Add an optimization for full width fills on some hardware

If we know the rowstride is the same width as the frame buffer
then we can memcpy multiple rows at one time.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/libply/ply-frame-buffer.c b/src/libply/ply-frame-buffer.c
index 288f7e7..dbf6f11 100644
--- a/src/libply/ply-frame-buffer.c
+++ b/src/libply/ply-frame-buffer.c
@@ -188,6 +188,12 @@ flush_xrgb32 (ply_frame_buffer_t *buffer)
   dst = &buffer->map_address[(y1 * buffer->row_stride + x1) * 4];
   src = (char *) &buffer->shadow_buffer[y1 * buffer->row_stride + x1];
 
+  if (buffer->area_to_flush.width == buffer->row_stride)
+    {
+      memcpy (dst, src, buffer->area_to_flush.width * buffer->area_to_flush.height * 4);
+      return;
+    }
+
   for (y = y1; y < y2; y++)
     {
       memcpy (dst, src, buffer->area_to_flush.width * 4);