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-rw-r--r--src/mesa/drivers/dri/intel/intel_blit.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_blit.c b/src/mesa/drivers/dri/intel/intel_blit.c
index a74e21720fb..71188988306 100644
--- a/src/mesa/drivers/dri/intel/intel_blit.c
+++ b/src/mesa/drivers/dri/intel/intel_blit.c
@@ -483,8 +483,11 @@ 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 is a signed value. */
- pitch = MIN2(size, (1 << 15) - 1);
+ /* 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),
+ * rounding that down to the nearest DWORD is 1 << 15 - 4
+ */
+ pitch = MIN2(size, (1 << 15) - 4);
height = size / pitch;
ok = intelEmitCopyBlit(intel, 1,
pitch, src_bo, src_offset, I915_TILING_NONE,