diff options
Diffstat (limited to 'generic/tkCanvImg.c')
| -rw-r--r-- | generic/tkCanvImg.c | 521 |
1 files changed, 256 insertions, 265 deletions
diff --git a/generic/tkCanvImg.c b/generic/tkCanvImg.c index eed7bb4..d4c4486 100644 --- a/generic/tkCanvImg.c +++ b/generic/tkCanvImg.c @@ -1,4 +1,4 @@ -/* +/* * tkCanvImg.c -- * * This file implements image items for canvas widgets. @@ -6,10 +6,10 @@ * Copyright (c) 1994 The Regents of the University of California. * Copyright (c) 1994-1997 Sun Microsystems, Inc. * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tkCanvImg.c,v 1.8 2004/11/17 22:17:11 hobbs Exp $ + * RCS: @(#) $Id: tkCanvImg.c,v 1.9 2005/11/04 15:23:05 dkf Exp $ */ #include <stdio.h> @@ -23,24 +23,24 @@ typedef struct ImageItem { Tk_Item header; /* Generic stuff that's the same for all - * types. MUST BE FIRST IN STRUCTURE. */ + * types. MUST BE FIRST IN STRUCTURE. */ Tk_Canvas canvas; /* Canvas containing the image. */ double x, y; /* Coordinates of positioning point for * image. */ - Tk_Anchor anchor; /* Where to anchor image relative to - * (x,y). */ - char *imageString; /* String describing -image option (malloc-ed). - * NULL means no image right now. */ + Tk_Anchor anchor; /* Where to anchor image relative to (x,y). */ + char *imageString; /* String describing -image option + * (malloc-ed). NULL means no image right + * now. */ char *activeImageString; /* String describing -activeimage option. * NULL means no image right now. */ char *disabledImageString; /* String describing -disabledimage option. * NULL means no image right now. */ - Tk_Image image; /* Image to display in window, or NULL if - * no image at present. */ - Tk_Image activeImage; /* Image to display in window, or NULL if - * no image at present. */ - Tk_Image disabledImage; /* Image to display in window, or NULL if - * no image at present. */ + Tk_Image image; /* Image to display in window, or NULL if no + * image at present. */ + Tk_Image activeImage; /* Image to display in window, or NULL if no + * image at present. */ + Tk_Image disabledImage; /* Image to display in window, or NULL if no + * image at present. */ } ImageItem; /* @@ -57,86 +57,81 @@ static Tk_CustomOption tagsOption = { }; static Tk_ConfigSpec configSpecs[] = { - {TK_CONFIG_STRING, "-activeimage", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(ImageItem, activeImageString), - TK_CONFIG_NULL_OK}, - {TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL, + {TK_CONFIG_STRING, "-activeimage", NULL, NULL, + NULL, Tk_Offset(ImageItem, activeImageString), TK_CONFIG_NULL_OK}, + {TK_CONFIG_ANCHOR, "-anchor", NULL, NULL, "center", Tk_Offset(ImageItem, anchor), TK_CONFIG_DONT_SET_DEFAULT}, - {TK_CONFIG_STRING, "-disabledimage", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(ImageItem, disabledImageString), - TK_CONFIG_NULL_OK}, - {TK_CONFIG_STRING, "-image", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(ImageItem, imageString), TK_CONFIG_NULL_OK}, - {TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL, - (char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, - &stateOption}, - {TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL, - (char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, - {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, - (char *) NULL, 0, 0} + {TK_CONFIG_STRING, "-disabledimage", NULL, NULL, + NULL, Tk_Offset(ImageItem, disabledImageString), TK_CONFIG_NULL_OK}, + {TK_CONFIG_STRING, "-image", NULL, NULL, + NULL, Tk_Offset(ImageItem, imageString), TK_CONFIG_NULL_OK}, + {TK_CONFIG_CUSTOM, "-state", NULL, NULL, + NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, &stateOption}, + {TK_CONFIG_CUSTOM, "-tags", NULL, NULL, + NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, + {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0} }; /* - * Prototypes