pdf: avoid making groups a transparency group if not required

If the group contains only a combination of clear and opaque alpha and
only OPERATOR_OVER is used in the group and to paint the group, a
transparency group is not required. This allows the pdf viewer to
replay the group in place.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/cairo-pdf-surface-private.h b/src/cairo-pdf-surface-private.h
index d9f65d800..dfeb1aacb 100644
--- a/src/cairo-pdf-surface-private.h
+++ b/src/cairo-pdf-surface-private.h
@@ -70,6 +70,7 @@ typedef struct _cairo_pdf_source_surface_entry {
     unsigned int id;
     unsigned char *unique_id;
     unsigned long unique_id_length;
+    cairo_operator_t operator;
     cairo_bool_t interpolate;
     cairo_bool_t stencil_mask;
     cairo_pdf_resource_t surface_res;
@@ -92,6 +93,7 @@ typedef struct _cairo_pdf_pattern {
     cairo_pattern_t *pattern;
     cairo_pdf_resource_t pattern_res;
     cairo_pdf_resource_t gstate_res;
+    cairo_operator_t operator;
     cairo_bool_t is_shading;
 } cairo_pdf_pattern_t;