masterPtr->fgUid);
|
378 |
|
|
if (colorPtr == NULL) {
|
379 |
|
|
goto error;
|
380 |
|
|
}
|
381 |
|
|
if (instancePtr->fg != NULL) {
|
382 |
|
|
Tk_FreeColor(instancePtr->fg);
|
383 |
|
|
}
|
384 |
|
|
instancePtr->fg = colorPtr;
|
385 |
|
|
|
386 |
|
|
if (instancePtr->bitmap != None) {
|
387 |
|
|
Tk_FreePixmap(Tk_Display(instancePtr->tkwin), instancePtr->bitmap);
|
388 |
|
|
instancePtr->bitmap = None;
|
389 |
|
|
}
|
390 |
|
|
if (masterPtr->data != NULL) {
|
391 |
|
|
instancePtr->bitmap = XCreateBitmapFromData(
|
392 |
|
|
Tk_Display(instancePtr->tkwin),
|
393 |
|
|
RootWindowOfScreen(Tk_Screen(instancePtr->tkwin)),
|
394 |
|
|
masterPtr->data, (unsigned) masterPtr->width,
|
395 |
|
|
(unsigned) masterPtr->height);
|
396 |
|
|
}
|
397 |
|
|
|
398 |
|
|
if (instancePtr->mask != None) {
|
399 |
|
|
Tk_FreePixmap(Tk_Display(instancePtr->tkwin), instancePtr->mask);
|
400 |
|
|
instancePtr->mask = None;
|
401 |
|
|
}
|
402 |
|
|
if (masterPtr->maskData != NULL) {
|
403 |
|
|
instancePtr->mask = XCreateBitmapFromData(
|
404 |
|
|
Tk_Display(instancePtr->tkwin),
|
405 |
|
|
RootWindowOfScreen(Tk_Screen(instancePtr->tkwin)),
|
406 |
|
|
masterPtr->maskData, (unsigned) masterPtr->width,
|
407 |
|
|
(unsigned) masterPtr->height);
|
408 |
|
|
}
|
409 |
|
|
|
410 |
|
|
if (masterPtr->data != NULL) {
|
411 |
|
|
gcValues.foreground = instancePtr->fg->pixel;
|
412 |
|
|
gcValues.graphics_exposures = False;
|
413 |
|
|
mask = GCForeground|GCGraphicsExposures;
|
414 |
|
|
if (instancePtr->bg != NULL) {
|
415 |
|
|
gcValues.background = instancePtr->bg->pixel;
|
416 |
|
|
mask |= GCBackground;
|
417 |
|
|
if (instancePtr->mask != None) {
|
418 |
|
|
gcValues.clip_mask = instancePtr->mask;
|
419 |
|
|
mask |= GCClipMask;
|
420 |
|
|
}
|
421 |
|
|
} else {
|
422 |
|
|
gcValues.clip_mask = instancePtr->bitmap;
|
423 |
|
|
mask |= GCClipMask;
|
424 |
|
|
}
|
425 |
|
|
gc = Tk_GetGCColor(instancePtr->tkwin, mask, &gcValues,
|
426 |
|
|
instancePtr->fg, instancePtr->bg);
|
427 |
|
|
} else {
|
428 |
|
|
gc = None;
|
429 |
|
|
}
|
430 |
|
|
if (instancePtr->gc != None) {
|
431 |
|
|
Tk_FreeGC(Tk_Display(instancePtr->tkwin), instancePtr->gc);
|
432 |
|
|
}
|
433 |
|
|
instancePtr->gc = gc;
|
434 |
|
|
return;
|
435 |
|
|
|
436 |
|
|
error:
|
437 |
|
|
/*
|
438 |
|
|
* An error occurred: clear the graphics context in the instance to
|
439 |
|
|
* make it clear that this instance cannot be displayed. Then report
|
440 |
|
|
* the error.
|
441 |
|
|
*/
|
442 |
|
|
|
443 |
|
|
if (instancePtr->gc != None) {
|
444 |
|
|
Tk_FreeGC(Tk_Display(instancePtr->tkwin), instancePtr->gc);
|
445 |
|
|
}
|
446 |
|
|
instancePtr->gc = None;
|
447 |
|
|
Tcl_AddErrorInfo(masterPtr->interp, "\n (while configuring image \"");
|
448 |
|
|
Tcl_AddErrorInfo(masterPtr->interp, Tk_NameOfImage(masterPtr->tkMaster));
|
449 |
|
|
Tcl_AddErrorInfo(masterPtr->interp, "\")");
|
450 |
|
|
Tcl_BackgroundError(masterPtr->interp);
|
451 |
|
|
}
|
452 |
|
|
|
453 |
|
|
/*
|
454 |
|
|
*----------------------------------------------------------------------
|
455 |
|
|
*
|
456 |
|
|
* TkGetBitmapData --
|
457 |
|
|
*
|
458 |
|
|
* Given a file name or ASCII string, this procedure parses the
|
459 |
|
|
* file or string contents to produce binary data for a bitmap.
