From aff7c5e78ab133866a90f67613508735c9b75094 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Mon, 3 Mar 2014 09:59:45 -0700 Subject: [PATCH] mesa: don't call ctx->Driver.ClearBufferSubData() if size==0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Fixes failed assertion when trying to map zero-length region. https://bugs.freedesktop.org/show_bug.cgi?id=75660 Cc: "10.0" "10.1" Reviewed-by: Marek Olšák --- src/mesa/main/bufferobj.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c index 237b49cb1c7..9ef55a784a1 100644 --- a/src/mesa/main/bufferobj.c +++ b/src/mesa/main/bufferobj.c @@ -1508,8 +1508,10 @@ _mesa_ClearBufferSubData(GLenum target, GLenum internalformat, if (data == NULL) { /* clear to zeros, per the spec */ - ctx->Driver.ClearBufferSubData(ctx, offset, size, - NULL, 0, bufObj); + if (size > 0) { + ctx->Driver.ClearBufferSubData(ctx, offset, size, + NULL, 0, bufObj); + } return; } @@ -1519,8 +1521,10 @@ _mesa_ClearBufferSubData(GLenum target, GLenum internalformat, return; } - ctx->Driver.ClearBufferSubData(ctx, offset, size, - clearValue, clearValueSize, bufObj); + if (size > 0) { + ctx->Driver.ClearBufferSubData(ctx, offset, size, + clearValue, clearValueSize, bufObj); + } } -- 2.30.2