--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/UnitTests/PngWriter.cpp	Mon Feb 18 16:07:28 2013 +0100
@@ -0,0 +1,67 @@
+#include "gtest/gtest.h"
+
+#include <stdint.h>
+#include "../Core/PngWriter.h"
+
+TEST(PngWriter, ColorPattern)
+{
+  Orthanc::PngWriter w;
+  int width = 17;
+  int height = 61;
+  int pitch = width * 3;
+
+  std::vector<uint8_t> image(height * pitch);
+  for (int y = 0; y < height; y++)
+  {
+    uint8_t *p = &image[0] + y * pitch;
+    for (int x = 0; x < width; x++, p += 3)
+    {
+      p[0] = (y % 3 == 0) ? 255 : 0;
+      p[1] = (y % 3 == 1) ? 255 : 0;
+      p[2] = (y % 3 == 2) ? 255 : 0;
+    }
+  }
+
+  w.WriteToFile("ColorPattern.png", width, height, pitch, Orthanc::PixelFormat_RGB24, &image[0]);
+}
+
+TEST(PngWriter, Gray8Pattern)
+{
+  Orthanc::PngWriter w;
+  int width = 17;
+  int height = 256;
+  int pitch = width;
+
+  std::vector<uint8_t> image(height * pitch);
+  for (int y = 0; y < height; y++)
+  {
+    uint8_t *p = &image[0] + y * pitch;
+    for (int x = 0; x < width; x++, p++)
+    {
+      *p = y;
+    }
+  }
+
+  w.WriteToFile("Gray8Pattern.png", width, height, pitch, Orthanc::PixelFormat_Grayscale8, &image[0]);
+}
+
+TEST(PngWriter, Gray16Pattern)
+{
+  Orthanc::PngWriter w;
+  int width = 256;
+  int height = 256;
+  int pitch = width * 2 + 17;
+
+  std::vector<uint8_t> image(height * pitch);
+  int v = 0;
+  for (int y = 0; y < height; y++)
+  {
+    uint16_t *p = reinterpret_cast<uint16_t*>(&image[0] + y * pitch);
+    for (int x = 0; x < width; x++, p++, v++)
+    {
+      *p = v;
+    }
+  }
+
+  w.WriteToFile("Gray16Pattern.png", width, height, pitch, Orthanc::PixelFormat_Grayscale16, &image[0]);
+}