From 6a6e6d7b0a84e20f9754af02a575ae34081d310c Mon Sep 17 00:00:00 2001 From: Michel Dänzer Date: Tue, 7 Sep 2010 19:49:06 +0200 Subject: Fix crashes when some GLX API entrypoints are called with no current context. I was hitting this with gliv. The GLX spec explicitly mentions that glXWaitX, glXWaitGL and glXUseXFont calls are ignored when there's no current context. Not sure what if anything the GLX_EXT_texture_from_pixmap spec says about this, but I think ignoring the calls makes more sense than crashing there as well. :) --- src/glx/glxcmds.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'src/glx') diff --git a/src/glx/glxcmds.c b/src/glx/glxcmds.c index 7016fdf2a8..d9e370c199 100644 --- a/src/glx/glxcmds.c +++ b/src/glx/glxcmds.c @@ -481,7 +481,7 @@ glXWaitGL(void) { struct glx_context *gc = __glXGetCurrentContext(); - if (gc && gc->vtable->wait_gl) + if (gc && gc->vtable && gc->vtable->wait_gl) gc->vtable->wait_gl(gc); } @@ -494,7 +494,7 @@ glXWaitX(void) { struct glx_context *gc = __glXGetCurrentContext(); - if (gc && gc->vtable->wait_x) + if (gc && gc->vtable && gc->vtable->wait_x) gc->vtable->wait_x(gc); } @@ -503,7 +503,7 @@ glXUseXFont(Font font, int first, int count, int listBase) { struct glx_context *gc = __glXGetCurrentContext(); - if (gc && gc->vtable->use_x_font) + if (gc && gc->vtable && gc->vtable->use_x_font) gc->vtable->use_x_font(gc, font, first, count, listBase); } @@ -2344,7 +2344,7 @@ __glXBindTexImageEXT(Display * dpy, { struct glx_context *gc = __glXGetCurrentContext(); - if (gc == NULL || gc->vtable->bind_tex_image == NULL) + if (gc == NULL || gc->vtable == NULL || gc->vtable->bind_tex_image == NULL) return; gc->vtable->bind_tex_image(dpy, drawable, buffer, attrib_list); @@ -2355,7 +2355,7 @@ __glXReleaseTexImageEXT(Display * dpy, GLXDrawable drawable, int buffer) { struct glx_context *gc = __glXGetCurrentContext(); - if (gc == NULL || gc->vtable->release_tex_image == NULL) + if (gc == NULL || gc->vtable == NULL || gc->vtable->release_tex_image == NULL) return; gc->vtable->release_tex_image(dpy, drawable, buffer); -- cgit v1.2.3