Remove color_maps.

6 files changed, 109 insertions, 169 deletions

diff --git a/libdimension/Makefile.am b/libdimension/Makefile.am
index b042fc9..31db52a 100644
--- a/libdimension/Makefile.am
+++ b/libdimension/Makefile.am
@@ -68,7 +68,6 @@ libdimension_la_SOURCES = $(nobase_include_HEADERS)                            \
                           canvas_pigment.c                                     \
                           checker.c                                            \
                           color.c                                              \
-                          color_map.c                                          \
                           compiler.h                                           \
                           cone.c                                               \
                           cube.c                                               \
diff --git a/libdimension/color_map.c b/libdimension/color_map.c
deleted file mode 100644
index 654fe97..0000000
--- a/libdimension/color_map.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/*************************************************************************
- * Copyright (C) 2010 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
- * Color-mapped pigment patterns.
- */
-
-#include "dimension.h"
-
-dmnsn_map *
-dmnsn_new_color_map(void)
-{
-  return dmnsn_new_map(sizeof(dmnsn_color));
-}
-
-/** Payload for a color_map pigment. */
-typedef struct dmnsn_color_map_payload {
-  dmnsn_pattern *pattern;
-  dmnsn_map *map;
-  dmnsn_pigment_map_flags flags;
-} dmnsn_color_map_payload;
-
-/** Free a color_map payload. */
-static void
-dmnsn_delete_color_map_payload(void *ptr)
-{
-  dmnsn_color_map_payload *payload = ptr;
-  dmnsn_delete_map(payload->map);
-  dmnsn_delete_pattern(payload->pattern);
-  dmnsn_free(payload);
-}
-
-/** color_map pigment callback. */
-static dmnsn_color
-dmnsn_color_map_pigment_fn(const dmnsn_pigment *pigment, dmnsn_vector v)
-{
-  const dmnsn_color_map_payload *payload = pigment->ptr;
-  double n;
-  dmnsn_color color1, color2;
-  dmnsn_evaluate_map(payload->map, dmnsn_pattern_value(payload->pattern, v),
-                     &n, &color1, &color2);
-
-  if (payload->flags == DMNSN_PIGMENT_MAP_SRGB) {
-    color1 = dmnsn_color_to_sRGB(color1);
-    color2 = dmnsn_color_to_sRGB(color2);
-  }
-  dmnsn_color ret = dmnsn_color_gradient(color1, color2, n);
-  if (payload->flags == DMNSN_PIGMENT_MAP_SRGB) {
-    ret = dmnsn_color_from_sRGB(ret);
-  }
-
-  return ret;
-}
-
-/** color_map initialization callback. */
-static void
-dmnsn_color_map_initialize_fn(dmnsn_pigment *pigment)
-{
-  dmnsn_color_map_payload *payload = pigment->ptr;
-  dmnsn_initialize_pattern(payload->pattern);
-}
-
-dmnsn_pigment *
-dmnsn_new_color_map_pigment(dmnsn_pattern *pattern, dmnsn_map *map,
-                            dmnsn_pigment_map_flags flags)
-{
-  dmnsn_pigment *pigment = dmnsn_new_pigment();
-
-  dmnsn_color_map_payload *payload
-    = dmnsn_malloc(sizeof(dmnsn_color_map_payload));
-  payload->pattern = pattern;
-  payload->map     = map;
-  payload->flags   = flags;
-
-  pigment->pigment_fn    = dmnsn_color_map_pigment_fn;
-  pigment->initialize_fn = dmnsn_color_map_initialize_fn;
-  pigment->free_fn       = dmnsn_delete_color_map_payload;
-  pigment->ptr           = payload;
-  return pigment;
-}
diff --git a/libdimension/dimension/map.h b/libdimension/dimension/map.h
index 80b48b6..b515518 100644
--- a/libdimension/dimension/map.h
+++ b/libdimension/dimension/map.h
@@ -20,7 +20,7 @@
 
