glx: Clean up some funny business from context bind/unbind

We always fully unbind the old context before binding the new one, so
there's no point in passing both contexts to both the unbind and then
the bind.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20549>

src/glx/applegl_glx.c

@@ -50,13 +50,13 @@ applegl_destroy_context(struct glx_context *gc)
 
 static int
 applegl_bind_context(
-    struct glx_context *gc, struct glx_context *old,
+    struct glx_context *gc,
     GLXDrawable draw, GLXDrawable read)
 {
    Display *dpy = gc->psc->dpy;
    bool error = apple_glx_make_current_context(
        dpy,
-       (old && old != &dummyContext) ? old->driContext : NULL,
+       NULL,
        gc ? gc->driContext : NULL, draw);
 
    apple_glx_diagnostic("%s: error %s\n", __func__, error ? "YES" : "NO");
@@ -69,7 +69,7 @@ applegl_bind_context(
 }
 
 static void
-applegl_unbind_context(struct glx_context *gc, struct glx_context *new)
+applegl_unbind_context(struct glx_context *gc)
 {
    Display *dpy;
    bool error;
@@ -78,10 +78,6 @@ applegl_unbind_context(struct glx_context *gc, struct glx_context *new)
    if (!gc)
       return;
 
-   /* If we have a new context, keep this one around and remove it during bind. */
-   if (new)
-      return;
-
    dpy = gc->psc->dpy;
 
    error = apple_glx_make_current_context(

src/glx/dri2_glx.c

@@ -111,8 +111,7 @@ dri2_destroy_context(struct glx_context *context)
 }
 
 static Bool
-dri2_bind_context(struct glx_context *context, struct glx_context *old,
-		  GLXDrawable draw, GLXDrawable read)
+dri2_bind_context(struct glx_context *context, GLXDrawable draw, GLXDrawable read)
 {
    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
    struct dri2_drawable *pdraw, *pread;
@@ -140,7 +139,7 @@ dri2_bind_context(struct glx_context *context, struct glx_context *old,
 }
 
 static void
-dri2_unbind_context(struct glx_context *context, struct glx_context *new)
+dri2_unbind_context(struct glx_context *context)
 {
    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 

src/glx/dri3_glx.c

@@ -157,8 +157,7 @@ dri3_destroy_context(struct glx_context *context)
 }
 
 static Bool
-dri3_bind_context(struct glx_context *context, struct glx_context *old,
-                  GLXDrawable draw, GLXDrawable read)
+dri3_bind_context(struct glx_context *context, GLXDrawable draw, GLXDrawable read)
 {
    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
    struct dri3_drawable *pdraw, *pread;
@@ -191,7 +190,7 @@ dri3_bind_context(struct glx_context *context, struct glx_context *old,
 }
 
 static void
-dri3_unbind_context(struct glx_context *context, struct glx_context *new)
+dri3_unbind_context(struct glx_context *context)
 {
    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 

src/glx/drisw_glx.c

@@ -431,8 +431,7 @@ drisw_destroy_context(struct glx_context *context)
 }
 
 static int
-drisw_bind_context(struct glx_context *context, struct glx_context *old,
-                   GLXDrawable draw, GLXDrawable read)
+drisw_bind_context(struct glx_context *context, GLXDrawable draw, GLXDrawable read)
 {
    struct drisw_screen *psc = (struct drisw_screen *) context->psc;
    struct drisw_drawable *pdraw, *pread;
@@ -457,7 +456,7 @@ drisw_bind_context(struct glx_context *context, struct glx_context *old,
 }
 
 static void
-drisw_unbind_context(struct glx_context *context, struct glx_context *new)
+drisw_unbind_context(struct glx_context *context)
 {
    struct drisw_screen *psc = (struct drisw_screen *) context->psc;
 

