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- /*
- * xgc.c --
- *
- * This file contains generic routines for manipulating X graphics
- * contexts.
- *
- * Copyright (c) 1995-1996 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * SCCS: @(#) xgc.c 1.8 96/10/11 14:59:39
- */
-
- #include <tkInt.h>
-
- #ifdef MAC_TCL
- # include <Xlib.h>
- #else
- # include <X11/Xlib.h>
- #endif
-
-
- /*
- *----------------------------------------------------------------------
- *
- * XCreateGC --
- *
- * Allocate a new GC, and initialize the specified fields.
- *
- * Results:
- * Returns a newly allocated GC.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- GC
- XCreateGC(display, d, mask, values)
- Display* display;
- Drawable d;
- unsigned long mask;
- XGCValues* values;
- {
- GC gp;
-
- gp = (XGCValues *)ckalloc(sizeof(XGCValues));
- if (!gp) {
- return None;
- }
-
- gp->function = (mask & GCFunction) ?values->function :GXcopy;
- gp->plane_mask = (mask & GCPlaneMask) ?values->plane_mask :~0;
- gp->foreground = (mask & GCForeground) ?values->foreground :0;
- gp->background = (mask & GCBackground) ?values->background :0xffffff;
- gp->line_width = (mask & GCLineWidth) ?values->line_width :0;
- gp->line_style = (mask & GCLineStyle) ?values->line_style :LineSolid;
- gp->cap_style = (mask & GCCapStyle) ?values->cap_style :0;
- gp->join_style = (mask & GCJoinStyle) ?values->join_style :0;
- gp->fill_style = (mask & GCFillStyle) ?values->fill_style :FillSolid;
- gp->fill_rule = (mask & GCFillRule) ?values->fill_rule :WindingRule;
- gp->arc_mode = (mask & GCArcMode) ?values->arc_mode :ArcPieSlice;
- gp->tile = (mask & GCTile) ?values->tile :None;
- gp->stipple = (mask & GCStipple) ?values->stipple :None;
- gp->ts_x_origin = (mask & GCTileStipXOrigin) ?values->ts_x_origin:0;
- gp->ts_y_origin = (mask & GCTileStipYOrigin) ?values->ts_y_origin:0;
- gp->font = (mask & GCFont) ?values->font :None;
- gp->subwindow_mode = (mask & GCSubwindowMode)?values->subwindow_mode:ClipByChildren;
- gp->graphics_exposures = (mask & GCGraphicsExposures)?values->graphics_exposures:True;
- gp->clip_x_origin = (mask & GCClipXOrigin) ?values->clip_x_origin :0;
- gp->clip_y_origin = (mask & GCClipYOrigin) ?values->clip_y_origin :0;
- gp->dash_offset = (mask & GCDashOffset) ?values->dash_offset :0;
- gp->dashes = (mask & GCDashList) ?values->dashes :4;
-
- if (mask & GCClipMask) {
- gp->clip_mask = (Pixmap)ckalloc(sizeof(TkpClipMask));
- ((TkpClipMask*)gp->clip_mask)->type = TKP_CLIP_PIXMAP;
- ((TkpClipMask*)gp->clip_mask)->value.pixmap = values->clip_mask;
- } else {
- gp->clip_mask = None;
- }
-
- return gp;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * XChangeGC --
- *
- * Changes the GC components specified by valuemask for the
- * specified GC.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Updates the specified GC.
- *
- *----------------------------------------------------------------------
- */
-
- void
- XChangeGC(d, gc, mask, values)
- Display * d;
- GC gc;
- unsigned long mask;
- XGCValues *values;
- {
- if (mask & GCFunction) { gc->function = values->function; }
- if (mask & GCPlaneMask) { gc->plane_mask = values->plane_mask; }
- if (mask & GCForeground) { gc->foreground = values->foreground; }
- if (mask & GCBackground) { gc->background = values->background; }
- if (mask & GCLineWidth) { gc->line_width = values->line_width; }
- if (mask & GCLineStyle) { gc->line_style = values->line_style; }
- if (mask & GCCapStyle) { gc->cap_style = values->cap_style; }
- if (mask & GCJoinStyle) { gc->join_style = values->join_style; }
- if (mask & GCFillStyle) { gc->fill_style = values->fill_style; }
- if (mask & GCFillRule) { gc->fill_rule = values->fill_rule; }
- if (mask & GCArcMode) { gc->arc_mode = values->arc_mode; }
- if (mask & GCTile) { gc->tile = values->tile; }
- if (mask & GCStipple) { gc->stipple = values->stipple; }
- if (mask & GCTileStipXOrigin) { gc->ts_x_origin = values->ts_x_origin; }
- if (mask & GCTileStipYOrigin) { gc->ts_y_origin = values->ts_y_origin; }
- if (mask & GCFont) { gc->font = values->font; }
- if (mask & GCSubwindowMode) { gc->subwindow_mode = values->subwindow_mode; }
- if (mask & GCGraphicsExposures) { gc->graphics_exposures = values->graphics_exposures; }
- if (mask & GCClipXOrigin) { gc->clip_x_origin = values->clip_x_origin; }
- if (mask & GCClipYOrigin) { gc->clip_y_origin = values->clip_y_origin; }
- if (mask & GCClipMask) { XSetClipMask(d, gc, values->clip_mask); }
- if (mask & GCDashOffset) { gc->dash_offset = values->dash_offset; }
- if (mask & GCDashList) { gc->dashes = values->dashes; }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * XFreeGC --
- *
- * Deallocates the specified graphics context.