for procedures defined in this file: + * Prototypes for functions defined in this file: */ -static void ImageChangedProc _ANSI_ARGS_((ClientData clientData, +static void ImageChangedProc(ClientData clientData, int x, int y, int width, int height, int imgWidth, - int imgHeight)); -static int ImageCoords _ANSI_ARGS_((Tcl_Interp *interp, + int imgHeight); +static int ImageCoords(Tcl_Interp *interp, Tk_Canvas canvas, Tk_Item *itemPtr, int argc, - Tcl_Obj *CONST argv[])); -static int ImageToArea _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, double *rectPtr)); -static double ImageToPoint _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, double *coordPtr)); -static int ImageToPostscript _ANSI_ARGS_((Tcl_Interp *interp, - Tk_Canvas canvas, Tk_Item *itemPtr, int prepass)); -static void ComputeImageBbox _ANSI_ARGS_((Tk_Canvas canvas, - ImageItem *imgPtr)); -static int ConfigureImage _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_Obj *CONST argv[]); +static int ImageToArea(Tk_Canvas canvas, + Tk_Item *itemPtr, double *rectPtr); +static double ImageToPoint(Tk_Canvas canvas, + Tk_Item *itemPtr, double *coordPtr); +static int ImageToPostscript(Tcl_Interp *interp, + Tk_Canvas canvas, Tk_Item *itemPtr, int prepass); +static void ComputeImageBbox(Tk_Canvas canvas, ImageItem *imgPtr); +static int ConfigureImage(Tcl_Interp *interp, Tk_Canvas canvas, Tk_Item *itemPtr, int argc, - Tcl_Obj *CONST argv[], int flags)); -static int CreateImage _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_Obj *CONST argv[], int flags); +static int CreateImage(Tcl_Interp *interp, Tk_Canvas canvas, struct Tk_Item *itemPtr, - int argc, Tcl_Obj *CONST argv[])); -static void DeleteImage _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, Display *display)); -static void DisplayImage _ANSI_ARGS_((Tk_Canvas canvas, + int argc, Tcl_Obj *CONST argv[]); +static void DeleteImage(Tk_Canvas canvas, + Tk_Item *itemPtr, Display *display); +static void DisplayImage(Tk_Canvas canvas, Tk_Item *itemPtr, Display *display, Drawable dst, - int x, int y, int width, int height)); -static void ScaleImage _ANSI_ARGS_((Tk_Canvas canvas, + int x, int y, int width, int height); +static void ScaleImage(Tk_Canvas canvas, Tk_Item *itemPtr, double originX, double originY, - double scaleX, double scaleY)); -static void TranslateImage _ANSI_ARGS_((Tk_Canvas canvas, - Tk_Item *itemPtr, double deltaX, double deltaY)); + double scaleX, double scaleY); +static void TranslateImage(Tk_Canvas canvas, + Tk_Item *itemPtr, double deltaX, double deltaY); /* - * The structures below defines the image item type in terms of - * procedures that can be invoked by generic item code. + * The structures below defines the image item type in terms of functions that + * can be invoked by generic item code. */ Tk_ItemType tkImageType = { - "image", /* name */ - sizeof(ImageItem), /* itemSize */ - CreateImage, /* createProc */ - configSpecs, /* configSpecs */ - ConfigureImage, /* configureProc */ - ImageCoords, /* coordProc */ - DeleteImage, /* deleteProc */ - DisplayImage, /* displayProc */ - TK_CONFIG_OBJS, /* flags */ - ImageToPoint, /* pointProc */ - ImageToArea, /* areaProc */ - ImageToPostscript, /* postscriptProc */ - ScaleImage, /* scaleProc */ - TranslateImage, /* translateProc */ - (Tk_ItemIndexProc *) NULL, /* indexProc */ - (Tk_ItemCursorProc *) NULL, /* icursorProc */ - (Tk_ItemSelectionProc *) NULL, /* selectionProc */ - (Tk_ItemInsertProc *) NULL, /* insertProc */ - (Tk_ItemDCharsProc *) NULL, /* dTextProc */ - (Tk_ItemType *) NULL, /* nextPtr */ + "image", /* name */ + sizeof(ImageItem), /* itemSize */ + CreateImage, /* createProc */ + configSpecs, /* configSpecs */ + ConfigureImage, /* configureProc */ + ImageCoords, /* coordProc */ + DeleteImage, /* deleteProc */ + DisplayImage, /* displayProc */ + TK_CONFIG_OBJS, /* flags */ + ImageToPoint, /* pointProc */ + ImageToArea, /* areaProc */ + ImageToPostscript, /* postscriptProc */ + ScaleImage, /* scaleProc */ + TranslateImage, /* translateProc */ + NULL, /* indexProc */ + NULL, /* icursorProc */ + NULL, /* selectionProc */ + NULL, /* insertProc */ + NULL, /* dTextProc */ + NULL, /* nextPtr */ }; /* @@ -144,14 +139,13 @@ Tk_ItemType tkImageType = { * * CreateImage -- * - * This procedure is invoked to create a new image - * item in a canvas. + * This function is invoked to create a new image item in a canvas. * * Results: - * A standard Tcl return value. If an error occurred in - * creating the item, then an error message is left in - * the interp's result; in this case itemPtr is left uninitialized, - * so it can be safely freed by the caller. + * A standard Tcl return value. If an error occurred in creating the + * item, then an error message is left in the interp's result; in this + * case itemPtr is left uninitialized, so it can be safely freed by the + * caller. * * Side effects: * A new image item is created. @@ -160,13 +154,13 @@ Tk_ItemType tkImageType = { */ static int -CreateImage(interp, canvas, itemPtr, objc, objv) - Tcl_Interp *interp; /* Interpreter for error reporting. */ - Tk_Canvas canvas; /* Canvas to hold new item. */ - Tk_Item *itemPtr; /* Record to hold new item; header - * has been initialized by caller. */ - int objc; /* Number of arguments in objv. */ - Tcl_Obj *CONST objv[]; /* Arguments describing rectangle. */ +CreateImage( + Tcl_Interp *interp, /* Interpreter for error reporting. */ + Tk_Canvas canvas, /* Canvas to hold new item. */ + Tk_Item *itemPtr, /* Record to hold new item; header has been + * initialized by caller. */ + int objc, /* Number of arguments in objv. */ + Tcl_Obj *CONST objv[]) /* Arguments describing rectangle. */ { ImageItem *imgPtr = (ImageItem *) itemPtr; int i; @@ -189,8 +183,8 @@ CreateImage(interp, canvas, itemPtr, objc, objv) imgPtr->disabledImage = NULL; /* - * Process the arguments to fill in the item record. - * Only 1 (list) or 2 (x y) coords are allowed. + * Process the arguments to fill in the item record. Only 1 (list) or 2 (x + * y) coords are allowed. */ if (objc == 1) { @@ -209,7 +203,7 @@ CreateImage(interp, canvas, itemPtr, objc, objv) return TCL_OK; } - error: + error: DeleteImage(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); return TCL_ERROR; } @@ -219,9 +213,8 @@ CreateImage(interp, canvas, itemPtr, objc, objv) * * ImageCoords -- * - * This procedure is invoked to process the "coords" widget - * command on image items. See the user documentation for - * details on what it does. + * This function is invoked to process the "coords" widget command on + * image items. See the user documentation for details on what it does. * * Results: * Returns TCL_OK or TCL_ERROR, and sets the interp's result. @@ -233,20 +226,19 @@ CreateImage(interp, canvas, itemPtr, objc, objv) */ static int -ImageCoords(interp, canvas, itemPtr, objc, objv) - Tcl_Interp *interp; /* Used for error reporting. */ - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item whose coordinates are to be - * read or modified. */ - int objc; /* Number of coordinates supplied