added encoding basic example (not working currently)

oss-internship-2020/sapi_lodepng/README.md

@@ -10,3 +10,4 @@ TODO
 - clear redundant includes
 - check if security policy can be stricter
 - use addDirectoryAt instead of addDirectory
+

oss-internship-2020/sapi_lodepng/main.cc

@@ -109,6 +109,34 @@ void test1(const std::string &images_path) {
   }
 }
 
+void encodeOneStep(const char *filename, const unsigned char *image,
+                   unsigned width, unsigned height) {
+  /*Encode the image*/
+  unsigned error = lodepng_encode32_file(filename, image, width, height);
+
+  /*if there's an error, display it*/
+  if (error) printf("error %u: %s\n", error, lodepng_error_text(error));
+}
+
+void test2() {
+  const char *filename = "test_images/out/ok.png";
+  unsigned width = 512, height = 512;
+  unsigned char *image = (unsigned char *)malloc(width * height * 4);
+  unsigned x, y;
+  for (y = 0; y < height; y++) {
+    for (x = 0; x < width; x++) {
+      image[4 * width * y + 4 * x + 0] = 255 * !(x & y);
+      image[4 * width * y + 4 * x + 1] = x ^ y;
+      image[4 * width * y + 4 * x + 2] = x | y;
+      image[4 * width * y + 4 * x + 3] = 255;
+    }
+  }
+
+  /*run an example*/
+  // encodeOneStep(filename, image, width, height);
+  lodepng_encode32_file(filename, image, width, height);
+}
+
 int main(int argc, char *argv[]) {
   if (argc != 2) {
     std::cout << "usage: " << basename(argv[0]) << " images_folder_path"
@@ -119,5 +147,6 @@ int main(int argc, char *argv[]) {
   std::string images_path(argv[1]);
 
   test1(images_path);
+  test2();
   return 0;
 }

oss-internship-2020/sapi_lodepng/main_sandboxed.cc

@@ -78,34 +78,37 @@ void decode_and_encode32(SapiLodepngSandbox &sandbox, LodepngApi &api,
   // which is why the solution in which data is transferred around is used.
 }
 
-void test2(SapiLodepngSandbox &sandbox, LodepngApi &api, const std::string &images_path) {
-
-    srand(time(NULL)); // maybe use something else
+// this seems to not work as intended at the moment
+void test2(SapiLodepngSandbox &sandbox, LodepngApi &api,
+           const std::string &images_path) {
+  // srand(time(NULL)); // maybe use something else
   // int width = 1024, height = 1024;
   unsigned int width = 512, height = 512;
-    unsigned char *image = (unsigned char*)malloc(width * height * 4);
+  unsigned char *image = (unsigned char *)malloc(width * height * 4);
   // for (int i = 0; i < width * height; ++i) {
   //     image[i] = rand() % 256;
   // }
 
-    for(int y = 0; y < height; y++)
-    for(int x = 0; x < width; x++) {
+  for (int y = 0; y < height; y++) {
+    for (int x = 0; x < width; x++) {
       image[4 * width * y + 4 * x + 0] = 255 * !(x & y);
       image[4 * width * y + 4 * x + 1] = x ^ y;
       image[4 * width * y + 4 * x + 2] = x | y;
       image[4 * width * y + 4 * x + 3] = 255;
     }
+  }
 
   sapi::v::Array<unsigned char> image_(image, width * height);
   sapi::v::UInt width_(width), height_(height);
-    std::string filename = images_path + "/out/generate_and_encode_one_step1.png";
+  std::string filename = images_path + "/out/ok2.png";
   sapi::v::ConstCStr filename_(filename.c_str());
 
-    sandbox.Allocate(&image_).IgnoreError();
-    sandbox.TransferToSandboxee(&image_).IgnoreError();
+  // sandbox.Allocate(&image_).IgnoreError();
+  // sandbox.TransferToSandboxee(&image_).IgnoreError();
 
-    auto res = api.lodepng_encode32_file(filename_.PtrBefore(), image_.PtrBefore(), width_.GetValue(), height_.GetValue()).value();
-    std::cout << "res = " << res << std::endl;
+  api.lodepng_encode32_file(filename_.PtrBefore(), image_.PtrBefore(),
+                            width_.GetValue(), height_.GetValue())
+      .IgnoreError();
   free(image);
 }
 

oss-internship-2020/sapi_lodepng/main_unit_test.cc

@@ -26,21 +26,14 @@
 
 // defining the flag does not work as intended (always has the default value)
 // ignore for now
-ABSL_FLAG(string, images_path, std::filesystem::current_path().string(),
-          "path to the folder containing test images");
+// ABSL_FLAG(string, images_path, std::filesystem::current_path().string(),
+//           "path to the folder containing test images");
 
 namespace {
 
-// TODO find how to not use it like this.
+// TODO change this into pwd/something else
 std::string images_path = "/usr/local/google/home/amedar/internship/sandboxed-api/oss-internship-2020/sapi_lodepng/test_images";
 
-
-TEST(addition, basic) {
-  EXPECT_EQ(2, 1 + 1);
-//   std::cout << "flag=" << std::string(absl::GetFlag(FLAGS_images_path))
-//             << std::endl;
-}
-
 TEST(initSandbox, basic) {
     SapiLodepngSandbox sandbox(images_path);
     ASSERT_TRUE(sandbox.Init().ok());
@@ -54,18 +47,28 @@ TEST(encode32, generate_and_encode_one_step) {
 
 
     srand(time(NULL)); // maybe use something else
-    int width = 1024, height = 1024;
-    unsigned char *image = (unsigned char*)malloc(width * height);
-    for (int i = 0; i < width * height; ++i) {
-        image[i] = rand() % 256;
+    unsigned int width = 512, height = 512;
+    unsigned char *image = (unsigned char*)malloc(width * height * 4);
+
+    for(int y = 0; y < height; ++y) {
+    for(int x = 0; x < width; ++x) {
+    image[4 * width * y + 4 * x + 0] = 255 * !(x & y);
+    image[4 * width * y + 4 * x + 1] = x ^ y;
+    image[4 * width * y + 4 * x + 2] = x | y;
+    image[4 * width * y + 4 * x + 3] = 255;
+  }
     }
 
     sapi::v::Array<unsigned char> image_(image, width * height);
     sapi::v::UInt width_(width), height_(height);
-    std::string filename = images_path + " /out/generate_and_encode_one_step1.png";
+    std::string filename = images_path + "/out/generate_and_encode_one_step1.png";
     sapi::v::ConstCStr filename_(filename.c_str());
-    ASSERT_TRUE(api.lodepng_encode32_file(filename_.PtrBefore(), image_.PtrBefore(), width_.GetValue(), height_.GetValue()).ok());
 
+    ASSERT_TRUE(sandbox.Allocate(&image_).ok());
+    ASSERT_TRUE(sandbox.TransferToSandboxee(&image_).ok());
+
+    auto res = api.lodepng_encode32_file(filename_.PtrBefore(), image_.PtrBefore(), width_.GetValue(), height_.GetValue()).value();
+    free(image);
 }
 
 }  // namespace