stk/Tk/xlib/xgc.c

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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;
}