Transparent background with pdfcairo

[Christoph B. <us...@be...>]

Hi,

is there a specific reason why the 'transparent' terminal option applies 
only to the pngcairo and not to the pdfcairo terminal?

I removed the two respective lines in term/cairo.trm and it worked well 
for me:

--- gnuplot-cvs/term/cairo.trm	2011-05-23 13:48:46.000000000 +0200
+++ gnuplot/term/cairo.trm	2011-05-23 14:00:16.000000000 +0200
@@ -299,13 +299,11 @@
  			break;
  		case CAIROTRM_TRANSPARENT:
  			c_token++;
-			if (!strcmp(term->name,"pngcairo"))
-			    cairo_params->transparent = TRUE;
+			cairo_params->transparent = TRUE;
  			break;
  		case CAIROTRM_NOTRANSPARENT:
  			c_token++;
-			if (!strcmp(term->name,"pngcairo"))
-			    cairo_params->transparent = FALSE;
+			cairo_params->transparent = FALSE;
  			break;
  		case CAIROTRM_CROP:
  			c_token++;


I only tested it with
set terminal pdfcairo transparent
set output 'test-transparency.pdf'
plot sin(x)

But because there is an explicit test for the pngcairo terminal, I 
suppose there was a good reason for this?

Christoph