Add cairo_output_stream.c

Add new errors, CAIRO_STATUS_WRITE_ERROR and CAIRO_STATUS_SURFACE_FINISHED, add cairo_surface_finish() prototype, add cairo_write_func_t.
Add strings for new errors, documentation fix.
Rename surface destroy functions to finish and change them to not free the surface.
Change PDF surface constructors to take a write function in the general case and add stdio convenience constructors. Change destroy function to finish for cairo_pdf_surface. Change implementation to use cairo_output_stream_t functions for output.
Use _cairo_surface_show_glyphs instead of calling function pointer directly.
Add prototypes for cairo output stream functions, rename destroy to finish in cairo_surface_backend_t and add finished flag to cairo_surface_t.
Add cairo_surface_finish() and call it from cairo_surface_destroy(). Check the finished flag in cairo_surface_t in functions that change the surface.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/cairo-ps-surface.c b/src/cairo-ps-surface.c
index 4a45fc679..a0a92dc21 100644
--- a/src/cairo-ps-surface.c
+++ b/src/cairo-ps-surface.c
@@ -170,8 +170,8 @@ _cairo_ps_surface_create_similar (void		*abstract_src,
     return NULL;
 }
 
-static void
-_cairo_ps_surface_destroy (void *abstract_surface)
+static cairo_status_t
+_cairo_ps_surface_finish (void *abstract_surface)
 {
     cairo_ps_surface_t *surface = abstract_surface;
 
@@ -180,7 +180,7 @@ _cairo_ps_surface_destroy (void *abstract_surface)
 
     cairo_surface_destroy (&surface->image->base);
 
-    free (surface);
+    return CAIRO_STATUS_SUCCESS;
 }
 
 static void
@@ -426,7 +426,7 @@ _cairo_ps_surface_set_clip_region (void *abstract_surface,
 
 static const cairo_surface_backend_t cairo_ps_surface_backend = {
     _cairo_ps_surface_create_similar,
-    _cairo_ps_surface_destroy,
+    _cairo_ps_surface_finish,
     _cairo_ps_surface_pixels_per_inch,
     _cairo_ps_surface_acquire_source_image,
     _cairo_ps_surface_release_source_image,