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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 1.7.4.2 2010/03/12 13:02:36 nijtmans 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;
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, (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:
*/
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