Missing pigment_map.c.

1 files changed, 108 insertions, 0 deletions

diff --git a/libdimension/pigment_map.c b/libdimension/pigment_map.c
new file mode 100644
index 0000000..8fe825d
--- /dev/null
+++ b/libdimension/pigment_map.c
@@ -0,0 +1,108 @@
+/*************************************************************************
+ * Copyright (C) 2010 Tavian Barnes <tavianator@gmail.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.h"
+
+/** Initialize a pigment in a pigment map. */
+static void
+dmnsn_initialize_mapped_pigment(void *ptr)
+{
+  dmnsn_pigment **pigment = ptr;
+  dmnsn_initialize_pigment(*pigment);
+}
+
+/** Free a pigment in a pigment map. */
+static void
+dmnsn_delete_mapped_pigment(void *ptr)
+{
+  dmnsn_pigment **pigment = ptr;
+  dmnsn_delete_pigment(*pigment);
+}
+
+dmnsn_map *
+dmnsn_new_pigment_map()
+{
+  dmnsn_map *pigment_map = dmnsn_new_map(sizeof(dmnsn_pigment *));
+  pigment_map->free_fn = &dmnsn_delete_mapped_pigment;
+  return pigment_map;
+}
+
+/** Payload for a pigment_map pigment. */
+typedef struct dmnsn_pigment_map_payload {
+  dmnsn_pattern *pattern;
+  dmnsn_map *map;
+} dmnsn_pigment_map_payload;
+
+/** Free a pigment_map payload. */
+static void
+dmnsn_delete_pigment_map_payload(void *ptr)
+{
+  dmnsn_pigment_map_payload *payload = ptr;
+  dmnsn_delete_map(payload->map);
+  dmnsn_delete_pattern(payload->pattern);
+  dmnsn_free(payload);
+}
+
+/** pigment_map pigment callback. */
+static dmnsn_color
+dmnsn_pigment_map_pigment_fn(const dmnsn_pigment *pigment, dmnsn_vector v)
+{
+  const dmnsn_pigment_map_payload *payload = pigment->ptr;
+  double n;
+  dmnsn_pigment *pigment1, *pigment2;
+  dmnsn_evaluate_map(payload->map, dmnsn_pattern_value(payload->pattern, v),
+                     &n, &pigment1, &pigment2);
+  dmnsn_color color1 = (*pigment1->pigment_fn)(pigment1, v);
+  dmnsn_color color2 = (*pigment2->pigment_fn)(pigment2, v);
+  return dmnsn_color_gradient(color1, color2, n);
+}
+
+/** pigment_map initialization callback. */
+static void
+dmnsn_pigment_map_initialize_fn(dmnsn_pigment *pigment)
+{
+  dmnsn_pigment_map_payload *payload = pigment->ptr;
+  payload->pattern->trans = dmnsn_matrix_mul(pigment->trans,
+                                             payload->pattern->trans);
+  dmnsn_initialize_pattern(payload->pattern);
+  dmnsn_map_apply(payload->map, &dmnsn_initialize_mapped_pigment);
+}
+
+dmnsn_pigment *
+dmnsn_new_pigment_map_pigment(dmnsn_pattern *pattern, dmnsn_map *map)
+{
+  dmnsn_pigment *pigment = dmnsn_new_pigment();
+
+  dmnsn_pigment_map_payload *payload
+    = dmnsn_malloc(sizeof(dmnsn_pigment_map_payload));
+  payload->pattern = pattern;
+  payload->map     = map;
+
+  pigment->pigment_fn    = &dmnsn_pigment_map_pigment_fn;
+  pigment->initialize_fn = &dmnsn_pigment_map_initialize_fn;
+  pigment->free_fn       = &dmnsn_delete_pigment_map_payload;
+  pigment->ptr           = payload;
+  return pigment;
+}