 /**
  * @file
- * Generic maps (backend for color_maps, pigment_maps, etc.).
+ * Generic maps (backend for pigment_maps, etc.).
  */
 
 /** A map. */
@@ -44,8 +44,8 @@ dmnsn_map *dmnsn_new_map(size_t size);
 void dmnsn_delete_map(dmnsn_map *map);
 
 /**
- * Add an entry (a scalar-object pair) to a color map.
- * @param[in,out] map  The color map to add to.
+ * Add an entry (a scalar-object pair) to a map.
+ * @param[in,out] map  The map to add to.
  * @param[in]     n    The index of the entry.
  * @param[in]     obj  The value of the entry.
  */
diff --git a/libdimension/dimension/pigments.h b/libdimension/dimension/pigments.h
index 60dc658..56bba92 100644
--- a/libdimension/dimension/pigments.h
+++ b/libdimension/dimension/pigments.h
@@ -39,13 +39,7 @@ dmnsn_pigment *dmnsn_new_solid_pigment(dmnsn_color color);
 dmnsn_pigment *dmnsn_new_canvas_pigment(dmnsn_canvas *canvas);
 
 /**
- * Construct a color map.
- * @return An empty color map.
- */
-dmnsn_map *dmnsn_new_color_map(void);
-
-/**
- * pigment_map flags.
+ * Pigment map flags.
  */
 typedef enum dmnsn_pigment_map_flags {
   DMNSN_PIGMENT_MAP_REGULAR, /**< Calculate linear color gradients. */
@@ -53,23 +47,21 @@ typedef enum dmnsn_pigment_map_flags {
 } dmnsn_pigment_map_flags;
 
 /**
- * A color-mapped pigment.
- * @param[in,out] pattern  The pattern of the pigment.
- * @param[in,out] map      The color map to apply to the pattern.
- * @param[in]     flags    Gradient flags
- * @return A pigment mapping the pattern to color values.
- */
-dmnsn_pigment *dmnsn_new_color_map_pigment(dmnsn_pattern *pattern,
-                                           dmnsn_map *map,
-                                           dmnsn_pigment_map_flags flags);
-
-/**
  * Construct a pigment map.
  * @return An empty pigment map.
  */
 dmnsn_map *dmnsn_new_pigment_map(void);
 
 /**
+ * Add a raw color to a pigment map.
+ * Shorthand for creating a solid pigment and adding it manually.
+ * @param[in,out] map    The pigment map to add to.
+ * @param[in]     n      The index of the entry.
+ * @param[in]     color  The value of the entry.
+ */
+void dmnsn_pigment_map_add_color(dmnsn_map *map, double n, dmnsn_color color);
+
+/**
  * A pigment-mapped pigment.
  * @param[in,out] pattern  The pattern of the pigment.
  * @param[in,out] map      The pigment map to apply to the pattern.
diff --git a/libdimension/pigment_map.c b/libdimension/pigment_map.c
index cf49649..4ffb129 100644
--- a/libdimension/pigment_map.c
+++ b/libdimension/pigment_map.c
@@ -56,6 +56,13 @@ typedef struct dmnsn_pigment_map_payload {
   dmnsn_pigment_map_flags flags;
 } dmnsn_pigment_map_payload;
 
+void
+dmnsn_pigment_map_add_color(dmnsn_map *map, double n, dmnsn_color color)
+{
+  dmnsn_pigment *pigment = dmnsn_new_solid_pigment(color);
+  dmnsn_add_map_entry(map, n, &pigment);
+}
+
 /** Free a pigment_map payload. */
 static void
 dmnsn_delete_pigment_map_payload(void *ptr)
diff --git a/libdimension/tests/render.c b/libdimension/tests/render.c
index a9d20d7..e9dff2a 100644
--- a/libdimension/tests/render.c
+++ b/libdimension/tests/render.c
@@ -22,15 +22,9 @@
 #include <stdlib.h>
 #include <stdio.h>
 
