From efb0417040f4bdd55cf07dd8f54ecd4fc92c1286 Mon Sep 17 00:00:00 2001 From: Peter Clifton Date: Tue, 9 Nov 2010 22:00:36 +0000 Subject: intel: Add assert check for blitting alignment. Also fixup code comment to reflect that the GPU requires DWORD alignment, but in this case does not actually pass the value "in DWORDs" as I previously stated. --- src/mesa/drivers/dri/intel/intel_blit.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'src/mesa/drivers/dri') diff --git a/src/mesa/drivers/dri/intel/intel_blit.c b/src/mesa/drivers/dri/intel/intel_blit.c index 7118898830..c2917e9b07 100644 --- a/src/mesa/drivers/dri/intel/intel_blit.c +++ b/src/mesa/drivers/dri/intel/intel_blit.c @@ -483,8 +483,8 @@ intel_emit_linear_blit(struct intel_context *intel, /* Blits are in a different ringbuffer so we don't use them. */ assert(intel->gen < 6); - /* The pitch hits the GPU as a is a signed value, IN DWORDs. - * But we want width to match pitch. Max width is (1 << 15 - 1), + /* The pitch given to the GPU must be DWORD aligned, and + * we want width to match pitch. Max width is (1 << 15 - 1), * rounding that down to the nearest DWORD is 1 << 15 - 4 */ pitch = MIN2(size, (1 << 15) - 4); @@ -502,6 +502,7 @@ intel_emit_linear_blit(struct intel_context *intel, dst_offset += pitch * height; size -= pitch * height; assert (size < (1 << 15)); + assert ((size & 3) == 0); /* Pitch must be DWORD aligned */ if (size != 0) { ok = intelEmitCopyBlit(intel, 1, size, src_bo, src_offset, I915_TILING_NONE, -- cgit v1.2.3