Without these we can find ourselves in _mesa_load_state_parameters()
computing derived lighting/material values whhen the current material
properties haven't been updated from the VBO.
This may be a somewhat wide-spread problem that needs more attention...
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+ FLUSH_CURRENT(ctx, 0);
+
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glClear 0x%x\n", mask);
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+ FLUSH_CURRENT(ctx, 0);
+
if (width < 0 || height < 0) {
_mesa_error( ctx, GL_INVALID_VALUE,
"glReadPixels(width=%d height=%d)", width, height );