From cca66b9ec4e494c1d919bff0f71a820d8afab1fa Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:24:48 +0200 Subject: Adding upstream version 1.2.2. Signed-off-by: Daniel Baumann --- src/3rdparty/autotrace/spline.h | 88 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 src/3rdparty/autotrace/spline.h (limited to 'src/3rdparty/autotrace/spline.h') 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 +#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 */ -- cgit v1.2.3