glx: Fix glxUseXFont for glxWindow and glxPixmaps

The current implementation of glxUseXFont requires creating
a temporary pixmap and graphics context, which requires a real
old-school X11 Window, not a glxDrawable. This patch changes
things so that glxUseXFont will also accept a glxWindow or
glxPixmap, and lookup the underlying X11 Drawable. Without
this patch glxUseXFont generates a giant stream of Xerrors
about bad drawables and bad graphics contexts.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54372

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Brian Paul <brianp@vmware.com>

diff --git a/src/glx/xfont.c b/src/glx/xfont.c
index 316c585..a086b7a 100644 (file)
--- a/src/glx/xfont.c
+++ b/src/glx/xfont.c
@@ -221,6 +221,7 @@ DRI_glXUseXFont(struct glx_context *CC, Font font, int first, int count, int lis
    XGCValues values;
    unsigned long valuemask;
    XFontStruct *fs;
+   __GLXDRIdrawable *glxdraw;
 
    GLint swapbytes, lsbfirst, rowlength;
    GLint skiprows, skippixels, alignment;
@@ -233,6 +234,10 @@ DRI_glXUseXFont(struct glx_context *CC, Font font, int first, int count, int lis
    dpy = CC->currentDpy;
    win = CC->currentDrawable;
 
+   glxdraw = GetGLXDRIDrawable(CC->currentDpy, CC->currentDrawable);
+   if (glxdraw)
+      win = glxdraw->xDrawable;
+
    fs = XQueryFont(dpy, font);
    if (!fs) {
       __glXSetError(CC, GL_INVALID_VALUE);