--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancFramework/UnitTestsSources/ImageTests.cpp	Wed Jun 10 21:43:31 2020 +0200
@@ -0,0 +1,469 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#if ORTHANC_UNIT_TESTS_LINK_FRAMEWORK == 1
+#  include <OrthancFramework.h>
+#endif
+
+#include "gtest/gtest.h"
+
+#include "../Sources/Images/Font.h"
+#include "../Sources/Images/Image.h"
+#include "../Sources/Images/ImageProcessing.h"
+#include "../Sources/Images/JpegReader.h"
+#include "../Sources/Images/JpegWriter.h"
+#include "../Sources/Images/PngReader.h"
+#include "../Sources/Images/PngWriter.h"
+#include "../Sources/Images/PamReader.h"
+#include "../Sources/Images/PamWriter.h"
+#include "../Sources/SystemToolbox.h"
+#include "../Sources/Toolbox.h"
+#include "../Sources/TemporaryFile.h"
+
+#include <stdint.h>
+
+
+TEST(PngWriter, ColorPattern)
+{
+  Orthanc::PngWriter w;
+  unsigned int width = 17;
+  unsigned int height = 61;
+  unsigned int pitch = width * 3;
+
+  std::vector<uint8_t> image(height * pitch);
+  for (unsigned int y = 0; y < height; y++)
+  {
+    uint8_t *p = &image[0] + y * pitch;
+    for (unsigned 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;
+    }
+  }
+
+  Orthanc::ImageAccessor accessor;
+  accessor.AssignReadOnly(Orthanc::PixelFormat_RGB24, width, height, pitch, &image[0]);
+
+  w.WriteToFile("UnitTestsResults/ColorPattern.png", accessor);
+
+  std::string f, md5;
+  Orthanc::SystemToolbox::ReadFile(f, "UnitTestsResults/ColorPattern.png");
+  Orthanc::Toolbox::ComputeMD5(md5, f);
+  ASSERT_EQ("604e785f53c99cae6ea4584870b2c41d", md5);
+}
+
+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;
+    }
+  }
+
+  Orthanc::ImageAccessor accessor;
+  accessor.AssignReadOnly(Orthanc::PixelFormat_Grayscale8, width, height, pitch, &image[0]);
+
+  w.WriteToFile("UnitTestsResults/Gray8Pattern.png", accessor);
+
+  std::string f, md5;
+  Orthanc::SystemToolbox::ReadFile(f, "UnitTestsResults/Gray8Pattern.png");
+  Orthanc::Toolbox::ComputeMD5(md5, f);
+  ASSERT_EQ("5a9b98bea3d0a6d983980cc38bfbcdb3", md5);
+}
+
+TEST(PngWriter, Gray16Pattern)
+{
+  Orthanc::PngWriter w;
+  int width = 256;
+  int height = 256;
+  int pitch = width * 2 + 16;
+
+  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;
+    }
+  }
+
+  Orthanc::ImageAccessor accessor;
+  accessor.AssignReadOnly(Orthanc::PixelFormat_Grayscale16, width, height, pitch, &image[0]);
+  w.WriteToFile("UnitTestsResults/Gray16Pattern.png", accessor);
+
+  std::string f, md5;
+  Orthanc::SystemToolbox::ReadFile(f, "UnitTestsResults/Gray16Pattern.png");
+  Orthanc::Toolbox::ComputeMD5(md5, f);
+  ASSERT_EQ("0785866a08bf0a02d2eeff87f658571c", md5);
+}
+
+TEST(PngWriter, EndToEnd)
+{
+  Orthanc::PngWriter w;
+  unsigned int width = 256;
+  unsigned int height = 256;
+  unsigned int pitch = width * 2 + 16;
+
+  std::vector<uint8_t> image(height * pitch);
+
+  int v = 0;
+  for (unsigned int y = 0; y < height; y++)
+  {
+    uint16_t *p = reinterpret_cast<uint16_t*>(&image[0] + y * pitch);
+    for (unsigned int x = 0; x < width; x++, p++, v++)
+    {
+      *p = v;
+    }
+  }
+
+  Orthanc::ImageAccessor accessor;
+  accessor.AssignReadOnly(Orthanc::PixelFormat_Grayscale16, width, height, pitch, &image[0]);
+
+  std::string s;
+  w.WriteToMemory(s, accessor);
+
+  {
+    Orthanc::PngReader r;
+    r.ReadFromMemory(s);
+
+    ASSERT_EQ(r.GetFormat(), Orthanc::PixelFormat_Grayscale16);
+    ASSERT_EQ(r.GetWidth(), width);
+    ASSERT_EQ(r.GetHeight(), height);
+
+    v = 0;
+    for (unsigned int y = 0; y < height; y++)
+    {
