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// 6 september 2015
#include "uipriv_unix.h"
#include "draw.h"
void m2c(uiDrawMatrix *m, cairo_matrix_t *c)
{
c->xx = m->M11;
c->yx = m->M12;
c->xy = m->M21;
c->yy = m->M22;
c->x0 = m->M31;
c->y0 = m->M32;
}
static void c2m(cairo_matrix_t *c, uiDrawMatrix *m)
{
m->M11 = c->xx;
m->M12 = c->yx;
m->M21 = c->xy;
m->M22 = c->yy;
m->M31 = c->x0;
m->M32 = c->y0;
}
void uiDrawMatrixTranslate(uiDrawMatrix *m, double x, double y)
{
cairo_matrix_t c;
cairo_matrix_t tmp;
m2c(m, &c);
cairo_matrix_init_translate(&tmp, x, y);
cairo_matrix_multiply(&c, &c, &tmp);
c2m(&c, m);
}
void uiDrawMatrixScale(uiDrawMatrix *m, double xCenter, double yCenter, double x, double y)
{
cairo_matrix_t c;
cairo_matrix_t tmp;
double xt, yt;
m2c(m, &c);
xt = x;
yt = y;
scaleCenter(xCenter, yCenter, &xt, &yt);
cairo_matrix_init_translate(&tmp, xt, yt);
cairo_matrix_scale(&tmp, x, y);
cairo_matrix_translate(&tmp, -xt, -yt);
cairo_matrix_multiply(&c, &c, &tmp);
c2m(&c, m);
}
void uiDrawMatrixRotate(uiDrawMatrix *m, double x, double y, double amount)
{
cairo_matrix_t c;
cairo_matrix_t tmp;
m2c(m, &c);
cairo_matrix_init_translate(&tmp, x, y);
cairo_matrix_rotate(&tmp, amount);
cairo_matrix_translate(&tmp, -x, -y);
cairo_matrix_multiply(&c, &c, &tmp);
c2m(&c, m);
}
void uiDrawMatrixSkew(uiDrawMatrix *m, double x, double y, double xamount, double yamount)
{
fallbackSkew(m, x, y, xamount, yamount);
}
void uiDrawMatrixMultiply(uiDrawMatrix *dest, uiDrawMatrix *src)
{
cairo_matrix_t c;
cairo_matrix_t d;
m2c(dest, &c);
m2c(src, &d);
cairo_matrix_multiply(&c, &c, &d);
c2m(&c, dest);
}
int uiDrawMatrixInvertible(uiDrawMatrix *m)
{
cairo_matrix_t c;
m2c(m, &c);
return cairo_matrix_invert(&c) == CAIRO_STATUS_SUCCESS;
}
int uiDrawMatrixInvert(uiDrawMatrix *m)
{
cairo_matrix_t c;
m2c(m, &c);
if (cairo_matrix_invert(&c) != CAIRO_STATUS_SUCCESS)
return 0;
c2m(&c, m);
return 1;
}
void uiDrawMatrixTransformPoint(uiDrawMatrix *m, double *x, double *y)
{
cairo_matrix_t c;
m2c(m, &c);
cairo_matrix_transform_point(&c, x, y);
}
void uiDrawMatrixTransformSize(uiDrawMatrix *m, double *x, double *y)
{
cairo_matrix_t c;
m2c(m, &c);
cairo_matrix_transform_distance(&c, x, y);
}
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