|
460 |
|
|
*
|
461 |
|
|
* Results:
|
462 |
|
|
* If the bitmap description was parsed successfully then the
|
463 |
|
|
* return value is a malloc-ed array containing the bitmap data.
|
464 |
|
|
* The dimensions of the data are stored in *widthPtr and
|
465 |
|
|
* *heightPtr. *hotXPtr and *hotYPtr are set to the bitmap
|
466 |
|
|
* hotspot if one is defined, otherwise they are set to -1, -1.
|
467 |
|
|
* If an error occurred, NULL is returned and an error message is
|
468 |
|
|
* left in interp->result.
|
469 |
|
|
*
|
470 |
|
|
* Side effects:
|
471 |
|
|
* A bitmap is created.
|
472 |
|
|
*
|
473 |
|
|
*----------------------------------------------------------------------
|
474 |
|
|
*/
|
475 |
|
|
|
476 |
|
|
char *
|
477 |
|
|
TkGetBitmapData(interp, string, fileName, widthPtr, heightPtr,
|
478 |
|
|
hotXPtr, hotYPtr)
|
479 |
|
|
Tcl_Interp *interp; /* For reporting errors, or NULL. */
|
480 |
|
|
char *string; /* String describing bitmap. May
|
481 |
|
|
* be NULL. */
|
482 |
|
|
char *fileName; /* Name of file containing bitmap
|
483 |
|
|
* description. Used only if string
|
484 |
|
|
* is NULL. Must not be NULL if
|
485 |
|
|
* string is NULL. */
|
486 |
|
|
int *widthPtr, *heightPtr; /* Dimensions of bitmap get returned
|
487 |
|
|
* here. */
|
488 |
|
|
int *hotXPtr, *hotYPtr; /* Position of hot spot or -1,-1. */
|
489 |
|
|
{
|
490 |
|
|
int width, height, numBytes, hotX, hotY;
|
491 |
|
|
char *p, *end, *expandedFileName;
|
492 |
|
|
ParseInfo pi;
|
493 |
|
|
char *data = NULL;
|
494 |
|
|
Tcl_DString buffer;
|
495 |
|
|
|
496 |
|
|
pi.string = string;
|
497 |
|
|
if (string == NULL) {
|
498 |
|
|
if ((interp != NULL) && Tcl_IsSafe(interp)) {
|
499 |
|
|
Tcl_AppendResult(interp, "can't get bitmap data from a file in a",
|
500 |
|
|
" safe interpreter", (char *) NULL);
|
501 |
|
|
return NULL;
|
502 |
|
|
}
|
503 |
|
|
expandedFileName = Tcl_TranslateFileName(interp, fileName, &buffer);
|
504 |
|
|
if (expandedFileName == NULL) {
|
505 |
|
|
return NULL;
|
506 |
|
|
}
|
507 |
|
|
pi.chan = Tcl_OpenFileChannel(interp, expandedFileName, "r", 0);
|
508 |
|
|
Tcl_DStringFree(&buffer);
|
509 |
|
|
if (pi.chan == NULL) {
|
510 |
|
|
if (interp != NULL) {
|
511 |
|
|
Tcl_ResetResult(interp);
|
512 |
|
|
Tcl_AppendResult(interp, "couldn't read bitmap file \"",
|
513 |
|
|
fileName, "\": ", Tcl_PosixError(interp),
|
514 |
|
|
(char *) NULL);
|
515 |
|
|
}
|
516 |
|
|
return NULL;
|
517 |
|
|
}
|
518 |
|
|
} else {
|
519 |
|
|
pi.chan = NULL;
|
520 |
|
|
}
|
521 |
|
|
|
522 |
|
|
/*
|
523 |
|
|
* Parse the lines that define the dimensions of the bitmap,
|
524 |
|
|
* plus the first line that defines the bitmap data (it declares
|
525 |
|
|
* the name of a data variable but doesn't include any actual
|
526 |
|
|
* data). These lines look something like the following:
|
527 |
|
|
*
|
528 |
|
|
* #define foo_width 16
|
529 |
|
|
* #define foo_height 16
|
530 |
|
|
* #define foo_x_hot 3
|
531 |
|
|
* #define foo_y_hot 3
|
532 |
|
|
* static char foo_bits[] = {
|
533 |
|
|
*
|
534 |
|
|
* The x_hot and y_hot lines may or may not be present. It's
|
535 |
|
|
* important to check for "char" in the last line, in order to
|
536 |
|
|
* reject old X10-style bitmaps that used shorts.
