From a1488eec38d5a76f4e04245a6ce8302444800805 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Mon, 31 Oct 2011 16:59:05 -0700 Subject: [PATCH] intel: Add safety asserts for the blit engine's pitch alignment requirements. Reviewed-by: Brian Paul --- src/mesa/drivers/dri/intel/intel_blit.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/mesa/drivers/dri/intel/intel_blit.c b/src/mesa/drivers/dri/intel/intel_blit.c index def226c16b7..8d7693d7b88 100644 --- a/src/mesa/drivers/dri/intel/intel_blit.c +++ b/src/mesa/drivers/dri/intel/intel_blit.c @@ -146,6 +146,12 @@ intelEmitCopyBlit(struct intel_context *intel, src_pitch *= cpp; dst_pitch *= cpp; + /* Blit pitch must be dword-aligned. Otherwise, the hardware appears to drop + * the low bits. + */ + assert(src_pitch % 4 == 0); + assert(dst_pitch % 4 == 0); + /* For big formats (such as floating point), do the copy using 32bpp and * multiply the coordinates. */ -- 2.30.2