static gint
gnome_print_fax_construct (GnomePrintContext *ctx)
{
GnomePrintFAX *fax;
ArtDRect rect;
gdouble dpix, dpiy;
gboolean result;
const GnomePrintUnit *unit;
fax = GNOME_PRINT_FAX (ctx);
fax->priv = g_new (GnomePrintFAXPrivate, 1);
fax->priv->fax_encode_buffer_pivot = 7;
fax->priv->first_code_of_doc = TRUE ;
rect.x0 = 0.0;
rect.y0 = 0.0;
rect.x1 = 21.0 * 72.0 / 2.54;
rect.y1 = 29.7 * 72.0 / 2.54;
dpix = 198.0;
dpiy = 198.0;
if (gnome_print_config_get_length (ctx->config, GNOME_PRINT_KEY_PAPER_WIDTH, &rect.x1, &unit)) {
gnome_print_convert_distance (&rect.x1, unit, GNOME_PRINT_PS_UNIT);
}
if (gnome_print_config_get_length (ctx->config, GNOME_PRINT_KEY_PAPER_HEIGHT, &rect.y1, &unit)) {
gnome_print_convert_distance (&rect.x1, unit, GNOME_PRINT_PS_UNIT);
}
gnome_print_config_get_double (ctx->config, GNOME_PRINT_KEY_RESOLUTION_DPI_X, &dpix);
gnome_print_config_get_double (ctx->config, GNOME_PRINT_KEY_RESOLUTION_DPI_Y, &dpiy);
/* fixme: should rgbp_construct take settings as argument? */
/* telemaco : the fax driver need width=1728 pixels , the heigth is arbitrary ..
usually heigth=2100 pixels . And the resolution we take it from gpa . */
if (!gnome_print_rgbp_construct (GNOME_PRINT_RGBP (fax), &rect, dpix, dpiy, 256)) return GNOME_PRINT_ERROR_UNKNOWN;
result = gnome_print_context_create_transport (ctx);
g_return_val_if_fail (result == GNOME_PRINT_OK, GNOME_PRINT_ERROR_UNKNOWN);
result = gnome_print_transport_open (ctx->transport);
g_return_val_if_fail (result == GNOME_PRINT_OK, GNOME_PRINT_ERROR_UNKNOWN);
return GNOME_PRINT_OK;
}
static VALUE
gp_convert_distance(VALUE self, VALUE distance, VALUE to)
{
gboolean ret;
gdouble dist = NUM2DBL(distance);
VALUE result;
ret = gnome_print_convert_distance(&dist,
RVAL2GPU(self),
RVAL2GPU(to));
if (ret) {
result = rb_float_new(dist);
} else {
result = Qnil;
}
return result;
}
/**
* gnome_print_convert_distance_full:
* @distance: The distance to convert, and the result on success
* @from: Units to convert from
* @to: Units to convert to
* @ctmscale: The userspace scale to use
* @devicescale: The device scale to use
*
* Convert a distance from one unit to another. You should supply a scale
* as necessary.
*
* ctmscale is userspace->absolute, devicescale is device->absolute
*
* Returns: %TRUE if the conversion is possible, %FALSE if
* it is not or on error
**/
gboolean
gnome_print_convert_distance_full (gdouble *distance, const GnomePrintUnit *from, const GnomePrintUnit *to,
gdouble ctmscale, gdouble devicescale)
{
gdouble absolute;
g_return_val_if_fail (distance != NULL, FALSE);
g_return_val_if_fail (from != NULL, FALSE);
g_return_val_if_fail (to != NULL, FALSE);
if (from->base == to->base)
return gnome_print_convert_distance (distance, from, to);
if ((from->base == GNOME_PRINT_UNIT_DIMENSIONLESS) || (to->base == GNOME_PRINT_UNIT_DIMENSIONLESS)) {
*distance = *distance * from->unittobase / to->unittobase;
}
switch (from->base) {
case GNOME_PRINT_UNIT_ABSOLUTE:
absolute = *distance * from->unittobase;
break;
case GNOME_PRINT_UNIT_DEVICE:
if (devicescale) {
absolute = *distance * from->unittobase * devicescale;
} else {
return FALSE;
}
break;
case GNOME_PRINT_UNIT_USERSPACE:
if (ctmscale) {
absolute = *distance * from->unittobase * ctmscale;
} else {
return FALSE;
}
break;
default:
g_warning ("file %s: line %d: Illegal unit (base %d)", __FILE__, __LINE__, from->base);
return FALSE;
break;
}
switch (to->base) {
case GNOME_PRINT_UNIT_DIMENSIONLESS:
case GNOME_PRINT_UNIT_ABSOLUTE:
*distance = absolute / to->unittobase;
break;
case GNOME_PRINT_UNIT_DEVICE:
if (devicescale) {
*distance = absolute / (to->unittobase * devicescale);
} else {
return FALSE;
}
break;
case GNOME_PRINT_UNIT_USERSPACE:
if (ctmscale) {
*distance = absolute / (to->unittobase * ctmscale);
} else {
return FALSE;
}
break;
default:
g_warning ("file %s: line %d: Illegal unit (base %d)", __FILE__, __LINE__, to->base);
return FALSE;
break;
}
return TRUE;
}
