initial

1 files changed, 17 insertions, 0 deletions

diff --git a/bpp.s b/bpp.s
new file mode 100644
index 0000000..e775e97
--- /dev/null
+++ b/bpp.s
@@ -0,0 +1,17 @@
+.ifndef __BPP__
+.equ __BPP__, 1
+
+.ifndef BYTES_PER_PIXEL
+	.error "BYTES_PER_PIXEL not defined"
+.else
+	.if BYTES_PER_PIXEL == 4
+		.equ BPP_SHIFT, 2
+		.equ FULLBPP, 1
+	.elseif BYTES_PER_PIXEL == 2
+		.equ BPP_SHIFT, 1
+	.else
+		.error "BYTES_PER_PIXEL must be 2 or 4"
+	.endif
+.endif
+
+.endif