PDFLIB_API void PDFLIB_CALL
PDF_skew(PDF *p, float alpha, float beta)
{
static const char fn[] = "PDF_skew";
pdc_matrix m;
if (!pdf_enter_api(p, fn, pdf_state_content, "(p[%p], %g, %g)\n",
(void *) p, alpha, beta))
return;
if (alpha == (float) 0 && beta == (float) 0)
return;
if (alpha > (float) 360 || alpha < (float) -360 ||
alpha == (float) -90 || alpha == (float) -270 ||
alpha == (float) 90 || alpha == (float) 270) {
pdc_error(p->pdc, PDC_E_ILLARG_FLOAT,
"alpha", pdc_errprintf(p->pdc, "%f", alpha), 0, 0);
}
if (beta > (float) 360 || beta < (float) -360 ||
beta == (float) -90 || beta == (float) -270 ||
beta == (float) 90 || beta == (float) 270) {
pdc_error(p->pdc, PDC_E_ILLARG_FLOAT,
"beta", pdc_errprintf(p->pdc, "%f", beta), 0, 0);
}
pdc_skew_matrix(p->ydirection * alpha, p->ydirection * beta, &m);
pdf_concat_raw(p, &m);
}
void
pdf__skew(PDF *p, pdc_scalar alpha, pdc_scalar beta)
{
pdc_matrix m;
pdc_check_number(p->pdc, "alpha", alpha);
pdc_check_number(p->pdc, "beta", beta);
if (alpha == 0 && beta == 0)
return;
if (alpha > 360 || alpha < -360 ||
alpha == -90 || alpha == -270 ||
alpha == 90 || alpha == 270)
{
pdc_error(p->pdc, PDC_E_ILLARG_FLOAT,
"alpha", pdc_errprintf(p->pdc, "%f", alpha), 0, 0);
}
if (beta > 360 || beta < -360 ||
beta == -90 || beta == -270 ||
beta == 90 || beta == 270)
{
pdc_error(p->pdc, PDC_E_ILLARG_FLOAT,
"beta", pdc_errprintf(p->pdc, "%f", beta), 0, 0);
}
pdc_skew_matrix(p->ydirection * alpha, p->ydirection * beta, &m);
pdf_concat_raw(p, &m);
}