# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1560492255 -10800
# Node ID b858ade0fb0b88da2d1ecd529656b60b9616aa97
# Parent  a8b4e9c9f337399a87429ef3c64f6179d8a29964
Add some comments.

diff -r a8b4e9c9f337 -r b858ade0fb0b tools/libgfx.h
--- a/tools/libgfx.h	Fri Jun 14 08:33:18 2019 +0300
+++ b/tools/libgfx.h	Fri Jun 14 09:04:15 2019 +0300
@@ -114,9 +114,11 @@
     int  pixfmt;              // Target color format DM_PIXFMT_*
     int  scaleX, scaleY;      // Integer scale factors (1..)
 
-    int  nplanes, bpp, mask;  // number of planes, bits per PLANE, masking
+    int  nplanes, bpp;        // number of bitplanes to use, bits per PLANE to use
+    int  mask;                // masking
     BOOL planar;              // use planar format if the format supports it
     int  compression;         // Use compression/compression level (0 = none, 9 = max)
+                              // (not all formats support any, or more than on/off compression)
 } DMImageWriteSpec;