|
537 |
|
|
*/
|
538 |
|
|
|
539 |
|
|
width = 0;
|
540 |
|
|
height = 0;
|
541 |
|
|
hotX = -1;
|
542 |
|
|
hotY = -1;
|
543 |
|
|
while (1) {
|
544 |
|
|
if (NextBitmapWord(&pi) != TCL_OK) {
|
545 |
|
|
goto error;
|
546 |
|
|
}
|
547 |
|
|
if ((pi.wordLength >= 6) && (pi.word[pi.wordLength-6] == '_')
|
548 |
|
|
&& (strcmp(pi.word+pi.wordLength-6, "_width") == 0)) {
|
549 |
|
|
if (NextBitmapWord(&pi) != TCL_OK) {
|
550 |
|
|
goto error;
|
551 |
|
|
}
|
552 |
|
|
width = strtol(pi.word, &end, 0);
|
553 |
|
|
if ((end == pi.word) || (*end != 0)) {
|
554 |
|
|
goto error;
|
555 |
|
|
}
|
556 |
|
|
} else if ((pi.wordLength >= 7) && (pi.word[pi.wordLength-7] == '_')
|
557 |
|
|
&& (strcmp(pi.word+pi.wordLength-7, "_height") == 0)) {
|
558 |
|
|
if (NextBitmapWord(&pi) != TCL_OK) {
|
559 |
|
|
goto error;
|
560 |
|
|
}
|
561 |
|
|
height = strtol(pi.word, &end, 0);
|
562 |
|
|
if ((end == pi.word) || (*end != 0)) {
|
563 |
|
|
goto error;
|
564 |
|
|
}
|
565 |
|
|
} else if ((pi.wordLength >= 6) && (pi.word[pi.wordLength-6] == '_')
|
566 |
|
|
&& (strcmp(pi.word+pi.wordLength-6, "_x_hot") == 0)) {
|
567 |
|
|
if (NextBitmapWord(&pi) != TCL_OK) {
|
568 |
|
|
goto error;
|
569 |
|
|
}
|
570 |
|
|
hotX = strtol(pi.word, &end, 0);
|
571 |
|
|
if ((end == pi.word) || (*end != 0)) {
|
572 |
|
|
goto error;
|
573 |
|
|
}
|
574 |
|
|
} else if ((pi.wordLength >= 6) && (pi.word[pi.wordLength-6] == '_')
|
575 |
|
|
&& (strcmp(pi.word+pi.wordLength-6, "_y_hot") == 0)) {
|
576 |
|
|
if (NextBitmapWord(&pi) != TCL_OK) {
|
577 |
|
|
goto error;
|
578 |
|
|
}
|
579 |
|
|
hotY = strtol(pi.word, &end, 0);
|
580 |
|
|
if ((end == pi.word) || (*end != 0)) {
|
581 |
|
|
goto error;
|
582 |
|
|
}
|
583 |
|
|
} else if ((pi.word[0] == 'c') && (strcmp(pi.word, "char") == 0)) {
|
584 |
|
|
while (1) {
|
585 |
|
|
if (NextBitmapWord(&pi) != TCL_OK) {
|
586 |
|
|
goto error;
|
587 |
|
|
}
|
588 |
|
|
if ((pi.word[0] == '{') && (pi.word[1] == 0)) {
|
589 |
|
|
goto getData;
|
590 |
|
|
}
|
591 |
|
|
}
|
592 |
|
|
} else if ((pi.word[0] == '{') && (pi.word[1] == 0)) {
|
593 |
|
|
if (interp != NULL) {
|
594 |
|
|
Tcl_AppendResult(interp, "format error in bitmap data; ",
|
595 |
|
|
"looks like it's an obsolete X10 bitmap file",
|
596 |
|
|
(char *) NULL);
|
597 |
|
|
}
|
598 |
|
|
goto errorCleanup;
|
599 |
|
|
}
|
600 |
|
|
}
|
601 |
|
|
|
602 |
|
|
/*
|
603 |
|
|
* Now we've read everything but the data. Allocate an array
|
604 |
|
|
* and read in the data.
|
605 |
|
|
*/
|
606 |
|
|
|
607 |
|
|
getData:
|
608 |
|
|
if ((width <= 0) || (height <= 0)) {
|
609 |
|
|
goto error;
|
610 |
|
|
}
|
611 |
|
|
numBytes = ((width+7)/8) * height;
|
612 |
|
|
data = (char *) ckalloc((unsigned) numBytes);
|
613 |
|
|
for (p = data; numBytes > 0; p++, numBytes--) {
|
614 |
|
|
if (NextBitmapWord(&pi) != TCL_OK) {
|
615 |
|
|
goto error;
|
616 |
|
|
}
|
617 |
|
|
*p = (char) strtol(pi.word, &end, 0);
|
618 |
|
|
if (end == pi.word) {
|
619 |
|
|
goto error;
|
620 |
|
|
}
|
621 |
|
|
}
|
622 |
|
|
|
623 |
|
|
/*
|
624 |
|
|
* All done. Clean up and return.
