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Diffstat (limited to 'tk8.6/win/tkWinPixmap.c')
| -rw-r--r-- | tk8.6/win/tkWinPixmap.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/tk8.6/win/tkWinPixmap.c b/tk8.6/win/tkWinPixmap.c new file mode 100644 index 0000000..aa1ebde --- /dev/null +++ b/tk8.6/win/tkWinPixmap.c @@ -0,0 +1,251 @@ +/* + * 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. + */ + +#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 = 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 = PTR2INT(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; + void *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, &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, (LPTSTR) lpMsgBuf, + TEXT("Tk_GetPixmap: Error from CreateDIBSection"), + MB_OK | MB_ICONINFORMATION); + LocalFree(lpMsgBuf); + } + } + } + + if (newTwdPtr->bitmap.handle == NULL) { + ckfree(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(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: + */ |