[xserver patch v5 3/5] glx: Enforce a 1:1 correspondence between GLX and X11 windows.

[Kristian Høgsberg]

2010/2/8 Francisco Jerez <currojerez at riseup.net>:
> The spec says (regarding glXCreateWindow): "If there is already a
> GLXFBConfig associated with win (as a result of a previous
> glXCreateWindow call), then a BadAlloc error is generated.". It will
> also come useful to implement DRI2InvalidateBuffers for the indirect
> case.
>
> Signed-off-by: Francisco Jerez <currojerez at riseup.net>

Looks good,

Reviewed-by: Kristian Høgsberg <krh at bitplanet.net>

> ---
> v5: Simplification as suggested by Kristian.
>
>  glx/glxcmds.c   |   24 +++++++++++++++++++++++-
>  glx/glxserver.h |    1 +
>  2 files changed, 24 insertions(+), 1 deletions(-)
>
> diff --git a/glx/glxcmds.c b/glx/glxcmds.c
> index 77afbf4..cac30e6 100644
> --- a/glx/glxcmds.c
> +++ b/glx/glxcmds.c
> @@ -51,6 +51,15 @@
>  #include "indirect_table.h"
>  #include "indirect_util.h"
>
> +static int glxWindowPrivateKeyIndex;
> +static DevPrivateKey glxWindowPrivateKey = &glxWindowPrivateKeyIndex;
> +
> +__GLXdrawable *
> +glxGetDrawableFromWindow(WindowPtr pWin)
> +{
> +       return dixLookupPrivate(&pWin->devPrivates, glxWindowPrivateKey);
> +}
> +
>  static int
>  validGlxScreen(ClientPtr client, int screen, __GLXscreen **pGlxScreen, int *err)
>  {
> @@ -519,6 +528,9 @@ __glXGetDrawable(__GLXcontext *glxc, GLXDrawable drawId, ClientPtr client,
>        return NULL;
>     }
>
> +    dixSetPrivate(&((WindowPtr)pDraw)->devPrivates, glxWindowPrivateKey,
> +                 pGlxDraw);
> +
>     return pGlxDraw;
>  }
>
> @@ -1107,7 +1119,7 @@ __glXDrawableRelease(__GLXdrawable *drawable)
>     }
>  }
>
> -static int
> +static int
>  DoCreateGLXDrawable(ClientPtr client, __GLXscreen *pGlxScreen, __GLXconfig *config,
>                    DrawablePtr pDraw, XID glxDrawableId, int type)
>  {
> @@ -1128,6 +1140,10 @@ DoCreateGLXDrawable(ClientPtr client, __GLXscreen *pGlxScreen, __GLXconfig *conf
>        return BadAlloc;
>     }
>
> +    if (type == GLX_DRAWABLE_WINDOW)
> +           dixSetPrivate(&((WindowPtr)pDraw)->devPrivates,
> +                         glxWindowPrivateKey, pGlxDraw);
> +
>     return Success;
>  }
>
> @@ -1422,6 +1438,12 @@ int __glXDisp_CreateWindow(__GLXclientState *cl, GLbyte *pc)
>        return BadWindow;
>     }
>
> +    /* Make sure there're no already associated GLX drawables. */
> +    if (glxGetDrawableFromWindow((WindowPtr)pDraw)) {
> +       client->errorValue = req->window;
> +       return BadAlloc;
> +    }
> +
>     if (!validGlxFBConfigForWindow(client, config, pDraw, &err))
>        return err;
>
> diff --git a/glx/glxserver.h b/glx/glxserver.h
> index 1daf977..3c49b5e 100644
> --- a/glx/glxserver.h
> +++ b/glx/glxserver.h
> @@ -80,6 +80,7 @@ typedef struct __GLXcontext __GLXcontext;
>
>  extern __GLXscreen *glxGetScreen(ScreenPtr pScreen);
>  extern __GLXclientState *glxGetClient(ClientPtr pClient);
> +extern __GLXdrawable *glxGetDrawableFromWindow(WindowPtr pWin);
>
>  /************************************************************************/
>
> --
> 1.6.4.4
>
>