From ad0e48a8b82a679f1d2836254ef33320e7162733 Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Date: Sat, 6 Oct 2012 00:42:32 +0200
Subject: [PATCH] Add missing file image_format.h, and add grayscale support.

---
 image_format.h | 26 ++++++++++++++++++++++++++
 input.cpp      |  3 +++
 2 files changed, 29 insertions(+)
 create mode 100644 image_format.h

diff --git a/image_format.h b/image_format.h
new file mode 100644
index 0000000..346cdef
--- /dev/null
+++ b/image_format.h
@@ -0,0 +1,26 @@
+#ifndef _IMAGE_FORMAT_H
+#define _IMAGE_FORMAT_H 1
+
+enum MovitPixelFormat { FORMAT_RGB, FORMAT_RGBA, FORMAT_BGR, FORMAT_BGRA, FORMAT_GRAYSCALE };
+
+enum ColorSpace {
+	COLORSPACE_sRGB = 0,
+	COLORSPACE_REC_709 = 0,  // Same as sRGB.
+	COLORSPACE_REC_601_525 = 1,
+	COLORSPACE_REC_601_625 = 2,
+};
+
+enum GammaCurve {
+	GAMMA_LINEAR = 0,
+	GAMMA_sRGB = 1,
+	GAMMA_REC_601 = 2,
+	GAMMA_REC_709 = 2,  // Same as Rec. 601.
+};
+
+struct ImageFormat {
+	MovitPixelFormat pixel_format;
+	ColorSpace color_space;
+	GammaCurve gamma_curve;
+};
+
+#endif  // !defined(_IMAGE_FORMAT_H)
diff --git a/input.cpp b/input.cpp
index 453620c..cf0210c 100644
--- a/input.cpp
+++ b/input.cpp
@@ -41,6 +41,9 @@ void Input::finalize()
 	} else if (image_format.pixel_format == FORMAT_BGRA) {
 		format = GL_BGRA;
 		bytes_per_pixel = 4;
+	} else if (image_format.pixel_format == FORMAT_GRAYSCALE) {
+		format = GL_LUMINANCE;
+		bytes_per_pixel = 1;
 	} else {
 		assert(false);
 	}
-- 
2.39.2