+      const uint16_t *p = reinterpret_cast<const uint16_t*>((const uint8_t*) r.GetConstBuffer() + y * r.GetPitch());
+      ASSERT_EQ(p, r.GetConstRow(y));
+      for (unsigned int x = 0; x < width; x++, p++, v++)
+      {
+        ASSERT_EQ(*p, v);
+      }
+    }
+  }
+
+  {
+    Orthanc::TemporaryFile tmp;
+    tmp.Write(s);
+
+    Orthanc::PngReader r2;
+    r2.ReadFromFile(tmp.GetPath());
+
+    ASSERT_EQ(r2.GetFormat(), Orthanc::PixelFormat_Grayscale16);
+    ASSERT_EQ(r2.GetWidth(), width);
+    ASSERT_EQ(r2.GetHeight(), height);
+
+    v = 0;
+    for (unsigned int y = 0; y < height; y++)
+    {
+      const uint16_t *p = reinterpret_cast<const uint16_t*>((const uint8_t*) r2.GetConstBuffer() + y * r2.GetPitch());
+      ASSERT_EQ(p, r2.GetConstRow(y));
+      for (unsigned int x = 0; x < width; x++, p++, v++)
+      {
+        ASSERT_EQ(*p, v);
+      }
+    }
+  }
+}
+
+
+
+
+TEST(JpegWriter, Basic)
+{
+  std::string s;
+
+  {
+    Orthanc::Image img(Orthanc::PixelFormat_Grayscale8, 16, 16, false);
+    for (unsigned int y = 0, value = 0; y < img.GetHeight(); y++)
+    {
+      uint8_t* p = reinterpret_cast<uint8_t*>(img.GetRow(y));
+      for (unsigned int x = 0; x < img.GetWidth(); x++, p++)
+      {
+        *p = value++;
+      }
+    }
+
+    Orthanc::JpegWriter w;
+    w.WriteToFile("UnitTestsResults/hello.jpg", img);
+
+    w.WriteToMemory(s, img);
+    Orthanc::SystemToolbox::WriteFile(s, "UnitTestsResults/hello2.jpg");
+
+    std::string t;
+    Orthanc::SystemToolbox::ReadFile(t, "UnitTestsResults/hello.jpg");
+    ASSERT_EQ(s.size(), t.size());
+    ASSERT_EQ(0, memcmp(s.c_str(), t.c_str(), s.size()));
+  }
+
+  {
+    Orthanc::JpegReader r1, r2;
+    r1.ReadFromFile("UnitTestsResults/hello.jpg");
+    ASSERT_EQ(16u, r1.GetWidth());
+    ASSERT_EQ(16u, r1.GetHeight());
+
+    r2.ReadFromMemory(s);
+    ASSERT_EQ(16u, r2.GetWidth());
+    ASSERT_EQ(16u, r2.GetHeight());
+
+    for (unsigned int y = 0; y < r1.GetHeight(); y++)
+    {
+      const uint8_t* p1 = reinterpret_cast<const uint8_t*>(r1.GetConstRow(y));
+      const uint8_t* p2 = reinterpret_cast<const uint8_t*>(r2.GetConstRow(y));
+      for (unsigned int x = 0; x < r1.GetWidth(); x++)
+      {
+        ASSERT_EQ(*p1, *p2);
+      }
+    }
+  }
+}
+
+
+TEST(PamWriter, ColorPattern)
+{
+  Orthanc::PamWriter w;
+  unsigned int width = 17;
+  unsigned int height = 61;
+  unsigned int pitch = width * 3;
+
+  std::vector<uint8_t> image(height * pitch);
+  for (unsigned int y = 0; y < height; y++)
+  {
+    uint8_t *p = &image[0] + y * pitch;
+    for (unsigned 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;
+    }
+  }
+
+  Orthanc::ImageAccessor accessor;
+  accessor.AssignReadOnly(Orthanc::PixelFormat_RGB24, width, height, pitch, &image[0]);
+
+  w.WriteToFile("UnitTestsResults/ColorPattern.pam", accessor);
+
+  std::string f, md5;
+  Orthanc::SystemToolbox::ReadFile(f, "UnitTestsResults/ColorPattern.pam");
+  Orthanc::Toolbox::ComputeMD5(md5, f);
+  ASSERT_EQ("81a3441754e88969ebbe53e69891e841", md5);
+}
+
+TEST(PamWriter, Gray8Pattern)
+{
+  Orthanc::PamWriter 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;
+    }
+  }
+
+  Orthanc::ImageAccessor accessor;
+  accessor.AssignReadOnly(Orthanc::PixelFormat_Grayscale8, width, height, pitch, &image[0]);
+
+  w.WriteToFile("UnitTestsResults/Gray8Pattern.pam", accessor);
+
+  std::string f, md5;
+  Orthanc::SystemToolbox::ReadFile(f, "UnitTestsResults/Gray8Pattern.pam");
+  Orthanc::Toolbox::ComputeMD5(md5, f);
+  ASSERT_EQ("7873c408d26a9d11dd1c1de5e69cc0a3", md5);
+}
+
+TEST(PamWriter, Gray16Pattern)
+{
+  Orthanc::PamWriter w;
+  int width = 256;
+  int height = 256;