- *
- * Results:
- * None.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- void
- XFreeGC(d, gc)
- Display * d;
- GC gc;
- {
- if (gc != None) {
- if (gc->clip_mask != None) {
- ckfree((char*) gc->clip_mask);
- }
- ckfree((char *) gc);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * XSetForeground, etc. --
- *
- * The following functions are simply accessor functions for
- * the GC slots.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Each function sets some slot in the GC.
- *
- *----------------------------------------------------------------------
- */
-
- void
- XSetForeground(display, gc, foreground)
- Display *display;
- GC gc;
- unsigned long foreground;
- {
- gc->foreground = foreground;
- }
-
- void
- XSetBackground(display, gc, background)
- Display *display;
- GC gc;
- unsigned long background;
- {
- gc->background = background;
- }
-
- void
- XSetFunction(display, gc, function)
- Display *display;
- GC gc;
- int function;
- {
- gc->function = function;
- }
-
- void
- XSetFillRule(display, gc, fill_rule)
- Display *display;
- GC gc;
- int fill_rule;
- {
- gc->fill_rule = fill_rule;
- }
-
- void
- XSetFillStyle(display, gc, fill_style)
- Display *display;
- GC gc;
- int fill_style;
- {
- gc->fill_style = fill_style;
- }
-
- void
- XSetTSOrigin(display, gc, x, y)
- Display *display;
- GC gc;
- int x, y;
- {
- gc->ts_x_origin = x;
- gc->ts_y_origin = y;
- }
-
- void
- XSetFont(display, gc, font)
- Display *display;
- GC gc;
- Font font;
- {
- gc->font = font;
- }
-
- void
- XSetArcMode(display, gc, arc_mode)
- Display *display;
- GC gc;
- int arc_mode;
- {
- gc->arc_mode = arc_mode;
- }
-
- void
- XSetStipple(display, gc, stipple)
- Display *display;
- GC gc;
- Pixmap stipple;
- {
- gc->stipple = stipple;
- }
-
- void
- XSetLineAttributes(display, gc, line_width, line_style, cap_style,
- join_style)
- Display *display;
- GC gc;
- unsigned int line_width;
- int line_style;
- int cap_style;
- int join_style;
- {
- gc->line_width = line_width;
- gc->line_style = line_style;
- gc->cap_style = cap_style;
- gc->join_style = join_style;
- }
-
- void
- XSetClipOrigin(display, gc, clip_x_origin, clip_y_origin)
- Display* display;
- GC gc;
- int clip_x_origin;
- int clip_y_origin;
- {
- gc->clip_x_origin = clip_x_origin;
- gc->clip_y_origin = clip_y_origin;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * TkSetRegion, XSetClipMask --
- *
- * Sets the clipping region/pixmap for a GC.
- *
- * Note that unlike the Xlib equivalent, it is not safe to delete
- * the region after setting it into the GC. The only use of
- * TkSetRegion is currently in ImgPhotoDisplay, which uses the GC
- * immediately.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Allocates or dealloates a TkpClipMask.
- *
- *----------------------------------------------------------------------
- */
-
- void
- TkSetRegion(display, gc, r)
- Display* display;
- GC gc;
- TkRegion r;
- {
- if (r == None) {
- if (gc->clip_mask) {
- ckfree((char*) gc->clip_mask);
- gc->clip_mask = None;
- }
- return;
- }
-
- if (gc->clip_mask == None) {
- gc->clip_mask = (Pixmap)ckalloc(sizeof(TkpClipMask));
- }
- ((TkpClipMask*)gc->clip_mask)->type = TKP_CLIP_REGION;
- ((TkpClipMask*)gc->clip_mask)->value.region = r;
- }
-
- void
- XSetClipMask(display, gc, pixmap)
- Display* display;
- GC gc;
- Pixmap pixmap;
- {
- if (pixmap == None) {
- if (gc->clip_mask) {
- ckfree((char*) gc->clip_mask);
- gc->clip_mask = None;
- }
- return;
- }
-
- if (gc->clip_mask == None) {
- gc->clip_mask = (Pixmap)ckalloc(sizeof(TkpClipMask));
- }
- ((TkpClipMask*)gc->clip_mask)->type = TKP_CLIP_PIXMAP;
- ((TkpClipMask*)gc->clip_mask)->value.pixmap = pixmap;
- }
-