src/glx/driwindows_glx.c

@@ -79,8 +79,7 @@ driwindows_destroy_context(struct glx_context *context)
 }
 
 static int
-driwindows_bind_context(struct glx_context *context, struct glx_context *old,
-                        GLXDrawable draw, GLXDrawable read)
+driwindows_bind_context(struct glx_context *context, GLXDrawable draw, GLXDrawable read)
 {
    struct driwindows_context *pcp = (struct driwindows_context *) context;
    struct driwindows_drawable *pdraw, *pread;
@@ -101,7 +100,7 @@ driwindows_bind_context(struct glx_context *context, struct glx_context *old,
 }
 
 static void
-driwindows_unbind_context(struct glx_context *context, struct glx_context *new)
+driwindows_unbind_context(struct glx_context *context)
 {
    struct driwindows_context *pcp = (struct driwindows_context *) context;
 

src/glx/glxclient.h

@@ -210,9 +210,8 @@ struct mesa_glinterop_export_out;
 
 struct glx_context_vtable {
    void (*destroy)(struct glx_context *ctx);
-   int (*bind)(struct glx_context *context, struct glx_context *old,
-	       GLXDrawable draw, GLXDrawable read);
-   void (*unbind)(struct glx_context *context, struct glx_context *new_ctx);
+   int (*bind)(struct glx_context *context, GLXDrawable draw, GLXDrawable read);
+   void (*unbind)(struct glx_context *context);
    void (*wait_gl)(struct glx_context *ctx);
    void (*wait_x)(struct glx_context *ctx);
    int (*interop_query_device_info)(struct glx_context *ctx,

src/glx/glxcurrent.c

@@ -125,7 +125,7 @@ MakeContextCurrent(Display * dpy, GLXDrawable draw,
    }
 
    if (oldGC != &dummyContext) {
-      oldGC->vtable->unbind(oldGC, gc);
+      oldGC->vtable->unbind(oldGC);
       oldGC->currentDpy = NULL;
    }
 
@@ -138,7 +138,7 @@ MakeContextCurrent(Display * dpy, GLXDrawable draw,
        * blown away our old context.  The caller is responsible for
        * figuring out how to handle setting a valid context.
        */
-      if (gc->vtable->bind(gc, oldGC, draw, read) != Success) {
+      if (gc->vtable->bind(gc, draw, read) != Success) {
          __glXSetCurrentContextNull();
          __glXUnlock();
          __glXSendError(dpy, GLXBadContext, None, opcode, False);

src/glx/indirect_glx.c

@@ -123,21 +123,13 @@ SendMakeCurrentRequest(Display * dpy, GLXContextID gc_id,
 }
 
 static int
-indirect_bind_context(struct glx_context *gc, struct glx_context *old,
+indirect_bind_context(struct glx_context *gc,
 		      GLXDrawable draw, GLXDrawable read)
 {
-   GLXContextTag tag;
    Display *dpy = gc->psc->dpy;
    Bool sent;
 
-   if (old != &dummyContext && !old->isDirect && old->psc->dpy == dpy) {
-      tag = old->currentContextTag;
-      old->currentContextTag = 0;
-   } else {
-      tag = 0;
-   }
-
-   sent = SendMakeCurrentRequest(dpy, gc->xid, tag, draw, read,
+   sent = SendMakeCurrentRequest(dpy, gc->xid, 0, draw, read,
 				 &gc->currentContextTag);
 
    if (sent) {
@@ -166,22 +158,12 @@ indirect_bind_context(struct glx_context *gc, struct glx_context *old,
 }
 
 static void
-indirect_unbind_context(struct glx_context *gc, struct glx_context *new)
+indirect_unbind_context(struct glx_context *gc)
 {
    Display *dpy = gc->psc->dpy;
 
-   if (gc == new)
-      return;
-   
-   /* We are either switching to no context, away from an indirect
-    * context to a direct context or from one dpy to another and have
-    * to send a request to the dpy to unbind the previous context.
-    */
-   if (!new || new->isDirect || new->psc->dpy != dpy) {
-      SendMakeCurrentRequest(dpy, None, gc->currentContextTag, None, None,
-                             NULL);
-      gc->currentContextTag = 0;
-   }
+   SendMakeCurrentRequest(dpy, None, gc->currentContextTag, None, None, NULL);
+   gc->currentContextTag = 0;
 }
 
 static void