+  int pitch = width * 2 + 16;
+
+  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;
+    }
+  }
+
+  Orthanc::ImageAccessor accessor;
+  accessor.AssignReadOnly(Orthanc::PixelFormat_Grayscale16, width, height, pitch, &image[0]);
+  w.WriteToFile("UnitTestsResults/Gray16Pattern.pam", accessor);
+
+  std::string f, md5;
+  Orthanc::SystemToolbox::ReadFile(f, "UnitTestsResults/Gray16Pattern.pam");
+  Orthanc::Toolbox::ComputeMD5(md5, f);
+  ASSERT_EQ("b268772bf28f3b2b8520ff21c5e3dcb6", md5);
+}
+
+TEST(PamWriter, EndToEnd)
+{
+  Orthanc::PamWriter w;
+  unsigned int width = 256;
+  unsigned int height = 256;
+  unsigned int pitch = width * 2 + 16;
+
+  std::vector<uint8_t> image(height * pitch);
+
+  int v = 0;
+  for (unsigned int y = 0; y < height; y++)
+  {
+    uint16_t *p = reinterpret_cast<uint16_t*>(&image[0] + y * pitch);
+    for (unsigned int x = 0; x < width; x++, p++, v++)
+    {
+      *p = v;
+    }
+  }
+
+  Orthanc::ImageAccessor accessor;
+  accessor.AssignReadOnly(Orthanc::PixelFormat_Grayscale16, width, height, pitch, &image[0]);
+
+  std::string s;
+  w.WriteToMemory(s, accessor);
+
+  {
+    Orthanc::PamReader r;
+    r.ReadFromMemory(s);
+
+    ASSERT_EQ(r.GetFormat(), Orthanc::PixelFormat_Grayscale16);
+    ASSERT_EQ(r.GetWidth(), width);
+    ASSERT_EQ(r.GetHeight(), height);
+
+    v = 0;
+    for (unsigned int y = 0; y < height; y++)
+    {
+      const uint16_t *p = reinterpret_cast<const uint16_t*>
+        ((const uint8_t*) r.GetConstBuffer() + y * r.GetPitch());
+      ASSERT_EQ(p, r.GetConstRow(y));
+      for (unsigned int x = 0; x < width; x++, p++, v++)
+      {
+        ASSERT_EQ(v, *p);
+      }
+    }
+  }
+
+  {
+    // true means "enforce alignment by using a temporary buffer"
+    Orthanc::PamReader r(true);
+    r.ReadFromMemory(s);
+
+    ASSERT_EQ(r.GetFormat(), Orthanc::PixelFormat_Grayscale16);
+    ASSERT_EQ(r.GetWidth(), width);
+    ASSERT_EQ(r.GetHeight(), height);
+
+    v = 0;
+    for (unsigned int y = 0; y < height; y++)
+    {
+      const uint16_t* p = reinterpret_cast<const uint16_t*>
+        ((const uint8_t*)r.GetConstBuffer() + y * r.GetPitch());
+      ASSERT_EQ(p, r.GetConstRow(y));
+      for (unsigned int x = 0; x < width; x++, p++, v++)
+      {
+        ASSERT_EQ(v, *p);
+      }
+    }
+  }
+
+  {
+    Orthanc::TemporaryFile tmp;
+    tmp.Write(s);
+
+    Orthanc::PamReader r2;
+    r2.ReadFromFile(tmp.GetPath());
+
+    ASSERT_EQ(r2.GetFormat(), Orthanc::PixelFormat_Grayscale16);
+    ASSERT_EQ(r2.GetWidth(), width);
+    ASSERT_EQ(r2.GetHeight(), height);
+
+    v = 0;
+    for (unsigned int y = 0; y < height; y++)
+    {
+      const uint16_t *p = reinterpret_cast<const uint16_t*>
+        ((const uint8_t*) r2.GetConstBuffer() + y * r2.GetPitch());
+      ASSERT_EQ(p, r2.GetConstRow(y));
+      for (unsigned int x = 0; x < width; x++, p++, v++)
+      {
+        ASSERT_EQ(*p, v);
+      }
+    }
+  }
+
+  {
+    Orthanc::TemporaryFile tmp;
+    tmp.Write(s);
+
+    // true means "enforce alignment by using a temporary buffer"
+    Orthanc::PamReader r2(true);
+    r2.ReadFromFile(tmp.GetPath());
+
+    ASSERT_EQ(r2.GetFormat(), Orthanc::PixelFormat_Grayscale16);
+    ASSERT_EQ(r2.GetWidth(), width);
+    ASSERT_EQ(r2.GetHeight(), height);
+
+    v = 0;
+    for (unsigned int y = 0; y < height; y++)
+    {
+      const uint16_t* p = reinterpret_cast<const uint16_t*>
+        ((const uint8_t*)r2.GetConstBuffer() + y * r2.GetPitch());
+      ASSERT_EQ(p, r2.GetConstRow(y));
+      for (unsigned int x = 0; x < width; x++, p++, v++)
+      {
+        ASSERT_EQ(*p, v);
+      }
+    }
+  }
+
+}