Updating Difference Metric score calculation

tests/make_png/Makefile

@@ -25,3 +25,4 @@ clean:
 
 
 
+

tests/make_png/bitmap.c

@@ -624,3 +624,19 @@ IMAGE* Append_Rows(IMAGE* small, IMAGE* big){
 
   return result; 
 }
+
+int Image_Diff( IMAGE* base, IMAGE* test){
+
+  int diff = 0;
+
+  int max_width = MAX(base->width, test->width);
+  int min_width = MIN(base->width, test->width);
+
+  int max_height = MAX(base->height, test->height);
+  int min_height = MIN(base->height, test->height);
+
+  diff = (max_width - min_width) * max_height;
+  diff += (max_height - min_height) * min_width;
+
+  return diff;
+}

tests/make_png/bitmap.h

@@ -21,6 +21,7 @@
 
 #define BITS_PER_PIXEL_RGBA 32
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
 
 typedef struct {                /* To store 32bit Hash */
   FT_UInt32 hash;
@@ -89,3 +90,5 @@ int First_Row(IMAGE* input);
 IMAGE* Append_Columns(IMAGE* small, IMAGE* big);
 /* Appening white columns with image alignment */
 IMAGE* Append_Rows(IMAGE* small, IMAGE* big);
+/* calculating the Pixel Differences */
+int Image_Diff( IMAGE* base, IMAGE* test);

tests/make_png/images/README

@@ -1 +1,2 @@
-This folder includes all the images generated
+This folder includes all the images generated
+

tests/make_png/make_sprite.c

@@ -448,6 +448,8 @@ int main(int argc, char const *argv[])
         test_png = Append_Columns(test_png, base_png);
       }
 
+      pixel_diff += Image_Diff( base_png, test_png);
+
       Add_effect( base_png, test_png, after_effect_1, 1);
       pixel_diff = Add_effect( base_png, test_png, after_effect_2,2);
 
@@ -505,4 +507,4 @@ int main(int argc, char const *argv[])
   dlclose(test_handle);
 
   return 0;
-}
+}

tests/make_png/murmur3.c

@@ -304,4 +304,3 @@ void MurmurHash3_x64_128 ( const void * key, const int len,
 }
 
 /*------------------------------------------------------------------*/
-

tests/make_png/script.js

@@ -19,4 +19,4 @@ function sort_t(tbody, col, asc){
         arr[i] = "<td>"+arr[i].join("</td><td>")+"</td>";
     }
     tbody.innerHTML = "<tr>"+arr.join("</tr><tr>")+"</tr>";
-}
+}

tests/make_png/style.css

@@ -35,3 +35,4 @@ th {
 #hash{
   font-size: 12px;
 }
+