# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1527206751 -10800
# Node ID 58ef0124394d7a065713b1c1a3f4f490590b73d3
# Parent  710961d02b8a449968ba6a99265e3144cd92555b
Add some comments.

diff -r 710961d02b8a -r 58ef0124394d tools/lib64gfx.h
--- a/tools/lib64gfx.h	Fri May 25 02:23:23 2018 +0300
+++ b/tools/lib64gfx.h	Fri May 25 03:05:51 2018 +0300
@@ -50,23 +50,22 @@
 #define DM_GET_ADDR_HI(addr) (((addr) >> 8) & 0xff)
 
 
-// Different supported C64 bitmap "modes"
+// Different supported flags/modes
 enum
 {
-    D64_FMT_HIRES        = 0x0000,
-    D64_FMT_MC           = 0x0001,
-    D64_FMT_ILACE        = 0x0002,
-    D64_FMT_FLI          = 0x0004,
-    D64_FMT_CHAR         = 0x0008,
-
-    D64_FMT_MODE_MASK    = 0x000f,
-
+    D64_FMT_HIRES        = 0x0000, // Hi-res
+    D64_FMT_MC           = 0x0001, // MultiColor
+    D64_FMT_ILACE        = 0x0002, // Interlace
+    D64_FMT_FLI          = 0x0004, // FLI
+    D64_FMT_CHAR         = 0x0008, // Character mode
 };
 
+
+// Different types of interlace
 enum
 {
-    D64_ILACE_RES,
-    D64_ILACE_COLOR,
+    D64_ILACE_RES        = 0x0001, // Interlace doubles resolution
+    D64_ILACE_COLOR      = 0x0002, // Uses color mixing
 };
 
 
@@ -203,6 +202,9 @@
 } DMC64ImageFormat;
 
 
+//
+// Compression types
+//
 #define DM_COMP_RLE_MARKER1   1
 #define DM_COMP_RLE_MARKER2   2
 #define DM_COMP_RLE_MASK      3