pdf: add support for object streams for PDF >= 1.5

This allows all objects that were previously emitted uncompressed to
be compressed into a an object stream.

Currently only /Page, /Pages, and /Catalog have been converted to use
object streams.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/cairo-pdf-surface-private.h b/src/cairo-pdf-surface-private.h
index 65fd8c741..673e20a6d 100644
--- a/src/cairo-pdf-surface-private.h
+++ b/src/cairo-pdf-surface-private.h
@@ -55,6 +55,7 @@ typedef struct _cairo_pdf_resource {
     unsigned int id;
 } cairo_pdf_resource_t;
 
+
 #define CAIRO_NUM_OPERATORS (CAIRO_OPERATOR_HSL_LUMINOSITY + 1)
 
 typedef struct _cairo_pdf_group_resources {
@@ -315,6 +316,13 @@ struct _cairo_pdf_surface {
 	cairo_bool_t is_knockout;
     } group_stream;
 
+    struct {
+	cairo_bool_t active;
+	cairo_output_stream_t *stream;
+	cairo_pdf_resource_t resource;
+	cairo_array_t objects;
+    } object_stream;
+
     cairo_surface_clipper_t clipper;
 
     cairo_pdf_operators_t pdf_operators;
@@ -378,6 +386,13 @@ _cairo_pdf_interchange_tag_begin (cairo_pdf_surface_t    *surface,
 				  const char             *attributes);
 
 cairo_private cairo_int_status_t
+_cairo_pdf_surface_object_begin (cairo_pdf_surface_t *surface,
+				 cairo_pdf_resource_t resource);
+
+cairo_private void
+_cairo_pdf_surface_object_end (cairo_pdf_surface_t *surface);
+
+cairo_private cairo_int_status_t
 _cairo_pdf_interchange_tag_end (cairo_pdf_surface_t *surface,
 				const char          *name);