Merge remote-tracking branch 'origin/master' into 2.0

[dcpomatic.git] / src / lib / image.cc

diff --git a/src/lib/image.cc b/src/lib/image.cc
index 680c063f1a4d30ca9e364bbdbed615e7fafc9376..0b06d39b1f3f215698d850452cf2f951371bab48 100644 (file)
--- a/src/lib/image.cc
+++ b/src/lib/image.cc
@@ -41,7 +41,6 @@ using std::min;
 using std::cout;
 using std::cerr;
 using std::list;
-using std::stringstream;
 using boost::shared_ptr;
 using dcp::Size;
 
@@ -691,3 +690,30 @@ Image::digest () const
 
        return digester.get ();
 }
+
+bool
+operator== (Image const & a, Image const & b)
+{
+       if (a.components() != b.components() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
+               return false;
+       }
+
+       for (int c = 0; c < a.components(); ++c) {
+               if (a.lines(c) != b.lines(c) || a.line_size()[c] != b.line_size()[c] || a.stride()[c] != b.stride()[c]) {
+                       return false;
+               }
+
+               uint8_t* p = a.data()[c];
+               uint8_t* q = b.data()[c];
+               for (int y = 0; y < a.lines(c); ++y) {
+                       if (memcmp (p, q, a.line_size()[c]) != 0) {
+                               return false;
+                       }
+
+                       p += a.stride()[c];
+                       q += b.stride()[c];
+               }
+       }
+
+       return true;
+}