-/*
- * Test scene
- */
-static dmnsn_scene *
-dmnsn_new_test_scene(void)
+static void
+dmnsn_test_scene_set_defaults(dmnsn_scene *scene)
 {
-  /* Allocate a new scene */
-  dmnsn_scene *scene = dmnsn_new_scene();
-
   /* Default texture */
   scene->default_texture->pigment = dmnsn_new_solid_pigment(dmnsn_black);
   dmnsn_finish *default_finish = &scene->default_texture->finish;
@@ -43,9 +37,19 @@ dmnsn_new_test_scene(void)
     )
   );
 
-  /* Allocate a canvas */
+  /* Background color */
+  scene->background = dmnsn_clear;
+}
+
+static void
+dmnsn_test_scene_add_canvas(dmnsn_scene *scene)
+{
   scene->canvas = dmnsn_new_canvas(768, 480);
+}
 
+static void
+dmnsn_test_scene_add_camera(dmnsn_scene *scene)
+{
   /* Set up the transformation matrix for the perspective camera */
   dmnsn_matrix trans = dmnsn_scale_matrix(
     dmnsn_new_vector(
@@ -68,33 +72,38 @@ dmnsn_new_test_scene(void)
   /* Create a perspective camera */
   scene->camera = dmnsn_new_perspective_camera();
   scene->camera->trans = trans;
+}
 
-  /* Background color */
-  scene->background = dmnsn_clear;
-
-  /* Sky sphere */
+static void
+dmnsn_test_scene_add_sky_sphere(dmnsn_scene *scene)
+{
   scene->sky_sphere = dmnsn_new_sky_sphere();
   dmnsn_pattern *sky_gradient = dmnsn_new_gradient_pattern(dmnsn_y);
-  dmnsn_map *sky_gradient_color_map = dmnsn_new_color_map();
-  dmnsn_add_map_entry(sky_gradient_color_map, 0.0, &dmnsn_orange);
+  dmnsn_map *sky_gradient_pigment_map = dmnsn_new_pigment_map();
+  dmnsn_pigment_map_add_color(sky_gradient_pigment_map, 0.0, dmnsn_orange);
   dmnsn_color background = dmnsn_color_from_sRGB(
     dmnsn_new_color5(0.0, 0.1, 0.2, 0.1, 0.0)
   );
-  dmnsn_add_map_entry(sky_gradient_color_map, 0.35, &background);
-  dmnsn_pigment *sky_pigment
-    = dmnsn_new_color_map_pigment(sky_gradient, sky_gradient_color_map,
+  dmnsn_pigment_map_add_color(sky_gradient_pigment_map, 0.35, background);
+  dmnsn_pigment *sky_pigment =
+    dmnsn_new_pigment_map_pigment(sky_gradient, sky_gradient_pigment_map,
                                   DMNSN_PIGMENT_MAP_SRGB);
   dmnsn_array_push(scene->sky_sphere->pigments, &sky_pigment);
+}
 
-  /* Light source */
+static void
+dmnsn_test_scene_add_lights(dmnsn_scene *scene)
+{
   dmnsn_light *light = dmnsn_new_point_light(
     dmnsn_new_vector(-15.0, 20.0, 10.0),
     dmnsn_white
   );
   dmnsn_array_push(scene->lights, &light);
+}
 
-  /* Now make our objects */
-
+static void
+dmnsn_test_scene_add_hollow_cube(dmnsn_scene *scene)
+{
   dmnsn_object *cube = dmnsn_new_cube();
   cube->trans = dmnsn_rotation_matrix(
     dmnsn_new_vector(dmnsn_radians(45.0), 0.0, 0.0)
@@ -121,9 +130,13 @@ dmnsn_new_test_scene(void)
   sphere->texture->finish.specular = dmnsn_new_phong(0.2, 40.0);
   sphere->trans = dmnsn_scale_matrix(dmnsn_new_vector(1.25, 1.25, 1.25));
 