in - * objv. */ - Tcl_Obj *CONST objv[]; /* Array of coordinates: x1, y1, - * x2, y2, ... */ +ImageCoords( + Tcl_Interp *interp, /* Used for error reporting. */ + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item whose coordinates are to be read or + * modified. */ + int objc, /* Number of coordinates supplied in objv. */ + Tcl_Obj *CONST objv[]) /* Array of coordinates: x1, y1, x2, y2, ... */ { ImageItem *imgPtr = (ImageItem *) itemPtr; if (objc == 0) { Tcl_Obj *obj = Tcl_NewObj(); + Tcl_Obj *subobj = Tcl_NewDoubleObj(imgPtr->x); Tcl_ListObjAppendElement(interp, obj, subobj); subobj = Tcl_NewDoubleObj(imgPtr->y); @@ -273,7 +265,7 @@ ImageCoords(interp, canvas, itemPtr, objc, objv) ComputeImageBbox(canvas, imgPtr); } else { char buf[64]; - + sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", objc); Tcl_SetResult(interp, buf, TCL_VOLATILE); return TCL_ERROR; @@ -286,12 +278,12 @@ ImageCoords(interp, canvas, itemPtr, objc, objv) * * ConfigureImage -- * - * This procedure is invoked to configure various aspects - * of an image item, such as its anchor position. + * This function is invoked to configure various aspects of an image + * item, such as its anchor position. * * Results: - * A standard Tcl result code. If an error occurs, then - * an error message is left in the interp's result. + * A standard Tcl result code. If an error occurs, then an error message + * is left in the interp's result. * * Side effects: * Configuration information may be set for itemPtr. @@ -300,13 +292,13 @@ ImageCoords(interp, canvas, itemPtr, objc, objv) */ static int -ConfigureImage(interp, canvas, itemPtr, objc, objv, flags) - Tcl_Interp *interp; /* Used for error reporting. */ - Tk_Canvas canvas; /* Canvas containing itemPtr. */ - Tk_Item *itemPtr; /* Image item to reconfigure. */ - int objc; /* Number of elements in objv. */ - Tcl_Obj *CONST objv[]; /* Arguments describing things to configure. */ - int flags; /* Flags to pass to Tk_ConfigureWidget. */ +ConfigureImage( + Tcl_Interp *interp, /* Used for error reporting. */ + Tk_Canvas canvas, /* Canvas containing itemPtr. */ + Tk_Item *itemPtr, /* Image item to reconfigure. */ + int objc, /* Number of elements in objv. */ + Tcl_Obj *CONST objv[], /* Arguments describing things to configure. */ + int flags) /* Flags to pass to Tk_ConfigureWidget. */ { ImageItem *imgPtr = (ImageItem *) itemPtr; Tk_Window tkwin; @@ -319,10 +311,10 @@ ConfigureImage(interp, canvas, itemPtr, objc, objv, flags) } /* - * Create the image. Save the old image around and don't free it - * until after the new one is allocated. This keeps the reference - * count from going to zero so the image doesn't have to be recreated - * if it hasn't changed. + * Create the image. Save the old image around and don't free it until + * after the new one is allocated. This keeps the reference count from + * going to zero so the image doesn't have to be recreated if it hasn't + * changed. */ if (imgPtr->activeImageString != NULL) { @@ -378,8 +370,8 @@ ConfigureImage(interp, canvas, itemPtr, objc, objv, flags) * * DeleteImage -- * - * This procedure is called to clean up the data structure - * associated with a image item. + * This function is called to clean up the data structure associated with + * a image item. * * Results: * None. @@ -391,11 +383,10 @@ ConfigureImage(interp, canvas, itemPtr, objc, objv, flags) */ static void -DeleteImage(canvas, itemPtr, display) - Tk_Canvas canvas; /* Info about overall canvas widget. */ - Tk_Item *itemPtr; /* Item that is being deleted. */ - Display *display; /* Display containing window for - * canvas. */ +DeleteImage( + Tk_Canvas canvas, /* Info about overall canvas widget. */ + Tk_Item *itemPtr, /* Item that is being deleted. */ + Display *display) /* Display containing window for canvas. */ { ImageItem *imgPtr = (ImageItem *) itemPtr; @@ -424,27 +415,24 @@ DeleteImage(canvas, itemPtr, display) * * ComputeImageBbox -- * - * This procedure is invoked to compute the bounding box of - * all the pixels that may be drawn as part of a image item. - * This procedure is where the child image's placement is - * computed. + * This function is invoked to compute the bounding box of all the pixels + * that may be drawn as part of a image item. This function is where the + * child image's placement is computed. * * Results: * None. * * Side effects: - * The fields x1, y1, x2, and y2 are updated in the header - * for itemPtr. + * The fields x1, y1, x2, and y2 are updated in the header for itemPtr. * *-------------------------------------------------------------- */ /* ARGSUSED */ static void -ComputeImageBbox(canvas, imgPtr) - Tk_Canvas canvas; /* Canvas that contains item. */ - ImageItem *imgPtr; /* Item whose bbox is to be - * recomputed. */ +ComputeImageBbox( + Tk_Canvas canvas, /* Canvas that contains item. */ + ImageItem *imgPtr) /* Item whose bbox is to be recomputed. */ { int width, height; int x, y; @@ -480,36 +468,36 @@ ComputeImageBbox(canvas, imgPtr) Tk_SizeOfImage(image, &width, &height); switch (imgPtr->anchor) { - case TK_ANCHOR_N: - x -= width/2; - break; - case TK_ANCHOR_NE: - x -= width; - break; - case TK_ANCHOR_E: - x -= width; - y -= height/2; - break; - case TK_ANCHOR_SE: - x -= width; - y -= height; - break; - case TK_ANCHOR_S: - x -= width/2; - y -= height; - break; - case TK_ANCHOR_SW: - y -= height; - break; - case TK_ANCHOR_W: - y -= height/2; - break; - case TK_ANCHOR_NW: - break; - case TK_ANCHOR_CENTER: - x -= width/2; - y -= height/2; - break; + case TK_ANCHOR_N: + x -= width/2; + break; + case TK_ANCHOR_NE: + x -= width; + break; + case TK_ANCHOR_E: + x -= width; + y -= height/2; + break; + case TK_ANCHOR_SE: + x -= width; + y -= height; + break; + case TK_ANCHOR_S: + x -= width/2; + y -= height; + break; + case TK_ANCHOR_SW: + y -= height; + break; + case TK_ANCHOR_W: + y -= height/2; + break; + case TK_ANCHOR_NW: + break; + case TK_ANCHOR_CENTER: + x -= width/2; + y -= height/2; + break; } /* @@ -527,35 +515,34 @@ ComputeImageBbox(canvas, imgPtr) * * DisplayImage -- * - * This procedure is invoked to draw a image item in a given - * drawable. + * This function is invoked to draw a image item in a given drawable. * * Results: * None. * * Side effects: - * ItemPtr is drawn in drawable using the transformation - * information in canvas. + * ItemPtr is drawn in drawable using the transformation information in + * canvas. * *-------------------------------------------------------------- */ static void -DisplayImage(canvas, itemPtr, display, drawable, x, y, width, height) - Tk_Canvas canvas; /* Canvas that contains item. */ - Tk_Item *itemPtr; /* Item to be displayed. */ - Display *display; /* Display on which to draw item. */ - Drawable drawable; /* Pixmap or window in which to draw - * item. */ - int x, y, width, height; /* Describes region of canvas that - * must be redisplayed (not used). */ +DisplayImage( + Tk_Canvas canvas, /* Canvas that contains item. */ + Tk_Item *itemPtr, /* Item to be displayed. */ + Display *display, /* Display on which to draw item. */ + Drawable drawable, /* Pixmap or window in which to draw item. */ + int x, int y, int width, int height) + /* Describes region of canvas that must be + * redisplayed (not used). */ { ImageItem *imgPtr = (ImageItem *) itemPtr; short drawableX, drawableY; Tk_Image image; Tk_State state = itemPtr->state; - if(state == TK_STATE_NULL) { + if (state == TK_STATE_NULL) { state = ((TkCanvas *)canvas)->canvas_state; } @@ -589,14 +576,14 @@ DisplayImage(canvas, itemPtr, display, drawable, x, y, width, height) * * ImageToPoint -- * - * Computes the distance from a given point to a given - * rectangle, in canvas units. + * Computes the distance from a given point to a given rectangle, in + * canvas units. * * Results: - * The return value is 0 if the point whose x and y coordinates - * are coordPtr[0] and coordPtr[1] is inside the image. If the - * point isn't inside the image then the return value is the - * distance from the point to the image. + * The return value is 0 if the point whose x and y coordinates are + * coordPtr[0] and coordPtr[1] is inside the image. If the point isn't + * inside the image then the return value is the distance from the point + * to the image. * * Side effects: * None. @@ -605,10 +592,10 @@ DisplayImage(canvas, itemPtr, display, drawable, x, y, width, height) */ static double -ImageToPoint(canvas, itemPtr, coordPtr) - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item to check against point. */ - double *coordPtr; /* Pointer to x and y coordinates. */ +ImageToPoint( + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item to check against point. */ + double *coordPtr) /* Pointer to x and y coordinates. */ { ImageItem *imgPtr = (ImageItem *) itemPtr; double x1, x2, y1, y2, xDiff, yDiff; @@ -646,14 +633,13 @@ ImageToPoint(canvas, itemPtr, coordPtr) * * ImageToArea -- * - * This procedure is called to determine whether an item - * lies entirely inside, entirely outside, or overlapping - * a given rectangle. + * This function is called to determine whether an item lies entirely + * inside, entirely outside, or overlapping a given rectangle. * * Results: - * -1 is returned if the item is entirely outside the area - * given by rectPtr, 0 if it overlaps, and 1 if it is entirely - * inside the given area. + * -1 is returned if the item is entirely outside the area given by + * rectPtr, 0 if it overlaps, and 1 if it is entirely inside the given + * area. * * Side effects: * None. @@ -662,12 +648,12 @@ ImageToPoint(canvas, itemPtr, coordPtr) */ static int -ImageToArea(canvas, itemPtr, rectPtr) - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item to check against rectangle. */ - double *rectPtr; /* Pointer to array of four coordinates - * (x1, y1, x2, y2) describing rectangular - * area. */ +ImageToArea( + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item to check against rectangle. */ + double *rectPtr) /* Pointer to array of four coordinates + * (x1,y1,x2,y2) describing rectangular + * area. */ { ImageItem *imgPtr = (ImageItem *) itemPtr; @@ -691,15 +677,13 @@ ImageToArea(canvas, itemPtr, rectPtr) * * ImageToPostscript -- * - * This procedure is called to generate Postscript for - * image items. + * This function is called to generate Postscript for image items. * * Results: - * The return value is a standard Tcl result. If an error - * occurs in generating Postscript then an error message is - * left in interp->result, replacing whatever used to be there. - * If no error occurs, then Postscript for the item is appended - * to the result. + * The return value is a standard Tcl result. If an error occurs in + * generating Postscript then an error message is left in interp->result, + * replacing whatever used to be there. If no error occurs, then + * Postscript for the item is appended to the result. * * Side effects: * None. @@ -708,15 +692,13 @@ ImageToArea(canvas, itemPtr, rectPtr) */ static int -ImageToPostscript(interp, canvas, itemPtr, prepass) - Tcl_Interp *interp; /* Leave Postscript or error message - * here. */ - Tk_Canvas canvas; /* Information about overall canvas. */ - Tk_Item *itemPtr; /* Item for which Postscript is - * wanted. */ - int prepass; /* 1 means this is a prepass to - * collect font information; 0 means - * final Postscript is being created.