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/* See LICENSE file for copyright and license details. */
#include "libfonts.h"
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#define DOUBLE_TOLERANCE 0.000001
static inline void
transform(double *x_out, double *y_out, double x, double y, const struct libfonts_transformation *transformation)
{
double a = transformation->m[0][0], b = transformation->m[0][1], c = transformation->m[0][2];
double d = transformation->m[1][0], e = transformation->m[1][1], f = transformation->m[1][2];
double g = transformation->m[2][0], h = transformation->m[2][1], i = transformation->m[2][2];
double w = g*x + h*y + i;
*x_out = (a*x + b*y + c) / w;
*y_out = (d*x + e*y + f) / w;
}
static inline int
eq(double a, double b)
{
return b - DOUBLE_TOLERANCE <= a && a <= b + DOUBLE_TOLERANCE;
}
#ifdef TEST
# define ASSERT(ASSERTION)\
do {\
if (!(ASSERTION)) {\
fprintf(stderr, "Failed assertion at line %u: %s\n", __LINE__, #ASSERTION);\
exit(1);\
}\
} while (0)
#endif
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