-  dmnsn_object *csg = dmnsn_new_csg_difference(cube, sphere);
-  dmnsn_array_push(scene->objects, &csg);
+  dmnsn_object *hollow_cube = dmnsn_new_csg_difference(cube, sphere);
+  dmnsn_array_push(scene->objects, &hollow_cube);
+}
 
+static void
+dmnsn_test_scene_add_spike(dmnsn_scene *scene)
+{
   dmnsn_array *arrow_array = dmnsn_new_array(sizeof(dmnsn_object *));
 
   dmnsn_object *cylinder = dmnsn_new_cone(0.1, 0.1, false);
@@ -141,17 +154,17 @@ dmnsn_new_test_scene(void)
   dmnsn_object *arrow = dmnsn_new_csg_union(arrow_array);
   dmnsn_delete_array(arrow_array);
   dmnsn_pattern *gradient = dmnsn_new_gradient_pattern(dmnsn_y);
-  dmnsn_map *gradient_color_map = dmnsn_new_color_map();
-  dmnsn_add_map_entry(gradient_color_map, 0.0,     &dmnsn_red);
-  dmnsn_add_map_entry(gradient_color_map, 1.0/6.0, &dmnsn_orange);
-  dmnsn_add_map_entry(gradient_color_map, 2.0/6.0, &dmnsn_yellow);
-  dmnsn_add_map_entry(gradient_color_map, 3.0/6.0, &dmnsn_green);
-  dmnsn_add_map_entry(gradient_color_map, 4.0/6.0, &dmnsn_blue);
-  dmnsn_add_map_entry(gradient_color_map, 5.0/6.0, &dmnsn_magenta);
-  dmnsn_add_map_entry(gradient_color_map, 1.0,     &dmnsn_red);
+  dmnsn_map *gradient_pigment_map = dmnsn_new_pigment_map();
+  dmnsn_pigment_map_add_color(gradient_pigment_map, 0.0,     dmnsn_red);
+  dmnsn_pigment_map_add_color(gradient_pigment_map, 1.0/6.0, dmnsn_orange);
+  dmnsn_pigment_map_add_color(gradient_pigment_map, 2.0/6.0, dmnsn_yellow);
+  dmnsn_pigment_map_add_color(gradient_pigment_map, 3.0/6.0, dmnsn_green);
+  dmnsn_pigment_map_add_color(gradient_pigment_map, 4.0/6.0, dmnsn_blue);
+  dmnsn_pigment_map_add_color(gradient_pigment_map, 5.0/6.0, dmnsn_magenta);
+  dmnsn_pigment_map_add_color(gradient_pigment_map, 1.0,     dmnsn_red);
   arrow->texture = dmnsn_new_texture();
-  arrow->texture->pigment
-    = dmnsn_new_color_map_pigment(gradient, gradient_color_map,
+  arrow->texture->pigment =
+    dmnsn_new_pigment_map_pigment(gradient, gradient_pigment_map,
                                   DMNSN_PIGMENT_MAP_SRGB);
 
   arrow->texture->trans =
@@ -189,9 +202,11 @@ dmnsn_new_test_scene(void)
     dmnsn_new_vector(dmnsn_radians(-45.0), 0.0, 0.0)
   );
   dmnsn_array_push(scene->objects, &spike);
+}
 
-  /* Triangle strip */
-
+static void
+dmnsn_test_scene_add_triangle_strip(dmnsn_scene *scene)
+{
   dmnsn_array *strip_array = dmnsn_new_array(sizeof(dmnsn_object *));
   dmnsn_vector a = dmnsn_zero;
   dmnsn_vector b = dmnsn_new_vector(0.0, sqrt(3.0)/2.0, 0.5);
@@ -222,32 +237,57 @@ dmnsn_new_test_scene(void)
   dmnsn_delete_array(strip_array);
   strip->trans = dmnsn_translation_matrix(dmnsn_new_vector(5.0, -2.0, -4.0));
   dmnsn_array_push(scene->objects, &strip);
+}
 
