1 files changed, 96 insertions, 0 deletions
diff --git a/libdimension/model/pigments/pigment_map.c b/libdimension/model/pigments/pigment_map.c
new file mode 100644
index 0000000..a74a66a
--- /dev/null
+++ b/libdimension/model/pigments/pigment_map.c
@@ -0,0 +1,96 @@
+/*************************************************************************
+ * Copyright (C) 2010-2014 Tavian Barnes <tavianator@tavianator.com>     *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension 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.                       *
+ *                                                                       *
+ * The Dimension 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 program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+/**
+ * @file
+ * Pigment-mapped pigment patterns.
+ */
+
+#include "dimension/model.h"
+
+/// Initialize a pigment in a pigment map.
+static void
+dmnsn_initialize_mapped_pigment(void *ptr)
+{
+  dmnsn_pigment **pigment = ptr;
+  dmnsn_pigment_initialize(*pigment);
+}
+
+dmnsn_map *
+dmnsn_new_pigment_map(dmnsn_pool *pool)
+{
+  return dmnsn_new_map(pool, sizeof(dmnsn_pigment *));
+}
+
+/// Pigment map type.
+typedef struct dmnsn_pigment_map {
+  dmnsn_pigment pigment;
+  dmnsn_pattern *pattern;
+  dmnsn_map *map;
+  dmnsn_pigment_map_flags flags;
+} dmnsn_pigment_map;
+
+/// pigment_map pigment callback.
+static dmnsn_tcolor
+dmnsn_pigment_map_pigment_fn(const dmnsn_pigment *pigment, dmnsn_vector v)
+{
+  const dmnsn_pigment_map *pigment_map = (const dmnsn_pigment_map *)pigment;
+  double n;
+  dmnsn_pigment *pigment1, *pigment2;
+  dmnsn_map_evaluate(pigment_map->map,
+                     dmnsn_pattern_value(pigment_map->pattern, v),
+                     &n, &pigment1, &pigment2);
+  dmnsn_tcolor color1 = dmnsn_pigment_evaluate(pigment1, v);
+  dmnsn_tcolor color2 = dmnsn_pigment_evaluate(pigment2, v);
+
+  if (pigment_map->flags == DMNSN_PIGMENT_MAP_SRGB) {
+    color1.c = dmnsn_color_to_sRGB(color1.c);
+    color2.c = dmnsn_color_to_sRGB(color2.c);
+  }
+  dmnsn_tcolor ret = dmnsn_tcolor_gradient(color1, color2, n);
+  if (pigment_map->flags == DMNSN_PIGMENT_MAP_SRGB) {
+    ret.c = dmnsn_color_from_sRGB(ret.c);
+  }
+
+  return ret;
+}
+
+/// pigment_map initialization callback.
+static void
+dmnsn_pigment_map_initialize_fn(dmnsn_pigment *pigment)
+{
+  dmnsn_pigment_map *pigment_map = (dmnsn_pigment_map *)pigment;
+  dmnsn_map_apply(pigment_map->map, dmnsn_initialize_mapped_pigment);
+}
+
+dmnsn_pigment *
+dmnsn_new_pigment_map_pigment(dmnsn_pool *pool, dmnsn_pattern *pattern, dmnsn_map *map, dmnsn_pigment_map_flags flags)
+{
+  dmnsn_pigment_map *pigment_map = DMNSN_PALLOC(pool, dmnsn_pigment_map);
+  pigment_map->pattern = pattern;
+  pigment_map->map = map;
+  pigment_map->flags = flags;
+
+  dmnsn_pigment *pigment = &pigment_map->pigment;
+  dmnsn_init_pigment(pigment);
+  pigment->pigment_fn = dmnsn_pigment_map_pigment_fn;
+  pigment->initialize_fn = dmnsn_pigment_map_initialize_fn;
+  return pigment;
+}