pdf_filter_gs_CA(fz_context *ctx, pdf_processor *proc, float alpha)
{
	pdf_filter_processor *p = (pdf_filter_processor*)proc;
	if (p->chain->op_gs_CA)
		p->chain->op_gs_CA(ctx, p->chain, alpha);
}
pdf_filter_gs_CA(fz_context *ctx, pdf_processor *proc, float alpha)
{
	pdf_filter_processor *p = (pdf_filter_processor*)proc;
	if (p->chain->op_gs_CA)
		p->chain->op_gs_CA(ctx, p->chain, alpha);
}