*/ +ImageToPostscript( + Tcl_Interp *interp, /* Leave Postscript or error message here. */ + Tk_Canvas canvas, /* Information about overall canvas. */ + Tk_Item *itemPtr, /* Item for which Postscript is wanted. */ + int prepass) /* 1 means this is a prepass to collect font + * information; 0 means final Postscript is + * being created.*/ { ImageItem *imgPtr = (ImageItem *)itemPtr; Tk_Window canvasWin = Tk_CanvasTkwin(canvas); @@ -745,33 +727,34 @@ ImageToPostscript(interp, canvas, itemPtr, prepass) /* * Image item without actual image specified. */ + return TCL_OK; } Tk_SizeOfImage(image, &width, &height); /* - * Compute the coordinates of the lower-left corner of the image, - * taking into account the anchor position for the image. + * Compute the coordinates of the lower-left corner of the image, taking + * into account the anchor position for the image. */ x = imgPtr->x; y = Tk_CanvasPsY(canvas, imgPtr->y); switch (imgPtr->anchor) { - case TK_ANCHOR_NW: y -= height; break; - case TK_ANCHOR_N: x -= width/2.0; y -= height; break; - case TK_ANCHOR_NE: x -= width; y -= height; break; - case TK_ANCHOR_E: x -= width; y -= height/2.0; break; - case TK_ANCHOR_SE: x -= width; break; - case TK_ANCHOR_S: x -= width/2.0; break; - case TK_ANCHOR_SW: break; - case TK_ANCHOR_W: y -= height/2.0; break; - case TK_ANCHOR_CENTER: x -= width/2.0; y -= height/2.0; break; + case TK_ANCHOR_NW: y -= height; break; + case TK_ANCHOR_N: x -= width/2.0; y -= height; break; + case TK_ANCHOR_NE: x -= width; y -= height; break; + case TK_ANCHOR_E: x -= width; y -= height/2.0; break; + case TK_ANCHOR_SE: x -= width; break; + case TK_ANCHOR_S: x -= width/2.0; break; + case TK_ANCHOR_SW: break; + case TK_ANCHOR_W: y -= height/2.0; break; + case TK_ANCHOR_CENTER: x -= width/2.0; y -= height/2.0; break; } if (!prepass) { sprintf(buffer, "%.15g %.15g", x, y); - Tcl_AppendResult(interp, buffer, " translate\n", (char *) NULL); + Tcl_AppendResult(interp, buffer, " translate\n", NULL); } return Tk_PostscriptImage(image, interp, canvasWin, @@ -783,14 +766,14 @@ ImageToPostscript(interp, canvas, itemPtr, prepass) * * ScaleImage -- * - * This procedure is invoked to rescale an item. + * This function is invoked to rescale an item. * * Results: * None. * * Side effects: - * The item referred to by itemPtr is rescaled so that the - * following transformation is applied to all point coordinates: + * The item referred to by itemPtr is rescaled so that the following + * transformation is applied to all point coordinates: * x' = originX + scaleX*(x-originX) * y' = originY + scaleY*(y-originY) * @@ -798,12 +781,13 @@ ImageToPostscript(interp, canvas, itemPtr, prepass) */ static void -ScaleImage(canvas, itemPtr, originX, originY, scaleX, scaleY) - Tk_Canvas canvas; /* Canvas containing rectangle. */ - Tk_Item *itemPtr; /* Rectangle to be scaled. */ - double originX, originY; /* Origin about which to scale rect. */ - double scaleX; /* Amount to scale in X direction. */ - double scaleY; /* Amount to scale in Y direction. */ +ScaleImage( + Tk_Canvas canvas, /* Canvas containing rectangle. */ + Tk_Item *itemPtr, /* Rectangle to be scaled. */ + double