[Libreoffice-commits] online.git: common/Png.hpp

[Tor Lillqvist]

 common/Png.hpp |    3 +++
 1 file changed, 3 insertions(+)

New commits:
commit c8d3f90e56459238648f8e7830ed05d9bdd28951
Author: Tor Lillqvist <tml at collabora.com>
Date:   Wed Jan 4 14:36:13 2017 +0200

    Add an assert to make sure assumptions I am about to make will hold
    
    Change-Id: Ifc1eeb61aa345cf177e3c5996ed7bc48f6aeb07c

diff --git a/common/Png.hpp b/common/Png.hpp
index b3c0863..ab6a795 100644
--- a/common/Png.hpp
+++ b/common/Png.hpp
@@ -127,6 +127,9 @@ bool encodeSubBufferToPNG(unsigned char* pixmap, size_t startX, size_t startY,
         return false;
     }
 
+    // This function seems to be always called with an empty _output_ vector. Make sure we can rely on that.
+    assert(output.size() == 0);
+
     png_set_IHDR(png_ptr, info_ptr, width, height, 8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
 
     png_set_write_fn(png_ptr, &output, user_write_fn, user_flush_fn);