diff --git a/.hgignore b/.hgignore
index fda43040..c7845b77 100644
--- a/.hgignore
+++ b/.hgignore
@@ -14,7 +14,6 @@ cocoa/*/dg_cocoa.plugin
 qt/base/*_rc.py
 qt/base/*_ui.py
 qt/*/*_ui.py
-qt/pe/modules/block/block.c
 help_se/dupeguru_help
 help_me/dupeguru_me_help
 help_pe/dupeguru_pe_help
\ No newline at end of file
diff --git a/qt/pe/modules/block/block.c b/qt/pe/modules/block/block.c
new file mode 100644
index 00000000..44cb97b1
--- /dev/null
+++ b/qt/pe/modules/block/block.c
@@ -0,0 +1,160 @@
+/* Created By: Virgil Dupras
+ * Created On: 2010-01-31
+ * Copyright 2010 Hardcoded Software (http://www.hardcoded.net)
+ *
+ * This software is licensed under the "HS" License as described in the "LICENSE" file, 
+ * which should be included with this package. The terms are also available at 
+ * http://www.hardcoded.net/licenses/hs_license
+ */
+
+#define PY_SSIZE_T_CLEAN
+#include "Python.h"
+
+static inline int
+max(int a, int b)
+{
+    return b > a ? b : a;
+}
+
+static inline int
+min(int a, int b)
+{
+    return b < a ? b : a;
+}
+
+static inline PyObject*
+getblock(PyObject *image)
+{
+    int width, height, pixel_count, red, green, blue, bytes_per_line;
+    PyObject *pi, *pred, *pgreen, *pblue;
+    PyObject *result;
+    
+    red = green = blue = 0;
+    pi = PyObject_CallMethod(image, "width", NULL);
+    width = PyInt_AsSsize_t(pi);
+    Py_DECREF(pi);
+    pi = PyObject_CallMethod(image, "height", NULL);
+    height = PyInt_AsSsize_t(pi);
+    Py_DECREF(pi);
+    pixel_count = width * height;
+    if (pixel_count) {
+        PyObject *sipptr;
+        char *s;
+        int i;
+        
+        pi = PyObject_CallMethod(image, "bytesPerLine", NULL);
+        bytes_per_line = PyInt_AsSsize_t(pi);
+        Py_DECREF(pi);
+        
+        sipptr = PyObject_CallMethod(image, "bits", NULL);
+        pi = PyObject_CallMethod(sipptr, "__int__", NULL);
+        Py_DECREF(sipptr);
+        s = (char *)PyInt_AsSsize_t(pi);
+        Py_DECREF(pi);
+        /* Qt aligns all its lines on 32bit, which means that if the number of bytes per
+         * line for image is not divisible by 4, there's going to be crap inserted in "s"
+         * We have to take this into account when calculating offsets
+        **/
+        for (i=0; i<height; i++) {
+            int j;
+            for (j=0; j<width; j++) {
+                int offset;
+                unsigned char r, g, b;
+                
+                offset = i * bytes_per_line + j * 3;
+                r = s[offset];
+                g = s[offset + 1];
+                b = s[offset + 2];
+                red += r;
+                green += g;
+                blue += b;
+            }
+        }
+        
+        red /= pixel_count;
+        green /= pixel_count;
+        blue /= pixel_count;
+    }
+    
+    pred = PyInt_FromSsize_t(red);
+    pgreen = PyInt_FromSsize_t(green);
+    pblue = PyInt_FromSsize_t(blue);
+    result = PyTuple_Pack(3, pred, pgreen, pblue);
+    Py_DECREF(pred);
+    Py_DECREF(pgreen);
+    Py_DECREF(pblue);
+    
+    return result;
+}
+
+static PyObject*
+block_getblocks(PyObject *self, PyObject *args)
+{
+    int block_count_per_side, width, height, block_width, block_height, ih;
+    PyObject *image;
+    PyObject *pi;
+    PyObject *result;
+    
+    if (!PyArg_ParseTuple(args, "Oi", &image, &block_count_per_side)) {
+        return NULL;
+    }
+    
+    pi = PyObject_CallMethod(image, "width", NULL);
+    width = PyInt_AsSsize_t(pi);
+    Py_DECREF(pi);
+    pi = PyObject_CallMethod(image, "height", NULL);
+    height = PyInt_AsSsize_t(pi);
+    Py_DECREF(pi);
+    
+    if (!(width && height)) {
+        return PyList_New(0);
+    }
+    
+    block_width = max(width / block_count_per_side, 1);
+    block_height = max(height / block_count_per_side, 1);
+    
+    result = PyList_New(block_count_per_side * block_count_per_side);
+    if (result == NULL) {
+        return NULL;
+    }
+    
