Original explanatory text:
Fix for throwing BadDrawable (invalid Pixmap or Window parameter)
by Xserver when calling XCreatePixmap or fill_bitmap from
DRI_glXUseXFont.
currentDrawable which came from __glXGetCurrentContext was not correct in
this case, we use DefaultRootWindow(dpy) instead.
To reproduce this error you just have to call this:
dpy = (machine.display)->handle();
fontStruct = XLoadQueryFont(dpy, "fixed");
int firstGlyph = fontStruct->min_char_or_byte2;
int dispListBase = 1;
glXUseXFont(fontStruct->fid, firstGlyph, 1, dispListBase);
And you will get this:
X Error of failed request: BadDrawable (invalid Pixmap or Window parameter)
Major opcode of failed request: 53 (X_CreatePixmap)
Feedback from CC reporters would be really helpful.
-----Original Message-----
From: Ian Romanick [mailto:[email protected]]
Sent: Wednesday, September 04, 2013 7:09 PM
To: Maniak, Lukasz
Cc: [email protected]; Alexander Monakov; [email protected]
Subject: Re: [Mesa-dev] [PATCH] Fix for throwing BadDrawable (invalid Pixmap or
Window parameter) by Xserver
The explanatory text from the mangled version of the patch should be included
here as well.
Can you give some more explanation of how this can occur? I'd like to have a
piglit test. Looking at the documentation for glXUseXFont, there needs to be a
valid context bound, and there is some commentary about invalid windows:
"GLXBadCurrentWindow is generated if the drawable associated
with the current context of the calling thread is a window,
and that window is no longer valid."
Also, this seems related to
https://bugs.freedesktop.org/show_bug.cgi?id=56922
and possibly
https://bugs.freedesktop.org/show_bug.cgi?id=54080
Perhaps the reporters of those bugs (added to CC) can comment on whether this
change fixes their bugs.
On 09/04/2013 09:40 AM, Lukasz Maniak wrote:
> Signed-off-by: Lukasz Maniak <[email protected]>
> ---
> src/glx/xfont.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/src/glx/xfont.c b/src/glx/xfont.c index 316c585..60e28ab
> 100644
> --- a/src/glx/xfont.c
> +++ b/src/glx/xfont.c
> @@ -215,7 +215,6 @@ _X_HIDDEN void
> DRI_glXUseXFont(struct glx_context *CC, Font font, int first, int
> count, int listbase) {
> Display *dpy;
> - Window win;
> Pixmap pixmap;
> GC gc;
> XGCValues values;
> @@ -231,7 +230,6 @@ DRI_glXUseXFont(struct glx_context *CC, Font font, int
> first, int count, int lis
> int i;
>
> dpy = CC->currentDpy;
> - win = CC->currentDrawable;
>
> fs = XQueryFont(dpy, font);
> if (!fs) {
> @@ -279,7 +277,7 @@ DRI_glXUseXFont(struct glx_context *CC, Font font, int
> first, int count, int lis
> glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
> glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
>
> - pixmap = XCreatePixmap(dpy, win, 10, 10, 1);
> + pixmap = XCreatePixmap(dpy, DefaultRootWindow(dpy), 10, 10, 1);
> values.foreground = BlackPixel(dpy, DefaultScreen(dpy));
> values.background = WhitePixel(dpy, DefaultScreen(dpy));
> values.font = fs->fid;
> @@ -342,7 +340,7 @@ DRI_glXUseXFont(struct glx_context *CC, Font font, int
> first, int count, int lis
> if (valid && (bm_width > 0) && (bm_height > 0)) {
>
> memset(bm, '\0', bm_width * bm_height);
> - fill_bitmap(dpy, win, gc, bm_width, bm_height, x, y, c, bm);
> + fill_bitmap(dpy, DefaultRootWindow(dpy), gc, bm_width,
> + bm_height, x, y, c, bm);
>
> glBitmap(width, height, x0, y0, dx, dy, bm); #ifdef DEBUG
>
---------------------------------------------------------------------
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