116 lines
2.1 KiB
C
116 lines
2.1 KiB
C
// 6 september 2015
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#include "uipriv_unix.h"
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#include "draw.h"
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static void m2c(uiDrawMatrix *m, cairo_matrix_t *c)
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{
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c->xx = m->M11;
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c->yx = m->M12;
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c->xy = m->M21;
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c->yy = m->M22;
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c->x0 = m->M31;
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c->y0 = m->M32;
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}
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// needed by uiDrawTransform()
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void uiprivM2C(uiDrawMatrix *m, cairo_matrix_t *c)
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{
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m2c(m, c);
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}
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static void c2m(cairo_matrix_t *c, uiDrawMatrix *m)
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{
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m->M11 = c->xx;
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m->M12 = c->yx;
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m->M21 = c->xy;
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m->M22 = c->yy;
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m->M31 = c->x0;
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m->M32 = c->y0;
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}
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void uiDrawMatrixTranslate(uiDrawMatrix *m, double x, double y)
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{
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cairo_matrix_t c;
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m2c(m, &c);
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cairo_matrix_translate(&c, x, y);
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c2m(&c, m);
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}
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void uiDrawMatrixScale(uiDrawMatrix *m, double xCenter, double yCenter, double x, double y)
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{
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cairo_matrix_t c;
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double xt, yt;
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m2c(m, &c);
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xt = x;
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yt = y;
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uiprivScaleCenter(xCenter, yCenter, &xt, &yt);
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cairo_matrix_translate(&c, xt, yt);
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cairo_matrix_scale(&c, x, y);
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cairo_matrix_translate(&c, -xt, -yt);
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c2m(&c, m);
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}
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void uiDrawMatrixRotate(uiDrawMatrix *m, double x, double y, double amount)
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{
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cairo_matrix_t c;
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m2c(m, &c);
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cairo_matrix_translate(&c, x, y);
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cairo_matrix_rotate(&c, amount);
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cairo_matrix_translate(&c, -x, -y);
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c2m(&c, m);
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}
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void uiDrawMatrixSkew(uiDrawMatrix *m, double x, double y, double xamount, double yamount)
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{
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uiprivFallbackSkew(m, x, y, xamount, yamount);
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}
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void uiDrawMatrixMultiply(uiDrawMatrix *dest, uiDrawMatrix *src)
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{
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cairo_matrix_t c;
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cairo_matrix_t d;
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m2c(dest, &c);
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m2c(src, &d);
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cairo_matrix_multiply(&c, &c, &d);
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c2m(&c, dest);
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}
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int uiDrawMatrixInvertible(uiDrawMatrix *m)
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{
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cairo_matrix_t c;
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m2c(m, &c);
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return cairo_matrix_invert(&c) == CAIRO_STATUS_SUCCESS;
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}
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int uiDrawMatrixInvert(uiDrawMatrix *m)
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{
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cairo_matrix_t c;
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m2c(m, &c);
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if (cairo_matrix_invert(&c) != CAIRO_STATUS_SUCCESS)
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return 0;
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c2m(&c, m);
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return 1;
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}
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void uiDrawMatrixTransformPoint(uiDrawMatrix *m, double *x, double *y)
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{
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cairo_matrix_t c;
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m2c(m, &c);
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cairo_matrix_transform_point(&c, x, y);
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}
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void uiDrawMatrixTransformSize(uiDrawMatrix *m, double *x, double *y)
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{
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cairo_matrix_t c;
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m2c(m, &c);
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cairo_matrix_transform_distance(&c, x, y);
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}
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