+    for (ih=0; ih<block_count_per_side; ih++) {
+        int top, iw;
+        top = min(ih*block_height, height-block_height-1);
+        for (iw=0; iw<block_count_per_side; iw++) {
+            int left;
+            PyObject *pcrop;
+            PyObject *pblock;
+            
+            left = min(iw*block_width, width-block_width-1);
+            pcrop = PyObject_CallMethod(image, "copy", "iiii", left, top, block_width, block_height);
+            if (pcrop == NULL) {
+                Py_DECREF(result);
+                return NULL;
+            }
+            pblock = getblock(pcrop);
+            Py_DECREF(pcrop);
+            if (pblock == NULL) {
+                Py_DECREF(result);
+                return NULL;
+            }
+            PyList_SET_ITEM(result, ih*block_count_per_side+iw, pblock);
+        }
+    }
+    
+    return result;
+}
+
+static PyMethodDef BlockMethods[] = {
+    {"getblocks",  block_getblocks, METH_VARARGS, ""},
+    {NULL, NULL, 0, NULL} /* Sentinel */
+};
+
+PyMODINIT_FUNC
+init_block(void)
+{
+    PyObject *m = Py_InitModule("_block", BlockMethods);
+    if (m == NULL) {
+        return;
+    }
+}
\ No newline at end of file
diff --git a/qt/pe/modules/block/block.pyx b/qt/pe/modules/block/block.pyx
deleted file mode 100644
index 88ce4d33..00000000
--- a/qt/pe/modules/block/block.pyx
+++ /dev/null
@@ -1,50 +0,0 @@
-# Copyright 2010 Hardcoded Software (http://www.hardcoded.net)
-# 
-# This software is licensed under the "HS" License as described in the "LICENSE" file, 
-# which should be included with this package. The terms are also available at 
-# http://www.hardcoded.net/licenses/hs_license
-
-cdef object getblock(object image):
-    cdef int width, height, pixel_count, red, green, blue, i, offset, bytes_per_line
-    cdef char *s
-    cdef unsigned char r, g, b
-    width = image.width()
-    height = image.height()
-    if width:
-        pixel_count = width * height
-        red = green = blue = 0
-        bytes_per_line = image.bytesPerLine()
-        tmp = image.bits().asstring(image.numBytes())
-        s = tmp
-        # Qt aligns all its lines on 32bit, which means that if the number of bytes per
-        # line for image is not divisible by 4, there's going to be crap inserted in "s"
-        # We have to take this into account when calculating offsets
-        for i in range(height):
-            for j in range(width):
-                offset = i * bytes_per_line + j * 3
-                r = s[offset]
-                g = s[offset + 1]
-                b = s[offset + 2]
-                red += r
-                green += g
-                blue += b
-        return (red // pixel_count, green // pixel_count, blue // pixel_count)
-    else:
-        return (0, 0, 0)
-
-def getblocks(image, int block_count_per_side):
-    cdef int width, height, block_width, block_height, ih, iw, top, left
-    width = image.width()
-    height = image.height()
-    if not width:
-        return []
-    block_width = max(width // block_count_per_side, 1)
-    block_height = max(height // block_count_per_side, 1)
-    result = []
-    for ih in range(block_count_per_side):
-        top = min(ih*block_height, height-block_height-1)
-        for iw in range(block_count_per_side):
-            left = min(iw*block_width, width-block_width-1)
-            crop = image.copy(left, top, block_width, block_height)
-            result.append(getblock(crop))
-    return result
diff --git a/qt/pe/modules/block/setup.py b/qt/pe/modules/block/setup.py
index d1b1d8db..f57a5cb8 100644
--- a/qt/pe/modules/block/setup.py
+++ b/qt/pe/modules/block/setup.py
@@ -6,9 +6,7 @@
 
 from distutils.core import setup
 from distutils.extension import Extension
-from Cython.Distutils import build_ext
 
 setup(
-    cmdclass = {'build_ext': build_ext},
-    ext_modules = [Extension("_block", ["block.pyx"])]
+    ext_modules = [Extension("_block", ["block.c"])]
 )
\ No newline at end of file