static void
pdf_dev_alpha(fz_context *ctx, pdf_device *pdev, float alpha, int stroke)
{
int i;
pdf_document *doc = pdev->doc;
gstate *gs = CURRENT_GSTATE(pdev);
/* If the alpha is unchanged, nothing to do */
if (gs->alpha[stroke] == alpha)
return;
/* Have we sent such an alpha before? */
for (i = 0; i < pdev->num_alphas; i++)
if (pdev->alphas[i].alpha == alpha && pdev->alphas[i].stroke == stroke)
break;
if (i == pdev->num_alphas)
{
pdf_obj *o;
pdf_obj *ref = NULL;
fz_var(ref);
/* No. Need to make a new one */
if (pdev->num_alphas == pdev->max_alphas)
{
int newmax = pdev->max_alphas * 2;
if (newmax == 0)
newmax = 4;
pdev->alphas = fz_resize_array(ctx, pdev->alphas, newmax, sizeof(*pdev->alphas));
pdev->max_alphas = newmax;
}
pdev->alphas[i].alpha = alpha;
pdev->alphas[i].stroke = stroke;
o = pdf_new_dict(ctx, doc, 1);
fz_try(ctx)
{
char text[32];
pdf_dict_put_drop(ctx, o, (stroke ? PDF_NAME_CA : PDF_NAME_ca), pdf_new_real(ctx, doc, alpha));
ref = pdf_add_object(ctx, doc, o);
fz_snprintf(text, sizeof(text), "ExtGState/Alp%d", i);
pdf_dict_putp(ctx, pdev->resources, text, ref);
}
fz_always(ctx)
{
pdf_drop_obj(ctx, o);
pdf_drop_obj(ctx, ref);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
pdev->num_alphas++;
}
static void insert_resource_name(pdf_csi *csi, pdf_filter_state *state, const char *key, const char *name)
{
pdf_obj *xobj;
pdf_obj *obj;
if (!state->resources || !name || name[0] == 0)
return;
xobj = pdf_dict_gets(csi->rdb, key);
obj = pdf_dict_gets(xobj, name);
xobj = pdf_dict_gets(state->resources, key);
if (xobj == NULL) {
xobj = pdf_new_dict(csi->doc, 1);
pdf_dict_puts_drop(state->resources, key, xobj);
}
pdf_dict_putp(xobj, name, obj);
}
static void
copy_resource(fz_context *ctx, pdf_filter_processor *p, pdf_obj *key, const char *name)
{
pdf_obj *res, *obj;
if (!name || name[0] == 0)
return;
res = pdf_dict_get(ctx, p->old_rdb, key);
obj = pdf_dict_gets(ctx, res, name);
if (obj)
{
res = pdf_dict_get(ctx, p->new_rdb, key);
if (!res)
{
res = pdf_new_dict(ctx, p->doc, 1);
pdf_dict_put_drop(ctx, p->new_rdb, key, res);
}
pdf_dict_putp(ctx, res, name, obj);
}
}