+static void
+dmnsn_test_scene_add_ground(dmnsn_scene *scene)
+{
   dmnsn_object *plane = dmnsn_new_plane(dmnsn_new_vector(0.0, 1.0, 0.0));
   plane->trans = dmnsn_translation_matrix(dmnsn_new_vector(0.0, -2.0, 0.0));
   dmnsn_pattern *checker1 = dmnsn_new_checker_pattern();
   dmnsn_pattern *checker2 = dmnsn_new_checker_pattern();
-  dmnsn_map *checker_color_map = dmnsn_new_color_map();
-  dmnsn_add_map_entry(checker_color_map, 0.0, &dmnsn_black);
-  dmnsn_add_map_entry(checker_color_map, 1.0, &dmnsn_white);
-  dmnsn_pigment *pigment1 = dmnsn_new_solid_pigment(dmnsn_white);
-  dmnsn_pigment *pigment2
-    = dmnsn_new_color_map_pigment(checker1, checker_color_map,
+  dmnsn_map *small_map = dmnsn_new_pigment_map();
+  dmnsn_pigment_map_add_color(small_map, 0.0, dmnsn_black);
+  dmnsn_pigment_map_add_color(small_map, 1.0, dmnsn_white);
+  dmnsn_pigment *small_pigment =
+    dmnsn_new_pigment_map_pigment(checker1, small_map,
                                   DMNSN_PIGMENT_MAP_REGULAR);
-  pigment2->trans
-    = dmnsn_scale_matrix(dmnsn_new_vector(1.0/3.0, 1.0/3.0, 1.0/3.0));
-  dmnsn_map *checker_pigment_map = dmnsn_new_pigment_map();
-  dmnsn_add_map_entry(checker_pigment_map, 0.0, &pigment1);
-  dmnsn_add_map_entry(checker_pigment_map, 1.0, &pigment2);
+  small_pigment->trans =
+    dmnsn_scale_matrix(dmnsn_new_vector(1.0/3.0, 1.0/3.0, 1.0/3.0));
+  dmnsn_map *big_map = dmnsn_new_pigment_map();
+  dmnsn_pigment_map_add_color(big_map, 0.0, dmnsn_white);
+  dmnsn_add_map_entry(big_map, 1.0, &small_pigment);
   plane->texture = dmnsn_new_texture();
-  plane->texture->pigment
-    = dmnsn_new_pigment_map_pigment(checker2, checker_pigment_map,
-                                    DMNSN_PIGMENT_MAP_REGULAR);
+  plane->texture->pigment =
+    dmnsn_new_pigment_map_pigment(checker2, big_map, DMNSN_PIGMENT_MAP_REGULAR);
   plane->texture->pigment->quick_color = dmnsn_color_from_sRGB(
     dmnsn_new_color(1.0, 0.5, 0.75)
   );
   dmnsn_array_push(scene->objects, &plane);
+}
 
+static void
+dmnsn_test_scene_add_objects(dmnsn_scene *scene)
+{
+  dmnsn_test_scene_add_hollow_cube(scene);
+  dmnsn_test_scene_add_spike(scene);
+  dmnsn_test_scene_add_triangle_strip(scene);
+  dmnsn_test_scene_add_ground(scene);
+}
+
+/*
+ * Test scene
+ */
+static dmnsn_scene *
+dmnsn_new_test_scene(void)
+{
+  dmnsn_scene *scene = dmnsn_new_scene();
+  dmnsn_test_scene_set_defaults(scene);
+  dmnsn_test_scene_add_canvas(scene);
+  dmnsn_test_scene_add_camera(scene);
+  dmnsn_test_scene_add_sky_sphere(scene);
+  dmnsn_test_scene_add_lights(scene);
+  dmnsn_test_scene_add_objects(scene);
   return scene;
 }