X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;ds=sidebyside;f=image.hpp;h=5a9704eb821b9fba736e9c00233b1b0996df2aea;hb=b3733a82424232f601867ee20311d7d4242ef1a9;hp=190b093adc1ea9e9ab136ccc29040545a2e53de7;hpb=0a91a3e83760539edc00b80cfb4338c95dfdedf2;p=apitrace

diff --git a/image.hpp b/image.hpp
index 190b093..5a9704e 100644
--- a/image.hpp
+++ b/image.hpp
@@ -59,11 +59,29 @@ public:
         delete [] pixels;
     }
 
+    inline unsigned char *start(void) {
+        return flipped ? pixels + (height - 1)*width*4 : pixels;
+    }
+
+    inline unsigned char *end(void) {
+        return flipped ? pixels - width*4 : pixels + height*width*4;
+    }
+
+    inline signed stride(void) const {
+        return flipped ? -width*4 : width*4;
+    }
+
     bool writeBMP(const char *filename) const;
     bool writePNG(const char *filename) const;
+
+    double compare(Image &ref);
 };
 
 
+Image *
+readPNG(const char *filename);
+
+
 } /* namespace Image */