/* * 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 1.7.4.1 2009/04/30 13:48:00 dkf 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 *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, (DWORD) planes, (DWORD) depth, NULL); /* * CreateBitmap tries to use memory on the graphics card. If it fails, * call CreateDIBSection which uses real memory; slower, but at least * still works. [Bug 2080533] */ if (newTwdPtr->bitmap.handle == NULL) { static int repeatError = 0; unsigned char *bits = NULL; BITMAPINFO bitmapInfo; HDC dc; memset(&bitmapInfo, 0, sizeof(bitmapInfo)); bitmapInfo.bmiHeader.biSize = sizeof(bitmapInfo.bmiHeader); bitmapInfo.bmiHeader.biWidth = width; bitmapInfo.bmiHeader.biHeight = height; bitmapInfo.bmiHeader.biPlanes = planes; bitmapInfo.bmiHeader.biBitCount = depth; bitmapInfo.bmiHeader.biCompression = BI_RGB; bitmapInfo.bmiHeader.biSizeImage = 0; dc = GetDC(NULL); newTwdPtr->bitmap.handle = CreateDIBSection(dc, &bitmapInfo, DIB_RGB_COLORS, (void **) &bits, 0, 0); ReleaseDC(NULL, dc); /* * Oh no! Things are still going wrong. Pop up a warning message here * (because things will probably crash soon) which will encourage * people to report this as a bug... */ if (newTwdPtr->bitmap.handle == NULL && !repeatError) { LPVOID lpMsgBuf; repeatError = 1; if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpMsgBuf, 0, NULL)) { MessageBox(NULL, (LPCTSTR) lpMsgBuf, "Tk_GetPixmap: Error from CreateDIBSection", MB_OK | MB_ICONINFORMATION); LocalFree(lpMsgBuf); } } } 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 *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 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 *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) { Tcl_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)) { Tcl_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) { Tcl_Panic("XGetGeometry: invalid window"); } GetClientRect(twdPtr->window.handle, &rect); *width_return = rect.right - rect.left; *height_return = rect.bottom - rect.top; } else { Tcl_Panic("XGetGeometry: invalid window"); } return 1; } /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */