Merge to XFA: Separate agg-authored code from fx-authored code.

Original Review URL: https://codereview.chromium.org/1152743007.
BUG=pdfium:166
R=brucedawson@chromium.org, thestig@chromium.org
TBR=brucedawson@chromium.org, thestig@chromium.org

Review URL: https://codereview.chromium.org/1186423003.

1 files changed, 50 insertions, 0 deletions

diff --git a/third_party/agg23/agg_render_scanlines.h b/third_party/agg23/agg_render_scanlines.h
new file mode 100644
index 0000000000..0dfd6d259f
--- /dev/null
+++ b/third_party/agg23/agg_render_scanlines.h
@@ -0,0 +1,50 @@
+
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.3
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+#ifndef AGG_RENDER_SCANLINES_INCLUDED
+#define AGG_RENDER_SCANLINES_INCLUDED
+#include "agg_basics.h"
+namespace agg
+{
+template<class Rasterizer, class Scanline, class Renderer>
+void render_scanlines(Rasterizer& ras, Scanline& sl, Renderer& ren, bool no_smooth)
+{
+    if(ras.rewind_scanlines()) {
+        sl.reset(ras.min_x(), ras.max_x());
+        ren.prepare(unsigned(ras.max_x() - ras.min_x() + 2));
+        while(ras.sweep_scanline(sl, no_smooth)) {
+            ren.render(sl);
+        }
+    }
+}
+template<class Rasterizer, class Scanline, class Renderer,
+         class VertexSource, class ColorStorage, class PathId>
+void render_all_paths(Rasterizer& ras,
+                      Scanline& sl,
+                      Renderer& r,
+                      VertexSource& vs,
+                      const ColorStorage& as,
+                      const PathId& path_id,
+                      unsigned num_paths)
+{
+    for(unsigned i = 0; i < num_paths; i++) {
+        ras.reset();
+        ras.add_path(vs, path_id[i]);
+        r.color(as[i]);
+        render_scanlines(ras, sl, r);
+    }
+}
+}
+#endif