|
625 |
|
|
*/
|
626 |
|
|
|
627 |
|
|
if (pi.chan != NULL) {
|
628 |
|
|
Tcl_Close(NULL, pi.chan);
|
629 |
|
|
}
|
630 |
|
|
*widthPtr = width;
|
631 |
|
|
*heightPtr = height;
|
632 |
|
|
*hotXPtr = hotX;
|
633 |
|
|
*hotYPtr = hotY;
|
634 |
|
|
return data;
|
635 |
|
|
|
636 |
|
|
error:
|
637 |
|
|
if (interp != NULL) {
|
638 |
|
|
interp->result = "format error in bitmap data";
|
639 |
|
|
}
|
640 |
|
|
errorCleanup:
|
641 |
|
|
if (data != NULL) {
|
642 |
|
|
ckfree(data);
|
643 |
|
|
}
|
644 |
|
|
if (pi.chan != NULL) {
|
645 |
|
|
Tcl_Close(NULL, pi.chan);
|
646 |
|
|
}
|
647 |
|
|
return NULL;
|
648 |
|
|
}
|
649 |
|
|
|
650 |
|
|
/*
|
651 |
|
|
*----------------------------------------------------------------------
|
652 |
|
|
*
|
653 |
|
|
* NextBitmapWord --
|
654 |
|
|
*
|
655 |
|
|
* This procedure retrieves the next word of information (stuff
|
656 |
|
|
* between commas or white space) from a bitmap description.
|
657 |
|
|
*
|
658 |
|
|
* Results:
|
659 |
|
|
* Returns TCL_OK if all went well. In this case the next word,
|
660 |
|
|
* and its length, will be availble in *parseInfoPtr. If the end
|
661 |
|
|
* of the bitmap description was reached then TCL_ERROR is returned.
|
662 |
|
|
*
|
663 |
|
|
* Side effects:
|
664 |
|
|
* None.
|
665 |
|
|
*
|
666 |
|
|
*----------------------------------------------------------------------
|
667 |
|
|
*/
|
668 |
|
|
|
669 |
|
|
static int
|
670 |
|
|
NextBitmapWord(parseInfoPtr)
|
671 |
|
|
ParseInfo *parseInfoPtr; /* Describes what we're reading
|
672 |
|
|
* and where we are in it. */
|
673 |
|
|
{
|
674 |
|
|
char *src, *dst;
|
675 |
|
|
int c;
|
676 |
|
|
|
677 |
|
|
parseInfoPtr->wordLength = 0;
|
678 |
|
|
dst = parseInfoPtr->word;
|
679 |
|
|
if (parseInfoPtr->string != NULL) {
|
680 |
|
|
for (src = parseInfoPtr->string; isspace(UCHAR(*src)) || (*src == ',');
|
681 |
|
|
src++) {
|
682 |
|
|
if (*src == 0) {
|
683 |
|
|
return TCL_ERROR;
|
684 |
|
|
}
|
685 |
|
|
}
|
686 |
|
|
for ( ; !isspace(UCHAR(*src)) && (*src != ',') && (*src != 0); src++) {
|
687 |
|
|
*dst = *src;
|
688 |
|
|
dst++;
|
689 |
|
|
parseInfoPtr->wordLength++;
|
690 |
|
|
if (parseInfoPtr->wordLength > MAX_WORD_LENGTH) {
|
691 |
|
|
return TCL_ERROR;
|
692 |
|
|
}
|
693 |
|
|
}
|
694 |
|
|
parseInfoPtr->string = src;
|
695 |
|
|
} else {
|
696 |
|
|
for (c = GetByte(parseInfoPtr->chan); isspace(UCHAR(c)) || (c == ',');
|
697 |
|
|
c = GetByte(parseInfoPtr->chan)) {
|
698 |
|
|
if (c == EOF) {
|
699 |
|
|
return TCL_ERROR;
|
700 |
|
|
}
|
701 |
|
|
}
|
702 |
|
|
for ( ; !isspace(UCHAR(c)) && (c != ',') && (c != EOF);
|
703 |
|
|
c = GetByte(parseInfoPtr->chan)) {
|
704 |
|
|
*dst = c;
|
705 |
|
|
dst++;
|
706 |
|
|
parseInfoPtr->wordLength++;
|
707 |
|
|
if (parseInfoPtr->wordLength > MAX_WORD_LENGTH) {
|
708 |
|
|
return TCL_ERROR;
|
709 |
|
|
}
|
710 |
|
|
}
|
711 |
|
|
}
|
712 |
|
|
if (parseInfoPtr->wordLength == 0) {
|
713 |
|
|
return TCL_ERROR;
|
714 |
|
|
}
|
715 |
|
|
parseInfoPtr->word[parseInfoPtr->wordLength] = 0;
|
716 |
|
|
return TCL_OK;
|
717 |
|
|
}
|
718 |
|
|
|
719 |
|
|
/*
|
720 |
|
|
*--------------------------------------------------------------
|
721 |
|
|
*
|
722 |
|
|
* ImgBmapCmd --
|
723 |
|
|
*
|
724 |
|
|
* This procedure is invoked to process the Tcl command
|
725 |
|
|
* that corresponds to an image managed by this module.
|
726 |
|
|
* See the user documentation for details on what it does.
|
727 |
|
|
*
|
728 |
|
|
* Results:
|
729 |
|
|
* A standard Tcl result.
|
730 |
|
|
*
|
731 |
|
|
* Side effects:
|
732 |
|
|
* See the user documentation.
|
733 |
|
|
*
|
734 |
|
|
*--------------------------------------------------------------
|
735 |
|
|
*/
|
736 |
|
|
|
737 |
|
|
static int
|
738 |
|
|
ImgBmapCmd(clientData, interp, argc, argv)
|
739 |
|
|
ClientData clientData; /* Information about the image master. */
|
740 |
|
|
Tcl_Interp *interp; /* Current interpreter. */
|
741 |
|
|
int argc; /* Number of arguments. */
|
742 |
|
|
char **argv; /* Argument strings. */
|
743 |
|
|
{
|
744 |
|
|
BitmapMaster *masterPtr = (BitmapMaster *) clientData;
|
745 |
|
|
int c, code;
|
746 |
|
|
size_t length;
|
747 |
|
|
|
748 |
|
|
if (argc < 2) {
|
749 |
|
|
sprintf(interp->result,
|
750 |
|
|
"wrong # args: should be \"%.50s option ?arg arg ...?\"",
|
751 |
|
|
argv[0]);
|
752 |
|
|
return TCL_ERROR;
|
753 |
|
|
}
|
754 |
|
|
c = argv[1][0];
|
755 |
|
|
length = strlen(argv[1]);
|
756 |
|
|
if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
|
757 |
|
|
&& (length >= 2)) {
|
758 |
|
|
if (argc != 3) {
|
759 |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
760 |
|
|
argv[0], " cget option\"",
|
761 |
|
|
(char *) NULL);
|
762 |
|
|
return TCL_ERROR;
|
763 |
|
|
}
|
764 |
|
|
return Tk_ConfigureValue(interp, Tk_MainWindow(interp), configSpecs,
|
765 |
|
|
(char *) masterPtr, argv[2], 0);
|
766 |
|
|
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
|
767 |
|
|
&& (length >= 2)) {
|
768 |
|
|
if (argc == 2) {
|
769 |
|
|
code = Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
770 |
|
|
configSpecs, (char *) masterPtr, (char *) NULL, 0);
|
771 |
|
|
} else if (argc == 3) {
|
772 |
|
|
code = Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
773 |
|
|
configSpecs, (char *) masterPtr, argv[2], 0);
|
774 |
|
|
} else {
|
775 |
|
|
code = ImgBmapConfigureMaster(masterPtr, argc-2, argv+2,
|
776 |
|
|
TK_CONFIG_ARGV_ONLY);
|
777 |
|
|
}
|
778 |
|
|
return code;
|
779 |
|
|
} else {
|
780 |
|
|
Tcl_AppendResult(interp, "bad option \"", argv[1],
|
781 |
|
|
"\": must be cget or configure", (char *) NULL);
|
782 |
|
|
return TCL_ERROR;
|
783 |
|
|
}
|
784 |
|
|
}
|
785 |
|
|
|
786 |
|
|
/*
|
787 |
|
|
*----------------------------------------------------------------------
|
788 |
|
|
*
|
789 |
|
|
* ImgBmapGet --
|
790 |
|
|
*
|
791 |
|
|
* This procedure is called for each use of a bitmap image in a
|
792 |
|
|
* widget.
|
793 |
|
|
*
|
794 |
|
|
* Results:
|
795 |
|
|
* The return value is a token for the instance, which is passed
|
796 |
|
|
* back to us in calls to ImgBmapDisplay and ImgBmapFree.
|
797 |
|
|
*
|
798 |
|
|
* Side effects:
|
799 |
|
|
* A data structure is set up for the instance (or, an existing
|
800 |
|
|
* instance is re-used for the new one).
