[Mesa-dev] [PATCH 5/6] glx: Prepare driFetchDrawable for no-config contexts

[Ian Romanick]

On 11/14/2017 12:13 PM, Adam Jackson wrote:
> When we look up the DRI drawable state we need to associate an fbconfig
> with the drawable. With GLX_EXT_no_config_context we can no longer infer
> that from the context and must instead query the server.
> 
> Signed-off-by: Adam Jackson <ajax at redhat.com>
> ---
>  src/glx/dri_common.c  | 22 ++++++++++++++++++++--
>  src/glx/glx_pbuffer.c |  2 +-
>  src/glx/glxclient.h   |  4 ++++
>  3 files changed, 25 insertions(+), 3 deletions(-)
> 
> diff --git a/src/glx/dri_common.c b/src/glx/dri_common.c
> index 3b82309fa2..0d0b2d997b 100644
> --- a/src/glx/dri_common.c
> +++ b/src/glx/dri_common.c
> @@ -396,12 +396,25 @@ driDestroyConfigs(const __DRIconfig **configs)
>     free(configs);
>  }
>  
> +static struct glx_config *
> +driInferDrawableConfig(struct glx_screen *psc, GLXDrawable draw)
> +{
> +   unsigned int fbconfig = 0;
> +
> +   if (GetDrawableAttribute(psc->dpy, draw, GLX_FBCONFIG_ID, &fbconfig)) {
> +      return glx_config_find_fbconfig(psc->configs, fbconfig);
> +   }
> +
> +   return NULL;
> +}
> +
>  _X_HIDDEN __GLXDRIdrawable *
>  driFetchDrawable(struct glx_context *gc, GLXDrawable glxDrawable)
>  {
>     struct glx_display *const priv = __glXInitialize(gc->psc->dpy);
>     __GLXDRIdrawable *pdraw;
>     struct glx_screen *psc;
> +   struct glx_config *config = gc->config;
>  
>     if (priv == NULL)
>        return NULL;
> @@ -418,8 +431,13 @@ driFetchDrawable(struct glx_context *gc, GLXDrawable glxDrawable)
>        return pdraw;
>     }
>  
> -   pdraw = psc->driScreen->createDrawable(psc, glxDrawable,
> -                                          glxDrawable, gc->config);
> +   if (config == NULL)
> +      config = driInferDrawableConfig(gc->psc, glxDrawable);
> +   if (config == NULL)
> +      return NULL;
> +
> +   pdraw = psc->driScreen->createDrawable(psc, glxDrawable, glxDrawable,
> +                                          config);
>  
>     if (pdraw == NULL) {
>        ErrorMessageF("failed to create drawable\n");
> diff --git a/src/glx/glx_pbuffer.c b/src/glx/glx_pbuffer.c
> index 933b5d9ecd..42e7996e37 100644
> --- a/src/glx/glx_pbuffer.c
> +++ b/src/glx/glx_pbuffer.c
> @@ -272,7 +272,7 @@ DestroyDRIDrawable(Display *dpy, GLXDrawable drawable, int destroy_xdrawable)
>   * 10.  Given that, this routine should try to use an array on the stack to
>   * capture the reply rather than always calling Xmalloc.
>   */
> -static int
> +int
>  GetDrawableAttribute(Display * dpy, GLXDrawable drawable,

I'm trying to decide whether or not this needs a __glX prefix now.  Yes?

Other than that, this patch is

Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>

>                       int attribute, unsigned int *value)
>  {
> diff --git a/src/glx/glxclient.h b/src/glx/glxclient.h
> index 0d29e5635e..a448c4c000 100644
> --- a/src/glx/glxclient.h
> +++ b/src/glx/glxclient.h
> @@ -841,6 +841,10 @@ indirect_create_context_attribs(struct glx_screen *base,
>                                  const uint32_t *attribs,
>                                  unsigned *error);
>  
> +
> +extern int GetDrawableAttribute(Display * dpy, GLXDrawable drawable,
> +                                int attribute, unsigned int *value);
> +
>  #ifdef __cplusplus
>  }
>  #endif
>