mirror of
https://github.com/google/sandboxed-api.git
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261 lines
7.5 KiB
C++
261 lines
7.5 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdio.h>
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#include <stdlib.h>
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#include <cassert>
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#include <filesystem>
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#include <iostream>
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// #include <libgen.h>
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#include "lodepng/lodepng.h"
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// bool cmp_images32(const std::string &f1, const std::string &f2) {
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// std::cout << "COMPARING IMAGES " << basename(f1.c_str()) << " -> "
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// << basename(f2.c_str()) << std::endl;
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// unsigned int error, width1, height1;
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// unsigned char *image1 = 0;
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// unsigned int width2, height2;
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// unsigned char *image2 = 0;
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// error = lodepng_decode32_file(&image1, &width1, &height1, f1.c_str());
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// if (error) {
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// std::cerr << "error " << error << ": " << lodepng_error_text(error)
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// << std::endl;
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// return false;
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// }
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// error = lodepng_decode32_file(&image2, &width2, &height2, f2.c_str());
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// if (error) {
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// std::cerr << "error " << error << ": " << lodepng_error_text(error)
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// << std::endl;
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// return false;
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// }
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// if (width1 != width2 || height1 != height2) {
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// std::cerr << "DIMENSIONS DIFFER\n";
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// return false;
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// }
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// std::cout << "width height = " << width1 << " " << height1 << std::endl;
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// for (int i = 0; i < width1 * height1; ++i) {
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// if (image1[i] != image2[i]) {
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// std::cerr << "PIXELS DIFFER AT i = " << i << std::endl;
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// return false;
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// }
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// }
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// return true;
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// }
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// // copies an image into another and compares them
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// void decode_and_encode32(const std::string &filename1,
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// const std::string &filename2) {
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// unsigned int error, width, height;
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// unsigned char *image = 0;
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// error = lodepng_decode32_file(&image, &width, &height, filename1.c_str());
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// if (error) {
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// std::cerr << "error " << error << ": " << lodepng_error_text(error)
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// << std::endl;
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// return;
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// }
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// error = lodepng_encode32_file(filename2.c_str(), image, width, height);
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// if (error) {
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// std::cerr << "error " << error << ": " << lodepng_error_text(error)
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// << std::endl;
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// return;
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// }
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// free(image);
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// }
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// void test1(const std::string &images_path) {
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// std::cout << "test1" << std::endl;
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// std::string filename1 = images_path + "/test1.png";
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// std::string filename2 = images_path + "/out/test1_1out.png";
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// std::string filename3 = images_path + "/out/test1_2out.png";
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// decode_and_encode32(filename1, filename2);
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// decode_and_encode32(filename1, filename3);
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// if (!cmp_images32(filename1, filename2)) {
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// std::cout << "files are different" << std::endl;
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// } else {
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// std::cout << "files are not different" << std::endl;
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// }
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// if (!cmp_images32(filename3, filename2)) {
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// std::cout << "files are different" << std::endl;
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// } else {
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// std::cout << "files are not different" << std::endl;
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// }
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// }
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// void encodeOneStep(const char *filename, const unsigned char *image,
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// unsigned width, unsigned height) {
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// /*Encode the image*/
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// unsigned error = lodepng_encode32_file(filename, image, width, height);
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// /*if there's an error, display it*/
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// if (error) printf("error %u: %s\n", error, lodepng_error_text(error));
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// }
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// void test2() {
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// const char *filename = "test_images/out/ok.png";
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// unsigned width = 512, height = 512;
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// unsigned char *image = (unsigned char *)malloc(width * height * 4);
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// unsigned x, y;
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// for (y = 0; y < height; y++) {
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// for (x = 0; x < width; x++) {
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// image[4 * width * y + 4 * x + 0] = 255 * !(x & y);
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// image[4 * width * y + 4 * x + 1] = x ^ y;
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// image[4 * width * y + 4 * x + 2] = x | y;
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// image[4 * width * y + 4 * x + 3] = 255;
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// }
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// }
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// /*run an example*/
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// // encodeOneStep(filename, image, width, height);
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// lodepng_encode32_file(filename, image, width, height);
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// }
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void generate_one_step(const std::string &images_path) {
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unsigned int width = 512, height = 512;
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unsigned char *image = (unsigned char *)malloc(width * height * 4);
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assert(image);
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for (int y = 0; y < height; ++y) {
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for (int x = 0; x < width; ++x) {
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image[4 * width * y + 4 * x + 0] = 255 * !(x & y);
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image[4 * width * y + 4 * x + 1] = x ^ y;
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image[4 * width * y + 4 * x + 2] = x | y;
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image[4 * width * y + 4 * x + 3] = 255;
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}
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}
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// encode the image
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std::string filename = images_path + "/out_generated1.png";
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unsigned int result =
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lodepng_encode32_file(filename.c_str(), image, width, height);
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assert(!result);
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// after the image has been encoded, decode it to check that the
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// pixel values are the same
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unsigned int width2, height2;
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unsigned char *image2 = 0;
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result = lodepng_decode32_file(&image2, &width2, &height2, filename.c_str());
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assert(!result);
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assert(width2 == width);
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assert(height2 == height);
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// now, we can compare the values
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for (size_t i = 0; i < width * height * 4; ++i) {
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assert(image2[i] == image[i]);
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}
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free(image);
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}
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void generate_two_steps(const std::string &images_path) {
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// generate the values
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unsigned int width = 512, height = 512;
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unsigned char *image = (unsigned char *)malloc(width * height * 4);
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assert(image);
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for (int y = 0; y < height; ++y) {
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for (int x = 0; x < width; ++x) {
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image[4 * width * y + 4 * x + 0] = 255 * !(x & y);
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image[4 * width * y + 4 * x + 1] = x ^ y;
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image[4 * width * y + 4 * x + 2] = x | y;
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image[4 * width * y + 4 * x + 3] = 255;
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}
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}
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// encode the image into memory first
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std::string filename = images_path + "/out_generated2.png";
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unsigned char *png;
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size_t pngsize;
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unsigned int result = lodepng_encode32(&png, &pngsize, image, width, height);
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assert(!result);
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// write the image into the file (from memory)
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result = lodepng_save_file(png, pngsize, filename.c_str());
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assert(!result);
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// now, decode the image using the 2 steps in order to compare the values
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unsigned int width2, height2;
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unsigned char *png2;
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size_t pngsize2;
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// load the file in memory
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result = lodepng_load_file(&png2, &pngsize2, filename.c_str());
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assert(!result);
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assert(pngsize == pngsize2);
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// after the file is loaded, decode it so we have access to the values
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// directly
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// sapi::v::IntBase<unsigned char *> sapi_png_ptr3(0);
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// result = api.lodepng_decode32(
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// sapi_png_ptr3.PtrBoth(), sapi_width2.PtrBoth(),
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// sapi_height2.PtrBoth(), sapi_png_array2.PtrBefore(),
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// sapi_pngsize2.GetValue());
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unsigned char *image2;
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result = lodepng_decode32(&image2, &width2, &height2, png2, pngsize2);
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assert(!result);
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assert(width2 == width);
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assert(height2 == height);
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// compare values
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for (size_t i = 0; i < width * height * 4; ++i) {
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assert(image2[i] == image[i]);
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}
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free(image);
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}
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int main(int argc, char *argv[]) {
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std::string images_path = std::filesystem::current_path().string();
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std::cout << "path = " << images_path << std::endl;
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// std::cout << "dirname = " << dirname((char*)images_path.c_str()) << std::endl;
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generate_one_step(images_path);
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generate_two_steps(images_path);
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return 0;
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} |