|
801 |
|
|
*
|
802 |
|
|
*----------------------------------------------------------------------
|
803 |
|
|
*/
|
804 |
|
|
|
805 |
|
|
static ClientData
|
806 |
|
|
ImgBmapGet(tkwin, masterData)
|
807 |
|
|
Tk_Window tkwin; /* Window in which the instance will be
|
808 |
|
|
* used. */
|
809 |
|
|
ClientData masterData; /* Pointer to our master structure for the
|
810 |
|
|
* image. */
|
811 |
|
|
{
|
812 |
|
|
BitmapMaster *masterPtr = (BitmapMaster *) masterData;
|
813 |
|
|
BitmapInstance *instancePtr;
|
814 |
|
|
|
815 |
|
|
/*
|
816 |
|
|
* See if there is already an instance for this window. If so
|
817 |
|
|
* then just re-use it.
|
818 |
|
|
*/
|
819 |
|
|
|
820 |
|
|
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
821 |
|
|
instancePtr = instancePtr->nextPtr) {
|
822 |
|
|
if (instancePtr->tkwin == tkwin) {
|
823 |
|
|
instancePtr->refCount++;
|
824 |
|
|
return (ClientData) instancePtr;
|
825 |
|
|
}
|
826 |
|
|
}
|
827 |
|
|
|
828 |
|
|
/*
|
829 |
|
|
* The image isn't already in use in this window. Make a new
|
830 |
|
|
* instance of the image.
|
831 |
|
|
*/
|
832 |
|
|
|
833 |
|
|
instancePtr = (BitmapInstance *) ckalloc(sizeof(BitmapInstance));
|
834 |
|
|
instancePtr->refCount = 1;
|
835 |
|
|
instancePtr->masterPtr = masterPtr;
|
836 |
|
|
instancePtr->tkwin = tkwin;
|
837 |
|
|
instancePtr->fg = NULL;
|
838 |
|
|
instancePtr->bg = NULL;
|
839 |
|
|
instancePtr->bitmap = None;
|
840 |
|
|
instancePtr->mask = None;
|
841 |
|
|
instancePtr->gc = None;
|
842 |
|
|
instancePtr->nextPtr = masterPtr->instancePtr;
|
843 |
|
|
masterPtr->instancePtr = instancePtr;
|
844 |
|
|
ImgBmapConfigureInstance(instancePtr);
|
845 |
|
|
|
846 |
|
|
/*
|
847 |
|
|
* If this is the first instance, must set the size of the image.
|
848 |
|
|
*/
|
849 |
|
|
|
850 |
|
|
if (instancePtr->nextPtr == NULL) {
|
851 |
|
|
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0, masterPtr->width,
|
852 |
|
|
masterPtr->height);
|
853 |
|
|
}
|
854 |
|
|
|
855 |
|
|
return (ClientData) instancePtr;
|
856 |
|
|
}
|
857 |
|
|
|
858 |
|
|
/*
|
859 |
|
|
*----------------------------------------------------------------------
|
860 |
|
|
*
|
861 |
|
|
* ImgBmapDisplay --
|
862 |
|
|
*
|
863 |
|
|
* This procedure is invoked to draw a bitmap image.
|
864 |
|
|
*
|
865 |
|
|
* Results:
|
866 |
|
|
* None.
|
867 |
|
|
*
|
868 |
|
|
* Side effects:
|
869 |
|
|
* A portion of the image gets rendered in a pixmap or window.
|
870 |
|
|
*
|
871 |
|
|
*----------------------------------------------------------------------
|
872 |
|
|
*/
|
873 |
|
|
|
874 |
|
|
static void
|
875 |
|
|
ImgBmapDisplay(clientData, display, drawable, imageX, imageY, width,
|
876 |
|
|
height, drawableX, drawableY)
|
877 |
|
|
ClientData clientData; /* Pointer to BitmapInstance structure for
|
878 |
|
|
* for instance to be displayed. */
|
879 |
|
|
Display *display; /* Display on which to draw image. */
|
880 |
|
|
Drawable drawable; /* Pixmap or window in which to draw image. */
|
881 |
|
|
int imageX, imageY; /* Upper-left corner of region within image
|
882 |
|
|
* to draw. */
|
883 |
|
|
int width, height; /* Dimensions of region within image to draw. */
|
884 |
|
|
int drawableX, drawableY; /* Coordinates within drawable that
|
885 |
|
|
* correspond to imageX and imageY. */
|
886 |
|
|
{
|
887 |
|
|
BitmapInstance *instancePtr = (BitmapInstance *) clientData;
|
888 |
|
|
int masking;
|
889 |
|
|
|
890 |
|
|
/*
|
891 |
|
|
* If there's no graphics context, it means that an error occurred
|
892 |
|
|
* while creating the image instance so it can't be displayed.
|
893 |
|
|
*/
|
894 |
|
|
|
895 |
|
|
if (instancePtr->gc == None) {
|
896 |
|
|
return;
|
897 |
|
|
}
|
898 |
|
|
|
899 |
|
|
/*
|
900 |
|
|
* If masking is in effect, must modify the mask origin within
|
901 |
|
|
* the graphics context to line up with the image's origin.
