archie/tk4.2/win/tkWinPixmap.c
2024-05-27 16:40:40 +02:00

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/*
* tkWinPixmap.c --
*
* This file contains the Xlib emulation functions pertaining to
* creating and destroying pixmaps.
*
* Copyright (c) 1995 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: @(#) tkWinPixmap.c 1.15 96/10/11 14:58:31
*/
#include "tkWinInt.h"
/*
*----------------------------------------------------------------------
*
* Tk_GetPixmap --
*
* Creates an in memory drawing surface.
*
* Results:
* Returns a handle to a new pixmap.
*
* Side effects:
* Allocates a new Win32 bitmap.
*
*----------------------------------------------------------------------
*/
Pixmap
Tk_GetPixmap(display, d, width, height, depth)
Display* display;
Drawable d;
int width;
int height;
int depth;
{
TkWinDrawable *newTwdPtr, *twdPtr;
display->request++;
newTwdPtr = (TkWinDrawable*) ckalloc(sizeof(TkWinDrawable));
newTwdPtr->type = TWD_BITMAP;
newTwdPtr->bitmap.depth = depth;
twdPtr = (TkWinDrawable *)d;
if (twdPtr->type != TWD_BITMAP) {
if (twdPtr->window.winPtr == NULL) {
newTwdPtr->bitmap.colormap = DefaultColormap(display,
DefaultScreen(display));
} else {
newTwdPtr->bitmap.colormap = twdPtr->window.winPtr->atts.colormap;
}
} else {
newTwdPtr->bitmap.colormap = twdPtr->bitmap.colormap;
}
newTwdPtr->bitmap.handle = CreateBitmap(width, height, 1, depth, NULL);
if (newTwdPtr->bitmap.handle == NULL) {
ckfree((char *) newTwdPtr);
return None;
}
return (Pixmap)newTwdPtr;
}
/*
*----------------------------------------------------------------------
*
* Tk_FreePixmap --
*
* Release the resources associated with a pixmap.
*
* Results:
* None.
*
* Side effects:
* Deletes the bitmap created by Tk_GetPixmap.
*
*----------------------------------------------------------------------
*/
void
Tk_FreePixmap(display, pixmap)
Display* display;
Pixmap pixmap;
{
TkWinDrawable *twdPtr = (TkWinDrawable *) pixmap;
display->request++;
if (twdPtr != NULL) {
DeleteObject(twdPtr->bitmap.handle);
ckfree((char *)twdPtr);
}
}
/*
*----------------------------------------------------------------------
*
* TkSetPixmapColormap --
*
* The following function is a hack used by the photo widget to
* explicitly set the colormap slot of a Pixmap.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
TkSetPixmapColormap(pixmap, colormap)
Pixmap pixmap;
Colormap colormap;
{
TkWinDrawable *twdPtr = (TkWinDrawable *)pixmap;
twdPtr->bitmap.colormap = colormap;
}