From 03cc31031315059a80d12485a402ea2a8731dc8a Mon Sep 17 00:00:00 2001 From: Paul Berry Date: Thu, 30 May 2013 07:08:07 -0700 Subject: [PATCH] intel: make intel_flush_front safe to call during initial MakeCurrent The patch that follows will fix a bug that prevents intel_flush_front() from being called often enough. In doing so, it will create a situation where intel_flush_front() is called during the initial call to glXMakeCurrent(). In this circumstance, ctx->DrawBuffer hasn't been initialized yet and is NULL. Fortunately, intel->front_buffer_dirty is false, so intel_flush_front() doesn't actually need to do anything. To avoid a segfault, swap the order of terms in intel_flush_front()'s if statement. Reviewed-by: Chad Versace Reviewed-by: Anuj Phogat --- src/mesa/drivers/dri/intel/intel_context.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c index 8c88b3ca2f7..54d0a69edc7 100644 --- a/src/mesa/drivers/dri/intel/intel_context.c +++ b/src/mesa/drivers/dri/intel/intel_context.c @@ -132,7 +132,7 @@ intel_flush_front(struct gl_context *ctx) __DRIdrawable *driDrawable = driContext->driDrawablePriv; __DRIscreen *const screen = intel->intelScreen->driScrnPriv; - if (_mesa_is_winsys_fbo(ctx->DrawBuffer) && intel->front_buffer_dirty) { + if (intel->front_buffer_dirty && _mesa_is_winsys_fbo(ctx->DrawBuffer)) { if (screen->dri2.loader->flushFrontBuffer != NULL && driDrawable && driDrawable->loaderPrivate) {