1 files changed, 110 insertions, 0 deletions
diff --git a/babl/base/babl-trc.h b/babl/base/babl-trc.h
new file mode 100644
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+++ b/babl/base/babl-trc.h
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+/* babl - dynamically extendable universal pixel conversion library.
+ * Copyright (C) 2017, Øyvind Kolås and others.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef _BABL_TRC_H
+#define _BABL_TRC_H
+
+#include <math.h>
+#include <string.h>
+#include "base/util.h"
+#include "babl-polynomial.h"
+
+BABL_CLASS_DECLARE (trc);
+
+typedef enum {BABL_TRC_LINEAR,
+              BABL_TRC_FORMULA_GAMMA,
+              BABL_TRC_SRGB,
+              BABL_TRC_FORMULA_SRGB,
+              BABL_TRC_LUT,
+              BABL_TRC_FORMULA_CIE}
+BablTRCType;
+
+typedef struct
+{
+  BablInstance     instance;
+  BablTRCType      type;
+  int              lut_size;
+  double           gamma;
+  float            rgamma;
+  float          (*fun_to_linear)(const Babl *trc, float val);
+  float          (*fun_from_linear)(const Babl *trc, float val);
+
+  void           (*fun_to_linear_buf)(const Babl *trc,
+                                      const float *in,
+                                      float *out,
+                                      int in_gap,
+                                      int out_gap,
+                                      int components,
+                                      int count);
+  void           (*fun_from_linear_buf)(const Babl *trc,
+                                      const float *in,
+                                      float *out,
+                                      int in_gap,
+                                      int out_gap,
+                                      int components,
+                                      int count);
+  BablPolynomial   poly_gamma_to_linear;
+  float            poly_gamma_to_linear_x0;
+  float            poly_gamma_to_linear_x1;
+  BablPolynomial   poly_gamma_from_linear;
+  float            poly_gamma_from_linear_x0;
+  float            poly_gamma_from_linear_x1;
+  float           *lut;
+  float           *inv_lut;
+  char             name[128];
+  int valid_u8_lut;
+  float u8_lut[256];
+} BablTRC;
+
+static inline void babl_trc_from_linear_buf (const Babl *trc_,
+                                             const float *in, float *out,
+                                             int in_gap, int out_gap,
+                                             int components,
+                                             int count)
+{
+  BablTRC *trc = (void*)trc_;
+  trc->fun_from_linear_buf (trc_, in, out, in_gap, out_gap, components, count);
+}
+
+static inline void babl_trc_to_linear_buf (const Babl *trc_,
+                                           const float *in, float *out,
+                                           int in_gap, int out_gap,
+                                           int components,
+                                           int count)
+{
+  BablTRC *trc = (void*)trc_;
+  trc->fun_to_linear_buf (trc_, in, out, in_gap, out_gap, components, count);
+}
+
+static inline float babl_trc_from_linear (const Babl *trc_, float value)
+{
+  BablTRC *trc = (void*)trc_;
+  return trc->fun_from_linear (trc_, value);
+}
+
+static inline float babl_trc_to_linear (const Babl *trc_, float value)
+{
+  BablTRC *trc = (void*)trc_;
+  return trc->fun_to_linear (trc_, value);
+}
+
+void
+babl_trc_class_init_generic (void);
+
+
+#endif