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-rw-r--r--src/3rdparty/autotrace/spline.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/src/3rdparty/autotrace/spline.h b/src/3rdparty/autotrace/spline.h
new file mode 100644
index 0000000..6cbd143
--- /dev/null
+++ b/src/3rdparty/autotrace/spline.h
@@ -0,0 +1,88 @@
+/* spline.h: manipulate the spline representation.
+ Some of macrs are only renamed macros in output.h. */
+
+#ifndef SPLINE_H
+#define SPLINE_H
+
+#include <stdio.h>
+#include "autotrace.h"
+#include "output.h"
+
+typedef at_polynomial_degree polynomial_degree;
+typedef at_spline_type spline_type;
+
+#define LINEARTYPE AT_LINEARTYPE
+#define QUADRATICTYPE AT_QUADRATICTYPE
+#define CUBICTYPE AT_CUBICTYPE
+#define PARALLELELLIPSETYPE AT_PARALLELELLIPSETYPE
+#define ELLIPSETYPE AT_ELLIPSETYPE
+#define CIRCLETYPE AT_CIRCLETYPE
+
+#define START_POINT AT_SPLINE_START_POINT_VALUE
+#define CONTROL1 AT_SPLINE_CONTROL1_VALUE
+#define CONTROL2 AT_SPLINE_CONTROL2_VALUE
+#define END_POINT AT_SPLINE_END_POINT_VALUE
+#define SPLINE_DEGREE AT_SPLINE_DEGREE_VALUE
+#define SPLINE_LINEARITY(spl) ((spl).linearity)
+
+#ifndef _IMPORTING
+/* Print a spline on the given file. */
+extern void print_spline(spline_type);
+
+/* Evaluate SPLINE at the given T value. */
+extern at_real_coord evaluate_spline(spline_type spline, gfloat t);
+#endif
+
+/* Each outline in a character is typically represented by many
+ splines. So, here is a list structure for that: */
+typedef at_spline_list_type spline_list_type;
+
+/* An empty list will have length zero (and null data). */
+#define SPLINE_LIST_LENGTH AT_SPLINE_LIST_LENGTH_VALUE
+
+/* The address of the beginning of the array of data. */
+#define SPLINE_LIST_DATA AT_SPLINE_LIST_DATA_VALUE
+
+/* The element INDEX in S_L. */
+#define SPLINE_LIST_ELT AT_SPLINE_LIST_ELT_VALUE
+
+/* The last element in S_L. */
+#define LAST_SPLINE_LIST_ELT(s_l) \
+ (SPLINE_LIST_DATA (s_l)[SPLINE_LIST_LENGTH (s_l) - 1])
+
+/* The previous and next elements to INDEX in S_L. */
+#define NEXT_SPLINE_LIST_ELT(s_l, index) \
+ SPLINE_LIST_ELT (s_l, ((index) + 1) % SPLINE_LIST_LENGTH (s_l))
+#define PREV_SPLINE_LIST_ELT(s_l, index) \
+ SPLINE_LIST_ELT (s_l, index == 0 \
+ ? SPLINE_LIST_LENGTH (s_l) - 1 \
+ : index - 1)
+
+#ifndef _IMPORTING
+/* Construct and destroy new `spline_list_type' objects. */
+extern spline_list_type *new_spline_list(void); /* Allocate new memory */
+extern spline_list_type empty_spline_list(void); /* No allocation */
+extern spline_list_type *new_spline_list_with_spline(spline_type);
+extern void free_spline_list(spline_list_type);
+
+/* Append the spline S to the list S_LIST. */
+extern void append_spline(spline_list_type * s_list, spline_type s);
+
+/* Append the elements in list S2 to S1, changing S1. */
+extern void concat_spline_lists(spline_list_type * s1, spline_list_type s2);
+#endif
+
+typedef at_spline_list_array_type spline_list_array_type;
+
+/* Turns out we can use the same definitions for lists of lists as for
+ just lists. But we define the usual names, just in case. */
+#define SPLINE_LIST_ARRAY_LENGTH AT_SPLINE_LIST_ARRAY_LENGTH_VALUE
+#define SPLINE_LIST_ARRAY_DATA SPLINE_LIST_DATA
+#define SPLINE_LIST_ARRAY_ELT AT_SPLINE_LIST_ARRAY_ELT_VALUE
+#define LAST_SPLINE_LIST_ARRAY_ELT LAST_SPLINE_LIST_ELT
+
+extern spline_list_array_type new_spline_list_array(void);
+extern void append_spline_list(spline_list_array_type *, spline_list_type);
+extern void free_spline_list_array(spline_list_array_type *);
+
+#endif /* not SPLINE_H */