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now using _NET_FRAME_EXTENTS if available to get size of window decorations

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git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1704 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
dcnieho 2014-08-29 00:41:03 +00:00
parent b0288518d1
commit 804a62ab58
1 changed files with 61 additions and 11 deletions
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70
freeglut/freeglut/src/x11/fg_state_x11.c
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@ -84,8 +84,6 @@ int fgPlatformGlutGet ( GLenum eWhat )
*/
case GLUT_WINDOW_X:
case GLUT_WINDOW_Y:
case GLUT_WINDOW_BORDER_WIDTH:
case GLUT_WINDOW_HEADER_HEIGHT:
{
int x, y;
Window p,w;
@ -112,19 +110,71 @@ int fgPlatformGlutGet ( GLenum eWhat )
case GLUT_WINDOW_X: return x;
case GLUT_WINDOW_Y: return y;
}
}
if ( w == 0 || fgStructure.CurrentWindow->Parent)
/* logic below needs w, and child windows don't have borders */
case GLUT_WINDOW_BORDER_WIDTH:
case GLUT_WINDOW_HEADER_HEIGHT:
{
Atom actual_type, net_extents;
int actual_format;
unsigned long nitems, bytes_after;
unsigned char *data = NULL;
int result, top, left;
if (fgStructure.CurrentWindow == NULL || fgStructure.CurrentWindow->Parent)
/* can't get widths/heights if no current window
* and child windows don't have borders */
return 0;
XTranslateCoordinates(
fgDisplay.pDisplay.Display,
fgStructure.CurrentWindow->Window.Handle,
w, 0, 0, &x, &y, &w);
/* try to get through _NET_FRAME_EXTENTS */
net_extents = XInternAtom(fgDisplay.pDisplay.Display, "_NET_FRAME_EXTENTS", False);
result = XGetWindowProperty(
fgDisplay.pDisplay.Display, fgStructure.CurrentWindow->Window.Handle, net_extents,
0, 4, False, AnyPropertyType,
&actual_type, &actual_format,
&nitems, &bytes_after, &data);
if (result == Success && nitems == 4 && bytes_after == 0)
/* got the data we expected, here's to hoping that
* _NET_FRAME_EXTENTS is supported and the data
* contain sensible values */
{
long *extents = (long *)data;
left = (int) extents[0]; /* we take left as border width, consistent with old logic. bottom and right better be the same... */
top = (int) extents[2];
}
else
{
/* try in the previous way as fall-back */
Window w;
int x,y;
XTranslateCoordinates(
fgDisplay.pDisplay.Display,
fgStructure.CurrentWindow->Window.Handle,
fgDisplay.pDisplay.RootWindow,
0, 0, &x, &y, &w);
if (w == 0)
/* logic below needs w */
return 0;
XTranslateCoordinates(
fgDisplay.pDisplay.Display,
fgStructure.CurrentWindow->Window.Handle,
w, 0, 0, &x, &y, &w);
left = x;
top = y;
}
if (result == Success)
XFree(data);
switch ( eWhat )
{
case GLUT_WINDOW_BORDER_WIDTH: return x;
case GLUT_WINDOW_HEADER_HEIGHT: return y;
case GLUT_WINDOW_BORDER_WIDTH: return left;
case GLUT_WINDOW_HEADER_HEIGHT: return top;
}
}