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STR 1891: fixing fl_read_image for double buffered windows.

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git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@6065 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Matthias Melcher 2008-03-09 17:58:10 +00:00
parent 75693af5da
commit c6ee3b1922
1 changed files with 10 additions and 10 deletions
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20
src/fl_read_image.cxx
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@ -124,18 +124,18 @@ fl_read_image(uchar *p, // I - Pixel buffer or NULL to allocate
if (!image) {
// fetch absolute coordinates
int dx, dy;
int dx, dy, sx, sy, sw, sh;
Window child_win;
XTranslateCoordinates(fl_display, fl_window,
RootWindow(fl_display, fl_screen), X, Y, &dx, &dy, &child_win);
// screen dimensions
int sx, sy, sw, sh;
Fl::screen_xywh(sx, sy, sw, sh, fl_screen);
if (dx >= sx && dy >= sy && dx + w <= sw && dy + h <= sh) {
Fl_Window *win = fl_find(fl_window);
if (win) {
XTranslateCoordinates(fl_display, fl_window,
RootWindow(fl_display, fl_screen), X, Y, &dx, &dy, &child_win);
// screen dimensions
Fl::screen_xywh(sx, sy, sw, sh, fl_screen);
}
if (!win || (dx >= sx && dy >= sy && dx + w <= sw && dy + h <= sh)) {
// the image is fully contained, we can use the traditional method
image = XGetImage(fl_display, fl_window, X, Y, w, h, AllPlanes, ZPixmap);
image = XGetImage(fl_display, fl_window, X, Y, w, h, AllPlanes, ZPixmap);
} else {
// image is crossing borders, determine visible region
int nw, nh, noffx, noffy;