diff options
| -rw-r--r-- | src/mesa/main/draw.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/mesa/main/draw.c b/src/mesa/main/draw.c index 215d0dfff1b..915c24b6fac 100644 --- a/src/mesa/main/draw.c +++ b/src/mesa/main/draw.c @@ -1277,8 +1277,11 @@ _mesa_validated_multidrawelements(struct gl_context *ctx, GLenum mode, } if (ctx->Const.MultiDrawWithUserIndices) { - /* Check whether prim[i].start would overflow. */ - if (((max_index_ptr - min_index_ptr) >> ib.index_size_shift) > UINT_MAX) + /* "max_index_ptr - min_index_ptr >> index_size_shift" is stored + * in prims[i].start. The driver will multiply it later by index_size + * so make sure the final value won't overflow. + */ + if (max_index_ptr - min_index_ptr > UINT32_MAX) fallback = true; } else { /* If the index buffer isn't in a VBO, then treating the application's |