1 files changed, 82 insertions, 0 deletions
diff --git a/xicc/xcam.h b/xicc/xcam.h
new file mode 100644
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+++ b/xicc/xcam.h
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+
+#ifndef _XCAM_H_
+
+/* 
+ * Abstract interface to color appearance model transforms.
+ * 
+ * This is to allow the rest of Argyll to use a default CAM.
+ * 
+ * Author:  Graeme W. Gill
+ * Date:    25/7/2004
+ * Version: 1.00
+ *
+ * Copyright 2004 Graeme W. Gill
+ * Please refer to COPYRIGHT file for details.
+ * This material is licenced under the GNU AFFERO GENERAL PUBLIC LICENSE Version 3 :-
+ * see the License.txt file for licencing details.
+ */
+
+/* ---------------------------------- */
+
+/* The range of CAMs supported */
+typedef enum {
+	cam_default    = 0,		/* Default CAM */
+	cam_CIECAM97s3 = 1,		/* CIECAM97, version 3 */
+	cam_CIECAM02   = 2		/* CIECAM02 */
+} icxCAM;
+
+/* The enumerated viewing conditions: */
+typedef enum {
+	vc_notset    = -1,
+	vc_none      = 0,	/* Figure out from Lv and La */
+	vc_dark      = 1,
+	vc_dim       = 2,
+	vc_average   = 3,
+	vc_cut_sheet = 4	/* Transparencies on a Light Box */
+} ViewingCondition;
+
+struct _icxcam {
+/* Public: */
+	void (*del)(struct _icxcam *s);	/* We're done with it */
+
+	/* Always returns 0 */
+	int (*set_view)(
+		struct _icxcam *s,
+		ViewingCondition Ev,	/* Enumerated Viewing Condition */
+		double Wxyz[3],	/* Reference/Adapted White XYZ (Y scale 1.0) */
+		double La,		/* Adapting/Surround Luminance cd/m^2 */
+		double Yb,		/* Luminance of Background relative to reference white (range 0.0 .. 1.0) */
+		double Lv,		/* Luminance of white in the Viewing/Scene/Image field (cd/m^2) */
+						/* Ignored if Ev is set */
+		double Yf,		/* Flare as a fraction of the reference white (range 0.0 .. 1.0) */
+		double Fxyz[3],	/* The Flare white coordinates (typically the Ambient color) */
+		int hk			/* Flag, NZ to use Helmholtz-Kohlraush effect */
+	);
+
+	/* Conversions */
+	int (*XYZ_to_cam)(struct _icxcam *s, double *out, double *in);
+	int (*cam_to_XYZ)(struct _icxcam *s, double *out, double *in);
+
+	/* Debug */
+	void (*settrace)(struct _icxcam *s, int tracev);
+
+/* Private: */
+	icxCAM tag;			/* Type */
+	void *p;			/* Pointer to implementation */
+	double Wxyz[3];		/* Copy of Wxyz */
+
+}; typedef struct _icxcam icxcam;
+
+/* Create a new CAM conversion object */
+icxcam *new_icxcam(icxCAM which);
+
+/* Return the default CAM */
+icxCAM icxcam_default();	
+
+/* Return a string describing the given CAM */
+char *icxcam_description(icxCAM ct); 
+
+#define _XCAM_H_
+#endif /* _XCAM_H_ */
+
+