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-rw-r--r--src/gallium/drivers/svga/svga_state_vs.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/gallium/drivers/svga/svga_state_vs.c b/src/gallium/drivers/svga/svga_state_vs.c
index 3cb0cdb9697..1d140bd03a1 100644
--- a/src/gallium/drivers/svga/svga_state_vs.c
+++ b/src/gallium/drivers/svga/svga_state_vs.c
@@ -222,7 +222,11 @@ struct svga_tracked_state svga_hw_vs =
};
-/***********************************************************************
+/**
+ * This function handles the special case of vertex attributes
+ * with stride=0. Basically, copy those values into the constant
+ * buffer and modify the vertex shader to get the values from the
+ * constant buffer rather than a vertex array.
*/
static enum pipe_error
update_zero_stride( struct svga_context *svga,
@@ -269,7 +273,7 @@ update_zero_stride( struct svga_context *svga,
mapped_buffer = pipe_buffer_map_range(&svga->pipe,
vbuffer->buffer,
- vel->src_offset,
+ vel->src_offset + vbuffer->buffer_offset,
util_format_get_blocksize(vel->src_format),
PIPE_TRANSFER_READ,
&transfer);