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.

diff --git a/src/libply/ply-frame-buffer.c b/src/libply/ply-frame-buffer.c
index 288f7e7668eaa50a2d82e7589430c95adeb82590..dbf6f1113460d125c0d1dd630d6337370483f755 100644 (file)
--- 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);