static DiaPattern *
_create_preset_pattern (guint n)
{
DiaPattern *pat;
Color color;
g_return_val_if_fail (n < G_N_ELEMENTS (_pattern_presets), NULL);
switch (_pattern_presets[n].type) {
case DIA_LINEAR_GRADIENT:
pat = dia_pattern_new (_pattern_presets[n].type, 0, 0.0, 0.0);
if (_pattern_presets[n].flags != 0)
dia_pattern_set_point (pat,
_pattern_presets[n].flags & LEFT ? 1.0 : 0.0,
_pattern_presets[n].flags & DOWN ? 1.0 : 0.0);
break;
case DIA_RADIAL_GRADIENT:
pat = dia_pattern_new (_pattern_presets[n].type, 0, 0.5, 0.5);
dia_pattern_set_radius (pat, 0.5);
/* set the focal point to the center */
dia_pattern_set_point (pat, 0.5, 0.5);
break;
default :
g_assert_not_reached ();
}
color = attributes_get_background ();
dia_pattern_add_color (pat, 0.0, &color);
color = attributes_get_foreground ();
dia_pattern_add_color (pat, 1.0, &color);
return pat;
}
GBool radialShadedFill(GfxState *state, GfxRadialShading *shading, double sMin, double sMax)
{
double x0, y0, r0, x1, y1, r1;
double dx, dy, dr;
shading->getCoords(&x0, &y0, &r0, &x1, &y1, &r1);
x0 *= scale;
y0 *= scale;
x1 *= scale;
y1 *= scale;
r0 *= scale;
r1 *= scale;
dx = x1 - x0;
dy = y1 - y0;
dr = r1 - r0;
if (this->pattern)
g_object_unref (this->pattern);
this->pattern = dia_pattern_new (DIA_RADIAL_GRADIENT, DIA_PATTERN_USER_SPACE,
x0 + sMax * dx, y0 + sMax * dy);
dia_pattern_set_radius (this->pattern, r0 + sMax * dr);
dia_pattern_set_point (this->pattern, x0 + sMin * dx, y0 + sMin * dy);
// continue with updateFillColorStop calls
// although wasteful, because Poppler samples these to 256 entries
return gFalse;
}