|
902 |
|
|
* Then draw the image and reset the clip origin, if there's
|
903 |
|
|
* a mask.
|
904 |
|
|
*/
|
905 |
|
|
|
906 |
|
|
masking = (instancePtr->mask != None) || (instancePtr->bg == NULL);
|
907 |
|
|
if (masking) {
|
908 |
|
|
XSetClipOrigin(display, instancePtr->gc, drawableX - imageX,
|
909 |
|
|
drawableY - imageY);
|
910 |
|
|
}
|
911 |
|
|
XCopyPlane(display, instancePtr->bitmap, drawable, instancePtr->gc,
|
912 |
|
|
imageX, imageY, (unsigned) width, (unsigned) height,
|
913 |
|
|
drawableX, drawableY, 1);
|
914 |
|
|
if (masking) {
|
915 |
|
|
XSetClipOrigin(display, instancePtr->gc, 0, 0);
|
916 |
|
|
}
|
917 |
|
|
}
|
918 |
|
|
|
919 |
|
|
/*
|
920 |
|
|
*----------------------------------------------------------------------
|
921 |
|
|
*
|
922 |
|
|
* ImgBmapFree --
|
923 |
|
|
*
|
924 |
|
|
* This procedure is called when a widget ceases to use a
|
925 |
|
|
* particular instance of an image.
|
926 |
|
|
*
|
927 |
|
|
* Results:
|
928 |
|
|
* None.
|
929 |
|
|
*
|
930 |
|
|
* Side effects:
|
931 |
|
|
* Internal data structures get cleaned up.
|
932 |
|
|
*
|
933 |
|
|
*----------------------------------------------------------------------
|
934 |
|
|
*/
|
935 |
|
|
|
936 |
|
|
static void
|
937 |
|
|
ImgBmapFree(clientData, display)
|
938 |
|
|
ClientData clientData; /* Pointer to BitmapInstance structure for
|
939 |
|
|
* for instance to be displayed. */
|
940 |
|
|
Display *display; /* Display containing window that used image. */
|
941 |
|
|
{
|
942 |
|
|
BitmapInstance *instancePtr = (BitmapInstance *) clientData;
|
943 |
|
|
BitmapInstance *prevPtr;
|
944 |
|
|
|
945 |
|
|
instancePtr->refCount--;
|
946 |
|
|
if (instancePtr->refCount > 0) {
|
947 |
|
|
return;
|
948 |
|
|
}
|
949 |
|
|
|
950 |
|
|
/*
|
951 |
|
|
* There are no more uses of the image within this widget. Free
|
952 |
|
|
* the instance structure.
|
953 |
|
|
*/
|
954 |
|
|
|
955 |
|
|
if (instancePtr->fg != NULL) {
|
956 |
|
|
Tk_FreeColor(instancePtr->fg);
|
957 |
|
|
}
|
958 |
|
|
if (instancePtr->bg != NULL) {
|
959 |
|
|
Tk_FreeColor(instancePtr->bg);
|
960 |
|
|
}
|
961 |
|
|
if (instancePtr->bitmap != None) {
|
962 |
|
|
Tk_FreePixmap(display, instancePtr->bitmap);
|
963 |
|
|
}
|
964 |
|
|
if (instancePtr->mask != None) {
|
965 |
|
|
Tk_FreePixmap(display, instancePtr->mask);
|
966 |
|
|
}
|
967 |
|
|
if (instancePtr->gc != None) {
|
968 |
|
|
Tk_FreeGC(display, instancePtr->gc);
|
969 |
|
|
}
|
970 |
|
|
if (instancePtr->masterPtr->instancePtr == instancePtr) {
|
971 |
|
|
instancePtr->masterPtr->instancePtr = instancePtr->nextPtr;
|
972 |
|
|
} else {
|
973 |
|
|
for (prevPtr = instancePtr->masterPtr->instancePtr;
|
974 |
|
|
prevPtr->nextPtr != instancePtr; prevPtr = prevPtr->nextPtr) {
|
975 |
|
|
/* Empty loop body */
|
976 |
|
|
}
|
977 |
|
|
prevPtr->nextPtr = instancePtr->nextPtr;
|
978 |
|
|
}
|
979 |
|
|
ckfree((char *) instancePtr);
|
980 |
|
|
}
|
981 |
|
|
|
982 |
|
|
/*
|
983 |
|
|
*----------------------------------------------------------------------
|
984 |
|
|
*
|
985 |
|
|
* ImgBmapDelete --
|
986 |
|
|
*
|
987 |
|
|
* This procedure is called by the image code to delete the
|
988 |
|
|
* master structure for an image.
|
989 |
|
|
*
|
990 |
|
|
* Results:
|
991 |
|
|
* None.
|
992 |
|
|
*
|
993 |
|
|
* Side effects:
|
994 |
|
|
* Resources associated with the image get freed.
|
995 |
|
|
*
|
996 |
|
|
*----------------------------------------------------------------------
|
997 |
|
|
*/
|
998 |
|
|
|
999 |
|
|
static void
|
1000 |
|
|
ImgBmapDelete(masterData)
|
1001 |
|
|
ClientData masterData; /* Pointer to BitmapMaster structure for
|
1002 |
|
|
* image. Must not have any more instances. */
|
1003 |
|
|
{
|
1004 |
|
|
BitmapMaster *masterPtr = (BitmapMaster *) masterData;
|
1005 |
|
|
|
1006 |
|
|
if (masterPtr->instancePtr != NULL) {
|
1007 |
|
|
panic("tried to delete bitmap image when instances still exist");
|
1008 |
|
|
}
|
1009 |
|
|
masterPtr->tkMaster = NULL;
|
1010 |
|
|
if (masterPtr->imageCmd != NULL) {
|
1011 |
|
|
Tcl_DeleteCommandFromToken(masterPtr->interp, masterPtr->imageCmd);
|
1012 |
|
|
}
|
1013 |
|
|
if (masterPtr->data != NULL) {
|
1014 |
|
|
ckfree(masterPtr->data);
|
1015 |
|
|
}
|
1016 |
|
|
if (masterPtr->maskData != NULL) {
|
1017 |
|
|
ckfree(masterPtr->maskData);
|
1018 |
|
|
}
|
1019 |
|
|
Tk_FreeOptions(configSpecs, (char *) masterPtr, (Display *) NULL, 0);
|
1020 |
|
|
ckfree((char *) masterPtr);
|
1021 |
|
|
}
|
1022 |
|
|
|
1023 |
|
|
/*
|
1024 |
|
|
*----------------------------------------------------------------------
|
1025 |
|
|
*
|
1026 |
|
|
* ImgBmapCmdDeletedProc --
|
1027 |
|
|
*
|
1028 |
|
|
* This procedure is invoked when the image command for an image
|
1029 |
|
|
* is deleted. It deletes the image.
|
1030 |
|
|
*
|
1031 |
|
|
* Results:
|
1032 |
|
|
* None.
|
1033 |
|
|
*
|
1034 |
|
|
* Side effects:
|
1035 |
|
|
* The image is deleted.
|
1036 |
|
|
*
|
1037 |
|
|
*----------------------------------------------------------------------
|
1038 |
|
|
*/
|
1039 |
|
|
|
1040 |
|
|
static void
|
1041 |
|
|
ImgBmapCmdDeletedProc(clientData)
|
1042 |
|
|
ClientData clientData; /* Pointer to BitmapMaster structure for
|
1043 |
|
|
* image. */
|
1044 |
|
|
{
|
1045 |
|
|
BitmapMaster *masterPtr = (BitmapMaster *) clientData;
|
1046 |
|
|
|
1047 |
|
|
masterPtr->imageCmd = NULL;
|
1048 |
|
|
if (masterPtr->tkMaster != NULL) {
|
1049 |
|
|
Tk_DeleteImage(masterPtr->interp, Tk_NameOfImage(masterPtr->tkMaster));
|
1050 |
|
|
}
|
1051 |
|
|
}
|
1052 |
|
|
|
1053 |
|
|
/*
|
1054 |
|
|
*----------------------------------------------------------------------
|
1055 |
|
|
*
|
1056 |
|
|
* GetByte --
|
1057 |
|
|
*
|
1058 |
|
|
* Get the next byte from the open channel.
|
1059 |
|
|
*
|
1060 |
|
|
* Results:
|
1061 |
|
|
* The next byte or EOF.
|
1062 |
|
|
*
|
1063 |
|
|
* Side effects:
|
1064 |
|
|
* We read from the channel.
|
1065 |
|
|
*
|
1066 |
|
|
*----------------------------------------------------------------------
|
1067 |
|
|
*/
|
1068 |
|
|
|
1069 |
|
|
static int
|
1070 |
|
|
GetByte(chan)
|
1071 |
|
|
Tcl_Channel chan; /* The channel we read from. */
|
1072 |
|
|
{
|
1073 |
|
|
char buffer;
|
1074 |
|
|
int size;
|
1075 |
|
|
|
1076 |
|
|
size = Tcl_Read(chan, &buffer, 1);
|
1077 |
|
|
if (size <= 0) {
|
1078 |
|
|
return EOF;
|
1079 |
|
|
} else {
|
1080 |
|
|
return buffer;
|
1081 |
|
|
}
|
1082 |
|
|
}
|