X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=image_format.h;h=7ca334c36016e4324f0cc75fac9ab8fe87af5cb3;hp=55aa8d4989b26233d2688243e0370f08c46e4552;hb=9224f01a362117deef6f1140c6802fde256fb168;hpb=e655afd53f2e56938bd4e7f72640eff56ef4a1ee

diff --git a/image_format.h b/image_format.h
index 55aa8d4..7ca334c 100644
--- a/image_format.h
+++ b/image_format.h
@@ -1,14 +1,34 @@
-#ifndef _IMAGE_FORMAT_H
-#define _IMAGE_FORMAT_H 1
+#ifndef _MOVIT_IMAGE_FORMAT_H
+#define _MOVIT_IMAGE_FORMAT_H 1
 
-enum MovitPixelFormat { FORMAT_RGB, FORMAT_RGBA, FORMAT_BGR, FORMAT_BGRA, FORMAT_GRAYSCALE };
+// Note: Movit's internal processing formats do not have enough
+// accuracy to support 12-bit input, so if you want to use Rec. 2020,
+// you should probably stick to 10-bit, or accept somewhat reduced
+// accuracy for 12-bit. Input depths above 8 bits are also generally
+// less tested.
+//
+// We also only support “conventional non-constant luminance” for Rec. 2020,
+// where Y' is derived from R'G'B' instead of RGB, since this is the same
+// system as used in Rec. 601 and 709.
 
-enum ColorSpace {
+enum MovitPixelFormat {
+	FORMAT_RGB,
+	FORMAT_RGBA_PREMULTIPLIED_ALPHA,
+	FORMAT_RGBA_POSTMULTIPLIED_ALPHA,
+	FORMAT_BGR,
+	FORMAT_BGRA_PREMULTIPLIED_ALPHA,
+	FORMAT_BGRA_POSTMULTIPLIED_ALPHA,
+	FORMAT_GRAYSCALE
+};
+
+enum Colorspace {
 	COLORSPACE_INVALID = -1,  // For internal use.
 	COLORSPACE_sRGB = 0,
 	COLORSPACE_REC_709 = 0,  // Same as sRGB.
 	COLORSPACE_REC_601_525 = 1,
 	COLORSPACE_REC_601_625 = 2,
+	COLORSPACE_XYZ = 3,  // Mostly useful for testing and debugging.
+	COLORSPACE_REC_2020 = 4,
 };
 
 enum GammaCurve {
@@ -17,16 +37,19 @@ enum GammaCurve {
 	GAMMA_sRGB = 1,
 	GAMMA_REC_601 = 2,
 	GAMMA_REC_709 = 2,  // Same as Rec. 601.
+	GAMMA_REC_2020_10_BIT = 2,  // Same as Rec. 601.
+	GAMMA_REC_2020_12_BIT = 3,
 };
 
 enum YCbCrLumaCoefficients {
 	YCBCR_REC_601 = 0,
 	YCBCR_REC_709 = 1,
+	YCBCR_REC_2020 = 2,
 };
 
 struct ImageFormat {
-	ColorSpace color_space;
+	Colorspace color_space;
 	GammaCurve gamma_curve;
 };
 
-#endif  // !defined(_IMAGE_FORMAT_H)
+#endif  // !defined(_MOVIT_IMAGE_FORMAT_H)