originX, double originY, + /* Origin about which to scale rect. */ + double scaleX, /* Amount to scale in X direction. */ + double scaleY) /* Amount to scale in Y direction. */ { ImageItem *imgPtr = (ImageItem *) itemPtr; @@ -817,25 +801,24 @@ ScaleImage(canvas, itemPtr, originX, originY, scaleX, scaleY) * * TranslateImage -- * - * This procedure is called to move an item by a given amount. + * This function is called to move an item by a given amount. * * Results: * None. * * Side effects: - * The position of the item is offset by (xDelta, yDelta), and - * the bounding box is updated in the generic part of the item - * structure. + * The position of the item is offset by (xDelta, yDelta), and the + * bounding box is updated in the generic part of the item structure. * *-------------------------------------------------------------- */ static void -TranslateImage(canvas, itemPtr, deltaX, deltaY) - Tk_Canvas canvas; /* Canvas containing item. */ - Tk_Item *itemPtr; /* Item that is being moved. */ - double deltaX, deltaY; /* Amount by which item is to be - * moved. */ +TranslateImage( + Tk_Canvas canvas, /* Canvas containing item. */ + Tk_Item *itemPtr, /* Item that is being moved. */ + double deltaX, double deltaY) + /* Amount by which item is to be moved. */ { ImageItem *imgPtr = (ImageItem *) itemPtr; @@ -849,9 +832,9 @@ TranslateImage(canvas, itemPtr, deltaX, deltaY) * * ImageChangedProc -- * - * This procedure is invoked by the image code whenever the manager - * for an image does something that affects the image's size or - * how it is displayed. + * This function is invoked by the image code whenever the manager for an + * image does something that affects the image's size or how it is + * displayed. * * Results: * None. @@ -863,21 +846,21 @@ TranslateImage(canvas, itemPtr, deltaX, deltaY) */ static void -ImageChangedProc(clientData, x, y, width, height, imgWidth, imgHeight) - ClientData clientData; /* Pointer to canvas item for image. */ - int x, y; /* Upper left pixel (within image) - * that must be redisplayed. */ - int width, height; /* Dimensions of area to redisplay - * (may be <= 0). */ - int imgWidth, imgHeight; /* New dimensions of image. */ +ImageChangedProc( + ClientData clientData, /* Pointer to canvas item for image. */ + int x, int y, /* Upper left pixel (within image) that must + * be redisplayed. */ + int width, int height, /* Dimensions of area to redisplay (may be <= + * 0). */ + int imgWidth, int imgHeight)/* New dimensions of image. */ { ImageItem *imgPtr = (ImageItem *) clientData; /* - * If the image's size changed and it's not anchored at its - * northwest corner then just redisplay the entire area of the - * image. This is a bit over-conservative, but we need to do - * something because a size change also means a position change. + * If the image's size changed and it's not anchored at its northwest + * corner then just redisplay the entire area of the image. This is a bit + * over-conservative, but we need to do something because a size change + * also means a position change. */ if (((imgPtr->header.x2 - imgPtr->header.x1) != imgWidth) @@ -887,9 +870,17 @@ ImageChangedProc(clientData, x, y, width, height, imgWidth, imgHeight) height = imgHeight; Tk_CanvasEventuallyRedraw(imgPtr->canvas, imgPtr->header.x1, imgPtr->header.y1, imgPtr->header.x2, imgPtr->header.y2); - } + } ComputeImageBbox(imgPtr->canvas, imgPtr); Tk_CanvasEventuallyRedraw(imgPtr->canvas, imgPtr->header.x1 + x, imgPtr->header.y1 + y, (int) (imgPtr->header.x1 + x + width), (int) (imgPtr->header.y1 + y + height)); } + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |