tkWinPixmap.c
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上传日期:2015-12-11
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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.
- *
- * RCS: @(#) $Id: tkWinPixmap.c,v 1.3 2000/02/01 11:41:44 hobbs Exp $
- */
- #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;
- int planes;
- Screen *screen;
-
- 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;
- }
- screen = &display->screens[0];
- planes = 1;
- if (depth == screen->root_depth) {
- planes = (int) screen->ext_data;
- depth /= planes;
- }
- newTwdPtr->bitmap.handle = CreateBitmap(width, height, planes, 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;
- }
- /*
- *----------------------------------------------------------------------
- *
- * XGetGeometry --
- *
- * Retrieve the geometry of the given drawable. Note that
- * this is a degenerate implementation that only returns the
- * size of a pixmap or window.
- *
- * Results:
- * Returns 0.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- int
- XGetGeometry(display, d, root_return, x_return, y_return, width_return,
- height_return, border_width_return, depth_return)
- Display* display;
- Drawable d;
- Window* root_return;
- int* x_return;
- int* y_return;
- unsigned int* width_return;
- unsigned int* height_return;
- unsigned int* border_width_return;
- unsigned int* depth_return;
- {
- TkWinDrawable *twdPtr = (TkWinDrawable *)d;
- if (twdPtr->type == TWD_BITMAP) {
- HDC dc;
- BITMAPINFO info;
- if (twdPtr->bitmap.handle == NULL) {
- panic("XGetGeometry: invalid pixmap");
- }
- dc = GetDC(NULL);
- info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
- info.bmiHeader.biBitCount = 0;
- if (!GetDIBits(dc, twdPtr->bitmap.handle, 0, 0, NULL, &info,
- DIB_RGB_COLORS)) {
- panic("XGetGeometry: unable to get bitmap size");
- }
- ReleaseDC(NULL, dc);
- *width_return = info.bmiHeader.biWidth;
- *height_return = info.bmiHeader.biHeight;
- } else if (twdPtr->type == TWD_WINDOW) {
- RECT rect;
- if (twdPtr->window.handle == NULL) {
- panic("XGetGeometry: invalid window");
- }
- GetClientRect(twdPtr->window.handle, &rect);
- *width_return = rect.right - rect.left;
- *height_return = rect.bottom - rect.top;
- } else {
- panic("XGetGeometry: invalid window");
- }
- return 1;
- }